Ignore overlay texture when hardware accelerated

This fixes an issue where opening an <input type="date"> would result in
flickering between the base texture & a smaller texture of the date
picker. This brings behaviour in line with non-accelerated rendering.

Ideally PET_POPUP textures (both accelerated & not) should be properly
stored and rendered on top of the bs->texture displayed to the user.

For more info see #148

browser-client.cpp

@@ -219,6 +219,7 @@ void BrowserClient::OnPaint(CefRefPtr<CefBrowser>, PaintElementType type,
 			    int height)
 {
 	if (type != PET_VIEW) {
+		// TODO Overlay texture on top of bs->texture
 		return;
 	}
 
@@ -255,9 +256,15 @@ void BrowserClient::OnPaint(CefRefPtr<CefBrowser>, PaintElementType type,
 }
 
 #ifdef SHARED_TEXTURE_SUPPORT_ENABLED
-void BrowserClient::OnAcceleratedPaint(CefRefPtr<CefBrowser>, PaintElementType,
-				       const RectList &, void *shared_handle)
+void BrowserClient::OnAcceleratedPaint(CefRefPtr<CefBrowser>,
+				       PaintElementType type, const RectList &,
+				       void *shared_handle)
 {
+	if (type != PET_VIEW) {
+		// TODO Overlay texture on top of bs->texture
+		return;
+	}
+
 	if (!bs) {
 		return;
 	}