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render: add wlr_renderer_begin_with_buffer 

This allows compositors to choose a wlr_buffer to render to. This
is a less awkward interface than having to call bind_buffer() before
and after begin() and end().

Closes: https://github.com/swaywm/wlroots/issues/2618
This commit is contained in:
Simon Ser 2021-06-01 15:55:30 +02:00 committed by Simon Zeni
parent b732f094c6
commit 6430230d1f
2 changed files with 18 additions and 0 deletions
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3
include/wlr/render/wlr_renderer.h
View File

@ -27,6 +27,7 @@ struct wlr_renderer {
const struct wlr_renderer_impl *impl;
bool rendering;
bool rendering_with_buffer;
struct {
struct wl_signal destroy;
@ -36,6 +37,8 @@ struct wlr_renderer {
struct wlr_renderer *wlr_renderer_autocreate(struct wlr_backend *backend);
void wlr_renderer_begin(struct wlr_renderer *r, uint32_t width, uint32_t height);
bool wlr_renderer_begin_with_buffer(struct wlr_renderer *r,
struct wlr_buffer *buffer);
void wlr_renderer_end(struct wlr_renderer *r);
void wlr_renderer_clear(struct wlr_renderer *r, const float color[static 4]);
/**

15
render/wlr_renderer.c
View File

@ -66,6 +66,16 @@ void wlr_renderer_begin(struct wlr_renderer *r, uint32_t width, uint32_t height)
r->rendering = true;
}
bool wlr_renderer_begin_with_buffer(struct wlr_renderer *r,
struct wlr_buffer *buffer) {
if (!wlr_renderer_bind_buffer(r, buffer)) {
return false;
}
wlr_renderer_begin(r, buffer->width, buffer->height);
r->rendering_with_buffer = true;
return true;
}
void wlr_renderer_end(struct wlr_renderer *r) {
assert(r->rendering);
@ -74,6 +84,11 @@ void wlr_renderer_end(struct wlr_renderer *r) {
}
r->rendering = false;
if (r->rendering_with_buffer) {
wlr_renderer_bind_buffer(r, NULL);
r->rendering_with_buffer = false;
}
}
void wlr_renderer_clear(struct wlr_renderer *r, const float color[static 4]) {