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Add support for x4a4 format (depth 4 at 8bpp). Bug #6325.

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This commit is contained in:
Keith Packard
2006-04-19 21:56:13 +00:00
parent c947d796aa
commit b37c515320
4 changed files with 48 additions and 4 deletions
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27
fb/fbcompose.c
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@@ -1,5 +1,5 @@
/*
* $XdotOrg: xserver/xorg/fb/fbcompose.c,v 1.26 2005/12/09 18:35:20 ajax Exp $
* $XdotOrg: xserver/xorg/fb/fbcompose.c,v 1.27 2006-02-10 22:00:21 anholt Exp $
* $XFree86: xc/programs/Xserver/fb/fbcompose.c,v 1.17tsi Exp $
*
* Copyright © 2000 Keith Packard, member of The XFree86 Project, Inc.
@@ -385,6 +385,17 @@ fbFetch_c8 (const FbBits *bits, int x, int width, CARD32 *buffer, miIndexedPtr i
}
}
static FASTCALL void
fbFetch_x4a4 (const FbBits *bits, int x, int width, CARD32 *buffer, miIndexedPtr indexed)
{
const CARD8 *pixel = (const CARD8 *)bits + x;
const CARD8 *end = pixel + width;
while (pixel < end) {
CARD8 p = (*pixel++) & 0xf;
*buffer++ = (p | (p << 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)
@@ -548,7 +559,8 @@ static fetchProc fetchProcForPicture (PicturePtr pict)
case PICT_a2b2g2r2: return fbFetch_a2b2g2r2;
case PICT_c8: return fbFetch_c8;
case PICT_g8: return fbFetch_c8;
case PICT_x4a4: return fbFetch_x4a4;
/* 4bpp formats */
case PICT_a4: return fbFetch_a4;
case PICT_r1g2b1: return fbFetch_r1g2b1;
@@ -1261,6 +1273,16 @@ fbStore_c8 (FbBits *bits, const CARD32 *values, int x, int width, miIndexedPtr i
}
}
static FASTCALL void
fbStore_x4a4 (FbBits *bits, const CARD32 *values, int x, int width, miIndexedPtr indexed)
{
int i;
CARD8 *pixel = ((CARD8 *) bits) + x;
for (i = 0; i < width; ++i) {
*pixel++ = values[i] >> 28;
}
}
#define Store8(l,o,v) (((CARD8 *) l)[(o) >> 3] = (v))
#if IMAGE_BYTE_ORDER == MSBFirst
#define Store4(l,o,v) Store8(l,o,((o) & 4 ? \
@@ -1412,6 +1434,7 @@ static storeProc storeProcForPicture (PicturePtr pict)
case PICT_a2r2g2b2: return fbStore_a2r2g2b2;
case PICT_c8: return fbStore_c8;
case PICT_g8: return fbStore_c8;
case PICT_x4a4: return fbStore_x4a4;
/* 4bpp formats */
case PICT_a4: return fbStore_a4;