3.3.5.4 Processing an RDPGFX_SOLIDFILL_PDU message
The structure and fields of the RDPGFX_SOLIDFILL_PDU message are specified in section 2.2.2.4. The header field MUST be processed as specified in section 3.1.5.1. The surfaceId field MUST identify a valid offscreen surface in the Offscreen Surface (section 3.3.1.6) ADM element. Once the RDPGFX_SOLIDFILL_PDU message has been successfully decoded, the rectangles specified in the fillRects field MUST be filled with the 32-bpp color specified by the fillPixel field using an R2_COPYPEN ROP2 operation ([MS-RDPEGDI] section 2.2.2.2.1.1.1.6).