text: /*
   * Copyright 2011 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 AUTHORS 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 <drm/drm_fourcc.h>
  
  #include "qxl_drv.h"
  #include "qxl_object.h"
  
  static int alloc_clips(struct qxl_device *qdev,
  		       struct qxl_release *release,
  		       unsigned int num_clips,
  		       struct qxl_bo **clips_bo)
  {
  	int size = sizeof(struct qxl_clip_rects) + sizeof(struct qxl_rect) * num_clips;
  
  	return qxl_alloc_bo_reserved(qdev, release, size, clips_bo);
  }
  
  /* returns a pointer to the already allocated qxl_rect array inside
   * the qxl_clip_rects. This is *not* the same as the memory allocated
   * on the device, it is offset to qxl_clip_rects.chunk.data */
  static struct qxl_rect *drawable_set_clipping(struct qxl_device *qdev,
  					      unsigned int num_clips,
  					      struct qxl_bo *clips_bo)
  {
  	struct qxl_clip_rects *dev_clips;
  	int ret;
  
  	ret = qxl_bo_kmap(clips_bo, (void **)&dev_clips);
  	if (ret) {
  		return NULL;
  	}
  	dev_clips->num_rects = num_clips;
  	dev_clips->chunk.next_chunk = 0;
  	dev_clips->chunk.prev_chunk = 0;
  	dev_clips->chunk.data_size = sizeof(struct qxl_rect) * num_clips;
  	return (struct qxl_rect *)dev_clips->chunk.data;
  }
  
  static int
  alloc_drawable(struct qxl_device *qdev, struct qxl_release **release)
  {
  	return qxl_alloc_release_reserved(qdev, sizeof(struct qxl_drawable),
  					  QXL_RELEASE_DRAWABLE, release, NULL);
  }
  
  static void
  free_drawable(struct qxl_device *qdev, struct qxl_release *release)
  {
  	qxl_release_free(qdev, release);
  }
  
  /* release needs to be reserved at this point */
  static int
  make_drawable(struct qxl_device *qdev, int surface, uint8_t type,
  	      const struct qxl_rect *rect,
  	      struct qxl_release *release)
  {
  	struct qxl_drawable *drawable;
  	int i;
  
  	drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
  	if (!drawable)
  		return -ENOMEM;
  
  	drawable->type = type;
  
  	drawable->surface_id = surface;		/* Only primary for now */
  	drawable->effect = QXL_EFFECT_OPAQUE;
  	drawable->self_bitmap = 0;
  	drawable->self_bitmap_area.top = 0;
  	drawable->self_bitmap_area.left = 0;
  	drawable->self_bitmap_area.bottom = 0;
  	drawable->self_bitmap_area.right = 0;
  	/* FIXME: add clipping */
  	drawable->clip.type = SPICE_CLIP_TYPE_NONE;
  
  	/*
  	 * surfaces_dest[i] should apparently be filled out with the
  	 * surfaces that we depend on, and surface_rects should be
  	 * filled with the rectangles of those surfaces that we
  	 * are going to use.
  	 */
  	for (i = 0; i < 3; ++i)
  		drawable->surfaces_dest[i] = -1;
  
  	if (rect)
  		drawable->bbox = *rect;
  
  	drawable->mm_time = qdev->rom->mm_clock;
  	qxl_release_unmap(qdev, release, &drawable->release_info);
  	return 0;
  }
  
  /* push a draw command using the given clipping rectangles as
   * the sources from the shadow framebuffer.
   *
   * Right now implementing with a single draw and a clip list. Clip
   * lists are known to be a problem performance wise, this can be solved
   * by treating them differently in the server.
   */
  void qxl_draw_dirty_fb(struct qxl_device *qdev,
  		       struct drm_framebuffer *fb,
  		       struct qxl_bo *bo,
  		       unsigned int flags, unsigned int color,
  		       struct drm_clip_rect *clips,
  		       unsigned int num_clips, int inc,
  		       uint32_t dumb_shadow_offset)
  {
  	/*
  	 * TODO: if flags & DRM_MODE_FB_DIRTY_ANNOTATE_FILL then we should
  	 * send a fill command instead, much cheaper.
  	 *
  	 * See include/drm/drm_mode.h
  	 */
  	struct drm_clip_rect *clips_ptr;
  	int i;
  	int left, right, top, bottom;
  	int width, height;
  	struct qxl_drawable *drawable;
  	struct qxl_rect drawable_rect;
  	struct qxl_rect *rects;
  	int stride = fb->pitches[0];
  	/* depth is not actually interesting, we don't mask with it */
  	int depth = fb->format->cpp[0] * 8;
  	uint8_t *surface_base;
  	struct qxl_release *release;
  	struct qxl_bo *clips_bo;
  	struct qxl_drm_image *dimage;
  	int ret;
  
  	ret = alloc_drawable(qdev, &release);
  	if (ret)
  		return;
  
  	clips->x1 += dumb_shadow_offset;
  	clips->x2 += dumb_shadow_offset;
  
  	left = clips->x1;
  	right = clips->x2;
  	top = clips->y1;
  	bottom = clips->y2;
  
  	/* skip the first clip rect */
  	for (i = 1, clips_ptr = clips + inc;
  	     i < num_clips; i++, clips_ptr += inc) {
  		left = min_t(int, left, (int)clips_ptr->x1);
  		right = max_t(int, right, (int)clips_ptr->x2);
  		top = min_t(int, top, (int)clips_ptr->y1);
  		bottom = max_t(int, bottom, (int)clips_ptr->y2);
  	}
  
  	width = right - left;
  	height = bottom - top;
  
  	ret = alloc_clips(qdev, release, num_clips, &clips_bo);
  	if (ret)
  		goto out_free_drawable;
  
  	ret = qxl_image_alloc_objects(qdev, release,
  				      &dimage,
  				      height, stride);
  	if (ret)
  		goto out_free_clips;
  
  	/* do a reservation run over all the objects we just allocated */
  	ret = qxl_release_reserve_list(release, true);
  	if (ret)
  		goto out_free_image;
  
  	drawable_rect.left = left;
  	drawable_rect.right = right;
  	drawable_rect.top = top;
  	drawable_rect.bottom = bottom;
  
  	ret = make_drawable(qdev, 0, QXL_DRAW_COPY, &drawable_rect,
  			    release);
  	if (ret)
  		goto out_release_backoff;
  
  	ret = qxl_bo_kmap(bo, (void **)&surface_base);
  	if (ret)
  		goto out_release_backoff;
  
  	ret = qxl_image_init(qdev, release, dimage, surface_base,
  			     left - dumb_shadow_offset,
  			     top, width, height, depth, stride);
  	qxl_bo_kunmap(bo);
  	if (ret)
  		goto out_release_backoff;
  
  	rects = drawable_set_clipping(qdev, num_clips, clips_bo);
  	if (!rects) {
  		ret = -EINVAL;
  		goto out_release_backoff;
  	}
  	drawable = (struct qxl_drawable *)qxl_release_map(qdev, release);
  
  	drawable->clip.type = SPICE_CLIP_TYPE_RECTS;
  	drawable->clip.data = qxl_bo_physical_address(qdev,
  						      clips_bo, 0);
  
  	drawable->u.copy.src_area.top = 0;
  	drawable->u.copy.src_area.bottom = height;
  	drawable->u.copy.src_area.left = 0;
  	drawable->u.copy.src_area.right = width;
  
  	drawable->u.copy.rop_descriptor = SPICE_ROPD_OP_PUT;
  	drawable->u.copy.scale_mode = 0;
  	drawable->u.copy.mask.flags = 0;
  	drawable->u.copy.mask.pos.x = 0;
  	drawable->u.copy.mask.pos.y = 0;
  	drawable->u.copy.mask.bitmap = 0;
  
  	drawable->u.copy.src_bitmap = qxl_bo_physical_address(qdev, dimage->bo, 0);
  	qxl_release_unmap(qdev, release, &drawable->release_info);
  
  	clips_ptr = clips;
  	for (i = 0; i < num_clips; i++, clips_ptr += inc) {
  		rects[i].left   = clips_ptr->x1;
  		rects[i].right  = clips_ptr->x2;
  		rects[i].top    = clips_ptr->y1;
  		rects[i].bottom = clips_ptr->y2;
  	}
  	qxl_bo_kunmap(clips_bo);
  
  	qxl_release_fence_buffer_objects(release);
  	qxl_push_command_ring_release(qdev, release, QXL_CMD_DRAW, false);
  
  out_release_backoff:
  	if (ret)
  		qxl_release_backoff_reserve_list(release);
  out_free_image:
  	qxl_image_free_objects(qdev, dimage);
  out_free_clips:
  	qxl_bo_unref(&clips_bo);
  out_free_drawable:
  	/* only free drawable on error */
  	if (ret)
  		free_drawable(qdev, release);
  
  }
  