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Fix crash when using PICT_x4a4 by supplying an appropriate fbFetchPixel_x4a4.

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(cherry picked from 569c808a23 commit)
This commit is contained in:
Eric Anholt 2006-06-19 16:42:09 -07:00
parent b4a0cabc98
commit 8348131abb
1 changed files with 9 additions and 0 deletions
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9
fb/fbcompose.c
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@ -849,6 +849,14 @@ fbFetchPixel_c8 (const FbBits *bits, int offset, miIndexedPtr indexed)
return indexed->rgba[pixel];
}
static FASTCALL CARD32
fbFetchPixel_x4a4 (const FbBits *bits, int offset, miIndexedPtr indexed)
{
CARD32 pixel = ((CARD8 *) bits)[offset];
return ((pixel & 0xf) | ((pixel & 0xf) << 4)) << 24;
}
#define Fetch8(l,o) (((CARD8 *) (l))[(o) >> 2])
#if IMAGE_BYTE_ORDER == MSBFirst
#define Fetch4(l,o) ((o) & 2 ? Fetch8(l,o) & 0xf : Fetch8(l,o) >> 4)
@ -988,6 +996,7 @@ static fetchPixelProc fetchPixelProcForPicture (PicturePtr pict)
case PICT_a2b2g2r2: return fbFetchPixel_a2b2g2r2;
case PICT_c8: return fbFetchPixel_c8;
case PICT_g8: return fbFetchPixel_c8;
case PICT_x4a4: return fbFetchPixel_x4a4;
/* 4bpp formats */
case PICT_a4: return fbFetchPixel_a4;