render/gles2: don't eglGetConfigAttrib on EGL_NO_CONFIG_KHR
If we don't have an EGL config, don't try to query anything from it.
@@ -453,8 +453,10 @@ 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) {
eglGetConfigAttrib(renderer->egl->display, renderer->egl->config,
EGL_ALPHA_SIZE, &alpha_size);
+ }
const struct wlr_gles2_pixel_format *fmt =
get_gles2_format_from_gl(gl_format, gl_type, alpha_size > 0);
