2996a6c06b
Add support for debug markers via D3DPERF API and KHR_debug. This makes it easier to understand RenderDoc captures. D3DPERF is preferred to ID3DUserDefinedAnnotation because it supports colors. d3d9.lib is now linked in to support this. This feature is disabled by default, and is controlled by GS_USE_DEBUG_MARKERS. From: obsproject/obs-studio#1799