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ngl: Special-case CSS backgrounds

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Recognize the rounded-clip-with-color-inside situation
and do manual nine-slicing for it to minimize the number
of pixels send through clipping shaders.
This commit is contained in:
Matthias Clasen
2021-03-09 18:54:29 -05:00
parent a041c18676
commit 70bf1ed0e4
1 changed files with 88 additions and 0 deletions
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88
gsk/ngl/gsknglrenderjob.c
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@@ -1635,6 +1635,84 @@ gsk_ngl_render_job_visit_clip_node (GskNglRenderJob *job,
gsk_ngl_render_job_visit_clipped_child (job, child, clip);
}
static inline void
gsk_ngl_render_job_visit_rounded_color_node (GskNglRenderJob *job,
const GskRenderNode *node)
{
const GskRenderNode *child = gsk_rounded_clip_node_get_child (node);
const GskRoundedRect *clip = gsk_rounded_clip_node_get_clip (node);
const graphene_rect_t *outer;
graphene_rect_t inner;
graphene_rect_t rect;
outer = &node->bounds;
rounded_rect_get_inner (clip, &inner);
graphene_rect_intersection (outer, &inner, &inner);
gsk_ngl_render_job_begin_draw (job, job->driver->color);
gsk_ngl_program_set_uniform_color (job->current_program,
UNIFORM_COLOR_COLOR, 0,
gsk_color_node_get_color (child));
/* top left */
rect.origin.x = outer->origin.x;
rect.origin.y = outer->origin.y;
rect.size.width = inner.origin.x - rect.origin.x;
rect.size.height = inner.origin.y - rect.origin.y;
gsk_ngl_render_job_draw_rect (job, &rect);
/* top right */
rect.origin.x = inner.origin.x + inner.size.width;
rect.origin.y = outer->origin.y;
rect.size.width = outer->origin.x + outer->size.width - rect.origin.x;
rect.size.height = inner.origin.y - rect.origin.y;
gsk_ngl_render_job_draw_rect (job, &rect);
/* bottom right */
rect.origin.x = inner.origin.x + inner.size.width;
rect.origin.y = inner.origin.y + inner.size.height;
rect.size.width = outer->origin.x + outer->size.width - rect.origin.x;
rect.size.height = outer->origin.y + outer->size.height - rect.origin.y;
gsk_ngl_render_job_draw_rect (job, &rect);
/* bottom left */
rect.origin.x = outer->origin.x;
rect.origin.y = inner.origin.y + inner.size.height;
rect.size.width = inner.origin.x - rect.origin.x;
rect.size.height = outer->origin.y + outer->size.height - rect.origin.y;
gsk_ngl_render_job_draw_rect (job, &rect);
gsk_ngl_render_job_end_draw (job);
gsk_ngl_render_job_begin_draw (job, job->driver->color_no_clip);
gsk_ngl_program_set_uniform_color (job->current_program,
UNIFORM_COLOR_COLOR, 0,
gsk_color_node_get_color (child));
/* left side */
rect.origin.x = outer->origin.x;
rect.origin.y = inner.origin.y;
rect.size.width = inner.origin.x - rect.origin.x;
rect.size.height = inner.size.height;
gsk_ngl_render_job_draw_rect (job, &rect);
/* center */
rect.origin.x = inner.origin.x;
rect.origin.y = outer->origin.y;
rect.size.width = inner.size.width;
rect.size.height = outer->size.height;
gsk_ngl_render_job_draw_rect (job, &rect);
/* right side */
rect.origin.x = inner.origin.x + inner.size.width;
rect.origin.y = inner.origin.y;
rect.size.width = outer->origin.x + outer->size.width - rect.origin.x;
rect.size.height = inner.size.height;
gsk_ngl_render_job_draw_rect (job, &rect);
gsk_ngl_render_job_end_draw (job);
}
static inline void
gsk_ngl_render_job_visit_rounded_clip_node (GskNglRenderJob *job,
const GskRenderNode *node)
@@ -1657,6 +1735,16 @@ gsk_ngl_render_job_visit_rounded_clip_node (GskNglRenderJob *job,
transformed_clip.corner[i].height = clip->corner[i].height * scale_y;
}
if (gsk_render_node_get_node_type (child) == GSK_COLOR_NODE &&
job->current_clip->is_fully_contained)
{
/* special-case CSS backgrounds */
gsk_ngl_render_job_push_clip (job, &transformed_clip);
gsk_ngl_render_job_visit_rounded_color_node (job, node);
gsk_ngl_render_job_pop_clip (job);
return;
}
if (job->current_clip->is_rectilinear)
{
GskRoundedRect intersected_clip;