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Martin Felis
93 lines
1.6 KiB
C
93 lines
1.6 KiB
C
//-----------------------------------------------------------------------------
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//
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// ImageLib Sources
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// Copyright (C) 2000-2002 by Denton Woods
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// Last modified: 05/25/2001 <--Y2K Compliant! =]
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//
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// Filename: src-IL/include/il_rle.h
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//
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// Description: Functions for run-length encoding
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//
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//-----------------------------------------------------------------------------
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#ifndef RLE_H
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#define RLE_H
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#include "il_internal.h"
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#define TGA_MAX_RUN 128
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#define SGI_MAX_RUN 127
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#define BMP_MAX_RUN 127
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#ifdef IL_RLE_C
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#undef NOINLINE
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#undef INLINE
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#define INLINE
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#endif
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#ifndef NOINLINE
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INLINE ILuint GetPix(ILubyte *p, ILuint bpp) {
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ILuint Pixel;
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Pixel = (ILuint)*p++;
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while( bpp-- > 1 ) {
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Pixel <<= 8;
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Pixel |= (ILuint)*p++;
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}
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return Pixel;
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}
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INLINE ILint CountDiffPixels(ILubyte *p, ILuint bpp, ILuint pixCnt) {
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ILuint pixel;
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ILuint nextPixel = 0;
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ILint n;
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n = 0;
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if (pixCnt == 1)
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return pixCnt;
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pixel = GetPix(p, bpp);
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while (pixCnt > 1) {
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p += bpp;
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nextPixel = GetPix(p, bpp);
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if (nextPixel == pixel)
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break;
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pixel = nextPixel;
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++n;
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--pixCnt;
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}
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if (nextPixel == pixel)
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return n;
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return n + 1;
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}
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INLINE ILint CountSamePixels(ILubyte *p, ILuint bpp, ILuint pixCnt) {
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ILuint pixel;
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ILuint nextPixel;
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ILint n;
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n = 1;
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pixel = GetPix(p, bpp);
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pixCnt--;
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while (pixCnt > 0) {
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p += bpp;
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nextPixel = GetPix(p, bpp);
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if (nextPixel != pixel)
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break;
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++n;
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--pixCnt;
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}
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return n;
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}
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#endif
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ILuint GetPix(ILubyte *p, ILuint bpp);
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ILint CountDiffPixels(ILubyte *p, ILuint bpp, ILuint pixCnt);
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ILint CountSamePixels(ILubyte *p, ILuint bpp, ILuint pixCnt);
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#endif//RLE_H
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