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/*
* $Id$
*
* Copyright © 2004 Keith Packard
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of Keith Packard not be used in
* advertising or publicity pertaining to distribution of the software without
* specific, written prior permission. Keith Packard makes no
* representations about the suitability of this software for any purpose. It
* is provided "as is" without express or implied warranty.
*
* KEITH PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL KEITH PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
* PERFORMANCE OF THIS SOFTWARE.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "fb.h"
#ifdef RENDER
#include "picturestr.h"
#include "mipict.h"
#include "renderedge.h"
#include "fbpict.h"
/*
* 8 bit alpha
*/
#define N_BITS 8
#define rasterizeEdges fbRasterizeEdges8
#define DefineAlpha(line,x) \
CARD8 *__ap = (CARD8 *) line + (x)
#define StepAlpha __ap++
#define AddAlpha(a) { \
CARD16 __a = a + *__ap; \
*__ap = ((CARD8) ((__a) | (0 - ((__a) >> 8)))); \
}
#include "fbedgeimp.h"
#undef AddAlpha
#undef StepAlpha
#undef DefineAlpha
#undef rasterizeEdges
#undef N_BITS
/*
* 4 bit alpha
*/
#define N_BITS 4
#define rasterizeEdges fbRasterizeEdges4
#if BITMAP_BIT_ORDER == LSBFirst
#define Shift4(o) ((o) << 2)
#else
#define Shift4(o) ((1-(o)) << 2)
#endif
#define Get4(x,o) (((x) >> Shift4(o)) & 0xf)
#define Put4(x,o,v) (((x) & ~(0xf << Shift4(o))) | (((v) & 0xf) << Shift4(o)))
#define DefineAlpha(line,x) \
CARD8 *__ap = (CARD8 *) line + ((x) >> 1); \
int __ao = (x) & 1
#define StepAlpha ((__ap += __ao), (__ao ^= 1))
#define AddAlpha(a) { \
CARD8 __o = *__ap; \
CARD8 __a = (a) + Get4(__o, __ao); \
*__ap = Put4 (__o, __ao, __a | (0 - ((__a) >> 4))); \
}
#include "fbedgeimp.h"
#undef AddAlpha
#undef StepAlpha
#undef DefineAlpha
#undef rasterizeEdges
#undef N_BITS
/*
* 1 bit alpha
*/
#define N_BITS 1
#define rasterizeEdges fbRasterizeEdges1
#include "fbedgeimp.h"
#undef rasterizeEdges
#undef N_BITS
void
fbRasterizeEdges (FbBits *buf,
int bpp,
int width,
int stride,
RenderEdge *l,
RenderEdge *r,
xFixed t,
xFixed b)
{
switch (bpp) {
case 1:
fbRasterizeEdges1 (buf, width, stride, l, r, t, b);
break;
case 4:
fbRasterizeEdges4 (buf, width, stride, l, r, t, b);
break;
case 8:
fbRasterizeEdges8 (buf, width, stride, l, r, t, b);
break;
}
}
#endif /* RENDER */
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