Fix #4101: Rfx decode tile width.

diff --git a/libfreerdp/codec/rfx.c b/libfreerdp/codec/rfx.c
index ce03a74..39b9782 100644 (file)
--- a/libfreerdp/codec/rfx.c
+++ b/libfreerdp/codec/rfx.c
@@ -1150,7 +1150,7 @@ BOOL rfx_process_message(RFX_CONTEXT* context, const BYTE* data, UINT32 length,
                REGION16 clippingRects;
                const RECTANGLE_16* updateRects;
                const DWORD formatSize = GetBytesPerPixel(context->pixel_format);
-               const UINT32 dstWidth = dstStride / formatSize;
+               const UINT32 dstWidth = dstStride / GetBytesPerPixel(dstFormat);
                region16_init(&clippingRects);
 
                for (i = 0; i < message->numRects; i++)