/* $Id$ */ /* * Copyright (c) 1988-1997 Sam Leffler * Copyright (c) 1991-1997 Silicon Graphics, Inc. * * Permission to use, copy, modify, distribute, and sell this software and * its documentation for any purpose is hereby granted without fee, provided * that (i) the above copyright notices and this permission notice appear in * all copies of the software and related documentation, and (ii) the names of * Sam Leffler and Silicon Graphics may not be used in any advertising or * publicity relating to the software without the specific, prior written * permission of Sam Leffler and Silicon Graphics. * * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND, * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. * * IN NO EVENT SHALL SAM LEFFLER OR SILICON GRAPHICS BE LIABLE FOR * ANY SPECIAL, INCIDENTAL, INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, * OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, * WHETHER OR NOT ADVISED OF THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF * LIABILITY, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. */ /* * Modified for use as Evince TIFF ps exporter by * Matthew S. Wilson * Modifications Copyright (C) 2005 rpath, Inc. * * FIXME: refactor to remove use of global variables */ #include #include /* for atof */ #include #include #include #include #include "tiff2ps.h" /* * Revision history * * 2001-Mar-21 * I (Bruce A. Mallett) added this revision history comment ;) * * Fixed PS_Lvl2page() code which outputs non-ASCII85 raw * data. Moved test for when to output a line break to * *after* the output of a character. This just serves * to fix an eye-nuisance where the first line of raw * data was one character shorter than subsequent lines. * * Added an experimental ASCII85 encoder which can be used * only when there is a single buffer of bytes to be encoded. * This version is much faster at encoding a straight-line * buffer of data because it can avoid alot of the loop * overhead of the byte-by-bye version. To use this version * you need to define EXP_ASCII85ENCODER (experimental ...). * * Added bug fix given by Michael Schmidt to PS_Lvl2page() * in which an end-of-data marker ('>') was not being output * when producing non-ASCII85 encoded PostScript Level 2 * data. * * Fixed PS_Lvl2colorspace() so that it no longer assumes that * a TIFF having more than 2 planes is a CMYK. This routine * no longer looks at the samples per pixel but instead looks * at the "photometric" value. This change allows support of * CMYK TIFFs. * * Modified the PostScript L2 imaging loop so as to test if * the input stream is still open before attempting to do a * flushfile on it. This was done because some RIPs close * the stream after doing the image operation. * * Got rid of the realloc() being done inside a loop in the * PSRawDataBW() routine. The code now walks through the * byte-size array outside the loop to determine the largest * size memory block that will be needed. * * Added "-m" switch to ask tiff2ps to, where possible, use the * "imagemask" operator instead of the "image" operator. * * Added the "-i #" switch to allow interpolation to be disabled. * * Unrolled a loop or two to improve performance. */ /* * Define EXP_ASCII85ENCODER if you want to use an experimental * version of the ASCII85 encoding routine. The advantage of * using this routine is that tiff2ps will convert to ASCII85 * encoding at between 3 and 4 times the speed as compared to * using the old (non-experimental) encoder. The disadvantage * is that you will be using a new (and unproven) encoding * routine. So user beware, you have been warned! */ #define EXP_ASCII85ENCODER /* * NB: this code assumes uint32 works with printf's %l[ud]. */ #ifndef TRUE #define TRUE 1 #define FALSE 0 #endif static int ascii85 = FALSE; /* use ASCII85 encoding */ static int interpolate = TRUE; /* interpolate level2 image */ static int level2 = FALSE; /* generate PostScript level 2 */ static int level3 = FALSE; /* generate PostScript level 3 */ static int printAll = FALSE; /* print all images in file */ static int generateEPSF = FALSE; /* generate Encapsulated PostScript */ static int PSduplex = FALSE; /* enable duplex printing */ static int PStumble = FALSE; /* enable top edge binding */ static int PSavoiddeadzone = TRUE; /* enable avoiding printer deadzone */ static double maxPageHeight = 0; /* maximum size to fit on page */ static double splitOverlap = 0; /* amount for split pages to overlag */ static int rotate = FALSE; /* rotate image by 180 degrees */ static char *filename = NULL; /* input filename */ static int useImagemask = FALSE; /* Use imagemask instead of image operator */ static uint16 res_unit = 0; /* Resolution units: 2 - inches, 3 - cm */ /* * ASCII85 Encoding Support. */ static unsigned char ascii85buf[10]; static int ascii85count; static int ascii85breaklen; static void PSpage(FILE*, TIFF*, uint32, uint32); static void PSColorContigPreamble(FILE*, uint32, uint32, int); static void PSColorSeparatePreamble(FILE*, uint32, uint32, int); static void PSDataColorContig(FILE*, TIFF*, uint32, uint32, int); static void PSDataColorSeparate(FILE*, TIFF*, uint32, uint32, int); static void PSDataPalette(FILE*, TIFF*, uint32, uint32); static void PSDataBW(FILE*, TIFF*, uint32, uint32); static void Ascii85Init(void); static void Ascii85Put(unsigned char code, FILE* fd); static void Ascii85Flush(FILE* fd); static void PSHead(FILE*, TIFF*, uint32, uint32, double, double, double, double); #if defined( EXP_ASCII85ENCODER) static int Ascii85EncodeBlock( uint8 * ascii85_p, unsigned f_eod, const uint8 * raw_p, int raw_l ); #endif static uint16 samplesperpixel; static uint16 bitspersample; static uint16 planarconfiguration; static uint16 photometric; static uint16 compression; static uint16 extrasamples; static int alpha; static int checkImage(TIFF* tif) { switch (photometric) { case PHOTOMETRIC_YCBCR: if ((compression == COMPRESSION_JPEG || compression == COMPRESSION_OJPEG) && planarconfiguration == PLANARCONFIG_CONTIG) { /* can rely on libjpeg to convert to RGB */ TIFFSetField(tif, TIFFTAG_JPEGCOLORMODE, JPEGCOLORMODE_RGB); photometric = PHOTOMETRIC_RGB; } else { if (level2 || level3) break; TIFFError(filename, "Can not handle image with %s", "PhotometricInterpretation=YCbCr"); return (0); } /* fall thru... */ case PHOTOMETRIC_RGB: if (alpha && bitspersample != 8) { TIFFError(filename, "Can not handle %d-bit/sample RGB image with alpha", bitspersample); return (0); } /* fall thru... */ case PHOTOMETRIC_SEPARATED: case PHOTOMETRIC_PALETTE: case PHOTOMETRIC_MINISBLACK: case PHOTOMETRIC_MINISWHITE: break; case PHOTOMETRIC_LOGL: case PHOTOMETRIC_LOGLUV: if (compression != COMPRESSION_SGILOG && compression != COMPRESSION_SGILOG24) { TIFFError(filename, "Can not handle %s data with compression other than SGILog", (photometric == PHOTOMETRIC_LOGL) ? "LogL" : "LogLuv" ); return (0); } /* rely on library to convert to RGB/greyscale */ TIFFSetField(tif, TIFFTAG_SGILOGDATAFMT, SGILOGDATAFMT_8BIT); photometric = (photometric == PHOTOMETRIC_LOGL) ? PHOTOMETRIC_MINISBLACK : PHOTOMETRIC_RGB; bitspersample = 8; break; case PHOTOMETRIC_CIELAB: /* fall thru... */ default: TIFFError(filename, "Can not handle image with PhotometricInterpretation=%d", photometric); return (0); } switch (bitspersample) { case 1: case 2: case 4: case 8: break; default: TIFFError(filename, "Can not handle %d-bit/sample image", bitspersample); return (0); } if (planarconfiguration == PLANARCONFIG_SEPARATE && extrasamples > 0) TIFFWarning(filename, "Ignoring extra samples"); return (1); } #define PS_UNIT_SIZE 72.0F #define PSUNITS(npix,res) ((npix) * (PS_UNIT_SIZE / (res))) static char RGBcolorimage[] = "\ /bwproc {\n\ rgbproc\n\ dup length 3 idiv string 0 3 0\n\ 5 -1 roll {\n\ add 2 1 roll 1 sub dup 0 eq {\n\ pop 3 idiv\n\ 3 -1 roll\n\ dup 4 -1 roll\n\ dup 3 1 roll\n\ 5 -1 roll put\n\ 1 add 3 0\n\ } { 2 1 roll } ifelse\n\ } forall\n\ pop pop pop\n\ } def\n\ /colorimage where {pop} {\n\ /colorimage {pop pop /rgbproc exch def {bwproc} image} bind def\n\ } ifelse\n\ "; /* * Adobe Photoshop requires a comment line of the form: * * %ImageData:
* <1 for binary|2 for hex> "data start" * * It is claimed to be part of some future revision of the EPS spec. */ static void PhotoshopBanner(FILE* fd, uint32 w, uint32 h, int bs, int nc, char* startline) { fprintf(fd, "%%ImageData: %ld %ld %d %d 0 %d 2 \"", (long) w, (long) h, bitspersample, nc, bs); fprintf(fd, startline, nc); fprintf(fd, "\"\n"); } /* * pw : image width in pixels * ph : image height in pixels * pprw : image width in PS units (72 dpi) * pprh : image height in PS units (72 dpi) */ static void setupPageState(TIFF* tif, uint32* pw, uint32* ph, double* pprw, double* pprh) { float xres = 0.0F, yres = 0.0F; TIFFGetField(tif, TIFFTAG_IMAGEWIDTH, pw); TIFFGetField(tif, TIFFTAG_IMAGELENGTH, ph); if (res_unit == 0) TIFFGetFieldDefaulted(tif, TIFFTAG_RESOLUTIONUNIT, &res_unit); /* * Calculate printable area. */ if (!TIFFGetField(tif, TIFFTAG_XRESOLUTION, &xres) || fabs(xres) < 0.0000001) xres = PS_UNIT_SIZE; if (!TIFFGetField(tif, TIFFTAG_YRESOLUTION, &yres) || fabs(yres) < 0.0000001) yres = PS_UNIT_SIZE; switch (res_unit) { case RESUNIT_CENTIMETER: xres *= 2.54F, yres *= 2.54F; break; case RESUNIT_INCH: break; case RESUNIT_NONE: default: xres *= PS_UNIT_SIZE, yres *= PS_UNIT_SIZE; break; } *pprh = PSUNITS(*ph, yres); *pprw = PSUNITS(*pw, xres); } static int isCCITTCompression(TIFF* tif) { uint16 compress; TIFFGetField(tif, TIFFTAG_COMPRESSION, &compress); return (compress == COMPRESSION_CCITTFAX3 || compress == COMPRESSION_CCITTFAX4 || compress == COMPRESSION_CCITTRLE || compress == COMPRESSION_CCITTRLEW); } static tsize_t tf_bytesperrow; static tsize_t ps_bytesperrow; static tsize_t tf_rowsperstrip; static tsize_t tf_numberstrips; static char *hex = "0123456789abcdef"; /* * imagewidth & imageheight are 1/72 inches * pagewidth & pageheight are inches */ static int PlaceImage(FILE *fp, double pagewidth, double pageheight, double imagewidth, double imageheight, int splitpage, double lm, double bm, int cnt) { double xtran = 0; double ytran = 0; double xscale = 1; double yscale = 1; double left_offset = lm * PS_UNIT_SIZE; double bottom_offset = bm * PS_UNIT_SIZE; double subimageheight; double splitheight; double overlap; pagewidth *= PS_UNIT_SIZE; pageheight *= PS_UNIT_SIZE; if (maxPageHeight==0) splitheight = 0; else splitheight = maxPageHeight * PS_UNIT_SIZE; overlap = splitOverlap * PS_UNIT_SIZE; /* * WIDTH: * if too wide, scrunch to fit * else leave it alone */ if (imagewidth <= pagewidth) { xscale = imagewidth; } else { xscale = pagewidth; } /* HEIGHT: * if too long, scrunch to fit * if too short, move to top of page */ if (imageheight <= pageheight) { yscale = imageheight; ytran = pageheight - imageheight; } else if (imageheight > pageheight && (splitheight == 0 || imageheight <= splitheight)) { yscale = pageheight; } else /* imageheight > splitheight */ { subimageheight = imageheight - (pageheight-overlap)*splitpage; if (subimageheight <= pageheight) { yscale = imageheight; ytran = pageheight - subimageheight; splitpage = 0; } else if ( subimageheight > pageheight && subimageheight <= splitheight) { yscale = imageheight * pageheight / subimageheight; ytran = 0; splitpage = 0; } else /* sumimageheight > splitheight */ { yscale = imageheight; ytran = pageheight - subimageheight; splitpage++; } } bottom_offset += ytran / (cnt?2:1); if (cnt) left_offset += xtran / 2; fprintf(fp, "%f %f translate\n", left_offset, bottom_offset); fprintf(fp, "%f %f scale\n", xscale, yscale); if (rotate) fputs ("1 1 translate 180 rotate\n", fp); return splitpage; } void TIFF2PS(FILE* fd, TIFF* tif, double pw, double ph, double lm, double bm, int cnt, int *npages) { uint32 w, h; float ox, oy; double prw, prh; double scale = 1.0; double left_offset = lm * PS_UNIT_SIZE; double bottom_offset = bm * PS_UNIT_SIZE; uint32 subfiletype; uint16* sampleinfo; int split; if (!TIFFGetField(tif, TIFFTAG_XPOSITION, &ox)) ox = 0; if (!TIFFGetField(tif, TIFFTAG_YPOSITION, &oy)) oy = 0; setupPageState(tif, &w, &h, &prw, &prh); do { tf_numberstrips = TIFFNumberOfStrips(tif); TIFFGetFieldDefaulted(tif, TIFFTAG_ROWSPERSTRIP, &tf_rowsperstrip); setupPageState(tif, &w, &h, &prw, &prh); if (!*npages) PSHead(fd, tif, w, h, prw, prh, ox, oy); TIFFGetFieldDefaulted(tif, TIFFTAG_BITSPERSAMPLE, &bitspersample); TIFFGetFieldDefaulted(tif, TIFFTAG_SAMPLESPERPIXEL, &samplesperpixel); TIFFGetFieldDefaulted(tif, TIFFTAG_PLANARCONFIG, &planarconfiguration); TIFFGetField(tif, TIFFTAG_COMPRESSION, &compression); TIFFGetFieldDefaulted(tif, TIFFTAG_EXTRASAMPLES, &extrasamples, &sampleinfo); alpha = (extrasamples == 1 && sampleinfo[0] == EXTRASAMPLE_ASSOCALPHA); if (!TIFFGetField(tif, TIFFTAG_PHOTOMETRIC, &photometric)) { switch (samplesperpixel - extrasamples) { case 1: if (isCCITTCompression(tif)) photometric = PHOTOMETRIC_MINISWHITE; else photometric = PHOTOMETRIC_MINISBLACK; break; case 3: photometric = PHOTOMETRIC_RGB; break; case 4: photometric = PHOTOMETRIC_SEPARATED; break; } } if (checkImage(tif)) { tf_bytesperrow = TIFFScanlineSize(tif); *npages = *npages + 1; fprintf(fd, "%%%%Page: %d %d\n", *npages, *npages); if (!generateEPSF && ( level2 || level3 )) { double psw = 0.0, psh = 0.0; if (psw != 0.0) { psw = pw * PS_UNIT_SIZE; if (res_unit == RESUNIT_CENTIMETER) psw *= 2.54F; } else psw=rotate ? prh:prw; if (psh != 0.0) { psh = ph * PS_UNIT_SIZE; if (res_unit == RESUNIT_CENTIMETER) psh *= 2.54F; } else psh=rotate ? prw:prh; fprintf(fd, "1 dict begin /PageSize [ %f %f ] def currentdict end setpagedevice\n", psw, psh); fputs( "<<\n /Policies <<\n /PageSize 3\n >>\n>> setpagedevice\n", fd); } fprintf(fd, "gsave\n"); fprintf(fd, "100 dict begin\n"); if (pw != 0 || ph != 0) { if (!pw) pw = prw; if (!ph) ph = prh; if (maxPageHeight) { /* used -H option */ split = PlaceImage(fd,pw,ph,prw,prh, 0,lm,bm,cnt); while( split ) { PSpage(fd, tif, w, h); fprintf(fd, "end\n"); fprintf(fd, "grestore\n"); fprintf(fd, "showpage\n"); *npages = *npages + 1; fprintf(fd, "%%%%Page: %d %d\n", *npages, *npages); fprintf(fd, "gsave\n"); fprintf(fd, "100 dict begin\n"); split = PlaceImage(fd,pw,ph,prw,prh, split,lm,bm,cnt); } } else { pw *= PS_UNIT_SIZE; ph *= PS_UNIT_SIZE; /* NB: maintain image aspect ratio */ scale = pw/prw < ph/prh ? pw/prw : ph/prh; if (scale > 1.0) scale = 1.0; if (cnt) { bottom_offset += (ph - prh * scale) / 2; left_offset += (pw - prw * scale) / 2; } fprintf(fd, "%f %f translate\n", left_offset, bottom_offset); fprintf(fd, "%f %f scale\n", prw * scale, prh * scale); if (rotate) fputs ("1 1 translate 180 rotate\n", fd); } } else { fprintf(fd, "%f %f scale\n", prw, prh); if (rotate) fputs ("1 1 translate 180 rotate\n", fd); } PSpage(fd, tif, w, h); fprintf(fd, "end\n"); fprintf(fd, "grestore\n"); fprintf(fd, "showpage\n"); } if (generateEPSF) break; TIFFGetFieldDefaulted(tif, TIFFTAG_SUBFILETYPE, &subfiletype); } while (((subfiletype & FILETYPE_PAGE) || printAll) && TIFFReadDirectory(tif)); } static char DuplexPreamble[] = "\ %%BeginFeature: *Duplex True\n\ systemdict begin\n\ /languagelevel where { pop languagelevel } { 1 } ifelse\n\ 2 ge { 1 dict dup /Duplex true put setpagedevice }\n\ { statusdict /setduplex known { statusdict begin setduplex true end } if\n\ } ifelse\n\ end\n\ %%EndFeature\n\ "; static char TumblePreamble[] = "\ %%BeginFeature: *Tumble True\n\ systemdict begin\n\ /languagelevel where { pop languagelevel } { 1 } ifelse\n\ 2 ge { 1 dict dup /Tumble true put setpagedevice }\n\ { statusdict /settumble known { statusdict begin true settumble end } if\n\ } ifelse\n\ end\n\ %%EndFeature\n\ "; static char AvoidDeadZonePreamble[] = "\ gsave newpath clippath pathbbox grestore\n\ 4 2 roll 2 copy translate\n\ exch 3 1 roll sub 3 1 roll sub exch\n\ currentpagedevice /PageSize get aload pop\n\ exch 3 1 roll div 3 1 roll div abs exch abs\n\ 2 copy gt { exch } if pop\n\ dup 1 lt { dup scale } { pop } ifelse\n\ "; void PSHead(FILE *fd, TIFF *tif, uint32 w, uint32 h, double pw, double ph, double ox, double oy) { time_t t; (void) tif; (void) w; (void) h; t = time(0); fprintf(fd, "%%!PS-Adobe-3.0%s\n", generateEPSF ? " EPSF-3.0" : ""); fprintf(fd, "%%%%Creator: Evince\n"); fprintf(fd, "%%%%CreationDate: %s", ctime(&t)); fprintf(fd, "%%%%DocumentData: Clean7Bit\n"); fprintf(fd, "%%%%Origin: %ld %ld\n", (long) ox, (long) oy); /* NB: should use PageBoundingBox */ fprintf(fd, "%%%%BoundingBox: 0 0 %ld %ld\n", (long) ceil(pw), (long) ceil(ph)); fprintf(fd, "%%%%LanguageLevel: %d\n", (level3 ? 3 : (level2 ? 2 : 1))); fprintf(fd, "%%%%Pages: (atend)\n"); fprintf(fd, "%%%%EndComments\n"); fprintf(fd, "%%%%BeginSetup\n"); if (PSduplex) fprintf(fd, "%s", DuplexPreamble); if (PStumble) fprintf(fd, "%s", TumblePreamble); if (PSavoiddeadzone && (level2 || level3)) fprintf(fd, "%s", AvoidDeadZonePreamble); fprintf(fd, "%%%%EndSetup\n"); } void TIFFPSTail(FILE *fd, int npages) { fprintf(fd, "%%%%Trailer\n"); fprintf(fd, "%%%%Pages: %d\n", npages); fprintf(fd, "%%%%EOF\n"); } static int checkcmap(TIFF* tif, int n, uint16* r, uint16* g, uint16* b) { (void) tif; while (n-- > 0) if (*r++ >= 256 || *g++ >= 256 || *b++ >= 256) return (16); TIFFWarning(filename, "Assuming 8-bit colormap"); return (8); } static void PS_Lvl2colorspace(FILE* fd, TIFF* tif) { uint16 *rmap, *gmap, *bmap; int i, num_colors; const char * colorspace_p; switch ( photometric ) { case PHOTOMETRIC_SEPARATED: colorspace_p = "CMYK"; break; case PHOTOMETRIC_RGB: colorspace_p = "RGB"; break; default: colorspace_p = "Gray"; } /* * Set up PostScript Level 2 colorspace according to * section 4.8 in the PostScript refenence manual. */ fputs("% PostScript Level 2 only.\n", fd); if (photometric != PHOTOMETRIC_PALETTE) { if (photometric == PHOTOMETRIC_YCBCR) { /* MORE CODE HERE */ } fprintf(fd, "/Device%s setcolorspace\n", colorspace_p ); return; } /* * Set up an indexed/palette colorspace */ num_colors = (1 << bitspersample); if (!TIFFGetField(tif, TIFFTAG_COLORMAP, &rmap, &gmap, &bmap)) { TIFFError(filename, "Palette image w/o \"Colormap\" tag"); return; } if (checkcmap(tif, num_colors, rmap, gmap, bmap) == 16) { /* * Convert colormap to 8-bits values. */ #define CVT(x) (((x) * 255) / ((1L<<16)-1)) for (i = 0; i < num_colors; i++) { rmap[i] = CVT(rmap[i]); gmap[i] = CVT(gmap[i]); bmap[i] = CVT(bmap[i]); } #undef CVT } fprintf(fd, "[ /Indexed /DeviceRGB %d", num_colors - 1); if (ascii85) { Ascii85Init(); fputs("\n<~", fd); ascii85breaklen -= 2; } else fputs(" <", fd); for (i = 0; i < num_colors; i++) { if (ascii85) { Ascii85Put((unsigned char)rmap[i], fd); Ascii85Put((unsigned char)gmap[i], fd); Ascii85Put((unsigned char)bmap[i], fd); } else { fputs((i % 8) ? " " : "\n ", fd); fprintf(fd, "%02x%02x%02x", rmap[i], gmap[i], bmap[i]); } } if (ascii85) Ascii85Flush(fd); else fputs(">\n", fd); fputs("] setcolorspace\n", fd); } static int PS_Lvl2ImageDict(FILE* fd, TIFF* tif, uint32 w, uint32 h) { int use_rawdata; uint32 tile_width, tile_height; uint16 predictor, minsamplevalue, maxsamplevalue; int repeat_count; char im_h[64], im_x[64], im_y[64]; char * imageOp = "image"; if ( useImagemask && (bitspersample == 1) ) imageOp = "imagemask"; (void)strcpy(im_x, "0"); (void)sprintf(im_y, "%lu", (long) h); (void)sprintf(im_h, "%lu", (long) h); tile_width = w; tile_height = h; if (TIFFIsTiled(tif)) { repeat_count = TIFFNumberOfTiles(tif); TIFFGetField(tif, TIFFTAG_TILEWIDTH, &tile_width); TIFFGetField(tif, TIFFTAG_TILELENGTH, &tile_height); if (tile_width > w || tile_height > h || (w % tile_width) != 0 || (h % tile_height != 0)) { /* * The tiles does not fit image width and height. * Set up a clip rectangle for the image unit square. */ fputs("0 0 1 1 rectclip\n", fd); } if (tile_width < w) { fputs("/im_x 0 def\n", fd); (void)strcpy(im_x, "im_x neg"); } if (tile_height < h) { fputs("/im_y 0 def\n", fd); (void)sprintf(im_y, "%lu im_y sub", (unsigned long) h); } } else { repeat_count = tf_numberstrips; tile_height = tf_rowsperstrip; if (tile_height > h) tile_height = h; if (repeat_count > 1) { fputs("/im_y 0 def\n", fd); fprintf(fd, "/im_h %lu def\n", (unsigned long) tile_height); (void)strcpy(im_h, "im_h"); (void)sprintf(im_y, "%lu im_y sub", (unsigned long) h); } } /* * Output start of exec block */ fputs("{ % exec\n", fd); if (repeat_count > 1) fprintf(fd, "%d { %% repeat\n", repeat_count); /* * Output filter options and image dictionary. */ if (ascii85) fputs(" /im_stream currentfile /ASCII85Decode filter def\n", fd); fputs(" <<\n", fd); fputs(" /ImageType 1\n", fd); fprintf(fd, " /Width %lu\n", (unsigned long) tile_width); /* * Workaround for some software that may crash when last strip * of image contains fewer number of scanlines than specified * by the `/Height' variable. So for stripped images with multiple * strips we will set `/Height' as `im_h', because one is * recalculated for each strip - including the (smaller) final strip. * For tiled images and images with only one strip `/Height' will * contain number of scanlines in tile (or image height in case of * one-stripped image). */ if (TIFFIsTiled(tif) || tf_numberstrips == 1) fprintf(fd, " /Height %lu\n", (unsigned long) tile_height); else fprintf(fd, " /Height im_h\n"); if (planarconfiguration == PLANARCONFIG_SEPARATE && samplesperpixel > 1) fputs(" /MultipleDataSources true\n", fd); fprintf(fd, " /ImageMatrix [ %lu 0 0 %ld %s %s ]\n", (unsigned long) w, - (long)h, im_x, im_y); fprintf(fd, " /BitsPerComponent %d\n", bitspersample); fprintf(fd, " /Interpolate %s\n", interpolate ? "true" : "false"); switch (samplesperpixel - extrasamples) { case 1: switch (photometric) { case PHOTOMETRIC_MINISBLACK: fputs(" /Decode [0 1]\n", fd); break; case PHOTOMETRIC_MINISWHITE: switch (compression) { case COMPRESSION_CCITTRLE: case COMPRESSION_CCITTRLEW: case COMPRESSION_CCITTFAX3: case COMPRESSION_CCITTFAX4: /* * Manage inverting with /Blackis1 flag * since there migth be uncompressed parts */ fputs(" /Decode [0 1]\n", fd); break; default: /* * ERROR... */ fputs(" /Decode [1 0]\n", fd); break; } break; case PHOTOMETRIC_PALETTE: TIFFGetFieldDefaulted(tif, TIFFTAG_MINSAMPLEVALUE, &minsamplevalue); TIFFGetFieldDefaulted(tif, TIFFTAG_MAXSAMPLEVALUE, &maxsamplevalue); fprintf(fd, " /Decode [%u %u]\n", minsamplevalue, maxsamplevalue); break; default: /* * ERROR ? */ fputs(" /Decode [0 1]\n", fd); break; } break; case 3: switch (photometric) { case PHOTOMETRIC_RGB: fputs(" /Decode [0 1 0 1 0 1]\n", fd); break; case PHOTOMETRIC_MINISWHITE: case PHOTOMETRIC_MINISBLACK: default: /* * ERROR?? */ fputs(" /Decode [0 1 0 1 0 1]\n", fd); break; } break; case 4: /* * ERROR?? */ fputs(" /Decode [0 1 0 1 0 1 0 1]\n", fd); break; } fputs(" /DataSource", fd); if (planarconfiguration == PLANARCONFIG_SEPARATE && samplesperpixel > 1) fputs(" [", fd); if (ascii85) fputs(" im_stream", fd); else fputs(" currentfile /ASCIIHexDecode filter", fd); use_rawdata = TRUE; switch (compression) { case COMPRESSION_NONE: /* 1: uncompressed */ break; case COMPRESSION_CCITTRLE: /* 2: CCITT modified Huffman RLE */ case COMPRESSION_CCITTRLEW: /* 32771: #1 w/ word alignment */ case COMPRESSION_CCITTFAX3: /* 3: CCITT Group 3 fax encoding */ case COMPRESSION_CCITTFAX4: /* 4: CCITT Group 4 fax encoding */ fputs("\n\t<<\n", fd); if (compression == COMPRESSION_CCITTFAX3) { uint32 g3_options; fputs("\t /EndOfLine true\n", fd); fputs("\t /EndOfBlock false\n", fd); if (!TIFFGetField(tif, TIFFTAG_GROUP3OPTIONS, &g3_options)) g3_options = 0; if (g3_options & GROUP3OPT_2DENCODING) fprintf(fd, "\t /K %s\n", im_h); if (g3_options & GROUP3OPT_UNCOMPRESSED) fputs("\t /Uncompressed true\n", fd); if (g3_options & GROUP3OPT_FILLBITS) fputs("\t /EncodedByteAlign true\n", fd); } if (compression == COMPRESSION_CCITTFAX4) { uint32 g4_options; fputs("\t /K -1\n", fd); TIFFGetFieldDefaulted(tif, TIFFTAG_GROUP4OPTIONS, &g4_options); if (g4_options & GROUP4OPT_UNCOMPRESSED) fputs("\t /Uncompressed true\n", fd); } if (!(tile_width == w && w == 1728U)) fprintf(fd, "\t /Columns %lu\n", (unsigned long) tile_width); fprintf(fd, "\t /Rows %s\n", im_h); if (compression == COMPRESSION_CCITTRLE || compression == COMPRESSION_CCITTRLEW) { fputs("\t /EncodedByteAlign true\n", fd); fputs("\t /EndOfBlock false\n", fd); } if (photometric == PHOTOMETRIC_MINISBLACK) fputs("\t /BlackIs1 true\n", fd); fprintf(fd, "\t>> /CCITTFaxDecode filter"); break; case COMPRESSION_LZW: /* 5: Lempel-Ziv & Welch */ TIFFGetFieldDefaulted(tif, TIFFTAG_PREDICTOR, &predictor); if (predictor == 2) { fputs("\n\t<<\n", fd); fprintf(fd, "\t /Predictor %u\n", predictor); fprintf(fd, "\t /Columns %lu\n", (unsigned long) tile_width); fprintf(fd, "\t /Colors %u\n", samplesperpixel); fprintf(fd, "\t /BitsPerComponent %u\n", bitspersample); fputs("\t>>", fd); } fputs(" /LZWDecode filter", fd); break; case COMPRESSION_DEFLATE: /* 5: ZIP */ case COMPRESSION_ADOBE_DEFLATE: if ( level3 ) { TIFFGetFieldDefaulted(tif, TIFFTAG_PREDICTOR, &predictor); if (predictor > 1) { fprintf(fd, "\t %% PostScript Level 3 only."); fputs("\n\t<<\n", fd); fprintf(fd, "\t /Predictor %u\n", predictor); fprintf(fd, "\t /Columns %lu\n", (unsigned long) tile_width); fprintf(fd, "\t /Colors %u\n", samplesperpixel); fprintf(fd, "\t /BitsPerComponent %u\n", bitspersample); fputs("\t>>", fd); } fputs(" /FlateDecode filter", fd); } else { use_rawdata = FALSE ; } break; case COMPRESSION_PACKBITS: /* 32773: Macintosh RLE */ fputs(" /RunLengthDecode filter", fd); use_rawdata = TRUE; break; case COMPRESSION_OJPEG: /* 6: !6.0 JPEG */ case COMPRESSION_JPEG: /* 7: %JPEG DCT compression */ #ifdef notdef /* * Code not tested yet */ fputs(" /DCTDecode filter", fd); use_rawdata = TRUE; #else use_rawdata = FALSE; #endif break; case COMPRESSION_NEXT: /* 32766: NeXT 2-bit RLE */ case COMPRESSION_THUNDERSCAN: /* 32809: ThunderScan RLE */ case COMPRESSION_PIXARFILM: /* 32908: Pixar companded 10bit LZW */ case COMPRESSION_JBIG: /* 34661: ISO JBIG */ use_rawdata = FALSE; break; case COMPRESSION_SGILOG: /* 34676: SGI LogL or LogLuv */ case COMPRESSION_SGILOG24: /* 34677: SGI 24-bit LogLuv */ use_rawdata = FALSE; break; default: /* * ERROR... */ use_rawdata = FALSE; break; } if (planarconfiguration == PLANARCONFIG_SEPARATE && samplesperpixel > 1) { uint16 i; /* * NOTE: This code does not work yet... */ for (i = 1; i < samplesperpixel; i++) fputs(" dup", fd); fputs(" ]", fd); } fprintf( fd, "\n >> %s\n", imageOp ); if (ascii85) fputs(" im_stream status { im_stream flushfile } if\n", fd); if (repeat_count > 1) { if (tile_width < w) { fprintf(fd, " /im_x im_x %lu add def\n", (unsigned long) tile_width); if (tile_height < h) { fprintf(fd, " im_x %lu ge {\n", (unsigned long) w); fputs(" /im_x 0 def\n", fd); fprintf(fd, " /im_y im_y %lu add def\n", (unsigned long) tile_height); fputs(" } if\n", fd); } } if (tile_height < h) { if (tile_width >= w) { fprintf(fd, " /im_y im_y %lu add def\n", (unsigned long) tile_height); if (!TIFFIsTiled(tif)) { fprintf(fd, " /im_h %lu im_y sub", (unsigned long) h); fprintf(fd, " dup %lu gt { pop", (unsigned long) tile_height); fprintf(fd, " %lu } if def\n", (unsigned long) tile_height); } } } fputs("} repeat\n", fd); } /* * End of exec function */ fputs("}\n", fd); return(use_rawdata); } #define MAXLINE 36 static int PS_Lvl2page(FILE* fd, TIFF* tif, uint32 w, uint32 h) { uint16 fillorder; int use_rawdata, tiled_image, breaklen = MAXLINE; uint32 chunk_no, num_chunks, *bc; unsigned char *buf_data, *cp; tsize_t chunk_size, byte_count; #if defined( EXP_ASCII85ENCODER ) int ascii85_l; /* Length, in bytes, of ascii85_p[] data */ uint8 * ascii85_p = 0; /* Holds ASCII85 encoded data */ #endif PS_Lvl2colorspace(fd, tif); use_rawdata = PS_Lvl2ImageDict(fd, tif, w, h); /* See http://bugzilla.remotesensing.org/show_bug.cgi?id=80 */ #ifdef ENABLE_BROKEN_BEGINENDDATA fputs("%%BeginData:\n", fd); #endif fputs("exec\n", fd); tiled_image = TIFFIsTiled(tif); if (tiled_image) { num_chunks = TIFFNumberOfTiles(tif); TIFFGetField(tif, TIFFTAG_TILEBYTECOUNTS, &bc); } else { num_chunks = TIFFNumberOfStrips(tif); TIFFGetField(tif, TIFFTAG_STRIPBYTECOUNTS, &bc); } if (use_rawdata) { chunk_size = (tsize_t) bc[0]; for (chunk_no = 1; chunk_no < num_chunks; chunk_no++) if ((tsize_t) bc[chunk_no] > chunk_size) chunk_size = (tsize_t) bc[chunk_no]; } else { if (tiled_image) chunk_size = TIFFTileSize(tif); else chunk_size = TIFFStripSize(tif); } buf_data = (unsigned char *)_TIFFmalloc(chunk_size); if (!buf_data) { TIFFError(filename, "Can't alloc %u bytes for %s.", chunk_size, tiled_image ? "tiles" : "strips"); return(FALSE); } #if defined( EXP_ASCII85ENCODER ) if ( ascii85 ) { /* * Allocate a buffer to hold the ASCII85 encoded data. Note * that it is allocated with sufficient room to hold the * encoded data (5*chunk_size/4) plus the EOD marker (+8) * and formatting line breaks. The line breaks are more * than taken care of by using 6*chunk_size/4 rather than * 5*chunk_size/4. */ ascii85_p = _TIFFmalloc( (chunk_size+(chunk_size/2)) + 8 ); if ( !ascii85_p ) { _TIFFfree( buf_data ); TIFFError( filename, "Cannot allocate ASCII85 encoding buffer." ); return ( FALSE ); } } #endif TIFFGetFieldDefaulted(tif, TIFFTAG_FILLORDER, &fillorder); for (chunk_no = 0; chunk_no < num_chunks; chunk_no++) { if (ascii85) Ascii85Init(); else breaklen = MAXLINE; if (use_rawdata) { if (tiled_image) byte_count = TIFFReadRawTile(tif, chunk_no, buf_data, chunk_size); else byte_count = TIFFReadRawStrip(tif, chunk_no, buf_data, chunk_size); if (fillorder == FILLORDER_LSB2MSB) TIFFReverseBits(buf_data, byte_count); } else { if (tiled_image) byte_count = TIFFReadEncodedTile(tif, chunk_no, buf_data, chunk_size); else byte_count = TIFFReadEncodedStrip(tif, chunk_no, buf_data, chunk_size); } if (byte_count < 0) { TIFFError(filename, "Can't read %s %d.", tiled_image ? "tile" : "strip", chunk_no); if (ascii85) Ascii85Put('\0', fd); } /* * For images with alpha, matte against a white background; * i.e. Cback * (1 - Aimage) where Cback = 1. We will fill the * lower part of the buffer with the modified values. * * XXX: needs better solution */ if (alpha) { int adjust, i, j = 0; int ncomps = samplesperpixel - extrasamples; for (i = 0; i < byte_count; i+=samplesperpixel) { adjust = 255 - buf_data[i + ncomps]; switch (ncomps) { case 1: buf_data[j++] = buf_data[i] + adjust; break; case 2: buf_data[j++] = buf_data[i] + adjust; buf_data[j++] = buf_data[i+1] + adjust; break; case 3: buf_data[j++] = buf_data[i] + adjust; buf_data[j++] = buf_data[i+1] + adjust; buf_data[j++] = buf_data[i+2] + adjust; break; } } byte_count -= j; } if (ascii85) { #if defined( EXP_ASCII85ENCODER ) ascii85_l = Ascii85EncodeBlock(ascii85_p, 1, buf_data, byte_count ); if ( ascii85_l > 0 ) fwrite( ascii85_p, ascii85_l, 1, fd ); #else for (cp = buf_data; byte_count > 0; byte_count--) Ascii85Put(*cp++, fd); #endif } else { for (cp = buf_data; byte_count > 0; byte_count--) { putc(hex[((*cp)>>4)&0xf], fd); putc(hex[(*cp)&0xf], fd); cp++; if (--breaklen <= 0) { putc('\n', fd); breaklen = MAXLINE; } } } if ( !ascii85 ) { if ( level2 || level3 ) putc( '>', fd ); putc('\n', fd); } #if !defined( EXP_ASCII85ENCODER ) else Ascii85Flush(fd); #endif } #if defined( EXP_ASCII85ENCODER ) if ( ascii85_p ) _TIFFfree( ascii85_p ); #endif _TIFFfree(buf_data); #ifdef ENABLE_BROKEN_BEGINENDDATA fputs("%%EndData\n", fd); #endif return(TRUE); } void PSpage(FILE* fd, TIFF* tif, uint32 w, uint32 h) { char * imageOp = "image"; if ( useImagemask && (bitspersample == 1) ) imageOp = "imagemask"; if ((level2 || level3) && PS_Lvl2page(fd, tif, w, h)) return; ps_bytesperrow = tf_bytesperrow - (extrasamples * bitspersample / 8)*w; switch (photometric) { case PHOTOMETRIC_RGB: if (planarconfiguration == PLANARCONFIG_CONTIG) { fprintf(fd, "%s", RGBcolorimage); PSColorContigPreamble(fd, w, h, 3); PSDataColorContig(fd, tif, w, h, 3); } else { PSColorSeparatePreamble(fd, w, h, 3); PSDataColorSeparate(fd, tif, w, h, 3); } break; case PHOTOMETRIC_SEPARATED: /* XXX should emit CMYKcolorimage */ if (planarconfiguration == PLANARCONFIG_CONTIG) { PSColorContigPreamble(fd, w, h, 4); PSDataColorContig(fd, tif, w, h, 4); } else { PSColorSeparatePreamble(fd, w, h, 4); PSDataColorSeparate(fd, tif, w, h, 4); } break; case PHOTOMETRIC_PALETTE: fprintf(fd, "%s", RGBcolorimage); PhotoshopBanner(fd, w, h, 1, 3, "false 3 colorimage"); fprintf(fd, "/scanLine %ld string def\n", (long) ps_bytesperrow * 3L); fprintf(fd, "%lu %lu 8\n", (unsigned long) w, (unsigned long) h); fprintf(fd, "[%lu 0 0 -%lu 0 %lu]\n", (unsigned long) w, (unsigned long) h, (unsigned long) h); fprintf(fd, "{currentfile scanLine readhexstring pop} bind\n"); fprintf(fd, "false 3 colorimage\n"); PSDataPalette(fd, tif, w, h); break; case PHOTOMETRIC_MINISBLACK: case PHOTOMETRIC_MINISWHITE: PhotoshopBanner(fd, w, h, 1, 1, imageOp); fprintf(fd, "/scanLine %ld string def\n", (long) ps_bytesperrow); fprintf(fd, "%lu %lu %d\n", (unsigned long) w, (unsigned long) h, bitspersample); fprintf(fd, "[%lu 0 0 -%lu 0 %lu]\n", (unsigned long) w, (unsigned long) h, (unsigned long) h); fprintf(fd, "{currentfile scanLine readhexstring pop} bind\n"); fprintf(fd, "%s\n", imageOp); PSDataBW(fd, tif, w, h); break; } putc('\n', fd); } void PSColorContigPreamble(FILE* fd, uint32 w, uint32 h, int nc) { ps_bytesperrow = nc * (tf_bytesperrow / samplesperpixel); PhotoshopBanner(fd, w, h, 1, nc, "false %d colorimage"); fprintf(fd, "/line %ld string def\n", (long) ps_bytesperrow); fprintf(fd, "%lu %lu %d\n", (unsigned long) w, (unsigned long) h, bitspersample); fprintf(fd, "[%lu 0 0 -%lu 0 %lu]\n", (unsigned long) w, (unsigned long) h, (unsigned long) h); fprintf(fd, "{currentfile line readhexstring pop} bind\n"); fprintf(fd, "false %d colorimage\n", nc); } void PSColorSeparatePreamble(FILE* fd, uint32 w, uint32 h, int nc) { int i; PhotoshopBanner(fd, w, h, ps_bytesperrow, nc, "true %d colorimage"); for (i = 0; i < nc; i++) fprintf(fd, "/line%d %ld string def\n", i, (long) ps_bytesperrow); fprintf(fd, "%lu %lu %d\n", (unsigned long) w, (unsigned long) h, bitspersample); fprintf(fd, "[%lu 0 0 -%lu 0 %lu] \n", (unsigned long) w, (unsigned long) h, (unsigned long) h); for (i = 0; i < nc; i++) fprintf(fd, "{currentfile line%d readhexstring pop}bind\n", i); fprintf(fd, "true %d colorimage\n", nc); } #define DOBREAK(len, howmany, fd) \ if (((len) -= (howmany)) <= 0) { \ putc('\n', fd); \ (len) = MAXLINE-(howmany); \ } #define PUTHEX(c,fd) putc(hex[((c)>>4)&0xf],fd); putc(hex[(c)&0xf],fd) void PSDataColorContig(FILE* fd, TIFF* tif, uint32 w, uint32 h, int nc) { uint32 row; int breaklen = MAXLINE, cc, es = samplesperpixel - nc; unsigned char *tf_buf; unsigned char *cp, c; (void) w; tf_buf = (unsigned char *) _TIFFmalloc(tf_bytesperrow); if (tf_buf == NULL) { TIFFError(filename, "No space for scanline buffer"); return; } for (row = 0; row < h; row++) { if (TIFFReadScanline(tif, tf_buf, row, 0) < 0) break; cp = tf_buf; if (alpha) { int adjust; cc = 0; for (; cc < tf_bytesperrow; cc += samplesperpixel) { DOBREAK(breaklen, nc, fd); /* * For images with alpha, matte against * a white background; i.e. * Cback * (1 - Aimage) * where Cback = 1. */ adjust = 255 - cp[nc]; switch (nc) { case 4: c = *cp++ + adjust; PUTHEX(c,fd); case 3: c = *cp++ + adjust; PUTHEX(c,fd); case 2: c = *cp++ + adjust; PUTHEX(c,fd); case 1: c = *cp++ + adjust; PUTHEX(c,fd); } cp += es; } } else { cc = 0; for (; cc < tf_bytesperrow; cc += samplesperpixel) { DOBREAK(breaklen, nc, fd); switch (nc) { case 4: c = *cp++; PUTHEX(c,fd); case 3: c = *cp++; PUTHEX(c,fd); case 2: c = *cp++; PUTHEX(c,fd); case 1: c = *cp++; PUTHEX(c,fd); } cp += es; } } } _TIFFfree((char *) tf_buf); } void PSDataColorSeparate(FILE* fd, TIFF* tif, uint32 w, uint32 h, int nc) { uint32 row; int breaklen = MAXLINE, cc; tsample_t s, maxs; unsigned char *tf_buf; unsigned char *cp, c; (void) w; tf_buf = (unsigned char *) _TIFFmalloc(tf_bytesperrow); if (tf_buf == NULL) { TIFFError(filename, "No space for scanline buffer"); return; } maxs = (samplesperpixel > nc ? nc : samplesperpixel); for (row = 0; row < h; row++) { for (s = 0; s < maxs; s++) { if (TIFFReadScanline(tif, tf_buf, row, s) < 0) break; for (cp = tf_buf, cc = 0; cc < tf_bytesperrow; cc++) { DOBREAK(breaklen, 1, fd); c = *cp++; PUTHEX(c,fd); } } } _TIFFfree((char *) tf_buf); } #define PUTRGBHEX(c,fd) \ PUTHEX(rmap[c],fd); PUTHEX(gmap[c],fd); PUTHEX(bmap[c],fd) void PSDataPalette(FILE* fd, TIFF* tif, uint32 w, uint32 h) { uint16 *rmap, *gmap, *bmap; uint32 row; int breaklen = MAXLINE, cc, nc; unsigned char *tf_buf; unsigned char *cp, c; (void) w; if (!TIFFGetField(tif, TIFFTAG_COLORMAP, &rmap, &gmap, &bmap)) { TIFFError(filename, "Palette image w/o \"Colormap\" tag"); return; } switch (bitspersample) { case 8: case 4: case 2: case 1: break; default: TIFFError(filename, "Depth %d not supported", bitspersample); return; } nc = 3 * (8 / bitspersample); tf_buf = (unsigned char *) _TIFFmalloc(tf_bytesperrow); if (tf_buf == NULL) { TIFFError(filename, "No space for scanline buffer"); return; } if (checkcmap(tif, 1<= 0; i--) { rmap[i] = CVT(rmap[i]); gmap[i] = CVT(gmap[i]); bmap[i] = CVT(bmap[i]); } #undef CVT } for (row = 0; row < h; row++) { if (TIFFReadScanline(tif, tf_buf, row, 0) < 0) break; for (cp = tf_buf, cc = 0; cc < tf_bytesperrow; cc++) { DOBREAK(breaklen, nc, fd); switch (bitspersample) { case 8: c = *cp++; PUTRGBHEX(c, fd); break; case 4: c = *cp++; PUTRGBHEX(c&0xf, fd); c >>= 4; PUTRGBHEX(c, fd); break; case 2: c = *cp++; PUTRGBHEX(c&0x3, fd); c >>= 2; PUTRGBHEX(c&0x3, fd); c >>= 2; PUTRGBHEX(c&0x3, fd); c >>= 2; PUTRGBHEX(c, fd); break; case 1: c = *cp++; PUTRGBHEX(c&0x1, fd); c >>= 1; PUTRGBHEX(c&0x1, fd); c >>= 1; PUTRGBHEX(c&0x1, fd); c >>= 1; PUTRGBHEX(c&0x1, fd); c >>= 1; PUTRGBHEX(c&0x1, fd); c >>= 1; PUTRGBHEX(c&0x1, fd); c >>= 1; PUTRGBHEX(c&0x1, fd); c >>= 1; PUTRGBHEX(c, fd); break; } } } _TIFFfree((char *) tf_buf); } void PSDataBW(FILE* fd, TIFF* tif, uint32 w, uint32 h) { int breaklen = MAXLINE; unsigned char* tf_buf; unsigned char* cp; tsize_t stripsize = TIFFStripSize(tif); tstrip_t s; #if defined( EXP_ASCII85ENCODER ) int ascii85_l; /* Length, in bytes, of ascii85_p[] data */ uint8 *ascii85_p = 0; /* Holds ASCII85 encoded data */ #endif (void) w; (void) h; tf_buf = (unsigned char *) _TIFFmalloc(stripsize); memset(tf_buf, 0, stripsize); if (tf_buf == NULL) { TIFFError(filename, "No space for scanline buffer"); return; } #if defined( EXP_ASCII85ENCODER ) if ( ascii85 ) { /* * Allocate a buffer to hold the ASCII85 encoded data. Note * that it is allocated with sufficient room to hold the * encoded data (5*stripsize/4) plus the EOD marker (+8) * and formatting line breaks. The line breaks are more * than taken care of by using 6*stripsize/4 rather than * 5*stripsize/4. */ ascii85_p = _TIFFmalloc( (stripsize+(stripsize/2)) + 8 ); if ( !ascii85_p ) { _TIFFfree( tf_buf ); TIFFError( filename, "Cannot allocate ASCII85 encoding buffer." ); return; } } #endif if (ascii85) Ascii85Init(); for (s = 0; s < TIFFNumberOfStrips(tif); s++) { int cc = TIFFReadEncodedStrip(tif, s, tf_buf, stripsize); if (cc < 0) { TIFFError(filename, "Can't read strip"); break; } cp = tf_buf; if (photometric == PHOTOMETRIC_MINISWHITE) { for (cp += cc; --cp >= tf_buf;) *cp = ~*cp; cp++; } if (ascii85) { #if defined( EXP_ASCII85ENCODER ) if (alpha) { int adjust, i; for (i = 0; i < cc; i+=2) { adjust = 255 - cp[i + 1]; cp[i / 2] = cp[i] + adjust; } cc /= 2; } ascii85_l = Ascii85EncodeBlock( ascii85_p, 1, cp, cc ); if ( ascii85_l > 0 ) fwrite( ascii85_p, ascii85_l, 1, fd ); #else while (cc-- > 0) Ascii85Put(*cp++, fd); #endif /* EXP_ASCII85_ENCODER */ } else { unsigned char c; if (alpha) { int adjust; while (cc-- > 0) { DOBREAK(breaklen, 1, fd); /* * For images with alpha, matte against * a white background; i.e. * Cback * (1 - Aimage) * where Cback = 1. */ adjust = 255 - cp[1]; c = *cp++ + adjust; PUTHEX(c,fd); cp++, cc--; } } else { while (cc-- > 0) { c = *cp++; DOBREAK(breaklen, 1, fd); PUTHEX(c, fd); } } } } if ( !ascii85 ) { if ( level2 || level3) fputs(">\n", fd); } #if !defined( EXP_ASCII85ENCODER ) else Ascii85Flush(fd); #else if ( ascii85_p ) _TIFFfree( ascii85_p ); #endif _TIFFfree(tf_buf); } static void Ascii85Init(void) { ascii85breaklen = 2*MAXLINE; ascii85count = 0; } static char* Ascii85Encode(unsigned char* raw) { static char encoded[6]; uint32 word; word = (((raw[0]<<8)+raw[1])<<16) + (raw[2]<<8) + raw[3]; if (word != 0L) { uint32 q; uint16 w1; q = word / (85L*85*85*85); /* actually only a byte */ encoded[0] = (char) (q + '!'); word -= q * (85L*85*85*85); q = word / (85L*85*85); encoded[1] = (char) (q + '!'); word -= q * (85L*85*85); q = word / (85*85); encoded[2] = (char) (q + '!'); w1 = (uint16) (word - q*(85L*85)); encoded[3] = (char) ((w1 / 85) + '!'); encoded[4] = (char) ((w1 % 85) + '!'); encoded[5] = '\0'; } else encoded[0] = 'z', encoded[1] = '\0'; return (encoded); } void Ascii85Put(unsigned char code, FILE* fd) { ascii85buf[ascii85count++] = code; if (ascii85count >= 4) { unsigned char* p; int n; for (n = ascii85count, p = ascii85buf; n >= 4; n -= 4, p += 4) { char* cp; for (cp = Ascii85Encode(p); *cp; cp++) { putc(*cp, fd); if (--ascii85breaklen == 0) { putc('\n', fd); ascii85breaklen = 2*MAXLINE; } } } _TIFFmemcpy(ascii85buf, p, n); ascii85count = n; } } void Ascii85Flush(FILE* fd) { if (ascii85count > 0) { char* res; _TIFFmemset(&ascii85buf[ascii85count], 0, 3); res = Ascii85Encode(ascii85buf); fwrite(res[0] == 'z' ? "!!!!" : res, ascii85count + 1, 1, fd); } fputs("~>\n", fd); } #if defined( EXP_ASCII85ENCODER) #define A85BREAKCNTR ascii85breaklen #define A85BREAKLEN (2*MAXLINE) /***************************************************************************** * * Name: Ascii85EncodeBlock( ascii85_p, f_eod, raw_p, raw_l ) * * Description: This routine will encode the raw data in the buffer described * by raw_p and raw_l into ASCII85 format and store the encoding * in the buffer given by ascii85_p. * * Parameters: ascii85_p - A buffer supplied by the caller which will * contain the encoded ASCII85 data. * f_eod - Flag: Nz means to end the encoded buffer with * an End-Of-Data marker. * raw_p - Pointer to the buffer of data to be encoded * raw_l - Number of bytes in raw_p[] to be encoded * * Returns: (int) < 0 Error, see errno * >= 0 Number of bytes written to ascii85_p[]. * * Notes: An external variable given by A85BREAKCNTR is used to * determine when to insert newline characters into the * encoded data. As each byte is placed into ascii85_p this * external is decremented. If the variable is decrement to * or past zero then a newline is inserted into ascii85_p * and the A85BREAKCNTR is then reset to A85BREAKLEN. * Note: for efficiency reasons the A85BREAKCNTR variable * is not actually checked on *every* character * placed into ascii85_p but often only for every * 5 characters. * * THE CALLER IS RESPONSIBLE FOR ENSURING THAT ASCII85_P[] IS * SUFFICIENTLY LARGE TO THE ENCODED DATA! * You will need at least 5 * (raw_l/4) bytes plus space for * newline characters and space for an EOD marker (if * requested). A safe calculation is to use 6*(raw_l/4) + 8 * to size ascii85_p. * *****************************************************************************/ int Ascii85EncodeBlock( uint8 * ascii85_p, unsigned f_eod, const uint8 * raw_p, int raw_l ) { char ascii85[5]; /* Encoded 5 tuple */ int ascii85_l; /* Number of bytes written to ascii85_p[] */ int rc; /* Return code */ uint32 val32; /* Unencoded 4 tuple */ ascii85_l = 0; /* Nothing written yet */ if ( raw_p ) { --raw_p; /* Prepare for pre-increment fetches */ for ( ; raw_l > 3; raw_l -= 4 ) { val32 = *(++raw_p) << 24; val32 += *(++raw_p) << 16; val32 += *(++raw_p) << 8; val32 += *(++raw_p); if ( val32 == 0 ) /* Special case */ { ascii85_p[ascii85_l] = 'z'; rc = 1; } else { ascii85[4] = (char) ((val32 % 85) + 33); val32 /= 85; ascii85[3] = (char) ((val32 % 85) + 33); val32 /= 85; ascii85[2] = (char) ((val32 % 85) + 33); val32 /= 85; ascii85[1] = (char) ((val32 % 85) + 33); ascii85[0] = (char) ((val32 / 85) + 33); _TIFFmemcpy( &ascii85_p[ascii85_l], ascii85, sizeof(ascii85) ); rc = sizeof(ascii85); } ascii85_l += rc; if ( (A85BREAKCNTR -= rc) <= 0 ) { ascii85_p[ascii85_l] = '\n'; ++ascii85_l; A85BREAKCNTR = A85BREAKLEN; } } /* * Output any straggler bytes: */ if ( raw_l > 0 ) { int len; /* Output this many bytes */ len = raw_l + 1; val32 = *++raw_p << 24; /* Prime the pump */ if ( --raw_l > 0 ) val32 += *(++raw_p) << 16; if ( --raw_l > 0 ) val32 += *(++raw_p) << 8; val32 /= 85; ascii85[3] = (char) ((val32 % 85) + 33); val32 /= 85; ascii85[2] = (char) ((val32 % 85) + 33); val32 /= 85; ascii85[1] = (char) ((val32 % 85) + 33); ascii85[0] = (char) ((val32 / 85) + 33); _TIFFmemcpy( &ascii85_p[ascii85_l], ascii85, len ); ascii85_l += len; } } /* * If requested add an ASCII85 End Of Data marker: */ if ( f_eod ) { ascii85_p[ascii85_l++] = '~'; ascii85_p[ascii85_l++] = '>'; ascii85_p[ascii85_l++] = '\n'; } return ( ascii85_l ); } /* Ascii85EncodeBlock() */ #endif /* EXP_ASCII85ENCODER */ /* vim: set ts=8 sts=8 sw=8 noet: */