When rendering a PGS window area where the left edge is not at pixel 0, the chroma was being rendered in the wrong place since commit 4dc648d3430b67592cf1413ccef415f70889d71e
When rendering a PGS window area where the left edge is not at pixel 0, the chroma was being rendered in the wrong place since commit 4dc648d3430b67592cf1413ccef415f70889d71e