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