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render: add support for clearing render passes

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introduces a new `wlr_render_pass_clear` function, allowing
render passes to be cleared with a solid color.
This commit is contained in:
YaoBing Xiao 2026-01-31 21:45:12 +08:00
parent 7cb4e30bfd
commit eeecb382cc
8 changed files with 120 additions and 8 deletions
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31
render/gles2/pass.c
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@ -275,10 +275,41 @@ static void render_pass_add_rect(struct wlr_render_pass *wlr_pass,
pop_gles2_debug(renderer);
}
static void render_pass_clear(struct wlr_render_pass *wlr_pass,
const struct wlr_render_clear_options *options) {
struct wlr_gles2_render_pass *pass = get_render_pass(wlr_pass);
struct wlr_gles2_renderer *renderer = pass->buffer->renderer;
push_gles2_debug(renderer);
const struct wlr_render_color *color = &options->color;
glClearColor(color->r, color->g, color->b, color->a);
if (options->clip) {
int rects_len;
const pixman_box32_t *rects = pixman_region32_rectangles(options->clip, &rects_len);
glEnable(GL_SCISSOR_TEST);
for (int i = 0; i < rects_len; i++) {
const pixman_box32_t *rect = &rects[i];
int height = pass->buffer->buffer->height;
glScissor(rect->x1, height - rect->y2,
rect->x2 - rect->x1, rect->y2 - rect->y1);
glClear(GL_COLOR_BUFFER_BIT);
}
glDisable(GL_SCISSOR_TEST);
} else {
glClear(GL_COLOR_BUFFER_BIT);
}
pop_gles2_debug(renderer);
}
static const struct wlr_render_pass_impl render_pass_impl = {
.submit = render_pass_submit,
.add_texture = render_pass_add_texture,
.add_rect = render_pass_add_rect,
.clear = render_pass_clear,
};
static const char *reset_status_str(GLenum status) {