gl-renderer: remove EGLConfig attributes from API

Now that all backends pass in a list of acceptable DRM formats, that is used to
determine if the EGLConfig has an alpha channel or not. Therefore the
opaque_attribs and alpha_attribs are now useless, and we can remove the whole
config_attribs argument from the API.

gl_renderer_get_egl_config() uses an internal attrib list that matches at least
the union of the opaque_attribs and alpha_attribs matches.

Overall, behaviour should remain unchanged.

The new attribute array becomes variable in the future, so it is left
non-const.

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

libweston/renderer-gl/egl-glue.c

@@ -187,7 +187,6 @@ out:
 
 EGLConfig
 gl_renderer_get_egl_config(struct gl_renderer *gr,
-			   const EGLint *config_attribs,
 			   const uint32_t *drm_formats,
 			   unsigned drm_formats_count)
 {
@@ -195,6 +194,14 @@ gl_renderer_get_egl_config(struct gl_renderer *gr,
 	const struct pixel_format_info *pinfo[16];
 	unsigned pinfo_count;
 	unsigned i;
+	EGLint config_attribs[] = {
+		EGL_SURFACE_TYPE,    EGL_WINDOW_BIT,
+		EGL_RED_SIZE,        1,
+		EGL_GREEN_SIZE,      1,
+		EGL_BLUE_SIZE,       1,
+		EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
+		EGL_NONE
+	};
 
 	assert(drm_formats_count < ARRAY_LENGTH(pinfo));
 	drm_formats_count = MIN(drm_formats_count, ARRAY_LENGTH(pinfo));

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

@@ -138,7 +138,6 @@ egl_choose_config(struct gl_renderer *gr,
 
 EGLConfig
 gl_renderer_get_egl_config(struct gl_renderer *gr,
-			   const EGLint *config_attribs,
 			   const uint32_t *drm_formats,
 			   unsigned drm_formats_count);
 

libweston/renderer-gl/gl-renderer.c

@@ -3061,14 +3061,13 @@ static EGLSurface
 gl_renderer_create_window_surface(struct gl_renderer *gr,
 				  EGLNativeWindowType window_for_legacy,
 				  void *window_for_platform,
-				  const EGLint *config_attribs,
 				  const uint32_t *drm_formats,
 				  unsigned drm_formats_count)
 {
 	EGLSurface egl_surface = EGL_NO_SURFACE;
 	EGLConfig egl_config;
 
-	egl_config = gl_renderer_get_egl_config(gr, config_attribs,
+	egl_config = gl_renderer_get_egl_config(gr,
 						drm_formats, drm_formats_count);
 	if (egl_config == EGL_NO_CONFIG_KHR)
 		return EGL_NO_SURFACE;
@@ -3118,7 +3117,6 @@ static int
 gl_renderer_output_window_create(struct weston_output *output,
 				 EGLNativeWindowType window_for_legacy,
 				 void *window_for_platform,
-				 const EGLint *config_attribs,
 				 const uint32_t *drm_formats,
 				 unsigned drm_formats_count)
 {
@@ -3130,7 +3128,6 @@ gl_renderer_output_window_create(struct weston_output *output,
 	egl_surface = gl_renderer_create_window_surface(gr,
 							window_for_legacy,
 							window_for_platform,
-							config_attribs,
 							drm_formats,
 							drm_formats_count);
 	if (egl_surface == EGL_NO_SURFACE) {
@@ -3234,27 +3231,6 @@ gl_renderer_destroy(struct weston_compositor *ec)
 	free(gr);
 }
 
-static const EGLint gl_renderer_opaque_attribs[] = {
-	EGL_SURFACE_TYPE, EGL_WINDOW_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 gl_renderer_alpha_attribs[] = {
-	EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
-	EGL_RED_SIZE, 1,
-	EGL_GREEN_SIZE, 1,
-	EGL_BLUE_SIZE, 1,
-	EGL_ALPHA_SIZE, 1,
-	EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
-	EGL_NONE
-};
-
-
 /** Checks whether a platform EGL client extension is supported
  *
  * \param ec The weston compositor
@@ -3387,7 +3363,6 @@ static int
 gl_renderer_display_create(struct weston_compositor *ec,
 			   EGLenum platform,
 			   void *native_display,
-			   const EGLint *config_attribs,
 			   const uint32_t *drm_formats,
 			   unsigned drm_formats_count)
 {
@@ -3461,7 +3436,7 @@ 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, config_attribs,
+		gr->egl_config = gl_renderer_get_egl_config(gr,
 							    drm_formats,
 							    drm_formats_count);
 		if (gr->egl_config == EGL_NO_CONFIG_KHR) {
@@ -3749,9 +3724,6 @@ gl_renderer_setup(struct weston_compositor *ec, EGLSurface egl_surface)
 }
 
 WL_EXPORT struct gl_renderer_interface gl_renderer_interface = {
-	.opaque_attribs = gl_renderer_opaque_attribs,
-	.alpha_attribs = gl_renderer_alpha_attribs,
-
 	.display_create = gl_renderer_display_create,
 	.output_window_create = gl_renderer_output_window_create,
 	.output_destroy = gl_renderer_output_destroy,

libweston/renderer-gl/gl-renderer.h

@@ -57,20 +57,15 @@ enum gl_renderer_border_side {
 };
 
 struct gl_renderer_interface {
-	const EGLint *opaque_attribs;
-	const EGLint *alpha_attribs;
-
 	int (*display_create)(struct weston_compositor *ec,
 			      EGLenum platform,
 			      void *native_display,
-			      const EGLint *config_attribs,
 			      const uint32_t *drm_formats,
 			      unsigned drm_formats_count);
 
 	int (*output_window_create)(struct weston_output *output,
 				    EGLNativeWindowType window_for_legacy,
 				    void *window_for_platform,
-				    const EGLint *config_attribs,
 				    const uint32_t *drm_formats,
 				    unsigned drm_formats_count);