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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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10
include/wlr/backend.h
View file

@ -20,12 +20,20 @@ struct wlr_backend {
} events;
};
typedef struct wlr_renderer *(*wlr_renderer_create_func_t)(struct wlr_egl *egl, EGLenum platform,
void *remote_display, EGLint *config_attribs, EGLint visual_id);
/**
* Automatically initializes the most suitable backend given the environment.
* Will always return a multibackend. The backend is created but not started.
* Returns NULL on failure.
*
* The compositor can request to initialize the backend's renderer by setting
* the create_render_func. The callback must initialize the given wlr_egl and
* return a valid wlr_renderer, or NULL if it has failed to initiaze it.
* Pass NULL as create_renderer_func to use the backend's default renderer.
*/
struct wlr_backend *wlr_backend_autocreate(struct wl_display *display);
struct wlr_backend *wlr_backend_autocreate(struct wl_display *display,
wlr_renderer_create_func_t create_renderer_func);
/**
* Start the backend. This may signal new_input or new_output immediately, but
* may also wait until the display's event loop begins. Returns false on