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gsk: Quality of life improvements for Cairo rendering

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1. Check for an empty clip region before push/pop_group() calls

2. Remove save/restore() pairs as the vfunc invocation does so already.
This commit is contained in:
Benjamin Otte 2023-12-05 17:21:30 +01:00
parent e3299e38df
commit d39ec8c09e
1 changed files with 21 additions and 16 deletions
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37
gsk/gskrendernodeimpl.c
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@ -2019,7 +2019,7 @@ has_empty_clip (cairo_t *cr)
double x1, y1, x2, y2;
cairo_clip_extents (cr, &x1, &y1, &x2, &y2);
return x1 == x2 && y1 == y2;
return x1 >= x2 || y1 >= y2;
}
static void
@ -3590,20 +3590,19 @@ gsk_opacity_node_draw (GskRenderNode *node,
{
GskOpacityNode *self = (GskOpacityNode *) node;
cairo_save (cr);
/* clip so the push_group() creates a smaller surface */
gsk_cairo_rectangle (cr, &node->bounds);
cairo_clip (cr);
if (has_empty_clip (cr))
return;
cairo_push_group (cr);
gsk_render_node_draw (self->child, cr);
cairo_pop_group_to_source (cr);
cairo_paint_with_alpha (cr, self->opacity);
cairo_restore (cr);
}
static void
@ -3800,24 +3799,23 @@ gsk_color_matrix_node_draw (GskRenderNode *node,
GskColorMatrixNode *self = (GskColorMatrixNode *) node;
cairo_pattern_t *pattern;
cairo_save (cr);
/* clip so the push_group() creates a smaller surface */
gsk_cairo_rectangle (cr, &node->bounds);
cairo_clip (cr);
if (has_empty_clip (cr))
return;
cairo_push_group (cr);
gsk_render_node_draw (self->child, cr);
pattern = cairo_pop_group (cr);
apply_color_matrix_to_pattern (pattern, &self->color_matrix, &self->color_offset);
cairo_set_source (cr, pattern);
cairo_paint (cr);
cairo_restore (cr);
cairo_pattern_destroy (pattern);
}
@ -4643,8 +4641,6 @@ gsk_stroke_node_draw (GskRenderNode *node,
{
GskStrokeNode *self = (GskStrokeNode *) node;
cairo_save (cr);
if (gsk_render_node_get_node_type (self->child) == GSK_COLOR_NODE &&
gsk_rect_contains_rect (&self->child->bounds, &node->bounds))
{
@ -4654,6 +4650,9 @@ gsk_stroke_node_draw (GskRenderNode *node,
{
gsk_cairo_rectangle (cr, &self->child->bounds);
cairo_clip (cr);
if (has_empty_clip (cr))
return;
cairo_push_group (cr);
gsk_render_node_draw (self->child, cr);
cairo_pop_group_to_source (cr);
@ -4663,8 +4662,6 @@ gsk_stroke_node_draw (GskRenderNode *node,
gsk_path_to_cairo (self->path, cr);
cairo_stroke (cr);
cairo_restore (cr);
}
static void
@ -4848,10 +4845,11 @@ gsk_shadow_node_draw (GskRenderNode *node,
GskShadowNode *self = (GskShadowNode *) node;
gsize i;
cairo_save (cr);
/* clip so the blur area stays small */
gsk_cairo_rectangle (cr, &node->bounds);
cairo_clip (cr);
if (has_empty_clip (cr))
return;
for (i = 0; i < self->n_shadows; i++)
{
@ -4879,8 +4877,6 @@ gsk_shadow_node_draw (GskRenderNode *node,
}
gsk_render_node_draw (self->child, cr);
cairo_restore (cr);
}
static void
@ -5142,6 +5138,9 @@ gsk_blend_node_draw (GskRenderNode *node,
{
GskBlendNode *self = (GskBlendNode *) node;
if (has_empty_clip (cr))
return;
cairo_push_group (cr);
gsk_render_node_draw (self->bottom, cr);
@ -5309,6 +5308,9 @@ gsk_cross_fade_node_draw (GskRenderNode *node,
{
GskCrossFadeNode *self = (GskCrossFadeNode *) node;
if (has_empty_clip (cr))
return;
cairo_push_group_with_content (cr, CAIRO_CONTENT_COLOR_ALPHA);
gsk_render_node_draw (self->start, cr);
@ -6143,6 +6145,9 @@ gsk_mask_node_draw (GskRenderNode *node,
graphene_matrix_t color_matrix;
graphene_vec4_t color_offset;
if (has_empty_clip (cr))
return;
cairo_push_group (cr);
gsk_render_node_draw (self->source, cr);
cairo_pop_group_to_source (cr);