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gpu: Try largest clip rect first

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When trying to cull, try culling from the largest rectangle of the
remaining draw region first. That region has the biggest chance of
containing a large area to skip.

As a side effect, we can stop trying to cull once the largest rectangle
isn't big enough anymore to contain anything worth culling.
This commit is contained in:
Benjamin Otte 2024-08-04 07:03:37 +02:00
parent 852ecf7c20
commit 57e21683a6
1 changed files with 17 additions and 4 deletions
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21
gsk/gpu/gskgpunodeprocessor.c
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@ -4030,12 +4030,24 @@ gsk_gpu_node_processor_render (GskGpuFrame *frame,
GskRenderPassType pass_type)
{
GskGpuNodeProcessor self;
int i, n, best, best_size;
cairo_rectangle_int_t rect;
while (cairo_region_num_rectangles (clip) > 0)
while ((n = cairo_region_num_rectangles (clip)) > 0)
{
cairo_rectangle_int_t rect;
best = -1;
best_size = 0;
for (i = 0; i < n; i++)
{
cairo_region_get_rectangle (clip, i, &rect);
if (rect.width * rect.height > best_size)
{
best = i;
best_size = rect.width * rect.height;
}
}
cairo_region_get_rectangle (clip, 0, &rect);
cairo_region_get_rectangle (clip, best, &rect);
gsk_gpu_node_processor_init (&self,
frame,
@ -4044,7 +4056,8 @@ gsk_gpu_node_processor_render (GskGpuFrame *frame,
&rect,
viewport);
if (!gsk_gpu_frame_should_optimize (frame, GSK_GPU_OPTIMIZE_OCCLUSION_CULLING) ||
if (best_size < MIN_PIXELS_FOR_OCCLUSION_PASS ||
!gsk_gpu_frame_should_optimize (frame, GSK_GPU_OPTIMIZE_OCCLUSION_CULLING) ||
!gsk_gpu_node_processor_add_first_node (&self,
target,
pass_type,