render/gles2: query alpha size from render buffer
If we're using a render buffer, query the alpha size from it.
Closes:
@@ -453,7 +453,12 @@ static enum wl_shm_format gles2_preferred_read_format(
pop_gles2_debug(renderer);
EGLint alpha_size = -1;
- if (renderer->egl->config != EGL_NO_CONFIG_KHR) {
+ if (renderer->current_buffer != NULL) {
+ glBindRenderbuffer(GL_RENDERBUFFER, renderer->current_buffer->rbo);
+ glGetRenderbufferParameteriv(GL_RENDERBUFFER,
+ GL_RENDERBUFFER_ALPHA_SIZE, &alpha_size);
+ glBindRenderbuffer(GL_RENDERBUFFER, 0);
+ } else if (renderer->egl->config != EGL_NO_CONFIG_KHR) {
eglGetConfigAttrib(renderer->egl->display, renderer->egl->config,
EGL_ALPHA_SIZE, &alpha_size);
}
