From 514b006df240441efc50be7c42680e423a80402d Mon Sep 17 00:00:00 2001 From: Alexandre Julliard Date: Tue, 20 Sep 2011 15:27:36 +0200 Subject: [PATCH] gdi32: Force colors to black and white for 1-bpp source in AlphaBlend. --- dlls/gdi32/bitblt.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/dlls/gdi32/bitblt.c b/dlls/gdi32/bitblt.c index 98ced520521..294901d2973 100644 --- a/dlls/gdi32/bitblt.c +++ b/dlls/gdi32/bitblt.c @@ -293,6 +293,20 @@ BOOL nulldrv_AlphaBlend( PHYSDEV dst_dev, struct bitblt_coords *dst, err = dst_dev->funcs->pBlendImage( dst_dev, dst_info, &bits, src, dst, func ); if (err == ERROR_BAD_FORMAT) { + /* 1-bpp source without a color table uses black & white */ + if (src_info->bmiHeader.biBitCount == 1 && !src_info->bmiHeader.biClrUsed) + { + src_info->bmiColors[0].rgbRed = 0; + src_info->bmiColors[0].rgbGreen = 0; + src_info->bmiColors[0].rgbBlue = 0; + src_info->bmiColors[0].rgbReserved = 0; + src_info->bmiColors[1].rgbRed = 0xff; + src_info->bmiColors[1].rgbGreen = 0xff; + src_info->bmiColors[1].rgbBlue = 0xff; + src_info->bmiColors[1].rgbReserved = 0; + src_info->bmiHeader.biClrUsed = 2; + } + err = convert_bits( src_info, src, dst_info, &bits ); if (!err) err = dst_dev->funcs->pBlendImage( dst_dev, dst_info, &bits, src, dst, func ); }