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backends: implement custom EGL and renderer initialization

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Compositors now have more control over how the backend creates its
renderer. Currently all backends create an EGL/GLES2 renderer, so
the necessary attributes for creating the context are passed to a
user-provided callback function. It is responsible for initializing
provided wlr_egl and to return a renderer. On fail, return 0.

Fixes #987
This commit is contained in:
Ilia Bozhinov 2018-05-25 13:14:35 +03:00
parent a0eb37e2ea
commit 24cf70ae96
22 changed files with 106 additions and 69 deletions
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19
backend/headless/backend.c
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@ -78,7 +78,8 @@ static void handle_display_destroy(struct wl_listener *listener, void *data) {
backend_destroy(&backend->backend);
}
struct wlr_backend *wlr_headless_backend_create(struct wl_display *display) {
struct wlr_backend *wlr_headless_backend_create(struct wl_display *display,
wlr_renderer_create_func_t create_renderer_func) {
wlr_log(L_INFO, "Creating headless backend");
struct wlr_headless_backend *backend =
@ -101,16 +102,18 @@ struct wlr_backend *wlr_headless_backend_create(struct wl_display *display) {
EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
EGL_NONE,
};
bool ok = wlr_egl_init(&backend->egl, EGL_PLATFORM_SURFACELESS_MESA, NULL,
(EGLint *)config_attribs, 0);
if (!ok) {
free(backend);
return NULL;
if (!create_renderer_func) {
create_renderer_func = wlr_renderer_autocreate;
}
backend->renderer = wlr_gles2_renderer_create(&backend->egl);
if (backend->renderer == NULL) {
backend->renderer = create_renderer_func(&backend->egl, EGL_PLATFORM_SURFACELESS_MESA,
NULL, (EGLint*)config_attribs, 0);
if (!backend->renderer) {
wlr_log(L_ERROR, "Failed to create renderer");
free(backend);
return NULL;
}
backend->display_destroy.notify = handle_display_destroy;