backends: implement custom EGL and renderer initialization

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

1 files changed, 4 insertions, 0 deletions

diff --git a/include/wlr/render/wlr_renderer.h b/include/wlr/render/wlr_renderer.h
index 21f9c16c..ec87201b 100644
--- a/include/wlr/render/wlr_renderer.h
+++ b/include/wlr/render/wlr_renderer.h
@@ -3,6 +3,7 @@
 
 #include <stdint.h>
 #include <wayland-server-protocol.h>
+#include <wlr/render/egl.h>
 #include <wlr/render/wlr_texture.h>
 #include <wlr/types/wlr_box.h>
 
@@ -16,6 +17,9 @@ struct wlr_renderer {
 	} events;
 };
 
+struct wlr_renderer *wlr_renderer_autocreate(struct wlr_egl *egl, EGLenum platform,
+	void *remote_display, EGLint *config_attribs, EGLint visual_id);
+
 void wlr_renderer_begin(struct wlr_renderer *r, int width, int height);
 void wlr_renderer_end(struct wlr_renderer *r);
 void wlr_renderer_clear(struct wlr_renderer *r, const float color[static 4]);