- if (!iosurface_->HasIOSurface() || context_->cgl_context() != glContext) {
- glClearColor(1, 1, 1, 1);
- glClear(GL_COLOR_BUFFER_BIT);
- return;
- }
-
- // The correct viewport to cover the layer will be set up by the caller.
- // Transform this into a window size for DrawIOSurface, where it will be
- // transformed back into this viewport.
- GLint viewport[4];
- glGetIntegerv(GL_VIEWPORT, viewport);
- gfx::Rect window_rect(viewport[0], viewport[1], viewport[2], viewport[3]);
- float window_scale_factor = 1.f;
- if ([self respondsToSelector:(@selector(contentsScale))])
- window_scale_factor = [self contentsScale];
- window_rect = ToNearestRect(
- gfx::ScaleRect(window_rect, 1.f/window_scale_factor));
-
- bool draw_succeeded = iosurface_->DrawIOSurface(
- context_, window_rect, window_scale_factor);
-