text: /*
   * Copyright 2010 Red Hat Inc.
   *
   * Permission is hereby granted, free of charge, to any person obtaining a
   * copy of this software and associated documentation files (the "Software"),
   * to deal in the Software without restriction, including without limitation
   * on the rights to use, copy, modify, merge, publish, distribute, sub
   * license, and/or sell copies of the Software, and to permit persons to whom
   * the Software is furnished to do so, subject to the following conditions:
   *
   * The above copyright notice and this permission notice (including the next
   * paragraph) shall be included in all copies or substantial portions of the
   * Software.
   *
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
   * THE AUTHOR(S) AND/OR THEIR SUPPLIERS BE LIABLE FOR ANY CLAIM,
   * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
   * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
   * USE OR OTHER DEALINGS IN THE SOFTWARE.
   */
  #include <stdio.h>
  #include <errno.h>
  #include "pipe/p_defines.h"
  #include "pipe/p_state.h"
  #include "pipe/p_context.h"
  #include "pipe/p_screen.h"
  #include "util/u_memory.h"
  #include "util/u_inlines.h"
  #include "util/u_format.h"
  #include "util/u_upload_mgr.h"
  #include "noop_public.h"
  
  DEBUG_GET_ONCE_BOOL_OPTION(noop, "GALLIUM_NOOP", FALSE)
  
  void noop_init_state_functions(struct pipe_context *ctx);
  
  struct noop_pipe_screen {
     struct pipe_screen	pscreen;
     struct pipe_screen	*oscreen;
  };
  
  /*
   * query
   */
  struct noop_query {
     unsigned	query;
  };
  static struct pipe_query *noop_create_query(struct pipe_context *ctx, unsigned query_type, unsigned index)
  {
     struct noop_query *query = CALLOC_STRUCT(noop_query);
  
     return (struct pipe_query *)query;
  }
  
  static void noop_destroy_query(struct pipe_context *ctx, struct pipe_query *query)
  {
     FREE(query);
  }
  
  static boolean noop_begin_query(struct pipe_context *ctx, struct pipe_query *query)
  {
     return true;
  }
  
  static bool noop_end_query(struct pipe_context *ctx, struct pipe_query *query)
  {
     return true;
  }
  
  static boolean noop_get_query_result(struct pipe_context *ctx,
                                       struct pipe_query *query,
                                       boolean wait,
                                       union pipe_query_result *vresult)
  {
     uint64_t *result = (uint64_t*)vresult;
  
     *result = 0;
     return TRUE;
  }
  
  static void
  noop_set_active_query_state(struct pipe_context *pipe, boolean enable)
  {
  }
  
  
  /*
   * resource
   */
  struct noop_resource {
     struct pipe_resource	base;
     unsigned		size;
     char			*data;
     struct sw_displaytarget	*dt;
  };
  
  static struct pipe_resource *noop_resource_create(struct pipe_screen *screen,
                                                    const struct pipe_resource *templ)
  {
     struct noop_resource *nresource;
     unsigned stride;
  
     nresource = CALLOC_STRUCT(noop_resource);
     if (!nresource)
        return NULL;
  
     stride = util_format_get_stride(templ->format, templ->width0);
     nresource->base = *templ;
     nresource->base.screen = screen;
     nresource->size = stride * templ->height0 * templ->depth0;
     nresource->data = MALLOC(nresource->size);
     pipe_reference_init(&nresource->base.reference, 1);
     if (nresource->data == NULL) {
        FREE(nresource);
        return NULL;
     }
     return &nresource->base;
  }
  
  static struct pipe_resource *noop_resource_from_handle(struct pipe_screen *screen,
                                                         const struct pipe_resource *templ,
                                                         struct winsys_handle *handle,
                                                         unsigned usage)
  {
     struct noop_pipe_screen *noop_screen = (struct noop_pipe_screen*)screen;
     struct pipe_screen *oscreen = noop_screen->oscreen;
     struct pipe_resource *result;
     struct pipe_resource *noop_resource;
  
     result = oscreen->resource_from_handle(oscreen, templ, handle, usage);
     noop_resource = noop_resource_create(screen, result);
     pipe_resource_reference(&result, NULL);
     return noop_resource;
  }
  
  static boolean noop_resource_get_handle(struct pipe_screen *pscreen,
                                          struct pipe_context *ctx,
                                          struct pipe_resource *resource,
                                          struct winsys_handle *handle,
                                          unsigned usage)
  {
     struct noop_pipe_screen *noop_screen = (struct noop_pipe_screen*)pscreen;
     struct pipe_screen *screen = noop_screen->oscreen;
     struct pipe_resource *tex;
     bool result;
  
     /* resource_get_handle musn't fail. Just create something and return it. */
     tex = screen->resource_create(screen, resource);
     if (!tex)
        return false;
  
     result = screen->resource_get_handle(screen, NULL, tex, handle, usage);
     pipe_resource_reference(&tex, NULL);
     return result;
  }
  
  static void noop_resource_destroy(struct pipe_screen *screen,
                                    struct pipe_resource *resource)
  {
     struct noop_resource *nresource = (struct noop_resource *)resource;
  
     FREE(nresource->data);
     FREE(resource);
  }
  
  
  /*
   * transfer
   */
  static void *noop_transfer_map(struct pipe_context *pipe,
                                 struct pipe_resource *resource,
                                 unsigned level,
                                 enum pipe_transfer_usage usage,
                                 const struct pipe_box *box,
                                 struct pipe_transfer **ptransfer)
  {
     struct pipe_transfer *transfer;
     struct noop_resource *nresource = (struct noop_resource *)resource;
  
     transfer = CALLOC_STRUCT(pipe_transfer);
     if (!transfer)
        return NULL;
     pipe_resource_reference(&transfer->resource, resource);
     transfer->level = level;
     transfer->usage = usage;
     transfer->box = *box;
     transfer->stride = 1;
     transfer->layer_stride = 1;
     *ptransfer = transfer;
  
     return nresource->data;
  }
  
  static void noop_transfer_flush_region(struct pipe_context *pipe,
                                         struct pipe_transfer *transfer,
                                         const struct pipe_box *box)
  {
  }
  
  static void noop_transfer_unmap(struct pipe_context *pipe,
                                  struct pipe_transfer *transfer)
  {
     pipe_resource_reference(&transfer->resource, NULL);
     FREE(transfer);
  }
  
  static void noop_buffer_subdata(struct pipe_context *pipe,
                                  struct pipe_resource *resource,
                                  unsigned usage, unsigned offset,
                                  unsigned size, const void *data)
  {
  }
  
  static void noop_texture_subdata(struct pipe_context *pipe,
                                   struct pipe_resource *resource,
                                   unsigned level,
                                   unsigned usage,
                                   const struct pipe_box *box,
                                   const void *data,
                                   unsigned stride,
                                   unsigned layer_stride)
  {
  }
  
  
  /*
   * clear/copy
   */
  static void noop_clear(struct pipe_context *ctx, unsigned buffers,
                         const union pipe_color_union *color, double depth, unsigned stencil)
  {
  }
  
  static void noop_clear_render_target(struct pipe_context *ctx,
                                       struct pipe_surface *dst,
                                       const union pipe_color_union *color,
                                       unsigned dstx, unsigned dsty,
                                       unsigned width, unsigned height,
                                       bool render_condition_enabled)
  {
  }
  
  static void noop_clear_depth_stencil(struct pipe_context *ctx,
                                       struct pipe_surface *dst,
                                       unsigned clear_flags,
                                       double depth,
                                       unsigned stencil,
                                       unsigned dstx, unsigned dsty,
                                       unsigned width, unsigned height,
                                       bool render_condition_enabled)
  {
  }
  
  static void noop_resource_copy_region(struct pipe_context *ctx,
                                        struct pipe_resource *dst,
                                        unsigned dst_level,
                                        unsigned dstx, unsigned dsty, unsigned dstz,
                                        struct pipe_resource *src,
                                        unsigned src_level,
                                        const struct pipe_box *src_box)
  {
  }
  
  
  static void noop_blit(struct pipe_context *ctx,
                        const struct pipe_blit_info *info)
  {
  }
  
  
  static void
  noop_flush_resource(struct pipe_context *ctx,
                      struct pipe_resource *resource)
  {
  }
  
  
  /*
   * context
   */
  static void noop_flush(struct pipe_context *ctx,
                         struct pipe_fence_handle **fence,
                         unsigned flags)
  {
     if (fence)
        *fence = NULL;
  }
  
  static void noop_destroy_context(struct pipe_context *ctx)
  {
     if (ctx->stream_uploader)
        u_upload_destroy(ctx->stream_uploader);
  
     FREE(ctx);
  }
  
  static boolean noop_generate_mipmap(struct pipe_context *ctx,
                                      struct pipe_resource *resource,
                                      enum pipe_format format,
                                      unsigned base_level,
                                      unsigned last_level,
                                      unsigned first_layer,
                                      unsigned last_layer)
  {
     return true;
  }
  
  static struct pipe_context *noop_create_context(struct pipe_screen *screen,
                                                  void *priv, unsigned flags)
  {
     struct pipe_context *ctx = CALLOC_STRUCT(pipe_context);
  
     if (!ctx)
        return NULL;
  
     ctx->screen = screen;
     ctx->priv = priv;
  
     ctx->stream_uploader = u_upload_create_default(ctx);
     if (!ctx->stream_uploader) {
        FREE(ctx);
        return NULL;
     }
     ctx->const_uploader = ctx->stream_uploader;
  
     ctx->destroy = noop_destroy_context;
     ctx->flush = noop_flush;
     ctx->clear = noop_clear;
     ctx->clear_render_target = noop_clear_render_target;
     ctx->clear_depth_stencil = noop_clear_depth_stencil;
     ctx->resource_copy_region = noop_resource_copy_region;
     ctx->generate_mipmap = noop_generate_mipmap;
     ctx->blit = noop_blit;
     ctx->flush_resource = noop_flush_resource;
     ctx->create_query = noop_create_query;
     ctx->destroy_query = noop_destroy_query;
     ctx->begin_query = noop_begin_query;
     ctx->end_query = noop_end_query;
     ctx->get_query_result = noop_get_query_result;
     ctx->set_active_query_state = noop_set_active_query_state;
     ctx->transfer_map = noop_transfer_map;
     ctx->transfer_flush_region = noop_transfer_flush_region;
     ctx->transfer_unmap = noop_transfer_unmap;
     ctx->buffer_subdata = noop_buffer_subdata;
     ctx->texture_subdata = noop_texture_subdata;
     noop_init_state_functions(ctx);
  
     return ctx;
  }
  
  
  /*
   * pipe_screen
   */
  static void noop_flush_frontbuffer(struct pipe_screen *_screen,
                                     struct pipe_resource *resource,
                                     unsigned level, unsigned layer,
                                     void *context_private, struct pipe_box *box)
  {
  }
  
  static const char *noop_get_vendor(struct pipe_screen* pscreen)
  {
     return "X.Org";
  }
  
  static const char *noop_get_device_vendor(struct pipe_screen* pscreen)
  {
     return "NONE";
  }
  
  static const char *noop_get_name(struct pipe_screen* pscreen)
  {
     return "NOOP";
  }
  
  static int noop_get_param(struct pipe_screen* pscreen, enum pipe_cap param)
  {
     struct pipe_screen *screen = ((struct noop_pipe_screen*)pscreen)->oscreen;
  
     return screen->get_param(screen, param);
  }
  
  static float noop_get_paramf(struct pipe_screen* pscreen,
                               enum pipe_capf param)
  {
     struct pipe_screen *screen = ((struct noop_pipe_screen*)pscreen)->oscreen;
  
     return screen->get_paramf(screen, param);
  }
  
  static int noop_get_shader_param(struct pipe_screen* pscreen,
                                   enum pipe_shader_type shader,
                                   enum pipe_shader_cap param)
  {
     struct pipe_screen *screen = ((struct noop_pipe_screen*)pscreen)->oscreen;
  
     return screen->get_shader_param(screen, shader, param);
  }
  
  static int noop_get_compute_param(struct pipe_screen *pscreen,
                                    enum pipe_shader_ir ir_type,
                                    enum pipe_compute_cap param,
                                    void *ret)
  {
     struct pipe_screen *screen = ((struct noop_pipe_screen*)pscreen)->oscreen;
  
     return screen->get_compute_param(screen, ir_type, param, ret);
  }
  
  static boolean noop_is_format_supported(struct pipe_screen* pscreen,
                                          enum pipe_format format,
                                          enum pipe_texture_target target,
                                          unsigned sample_count,
                                          unsigned usage)
  {
     struct pipe_screen *screen = ((struct noop_pipe_screen*)pscreen)->oscreen;
  
     return screen->is_format_supported(screen, format, target, sample_count, usage);
  }
  
  static uint64_t noop_get_timestamp(struct pipe_screen *pscreen)
  {
     return 0;
  }
  
  static void noop_destroy_screen(struct pipe_screen *screen)
  {
     struct noop_pipe_screen *noop_screen = (struct noop_pipe_screen*)screen;
     struct pipe_screen *oscreen = noop_screen->oscreen;
  
     oscreen->destroy(oscreen);
     FREE(screen);
  }
  
  static void noop_fence_reference(struct pipe_screen *screen,
                            struct pipe_fence_handle **ptr,
                            struct pipe_fence_handle *fence)
  {
  }
  
  static boolean noop_fence_finish(struct pipe_screen *screen,
                                   struct pipe_context *ctx,
                                   struct pipe_fence_handle *fence,
                                   uint64_t timeout)
  {
     return true;
  }
  
  static void noop_query_memory_info(struct pipe_screen *pscreen,
                                     struct pipe_memory_info *info)
  {
     struct noop_pipe_screen *noop_screen = (struct noop_pipe_screen*)pscreen;
     struct pipe_screen *screen = noop_screen->oscreen;
  
     screen->query_memory_info(screen, info);
  }
  
  struct pipe_screen *noop_screen_create(struct pipe_screen *oscreen)
  {
     struct noop_pipe_screen *noop_screen;
     struct pipe_screen *screen;
  
     if (!debug_get_option_noop()) {
        return oscreen;
     }
  
     noop_screen = CALLOC_STRUCT(noop_pipe_screen);
     if (!noop_screen) {
        return NULL;
     }
     noop_screen->oscreen = oscreen;
     screen = &noop_screen->pscreen;
  
     screen->destroy = noop_destroy_screen;
     screen->get_name = noop_get_name;
     screen->get_vendor = noop_get_vendor;
     screen->get_device_vendor = noop_get_device_vendor;
     screen->get_param = noop_get_param;
     screen->get_shader_param = noop_get_shader_param;
     screen->get_compute_param = noop_get_compute_param;
     screen->get_paramf = noop_get_paramf;
     screen->is_format_supported = noop_is_format_supported;
     screen->context_create = noop_create_context;
     screen->resource_create = noop_resource_create;
     screen->resource_from_handle = noop_resource_from_handle;
     screen->resource_get_handle = noop_resource_get_handle;
     screen->resource_destroy = noop_resource_destroy;
     screen->flush_frontbuffer = noop_flush_frontbuffer;
     screen->get_timestamp = noop_get_timestamp;
     screen->fence_reference = noop_fence_reference;
     screen->fence_finish = noop_fence_finish;
     screen->query_memory_info = noop_query_memory_info;
  
     return screen;
  }
  