?? tif_getimage.c
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*cp++ = PACK(r, g, b); pp += 3; } cp += toskew; pp += fromskew; }}/* * YCbCr -> RGB conversion and packing routines. */#define YCbCrtoRGB(dst, Y) { \ uint32 r, g, b; \ TIFFYCbCrtoRGB(img->ycbcr, (Y), Cb, Cr, &r, &g, &b); \ dst = PACK(r, g, b); \}/* * 8-bit packed YCbCr samples => RGB * This function is generic for different sampling sizes, * and can handle blocks sizes that aren't multiples of the * sampling size. However, it is substantially less optimized * than the specific sampling cases. It is used as a fallback * for difficult blocks. */#ifdef notdefstatic void putcontig8bitYCbCrGenericTile( TIFFRGBAImage* img, uint32* cp, uint32 x, uint32 y, uint32 w, uint32 h, int32 fromskew, int32 toskew, unsigned char* pp, int h_group, int v_group ){ uint32* cp1 = cp+w+toskew; uint32* cp2 = cp1+w+toskew; uint32* cp3 = cp2+w+toskew; int32 incr = 3*w+4*toskew; int32 Cb, Cr; int group_size = v_group * h_group + 2; (void) y; fromskew = (fromskew * group_size) / h_group; for( yy = 0; yy < h; yy++ ) { unsigned char *pp_line; int y_line_group = yy / v_group; int y_remainder = yy - y_line_group * v_group; pp_line = pp + v_line_group * for( xx = 0; xx < w; xx++ ) { Cb = pp } } for (; h >= 4; h -= 4) { x = w>>2; do { Cb = pp[16]; Cr = pp[17]; YCbCrtoRGB(cp [0], pp[ 0]); YCbCrtoRGB(cp [1], pp[ 1]); YCbCrtoRGB(cp [2], pp[ 2]); YCbCrtoRGB(cp [3], pp[ 3]); YCbCrtoRGB(cp1[0], pp[ 4]); YCbCrtoRGB(cp1[1], pp[ 5]); YCbCrtoRGB(cp1[2], pp[ 6]); YCbCrtoRGB(cp1[3], pp[ 7]); YCbCrtoRGB(cp2[0], pp[ 8]); YCbCrtoRGB(cp2[1], pp[ 9]); YCbCrtoRGB(cp2[2], pp[10]); YCbCrtoRGB(cp2[3], pp[11]); YCbCrtoRGB(cp3[0], pp[12]); YCbCrtoRGB(cp3[1], pp[13]); YCbCrtoRGB(cp3[2], pp[14]); YCbCrtoRGB(cp3[3], pp[15]); cp += 4, cp1 += 4, cp2 += 4, cp3 += 4; pp += 18; } while (--x); cp += incr, cp1 += incr, cp2 += incr, cp3 += incr; pp += fromskew; }}#endif/* * 8-bit packed YCbCr samples w/ 4,4 subsampling => RGB */DECLAREContigPutFunc(putcontig8bitYCbCr44tile){ uint32* cp1 = cp+w+toskew; uint32* cp2 = cp1+w+toskew; uint32* cp3 = cp2+w+toskew; int32 incr = 3*w+4*toskew; (void) y; /* adjust fromskew */ fromskew = (fromskew * 18) / 4; if ((h & 3) == 0 && (w & 3) == 0) { for (; h >= 4; h -= 4) { x = w>>2; do { int32 Cb = pp[16]; int32 Cr = pp[17]; YCbCrtoRGB(cp [0], pp[ 0]); YCbCrtoRGB(cp [1], pp[ 1]); YCbCrtoRGB(cp [2], pp[ 2]); YCbCrtoRGB(cp [3], pp[ 3]); YCbCrtoRGB(cp1[0], pp[ 4]); YCbCrtoRGB(cp1[1], pp[ 5]); YCbCrtoRGB(cp1[2], pp[ 6]); YCbCrtoRGB(cp1[3], pp[ 7]); YCbCrtoRGB(cp2[0], pp[ 8]); YCbCrtoRGB(cp2[1], pp[ 9]); YCbCrtoRGB(cp2[2], pp[10]); YCbCrtoRGB(cp2[3], pp[11]); YCbCrtoRGB(cp3[0], pp[12]); YCbCrtoRGB(cp3[1], pp[13]); YCbCrtoRGB(cp3[2], pp[14]); YCbCrtoRGB(cp3[3], pp[15]); cp += 4, cp1 += 4, cp2 += 4, cp3 += 4; pp += 18; } while (--x); cp += incr, cp1 += incr, cp2 += incr, cp3 += incr; pp += fromskew; } } else { while (h > 0) { for (x = w; x > 0;) { int32 Cb = pp[16]; int32 Cr = pp[17]; switch (x) { default: switch (h) { default: YCbCrtoRGB(cp3[3], pp[15]); /* FALLTHROUGH */ case 3: YCbCrtoRGB(cp2[3], pp[11]); /* FALLTHROUGH */ case 2: YCbCrtoRGB(cp1[3], pp[ 7]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [3], pp[ 3]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 3: switch (h) { default: YCbCrtoRGB(cp3[2], pp[14]); /* FALLTHROUGH */ case 3: YCbCrtoRGB(cp2[2], pp[10]); /* FALLTHROUGH */ case 2: YCbCrtoRGB(cp1[2], pp[ 6]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [2], pp[ 2]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 2: switch (h) { default: YCbCrtoRGB(cp3[1], pp[13]); /* FALLTHROUGH */ case 3: YCbCrtoRGB(cp2[1], pp[ 9]); /* FALLTHROUGH */ case 2: YCbCrtoRGB(cp1[1], pp[ 5]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [1], pp[ 1]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 1: switch (h) { default: YCbCrtoRGB(cp3[0], pp[12]); /* FALLTHROUGH */ case 3: YCbCrtoRGB(cp2[0], pp[ 8]); /* FALLTHROUGH */ case 2: YCbCrtoRGB(cp1[0], pp[ 4]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [0], pp[ 0]); /* FALLTHROUGH */ } /* FALLTHROUGH */ } if (x < 4) { cp += x; cp1 += x; cp2 += x; cp3 += x; x = 0; } else { cp += 4; cp1 += 4; cp2 += 4; cp3 += 4; x -= 4; } pp += 18; } if (h <= 4) break; h -= 4; cp += incr, cp1 += incr, cp2 += incr, cp3 += incr; pp += fromskew; } }}/* * 8-bit packed YCbCr samples w/ 4,2 subsampling => RGB */DECLAREContigPutFunc(putcontig8bitYCbCr42tile){ uint32* cp1 = cp+w+toskew; int32 incr = 2*toskew+w; (void) y; fromskew = (fromskew * 10) / 4; if ((h & 3) == 0 && (w & 1) == 0) { for (; h >= 2; h -= 2) { x = w>>2; do { int32 Cb = pp[8]; int32 Cr = pp[9]; YCbCrtoRGB(cp [0], pp[0]); YCbCrtoRGB(cp [1], pp[1]); YCbCrtoRGB(cp [2], pp[2]); YCbCrtoRGB(cp [3], pp[3]); YCbCrtoRGB(cp1[0], pp[4]); YCbCrtoRGB(cp1[1], pp[5]); YCbCrtoRGB(cp1[2], pp[6]); YCbCrtoRGB(cp1[3], pp[7]); cp += 4, cp1 += 4; pp += 10; } while (--x); cp += incr, cp1 += incr; pp += fromskew; } } else { while (h > 0) { for (x = w; x > 0;) { int32 Cb = pp[8]; int32 Cr = pp[9]; switch (x) { default: switch (h) { default: YCbCrtoRGB(cp1[3], pp[ 7]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [3], pp[ 3]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 3: switch (h) { default: YCbCrtoRGB(cp1[2], pp[ 6]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [2], pp[ 2]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 2: switch (h) { default: YCbCrtoRGB(cp1[1], pp[ 5]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [1], pp[ 1]); /* FALLTHROUGH */ } /* FALLTHROUGH */ case 1: switch (h) { default: YCbCrtoRGB(cp1[0], pp[ 4]); /* FALLTHROUGH */ case 1: YCbCrtoRGB(cp [0], pp[ 0]); /* FALLTHROUGH */ } /* FALLTHROUGH */ } if (x < 4) { cp += x; cp1 += x; x = 0; } else { cp += 4; cp1 += 4; x -= 4; } pp += 10; } if (h <= 2) break; h -= 2; cp += incr, cp1 += incr; pp += fromskew; } }}/* * 8-bit packed YCbCr samples w/ 4,1 subsampling => RGB */DECLAREContigPutFunc(putcontig8bitYCbCr41tile){ (void) y; /* XXX adjust fromskew */ do { x = w>>2; do { int32 Cb = pp[4]; int32 Cr = pp[5]; YCbCrtoRGB(cp [0], pp[0]); YCbCrtoRGB(cp [1], pp[1]); YCbCrtoRGB(cp [2], pp[2]); YCbCrtoRGB(cp [3], pp[3]); cp += 4; pp += 6; } while (--x); if( (w&3) != 0 ) { int32 Cb = pp[4]; int32 Cr = pp[5]; switch( (w&3) ) { case 3: YCbCrtoRGB(cp [2], pp[2]); case 2: YCbCrtoRGB(cp [1], pp[1]); case 1: YCbCrtoRGB(cp [0], pp[0]); case 0: break; } cp += (w&3); pp += 6; } cp += toskew; pp += fromskew; } while (--h);}/* * 8-bit packed YCbCr samples w/ 2,2 subsampling => RGB */DECLAREContigPutFunc(putcontig8bitYCbCr22tile){ uint32* cp2; (void) y; fromskew = (fromskew / 2) * 6; cp2 = cp+w+toskew; while (h>=2) { x = w; while (x>=2) { uint32 Cb = pp[4]; uint32 Cr = pp[5]; YCbCrtoRGB(cp[0], pp[0]); YCbCrtoRGB(cp[1], pp[1]); YCbCrtoRGB(cp2[0], pp[2]); YCbCrtoRGB(cp2[1], pp[3]); cp += 2; cp2 += 2; pp += 6; x -= 2; } if (x==1) { uint32 Cb = pp[4]; uint32 Cr = pp[5]; YCbCrtoRGB(cp[0], pp[0]); YCbCrtoRGB(cp2[0], pp[2]); cp ++ ; cp2 ++ ; pp += 6; } cp += toskew*2+w; cp2 += toskew*2+w; pp += fromskew; h-=2; } if (h==1) { x = w; while (x>=2) { uint32 Cb = pp[4]; uint32 Cr = pp[5]; YCbCrtoRGB(cp[0], pp[0]); YCbCrtoRGB(cp[1], pp[1]); cp += 2; cp2 += 2; pp += 6; x -= 2; } if (x==1) { uint32 Cb = pp[4]; uint32 Cr = pp[5]; YCbCrtoRGB(cp[0], pp[0]); } }}/* * 8-bit packed YCbCr samples w/ 2,1 subsampling => RGB */DECLAREContigPutFunc(putcontig8bitYCbCr21tile){ (void) y; fromskew = (fromskew * 4) / 2; do { x = w>>1; do { int32 Cb = pp[2]; int32 Cr = pp[3]; YCbCrtoRGB(cp[0], pp[0]); YCbCrtoRGB(cp[1], pp[1]); cp += 2; pp += 4; } while (--x); if( (w&1) != 0 ) { int32 Cb = pp[2]; int32 Cr = pp[3]; YCbCrtoRGB(cp[0], pp[0]); cp += 1; pp += 4; } cp += toskew; pp += fromskew; } while (--h);}/* * 8-bit packed YCbCr samples w/ 1,2 subsampling => RGB */DECLAREContigPutFunc(putcontig8bitYCbCr12tile){ uint32* cp2; (void) y; fromskew = (fromskew / 2) * 4; cp2 = cp+w+toskew; while (h>=2) { x = w; do { uint32 Cb = pp[2]; uint32 Cr = pp[3]; YCbCrtoRGB(cp[0], pp[0]); YCbCrtoRGB(cp2[0], pp[1]); cp ++; cp2 ++; pp += 4; } while (--x); cp += toskew*2+w; cp2 += toskew*2+w; pp += fromskew; h-=2; } if (h==1) { x = w; do { uint32 Cb = pp[2]; uint32 Cr = pp[3]; YCbCrtoRGB(cp[0], pp[0]); cp ++; pp += 4; } while (--x); }}/* * 8-bit packed YCbCr samples w/ no subsampling => RGB */DECLAREContigPutFunc(putcontig8bitYCbCr11tile){ (void) y; fromskew *= 3; do { x = w; /* was x = w>>1; patched 2000/09/25 warmerda@home.com */ do { int32 Cb = pp[1]; int32 Cr = pp[2]; YCbCrtoRGB(*cp++, pp[0]); pp += 3; } while (--x); cp += toskew; pp += fromskew; } while (--h);}/* * 8-bit packed YCbCr samples w/ no subsampling => RGB */DECLARESepPutFunc(putseparate8bitYCbCr11tile){ (void) y; (void) a; /* TODO: naming of input vars is still off, change obfuscating declaration inside define, or resolve obfuscation */ while (h-- > 0) { x = w; do { uint32 dr, dg, db; TIFFYCbCrtoRGB(img->ycbcr,*r++,*g++,*b++,&dr,&dg,&db); *cp++ = PACK(dr,dg,db); } while (--x); SKEW(r, g, b, fromskew); cp += toskew; }}#undef YCbCrtoRGBstatic intinitYCbCrConversion(TIFFRGBAImage* img){ static char module[] = "initYCbCrConversion"; float *luma, *refBlackWhite; if (img->ycbcr == NULL) { img->ycbcr = (TIFFYCbCrToRGB*) _TIFFmalloc( TIFFroundup(sizeof (TIFFYCbCrToRGB), sizeof (long)) + 4*256*sizeof (TIFFRGBValue) + 2*256*sizeof (int) + 3*256*sizeof (int32) ); if (img->ycbcr == NULL) { TIFFErrorExt(img->tif->tif_clientdata, module, "No space for YCbCr->RGB conversion state"); return (0); } } TIFFGetFieldDefaulted(img->tif, TIFFTAG_YCBCRCOEFFICIENTS, &luma); TIFFGetFieldDefaulted(img->tif, TIFFTAG_REFERENCEBLACKWHITE, &refBlackWhite); if (TIFFYCbCrToRGBInit(img->ycbcr, luma, refBlackWhite) < 0) return(0); return (1);}static tileContigRoutineinitCIELabConversion(TIFFRGBAImage* img){?? 快捷鍵說明
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