gl-renderer: configs for pbuffers too

Fold more code into the common config choosing, the pbuffer path this time.
Simplifies code and allows gl_renderer_get_egl_config() to grow smarter in the
future to guarantee config compatility in the absence of configless_context
extension.

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

libweston/renderer-gl/egl-glue.c

@@ -132,7 +132,7 @@ egl_config_pixel_format_matches(struct gl_renderer *gr,
 	return true;
 }
 
-int
+static int
 egl_choose_config(struct gl_renderer *gr,
 		  const EGLint *attribs,
 		  const struct pixel_format_info *const *pinfo,
@@ -187,6 +187,7 @@ out:
 
 EGLConfig
 gl_renderer_get_egl_config(struct gl_renderer *gr,
+			   EGLint egl_surface_type,
 			   const uint32_t *drm_formats,
 			   unsigned drm_formats_count)
 {
@@ -195,7 +196,7 @@ gl_renderer_get_egl_config(struct gl_renderer *gr,
 	unsigned pinfo_count;
 	unsigned i;
 	EGLint config_attribs[] = {
-		EGL_SURFACE_TYPE,    EGL_WINDOW_BIT,
+		EGL_SURFACE_TYPE,    egl_surface_type,
 		EGL_RED_SIZE,        1,
 		EGL_GREEN_SIZE,      1,
 		EGL_BLUE_SIZE,       1,

libweston/renderer-gl/gl-renderer-internal.h

@@ -127,17 +127,9 @@ gl_renderer_print_egl_error_state(void);
 void
 log_egl_config_info(EGLDisplay egldpy, EGLConfig eglconfig);
 
-struct pixel_format_info;
-
-int
-egl_choose_config(struct gl_renderer *gr,
-		  const EGLint *attribs,
-		  const struct pixel_format_info *const *pinfo,
-		  unsigned pinfo_count,
-		  EGLConfig *config_out);
-
 EGLConfig
 gl_renderer_get_egl_config(struct gl_renderer *gr,
+			   EGLint egl_surface_type,
 			   const uint32_t *drm_formats,
 			   unsigned drm_formats_count);
 

libweston/renderer-gl/gl-renderer.c

@@ -3067,7 +3067,7 @@ gl_renderer_create_window_surface(struct gl_renderer *gr,
 	EGLSurface egl_surface = EGL_NO_SURFACE;
 	EGLConfig egl_config;
 
-	egl_config = gl_renderer_get_egl_config(gr,
+	egl_config = gl_renderer_get_egl_config(gr, EGL_WINDOW_BIT,
 						drm_formats, drm_formats_count);
 	if (egl_config == EGL_NO_CONFIG_KHR)
 		return EGL_NO_SURFACE;
@@ -3325,24 +3325,15 @@ output_handle_destroy(struct wl_listener *listener, void *data)
 static int
 gl_renderer_create_pbuffer_surface(struct gl_renderer *gr) {
 	EGLConfig pbuffer_config;
-
-	static const EGLint pbuffer_config_attribs[] = {
-		EGL_SURFACE_TYPE, EGL_PBUFFER_BIT,
-		EGL_RED_SIZE, 1,
-		EGL_GREEN_SIZE, 1,
-		EGL_BLUE_SIZE, 1,
-		EGL_ALPHA_SIZE, 0,
-		EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
-		EGL_NONE
-	};
-
 	static const EGLint pbuffer_attribs[] = {
 		EGL_WIDTH, 10,
 		EGL_HEIGHT, 10,
 		EGL_NONE
 	};
 
-	if (egl_choose_config(gr, pbuffer_config_attribs, NULL, 0, &pbuffer_config) < 0) {
+	pbuffer_config = gl_renderer_get_egl_config(gr, EGL_PBUFFER_BIT,
+						    NULL, 0);
+	if (pbuffer_config == EGL_NO_CONFIG_KHR) {
 		weston_log("failed to choose EGL config for PbufferSurface\n");
 		return -1;
 	}
@@ -3436,7 +3427,7 @@ gl_renderer_display_create(struct weston_compositor *ec,
 		goto fail_with_error;
 
 	if (!gr->has_configless_context) {
-		gr->egl_config = gl_renderer_get_egl_config(gr,
+		gr->egl_config = gl_renderer_get_egl_config(gr, EGL_WINDOW_BIT,
 							    drm_formats,
 							    drm_formats_count);
 		if (gr->egl_config == EGL_NO_CONFIG_KHR) {