gl-renderer: display_create needs surface type

In case the base EGLConfig is needed, gl_renderer_display_create() needs to
know it should use EGL_WINDOW_BIT or EGL_PBUFFER_BIT.

The PBUFFER case is added for when the headless backend will grow GL-renderer
support.

Signed-off-by: Pekka Paalanen <pekka.paalanen@collabora.com>

libweston/backend-drm/drm.c

@@ -747,6 +747,7 @@ drm_backend_create_gl_renderer(struct drm_backend *b)
 	if (gl_renderer->display_create(b->compositor,
 					EGL_PLATFORM_GBM_KHR,
 					(void *)b->gbm,
+					EGL_WINDOW_BIT,
 					format,
 					n_formats) < 0) {
 		return -1;

libweston/backend-wayland/wayland.c

@@ -2773,6 +2773,7 @@ wayland_backend_create(struct weston_compositor *compositor,
 		if (gl_renderer->display_create(compositor,
 						EGL_PLATFORM_WAYLAND_KHR,
 						b->parent.wl_display,
+						EGL_WINDOW_BIT,
 						wayland_formats,
 						ARRAY_LENGTH(wayland_formats)) < 0) {
 			weston_log("Failed to initialize the GL renderer; "

libweston/backend-x11/x11.c

@@ -1813,6 +1813,7 @@ init_gl_renderer(struct x11_backend *b)
 
 	ret = gl_renderer->display_create(b->compositor, EGL_PLATFORM_X11_KHR,
 					  (void *) b->dpy,
+					  EGL_WINDOW_BIT,
 					  x11_formats,
 					  ARRAY_LENGTH(x11_formats));
 

libweston/renderer-gl/gl-renderer.c

@@ -3354,6 +3354,7 @@ static int
 gl_renderer_display_create(struct weston_compositor *ec,
 			   EGLenum platform,
 			   void *native_display,
+			   EGLint egl_surface_type,
 			   const uint32_t *drm_formats,
 			   unsigned drm_formats_count)
 {
@@ -3427,13 +3428,11 @@ gl_renderer_display_create(struct weston_compositor *ec,
 		goto fail_with_error;
 
 	if (!gr->has_configless_context) {
-		EGLint surface_type = EGL_WINDOW_BIT;
-
 		if (!gr->has_surfaceless_context)
-			surface_type |= EGL_PBUFFER_BIT;
+			egl_surface_type |= EGL_PBUFFER_BIT;
 
 		gr->egl_config = gl_renderer_get_egl_config(gr,
-							    surface_type,
+							    egl_surface_type,
 							    drm_formats,
 							    drm_formats_count);
 		if (gr->egl_config == EGL_NO_CONFIG_KHR) {

libweston/renderer-gl/gl-renderer.h

@@ -46,6 +46,8 @@ typedef void *EGLConfig;
 typedef intptr_t EGLNativeDisplayType;
 typedef intptr_t EGLNativeWindowType;
 #define EGL_DEFAULT_DISPLAY ((EGLNativeDisplayType)0)
+#define EGL_PBUFFER_BIT                   0x0001
+#define EGL_WINDOW_BIT                    0x0004
 
 #endif /* ENABLE_EGL */
 
@@ -60,6 +62,7 @@ struct gl_renderer_interface {
 	int (*display_create)(struct weston_compositor *ec,
 			      EGLenum platform,
 			      void *native_display,
+			      EGLint egl_surface_type,
 			      const uint32_t *drm_formats,
 			      unsigned drm_formats_count);