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backend: automatically create renderer

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If a backend accepts buffers (as indicated by get_buffer_caps) but
doesn't implement get_renderer, automatically create a renderer.
This commit is contained in:
Simon Ser 2021-04-28 23:22:46 +02:00 committed by Kenny Levinsen
parent 7ec5bf6b10
commit bcabe34a2e
2 changed files with 28 additions and 0 deletions
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24
backend/backend.c
View file

@ -15,6 +15,7 @@
#include <wlr/backend/session.h>
#include <wlr/backend/wayland.h>
#include <wlr/config.h>
#include <wlr/render/wlr_renderer.h>
#include <wlr/util/log.h>
#include "backend/backend.h"
#include "backend/multi.h"
@ -35,6 +36,7 @@ void wlr_backend_init(struct wlr_backend *backend,
void wlr_backend_finish(struct wlr_backend *backend) {
wlr_signal_emit_safe(&backend->events.destroy, backend);
wlr_renderer_destroy(backend->renderer);
}
bool wlr_backend_start(struct wlr_backend *backend) {
@ -56,10 +58,32 @@ void wlr_backend_destroy(struct wlr_backend *backend) {
}
}
static bool backend_create_renderer(struct wlr_backend *backend) {
if (backend->renderer != NULL) {
return true;
}
backend->renderer = wlr_renderer_autocreate(backend);
if (backend->renderer == NULL) {
return false;
}
return true;
}
struct wlr_renderer *wlr_backend_get_renderer(struct wlr_backend *backend) {
if (backend->impl->get_renderer) {
return backend->impl->get_renderer(backend);
}
if (backend_get_buffer_caps(backend) != 0) {
// If the backend is capable of presenting buffers, automatically create
// the renderer if necessary.
if (!backend_create_renderer(backend)) {
wlr_log(WLR_ERROR, "Failed to create backend renderer");
return NULL;
}
return backend->renderer;
}
return NULL;
}

4
include/wlr/backend.h
View file

@ -25,6 +25,10 @@ struct wlr_backend {
/** Raised when new outputs are added, passed the wlr_output */
struct wl_signal new_output;
} events;
// Private state
struct wlr_renderer *renderer;
};
/**