text: /*
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version 2
   * of the License, or (at your option) any later version.
   *
   * This program is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   * GNU General Public License for more details.
   *
   * You should have received a copy of the GNU General Public License
   * along with this program; if not, write to the Free Software Foundation,
   * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
   *
   * The Original Code is Copyright (C) 2005 Blender Foundation.
   * All rights reserved.
   */
  
  /** \file
   * \ingroup spnode
   * \brief lower level node drawing for nodes (boarders, headers etc), also node layout.
   */
  
  #include "BLI_blenlib.h"
  #include "BLI_math.h"
  #include "BLI_system.h"
  
  #include "DNA_node_types.h"
  #include "DNA_object_types.h"
  #include "DNA_space_types.h"
  #include "DNA_screen_types.h"
  #include "DNA_userdef_types.h"
  #include "DNA_text_types.h"
  
  #include "BKE_context.h"
  #include "BKE_curve.h"
  #include "BKE_image.h"
  #include "BKE_main.h"
  #include "BKE_node.h"
  #include "BKE_tracking.h"
  
  #include "BLF_api.h"
  #include "BLT_translation.h"
  
  #include "BIF_glutil.h"
  
  #include "GPU_batch.h"
  #include "GPU_batch_presets.h"
  #include "GPU_platform.h"
  #include "GPU_immediate.h"
  #include "GPU_matrix.h"
  #include "GPU_state.h"
  
  #include "RNA_access.h"
  #include "RNA_define.h"
  
  #include "ED_node.h"
  #include "ED_space_api.h"
  
  #include "WM_api.h"
  #include "WM_types.h"
  
  #include "UI_resources.h"
  #include "UI_view2d.h"
  
  #include "IMB_colormanagement.h"
  #include "IMB_imbuf_types.h"
  
  #include "node_intern.h" /* own include */
  #include "NOD_composite.h"
  #include "NOD_shader.h"
  #include "NOD_texture.h"
  
  /* ****************** SOCKET BUTTON DRAW FUNCTIONS ***************** */
  
  static void node_socket_button_label(bContext *UNUSED(C),
                                       uiLayout *layout,
                                       PointerRNA *UNUSED(ptr),
                                       PointerRNA *UNUSED(node_ptr),
                                       const char *text)
  {
    uiItemL(layout, text, 0);
  }
  
  /* ****************** BUTTON CALLBACKS FOR ALL TREES ***************** */
  
  static void node_buts_value(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    /* first output stores value */
    bNodeSocket *output = node->outputs.first;
    PointerRNA sockptr;
    RNA_pointer_create(ptr->owner_id, &RNA_NodeSocket, output, &sockptr);
  
    uiItemR(layout, &sockptr, "default_value", 0, "", ICON_NONE);
  }
  
  static void node_buts_rgb(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    /* first output stores value */
    bNodeSocket *output = node->outputs.first;
    PointerRNA sockptr;
    uiLayout *col;
    RNA_pointer_create(ptr->owner_id, &RNA_NodeSocket, output, &sockptr);
  
    col = uiLayoutColumn(layout, false);
    uiTemplateColorPicker(col, &sockptr, "default_value", 1, 0, 0, 0);
    uiItemR(col, &sockptr, "default_value", UI_ITEM_R_SLIDER, "", ICON_NONE);
  }
  
  static void node_buts_mix_rgb(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *row, *col;
  
    bNodeTree *ntree = (bNodeTree *)ptr->owner_id;
  
    col = uiLayoutColumn(layout, false);
    row = uiLayoutRow(col, true);
    uiItemR(row, ptr, "blend_type", 0, "", ICON_NONE);
    if (ELEM(ntree->type, NTREE_COMPOSIT, NTREE_TEXTURE)) {
      uiItemR(row, ptr, "use_alpha", 0, "", ICON_IMAGE_RGB_ALPHA);
    }
  
    uiItemR(col, ptr, "use_clamp", 0, NULL, ICON_NONE);
  }
  
  static void node_buts_time(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *row;
  #if 0
    /* XXX no context access here .. */
    bNode *node = ptr->data;
    CurveMapping *cumap = node->storage;
  
    if (cumap) {
      cumap->flag |= CUMA_DRAW_CFRA;
      if (node->custom1 < node->custom2) {
        cumap->sample[0] = (float)(CFRA - node->custom1) / (float)(node->custom2 - node->custom1);
      }
    }
  #endif
  
    uiTemplateCurveMapping(layout, ptr, "curve", 's', false, false, false, false);
  
    row = uiLayoutRow(layout, true);
    uiItemR(row, ptr, "frame_start", 0, IFACE_("Sta"), ICON_NONE);
    uiItemR(row, ptr, "frame_end", 0, IFACE_("End"), ICON_NONE);
  }
  
  static void node_buts_colorramp(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiTemplateColorRamp(layout, ptr, "color_ramp", 0);
  }
  
  static void node_buts_curvevec(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiTemplateCurveMapping(layout, ptr, "mapping", 'v', false, false, false, false);
  }
  
  #define SAMPLE_FLT_ISNONE FLT_MAX
  /* bad bad, 2.5 will do better?... no it won't... */
  static float _sample_col[4] = {SAMPLE_FLT_ISNONE};
  void ED_node_sample_set(const float col[4])
  {
    if (col) {
      copy_v4_v4(_sample_col, col);
    }
    else {
      copy_v4_fl(_sample_col, SAMPLE_FLT_ISNONE);
    }
  }
  
  static void node_buts_curvecol(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    CurveMapping *cumap = node->storage;
  
    if (_sample_col[0] != SAMPLE_FLT_ISNONE) {
      cumap->flag |= CUMA_DRAW_SAMPLE;
      copy_v3_v3(cumap->sample, _sample_col);
    }
    else {
      cumap->flag &= ~CUMA_DRAW_SAMPLE;
    }
  
    uiTemplateCurveMapping(layout, ptr, "mapping", 'c', false, false, false, true);
  }
  
  static void node_buts_normal(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    /* first output stores normal */
    bNodeSocket *output = node->outputs.first;
    PointerRNA sockptr;
    RNA_pointer_create(ptr->owner_id, &RNA_NodeSocket, output, &sockptr);
  
    uiItemR(layout, &sockptr, "default_value", 0, "", ICON_NONE);
  }
  
  #if 0 /* not used in 2.5x yet */
  static void node_browse_tex_cb(bContext *C, void *ntree_v, void *node_v)
  {
    Main *bmain = CTX_data_main(C);
    bNodeTree *ntree = ntree_v;
    bNode *node = node_v;
    Tex *tex;
  
    if (node->menunr < 1) {
      return;
    }
  
    if (node->id) {
      id_us_min(node->id);
      node->id = NULL;
    }
    tex = BLI_findlink(&bmain->tex, node->menunr - 1);
  
    node->id = &tex->id;
    id_us_plus(node->id);
    BLI_strncpy(node->name, node->id->name + 2, sizeof(node->name));
  
    nodeSetActive(ntree, node);
  
    if (ntree->type == NTREE_TEXTURE) {
      ntreeTexCheckCyclics(ntree);
    }
  
    // allqueue(REDRAWBUTSSHADING, 0);
    // allqueue(REDRAWNODE, 0);
    NodeTagChanged(ntree, node);
  
    node->menunr = 0;
  }
  #endif
  
  static void node_buts_texture(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    bNode *node = ptr->data;
  
    short multi = (node->id && ((Tex *)node->id)->use_nodes && (node->type != CMP_NODE_TEXTURE) &&
                   (node->type != TEX_NODE_TEXTURE));
  
    uiItemR(layout, ptr, "texture", 0, "", ICON_NONE);
  
    if (multi) {
      /* Number Drawing not optimal here, better have a list*/
      uiItemR(layout, ptr, "node_output", 0, "", ICON_NONE);
    }
  }
  
  static void node_shader_buts_clamp(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "clamp_type", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_map_range(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "interpolation_type", 0, "", ICON_NONE);
    if (!ELEM(RNA_enum_get(ptr, "interpolation_type"),
              NODE_MAP_RANGE_SMOOTHSTEP,
              NODE_MAP_RANGE_SMOOTHERSTEP)) {
      uiItemR(layout, ptr, "clamp", 0, NULL, ICON_NONE);
    }
  }
  
  static void node_buts_math(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "operation", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "use_clamp", 0, NULL, ICON_NONE);
  }
  
  static int node_resize_area_default(bNode *node, int x, int y)
  {
    if (node->flag & NODE_HIDDEN) {
      rctf totr = node->totr;
      /* right part of node */
      totr.xmin = node->totr.xmax - 20.0f;
      if (BLI_rctf_isect_pt(&totr, x, y)) {
        return NODE_RESIZE_RIGHT;
      }
      else {
        return 0;
      }
    }
    else {
      const float size = NODE_RESIZE_MARGIN;
      rctf totr = node->totr;
      int dir = 0;
  
      if (x >= totr.xmax - size && x < totr.xmax && y >= totr.ymin && y < totr.ymax) {
        dir |= NODE_RESIZE_RIGHT;
      }
      if (x >= totr.xmin && x < totr.xmin + size && y >= totr.ymin && y < totr.ymax) {
        dir |= NODE_RESIZE_LEFT;
      }
      return dir;
    }
  }
  
  /* ****************** BUTTON CALLBACKS FOR COMMON NODES ***************** */
  
  static void node_draw_buttons_group(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    uiTemplateIDBrowse(
        layout, C, ptr, "node_tree", NULL, NULL, NULL, UI_TEMPLATE_ID_FILTER_ALL, NULL);
  }
  
  /* XXX Does a bounding box update by iterating over all children.
   * Not ideal to do this in every draw call, but doing as transform callback doesn't work,
   * since the child node totr rects are not updated properly at that point.
   */
  static void node_draw_frame_prepare(const bContext *UNUSED(C), bNodeTree *ntree, bNode *node)
  {
    const float margin = 1.5f * U.widget_unit;
    NodeFrame *data = (NodeFrame *)node->storage;
    bool bbinit;
    bNode *tnode;
    rctf rect, noderect;
    float xmax, ymax;
  
    /* init rect from current frame size */
    node_to_view(node, node->offsetx, node->offsety, &rect.xmin, &rect.ymax);
    node_to_view(
        node, node->offsetx + node->width, node->offsety - node->height, &rect.xmax, &rect.ymin);
  
    /* frame can be resized manually only if shrinking is disabled or no children are attached */
    data->flag |= NODE_FRAME_RESIZEABLE;
    /* for shrinking bbox, initialize the rect from first child node */
    bbinit = (data->flag & NODE_FRAME_SHRINK);
    /* fit bounding box to all children */
    for (tnode = ntree->nodes.first; tnode; tnode = tnode->next) {
      if (tnode->parent != node) {
        continue;
      }
  
      /* add margin to node rect */
      noderect = tnode->totr;
      noderect.xmin -= margin;
      noderect.xmax += margin;
      noderect.ymin -= margin;
      noderect.ymax += margin;
  
      /* first child initializes frame */
      if (bbinit) {
        bbinit = 0;
        rect = noderect;
        data->flag &= ~NODE_FRAME_RESIZEABLE;
      }
      else {
        BLI_rctf_union(&rect, &noderect);
      }
    }
  
    /* now adjust the frame size from view-space bounding box */
    node_from_view(node, rect.xmin, rect.ymax, &node->offsetx, &node->offsety);
    node_from_view(node, rect.xmax, rect.ymin, &xmax, &ymax);
    node->width = xmax - node->offsetx;
    node->height = -ymax + node->offsety;
  
    node->totr = rect;
  }
  
  static void node_draw_frame_label(bNodeTree *ntree, bNode *node, const float aspect)
  {
    /* XXX font id is crap design */
    const int fontid = UI_style_get()->widgetlabel.uifont_id;
    NodeFrame *data = (NodeFrame *)node->storage;
    rctf *rct = &node->totr;
    int color_id = node_get_colorid(node);
    char label[MAX_NAME];
    /* XXX a bit hacky, should use separate align values for x and y */
    float width, ascender;
    float x, y;
    const int font_size = data->label_size / aspect;
    const float margin = (float)(NODE_DY / 4);
    int label_height;
    unsigned char color[3];
  
    nodeLabel(ntree, node, label, sizeof(label));
  
    BLF_enable(fontid, BLF_ASPECT);
    BLF_aspect(fontid, aspect, aspect, 1.0f);
    /* clamp otherwise it can suck up a LOT of memory */
    BLF_size(fontid, MIN2(24, font_size), U.dpi);
  
    /* title color */
    UI_GetThemeColorBlendShade3ubv(TH_TEXT, color_id, 0.4f, 10, color);
    BLF_color3ubv(fontid, color);
  
    width = BLF_width(fontid, label, sizeof(label));
    ascender = BLF_ascender(fontid);
    label_height = ((margin / aspect) + (ascender * aspect));
  
    /* 'x' doesn't need aspect correction */
    x = BLI_rctf_cent_x(rct) - (0.5f * width);
    y = rct->ymax - label_height;
  
    BLF_position(fontid, x, y, 0);
    BLF_draw(fontid, label, BLF_DRAW_STR_DUMMY_MAX);
  
    /* draw text body */
    if (node->id) {
      Text *text = (Text *)node->id;
      TextLine *line;
      const int line_height_max = BLF_height_max(fontid);
      const float line_spacing = (line_height_max * aspect);
      const float line_width = (BLI_rctf_size_x(rct) - margin) / aspect;
      int y_min;
  
      /* 'x' doesn't need aspect correction */
      x = rct->xmin + margin;
      y = rct->ymax - (label_height + line_spacing);
      /* early exit */
      y_min = y + ((margin * 2) - (y - rct->ymin));
  
      BLF_enable(fontid, BLF_CLIPPING | BLF_WORD_WRAP);
      BLF_clipping(fontid,
                   rct->xmin,
                   /* round to avoid clipping half-way through a line */
                   y - (floorf(((y - rct->ymin) - (margin * 2)) / line_spacing) * line_spacing),
                   rct->xmin + line_width,
                   rct->ymax);
  
      BLF_wordwrap(fontid, line_width);
  
      for (line = text->lines.first; line; line = line->next) {
        struct ResultBLF info;
        if (line->line[0]) {
          BLF_position(fontid, x, y, 0);
          BLF_draw_ex(fontid, line->line, line->len, &info);
          y -= line_spacing * info.lines;
        }
        else {
          y -= line_spacing;
        }
        if (y < y_min) {
          break;
        }
      }
  
      BLF_disable(fontid, BLF_CLIPPING | BLF_WORD_WRAP);
    }
  
    BLF_disable(fontid, BLF_ASPECT);
  }
  
  static void node_draw_frame(const bContext *C,
                              ARegion *ar,
                              SpaceNode *snode,
                              bNodeTree *ntree,
                              bNode *node,
                              bNodeInstanceKey UNUSED(key))
  {
    rctf *rct = &node->totr;
    int color_id = node_get_colorid(node);
    float color[4];
    float alpha;
  
    /* skip if out of view */
    if (BLI_rctf_isect(&node->totr, &ar->v2d.cur, NULL) == false) {
      UI_block_end(C, node->block);
      node->block = NULL;
      return;
    }
  
    UI_GetThemeColor4fv(TH_NODE_FRAME, color);
    alpha = color[3];
  
    /* shadow */
    node_draw_shadow(snode, node, BASIS_RAD, alpha);
  
    /* body */
    if (node->flag & NODE_CUSTOM_COLOR) {
      rgba_float_args_set(color, node->color[0], node->color[1], node->color[2], alpha);
    }
    else {
      UI_GetThemeColor4fv(TH_NODE_FRAME, color);
    }
  
    UI_draw_roundbox_corner_set(UI_CNR_ALL);
    UI_draw_roundbox_aa(true, rct->xmin, rct->ymin, rct->xmax, rct->ymax, BASIS_RAD, color);
  
    /* outline active and selected emphasis */
    if (node->flag & SELECT) {
      if (node->flag & NODE_ACTIVE) {
        UI_GetThemeColorShadeAlpha4fv(TH_ACTIVE, 0, -40, color);
      }
      else {
        UI_GetThemeColorShadeAlpha4fv(TH_SELECT, 0, -40, color);
      }
  
      UI_draw_roundbox_aa(false, rct->xmin, rct->ymin, rct->xmax, rct->ymax, BASIS_RAD, color);
    }
  
    /* label */
    node_draw_frame_label(ntree, node, snode->aspect);
  
    UI_ThemeClearColor(color_id);
  
    UI_block_end(C, node->block);
    UI_block_draw(C, node->block);
    node->block = NULL;
  }
  
  static int node_resize_area_frame(bNode *node, int x, int y)
  {
    const float size = 10.0f;
    NodeFrame *data = (NodeFrame *)node->storage;
    rctf totr = node->totr;
    int dir = 0;
  
    /* shrinking frame size is determined by child nodes */
    if (!(data->flag & NODE_FRAME_RESIZEABLE)) {
      return 0;
    }
  
    if (x >= totr.xmax - size && x < totr.xmax && y >= totr.ymin && y < totr.ymax) {
      dir |= NODE_RESIZE_RIGHT;
    }
    if (x >= totr.xmin && x < totr.xmin + size && y >= totr.ymin && y < totr.ymax) {
      dir |= NODE_RESIZE_LEFT;
    }
    if (x >= totr.xmin && x < totr.xmax && y >= totr.ymax - size && y < totr.ymax) {
      dir |= NODE_RESIZE_TOP;
    }
    if (x >= totr.xmin && x < totr.xmax && y >= totr.ymin && y < totr.ymin + size) {
      dir |= NODE_RESIZE_BOTTOM;
    }
  
    return dir;
  }
  
  static void node_buts_frame_ex(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "label_size", 0, IFACE_("Label Size"), ICON_NONE);
    uiItemR(layout, ptr, "shrink", 0, IFACE_("Shrink"), ICON_NONE);
    uiItemR(layout, ptr, "text", 0, NULL, ICON_NONE);
  }
  
  #define NODE_REROUTE_SIZE 8.0f
  
  static void node_draw_reroute_prepare(const bContext *UNUSED(C),
                                        bNodeTree *UNUSED(ntree),
                                        bNode *node)
  {
    bNodeSocket *nsock;
    float locx, locy;
    float size = NODE_REROUTE_SIZE;
  
    /* get "global" coords */
    node_to_view(node, 0.0f, 0.0f, &locx, &locy);
  
    /* reroute node has exactly one input and one output, both in the same place */
    nsock = node->outputs.first;
    nsock->locx = locx;
    nsock->locy = locy;
  
    nsock = node->inputs.first;
    nsock->locx = locx;
    nsock->locy = locy;
  
    node->width = size * 2;
    node->totr.xmin = locx - size;
    node->totr.xmax = locx + size;
    node->totr.ymax = locy + size;
    node->totr.ymin = locy - size;
  }
  
  static void node_draw_reroute(const bContext *C,
                                ARegion *ar,
                                SpaceNode *UNUSED(snode),
                                bNodeTree *ntree,
                                bNode *node,
                                bNodeInstanceKey UNUSED(key))
  {
    char showname[128]; /* 128 used below */
    rctf *rct = &node->totr;
  
    /* skip if out of view */
    if (node->totr.xmax < ar->v2d.cur.xmin || node->totr.xmin > ar->v2d.cur.xmax ||
        node->totr.ymax < ar->v2d.cur.ymin || node->totr.ymin > ar->v2d.cur.ymax) {
      UI_block_end(C, node->block);
      node->block = NULL;
      return;
    }
  
    /* XXX only kept for debugging
     * selection state is indicated by socket outline below!
     */
  #if 0
    float size = NODE_REROUTE_SIZE;
  
    /* body */
    float debug_color[4];
    UI_draw_roundbox_corner_set(UI_CNR_ALL);
    UI_GetThemeColor4fv(TH_NODE, debug_color);
    UI_draw_roundbox_aa(true, rct->xmin, rct->ymin, rct->xmax, rct->ymax, size, debug_color);
  
    /* outline active and selected emphasis */
    if (node->flag & SELECT) {
      GPU_blend(true);
      GPU_line_smooth(true);
      /* using different shades of TH_TEXT_HI for the empasis, like triangle */
      if (node->flag & NODE_ACTIVE) {
        UI_GetThemeColorShadeAlpha4fv(TH_TEXT_HI, 0, -40, debug_color);
      }
      else {
        UI_GetThemeColorShadeAlpha4fv(TH_TEXT_HI, -20, -120, debug_color);
      }
      UI_draw_roundbox_4fv(false, rct->xmin, rct->ymin, rct->xmax, rct->ymax, size, debug_color);
  
      GPU_line_smooth(false);
      GPU_blend(false);
    }
  #endif
  
    if (node->label[0] != '\0') {
      /* draw title (node label) */
      BLI_strncpy(showname, node->label, sizeof(showname));
      uiDefBut(node->block,
               UI_BTYPE_LABEL,
               0,
               showname,
               (int)(rct->xmin - NODE_DYS),
               (int)(rct->ymax),
               (short)512,
               (short)NODE_DY,
               NULL,
               0,
               0,
               0,
               0,
               NULL);
    }
  
    /* only draw input socket. as they all are placed on the same position.
     * highlight also if node itself is selected, since we don't display the node body separately!
     */
    node_draw_sockets(&ar->v2d, C, ntree, node, false, node->flag & SELECT);
  
    UI_block_end(C, node->block);
    UI_block_draw(C, node->block);
    node->block = NULL;
  }
  
  /* Special tweak area for reroute node.
   * Since this node is quite small, we use a larger tweak area for grabbing than for selection.
   */
  static int node_tweak_area_reroute(bNode *node, int x, int y)
  {
    /* square of tweak radius */
    const float tweak_radius_sq = SQUARE(24);
  
    bNodeSocket *sock = node->inputs.first;
    float dx = sock->locx - x;
    float dy = sock->locy - y;
    return (dx * dx + dy * dy <= tweak_radius_sq);
  }
  
  static void node_common_set_butfunc(bNodeType *ntype)
  {
    switch (ntype->type) {
      case NODE_GROUP:
        ntype->draw_buttons = node_draw_buttons_group;
        break;
      case NODE_FRAME:
        ntype->draw_nodetype = node_draw_frame;
        ntype->draw_nodetype_prepare = node_draw_frame_prepare;
        ntype->draw_buttons_ex = node_buts_frame_ex;
        ntype->resize_area_func = node_resize_area_frame;
        break;
      case NODE_REROUTE:
        ntype->draw_nodetype = node_draw_reroute;
        ntype->draw_nodetype_prepare = node_draw_reroute_prepare;
        ntype->tweak_area_func = node_tweak_area_reroute;
        break;
    }
  }
  
  /* ****************** BUTTON CALLBACKS FOR SHADER NODES ***************** */
  
  static void node_buts_image_user(uiLayout *layout,
                                   bContext *C,
                                   PointerRNA *ptr,
                                   PointerRNA *imaptr,
                                   PointerRNA *iuserptr,
                                   bool compositor)
  {
    uiLayout *col;
    int source;
  
    if (!imaptr->data) {
      return;
    }
  
    col = uiLayoutColumn(layout, false);
  
    uiItemR(col, imaptr, "source", 0, "", ICON_NONE);
  
    source = RNA_enum_get(imaptr, "source");
  
    if (source == IMA_SRC_SEQUENCE) {
      /* don't use iuser->framenr directly
       * because it may not be updated if auto-refresh is off */
      Scene *scene = CTX_data_scene(C);
      ImageUser *iuser = iuserptr->data;
      /* Image *ima = imaptr->data; */ /* UNUSED */
  
      char numstr[32];
      const int framenr = BKE_image_user_frame_get(iuser, CFRA, NULL);
      BLI_snprintf(numstr, sizeof(numstr), IFACE_("Frame: %d"), framenr);
      uiItemL(layout, numstr, ICON_NONE);
    }
  
    if (ELEM(source, IMA_SRC_SEQUENCE, IMA_SRC_MOVIE)) {
      col = uiLayoutColumn(layout, true);
      uiItemR(col, ptr, "frame_duration", 0, NULL, ICON_NONE);
      uiItemR(col, ptr, "frame_start", 0, NULL, ICON_NONE);
      uiItemR(col, ptr, "frame_offset", 0, NULL, ICON_NONE);
      uiItemR(col, ptr, "use_cyclic", 0, NULL, ICON_NONE);
      uiItemR(col, ptr, "use_auto_refresh", 0, NULL, ICON_NONE);
    }
  
    if (compositor && RNA_enum_get(imaptr, "type") == IMA_TYPE_MULTILAYER &&
        RNA_boolean_get(ptr, "has_layers")) {
      col = uiLayoutColumn(layout, false);
      uiItemR(col, ptr, "layer", 0, NULL, ICON_NONE);
    }
  
    uiLayout *split = uiLayoutSplit(layout, 0.5f, true);
    PointerRNA colorspace_settings_ptr = RNA_pointer_get(imaptr, "colorspace_settings");
    uiItemL(split, IFACE_("Color Space"), ICON_NONE);
    uiItemR(split, &colorspace_settings_ptr, "name", 0, "", ICON_NONE);
  
    /* Avoid losing changes image is painted. */
    if (BKE_image_is_dirty(imaptr->data)) {
      uiLayoutSetEnabled(split, false);
    }
  }
  
  static void node_shader_buts_mapping(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "vector_type", 0, NULL, ICON_NONE);
  }
  
  static void node_shader_buts_vect_math(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "operation", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_vect_transform(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "vector_type", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
    uiItemR(layout, ptr, "convert_from", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "convert_to", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_attribute(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "attribute_name", 0, IFACE_("Name"), ICON_NONE);
  }
  
  static void node_shader_buts_wireframe(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "use_pixel_size", 0, NULL, 0);
  }
  
  static void node_shader_buts_tex_image(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    PointerRNA imaptr = RNA_pointer_get(ptr, "image");
    PointerRNA iuserptr = RNA_pointer_get(ptr, "image_user");
  
    uiLayoutSetContextPointer(layout, "image_user", &iuserptr);
    uiTemplateID(layout,
                 C,
                 ptr,
                 "image",
                 "IMAGE_OT_new",
                 "IMAGE_OT_open",
                 NULL,
                 UI_TEMPLATE_ID_FILTER_ALL,
                 false,
                 NULL);
    uiItemR(layout, ptr, "interpolation", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "projection", 0, "", ICON_NONE);
  
    if (RNA_enum_get(ptr, "projection") == SHD_PROJ_BOX) {
      uiItemR(layout, ptr, "projection_blend", 0, "Blend", ICON_NONE);
    }
  
    uiItemR(layout, ptr, "extension", 0, "", ICON_NONE);
  
    /* note: image user properties used directly here, unlike compositor image node,
     * which redefines them in the node struct RNA to get proper updates.
     */
    node_buts_image_user(layout, C, &iuserptr, &imaptr, &iuserptr, false);
  }
  
  static void node_shader_buts_tex_image_ex(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    PointerRNA iuserptr = RNA_pointer_get(ptr, "image_user");
    uiTemplateImage(layout, C, ptr, "image", &iuserptr, 0, 0);
  }
  
  static void node_shader_buts_tex_environment(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    PointerRNA imaptr = RNA_pointer_get(ptr, "image");
    PointerRNA iuserptr = RNA_pointer_get(ptr, "image_user");
  
    uiLayoutSetContextPointer(layout, "image_user", &iuserptr);
    uiTemplateID(layout,
                 C,
                 ptr,
                 "image",
                 "IMAGE_OT_new",
                 "IMAGE_OT_open",
                 NULL,
                 UI_TEMPLATE_ID_FILTER_ALL,
                 false,
                 NULL);
  
    uiItemR(layout, ptr, "interpolation", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "projection", 0, "", ICON_NONE);
  
    node_buts_image_user(layout, C, &iuserptr, &imaptr, &iuserptr, false);
  }
  
  static void node_shader_buts_tex_environment_ex(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    PointerRNA iuserptr = RNA_pointer_get(ptr, "image_user");
    uiTemplateImage(layout, C, ptr, "image", &iuserptr, 0, 0);
  
    uiItemR(layout, ptr, "interpolation", 0, IFACE_("Interpolation"), ICON_NONE);
    uiItemR(layout, ptr, "projection", 0, IFACE_("Projection"), ICON_NONE);
  }
  
  static void node_shader_buts_tex_sky(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "sky_type", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "sun_direction", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "turbidity", 0, NULL, ICON_NONE);
  
    if (RNA_enum_get(ptr, "sky_type") == SHD_SKY_NEW) {
      uiItemR(layout, ptr, "ground_albedo", 0, NULL, ICON_NONE);
    }
  }
  
  static void node_shader_buts_tex_gradient(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "gradient_type", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_tex_magic(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "turbulence_depth", 0, NULL, ICON_NONE);
  }
  
  static void node_shader_buts_tex_brick(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "offset", UI_ITEM_R_SLIDER, IFACE_("Offset"), ICON_NONE);
    uiItemR(col, ptr, "offset_frequency", 0, IFACE_("Frequency"), ICON_NONE);
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "squash", 0, IFACE_("Squash"), ICON_NONE);
    uiItemR(col, ptr, "squash_frequency", 0, IFACE_("Frequency"), ICON_NONE);
  }
  
  static void node_shader_buts_tex_wave(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "wave_type", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "wave_profile", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_tex_musgrave(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "musgrave_dimensions", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "musgrave_type", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_tex_voronoi(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "voronoi_dimensions", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "feature", 0, "", ICON_NONE);
    int feature = RNA_enum_get(ptr, "feature");
    if (!ELEM(feature, SHD_VORONOI_DISTANCE_TO_EDGE, SHD_VORONOI_N_SPHERE_RADIUS) &&
        RNA_enum_get(ptr, "voronoi_dimensions") != 1) {
      uiItemR(layout, ptr, "distance", 0, "", ICON_NONE);
    }
  }
  
  static void node_shader_buts_tex_noise(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "noise_dimensions", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_tex_pointdensity(uiLayout *layout,
                                                bContext *UNUSED(C),
                                                PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    NodeShaderTexPointDensity *shader_point_density = node->storage;
    Object *ob = (Object *)node->id;
    PointerRNA ob_ptr, obdata_ptr;
  
    RNA_id_pointer_create((ID *)ob, &ob_ptr);
    RNA_id_pointer_create(ob ? (ID *)ob->data : NULL, &obdata_ptr);
  
    uiItemR(layout, ptr, "point_source", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
    uiItemR(layout, ptr, "object", 0, NULL, ICON_NONE);
  
    if (node->id && shader_point_density->point_source == SHD_POINTDENSITY_SOURCE_PSYS) {
      PointerRNA dataptr;
      RNA_id_pointer_create((ID *)node->id, &dataptr);
      uiItemPointerR(layout, ptr, "particle_system", &dataptr, "particle_systems", NULL, ICON_NONE);
    }
  
    uiItemR(layout, ptr, "space", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "radius", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "interpolation", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "resolution", 0, NULL, ICON_NONE);
    if (shader_point_density->point_source == SHD_POINTDENSITY_SOURCE_PSYS) {
      uiItemR(layout, ptr, "particle_color_source", 0, NULL, ICON_NONE);
    }
    else {
      uiItemR(layout, ptr, "vertex_color_source", 0, NULL, ICON_NONE);
      if (shader_point_density->ob_color_source == SHD_POINTDENSITY_COLOR_VERTWEIGHT) {
        if (ob_ptr.data) {
          uiItemPointerR(
              layout, ptr, "vertex_attribute_name", &ob_ptr, "vertex_groups", "", ICON_NONE);
        }
      }
      if (shader_point_density->ob_color_source == SHD_POINTDENSITY_COLOR_VERTCOL) {
        if (obdata_ptr.data) {
          uiItemPointerR(
              layout, ptr, "vertex_attribute_name", &obdata_ptr, "vertex_colors", "", ICON_NONE);
        }
      }
    }
  }
  
  static void node_shader_buts_tex_coord(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "object", 0, NULL, 0);
    uiItemR(layout, ptr, "from_instancer", 0, NULL, 0);
  }
  
  static void node_shader_buts_bump(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "invert", 0, NULL, 0);
  }
  
  static void node_shader_buts_uvmap(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "from_instancer", 0, NULL, 0);
  
    if (!RNA_boolean_get(ptr, "from_instancer")) {
      PointerRNA obptr = CTX_data_pointer_get(C, "active_object");
  
      if (obptr.data && RNA_enum_get(&obptr, "type") == OB_MESH) {
        PointerRNA dataptr = RNA_pointer_get(&obptr, "data");
        uiItemPointerR(layout, ptr, "uv_map", &dataptr, "uv_layers", "", ICON_NONE);
      }
    }
  }
  
  static void node_shader_buts_vertex_color(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    PointerRNA obptr = CTX_data_pointer_get(C, "active_object");
    if (obptr.data && RNA_enum_get(&obptr, "type") == OB_MESH) {
      PointerRNA dataptr = RNA_pointer_get(&obptr, "data");
      uiItemPointerR(layout, ptr, "layer_name", &dataptr, "vertex_colors", "", ICON_GROUP_VCOL);
    }
    else {
      uiItemL(layout, "No mesh in active object.", ICON_ERROR);
    }
  }
  
  static void node_shader_buts_uvalongstroke(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "use_tips", 0, NULL, 0);
  }
  
  static void node_shader_buts_normal_map(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "space", 0, "", 0);
  
    if (RNA_enum_get(ptr, "space") == SHD_SPACE_TANGENT) {
      PointerRNA obptr = CTX_data_pointer_get(C, "active_object");
  
      if (obptr.data && RNA_enum_get(&obptr, "type") == OB_MESH) {
        PointerRNA dataptr = RNA_pointer_get(&obptr, "data");
        uiItemPointerR(layout, ptr, "uv_map", &dataptr, "uv_layers", "", ICON_NONE);
      }
      else {
        uiItemR(layout, ptr, "uv_map", 0, "", 0);
      }
    }
  }
  
  static void node_shader_buts_displacement(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "space", 0, "", 0);
  }
  
  static void node_shader_buts_tangent(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    uiLayout *split, *row;
  
    split = uiLayoutSplit(layout, 0.0f, false);
  
    uiItemR(split, ptr, "direction_type", 0, "", 0);
  
    row = uiLayoutRow(split, false);
  
    if (RNA_enum_get(ptr, "direction_type") == SHD_TANGENT_UVMAP) {
      PointerRNA obptr = CTX_data_pointer_get(C, "active_object");
  
      if (obptr.data && RNA_enum_get(&obptr, "type") == OB_MESH) {
        PointerRNA dataptr = RNA_pointer_get(&obptr, "data");
        uiItemPointerR(row, ptr, "uv_map", &dataptr, "uv_layers", "", ICON_NONE);
      }
      else {
        uiItemR(row, ptr, "uv_map", 0, "", 0);
      }
    }
    else {
      uiItemR(row, ptr, "axis", UI_ITEM_R_EXPAND, NULL, 0);
    }
  }
  
  static void node_shader_buts_glossy(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "distribution", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_principled(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "distribution", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "subsurface_method", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_anisotropic(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "distribution", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_subsurface(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "falloff", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_toon(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "component", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_hair(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "component", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_principled_hair(uiLayout *layout,
                                               bContext *UNUSED(C),
                                               PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "parametrization", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_ies(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *row;
  
    row = uiLayoutRow(layout, false);
    uiItemR(row, ptr, "mode", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
  
    row = uiLayoutRow(layout, true);
  
    if (RNA_enum_get(ptr, "mode") == NODE_IES_INTERNAL) {
      uiItemR(row, ptr, "ies", 0, "", ICON_NONE);
    }
    else {
      uiItemR(row, ptr, "filepath", 0, "", ICON_NONE);
    }
  }
  
  static void node_shader_buts_script(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *row;
  
    row = uiLayoutRow(layout, false);
    uiItemR(row, ptr, "mode", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
  
    row = uiLayoutRow(layout, true);
  
    if (RNA_enum_get(ptr, "mode") == NODE_SCRIPT_INTERNAL) {
      uiItemR(row, ptr, "script", 0, "", ICON_NONE);
    }
    else {
      uiItemR(row, ptr, "filepath", 0, "", ICON_NONE);
    }
  
    uiItemO(row, "", ICON_FILE_REFRESH, "node.shader_script_update");
  }
  
  static void node_shader_buts_script_ex(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    uiItemS(layout);
  
    node_shader_buts_script(layout, C, ptr);
  
  #if 0 /* not implemented yet */
    if (RNA_enum_get(ptr, "mode") == NODE_SCRIPT_EXTERNAL) {
      uiItemR(layout, ptr, "use_auto_update", 0, NULL, ICON_NONE);
    }
  #endif
  }
  
  static void node_buts_output_shader(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "target", 0, "", ICON_NONE);
  }
  
  static void node_buts_output_linestyle(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *row, *col;
  
    col = uiLayoutColumn(layout, false);
    row = uiLayoutRow(col, true);
    uiItemR(row, ptr, "blend_type", 0, "", ICON_NONE);
    uiItemR(col, ptr, "use_clamp", 0, NULL, ICON_NONE);
  }
  
  static void node_shader_buts_bevel(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "samples", 0, NULL, ICON_NONE);
  }
  
  static void node_shader_buts_ambient_occlusion(uiLayout *layout,
                                                 bContext *UNUSED(C),
                                                 PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "samples", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "inside", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "only_local", 0, NULL, ICON_NONE);
  }
  
  static void node_shader_buts_white_noise(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "noise_dimensions", 0, "", ICON_NONE);
  }
  
  static void node_shader_buts_output_aov(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "name", 0, NULL, ICON_NONE);
  }
  
  /* only once called */
  static void node_shader_set_butfunc(bNodeType *ntype)
  {
    switch (ntype->type) {
      case SH_NODE_NORMAL:
        ntype->draw_buttons = node_buts_normal;
        break;
      case SH_NODE_CURVE_VEC:
        ntype->draw_buttons = node_buts_curvevec;
        break;
      case SH_NODE_CURVE_RGB:
        ntype->draw_buttons = node_buts_curvecol;
        break;
      case SH_NODE_MAPPING:
        ntype->draw_buttons = node_shader_buts_mapping;
        break;
      case SH_NODE_VALUE:
        ntype->draw_buttons = node_buts_value;
        break;
      case SH_NODE_RGB:
        ntype->draw_buttons = node_buts_rgb;
        break;
      case SH_NODE_MIX_RGB:
        ntype->draw_buttons = node_buts_mix_rgb;
        break;
      case SH_NODE_VALTORGB:
        ntype->draw_buttons = node_buts_colorramp;
        break;
      case SH_NODE_CLAMP:
        ntype->draw_buttons = node_shader_buts_clamp;
        break;
      case SH_NODE_MAP_RANGE:
        ntype->draw_buttons = node_shader_buts_map_range;
        break;
      case SH_NODE_MATH:
        ntype->draw_buttons = node_buts_math;
        break;
      case SH_NODE_VECTOR_MATH:
        ntype->draw_buttons = node_shader_buts_vect_math;
        break;
      case SH_NODE_VECT_TRANSFORM:
        ntype->draw_buttons = node_shader_buts_vect_transform;
        break;
      case SH_NODE_ATTRIBUTE:
        ntype->draw_buttons = node_shader_buts_attribute;
        break;
      case SH_NODE_WIREFRAME:
        ntype->draw_buttons = node_shader_buts_wireframe;
        break;
      case SH_NODE_TEX_SKY:
        ntype->draw_buttons = node_shader_buts_tex_sky;
        break;
      case SH_NODE_TEX_IMAGE:
        ntype->draw_buttons = node_shader_buts_tex_image;
        ntype->draw_buttons_ex = node_shader_buts_tex_image_ex;
        break;
      case SH_NODE_TEX_ENVIRONMENT:
        ntype->draw_buttons = node_shader_buts_tex_environment;
        ntype->draw_buttons_ex = node_shader_buts_tex_environment_ex;
        break;
      case SH_NODE_TEX_GRADIENT:
        ntype->draw_buttons = node_shader_buts_tex_gradient;
        break;
      case SH_NODE_TEX_MAGIC:
        ntype->draw_buttons = node_shader_buts_tex_magic;
        break;
      case SH_NODE_TEX_BRICK:
        ntype->draw_buttons = node_shader_buts_tex_brick;
        break;
      case SH_NODE_TEX_WAVE:
        ntype->draw_buttons = node_shader_buts_tex_wave;
        break;
      case SH_NODE_TEX_MUSGRAVE:
        ntype->draw_buttons = node_shader_buts_tex_musgrave;
        break;
      case SH_NODE_TEX_VORONOI:
        ntype->draw_buttons = node_shader_buts_tex_voronoi;
        break;
      case SH_NODE_TEX_NOISE:
        ntype->draw_buttons = node_shader_buts_tex_noise;
        break;
      case SH_NODE_TEX_POINTDENSITY:
        ntype->draw_buttons = node_shader_buts_tex_pointdensity;
        break;
      case SH_NODE_TEX_COORD:
        ntype->draw_buttons = node_shader_buts_tex_coord;
        break;
      case SH_NODE_BUMP:
        ntype->draw_buttons = node_shader_buts_bump;
        break;
      case SH_NODE_NORMAL_MAP:
        ntype->draw_buttons = node_shader_buts_normal_map;
        break;
      case SH_NODE_DISPLACEMENT:
      case SH_NODE_VECTOR_DISPLACEMENT:
        ntype->draw_buttons = node_shader_buts_displacement;
        break;
      case SH_NODE_TANGENT:
        ntype->draw_buttons = node_shader_buts_tangent;
        break;
      case SH_NODE_BSDF_GLOSSY:
      case SH_NODE_BSDF_GLASS:
      case SH_NODE_BSDF_REFRACTION:
        ntype->draw_buttons = node_shader_buts_glossy;
        break;
      case SH_NODE_BSDF_PRINCIPLED:
        ntype->draw_buttons = node_shader_buts_principled;
        break;
      case SH_NODE_BSDF_ANISOTROPIC:
        ntype->draw_buttons = node_shader_buts_anisotropic;
        break;
      case SH_NODE_SUBSURFACE_SCATTERING:
        ntype->draw_buttons = node_shader_buts_subsurface;
        break;
      case SH_NODE_BSDF_TOON:
        ntype->draw_buttons = node_shader_buts_toon;
        break;
      case SH_NODE_BSDF_HAIR:
        ntype->draw_buttons = node_shader_buts_hair;
        break;
      case SH_NODE_BSDF_HAIR_PRINCIPLED:
        ntype->draw_buttons = node_shader_buts_principled_hair;
        break;
      case SH_NODE_SCRIPT:
        ntype->draw_buttons = node_shader_buts_script;
        ntype->draw_buttons_ex = node_shader_buts_script_ex;
        break;
      case SH_NODE_UVMAP:
        ntype->draw_buttons = node_shader_buts_uvmap;
        break;
      case SH_NODE_VERTEX_COLOR:
        ntype->draw_buttons = node_shader_buts_vertex_color;
        break;
      case SH_NODE_UVALONGSTROKE:
        ntype->draw_buttons = node_shader_buts_uvalongstroke;
        break;
      case SH_NODE_OUTPUT_MATERIAL:
      case SH_NODE_OUTPUT_LIGHT:
      case SH_NODE_OUTPUT_WORLD:
        ntype->draw_buttons = node_buts_output_shader;
        break;
      case SH_NODE_OUTPUT_LINESTYLE:
        ntype->draw_buttons = node_buts_output_linestyle;
        break;
      case SH_NODE_TEX_IES:
        ntype->draw_buttons = node_shader_buts_ies;
        break;
      case SH_NODE_BEVEL:
        ntype->draw_buttons = node_shader_buts_bevel;
        break;
      case SH_NODE_AMBIENT_OCCLUSION:
        ntype->draw_buttons = node_shader_buts_ambient_occlusion;
        break;
      case SH_NODE_TEX_WHITE_NOISE:
        ntype->draw_buttons = node_shader_buts_white_noise;
        break;
      case SH_NODE_OUTPUT_AOV:
        ntype->draw_buttons = node_shader_buts_output_aov;
        break;
    }
  }
  
  /* ****************** BUTTON CALLBACKS FOR COMPOSITE NODES ***************** */
  
  static void node_buts_image_views(uiLayout *layout,
                                    bContext *UNUSED(C),
                                    PointerRNA *ptr,
                                    PointerRNA *imaptr)
  {
    uiLayout *col;
  
    if (!imaptr->data) {
      return;
    }
  
    col = uiLayoutColumn(layout, false);
  
    if (RNA_boolean_get(ptr, "has_views")) {
      if (RNA_enum_get(ptr, "view") == 0) {
        uiItemR(col, ptr, "view", 0, NULL, ICON_CAMERA_STEREO);
      }
      else {
        uiItemR(col, ptr, "view", 0, NULL, ICON_SCENE);
      }
    }
  }
  
  static void node_composit_buts_image(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    PointerRNA imaptr, iuserptr;
  
    RNA_pointer_create(ptr->owner_id, &RNA_ImageUser, node->storage, &iuserptr);
    uiLayoutSetContextPointer(layout, "image_user", &iuserptr);
    uiTemplateID(layout,
                 C,
                 ptr,
                 "image",
                 "IMAGE_OT_new",
                 "IMAGE_OT_open",
                 NULL,
                 UI_TEMPLATE_ID_FILTER_ALL,
                 false,
                 NULL);
    if (!node->id) {
      return;
    }
  
    imaptr = RNA_pointer_get(ptr, "image");
  
    node_buts_image_user(layout, C, ptr, &imaptr, &iuserptr, true);
  
    node_buts_image_views(layout, C, ptr, &imaptr);
  }
  
  static void node_composit_buts_image_ex(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    PointerRNA iuserptr;
  
    RNA_pointer_create(ptr->owner_id, &RNA_ImageUser, node->storage, &iuserptr);
    uiLayoutSetContextPointer(layout, "image_user", &iuserptr);
    uiTemplateImage(layout, C, ptr, "image", &iuserptr, 0, 1);
  }
  
  static void node_composit_buts_viewlayers(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    uiLayout *col, *row;
    PointerRNA op_ptr;
    PointerRNA scn_ptr;
    PropertyRNA *prop;
    const char *layer_name;
    char scene_name[MAX_ID_NAME - 2];
  
    uiTemplateID(layout, C, ptr, "scene", NULL, NULL, NULL, UI_TEMPLATE_ID_FILTER_ALL, false, NULL);
  
    if (!node->id) {
      return;
    }
  
    col = uiLayoutColumn(layout, false);
    row = uiLayoutRow(col, true);
    uiItemR(row, ptr, "layer", 0, "", ICON_NONE);
  
    prop = RNA_struct_find_property(ptr, "layer");
    if (!(RNA_property_enum_identifier(
            C, ptr, prop, RNA_property_enum_get(ptr, prop), &layer_name))) {
      return;
    }
  
    scn_ptr = RNA_pointer_get(ptr, "scene");
    RNA_string_get(&scn_ptr, "name", scene_name);
  
    uiItemFullO(
        row, "RENDER_OT_render", "", ICON_RENDER_STILL, NULL, WM_OP_INVOKE_DEFAULT, 0, &op_ptr);
    RNA_string_set(&op_ptr, "layer", layer_name);
    RNA_string_set(&op_ptr, "scene", scene_name);
  }
  
  static void node_composit_buts_blur(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col, *row;
    int reference;
    int filter;
  
    col = uiLayoutColumn(layout, false);
    filter = RNA_enum_get(ptr, "filter_type");
    reference = RNA_boolean_get(ptr, "use_variable_size");
  
    uiItemR(col, ptr, "filter_type", 0, "", ICON_NONE);
    if (filter != R_FILTER_FAST_GAUSS) {
      uiItemR(col, ptr, "use_variable_size", 0, NULL, ICON_NONE);
      if (!reference) {
        uiItemR(col, ptr, "use_bokeh", 0, NULL, ICON_NONE);
      }
      uiItemR(col, ptr, "use_gamma_correction", 0, NULL, ICON_NONE);
    }
  
    uiItemR(col, ptr, "use_relative", 0, NULL, ICON_NONE);
  
    if (RNA_boolean_get(ptr, "use_relative")) {
      uiItemL(col, IFACE_("Aspect Correction"), ICON_NONE);
      row = uiLayoutRow(layout, true);
      uiItemR(row, ptr, "aspect_correction", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
  
      col = uiLayoutColumn(layout, true);
      uiItemR(col, ptr, "factor_x", 0, IFACE_("X"), ICON_NONE);
      uiItemR(col, ptr, "factor_y", 0, IFACE_("Y"), ICON_NONE);
    }
    else {
      col = uiLayoutColumn(layout, true);
      uiItemR(col, ptr, "size_x", 0, IFACE_("X"), ICON_NONE);
      uiItemR(col, ptr, "size_y", 0, IFACE_("Y"), ICON_NONE);
    }
    uiItemR(col, ptr, "use_extended_bounds", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_dblur(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    uiItemR(layout, ptr, "iterations", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "use_wrap", 0, NULL, ICON_NONE);
  
    col = uiLayoutColumn(layout, true);
    uiItemL(col, IFACE_("Center:"), ICON_NONE);
    uiItemR(col, ptr, "center_x", 0, IFACE_("X"), ICON_NONE);
    uiItemR(col, ptr, "center_y", 0, IFACE_("Y"), ICON_NONE);
  
    uiItemS(layout);
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "distance", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "angle", 0, NULL, ICON_NONE);
  
    uiItemS(layout);
  
    uiItemR(layout, ptr, "spin", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "zoom", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_bilateralblur(uiLayout *layout,
                                               bContext *UNUSED(C),
                                               PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "iterations", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "sigma_color", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "sigma_space", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_defocus(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    uiLayout *sub, *col;
  
    col = uiLayoutColumn(layout, false);
    uiItemL(col, IFACE_("Bokeh Type:"), ICON_NONE);
    uiItemR(col, ptr, "bokeh", 0, "", ICON_NONE);
    uiItemR(col, ptr, "angle", 0, NULL, ICON_NONE);
  
    uiItemR(layout, ptr, "use_gamma_correction", 0, NULL, ICON_NONE);
  
    col = uiLayoutColumn(layout, false);
    uiLayoutSetActive(col, RNA_boolean_get(ptr, "use_zbuffer") == true);
    uiItemR(col, ptr, "f_stop", 0, NULL, ICON_NONE);
  
    uiItemR(layout, ptr, "blur_max", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "threshold", 0, NULL, ICON_NONE);
  
    col = uiLayoutColumn(layout, false);
    uiItemR(col, ptr, "use_preview", 0, NULL, ICON_NONE);
  
    uiTemplateID(layout, C, ptr, "scene", NULL, NULL, NULL, UI_TEMPLATE_ID_FILTER_ALL, false, NULL);
  
    col = uiLayoutColumn(layout, false);
    uiItemR(col, ptr, "use_zbuffer", 0, NULL, ICON_NONE);
    sub = uiLayoutColumn(col, false);
    uiLayoutSetActive(sub, RNA_boolean_get(ptr, "use_zbuffer") == false);
    uiItemR(sub, ptr, "z_scale", 0, NULL, ICON_NONE);
  }
  
  /* qdn: glare node */
  static void node_composit_buts_glare(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "glare_type", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "quality", 0, "", ICON_NONE);
  
    if (RNA_enum_get(ptr, "glare_type") != 1) {
      uiItemR(layout, ptr, "iterations", 0, NULL, ICON_NONE);
  
      if (RNA_enum_get(ptr, "glare_type") != 0) {
        uiItemR(layout, ptr, "color_modulation", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
      }
    }
  
    uiItemR(layout, ptr, "mix", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "threshold", 0, NULL, ICON_NONE);
  
    if (RNA_enum_get(ptr, "glare_type") == 2) {
      uiItemR(layout, ptr, "streaks", 0, NULL, ICON_NONE);
      uiItemR(layout, ptr, "angle_offset", 0, NULL, ICON_NONE);
    }
    if (RNA_enum_get(ptr, "glare_type") == 0 || RNA_enum_get(ptr, "glare_type") == 2) {
      uiItemR(layout, ptr, "fade", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  
      if (RNA_enum_get(ptr, "glare_type") == 0) {
        uiItemR(layout, ptr, "use_rotate_45", 0, NULL, ICON_NONE);
      }
    }
    if (RNA_enum_get(ptr, "glare_type") == 1) {
      uiItemR(layout, ptr, "size", 0, NULL, ICON_NONE);
    }
  }
  
  static void node_composit_buts_tonemap(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, false);
    uiItemR(col, ptr, "tonemap_type", 0, "", ICON_NONE);
    if (RNA_enum_get(ptr, "tonemap_type") == 0) {
      uiItemR(col, ptr, "key", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
      uiItemR(col, ptr, "offset", 0, NULL, ICON_NONE);
      uiItemR(col, ptr, "gamma", 0, NULL, ICON_NONE);
    }
    else {
      uiItemR(col, ptr, "intensity", 0, NULL, ICON_NONE);
      uiItemR(col, ptr, "contrast", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
      uiItemR(col, ptr, "adaptation", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
      uiItemR(col, ptr, "correction", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    }
  }
  
  static void node_composit_buts_lensdist(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, false);
    uiItemR(col, ptr, "use_projector", 0, NULL, ICON_NONE);
  
    col = uiLayoutColumn(col, false);
    uiLayoutSetActive(col, RNA_boolean_get(ptr, "use_projector") == false);
    uiItemR(col, ptr, "use_jitter", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "use_fit", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_vecblur(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, false);
    uiItemR(col, ptr, "samples", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "factor", 0, IFACE_("Blur"), ICON_NONE);
  
    col = uiLayoutColumn(layout, true);
    uiItemL(col, IFACE_("Speed:"), ICON_NONE);
    uiItemR(col, ptr, "speed_min", 0, IFACE_("Min"), ICON_NONE);
    uiItemR(col, ptr, "speed_max", 0, IFACE_("Max"), ICON_NONE);
  
    uiItemR(layout, ptr, "use_curved", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_filter(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "filter_type", 0, "", ICON_NONE);
  }
  
  static void node_composit_buts_flip(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "axis", 0, "", ICON_NONE);
  }
  
  static void node_composit_buts_crop(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    uiItemR(layout, ptr, "use_crop_size", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "relative", 0, NULL, ICON_NONE);
  
    col = uiLayoutColumn(layout, true);
    if (RNA_boolean_get(ptr, "relative")) {
      uiItemR(col, ptr, "rel_min_x", 0, IFACE_("Left"), ICON_NONE);
      uiItemR(col, ptr, "rel_max_x", 0, IFACE_("Right"), ICON_NONE);
      uiItemR(col, ptr, "rel_min_y", 0, IFACE_("Up"), ICON_NONE);
      uiItemR(col, ptr, "rel_max_y", 0, IFACE_("Down"), ICON_NONE);
    }
    else {
      uiItemR(col, ptr, "min_x", 0, IFACE_("Left"), ICON_NONE);
      uiItemR(col, ptr, "max_x", 0, IFACE_("Right"), ICON_NONE);
      uiItemR(col, ptr, "min_y", 0, IFACE_("Up"), ICON_NONE);
      uiItemR(col, ptr, "max_y", 0, IFACE_("Down"), ICON_NONE);
    }
  }
  
  static void node_composit_buts_splitviewer(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *row, *col;
  
    col = uiLayoutColumn(layout, false);
    row = uiLayoutRow(col, false);
    uiItemR(row, ptr, "axis", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
    uiItemR(col, ptr, "factor", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_double_edge_mask(uiLayout *layout,
                                                  bContext *UNUSED(C),
                                                  PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, false);
  
    uiItemL(col, IFACE_("Inner Edge:"), ICON_NONE);
    uiItemR(col, ptr, "inner_mode", 0, "", ICON_NONE);
    uiItemL(col, IFACE_("Buffer Edge:"), ICON_NONE);
    uiItemR(col, ptr, "edge_mode", 0, "", ICON_NONE);
  }
  
  static void node_composit_buts_map_range(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "use_clamp", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_map_value(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *sub, *col;
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "offset", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "size", 0, NULL, ICON_NONE);
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "use_min", 0, NULL, ICON_NONE);
    sub = uiLayoutColumn(col, false);
    uiLayoutSetActive(sub, RNA_boolean_get(ptr, "use_min"));
    uiItemR(sub, ptr, "min", 0, "", ICON_NONE);
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "use_max", 0, NULL, ICON_NONE);
    sub = uiLayoutColumn(col, false);
    uiLayoutSetActive(sub, RNA_boolean_get(ptr, "use_max"));
    uiItemR(sub, ptr, "max", 0, "", ICON_NONE);
  }
  
  static void node_composit_buts_alphaover(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "use_premultiply", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "premul", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_zcombine(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "use_alpha", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "use_antialias_z", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_dilateerode(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "mode", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "distance", 0, NULL, ICON_NONE);
    switch (RNA_enum_get(ptr, "mode")) {
      case CMP_NODE_DILATEERODE_DISTANCE_THRESH:
        uiItemR(layout, ptr, "edge", 0, NULL, ICON_NONE);
        break;
      case CMP_NODE_DILATEERODE_DISTANCE_FEATHER:
        uiItemR(layout, ptr, "falloff", 0, NULL, ICON_NONE);
        break;
    }
  }
  
  static void node_composit_buts_inpaint(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "distance", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_despeckle(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, false);
    uiItemR(col, ptr, "threshold", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "threshold_neighbor", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_diff_matte(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "tolerance", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(col, ptr, "falloff", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_distance_matte(uiLayout *layout,
                                                bContext *UNUSED(C),
                                                PointerRNA *ptr)
  {
    uiLayout *col, *row;
  
    col = uiLayoutColumn(layout, true);
  
    uiItemL(layout, IFACE_("Color Space:"), ICON_NONE);
    row = uiLayoutRow(layout, false);
    uiItemR(row, ptr, "channel", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
  
    uiItemR(col, ptr, "tolerance", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(col, ptr, "falloff", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_color_spill(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *row, *col;
  
    uiItemL(layout, IFACE_("Despill Channel:"), ICON_NONE);
    row = uiLayoutRow(layout, false);
    uiItemR(row, ptr, "channel", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
  
    col = uiLayoutColumn(layout, false);
    uiItemR(col, ptr, "limit_method", 0, NULL, ICON_NONE);
  
    if (RNA_enum_get(ptr, "limit_method") == 0) {
      uiItemL(col, IFACE_("Limiting Channel:"), ICON_NONE);
      row = uiLayoutRow(col, false);
      uiItemR(row, ptr, "limit_channel", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
    }
  
    uiItemR(col, ptr, "ratio", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(col, ptr, "use_unspill", 0, NULL, ICON_NONE);
    if (RNA_boolean_get(ptr, "use_unspill") == true) {
      uiItemR(col, ptr, "unspill_red", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
      uiItemR(col, ptr, "unspill_green", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
      uiItemR(col, ptr, "unspill_blue", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    }
  }
  
  static void node_composit_buts_chroma_matte(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, false);
    uiItemR(col, ptr, "tolerance", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "threshold", 0, NULL, ICON_NONE);
  
    col = uiLayoutColumn(layout, true);
    /*uiItemR(col, ptr, "lift", UI_ITEM_R_SLIDER, NULL, ICON_NONE);  Removed for now */
    uiItemR(col, ptr, "gain", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    /*uiItemR(col, ptr, "shadow_adjust", UI_ITEM_R_SLIDER, NULL, ICON_NONE);  Removed for now*/
  }
  
  static void node_composit_buts_color_matte(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "color_hue", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(col, ptr, "color_saturation", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(col, ptr, "color_value", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_channel_matte(uiLayout *layout,
                                               bContext *UNUSED(C),
                                               PointerRNA *ptr)
  {
    uiLayout *col, *row;
  
    uiItemL(layout, IFACE_("Color Space:"), ICON_NONE);
    row = uiLayoutRow(layout, false);
    uiItemR(row, ptr, "color_space", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
  
    col = uiLayoutColumn(layout, false);
    uiItemL(col, IFACE_("Key Channel:"), ICON_NONE);
    row = uiLayoutRow(col, false);
    uiItemR(row, ptr, "matte_channel", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
  
    col = uiLayoutColumn(layout, false);
  
    uiItemR(col, ptr, "limit_method", 0, NULL, ICON_NONE);
    if (RNA_enum_get(ptr, "limit_method") == 0) {
      uiItemL(col, IFACE_("Limiting Channel:"), ICON_NONE);
      row = uiLayoutRow(col, false);
      uiItemR(row, ptr, "limit_channel", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
    }
  
    uiItemR(col, ptr, "limit_max", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(col, ptr, "limit_min", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_luma_matte(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "limit_max", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(col, ptr, "limit_min", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_map_uv(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "alpha", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_id_mask(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "index", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "use_antialiasing", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_file_output(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    PointerRNA imfptr = RNA_pointer_get(ptr, "format");
    const bool multilayer = RNA_enum_get(&imfptr, "file_format") == R_IMF_IMTYPE_MULTILAYER;
  
    if (multilayer) {
      uiItemL(layout, IFACE_("Path:"), ICON_NONE);
    }
    else {
      uiItemL(layout, IFACE_("Base Path:"), ICON_NONE);
    }
    uiItemR(layout, ptr, "base_path", 0, "", ICON_NONE);
  }
  static void node_composit_buts_file_output_ex(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    Scene *scene = CTX_data_scene(C);
    PointerRNA imfptr = RNA_pointer_get(ptr, "format");
    PointerRNA active_input_ptr, op_ptr;
    wmOperatorType *ot;
    uiLayout *row, *col;
    int active_index;
    const bool multilayer = RNA_enum_get(&imfptr, "file_format") == R_IMF_IMTYPE_MULTILAYER;
    const bool is_multiview = (scene->r.scemode & R_MULTIVIEW) != 0;
  
    node_composit_buts_file_output(layout, C, ptr);
    uiTemplateImageSettings(layout, &imfptr, false);
  
    /* disable stereo output for multilayer, too much work for something that no one will use */
    /* if someone asks for that we can implement it */
    if (is_multiview) {
      uiTemplateImageFormatViews(layout, &imfptr, NULL);
    }
  
    uiItemS(layout);
  
    uiItemO(layout, IFACE_("Add Input"), ICON_ADD, "NODE_OT_output_file_add_socket");
  
    row = uiLayoutRow(layout, false);
    col = uiLayoutColumn(row, true);
  
    active_index = RNA_int_get(ptr, "active_input_index");
    /* using different collection properties if multilayer format is enabled */
    if (multilayer) {
      uiTemplateList(col,
                     C,
                     "UI_UL_list",
                     "file_output_node",
                     ptr,
                     "layer_slots",
                     ptr,
                     "active_input_index",
                     NULL,
                     0,
                     0,
                     0,
                     0,
                     false,
                     false);
      RNA_property_collection_lookup_int(
          ptr, RNA_struct_find_property(ptr, "layer_slots"), active_index, &active_input_ptr);
    }
    else {
      uiTemplateList(col,
                     C,
                     "UI_UL_list",
                     "file_output_node",
                     ptr,
                     "file_slots",
                     ptr,
                     "active_input_index",
                     NULL,
                     0,
                     0,
                     0,
                     0,
                     false,
                     false);
      RNA_property_collection_lookup_int(
          ptr, RNA_struct_find_property(ptr, "file_slots"), active_index, &active_input_ptr);
    }
    /* XXX collection lookup does not return the ID part of the pointer,
     * setting this manually here */
    active_input_ptr.owner_id = ptr->owner_id;
  
    col = uiLayoutColumn(row, true);
    ot = WM_operatortype_find("NODE_OT_output_file_move_active_socket", false);
    uiItemFullO_ptr(col, ot, "", ICON_TRIA_UP, NULL, WM_OP_INVOKE_DEFAULT, 0, &op_ptr);
    RNA_enum_set(&op_ptr, "direction", 1);
    uiItemFullO_ptr(col, ot, "", ICON_TRIA_DOWN, NULL, WM_OP_INVOKE_DEFAULT, 0, &op_ptr);
    RNA_enum_set(&op_ptr, "direction", 2);
  
    if (active_input_ptr.data) {
      if (multilayer) {
        col = uiLayoutColumn(layout, true);
  
        uiItemL(col, IFACE_("Layer:"), ICON_NONE);
        row = uiLayoutRow(col, false);
        uiItemR(row, &active_input_ptr, "name", 0, "", ICON_NONE);
        uiItemFullO(row,
                    "NODE_OT_output_file_remove_active_socket",
                    "",
                    ICON_X,
                    NULL,
                    WM_OP_EXEC_DEFAULT,
                    UI_ITEM_R_ICON_ONLY,
                    NULL);
      }
      else {
        col = uiLayoutColumn(layout, true);
  
        uiItemL(col, IFACE_("File Subpath:"), ICON_NONE);
        row = uiLayoutRow(col, false);
        uiItemR(row, &active_input_ptr, "path", 0, "", ICON_NONE);
        uiItemFullO(row,
                    "NODE_OT_output_file_remove_active_socket",
                    "",
                    ICON_X,
                    NULL,
                    WM_OP_EXEC_DEFAULT,
                    UI_ITEM_R_ICON_ONLY,
                    NULL);
  
        /* format details for individual files */
        imfptr = RNA_pointer_get(&active_input_ptr, "format");
  
        col = uiLayoutColumn(layout, true);
        uiItemL(col, IFACE_("Format:"), ICON_NONE);
        uiItemR(col, &active_input_ptr, "use_node_format", 0, NULL, ICON_NONE);
  
        col = uiLayoutColumn(layout, false);
        uiLayoutSetActive(col, RNA_boolean_get(&active_input_ptr, "use_node_format") == false);
        uiTemplateImageSettings(col, &imfptr, false);
  
        if (is_multiview) {
          uiTemplateImageFormatViews(layout, &imfptr, NULL);
        }
      }
    }
  }
  
  static void node_composit_buts_scale(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "space", 0, "", ICON_NONE);
  
    if (RNA_enum_get(ptr, "space") == CMP_SCALE_RENDERPERCENT) {
      uiLayout *row;
      uiItemR(layout, ptr, "frame_method", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
      row = uiLayoutRow(layout, true);
      uiItemR(row, ptr, "offset_x", 0, "X", ICON_NONE);
      uiItemR(row, ptr, "offset_y", 0, "Y", ICON_NONE);
    }
  }
  
  static void node_composit_buts_rotate(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "filter_type", 0, "", ICON_NONE);
  }
  
  static void node_composit_buts_invert(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, false);
    uiItemR(col, ptr, "invert_rgb", 0, NULL, ICON_NONE);
    uiItemR(col, ptr, "invert_alpha", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_premulkey(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "mapping", 0, "", ICON_NONE);
  }
  
  static void node_composit_buts_view_levels(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "channel", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_colorbalance(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *split, *col, *row;
  
    uiItemR(layout, ptr, "correction_method", 0, NULL, ICON_NONE);
  
    if (RNA_enum_get(ptr, "correction_method") == 0) {
  
      split = uiLayoutSplit(layout, 0.0f, false);
      col = uiLayoutColumn(split, false);
      uiTemplateColorPicker(col, ptr, "lift", 1, 1, 0, 1);
      row = uiLayoutRow(col, false);
      uiItemR(row, ptr, "lift", 0, NULL, ICON_NONE);
  
      col = uiLayoutColumn(split, false);
      uiTemplateColorPicker(col, ptr, "gamma", 1, 1, 1, 1);
      row = uiLayoutRow(col, false);
      uiItemR(row, ptr, "gamma", 0, NULL, ICON_NONE);
  
      col = uiLayoutColumn(split, false);
      uiTemplateColorPicker(col, ptr, "gain", 1, 1, 1, 1);
      row = uiLayoutRow(col, false);
      uiItemR(row, ptr, "gain", 0, NULL, ICON_NONE);
    }
    else {
  
      split = uiLayoutSplit(layout, 0.0f, false);
      col = uiLayoutColumn(split, false);
      uiTemplateColorPicker(col, ptr, "offset", 1, 1, 0, 1);
      row = uiLayoutRow(col, false);
      uiItemR(row, ptr, "offset", 0, NULL, ICON_NONE);
      uiItemR(col, ptr, "offset_basis", 0, NULL, ICON_NONE);
  
      col = uiLayoutColumn(split, false);
      uiTemplateColorPicker(col, ptr, "power", 1, 1, 0, 1);
      row = uiLayoutRow(col, false);
      uiItemR(row, ptr, "power", 0, NULL, ICON_NONE);
  
      col = uiLayoutColumn(split, false);
      uiTemplateColorPicker(col, ptr, "slope", 1, 1, 0, 1);
      row = uiLayoutRow(col, false);
      uiItemR(row, ptr, "slope", 0, NULL, ICON_NONE);
    }
  }
  static void node_composit_buts_colorbalance_ex(uiLayout *layout,
                                                 bContext *UNUSED(C),
                                                 PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "correction_method", 0, NULL, ICON_NONE);
  
    if (RNA_enum_get(ptr, "correction_method") == 0) {
  
      uiTemplateColorPicker(layout, ptr, "lift", 1, 1, 0, 1);
      uiItemR(layout, ptr, "lift", 0, NULL, ICON_NONE);
  
      uiTemplateColorPicker(layout, ptr, "gamma", 1, 1, 1, 1);
      uiItemR(layout, ptr, "gamma", 0, NULL, ICON_NONE);
  
      uiTemplateColorPicker(layout, ptr, "gain", 1, 1, 1, 1);
      uiItemR(layout, ptr, "gain", 0, NULL, ICON_NONE);
    }
    else {
      uiTemplateColorPicker(layout, ptr, "offset", 1, 1, 0, 1);
      uiItemR(layout, ptr, "offset", 0, NULL, ICON_NONE);
  
      uiTemplateColorPicker(layout, ptr, "power", 1, 1, 0, 1);
      uiItemR(layout, ptr, "power", 0, NULL, ICON_NONE);
  
      uiTemplateColorPicker(layout, ptr, "slope", 1, 1, 0, 1);
      uiItemR(layout, ptr, "slope", 0, NULL, ICON_NONE);
    }
  }
  
  static void node_composit_buts_huecorrect(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    CurveMapping *cumap = node->storage;
  
    if (_sample_col[0] != SAMPLE_FLT_ISNONE) {
      cumap->flag |= CUMA_DRAW_SAMPLE;
      copy_v3_v3(cumap->sample, _sample_col);
    }
    else {
      cumap->flag &= ~CUMA_DRAW_SAMPLE;
    }
  
    uiTemplateCurveMapping(layout, ptr, "mapping", 'h', false, false, false, false);
  }
  
  static void node_composit_buts_ycc(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "mode", 0, "", ICON_NONE);
  }
  
  static void node_composit_buts_movieclip(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    uiTemplateID(
        layout, C, ptr, "clip", NULL, "CLIP_OT_open", NULL, UI_TEMPLATE_ID_FILTER_ALL, false, NULL);
  }
  
  static void node_composit_buts_movieclip_ex(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    PointerRNA clipptr;
  
    uiTemplateID(
        layout, C, ptr, "clip", NULL, "CLIP_OT_open", NULL, UI_TEMPLATE_ID_FILTER_ALL, false, NULL);
  
    if (!node->id) {
      return;
    }
  
    clipptr = RNA_pointer_get(ptr, "clip");
  
    uiTemplateColorspaceSettings(layout, &clipptr, "colorspace_settings");
  }
  
  static void node_composit_buts_stabilize2d(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
  
    uiTemplateID(
        layout, C, ptr, "clip", NULL, "CLIP_OT_open", NULL, UI_TEMPLATE_ID_FILTER_ALL, false, NULL);
  
    if (!node->id) {
      return;
    }
  
    uiItemR(layout, ptr, "filter_type", 0, "", ICON_NONE);
    uiItemR(layout, ptr, "invert", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_translate(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "use_relative", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "wrap_axis", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_transform(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "filter_type", 0, "", ICON_NONE);
  }
  
  static void node_composit_buts_moviedistortion(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
  
    uiTemplateID(
        layout, C, ptr, "clip", NULL, "CLIP_OT_open", NULL, UI_TEMPLATE_ID_FILTER_ALL, false, NULL);
  
    if (!node->id) {
      return;
    }
  
    uiItemR(layout, ptr, "distortion_type", 0, "", ICON_NONE);
  }
  
  static void node_composit_buts_colorcorrection(uiLayout *layout,
                                                 bContext *UNUSED(C),
                                                 PointerRNA *ptr)
  {
    uiLayout *row;
  
    row = uiLayoutRow(layout, false);
    uiItemR(row, ptr, "red", 0, NULL, ICON_NONE);
    uiItemR(row, ptr, "green", 0, NULL, ICON_NONE);
    uiItemR(row, ptr, "blue", 0, NULL, ICON_NONE);
  
    row = uiLayoutRow(layout, false);
    uiItemL(row, "", ICON_NONE);
    uiItemL(row, IFACE_("Saturation"), ICON_NONE);
    uiItemL(row, IFACE_("Contrast"), ICON_NONE);
    uiItemL(row, IFACE_("Gamma"), ICON_NONE);
    uiItemL(row, IFACE_("Gain"), ICON_NONE);
    uiItemL(row, IFACE_("Lift"), ICON_NONE);
  
    row = uiLayoutRow(layout, false);
    uiItemL(row, IFACE_("Master"), ICON_NONE);
    uiItemR(row, ptr, "master_saturation", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "master_contrast", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "master_gamma", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "master_gain", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "master_lift", UI_ITEM_R_SLIDER, "", ICON_NONE);
  
    row = uiLayoutRow(layout, false);
    uiItemL(row, IFACE_("Highlights"), ICON_NONE);
    uiItemR(row, ptr, "highlights_saturation", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "highlights_contrast", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "highlights_gamma", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "highlights_gain", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "highlights_lift", UI_ITEM_R_SLIDER, "", ICON_NONE);
  
    row = uiLayoutRow(layout, false);
    uiItemL(row, IFACE_("Midtones"), ICON_NONE);
    uiItemR(row, ptr, "midtones_saturation", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "midtones_contrast", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "midtones_gamma", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "midtones_gain", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "midtones_lift", UI_ITEM_R_SLIDER, "", ICON_NONE);
  
    row = uiLayoutRow(layout, false);
    uiItemL(row, IFACE_("Shadows"), ICON_NONE);
    uiItemR(row, ptr, "shadows_saturation", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "shadows_contrast", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "shadows_gamma", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "shadows_gain", UI_ITEM_R_SLIDER, "", ICON_NONE);
    uiItemR(row, ptr, "shadows_lift", UI_ITEM_R_SLIDER, "", ICON_NONE);
  
    row = uiLayoutRow(layout, false);
    uiItemR(row, ptr, "midtones_start", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "midtones_end", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_colorcorrection_ex(uiLayout *layout,
                                                    bContext *UNUSED(C),
                                                    PointerRNA *ptr)
  {
    uiLayout *row;
  
    row = uiLayoutRow(layout, false);
    uiItemR(row, ptr, "red", 0, NULL, ICON_NONE);
    uiItemR(row, ptr, "green", 0, NULL, ICON_NONE);
    uiItemR(row, ptr, "blue", 0, NULL, ICON_NONE);
    row = layout;
    uiItemL(row, IFACE_("Saturation"), ICON_NONE);
    uiItemR(row, ptr, "master_saturation", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "highlights_saturation", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "midtones_saturation", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "shadows_saturation", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  
    uiItemL(row, IFACE_("Contrast"), ICON_NONE);
    uiItemR(row, ptr, "master_contrast", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "highlights_contrast", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "midtones_contrast", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "shadows_contrast", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  
    uiItemL(row, IFACE_("Gamma"), ICON_NONE);
    uiItemR(row, ptr, "master_gamma", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "highlights_gamma", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "midtones_gamma", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "shadows_gamma", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  
    uiItemL(row, IFACE_("Gain"), ICON_NONE);
    uiItemR(row, ptr, "master_gain", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "highlights_gain", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "midtones_gain", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "shadows_gain", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  
    uiItemL(row, IFACE_("Lift"), ICON_NONE);
    uiItemR(row, ptr, "master_lift", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "highlights_lift", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "midtones_lift", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "shadows_lift", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  
    row = uiLayoutRow(layout, false);
    uiItemR(row, ptr, "midtones_start", 0, NULL, ICON_NONE);
    uiItemR(row, ptr, "midtones_end", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_switch(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "check", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_switch_view_ex(uiLayout *layout,
                                                bContext *UNUSED(C),
                                                PointerRNA *UNUSED(ptr))
  {
    uiItemFullO(layout,
                "NODE_OT_switch_view_update",
                "Update Views",
                ICON_FILE_REFRESH,
                NULL,
                WM_OP_INVOKE_DEFAULT,
                0,
                NULL);
  }
  
  static void node_composit_buts_boxmask(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *row;
  
    row = uiLayoutRow(layout, true);
    uiItemR(row, ptr, "x", 0, NULL, ICON_NONE);
    uiItemR(row, ptr, "y", 0, NULL, ICON_NONE);
  
    row = uiLayoutRow(layout, true);
    uiItemR(row, ptr, "width", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "height", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  
    uiItemR(layout, ptr, "rotation", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "mask_type", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_bokehimage(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "flaps", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "angle", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "rounding", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(layout, ptr, "catadioptric", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(layout, ptr, "shift", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_bokehblur(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "use_variable_size", 0, NULL, ICON_NONE);
    // uiItemR(layout, ptr, "f_stop", 0, NULL, ICON_NONE);  // UNUSED
    uiItemR(layout, ptr, "blur_max", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "use_extended_bounds", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_backdrop_viewer(
      SpaceNode *snode, ImBuf *backdrop, bNode *node, int x, int y)
  {
    //  node_composit_backdrop_canvas(snode, backdrop, node, x, y);
    if (node->custom1 == 0) {
      const float backdropWidth = backdrop->x;
      const float backdropHeight = backdrop->y;
      const float cx = x + snode->zoom * backdropWidth * node->custom3;
      const float cy = y + snode->zoom * backdropHeight * node->custom4;
      const float cross_size = 12 * U.pixelsize;
  
      GPUVertFormat *format = immVertexFormat();
      uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
  
      immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
  
      immUniformColor3f(1.0f, 1.0f, 1.0f);
  
      immBegin(GPU_PRIM_LINES, 4);
      immVertex2f(pos, cx - cross_size, cy - cross_size);
      immVertex2f(pos, cx + cross_size, cy + cross_size);
      immVertex2f(pos, cx + cross_size, cy - cross_size);
      immVertex2f(pos, cx - cross_size, cy + cross_size);
      immEnd();
  
      immUnbindProgram();
    }
  }
  
  static void node_composit_backdrop_boxmask(
      SpaceNode *snode, ImBuf *backdrop, bNode *node, int x, int y)
  {
    NodeBoxMask *boxmask = node->storage;
    const float backdropWidth = backdrop->x;
    const float backdropHeight = backdrop->y;
    const float aspect = backdropWidth / backdropHeight;
    const float rad = -boxmask->rotation;
    const float cosine = cosf(rad);
    const float sine = sinf(rad);
    const float halveBoxWidth = backdropWidth * (boxmask->width / 2.0f);
    const float halveBoxHeight = backdropHeight * (boxmask->height / 2.0f) * aspect;
  
    float cx, cy, x1, x2, x3, x4;
    float y1, y2, y3, y4;
  
    cx = x + snode->zoom * backdropWidth * boxmask->x;
    cy = y + snode->zoom * backdropHeight * boxmask->y;
  
    x1 = cx - (cosine * halveBoxWidth + sine * halveBoxHeight) * snode->zoom;
    x2 = cx - (cosine * -halveBoxWidth + sine * halveBoxHeight) * snode->zoom;
    x3 = cx - (cosine * -halveBoxWidth + sine * -halveBoxHeight) * snode->zoom;
    x4 = cx - (cosine * halveBoxWidth + sine * -halveBoxHeight) * snode->zoom;
    y1 = cy - (-sine * halveBoxWidth + cosine * halveBoxHeight) * snode->zoom;
    y2 = cy - (-sine * -halveBoxWidth + cosine * halveBoxHeight) * snode->zoom;
    y3 = cy - (-sine * -halveBoxWidth + cosine * -halveBoxHeight) * snode->zoom;
    y4 = cy - (-sine * halveBoxWidth + cosine * -halveBoxHeight) * snode->zoom;
  
    GPUVertFormat *format = immVertexFormat();
    uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
  
    immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
  
    immUniformColor3f(1.0f, 1.0f, 1.0f);
  
    immBegin(GPU_PRIM_LINE_LOOP, 4);
    immVertex2f(pos, x1, y1);
    immVertex2f(pos, x2, y2);
    immVertex2f(pos, x3, y3);
    immVertex2f(pos, x4, y4);
    immEnd();
  
    immUnbindProgram();
  }
  
  static void node_composit_backdrop_ellipsemask(
      SpaceNode *snode, ImBuf *backdrop, bNode *node, int x, int y)
  {
    NodeEllipseMask *ellipsemask = node->storage;
    const float backdropWidth = backdrop->x;
    const float backdropHeight = backdrop->y;
    const float aspect = backdropWidth / backdropHeight;
    const float rad = -ellipsemask->rotation;
    const float cosine = cosf(rad);
    const float sine = sinf(rad);
    const float halveBoxWidth = backdropWidth * (ellipsemask->width / 2.0f);
    const float halveBoxHeight = backdropHeight * (ellipsemask->height / 2.0f) * aspect;
  
    float cx, cy, x1, x2, x3, x4;
    float y1, y2, y3, y4;
  
    cx = x + snode->zoom * backdropWidth * ellipsemask->x;
    cy = y + snode->zoom * backdropHeight * ellipsemask->y;
  
    x1 = cx - (cosine * halveBoxWidth + sine * halveBoxHeight) * snode->zoom;
    x2 = cx - (cosine * -halveBoxWidth + sine * halveBoxHeight) * snode->zoom;
    x3 = cx - (cosine * -halveBoxWidth + sine * -halveBoxHeight) * snode->zoom;
    x4 = cx - (cosine * halveBoxWidth + sine * -halveBoxHeight) * snode->zoom;
    y1 = cy - (-sine * halveBoxWidth + cosine * halveBoxHeight) * snode->zoom;
    y2 = cy - (-sine * -halveBoxWidth + cosine * halveBoxHeight) * snode->zoom;
    y3 = cy - (-sine * -halveBoxWidth + cosine * -halveBoxHeight) * snode->zoom;
    y4 = cy - (-sine * halveBoxWidth + cosine * -halveBoxHeight) * snode->zoom;
  
    GPUVertFormat *format = immVertexFormat();
    uint pos = GPU_vertformat_attr_add(format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
  
    immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
  
    immUniformColor3f(1.0f, 1.0f, 1.0f);
  
    immBegin(GPU_PRIM_LINE_LOOP, 4);
    immVertex2f(pos, x1, y1);
    immVertex2f(pos, x2, y2);
    immVertex2f(pos, x3, y3);
    immVertex2f(pos, x4, y4);
    immEnd();
  
    immUnbindProgram();
  }
  
  static void node_composit_buts_ellipsemask(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *row;
    row = uiLayoutRow(layout, true);
    uiItemR(row, ptr, "x", 0, NULL, ICON_NONE);
    uiItemR(row, ptr, "y", 0, NULL, ICON_NONE);
    row = uiLayoutRow(layout, true);
    uiItemR(row, ptr, "width", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
    uiItemR(row, ptr, "height", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  
    uiItemR(layout, ptr, "rotation", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "mask_type", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_composite(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "use_alpha", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_viewer(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "use_alpha", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_viewer_ex(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    uiItemR(layout, ptr, "use_alpha", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "tile_order", 0, NULL, ICON_NONE);
    if (RNA_enum_get(ptr, "tile_order") == 0) {
      col = uiLayoutColumn(layout, true);
      uiItemR(col, ptr, "center_x", 0, NULL, ICON_NONE);
      uiItemR(col, ptr, "center_y", 0, NULL, ICON_NONE);
    }
  }
  
  static void node_composit_buts_mask(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
  
    uiTemplateID(layout, C, ptr, "mask", NULL, NULL, NULL, UI_TEMPLATE_ID_FILTER_ALL, false, NULL);
    uiItemR(layout, ptr, "use_feather", 0, NULL, ICON_NONE);
  
    uiItemR(layout, ptr, "size_source", 0, "", ICON_NONE);
  
    if (node->custom1 & (CMP_NODEFLAG_MASK_FIXED | CMP_NODEFLAG_MASK_FIXED_SCENE)) {
      uiItemR(layout, ptr, "size_x", 0, NULL, ICON_NONE);
      uiItemR(layout, ptr, "size_y", 0, NULL, ICON_NONE);
    }
  
    uiItemR(layout, ptr, "use_motion_blur", 0, NULL, ICON_NONE);
    if (node->custom1 & CMP_NODEFLAG_MASK_MOTION_BLUR) {
      uiItemR(layout, ptr, "motion_blur_samples", 0, NULL, ICON_NONE);
      uiItemR(layout, ptr, "motion_blur_shutter", 0, NULL, ICON_NONE);
    }
  }
  
  static void node_composit_buts_keyingscreen(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
  
    uiTemplateID(layout, C, ptr, "clip", NULL, NULL, NULL, UI_TEMPLATE_ID_FILTER_ALL, false, NULL);
  
    if (node->id) {
      MovieClip *clip = (MovieClip *)node->id;
      uiLayout *col;
      PointerRNA tracking_ptr;
  
      RNA_pointer_create(&clip->id, &RNA_MovieTracking, &clip->tracking, &tracking_ptr);
  
      col = uiLayoutColumn(layout, true);
      uiItemPointerR(col, ptr, "tracking_object", &tracking_ptr, "objects", "", ICON_OBJECT_DATA);
    }
  }
  
  static void node_composit_buts_keying(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    /* bNode *node = ptr->data; */ /* UNUSED */
  
    uiItemR(layout, ptr, "blur_pre", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "screen_balance", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "despill_factor", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "despill_balance", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "edge_kernel_radius", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "edge_kernel_tolerance", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "clip_black", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "clip_white", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "dilate_distance", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "feather_falloff", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "feather_distance", 0, NULL, ICON_NONE);
    uiItemR(layout, ptr, "blur_post", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_trackpos(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
  
    uiTemplateID(
        layout, C, ptr, "clip", NULL, "CLIP_OT_open", NULL, UI_TEMPLATE_ID_FILTER_ALL, false, NULL);
  
    if (node->id) {
      MovieClip *clip = (MovieClip *)node->id;
      MovieTracking *tracking = &clip->tracking;
      MovieTrackingObject *object;
      uiLayout *col;
      PointerRNA tracking_ptr;
      NodeTrackPosData *data = node->storage;
  
      RNA_pointer_create(&clip->id, &RNA_MovieTracking, tracking, &tracking_ptr);
  
      col = uiLayoutColumn(layout, false);
      uiItemPointerR(col, ptr, "tracking_object", &tracking_ptr, "objects", "", ICON_OBJECT_DATA);
  
      object = BKE_tracking_object_get_named(tracking, data->tracking_object);
      if (object) {
        PointerRNA object_ptr;
  
        RNA_pointer_create(&clip->id, &RNA_MovieTrackingObject, object, &object_ptr);
  
        uiItemPointerR(col, ptr, "track_name", &object_ptr, "tracks", "", ICON_ANIM_DATA);
      }
      else {
        uiItemR(layout, ptr, "track_name", 0, "", ICON_ANIM_DATA);
      }
  
      uiItemR(layout, ptr, "position", 0, NULL, ICON_NONE);
  
      if (ELEM(node->custom1, CMP_TRACKPOS_RELATIVE_FRAME, CMP_TRACKPOS_ABSOLUTE_FRAME)) {
        uiItemR(layout, ptr, "frame_relative", 0, NULL, ICON_NONE);
      }
    }
  }
  
  static void node_composit_buts_planetrackdeform(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    NodePlaneTrackDeformData *data = node->storage;
  
    uiTemplateID(
        layout, C, ptr, "clip", NULL, "CLIP_OT_open", NULL, UI_TEMPLATE_ID_FILTER_ALL, false, NULL);
  
    if (node->id) {
      MovieClip *clip = (MovieClip *)node->id;
      MovieTracking *tracking = &clip->tracking;
      MovieTrackingObject *object;
      uiLayout *col;
      PointerRNA tracking_ptr;
  
      RNA_pointer_create(&clip->id, &RNA_MovieTracking, tracking, &tracking_ptr);
  
      col = uiLayoutColumn(layout, false);
      uiItemPointerR(col, ptr, "tracking_object", &tracking_ptr, "objects", "", ICON_OBJECT_DATA);
  
      object = BKE_tracking_object_get_named(tracking, data->tracking_object);
      if (object) {
        PointerRNA object_ptr;
  
        RNA_pointer_create(&clip->id, &RNA_MovieTrackingObject, object, &object_ptr);
  
        uiItemPointerR(
            col, ptr, "plane_track_name", &object_ptr, "plane_tracks", "", ICON_ANIM_DATA);
      }
      else {
        uiItemR(layout, ptr, "plane_track_name", 0, "", ICON_ANIM_DATA);
      }
    }
  
    uiItemR(layout, ptr, "use_motion_blur", 0, NULL, ICON_NONE);
    if (data->flag & CMP_NODEFLAG_PLANETRACKDEFORM_MOTION_BLUR) {
      uiItemR(layout, ptr, "motion_blur_samples", 0, NULL, ICON_NONE);
      uiItemR(layout, ptr, "motion_blur_shutter", 0, NULL, ICON_NONE);
    }
  }
  
  static void node_composit_buts_cornerpin(uiLayout *UNUSED(layout),
                                           bContext *UNUSED(C),
                                           PointerRNA *UNUSED(ptr))
  {
  }
  
  static void node_composit_buts_sunbeams(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "source", UI_ITEM_R_EXPAND, "", ICON_NONE);
    uiItemR(layout, ptr, "ray_length", UI_ITEM_R_SLIDER, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_cryptomatte(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col = uiLayoutColumn(layout, true);
  
    uiItemL(col, IFACE_("Matte Objects:"), ICON_NONE);
  
    uiLayout *row = uiLayoutRow(col, true);
    uiTemplateCryptoPicker(row, ptr, "add");
    uiTemplateCryptoPicker(row, ptr, "remove");
  
    uiItemR(col, ptr, "matte_id", 0, "", ICON_NONE);
  }
  
  static void node_composit_buts_cryptomatte_ex(uiLayout *layout,
                                                bContext *UNUSED(C),
                                                PointerRNA *UNUSED(ptr))
  {
    uiItemO(layout, IFACE_("Add Crypto Layer"), ICON_ADD, "NODE_OT_cryptomatte_layer_add");
    uiItemO(layout, IFACE_("Remove Crypto Layer"), ICON_REMOVE, "NODE_OT_cryptomatte_layer_remove");
  }
  
  static void node_composit_buts_brightcontrast(uiLayout *layout,
                                                bContext *UNUSED(C),
                                                PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "use_premultiply", 0, NULL, ICON_NONE);
  }
  
  static void node_composit_buts_denoise(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
  #ifndef WITH_OPENIMAGEDENOISE
    uiItemL(layout, IFACE_("Disabled, built without OpenImageDenoise"), ICON_ERROR);
  #else
    if (!BLI_cpu_support_sse41()) {
      uiItemL(layout, IFACE_("Disabled, CPU with SSE4.1 is required"), ICON_ERROR);
    }
  #endif
  
    uiItemR(layout, ptr, "use_hdr", 0, NULL, ICON_NONE);
  }
  
  /* only once called */
  static void node_composit_set_butfunc(bNodeType *ntype)
  {
    switch (ntype->type) {
      case CMP_NODE_IMAGE:
        ntype->draw_buttons = node_composit_buts_image;
        ntype->draw_buttons_ex = node_composit_buts_image_ex;
        break;
      case CMP_NODE_R_LAYERS:
        ntype->draw_buttons = node_composit_buts_viewlayers;
        break;
      case CMP_NODE_NORMAL:
        ntype->draw_buttons = node_buts_normal;
        break;
      case CMP_NODE_CURVE_VEC:
        ntype->draw_buttons = node_buts_curvevec;
        break;
      case CMP_NODE_CURVE_RGB:
        ntype->draw_buttons = node_buts_curvecol;
        break;
      case CMP_NODE_VALUE:
        ntype->draw_buttons = node_buts_value;
        break;
      case CMP_NODE_RGB:
        ntype->draw_buttons = node_buts_rgb;
        break;
      case CMP_NODE_FLIP:
        ntype->draw_buttons = node_composit_buts_flip;
        break;
      case CMP_NODE_SPLITVIEWER:
        ntype->draw_buttons = node_composit_buts_splitviewer;
        break;
      case CMP_NODE_MIX_RGB:
        ntype->draw_buttons = node_buts_mix_rgb;
        break;
      case CMP_NODE_VALTORGB:
        ntype->draw_buttons = node_buts_colorramp;
        break;
      case CMP_NODE_CROP:
        ntype->draw_buttons = node_composit_buts_crop;
        break;
      case CMP_NODE_BLUR:
        ntype->draw_buttons = node_composit_buts_blur;
        break;
      case CMP_NODE_DBLUR:
        ntype->draw_buttons = node_composit_buts_dblur;
        break;
      case CMP_NODE_BILATERALBLUR:
        ntype->draw_buttons = node_composit_buts_bilateralblur;
        break;
      case CMP_NODE_DEFOCUS:
        ntype->draw_buttons = node_composit_buts_defocus;
        break;
      case CMP_NODE_GLARE:
        ntype->draw_buttons = node_composit_buts_glare;
        break;
      case CMP_NODE_TONEMAP:
        ntype->draw_buttons = node_composit_buts_tonemap;
        break;
      case CMP_NODE_LENSDIST:
        ntype->draw_buttons = node_composit_buts_lensdist;
        break;
      case CMP_NODE_VECBLUR:
        ntype->draw_buttons = node_composit_buts_vecblur;
        break;
      case CMP_NODE_FILTER:
        ntype->draw_buttons = node_composit_buts_filter;
        break;
      case CMP_NODE_MAP_VALUE:
        ntype->draw_buttons = node_composit_buts_map_value;
        break;
      case CMP_NODE_MAP_RANGE:
        ntype->draw_buttons = node_composit_buts_map_range;
        break;
      case CMP_NODE_TIME:
        ntype->draw_buttons = node_buts_time;
        break;
      case CMP_NODE_ALPHAOVER:
        ntype->draw_buttons = node_composit_buts_alphaover;
        break;
      case CMP_NODE_TEXTURE:
        ntype->draw_buttons = node_buts_texture;
        break;
      case CMP_NODE_DILATEERODE:
        ntype->draw_buttons = node_composit_buts_dilateerode;
        break;
      case CMP_NODE_INPAINT:
        ntype->draw_buttons = node_composit_buts_inpaint;
        break;
      case CMP_NODE_DESPECKLE:
        ntype->draw_buttons = node_composit_buts_despeckle;
        break;
      case CMP_NODE_OUTPUT_FILE:
        ntype->draw_buttons = node_composit_buts_file_output;
        ntype->draw_buttons_ex = node_composit_buts_file_output_ex;
        break;
      case CMP_NODE_DIFF_MATTE:
        ntype->draw_buttons = node_composit_buts_diff_matte;
        break;
      case CMP_NODE_DIST_MATTE:
        ntype->draw_buttons = node_composit_buts_distance_matte;
        break;
      case CMP_NODE_COLOR_SPILL:
        ntype->draw_buttons = node_composit_buts_color_spill;
        break;
      case CMP_NODE_CHROMA_MATTE:
        ntype->draw_buttons = node_composit_buts_chroma_matte;
        break;
      case CMP_NODE_COLOR_MATTE:
        ntype->draw_buttons = node_composit_buts_color_matte;
        break;
      case CMP_NODE_SCALE:
        ntype->draw_buttons = node_composit_buts_scale;
        break;
      case CMP_NODE_ROTATE:
        ntype->draw_buttons = node_composit_buts_rotate;
        break;
      case CMP_NODE_CHANNEL_MATTE:
        ntype->draw_buttons = node_composit_buts_channel_matte;
        break;
      case CMP_NODE_LUMA_MATTE:
        ntype->draw_buttons = node_composit_buts_luma_matte;
        break;
      case CMP_NODE_MAP_UV:
        ntype->draw_buttons = node_composit_buts_map_uv;
        break;
      case CMP_NODE_ID_MASK:
        ntype->draw_buttons = node_composit_buts_id_mask;
        break;
      case CMP_NODE_DOUBLEEDGEMASK:
        ntype->draw_buttons = node_composit_buts_double_edge_mask;
        break;
      case CMP_NODE_MATH:
        ntype->draw_buttons = node_buts_math;
        break;
      case CMP_NODE_INVERT:
        ntype->draw_buttons = node_composit_buts_invert;
        break;
      case CMP_NODE_PREMULKEY:
        ntype->draw_buttons = node_composit_buts_premulkey;
        break;
      case CMP_NODE_VIEW_LEVELS:
        ntype->draw_buttons = node_composit_buts_view_levels;
        break;
      case CMP_NODE_COLORBALANCE:
        ntype->draw_buttons = node_composit_buts_colorbalance;
        ntype->draw_buttons_ex = node_composit_buts_colorbalance_ex;
        break;
      case CMP_NODE_HUECORRECT:
        ntype->draw_buttons = node_composit_buts_huecorrect;
        break;
      case CMP_NODE_ZCOMBINE:
        ntype->draw_buttons = node_composit_buts_zcombine;
        break;
      case CMP_NODE_COMBYCCA:
      case CMP_NODE_SEPYCCA:
        ntype->draw_buttons = node_composit_buts_ycc;
        break;
      case CMP_NODE_MOVIECLIP:
        ntype->draw_buttons = node_composit_buts_movieclip;
        ntype->draw_buttons_ex = node_composit_buts_movieclip_ex;
        break;
      case CMP_NODE_STABILIZE2D:
        ntype->draw_buttons = node_composit_buts_stabilize2d;
        break;
      case CMP_NODE_TRANSFORM:
        ntype->draw_buttons = node_composit_buts_transform;
        break;
      case CMP_NODE_TRANSLATE:
        ntype->draw_buttons = node_composit_buts_translate;
        break;
      case CMP_NODE_MOVIEDISTORTION:
        ntype->draw_buttons = node_composit_buts_moviedistortion;
        break;
      case CMP_NODE_COLORCORRECTION:
        ntype->draw_buttons = node_composit_buts_colorcorrection;
        ntype->draw_buttons_ex = node_composit_buts_colorcorrection_ex;
        break;
      case CMP_NODE_SWITCH:
        ntype->draw_buttons = node_composit_buts_switch;
        break;
      case CMP_NODE_SWITCH_VIEW:
        ntype->draw_buttons_ex = node_composit_buts_switch_view_ex;
        break;
      case CMP_NODE_MASK_BOX:
        ntype->draw_buttons = node_composit_buts_boxmask;
        ntype->draw_backdrop = node_composit_backdrop_boxmask;
        break;
      case CMP_NODE_MASK_ELLIPSE:
        ntype->draw_buttons = node_composit_buts_ellipsemask;
        ntype->draw_backdrop = node_composit_backdrop_ellipsemask;
        break;
      case CMP_NODE_BOKEHIMAGE:
        ntype->draw_buttons = node_composit_buts_bokehimage;
        break;
      case CMP_NODE_BOKEHBLUR:
        ntype->draw_buttons = node_composit_buts_bokehblur;
        break;
      case CMP_NODE_VIEWER:
        ntype->draw_buttons = node_composit_buts_viewer;
        ntype->draw_buttons_ex = node_composit_buts_viewer_ex;
        ntype->draw_backdrop = node_composit_backdrop_viewer;
        break;
      case CMP_NODE_COMPOSITE:
        ntype->draw_buttons = node_composit_buts_composite;
        break;
      case CMP_NODE_MASK:
        ntype->draw_buttons = node_composit_buts_mask;
        break;
      case CMP_NODE_KEYINGSCREEN:
        ntype->draw_buttons = node_composit_buts_keyingscreen;
        break;
      case CMP_NODE_KEYING:
        ntype->draw_buttons = node_composit_buts_keying;
        break;
      case CMP_NODE_TRACKPOS:
        ntype->draw_buttons = node_composit_buts_trackpos;
        break;
      case CMP_NODE_PLANETRACKDEFORM:
        ntype->draw_buttons = node_composit_buts_planetrackdeform;
        break;
      case CMP_NODE_CORNERPIN:
        ntype->draw_buttons = node_composit_buts_cornerpin;
        break;
      case CMP_NODE_SUNBEAMS:
        ntype->draw_buttons = node_composit_buts_sunbeams;
        break;
      case CMP_NODE_CRYPTOMATTE:
        ntype->draw_buttons = node_composit_buts_cryptomatte;
        ntype->draw_buttons_ex = node_composit_buts_cryptomatte_ex;
        break;
      case CMP_NODE_BRIGHTCONTRAST:
        ntype->draw_buttons = node_composit_buts_brightcontrast;
        break;
      case CMP_NODE_DENOISE:
        ntype->draw_buttons = node_composit_buts_denoise;
        break;
    }
  }
  
  /* ****************** BUTTON CALLBACKS FOR TEXTURE NODES ***************** */
  
  static void node_texture_buts_bricks(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiLayout *col;
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "offset", UI_ITEM_R_SLIDER, IFACE_("Offset"), ICON_NONE);
    uiItemR(col, ptr, "offset_frequency", 0, IFACE_("Frequency"), ICON_NONE);
  
    col = uiLayoutColumn(layout, true);
    uiItemR(col, ptr, "squash", 0, IFACE_("Squash"), ICON_NONE);
    uiItemR(col, ptr, "squash_frequency", 0, IFACE_("Frequency"), ICON_NONE);
  }
  
  static void node_texture_buts_proc(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    PointerRNA tex_ptr;
    bNode *node = ptr->data;
    ID *id = ptr->owner_id;
    Tex *tex = (Tex *)node->storage;
    uiLayout *col, *row;
  
    RNA_pointer_create(id, &RNA_Texture, tex, &tex_ptr);
  
    col = uiLayoutColumn(layout, false);
  
    switch (tex->type) {
      case TEX_BLEND:
        uiItemR(col, &tex_ptr, "progression", 0, "", ICON_NONE);
        row = uiLayoutRow(col, false);
        uiItemR(row, &tex_ptr, "use_flip_axis", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
        break;
  
      case TEX_MARBLE:
        row = uiLayoutRow(col, false);
        uiItemR(row, &tex_ptr, "marble_type", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
        row = uiLayoutRow(col, false);
        uiItemR(row, &tex_ptr, "noise_type", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
        row = uiLayoutRow(col, false);
        uiItemR(row, &tex_ptr, "noise_basis", 0, "", ICON_NONE);
        row = uiLayoutRow(col, false);
        uiItemR(row, &tex_ptr, "noise_basis_2", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
        break;
  
      case TEX_MAGIC:
        uiItemR(col, &tex_ptr, "noise_depth", 0, NULL, ICON_NONE);
        break;
  
      case TEX_STUCCI:
        row = uiLayoutRow(col, false);
        uiItemR(row, &tex_ptr, "stucci_type", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
        row = uiLayoutRow(col, false);
        uiItemR(row, &tex_ptr, "noise_type", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
        uiItemR(col, &tex_ptr, "noise_basis", 0, "", ICON_NONE);
        break;
  
      case TEX_WOOD:
        uiItemR(col, &tex_ptr, "noise_basis", 0, "", ICON_NONE);
        uiItemR(col, &tex_ptr, "wood_type", 0, "", ICON_NONE);
        row = uiLayoutRow(col, false);
        uiItemR(row, &tex_ptr, "noise_basis_2", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
        row = uiLayoutRow(col, false);
        uiLayoutSetActive(row, !(ELEM(tex->stype, TEX_BAND, TEX_RING)));
        uiItemR(row, &tex_ptr, "noise_type", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
        break;
  
      case TEX_CLOUDS:
        uiItemR(col, &tex_ptr, "noise_basis", 0, "", ICON_NONE);
        row = uiLayoutRow(col, false);
        uiItemR(row, &tex_ptr, "cloud_type", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
        row = uiLayoutRow(col, false);
        uiItemR(row, &tex_ptr, "noise_type", UI_ITEM_R_EXPAND, NULL, ICON_NONE);
        uiItemR(col, &tex_ptr, "noise_depth", UI_ITEM_R_EXPAND, IFACE_("Depth"), ICON_NONE);
        break;
  
      case TEX_DISTNOISE:
        uiItemR(col, &tex_ptr, "noise_basis", 0, "", ICON_NONE);
        uiItemR(col, &tex_ptr, "noise_distortion", 0, "", ICON_NONE);
        break;
  
      case TEX_MUSGRAVE:
        uiItemR(col, &tex_ptr, "musgrave_type", 0, "", ICON_NONE);
        uiItemR(col, &tex_ptr, "noise_basis", 0, "", ICON_NONE);
        break;
      case TEX_VORONOI:
        uiItemR(col, &tex_ptr, "distance_metric", 0, "", ICON_NONE);
        if (tex->vn_distm == TEX_MINKOVSKY) {
          uiItemR(col, &tex_ptr, "minkovsky_exponent", 0, NULL, ICON_NONE);
        }
        uiItemR(col, &tex_ptr, "color_mode", 0, "", ICON_NONE);
        break;
    }
  }
  
  static void node_texture_buts_image(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    uiTemplateID(layout,
                 C,
                 ptr,
                 "image",
                 "IMAGE_OT_new",
                 "IMAGE_OT_open",
                 NULL,
                 UI_TEMPLATE_ID_FILTER_ALL,
                 false,
                 NULL);
  }
  
  static void node_texture_buts_image_ex(uiLayout *layout, bContext *C, PointerRNA *ptr)
  {
    bNode *node = ptr->data;
    PointerRNA iuserptr;
  
    RNA_pointer_create(ptr->owner_id, &RNA_ImageUser, node->storage, &iuserptr);
    uiTemplateImage(layout, C, ptr, "image", &iuserptr, 0, 0);
  }
  
  static void node_texture_buts_output(uiLayout *layout, bContext *UNUSED(C), PointerRNA *ptr)
  {
    uiItemR(layout, ptr, "filepath", 0, "", ICON_NONE);
  }
  
  /* only once called */
  static void node_texture_set_butfunc(bNodeType *ntype)
  {
    if (ntype->type >= TEX_NODE_PROC && ntype->type < TEX_NODE_PROC_MAX) {
      ntype->draw_buttons = node_texture_buts_proc;
    }
    else {
      switch (ntype->type) {
  
        case TEX_NODE_MATH:
          ntype->draw_buttons = node_buts_math;
          break;
  
        case TEX_NODE_MIX_RGB:
          ntype->draw_buttons = node_buts_mix_rgb;
          break;
  
        case TEX_NODE_VALTORGB:
          ntype->draw_buttons = node_buts_colorramp;
          break;
  
        case TEX_NODE_CURVE_RGB:
          ntype->draw_buttons = node_buts_curvecol;
          break;
  
        case TEX_NODE_CURVE_TIME:
          ntype->draw_buttons = node_buts_time;
          break;
  
        case TEX_NODE_TEXTURE:
          ntype->draw_buttons = node_buts_texture;
          break;
  
        case TEX_NODE_BRICKS:
          ntype->draw_buttons = node_texture_buts_bricks;
          break;
  
        case TEX_NODE_IMAGE:
          ntype->draw_buttons = node_texture_buts_image;
          ntype->draw_buttons_ex = node_texture_buts_image_ex;
          break;
  
        case TEX_NODE_OUTPUT:
          ntype->draw_buttons = node_texture_buts_output;
          break;
      }
    }
  }
  
  /* ****** init draw callbacks for all tree types, only called in usiblender.c, once ************ */
  
  static void node_property_update_default(Main *bmain, Scene *UNUSED(scene), PointerRNA *ptr)
  {
    bNodeTree *ntree = (bNodeTree *)ptr->owner_id;
    bNode *node = ptr->data;
    ED_node_tag_update_nodetree(bmain, ntree, node);
  }
  
  static void node_socket_template_properties_update(bNodeType *ntype, bNodeSocketTemplate *stemp)
  {
    StructRNA *srna = ntype->ext.srna;
    PropertyRNA *prop = RNA_struct_type_find_property(srna, stemp->identifier);
  
    if (prop) {
      RNA_def_property_update_runtime(prop, node_property_update_default);
    }
  }
  
  static void node_template_properties_update(bNodeType *ntype)
  {
    bNodeSocketTemplate *stemp;
  
    if (ntype->inputs) {
      for (stemp = ntype->inputs; stemp->type >= 0; stemp++) {
        node_socket_template_properties_update(ntype, stemp);
      }
    }
    if (ntype->outputs) {
      for (stemp = ntype->outputs; stemp->type >= 0; stemp++) {
        node_socket_template_properties_update(ntype, stemp);
      }
    }
  }
  
  static void node_socket_undefined_draw(bContext *UNUSED(C),
                                         uiLayout *layout,
                                         PointerRNA *UNUSED(ptr),
                                         PointerRNA *UNUSED(node_ptr),
                                         const char *UNUSED(text))
  {
    uiItemL(layout, IFACE_("Undefined Socket Type"), ICON_ERROR);
  }
  
  static void node_socket_undefined_draw_color(bContext *UNUSED(C),
                                               PointerRNA *UNUSED(ptr),
                                               PointerRNA *UNUSED(node_ptr),
                                               float *r_color)
  {
    r_color[0] = 1.0f;
    r_color[1] = 0.0f;
    r_color[2] = 0.0f;
    r_color[3] = 1.0f;
  }
  
  static void node_socket_undefined_interface_draw(bContext *UNUSED(C),
                                                   uiLayout *layout,
                                                   PointerRNA *UNUSED(ptr))
  {
    uiItemL(layout, IFACE_("Undefined Socket Type"), ICON_ERROR);
  }
  
  static void node_socket_undefined_interface_draw_color(bContext *UNUSED(C),
                                                         PointerRNA *UNUSED(ptr),
                                                         float *r_color)
  {
    r_color[0] = 1.0f;
    r_color[1] = 0.0f;
    r_color[2] = 0.0f;
    r_color[3] = 1.0f;
  }
  
  void ED_node_init_butfuncs(void)
  {
    /* Fallback types for undefined tree, nodes, sockets
     * Defined in blenkernel, but not registered in type hashes.
     */
  
    /* default ui functions */
    NodeTypeUndefined.draw_nodetype = node_draw_default;
    NodeTypeUndefined.draw_nodetype_prepare = node_update_default;
    NodeTypeUndefined.select_area_func = node_select_area_default;
    NodeTypeUndefined.tweak_area_func = node_tweak_area_default;
    NodeTypeUndefined.draw_buttons = NULL;
    NodeTypeUndefined.draw_buttons_ex = NULL;
    NodeTypeUndefined.resize_area_func = node_resize_area_default;
  
    NodeSocketTypeUndefined.draw = node_socket_undefined_draw;
    NodeSocketTypeUndefined.draw_color = node_socket_undefined_draw_color;
    NodeSocketTypeUndefined.interface_draw = node_socket_undefined_interface_draw;
    NodeSocketTypeUndefined.interface_draw_color = node_socket_undefined_interface_draw_color;
  
    /* node type ui functions */
    NODE_TYPES_BEGIN (ntype) {
      /* default ui functions */
      ntype->draw_nodetype = node_draw_default;
      ntype->draw_nodetype_prepare = node_update_default;
      ntype->select_area_func = node_select_area_default;
      ntype->tweak_area_func = node_tweak_area_default;
      ntype->draw_buttons = NULL;
      ntype->draw_buttons_ex = NULL;
      ntype->resize_area_func = node_resize_area_default;
  
      node_common_set_butfunc(ntype);
  
      node_composit_set_butfunc(ntype);
      node_shader_set_butfunc(ntype);
      node_texture_set_butfunc(ntype);
  
      /* define update callbacks for socket properties */
      node_template_properties_update(ntype);
    }
    NODE_TYPES_END;
  
    /* tree type icons */
    ntreeType_Composite->ui_icon = ICON_NODE_COMPOSITING;
    ntreeType_Shader->ui_icon = ICON_NODE_MATERIAL;
    ntreeType_Texture->ui_icon = ICON_NODE_TEXTURE;
  }
  
  void ED_init_custom_node_type(bNodeType *ntype)
  {
    /* default ui functions */
    ntype->draw_nodetype = node_draw_default;
    ntype->draw_nodetype_prepare = node_update_default;
    ntype->resize_area_func = node_resize_area_default;
    ntype->select_area_func = node_select_area_default;
    ntype->tweak_area_func = node_tweak_area_default;
  }
  
  void ED_init_custom_node_socket_type(bNodeSocketType *stype)
  {
    /* default ui functions */
    stype->draw = node_socket_button_label;
  }
  
  /* maps standard socket integer type to a color */
  static const float std_node_socket_colors[][4] = {
      {0.63, 0.63, 0.63, 1.0}, /* SOCK_FLOAT */
      {0.39, 0.39, 0.78, 1.0}, /* SOCK_VECTOR */
      {0.78, 0.78, 0.16, 1.0}, /* SOCK_RGBA */
      {0.39, 0.78, 0.39, 1.0}, /* SOCK_SHADER */
      {0.70, 0.65, 0.19, 1.0}, /* SOCK_BOOLEAN */
      {0.0, 0.0, 0.0, 1.0},    /*__SOCK_MESH (deprecated) */
      {0.06, 0.52, 0.15, 1.0}, /* SOCK_INT */
      {0.39, 0.39, 0.39, 1.0}, /* SOCK_STRING */
  };
  
  /* common color callbacks for standard types */
  static void std_node_socket_draw_color(bContext *UNUSED(C),
                                         PointerRNA *ptr,
                                         PointerRNA *UNUSED(node_ptr),
                                         float *r_color)
  {
    bNodeSocket *sock = ptr->data;
    int type = sock->typeinfo->type;
    copy_v4_v4(r_color, std_node_socket_colors[type]);
  }
  static void std_node_socket_interface_draw_color(bContext *UNUSED(C),
                                                   PointerRNA *ptr,
                                                   float *r_color)
  {
    bNodeSocket *sock = ptr->data;
    int type = sock->typeinfo->type;
    copy_v4_v4(r_color, std_node_socket_colors[type]);
  }
  
  /* draw function for file output node sockets,
   * displays only sub-path and format, no value button */
  static void node_file_output_socket_draw(bContext *C,
                                           uiLayout *layout,
                                           PointerRNA *ptr,
                                           PointerRNA *node_ptr)
  {
    bNodeTree *ntree = (bNodeTree *)ptr->owner_id;
    bNodeSocket *sock = ptr->data;
    uiLayout *row;
    PointerRNA inputptr, imfptr;
    int imtype;
  
    row = uiLayoutRow(layout, false);
  
    imfptr = RNA_pointer_get(node_ptr, "format");
    imtype = RNA_enum_get(&imfptr, "file_format");
  
    if (imtype == R_IMF_IMTYPE_MULTILAYER) {
      NodeImageMultiFileSocket *input = sock->storage;
      RNA_pointer_create(&ntree->id, &RNA_NodeOutputFileSlotLayer, input, &inputptr);
  
      uiItemL(row, input->layer, ICON_NONE);
    }
    else {
      NodeImageMultiFileSocket *input = sock->storage;
      PropertyRNA *imtype_prop;
      const char *imtype_name;
      uiBlock *block;
      RNA_pointer_create(&ntree->id, &RNA_NodeOutputFileSlotFile, input, &inputptr);
  
      uiItemL(row, input->path, ICON_NONE);
  
      if (!RNA_boolean_get(&inputptr, "use_node_format")) {
        imfptr = RNA_pointer_get(&inputptr, "format");
      }
  
      imtype_prop = RNA_struct_find_property(&imfptr, "file_format");
      RNA_property_enum_name((bContext *)C,
                             &imfptr,
                             imtype_prop,
                             RNA_property_enum_get(&imfptr, imtype_prop),
                             &imtype_name);
      block = uiLayoutGetBlock(row);
      UI_block_emboss_set(block, UI_EMBOSS_PULLDOWN);
      uiItemL(row, imtype_name, ICON_NONE);
      UI_block_emboss_set(block, UI_EMBOSS_NONE);
    }
  }
  
  static void std_node_socket_draw(
      bContext *C, uiLayout *layout, PointerRNA *ptr, PointerRNA *node_ptr, const char *text)
  {
    bNode *node = node_ptr->data;
    bNodeSocket *sock = ptr->data;
    int type = sock->typeinfo->type;
    /*int subtype = sock->typeinfo->subtype;*/
  
    /* XXX not nice, eventually give this node its own socket type ... */
    if (node->type == CMP_NODE_OUTPUT_FILE) {
      node_file_output_socket_draw(C, layout, ptr, node_ptr);
      return;
    }
  
    if ((sock->in_out == SOCK_OUT) || (sock->flag & SOCK_IN_USE) || (sock->flag & SOCK_HIDE_VALUE)) {
      node_socket_button_label(C, layout, ptr, node_ptr, text);
      return;
    }
  
    switch (type) {
      case SOCK_FLOAT:
      case SOCK_INT:
      case SOCK_BOOLEAN:
        uiItemR(layout, ptr, "default_value", 0, text, 0);
        break;
      case SOCK_VECTOR:
        if (sock->flag & SOCK_COMPACT) {
          uiTemplateComponentMenu(layout, ptr, "default_value", text);
        }
        else {
          if (sock->typeinfo->subtype == PROP_DIRECTION) {
            uiItemR(layout, ptr, "default_value", 0, "", ICON_NONE);
          }
          else {
            uiLayout *column = uiLayoutColumn(layout, true);
            uiItemR(column, ptr, "default_value", 0, text, ICON_NONE);
          }
        }
        break;
      case SOCK_RGBA:
      case SOCK_STRING: {
        uiLayout *row = uiLayoutSplit(layout, 0.5f, false);
        uiItemL(row, text, 0);
        uiItemR(row, ptr, "default_value", 0, "", 0);
        break;
      }
      default:
        node_socket_button_label(C, layout, ptr, node_ptr, text);
        break;
    }
  }
  
  static void std_node_socket_interface_draw(bContext *UNUSED(C), uiLayout *layout, PointerRNA *ptr)
  {
    bNodeSocket *sock = ptr->data;
    int type = sock->typeinfo->type;
    /*int subtype = sock->typeinfo->subtype;*/
  
    switch (type) {
      case SOCK_FLOAT: {
        uiLayout *row;
        uiItemR(layout, ptr, "default_value", 0, NULL, 0);
        row = uiLayoutRow(layout, true);
        uiItemR(row, ptr, "min_value", 0, IFACE_("Min"), 0);
        uiItemR(row, ptr, "max_value", 0, IFACE_("Max"), 0);
        break;
      }
      case SOCK_INT: {
        uiLayout *row;
        uiItemR(layout, ptr, "default_value", 0, NULL, 0);
        row = uiLayoutRow(layout, true);
        uiItemR(row, ptr, "min_value", 0, IFACE_("Min"), 0);
        uiItemR(row, ptr, "max_value", 0, IFACE_("Max"), 0);
        break;
      }
      case SOCK_VECTOR: {
        uiLayout *row;
        uiItemR(layout, ptr, "default_value", UI_ITEM_R_EXPAND, NULL, 0);
        row = uiLayoutRow(layout, true);
        uiItemR(row, ptr, "min_value", 0, IFACE_("Min"), 0);
        uiItemR(row, ptr, "max_value", 0, IFACE_("Max"), 0);
        break;
      }
      case SOCK_BOOLEAN:
      case SOCK_RGBA:
      case SOCK_STRING: {
        uiItemR(layout, ptr, "default_value", 0, NULL, 0);
        break;
      }
    }
  }
  
  void ED_init_standard_node_socket_type(bNodeSocketType *stype)
  {
    stype->draw = std_node_socket_draw;
    stype->draw_color = std_node_socket_draw_color;
    stype->interface_draw = std_node_socket_interface_draw;
    stype->interface_draw_color = std_node_socket_interface_draw_color;
  }
  
  static void node_socket_virtual_draw_color(bContext *UNUSED(C),
                                             PointerRNA *UNUSED(ptr),
                                             PointerRNA *UNUSED(node_ptr),
                                             float *r_color)
  {
    /* alpha = 0, empty circle */
    zero_v4(r_color);
  }
  
  void ED_init_node_socket_type_virtual(bNodeSocketType *stype)
  {
    stype->draw = node_socket_button_label;
    stype->draw_color = node_socket_virtual_draw_color;
  }
  
  /* ************** Generic drawing ************** */
  
  void draw_nodespace_back_pix(const bContext *C,
                               ARegion *ar,
                               SpaceNode *snode,
                               bNodeInstanceKey parent_key)
  {
    Main *bmain = CTX_data_main(C);
    bNodeInstanceKey active_viewer_key = (snode->nodetree ? snode->nodetree->active_viewer_key :
                                                            NODE_INSTANCE_KEY_NONE);
    float shuffle[4] = {0.0f, 0.0f, 0.0f, 0.0f};
    Image *ima;
    void *lock;
    ImBuf *ibuf;
  
    GPU_matrix_push_projection();
    GPU_matrix_push();
    wmOrtho2_region_pixelspace(ar);
    GPU_matrix_identity_set();
    ED_region_draw_cb_draw(C, ar, REGION_DRAW_BACKDROP);
    GPU_matrix_pop_projection();
    GPU_matrix_pop();
  
    if (!(snode->flag & SNODE_BACKDRAW) || !ED_node_is_compositor(snode)) {
      return;
    }
  
    if (parent_key.value != active_viewer_key.value) {
      return;
    }
  
    ima = BKE_image_verify_viewer(bmain, IMA_TYPE_COMPOSITE, "Viewer Node");
    ibuf = BKE_image_acquire_ibuf(ima, NULL, &lock);
    if (ibuf) {
      float x, y;
  
      GPU_matrix_push_projection();
      GPU_matrix_push();
  
      /* somehow the offset has to be calculated inverse */
      wmOrtho2_region_pixelspace(ar);
  
      x = (ar->winx - snode->zoom * ibuf->x) / 2 + snode->xof;
      y = (ar->winy - snode->zoom * ibuf->y) / 2 + snode->yof;
  
      if (ibuf->rect || ibuf->rect_float) {
        unsigned char *display_buffer = NULL;
        void *cache_handle = NULL;
  
        if (snode->flag & (SNODE_SHOW_R | SNODE_SHOW_G | SNODE_SHOW_B | SNODE_SHOW_ALPHA)) {
  
          display_buffer = IMB_display_buffer_acquire_ctx(C, ibuf, &cache_handle);
  
          if (snode->flag & SNODE_SHOW_R) {
            shuffle[0] = 1.0f;
          }
          else if (snode->flag & SNODE_SHOW_G) {
            shuffle[1] = 1.0f;
          }
          else if (snode->flag & SNODE_SHOW_B) {
            shuffle[2] = 1.0f;
          }
          else {
            shuffle[3] = 1.0f;
          }
  
          IMMDrawPixelsTexState state = immDrawPixelsTexSetup(GPU_SHADER_2D_IMAGE_SHUFFLE_COLOR);
          GPU_shader_uniform_vector(
              state.shader, GPU_shader_get_uniform_ensure(state.shader, "shuffle"), 4, 1, shuffle);
  
          immDrawPixelsTex(&state,
                           x,
                           y,
                           ibuf->x,
                           ibuf->y,
                           GL_RGBA,
                           GL_UNSIGNED_BYTE,
                           GL_NEAREST,
                           display_buffer,
                           snode->zoom,
                           snode->zoom,
                           NULL);
  
          GPU_shader_unbind();
        }
        else if (snode->flag & SNODE_USE_ALPHA) {
          GPU_blend(true);
          GPU_blend_set_func_separate(
              GPU_SRC_ALPHA, GPU_ONE_MINUS_SRC_ALPHA, GPU_ONE, GPU_ONE_MINUS_SRC_ALPHA);
  
          ED_draw_imbuf_ctx(C, ibuf, x, y, GL_NEAREST, snode->zoom, snode->zoom);
  
          GPU_blend(false);
        }
        else {
          ED_draw_imbuf_ctx(C, ibuf, x, y, GL_NEAREST, snode->zoom, snode->zoom);
        }
  
        if (cache_handle) {
          IMB_display_buffer_release(cache_handle);
        }
      }
  
      /** \note draw selected info on backdrop */
      if (snode->edittree) {
        bNode *node = snode->edittree->nodes.first;
        rctf *viewer_border = &snode->nodetree->viewer_border;
        while (node) {
          if (node->flag & NODE_SELECT) {
            if (node->typeinfo->draw_backdrop) {
              node->typeinfo->draw_backdrop(snode, ibuf, node, x, y);
            }
          }
          node = node->next;
        }
  
        if ((snode->nodetree->flag & NTREE_VIEWER_BORDER) &&
            viewer_border->xmin < viewer_border->xmax && viewer_border->ymin < viewer_border->ymax) {
          rcti pixel_border;
          BLI_rcti_init(&pixel_border,
                        x + snode->zoom * viewer_border->xmin * ibuf->x,
                        x + snode->zoom * viewer_border->xmax * ibuf->x,
                        y + snode->zoom * viewer_border->ymin * ibuf->y,
                        y + snode->zoom * viewer_border->ymax * ibuf->y);
  
          uint pos = GPU_vertformat_attr_add(
              immVertexFormat(), "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
          immBindBuiltinProgram(GPU_SHADER_2D_UNIFORM_COLOR);
          immUniformThemeColor(TH_ACTIVE);
  
          immDrawBorderCorners(pos, &pixel_border, 1.0f, 1.0f);
  
          immUnbindProgram();
        }
      }
  
      GPU_matrix_pop_projection();
      GPU_matrix_pop();
    }
  
    BKE_image_release_ibuf(ima, ibuf, lock);
  }
  
  /* return quadratic beziers points for a given nodelink and clip if v2d is not NULL. */
  static bool node_link_bezier_handles(View2D *v2d,
                                       SpaceNode *snode,
                                       bNodeLink *link,
                                       float vec[4][2])
  {
    float dist;
    float deltax, deltay;
    float cursor[2] = {0.0f, 0.0f};
    int toreroute, fromreroute;
  
    /* this function can be called with snode null (via cut_links_intersect) */
    /* XXX map snode->cursor back to view space */
    if (snode) {
      cursor[0] = snode->cursor[0] * UI_DPI_FAC;
      cursor[1] = snode->cursor[1] * UI_DPI_FAC;
    }
  
    /* in v0 and v3 we put begin/end points */
    if (link->fromsock) {
      vec[0][0] = link->fromsock->locx;
      vec[0][1] = link->fromsock->locy;
      fromreroute = (link->fromnode && link->fromnode->type == NODE_REROUTE);
    }
    else {
      if (snode == NULL) {
        return 0;
      }
      copy_v2_v2(vec[0], cursor);
      fromreroute = 0;
    }
    if (link->tosock) {
      vec[3][0] = link->tosock->locx;
      vec[3][1] = link->tosock->locy;
      toreroute = (link->tonode && link->tonode->type == NODE_REROUTE);
    }
    else {
      if (snode == NULL) {
        return 0;
      }
      copy_v2_v2(vec[3], cursor);
      toreroute = 0;
    }
  
    /* may be called outside of drawing (so pass spacetype) */
    int curving = UI_GetThemeValueType(TH_NODE_CURVING, SPACE_NODE);
  
    if (curving == 0) {
      /* Straight line: align all points. */
      mid_v2_v2v2(vec[1], vec[0], vec[3]);
      mid_v2_v2v2(vec[2], vec[1], vec[3]);
      return 1;
    }
  
    dist = curving * 0.10f * fabsf(vec[0][0] - vec[3][0]);
    deltax = vec[3][0] - vec[0][0];
    deltay = vec[3][1] - vec[0][1];
    /* check direction later, for top sockets */
    if (fromreroute) {
      if (ABS(deltax) > ABS(deltay)) {
        vec[1][1] = vec[0][1];
        vec[1][0] = vec[0][0] + (deltax > 0 ? dist : -dist);
      }
      else {
        vec[1][0] = vec[0][0];
        vec[1][1] = vec[0][1] + (deltay > 0 ? dist : -dist);
      }
    }
    else {
      vec[1][0] = vec[0][0] + dist;
      vec[1][1] = vec[0][1];
    }
    if (toreroute) {
      if (ABS(deltax) > ABS(deltay)) {
        vec[2][1] = vec[3][1];
        vec[2][0] = vec[3][0] + (deltax > 0 ? -dist : dist);
      }
      else {
        vec[2][0] = vec[3][0];
        vec[2][1] = vec[3][1] + (deltay > 0 ? -dist : dist);
      }
    }
    else {
      vec[2][0] = vec[3][0] - dist;
      vec[2][1] = vec[3][1];
    }
  
    if (v2d && min_ffff(vec[0][0], vec[1][0], vec[2][0], vec[3][0]) > v2d->cur.xmax) {
      return 0; /* clipped */
    }
    else if (v2d && max_ffff(vec[0][0], vec[1][0], vec[2][0], vec[3][0]) < v2d->cur.xmin) {
      return 0; /* clipped */
    }
  
    return 1;
  }
  
  /* if v2d not NULL, it clips and returns 0 if not visible */
  bool node_link_bezier_points(
      View2D *v2d, SpaceNode *snode, bNodeLink *link, float coord_array[][2], int resol)
  {
    float vec[4][2];
  
    if (node_link_bezier_handles(v2d, snode, link, vec)) {
      /* always do all three, to prevent data hanging around */
      BKE_curve_forward_diff_bezier(
          vec[0][0], vec[1][0], vec[2][0], vec[3][0], coord_array[0] + 0, resol, sizeof(float) * 2);
      BKE_curve_forward_diff_bezier(
          vec[0][1], vec[1][1], vec[2][1], vec[3][1], coord_array[0] + 1, resol, sizeof(float) * 2);
  
      return 1;
    }
    return 0;
  }
  
  #define NODELINK_GROUP_SIZE 256
  #define LINK_RESOL 24
  #define LINK_WIDTH (2.5f * UI_DPI_FAC)
  #define ARROW_SIZE (7 * UI_DPI_FAC)
  
  static float arrow_verts[3][2] = {{-1.0f, 1.0f}, {0.0f, 0.0f}, {-1.0f, -1.0f}};
  static float arrow_expand_axis[3][2] = {{0.7071f, 0.7071f}, {M_SQRT2, 0.0f}, {0.7071f, -0.7071f}};
  
  static struct {
    GPUBatch *batch;        /* for batching line together */
    GPUBatch *batch_single; /* for single line */
    GPUVertBuf *inst_vbo;
    unsigned int p0_id, p1_id, p2_id, p3_id;
    unsigned int colid_id;
    GPUVertBufRaw p0_step, p1_step, p2_step, p3_step;
    GPUVertBufRaw colid_step;
    unsigned int count;
    bool enabled;
  } g_batch_link = {0};
  
  static void nodelink_batch_reset(void)
  {
    GPU_vertbuf_attr_get_raw_data(g_batch_link.inst_vbo, g_batch_link.p0_id, &g_batch_link.p0_step);
    GPU_vertbuf_attr_get_raw_data(g_batch_link.inst_vbo, g_batch_link.p1_id, &g_batch_link.p1_step);
    GPU_vertbuf_attr_get_raw_data(g_batch_link.inst_vbo, g_batch_link.p2_id, &g_batch_link.p2_step);
    GPU_vertbuf_attr_get_raw_data(g_batch_link.inst_vbo, g_batch_link.p3_id, &g_batch_link.p3_step);
    GPU_vertbuf_attr_get_raw_data(
        g_batch_link.inst_vbo, g_batch_link.colid_id, &g_batch_link.colid_step);
    g_batch_link.count = 0;
  }
  
  static void set_nodelink_vertex(GPUVertBuf *vbo,
                                  unsigned int uv_id,
                                  unsigned int pos_id,
                                  unsigned int exp_id,
                                  unsigned int v,
                                  const unsigned char uv[2],
                                  const float pos[2],
                                  const float exp[2])
  {
    GPU_vertbuf_attr_set(vbo, uv_id, v, uv);
    GPU_vertbuf_attr_set(vbo, pos_id, v, pos);
    GPU_vertbuf_attr_set(vbo, exp_id, v, exp);
  }
  
  static void nodelink_batch_init(void)
  {
    GPUVertFormat format = {0};
    uint uv_id = GPU_vertformat_attr_add(&format, "uv", GPU_COMP_U8, 2, GPU_FETCH_INT_TO_FLOAT_UNIT);
    uint pos_id = GPU_vertformat_attr_add(&format, "pos", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
    uint expand_id = GPU_vertformat_attr_add(&format, "expand", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
    GPUVertBuf *vbo = GPU_vertbuf_create_with_format_ex(&format, GPU_USAGE_STATIC);
    int vcount = LINK_RESOL * 2; /* curve */
    vcount += 2;                 /* restart strip */
    vcount += 3 * 2;             /* arrow */
    vcount *= 2;                 /* shadow */
    vcount += 2;                 /* restart strip */
    GPU_vertbuf_data_alloc(vbo, vcount);
    int v = 0;
  
    for (int k = 0; k < 2; k++) {
      unsigned char uv[2] = {0, 0};
      float pos[2] = {0.0f, 0.0f};
      float exp[2] = {0.0f, 1.0f};
  
      /* restart */
      if (k == 1) {
        set_nodelink_vertex(vbo, uv_id, pos_id, expand_id, v++, uv, pos, exp);
      }
  
      /* curve strip */
      for (int i = 0; i < LINK_RESOL; i++) {
        uv[0] = 255 * (i / (float)(LINK_RESOL - 1));
        uv[1] = 0;
        set_nodelink_vertex(vbo, uv_id, pos_id, expand_id, v++, uv, pos, exp);
        uv[1] = 255;
        set_nodelink_vertex(vbo, uv_id, pos_id, expand_id, v++, uv, pos, exp);
      }
      /* restart */
      set_nodelink_vertex(vbo, uv_id, pos_id, expand_id, v++, uv, pos, exp);
  
      uv[0] = 127;
      uv[1] = 0;
      copy_v2_v2(pos, arrow_verts[0]);
      copy_v2_v2(exp, arrow_expand_axis[0]);
      set_nodelink_vertex(vbo, uv_id, pos_id, expand_id, v++, uv, pos, exp);
      /* arrow */
      for (int i = 0; i < 3; i++) {
        uv[1] = 0;
        copy_v2_v2(pos, arrow_verts[i]);
        copy_v2_v2(exp, arrow_expand_axis[i]);
        set_nodelink_vertex(vbo, uv_id, pos_id, expand_id, v++, uv, pos, exp);
  
        uv[1] = 255;
        set_nodelink_vertex(vbo, uv_id, pos_id, expand_id, v++, uv, pos, exp);
      }
  
      /* restart */
      if (k == 0) {
        set_nodelink_vertex(vbo, uv_id, pos_id, expand_id, v++, uv, pos, exp);
      }
    }
  
    g_batch_link.batch = GPU_batch_create_ex(GPU_PRIM_TRI_STRIP, vbo, NULL, GPU_BATCH_OWNS_VBO);
    gpu_batch_presets_register(g_batch_link.batch);
  
    g_batch_link.batch_single = GPU_batch_create_ex(GPU_PRIM_TRI_STRIP, vbo, NULL, 0);
    gpu_batch_presets_register(g_batch_link.batch_single);
  
    /* Instances data */
    GPUVertFormat format_inst = {0};
    g_batch_link.p0_id = GPU_vertformat_attr_add(
        &format_inst, "P0", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
    g_batch_link.p1_id = GPU_vertformat_attr_add(
        &format_inst, "P1", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
    g_batch_link.p2_id = GPU_vertformat_attr_add(
        &format_inst, "P2", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
    g_batch_link.p3_id = GPU_vertformat_attr_add(
        &format_inst, "P3", GPU_COMP_F32, 2, GPU_FETCH_FLOAT);
    g_batch_link.colid_id = GPU_vertformat_attr_add(
        &format_inst, "colid_doarrow", GPU_COMP_U8, 4, GPU_FETCH_INT);
    g_batch_link.inst_vbo = GPU_vertbuf_create_with_format_ex(&format_inst, GPU_USAGE_STREAM);
    /* Alloc max count but only draw the range we need. */
    GPU_vertbuf_data_alloc(g_batch_link.inst_vbo, NODELINK_GROUP_SIZE);
  
    GPU_batch_instbuf_set(g_batch_link.batch, g_batch_link.inst_vbo, true);
  
    nodelink_batch_reset();
  }
  
  static char nodelink_get_color_id(int th_col)
  {
    switch (th_col) {
      case TH_WIRE:
        return 1;
      case TH_WIRE_INNER:
        return 2;
      case TH_ACTIVE:
        return 3;
      case TH_EDGE_SELECT:
        return 4;
      case TH_REDALERT:
        return 5;
    }
    return 0;
  }
  
  static void nodelink_batch_draw(SpaceNode *snode)
  {
    if (g_batch_link.count == 0) {
      return;
    }
  
    GPU_blend(true);
  
    float colors[6][4] = {{0.0f}};
    UI_GetThemeColor4fv(TH_WIRE_INNER, colors[nodelink_get_color_id(TH_WIRE_INNER)]);
    UI_GetThemeColor4fv(TH_WIRE, colors[nodelink_get_color_id(TH_WIRE)]);
    UI_GetThemeColor4fv(TH_ACTIVE, colors[nodelink_get_color_id(TH_ACTIVE)]);
    UI_GetThemeColor4fv(TH_EDGE_SELECT, colors[nodelink_get_color_id(TH_EDGE_SELECT)]);
    UI_GetThemeColor4fv(TH_REDALERT, colors[nodelink_get_color_id(TH_REDALERT)]);
  
    GPU_vertbuf_data_len_set(g_batch_link.inst_vbo, g_batch_link.count);
    GPU_vertbuf_use(g_batch_link.inst_vbo); /* force update. */
  
    GPU_batch_program_set_builtin(g_batch_link.batch, GPU_SHADER_2D_NODELINK_INST);
    GPU_batch_uniform_4fv_array(g_batch_link.batch, "colors", 6, (float *)colors);
    GPU_batch_uniform_1f(g_batch_link.batch, "expandSize", snode->aspect * LINK_WIDTH);
    GPU_batch_uniform_1f(g_batch_link.batch, "arrowSize", ARROW_SIZE);
    GPU_batch_draw(g_batch_link.batch);
  
    nodelink_batch_reset();
  
    GPU_blend(false);
  }
  
  void nodelink_batch_start(SpaceNode *UNUSED(snode))
  {
    g_batch_link.enabled = true;
  }
  
  void nodelink_batch_end(SpaceNode *snode)
  {
    nodelink_batch_draw(snode);
    g_batch_link.enabled = false;
  }
  
  static void nodelink_batch_add_link(SpaceNode *snode,
                                      const float p0[2],
                                      const float p1[2],
                                      const float p2[2],
                                      const float p3[2],
                                      int th_col1,
                                      int th_col2,
                                      int th_col3,
                                      bool drawarrow)
  {
    /* Only allow these colors. If more is needed, you need to modify the shader accordingly. */
    BLI_assert(ELEM(th_col1, TH_WIRE_INNER, TH_WIRE, TH_ACTIVE, TH_EDGE_SELECT, TH_REDALERT));
    BLI_assert(ELEM(th_col2, TH_WIRE_INNER, TH_WIRE, TH_ACTIVE, TH_EDGE_SELECT, TH_REDALERT));
    BLI_assert(ELEM(th_col3, TH_WIRE, -1));
  
    g_batch_link.count++;
    copy_v2_v2(GPU_vertbuf_raw_step(&g_batch_link.p0_step), p0);
    copy_v2_v2(GPU_vertbuf_raw_step(&g_batch_link.p1_step), p1);
    copy_v2_v2(GPU_vertbuf_raw_step(&g_batch_link.p2_step), p2);
    copy_v2_v2(GPU_vertbuf_raw_step(&g_batch_link.p3_step), p3);
    char *colid = GPU_vertbuf_raw_step(&g_batch_link.colid_step);
    colid[0] = nodelink_get_color_id(th_col1);
    colid[1] = nodelink_get_color_id(th_col2);
    colid[2] = nodelink_get_color_id(th_col3);
    colid[3] = drawarrow;
  
    if (g_batch_link.count == NODELINK_GROUP_SIZE) {
      nodelink_batch_draw(snode);
    }
  }
  
  /* don't do shadows if th_col3 is -1. */
  void node_draw_link_bezier(
      View2D *v2d, SpaceNode *snode, bNodeLink *link, int th_col1, int th_col2, int th_col3)
  {
    float vec[4][2];
  
    if (node_link_bezier_handles(v2d, snode, link, vec)) {
      int drawarrow = ((link->tonode && (link->tonode->type == NODE_REROUTE)) &&
                       (link->fromnode && (link->fromnode->type == NODE_REROUTE)));
  
      if (g_batch_link.batch == NULL) {
        nodelink_batch_init();
      }
  
      if (g_batch_link.enabled) {
        /* Add link to batch. */
        nodelink_batch_add_link(
            snode, vec[0], vec[1], vec[2], vec[3], th_col1, th_col2, th_col3, drawarrow);
      }
      else {
        /* Draw single link. */
        float colors[3][4] = {{0.0f}};
        if (th_col3 != -1) {
          UI_GetThemeColor4fv(th_col3, colors[0]);
        }
        UI_GetThemeColor4fv(th_col1, colors[1]);
        UI_GetThemeColor4fv(th_col2, colors[2]);
  
        GPUBatch *batch = g_batch_link.batch_single;
        GPU_batch_program_set_builtin(batch, GPU_SHADER_2D_NODELINK);
        GPU_batch_uniform_2fv_array(batch, "bezierPts", 4, (float *)vec);
        GPU_batch_uniform_4fv_array(batch, "colors", 3, (float *)colors);
        GPU_batch_uniform_1f(batch, "expandSize", snode->aspect * LINK_WIDTH);
        GPU_batch_uniform_1f(batch, "arrowSize", ARROW_SIZE);
        GPU_batch_uniform_1i(batch, "doArrow", drawarrow);
        GPU_batch_draw(batch);
      }
    }
  }
  
  /* note; this is used for fake links in groups too */
  void node_draw_link(View2D *v2d, SpaceNode *snode, bNodeLink *link)
  {
    int th_col1 = TH_WIRE_INNER, th_col2 = TH_WIRE_INNER, th_col3 = TH_WIRE;
  
    if (link->fromsock == NULL && link->tosock == NULL) {
      return;
    }
  
    /* new connection */
    if (!link->fromsock || !link->tosock) {
      th_col1 = th_col2 = TH_ACTIVE;
    }
    else {
      /* going to give issues once... */
      if (link->tosock->flag & SOCK_UNAVAIL) {
        return;
      }
      if (link->fromsock->flag & SOCK_UNAVAIL) {
        return;
      }
  
      if (link->flag & NODE_LINK_VALID) {
        /* special indicated link, on drop-node */
        if (link->flag & NODE_LINKFLAG_HILITE) {
          th_col1 = th_col2 = TH_ACTIVE;
        }
        else {
          /* regular link */
          if (link->fromnode && link->fromnode->flag & SELECT) {
            th_col1 = TH_EDGE_SELECT;
          }
          if (link->tonode && link->tonode->flag & SELECT) {
            th_col2 = TH_EDGE_SELECT;
          }
        }
      }
      else {
        th_col1 = th_col2 = TH_REDALERT;
        // th_col3 = -1; /* no shadow */
      }
    }
  
    node_draw_link_bezier(v2d, snode, link, th_col1, th_col2, th_col3);
    //  node_draw_link_straight(v2d, snode, link, th_col1, do_shaded, th_col2, do_triple, th_col3);
  }
  
  void ED_node_draw_snap(
      View2D *v2d, const float cent[2], float size, NodeBorder border, unsigned pos)
  {
    immBegin(GPU_PRIM_LINES, 4);
  
    if (border & (NODE_LEFT | NODE_RIGHT)) {
      immVertex2f(pos, cent[0], v2d->cur.ymin);
      immVertex2f(pos, cent[0], v2d->cur.ymax);
    }
    else {
      immVertex2f(pos, cent[0], cent[1] - size);
      immVertex2f(pos, cent[0], cent[1] + size);
    }
  
    if (border & (NODE_TOP | NODE_BOTTOM)) {
      immVertex2f(pos, v2d->cur.xmin, cent[1]);
      immVertex2f(pos, v2d->cur.xmax, cent[1]);
    }
    else {
      immVertex2f(pos, cent[0] - size, cent[1]);
      immVertex2f(pos, cent[0] + size, cent[1]);
    }
  
    immEnd();
  }
  