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gl-renderer: Cache and defer blend state update to draw call

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This slightly minimises state changes.

Signed-off-by: Loïc Molinari <loic.molinari@collabora.com>
This commit is contained in:
Loïc Molinari 2024-11-11 14:29:50 +01:00 • committed by Daniel Stone
parent e18e3b6c4a
commit da393fd468
2 changed files with 21 additions and 9 deletions
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2
libweston/renderer-gl/gl-renderer-internal.h
View file

@ -485,6 +485,8 @@ struct gl_renderer {
GLenum pbo_usage;
enum gl_bgra8_texture_support bgra8_texture_support;
bool blend_state;
struct wl_list dmabuf_images;
struct wl_list dmabuf_formats;
struct wl_list pending_capture_list;

28
libweston/renderer-gl/gl-renderer.c
View file

@ -1636,6 +1636,20 @@ set_debug_mode(struct gl_renderer *gr,
}
}
static void
set_blend_state(struct gl_renderer *gr,
bool state)
{
if (gr->blend_state == state)
return;
if (state)
glEnable(GL_BLEND);
else
glDisable(GL_BLEND);
gr->blend_state = state;
}
static void
draw_mesh(struct gl_renderer *gr,
struct weston_paint_node *pnode,
@ -1652,6 +1666,8 @@ draw_mesh(struct gl_renderer *gr,
assert(nidx > 0);
set_blend_state(gr, !opaque || pnode->view->alpha < 1.0);
/* Prevent translucent surfaces from punching holes through the
* renderbuffer. */
if (gb->shader_variant == SHADER_VARIANT_RGBA) {
@ -1823,11 +1839,6 @@ draw_paint_node(struct weston_paint_node *pnode,
prepare_placeholder(&sconf, pnode);
if (pixman_region32_not_empty(&surface_opaque)) {
if (pnode->view->alpha < 1.0)
glEnable(GL_BLEND);
else
glDisable(GL_BLEND);
transform_damage(pnode, &repaint, &quads, &nquads);
repaint_region(gr, pnode, quads, nquads, &surface_opaque,
&sconf, true);
@ -1835,7 +1846,6 @@ draw_paint_node(struct weston_paint_node *pnode,
}
if (pixman_region32_not_empty(&surface_blend)) {
glEnable(GL_BLEND);
transform_damage(pnode, &repaint, &quads, &nquads);
repaint_region(gr, pnode, quads, nquads, &surface_blend, &sconf,
false);
@ -2152,7 +2162,7 @@ draw_output_borders(struct weston_output *output,
return;
}
glDisable(GL_BLEND);
set_blend_state(gr, false);
glViewport(0, 0, fb->width, fb->height);
weston_matrix_init(&sconf.projection);
@ -2307,7 +2317,7 @@ blit_shadow_to_output(struct weston_output *output,
pixman_region32_init(&translated_damage);
gl_renderer_use_program(gr, &sconf);
glDisable(GL_BLEND);
set_blend_state(gr, false);
/* output_damage is in global coordinates */
pixman_region32_intersect(&translated_damage, output_damage,
@ -3813,7 +3823,7 @@ gl_renderer_surface_copy_content(struct weston_surface *surface,
}
glViewport(0, 0, cw, ch);
glDisable(GL_BLEND);
set_blend_state(gr, false);
if (buffer->buffer_origin == ORIGIN_TOP_LEFT)
ARRAY_COPY(sconf.projection.d, projmat_normal);
else