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view mupdf-source/thirdparty/leptonica/src/psio2.c @ 32:72c1b70d4f5c
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| author | Franz Glasner <fzglas.hg@dom66.de> |
|---|---|
| date | Sun, 21 Sep 2025 15:10:12 +0200 |
| parents | b50eed0cc0ef |
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/*====================================================================* - Copyright (C) 2001 Leptonica. All rights reserved. - - Redistribution and use in source and binary forms, with or without - modification, are permitted provided that the following conditions - are met: - 1. Redistributions of source code must retain the above copyright - notice, this list of conditions and the following disclaimer. - 2. Redistributions in binary form must reproduce the above - copyright notice, this list of conditions and the following - disclaimer in the documentation and/or other materials - provided with the distribution. - - THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR - A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL ANY - CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, - EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, - PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR - PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY - OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING - NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS - SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. *====================================================================*/ /*! * \file psio2.c * <pre> * * |=============================================================| * | Important note | * |=============================================================| * | Some of these functions require I/O libraries such as | * | libtiff, libjpeg, and libz. If you do not have these | * | libraries, some calls will fail. | * | | * | You can manually deactivate all PostScript writing by | * | setting this in environ.h: | * | \code | * | #define USE_PSIO 0 | * | \endcode | * | in environ.h. This will link psio2stub.c | * |=============================================================| * * These are lower-level functions that implement a PostScript * "device driver" for wrapping images in PostScript. The images * can be rendered by a PostScript interpreter for viewing, * using evince or gv. They can also be rasterized for printing, * using gs or an embedded interpreter in a PostScript printer. * And they can be converted to a pdf using gs (ps2pdf). * * For uncompressed images * l_int32 pixWritePSEmbed() * l_int32 pixWriteStreamPS() * char *pixWriteStringPS() * char *generateUncompressedPS() * static void getScaledParametersPS() * static l_int32 convertByteToHexAscii() * * For jpeg compressed images (use dct compression) * l_int32 convertJpegToPSEmbed() * l_int32 convertJpegToPS() * static l_int32 convertJpegToPSString() * static char *generateJpegPS() * * For g4 fax compressed images (use ccitt g4 compression) * l_int32 convertG4ToPSEmbed() * l_int32 convertG4ToPS() * static l_int32 convertG4ToPSString() * static char *generateG4PS() * * For multipage tiff images * l_int32 convertTiffMultipageToPS() * * For flate (gzip) compressed images (e.g., png) * l_int32 convertFlateToPSEmbed() * l_int32 convertFlateToPS() * static l_int32 convertFlateToPSString() * static char *generateFlatePS() * * Write to memory * l_int32 pixWriteMemPS() * * Converting resolution * l_int32 getResLetterPage() * static l_int32 getResA4Page() * * Setting flag for writing bounding box hint * void l_psWriteBoundingBox() * * See psio1.c for higher-level functions and their usage. * </pre> */ #ifdef HAVE_CONFIG_H #include <config_auto.h> #endif /* HAVE_CONFIG_H */ #include <string.h> #include "allheaders.h" /* --------------------------------------------*/ #if USE_PSIO /* defined in environ.h */ /* --------------------------------------------*/ /* Set default for writing bounding box hint */ static l_int32 var_PS_WRITE_BOUNDING_BOX = 1; #define Bufsize 512 static const l_int32 DefaultInputRes = 300; /* typical scan res, ppi */ static const l_int32 MinRes = 5; static const l_int32 MaxRes = 3000; /* For computing resolution that fills page to desired amount */ static const l_int32 LetterWidth = 612; /* points */ static const l_int32 LetterHeight = 792; /* points */ static const l_int32 A4Width = 595; /* points */ static const l_int32 A4Height = 842; /* points */ static const l_float32 DefaultFillFraction = 0.95f; #ifndef NO_CONSOLE_IO #define DEBUG_JPEG 0 #define DEBUG_G4 0 #define DEBUG_FLATE 0 #endif /* ~NO_CONSOLE_IO */ /* Note that the bounding box hint at the top of the generated PostScript * file is required for the "*Embed" functions. These generate a * PostScript file for an individual image that can be translated and * scaled by an application that embeds the image in its output * (e.g., in the PS output from a TeX file). * However, bounding box hints should not be embedded in any * PostScript image that will be composited with other images, * where more than one image may be placed in an arbitrary location * on a page. */ /* Static helper functions */ static void getScaledParametersPS(BOX *box, l_int32 wpix, l_int32 hpix, l_int32 res, l_float32 scale, l_float32 *pxpt, l_float32 *pypt, l_float32 *pwpt, l_float32 *phpt); static void convertByteToHexAscii(l_uint8 byteval, char *pnib1, char *pnib2); static l_ok convertJpegToPSString(const char *filein, char **poutstr, l_int32 *pnbytes, l_int32 x, l_int32 y, l_int32 res, l_float32 scale, l_int32 pageno, l_int32 endpage); static char *generateJpegPS(const char *filein, L_COMP_DATA *cid, l_float32 xpt, l_float32 ypt, l_float32 wpt, l_float32 hpt, l_int32 pageno, l_int32 endpage); static l_ok convertG4ToPSString(const char *filein, char **poutstr, l_int32 *pnbytes, l_int32 x, l_int32 y, l_int32 res, l_float32 scale, l_int32 pageno, l_int32 maskflag, l_int32 endpage); static char *generateG4PS(const char *filein, L_COMP_DATA *cid, l_float32 xpt, l_float32 ypt, l_float32 wpt, l_float32 hpt, l_int32 maskflag, l_int32 pageno, l_int32 endpage); static l_ok convertFlateToPSString(const char *filein, char **poutstr, l_int32 *pnbytes, l_int32 x, l_int32 y, l_int32 res, l_float32 scale, l_int32 pageno, l_int32 endpage); static char *generateFlatePS(const char *filein, L_COMP_DATA *cid, l_float32 xpt, l_float32 ypt, l_float32 wpt, l_float32 hpt, l_int32 pageno, l_int32 endpage); /*-------------------------------------------------------------* * For uncompressed images * *-------------------------------------------------------------*/ /*! * \brief pixWritePSEmbed() * * \param[in] filein input file, all depths, colormap OK * \param[in] fileout output ps file * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) This is a simple wrapper function that generates an * uncompressed PS file, with a bounding box. * (2) The bounding box is required when a program such as TeX * (through epsf) places and rescales the image. * (3) The bounding box is sized for fitting the image to an * 8.5 x 11.0 inch page. * </pre> */ l_ok pixWritePSEmbed(const char *filein, const char *fileout) { l_int32 w, h, ret; l_float32 scale; FILE *fp; PIX *pix; if (!filein) return ERROR_INT("filein not defined", __func__, 1); if (!fileout) return ERROR_INT("fileout not defined", __func__, 1); if ((pix = pixRead(filein)) == NULL) return ERROR_INT("image not read from file", __func__, 1); w = pixGetWidth(pix); h = pixGetHeight(pix); if (w * 11.0 > h * 8.5) scale = 8.5f * 300.f / (l_float32)w; else scale = 11.0f * 300.f / (l_float32)h; if ((fp = fopenWriteStream(fileout, "wb")) == NULL) return ERROR_INT_1("file not opened for write", fileout, __func__, 1); ret = pixWriteStreamPS(fp, pix, NULL, 0, scale); fclose(fp); pixDestroy(&pix); return ret; } /*! * \brief pixWriteStreamPS() * * \param[in] fp file stream * \param[in] pix * \param[in] box [optional] * \param[in] res can use 0 for default of 300 ppi * \param[in] scale to prevent scaling, use either 1.0 or 0.0 * \return 0 if OK; 1 on error * * <pre> * Notes: * (1) This writes image in PS format, optionally scaled, * adjusted for the printer resolution, and with * a bounding box. * (2) For details on use of parameters, see pixWriteStringPS(). * </pre> */ l_ok pixWriteStreamPS(FILE *fp, PIX *pix, BOX *box, l_int32 res, l_float32 scale) { char *outstr; l_int32 length; PIX *pixc; if (!fp) return (l_int32)ERROR_INT("stream not open", __func__, 1); if (!pix) return (l_int32)ERROR_INT("pix not defined", __func__, 1); if ((pixc = pixConvertForPSWrap(pix)) == NULL) return (l_int32)ERROR_INT("pixc not made", __func__, 1); if ((outstr = pixWriteStringPS(pixc, box, res, scale)) == NULL) { pixDestroy(&pixc); return (l_int32)ERROR_INT("outstr not made", __func__, 1); } length = strlen(outstr); fwrite(outstr, 1, length, fp); LEPT_FREE(outstr); pixDestroy(&pixc); return 0; } /*! * \brief pixWriteStringPS() * * \param[in] pixs all depths, colormap OK * \param[in] box bounding box; can be NULL * \param[in] res resolution, in printer ppi. Use 0 for default 300 ppi. * \param[in] scale scale factor. If no scaling is desired, use * either 1.0 or 0.0. Scaling just resets the resolution * parameter; the actual scaling is done in the * interpreter at rendering time. This is important: * it allows you to scale the image up without * increasing the file size. * \return ps string if OK, or NULL on error * * <pre> * a) If %box == NULL, image is placed, optionally scaled, * in a standard b.b. at the center of the page. * This is to be used when another program like * TeX through epsf places the image. * b) If %box != NULL, image is placed without a * b.b. at the specified page location and with * optional scaling. This is to be used when * you want to specify exactly where and optionally * how big you want the image to be. * Note that all coordinates are in PS convention, * with 0,0 at LL corner of the page: * x,y location of LL corner of image, in mils. * w,h scaled size, in mils. Use 0 to * scale with "scale" and "res" input. * * %scale: If no scaling is desired, use either 1.0 or 0.0. * Scaling just resets the resolution parameter; the actual * scaling is done in the interpreter at rendering time. * This is important: * it allows you to scale the image up * without increasing the file size. * * Notes: * (1) OK, this seems a bit complicated, because there are various * ways to scale and not to scale. Here's a summary: * (2) If you don't want any scaling at all: * * if you are using a box: * set w = 0, h = 0, and use scale = 1.0; it will print * each pixel unscaled at printer resolution * * if you are not using a box: * set scale = 1.0; it will print at printer resolution * (3) If you want the image to be a certain size in inches: * * you must use a box and set the box (w,h) in mils * (4) If you want the image to be scaled by a scale factor != 1.0: * * if you are using a box: * set w = 0, h = 0, and use the desired scale factor; * the higher the printer resolution, the smaller the * image will actually appear. * * if you are not using a box: * set the desired scale factor; the higher the printer * resolution, the smaller the image will actually appear. * (5) Another complication is the proliferation of distance units: * * The interface distances are in milli-inches. * * Three different units are used internally: * ~ pixels (units of 1/res inch) * ~ printer pts (units of 1/72 inch) * ~ inches * * Here is a quiz on volume units from a reviewer: * How many UK milli-cups in a US kilo-teaspoon? * (Hint: 1.0 US cup = 0.75 UK cup + 0.2 US gill; * 1.0 US gill = 24.0 US teaspoons) * </pre> */ char * pixWriteStringPS(PIX *pixs, BOX *box, l_int32 res, l_float32 scale) { char nib1, nib2; char *hexdata, *outstr; l_uint8 byteval; l_int32 i, j, k, w, h, d; l_float32 wpt, hpt, xpt, ypt; l_int32 wpl, psbpl, hexbytes, boxflag, bps; l_uint32 *line, *data; PIX *pix; if (!pixs) return (char *)ERROR_PTR("pixs not defined", __func__, NULL); if ((pix = pixConvertForPSWrap(pixs)) == NULL) return (char *)ERROR_PTR("pix not made", __func__, NULL); pixGetDimensions(pix, &w, &h, &d); /* Get the factors by which PS scales and translates, in pts */ if (!box) boxflag = 0; /* no scaling; b.b. at center */ else boxflag = 1; /* no b.b., specify placement and optional scaling */ getScaledParametersPS(box, w, h, res, scale, &xpt, &ypt, &wpt, &hpt); if (d == 1) bps = 1; /* bits/sample */ else /* d == 8 || d == 32 */ bps = 8; /* Convert image data to hex string. psbpl is the number of * bytes in each raster line when it is packed to the byte * boundary (not the 32 bit word boundary, as with the pix). * When converted to hex, the hex string has 2 bytes for * every byte of raster data. */ wpl = pixGetWpl(pix); if (d == 1 || d == 8) psbpl = (w * d + 7) / 8; else /* d == 32 */ psbpl = 3 * w; data = pixGetData(pix); hexbytes = 2 * psbpl * h; /* size of ps hex array */ if ((hexdata = (char *)LEPT_CALLOC(hexbytes + 1, sizeof(char))) == NULL) return (char *)ERROR_PTR("hexdata not made", __func__, NULL); if (d == 1 || d == 8) { for (i = 0, k = 0; i < h; i++) { line = data + i * wpl; for (j = 0; j < psbpl; j++) { byteval = GET_DATA_BYTE(line, j); convertByteToHexAscii(byteval, &nib1, &nib2); hexdata[k++] = nib1; hexdata[k++] = nib2; } } } else { /* d == 32; hexdata bytes packed RGBRGB..., 2 per sample */ for (i = 0, k = 0; i < h; i++) { line = data + i * wpl; for (j = 0; j < w; j++) { byteval = GET_DATA_BYTE(line + j, 0); /* red */ convertByteToHexAscii(byteval, &nib1, &nib2); hexdata[k++] = nib1; hexdata[k++] = nib2; byteval = GET_DATA_BYTE(line + j, 1); /* green */ convertByteToHexAscii(byteval, &nib1, &nib2); hexdata[k++] = nib1; hexdata[k++] = nib2; byteval = GET_DATA_BYTE(line + j, 2); /* blue */ convertByteToHexAscii(byteval, &nib1, &nib2); hexdata[k++] = nib1; hexdata[k++] = nib2; } } } hexdata[k] = '\0'; outstr = generateUncompressedPS(hexdata, w, h, d, psbpl, bps, xpt, ypt, wpt, hpt, boxflag); pixDestroy(&pix); if (!outstr) return (char *)ERROR_PTR("outstr not made", __func__, NULL); return outstr; } /*! * \brief generateUncompressedPS() * * \param[in] hexdata * \param[in] w, h raster image size in pixels * \param[in] d image depth in bpp; rgb is 32 * \param[in] psbpl raster bytes/line, when packed to the byte boundary * \param[in] bps bits/sample: either 1 or 8 * \param[in] xpt, ypt location of LL corner of image, in pts, relative * to the PostScript origin (0,0) at the LL corner * of the page * \param[in] wpt, hpt rendered image size in pts * \param[in] boxflag 1 to print out bounding box hint; 0 to skip * \return PS string, or NULL on error * * <pre> * Notes: * (1) Low-level function. * </pre> */ char * generateUncompressedPS(char *hexdata, l_int32 w, l_int32 h, l_int32 d, l_int32 psbpl, l_int32 bps, l_float32 xpt, l_float32 ypt, l_float32 wpt, l_float32 hpt, l_int32 boxflag) { char *outstr; char bigbuf[Bufsize]; SARRAY *sa; if (!hexdata) return (char *)ERROR_PTR("hexdata not defined", __func__, NULL); sa = sarrayCreate(0); sarrayAddString(sa, "%!Adobe-PS", L_COPY); if (boxflag == 0) { snprintf(bigbuf, sizeof(bigbuf), "%%%%BoundingBox: %7.2f %7.2f %7.2f %7.2f", xpt, ypt, xpt + wpt, ypt + hpt); sarrayAddString(sa, bigbuf, L_COPY); } else { /* boxflag == 1 */ sarrayAddString(sa, "gsave", L_COPY); } if (d == 1) sarrayAddString(sa, "{1 exch sub} settransfer %invert binary", L_COPY); snprintf(bigbuf, sizeof(bigbuf), "/bpl %d string def %%bpl as a string", psbpl); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%7.2f %7.2f translate %%set image origin in pts", xpt, ypt); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%7.2f %7.2f scale %%set image size in pts", wpt, hpt); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%d %d %d %%image dimensions in pixels", w, h, bps); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), "[%d %d %d %d %d %d] %%mapping matrix: [w 0 0 -h 0 h]", w, 0, 0, -h, 0, h); sarrayAddString(sa, bigbuf, L_COPY); if (boxflag == 0) { if (d == 1 || d == 8) sarrayAddString(sa, "{currentfile bpl readhexstring pop} image", L_COPY); else /* d == 32 */ sarrayAddString(sa, "{currentfile bpl readhexstring pop} false 3 colorimage", L_COPY); } else { /* boxflag == 1 */ if (d == 1 || d == 8) sarrayAddString(sa, "{currentfile bpl readhexstring pop} bind image", L_COPY); else /* d == 32 */ sarrayAddString(sa, "{currentfile bpl readhexstring pop} bind false 3 colorimage", L_COPY); } sarrayAddString(sa, hexdata, L_INSERT); if (boxflag == 0) sarrayAddString(sa, "\nshowpage", L_COPY); else /* boxflag == 1 */ sarrayAddString(sa, "\ngrestore", L_COPY); outstr = sarrayToString(sa, 1); sarrayDestroy(&sa); if (!outstr) L_ERROR("outstr not made\n", __func__); return outstr; } /*! * \brief getScaledParametersPS() * * \param[in] box [optional] location of image in mils; x,y is LL corner * \param[in] wpix pix width in pixels * \param[in] hpix pix height in pixels * \param[in] res of printer; use 0 for default * \param[in] scale use 1.0 or 0.0 for no scaling * \param[out] pxpt location of llx in pts * \param[out] pypt location of lly in pts * \param[out] pwpt image width in pts * \param[out] phpt image height in pts * \return void no arg checking * * <pre> * Notes: * (1) The image is always scaled, depending on res and scale. * (2) If no box, the image is centered on the page. * (3) If there is a box, the image is placed within it. * </pre> */ static void getScaledParametersPS(BOX *box, l_int32 wpix, l_int32 hpix, l_int32 res, l_float32 scale, l_float32 *pxpt, l_float32 *pypt, l_float32 *pwpt, l_float32 *phpt) { l_int32 bx, by, bw, bh; l_float32 winch, hinch, xinch, yinch, fres; if (res == 0) res = DefaultInputRes; fres = (l_float32)res; /* Allow the PS interpreter to scale the resolution */ if (scale == 0.0) scale = 1.0; if (scale != 1.0) { fres = (l_float32)res / scale; res = (l_int32)fres; } /* Limit valid resolution interval */ if (res < MinRes || res > MaxRes) { L_WARNING("res %d out of bounds; using default res; no scaling\n", __func__, res); res = DefaultInputRes; fres = (l_float32)res; } if (!box) { /* center on page */ winch = (l_float32)wpix / fres; hinch = (l_float32)hpix / fres; xinch = (8.5f - winch) / 2.f; yinch = (11.0f - hinch) / 2.f; } else { boxGetGeometry(box, &bx, &by, &bw, &bh); if (bw == 0) winch = (l_float32)wpix / fres; else winch = (l_float32)bw / 1000.f; if (bh == 0) hinch = (l_float32)hpix / fres; else hinch = (l_float32)bh / 1000.f; xinch = (l_float32)bx / 1000.f; yinch = (l_float32)by / 1000.f; } if (xinch < 0) L_WARNING("left edge < 0.0 inch\n", __func__); if (xinch + winch > 8.5) L_WARNING("right edge > 8.5 inch\n", __func__); if (yinch < 0.0) L_WARNING("bottom edge < 0.0 inch\n", __func__); if (yinch + hinch > 11.0) L_WARNING("top edge > 11.0 inch\n", __func__); *pwpt = 72.f * winch; *phpt = 72.f * hinch; *pxpt = 72.f * xinch; *pypt = 72.f * yinch; return; } /*! * \brief convertByteToHexAscii() * * \param[in] byteval input byte * \param[out] pnib1, pnib2 two hex ascii characters * \return void */ static void convertByteToHexAscii(l_uint8 byteval, char *pnib1, char *pnib2) { l_uint8 nib; nib = byteval >> 4; if (nib < 10) *pnib1 = '0' + nib; else *pnib1 = 'a' + (nib - 10); nib = byteval & 0xf; if (nib < 10) *pnib2 = '0' + nib; else *pnib2 = 'a' + (nib - 10); return; } /*-------------------------------------------------------------* * For jpeg compressed images * *-------------------------------------------------------------*/ /*! * \brief convertJpegToPSEmbed() * * \param[in] filein input jpeg file * \param[in] fileout output ps file * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) This function takes a jpeg file as input and generates a DCT * compressed, ascii85 encoded PS file, with a bounding box. * (2) The bounding box is required when a program such as TeX * (through epsf) places and rescales the image. * (3) The bounding box is sized for fitting the image to an * 8.5 x 11.0 inch page. * </pre> */ l_ok convertJpegToPSEmbed(const char *filein, const char *fileout) { char *outstr; l_int32 w, h, nbytes, ret; l_float32 xpt, ypt, wpt, hpt; L_COMP_DATA *cid; if (!filein) return ERROR_INT("filein not defined", __func__, 1); if (!fileout) return ERROR_INT("fileout not defined", __func__, 1); /* Generate the ascii encoded jpeg data */ if ((cid = l_generateJpegData(filein, 1)) == NULL) return ERROR_INT("jpeg data not made", __func__, 1); w = cid->w; h = cid->h; /* Scale for 20 pt boundary and otherwise full filling * in one direction on 8.5 x 11 inch device */ xpt = 20.0; ypt = 20.0; if (w * 11.0 > h * 8.5) { wpt = 572.0; /* 612 - 2 * 20 */ hpt = wpt * (l_float32)h / (l_float32)w; } else { hpt = 752.0; /* 792 - 2 * 20 */ wpt = hpt * (l_float32)w / (l_float32)h; } /* Generate the PS. * The bounding box information should be inserted (default). */ outstr = generateJpegPS(NULL, cid, xpt, ypt, wpt, hpt, 1, 1); l_CIDataDestroy(&cid); if (!outstr) return ERROR_INT("outstr not made", __func__, 1); nbytes = strlen(outstr); ret = l_binaryWrite(fileout, "w", outstr, nbytes); LEPT_FREE(outstr); if (ret) L_ERROR("ps string not written to file\n", __func__); return ret; } /*! * \brief convertJpegToPS() * * \param[in] filein input jpeg file * \param[in] fileout output ps file * \param[in] operation "w" for write; "a" for append * \param[in] x, y location of LL corner of image, in pixels, relative * to the PostScript origin (0,0) at the LL corner * of the page * \param[in] res resolution of the input image, in ppi; * use 0 for default * \param[in] scale scaling by printer; use 0.0 or 1.0 for no scaling * \param[in] pageno page number; must start with 1; you can use 0 * if there is only one page * \param[in] endpage boolean: use TRUE if this is the last image to be * added to the page; FALSE otherwise * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) This is simpler to use than pixWriteStringPS(), and * it outputs in level 2 PS as compressed DCT (overlaid * with ascii85 encoding). * (2) An output file can contain multiple pages, each with * multiple images. The arguments to convertJpegToPS() * allow you to control placement of jpeg images on multiple * pages within a PostScript file. * (3) For the first image written to a file, use "w", which * opens for write and clears the file. For all subsequent * images written to that file, use "a". * (4) The (x, y) parameters give the LL corner of the image * relative to the LL corner of the page. They are in * units of pixels if scale = 1.0. If you use (e.g.) * scale = 2.0, the image is placed at (2x, 2y) on the page, * and the image dimensions are also doubled. * (5) Display vs printed resolution: * * If your display is 75 ppi and your image was created * at a resolution of 300 ppi, you can get the image * to print at the same size as it appears on your display * by either setting scale = 4.0 or by setting res = 75. * Both tell the printer to make a 4x enlarged image. * * If your image is generated at 150 ppi and you use scale = 1, * it will be rendered such that 150 pixels correspond * to 72 pts (1 inch on the printer). This function does * the conversion from pixels (with or without scaling) to * pts, which are the units that the printer uses. * * The printer will choose its own resolution to use * in rendering the image, which will not affect the size * of the rendered image. That is because the output * PostScript file describes the geometry in terms of pts, * which are defined to be 1/72 inch. The printer will * only see the size of the image in pts, through the * scale and translate parameters and the affine * transform (the ImageMatrix) of the image. * (6) To render multiple images on the same page, set * endpage = FALSE for each image until you get to the * last, for which you set endpage = TRUE. This causes the * "showpage" command to be invoked. Showpage outputs * the entire page and clears the raster buffer for the * next page to be added. Without a "showpage", * subsequent images from the next page will overlay those * previously put down. * (7) For multiple pages, increment the page number, starting * with page 1. This allows PostScript (and PDF) to build * a page directory, which viewers use for navigation. * </pre> */ l_ok convertJpegToPS(const char *filein, const char *fileout, const char *operation, l_int32 x, l_int32 y, l_int32 res, l_float32 scale, l_int32 pageno, l_int32 endpage) { char *outstr; l_int32 nbytes; if (!filein) return ERROR_INT("filein not defined", __func__, 1); if (!fileout) return ERROR_INT("fileout not defined", __func__, 1); if (strcmp(operation, "w") && strcmp(operation, "a")) return ERROR_INT("operation must be \"w\" or \"a\"", __func__, 1); if (convertJpegToPSString(filein, &outstr, &nbytes, x, y, res, scale, pageno, endpage)) return ERROR_INT("ps string not made", __func__, 1); if (l_binaryWrite(fileout, operation, outstr, nbytes)) { LEPT_FREE(outstr); return ERROR_INT("ps string not written to file", __func__, 1); } LEPT_FREE(outstr); return 0; } /*! * \brief convertJpegToPSString() * * Generates PS string in jpeg format from jpeg file * * \param[in] filein input jpeg file * \param[out] poutstr PS string * \param[out] pnbytes number of bytes in PS string * \param[in] x, y location of LL corner of image, in pixels, relative * to the PostScript origin (0,0) at the LL corner * of the page * \param[in] res resolution of the input image, in ppi; * use 0 for default * \param[in] scale scaling by printer; use 0.0 or 1.0 for no scaling * \param[in] pageno page number; must start with 1; you can use 0 * if there is only one page * \param[in] endpage boolean: use TRUE if this is the last image to be * added to the page; FALSE otherwise * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) For usage, see convertJpegToPS() * </pre> */ static l_ok convertJpegToPSString(const char *filein, char **poutstr, l_int32 *pnbytes, l_int32 x, l_int32 y, l_int32 res, l_float32 scale, l_int32 pageno, l_int32 endpage) { char *outstr; l_float32 xpt, ypt, wpt, hpt; L_COMP_DATA *cid; if (!poutstr) return ERROR_INT("&outstr not defined", __func__, 1); if (!pnbytes) return ERROR_INT("&nbytes not defined", __func__, 1); *poutstr = NULL; *pnbytes = 0; if (!filein) return ERROR_INT("filein not defined", __func__, 1); /* Generate the ascii encoded jpeg data */ if ((cid = l_generateJpegData(filein, 1)) == NULL) return ERROR_INT("jpeg data not made", __func__, 1); /* Get scaled location in pts. Guess the input scan resolution * based on the input parameter %res, the resolution data in * the pix, and the size of the image. */ if (scale == 0.0) scale = 1.0; if (res <= 0) { if (cid->res > 0) res = cid->res; else res = DefaultInputRes; } /* Get scaled location in pts */ if (scale == 0.0) scale = 1.0; xpt = scale * x * 72.f / res; ypt = scale * y * 72.f / res; wpt = scale * cid->w * 72.f / res; hpt = scale * cid->h * 72.f / res; if (pageno == 0) pageno = 1; #if DEBUG_JPEG lept_stderr("w = %d, h = %d, bps = %d, spp = %d\n", cid->w, cid->h, cid->bps, cid->spp); lept_stderr("comp bytes = %ld, nbytes85 = %ld, ratio = %5.3f\n", (unsigned long)cid->nbytescomp, (unsigned long)cid->nbytes85, (l_float32)cid->nbytes85 / (l_float32)cid->nbytescomp); lept_stderr("xpt = %7.2f, ypt = %7.2f, wpt = %7.2f, hpt = %7.2f\n", xpt, ypt, wpt, hpt); #endif /* DEBUG_JPEG */ /* Generate the PS */ outstr = generateJpegPS(NULL, cid, xpt, ypt, wpt, hpt, pageno, endpage); l_CIDataDestroy(&cid); if (!outstr) return ERROR_INT("outstr not made", __func__, 1); *poutstr = outstr; *pnbytes = strlen(outstr); return 0; } /*! * \brief generateJpegPS() * * \param[in] filein [optional] input jpeg filename; can be null * \param[in] cid jpeg compressed image data * \param[in] xpt, ypt location of LL corner of image, in pts, relative * to the PostScript origin (0,0) at the LL corner * of the page * \param[in] wpt, hpt rendered image size in pts * \param[in] pageno page number; must start with 1; you can use 0 * if there is only one page. * \param[in] endpage boolean: use TRUE if this is the last image to be * added to the page; FALSE otherwise * \return PS string, or NULL on error * * <pre> * Notes: * (1) Low-level function. * </pre> */ static char * generateJpegPS(const char *filein, L_COMP_DATA *cid, l_float32 xpt, l_float32 ypt, l_float32 wpt, l_float32 hpt, l_int32 pageno, l_int32 endpage) { l_int32 w, h, bps, spp; char *outstr; char bigbuf[Bufsize]; SARRAY *sa; if (!cid) return (char *)ERROR_PTR("jpeg data not defined", __func__, NULL); w = cid->w; h = cid->h; bps = cid->bps; spp = cid->spp; sa = sarrayCreate(50); sarrayAddString(sa, "%!PS-Adobe-3.0", L_COPY); sarrayAddString(sa, "%%Creator: leptonica", L_COPY); if (filein) snprintf(bigbuf, sizeof(bigbuf), "%%%%Title: %s", filein); else snprintf(bigbuf, sizeof(bigbuf), "%%%%Title: Jpeg compressed PS"); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, "%%DocumentData: Clean7Bit", L_COPY); if (var_PS_WRITE_BOUNDING_BOX == 1) { snprintf(bigbuf, sizeof(bigbuf), "%%%%BoundingBox: %7.2f %7.2f %7.2f %7.2f", xpt, ypt, xpt + wpt, ypt + hpt); sarrayAddString(sa, bigbuf, L_COPY); } sarrayAddString(sa, "%%LanguageLevel: 2", L_COPY); sarrayAddString(sa, "%%EndComments", L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%%%%Page: %d %d", pageno, pageno); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, "save", L_COPY); sarrayAddString(sa, "/RawData currentfile /ASCII85Decode filter def", L_COPY); sarrayAddString(sa, "/Data RawData << >> /DCTDecode filter def", L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%7.2f %7.2f translate %%set image origin in pts", xpt, ypt); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%7.2f %7.2f scale %%set image size in pts", wpt, hpt); sarrayAddString(sa, bigbuf, L_COPY); if (spp == 1) sarrayAddString(sa, "/DeviceGray setcolorspace", L_COPY); else if (spp == 3) sarrayAddString(sa, "/DeviceRGB setcolorspace", L_COPY); else /*spp == 4 */ sarrayAddString(sa, "/DeviceCMYK setcolorspace", L_COPY); sarrayAddString(sa, "{ << /ImageType 1", L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /Width %d", w); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /Height %d", h); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /ImageMatrix [ %d 0 0 %d 0 %d ]", w, -h, h); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, " /DataSource Data", L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /BitsPerComponent %d", bps); sarrayAddString(sa, bigbuf, L_COPY); if (spp == 1) sarrayAddString(sa, " /Decode [0 1]", L_COPY); else if (spp == 3) sarrayAddString(sa, " /Decode [0 1 0 1 0 1]", L_COPY); else /* spp == 4 */ sarrayAddString(sa, " /Decode [0 1 0 1 0 1 0 1]", L_COPY); sarrayAddString(sa, " >> image", L_COPY); sarrayAddString(sa, " Data closefile", L_COPY); sarrayAddString(sa, " RawData flushfile", L_COPY); if (endpage == TRUE) sarrayAddString(sa, " showpage", L_COPY); sarrayAddString(sa, " restore", L_COPY); sarrayAddString(sa, "} exec", L_COPY); /* Insert the ascii85 jpeg data; this is now owned by sa */ sarrayAddString(sa, cid->data85, L_INSERT); cid->data85 = NULL; /* it has been transferred and destroyed */ /* Generate and return the output string */ outstr = sarrayToString(sa, 1); sarrayDestroy(&sa); return outstr; } /*-------------------------------------------------------------* * For ccitt g4 compressed images * *-------------------------------------------------------------*/ /*! * \brief convertG4ToPSEmbed() * * \param[in] filein input tiff file * \param[in] fileout output ps file * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) This function takes a g4 compressed tif file as input and * generates a g4 compressed, ascii85 encoded PS file, with * a bounding box. * (2) The bounding box is required when a program such as TeX * (through epsf) places and rescales the image. * (3) The bounding box is sized for fitting the image to an * 8.5 x 11.0 inch page. * (4) We paint this through a mask, over whatever is below. * </pre> */ l_ok convertG4ToPSEmbed(const char *filein, const char *fileout) { char *outstr; l_int32 w, h, nbytes, ret; l_float32 xpt, ypt, wpt, hpt; L_COMP_DATA *cid; if (!filein) return ERROR_INT("filein not defined", __func__, 1); if (!fileout) return ERROR_INT("fileout not defined", __func__, 1); if ((cid = l_generateG4Data(filein, 1)) == NULL) return ERROR_INT("g4 data not made", __func__, 1); w = cid->w; h = cid->h; /* Scale for 20 pt boundary and otherwise full filling * in one direction on 8.5 x 11 inch device */ xpt = 20.0; ypt = 20.0; if (w * 11.0 > h * 8.5) { wpt = 572.0; /* 612 - 2 * 20 */ hpt = wpt * (l_float32)h / (l_float32)w; } else { hpt = 752.0; /* 792 - 2 * 20 */ wpt = hpt * (l_float32)w / (l_float32)h; } /* Generate the PS, painting through the image mask. * The bounding box information should be inserted (default). */ outstr = generateG4PS(NULL, cid, xpt, ypt, wpt, hpt, 1, 1, 1); l_CIDataDestroy(&cid); if (!outstr) return ERROR_INT("outstr not made", __func__, 1); nbytes = strlen(outstr); ret = l_binaryWrite(fileout, "w", outstr, nbytes); LEPT_FREE(outstr); if (ret) L_ERROR("ps string not written to file\n", __func__); return ret; } /*! * \brief convertG4ToPS() * * \param[in] filein input tiff g4 file * \param[in] fileout output ps file * \param[in] operation "w" for write; "a" for append * \param[in] x, y location of LL corner of image, in pixels, relative * to the PostScript origin (0,0) at the LL corner * of the page * \param[in] res resolution of the input image, in ppi; typ. values * are 300 and 600; use 0 for automatic determination * based on image size * \param[in] scale scaling by printer; use 0.0 or 1.0 for no scaling * \param[in] pageno page number; must start with 1; you can use 0 * if there is only one page. * \param[in] maskflag boolean: use TRUE if just painting through fg; * FALSE if painting both fg and bg. * \param[in] endpage boolean: use TRUE if this is the last image to be * added to the page; FALSE otherwise * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) See the usage comments in convertJpegToPS(), some of * which are repeated here. * (2) This is a wrapper for tiff g4. The PostScript that * is generated is expanded by about 5/4 (due to the * ascii85 encoding. If you convert to pdf (ps2pdf), the * ascii85 decoder is automatically invoked, so that the * pdf wrapped g4 file is essentially the same size as * the original g4 file. It's useful to have the PS * file ascii85 encoded, because many printers will not * print binary PS files. * (3) For the first image written to a file, use "w", which * opens for write and clears the file. For all subsequent * images written to that file, use "a". * (4) To render multiple images on the same page, set * endpage = FALSE for each image until you get to the * last, for which you set endpage = TRUE. This causes the * "showpage" command to be invoked. Showpage outputs * the entire page and clears the raster buffer for the * next page to be added. Without a "showpage", * subsequent images from the next page will overlay those * previously put down. * (5) For multiple images to the same page, where you are writing * both jpeg and tiff-g4, you have two options: * (a) write the g4 first, as either image (maskflag == FALSE) * or imagemask (maskflag == TRUE), and then write the * jpeg over it. * (b) write the jpeg first and as the last item, write * the g4 as an imagemask (maskflag == TRUE), to paint * through the foreground only. * We have this flexibility with the tiff-g4 because it is 1 bpp. * (6) For multiple pages, increment the page number, starting * with page 1. This allows PostScript (and PDF) to build * a page directory, which viewers use for navigation. * </pre> */ l_ok convertG4ToPS(const char *filein, const char *fileout, const char *operation, l_int32 x, l_int32 y, l_int32 res, l_float32 scale, l_int32 pageno, l_int32 maskflag, l_int32 endpage) { char *outstr; l_int32 nbytes, ret; if (!filein) return ERROR_INT("filein not defined", __func__, 1); if (!fileout) return ERROR_INT("fileout not defined", __func__, 1); if (strcmp(operation, "w") && strcmp(operation, "a")) return ERROR_INT("operation must be \"w\" or \"a\"", __func__, 1); if (convertG4ToPSString(filein, &outstr, &nbytes, x, y, res, scale, pageno, maskflag, endpage)) return ERROR_INT("ps string not made", __func__, 1); ret = l_binaryWrite(fileout, operation, outstr, nbytes); LEPT_FREE(outstr); if (ret) return ERROR_INT("ps string not written to file", __func__, 1); return 0; } /*! * \brief convertG4ToPSString() * * \param[in] filein input tiff g4 file * \param[out] poutstr PS string * \param[out] pnbytes number of bytes in PS string * \param[in] x, y location of LL corner of image, in pixels, relative * to the PostScript origin (0,0) at the LL corner * of the page * \param[in] res resolution of the input image, in ppi; typ. values * are 300 and 600; use 0 for automatic determination * based on image size * \param[in] scale scaling by printer; use 0.0 or 1.0 for no scaling * \param[in] pageno page number; must start with 1; you can use 0 * if there is only one page. * \param[in] maskflag boolean: use TRUE if just painting through fg; * FALSE if painting both fg and bg. * \param[in] endpage boolean: use TRUE if this is the last image to be * added to the page; FALSE otherwise * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) Generates PS string in G4 compressed tiff format from G4 tiff file. * (2) For usage, see convertG4ToPS(). * </pre> */ static l_ok convertG4ToPSString(const char *filein, char **poutstr, l_int32 *pnbytes, l_int32 x, l_int32 y, l_int32 res, l_float32 scale, l_int32 pageno, l_int32 maskflag, l_int32 endpage) { char *outstr; l_float32 xpt, ypt, wpt, hpt; L_COMP_DATA *cid; if (!poutstr) return ERROR_INT("&outstr not defined", __func__, 1); if (!pnbytes) return ERROR_INT("&nbytes not defined", __func__, 1); *poutstr = NULL; *pnbytes = 0; if (!filein) return ERROR_INT("filein not defined", __func__, 1); if ((cid = l_generateG4Data(filein, 1)) == NULL) return ERROR_INT("g4 data not made", __func__, 1); /* Get scaled location in pts. Guess the input scan resolution * based on the input parameter %res, the resolution data in * the pix, and the size of the image. */ if (scale == 0.0) scale = 1.0; if (res <= 0) { if (cid->res > 0) { res = cid->res; } else { if (cid->h <= 3509) /* A4 height at 300 ppi */ res = 300; else res = 600; } } xpt = scale * x * 72.f / res; ypt = scale * y * 72.f / res; wpt = scale * cid->w * 72.f / res; hpt = scale * cid->h * 72.f / res; if (pageno == 0) pageno = 1; #if DEBUG_G4 lept_stderr("w = %d, h = %d, minisblack = %d\n", cid->w, cid->h, cid->minisblack); lept_stderr("comp bytes = %ld, nbytes85 = %ld\n", (unsigned long)cid->nbytescomp, (unsigned long)cid->nbytes85); lept_stderr("xpt = %7.2f, ypt = %7.2f, wpt = %7.2f, hpt = %7.2f\n", xpt, ypt, wpt, hpt); #endif /* DEBUG_G4 */ /* Generate the PS */ outstr = generateG4PS(NULL, cid, xpt, ypt, wpt, hpt, maskflag, pageno, endpage); l_CIDataDestroy(&cid); if (!outstr) return ERROR_INT("outstr not made", __func__, 1); *poutstr = outstr; *pnbytes = strlen(outstr); return 0; } /*! * \brief generateG4PS() * * \param[in] filein [optional] input tiff g4 file; can be null * \param[in] cid g4 compressed image data * \param[in] xpt, ypt location of LL corner of image, in pts, relative * to the PostScript origin (0,0) at the LL corner * of the page * \param[in] wpt, hpt rendered image size in pts * \param[in] maskflag boolean: use TRUE if just painting through fg; * FALSE if painting both fg and bg. * \param[in] pageno page number; must start with 1; you can use 0 * if there is only one page. * \param[in] endpage boolean: use TRUE if this is the last image to be * added to the page; FALSE otherwise * \return PS string, or NULL on error * * <pre> * Notes: * (1) Low-level function. * </pre> */ static char * generateG4PS(const char *filein, L_COMP_DATA *cid, l_float32 xpt, l_float32 ypt, l_float32 wpt, l_float32 hpt, l_int32 maskflag, l_int32 pageno, l_int32 endpage) { l_int32 w, h; char *outstr; char bigbuf[Bufsize]; SARRAY *sa; if (!cid) return (char *)ERROR_PTR("g4 data not defined", __func__, NULL); w = cid->w; h = cid->h; sa = sarrayCreate(50); sarrayAddString(sa, "%!PS-Adobe-3.0", L_COPY); sarrayAddString(sa, "%%Creator: leptonica", L_COPY); if (filein) snprintf(bigbuf, sizeof(bigbuf), "%%%%Title: %s", filein); else snprintf(bigbuf, sizeof(bigbuf), "%%%%Title: G4 compressed PS"); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, "%%DocumentData: Clean7Bit", L_COPY); if (var_PS_WRITE_BOUNDING_BOX == 1) { snprintf(bigbuf, sizeof(bigbuf), "%%%%BoundingBox: %7.2f %7.2f %7.2f %7.2f", xpt, ypt, xpt + wpt, ypt + hpt); sarrayAddString(sa, bigbuf, L_COPY); } sarrayAddString(sa, "%%LanguageLevel: 2", L_COPY); sarrayAddString(sa, "%%EndComments", L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%%%%Page: %d %d", pageno, pageno); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, "save", L_COPY); sarrayAddString(sa, "100 dict begin", L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%7.2f %7.2f translate %%set image origin in pts", xpt, ypt); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%7.2f %7.2f scale %%set image size in pts", wpt, hpt); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, "/DeviceGray setcolorspace", L_COPY); sarrayAddString(sa, "{", L_COPY); sarrayAddString(sa, " /RawData currentfile /ASCII85Decode filter def", L_COPY); sarrayAddString(sa, " << ", L_COPY); sarrayAddString(sa, " /ImageType 1", L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /Width %d", w); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /Height %d", h); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /ImageMatrix [ %d 0 0 %d 0 %d ]", w, -h, h); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, " /BitsPerComponent 1", L_COPY); sarrayAddString(sa, " /Interpolate true", L_COPY); if (cid->minisblack) sarrayAddString(sa, " /Decode [1 0]", L_COPY); else /* miniswhite; typical for 1 bpp */ sarrayAddString(sa, " /Decode [0 1]", L_COPY); sarrayAddString(sa, " /DataSource RawData", L_COPY); sarrayAddString(sa, " <<", L_COPY); sarrayAddString(sa, " /K -1", L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /Columns %d", w); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /Rows %d", h); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, " >> /CCITTFaxDecode filter", L_COPY); if (maskflag == TRUE) /* just paint through the fg */ sarrayAddString(sa, " >> imagemask", L_COPY); else /* Paint full image */ sarrayAddString(sa, " >> image", L_COPY); sarrayAddString(sa, " RawData flushfile", L_COPY); if (endpage == TRUE) sarrayAddString(sa, " showpage", L_COPY); sarrayAddString(sa, "}", L_COPY); sarrayAddString(sa, "%%BeginData:", L_COPY); sarrayAddString(sa, "exec", L_COPY); /* Insert the ascii85 ccittg4 data; this is now owned by sa */ sarrayAddString(sa, cid->data85, L_INSERT); /* Concat the trailing data */ sarrayAddString(sa, "%%EndData", L_COPY); sarrayAddString(sa, "end", L_COPY); sarrayAddString(sa, "restore", L_COPY); outstr = sarrayToString(sa, 1); sarrayDestroy(&sa); cid->data85 = NULL; /* it has been transferred and destroyed */ return outstr; } /*-------------------------------------------------------------* * For tiff multipage files * *-------------------------------------------------------------*/ /*! * \brief convertTiffMultipageToPS() * * \param[in] filein input tiff multipage file * \param[in] fileout output ps file * \param[in] fillfract factor for filling 8.5 x 11 inch page; * use 0.0 for DefaultFillFraction * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) This converts a multipage tiff file of binary page images * into a ccitt g4 compressed PS file. * (2) If the images are generated from a standard resolution fax, * the vertical resolution is doubled to give a normal-looking * aspect ratio. * </pre> */ l_ok convertTiffMultipageToPS(const char *filein, const char *fileout, l_float32 fillfract) { char *tempfile; l_int32 i, npages, w, h, istiff; l_float32 scale; PIX *pix, *pixs; FILE *fp; if (!filein) return ERROR_INT("filein not defined", __func__, 1); if (!fileout) return ERROR_INT("fileout not defined", __func__, 1); if ((fp = fopenReadStream(filein)) == NULL) return ERROR_INT_1("file not found", filein, __func__, 1); istiff = fileFormatIsTiff(fp); if (!istiff) { fclose(fp); return ERROR_INT_1("file not tiff format", filein, __func__, 1); } tiffGetCount(fp, &npages); fclose(fp); if (fillfract == 0.0) fillfract = DefaultFillFraction; for (i = 0; i < npages; i++) { if ((pix = pixReadTiff(filein, i)) == NULL) return ERROR_INT_1("pix not made", filein, __func__, 1); pixGetDimensions(pix, &w, &h, NULL); if (w == 1728 && h < w) /* it's a std res fax */ pixs = pixScale(pix, 1.0, 2.0); else pixs = pixClone(pix); tempfile = l_makeTempFilename(); pixWrite(tempfile, pixs, IFF_TIFF_G4); scale = L_MIN(fillfract * 2550 / w, fillfract * 3300 / h); if (i == 0) convertG4ToPS(tempfile, fileout, "w", 0, 0, 300, scale, i + 1, FALSE, TRUE); else convertG4ToPS(tempfile, fileout, "a", 0, 0, 300, scale, i + 1, FALSE, TRUE); lept_rmfile(tempfile); LEPT_FREE(tempfile); pixDestroy(&pix); pixDestroy(&pixs); } return 0; } /*---------------------------------------------------------------------* * For flate (gzip) compressed images (e.g., png) * *---------------------------------------------------------------------*/ /*! * \brief convertFlateToPSEmbed() * * \param[in] filein input file -- any format * \param[in] fileout output ps file * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) This function takes any image file as input and generates a * flate-compressed, ascii85 encoded PS file, with a bounding box. * (2) The bounding box is required when a program such as TeX * (through epsf) places and rescales the image. * (3) The bounding box is sized for fitting the image to an * 8.5 x 11.0 inch page. * </pre> */ l_ok convertFlateToPSEmbed(const char *filein, const char *fileout) { char *outstr; l_int32 w, h, nbytes, ret; l_float32 xpt, ypt, wpt, hpt; L_COMP_DATA *cid; if (!filein) return ERROR_INT("filein not defined", __func__, 1); if (!fileout) return ERROR_INT("fileout not defined", __func__, 1); if ((cid = l_generateFlateData(filein, 1)) == NULL) return ERROR_INT("flate data not made", __func__, 1); w = cid->w; h = cid->h; /* Scale for 20 pt boundary and otherwise full filling * in one direction on 8.5 x 11 inch device */ xpt = 20.0; ypt = 20.0; if (w * 11.0 > h * 8.5) { wpt = 572.0; /* 612 - 2 * 20 */ hpt = wpt * (l_float32)h / (l_float32)w; } else { hpt = 752.0; /* 792 - 2 * 20 */ wpt = hpt * (l_float32)w / (l_float32)h; } /* Generate the PS. * The bounding box information should be inserted (default). */ outstr = generateFlatePS(NULL, cid, xpt, ypt, wpt, hpt, 1, 1); l_CIDataDestroy(&cid); if (!outstr) return ERROR_INT("outstr not made", __func__, 1); nbytes = strlen(outstr); ret = l_binaryWrite(fileout, "w", outstr, nbytes); LEPT_FREE(outstr); if (ret) L_ERROR("ps string not written to file\n", __func__); return ret; } /*! * \brief convertFlateToPS() * * \param[in] filein input file -- any format * \param[in] fileout output ps file * \param[in] operation "w" for write; "a" for append * \param[in] x, y location of LL corner of image, in pixels, relative * to the PostScript origin (0,0) at the LL corner * of the page * \param[in] res resolution of the input image, in ppi; * use 0 for default * \param[in] scale scaling by printer; use 0.0 or 1.0 for no scaling * \param[in] pageno page number; must start with 1; you can use 0 * if there is only one page. * \param[in] endpage boolean: use TRUE if this is the last image to be * added to the page; FALSE otherwise * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) This outputs level 3 PS as flate compressed (overlaid * with ascii85 encoding). * (2) An output file can contain multiple pages, each with * multiple images. The arguments to convertFlateToPS() * allow you to control placement of png images on multiple * pages within a PostScript file. * (3) For the first image written to a file, use "w", which * opens for write and clears the file. For all subsequent * images written to that file, use "a". * (4) The (x, y) parameters give the LL corner of the image * relative to the LL corner of the page. They are in * units of pixels if scale = 1.0. If you use (e.g.) * scale = 2.0, the image is placed at (2x, 2y) on the page, * and the image dimensions are also doubled. * (5) Display vs printed resolution: * * If your display is 75 ppi and your image was created * at a resolution of 300 ppi, you can get the image * to print at the same size as it appears on your display * by either setting scale = 4.0 or by setting res = 75. * Both tell the printer to make a 4x enlarged image. * * If your image is generated at 150 ppi and you use scale = 1, * it will be rendered such that 150 pixels correspond * to 72 pts (1 inch on the printer). This function does * the conversion from pixels (with or without scaling) to * pts, which are the units that the printer uses. * * The printer will choose its own resolution to use * in rendering the image, which will not affect the size * of the rendered image. That is because the output * PostScript file describes the geometry in terms of pts, * which are defined to be 1/72 inch. The printer will * only see the size of the image in pts, through the * scale and translate parameters and the affine * transform (the ImageMatrix) of the image. * (6) To render multiple images on the same page, set * endpage = FALSE for each image until you get to the * last, for which you set endpage = TRUE. This causes the * "showpage" command to be invoked. Showpage outputs * the entire page and clears the raster buffer for the * next page to be added. Without a "showpage", * subsequent images from the next page will overlay those * previously put down. * (7) For multiple pages, increment the page number, starting * with page 1. This allows PostScript (and PDF) to build * a page directory, which viewers use for navigation. * </pre> */ l_ok convertFlateToPS(const char *filein, const char *fileout, const char *operation, l_int32 x, l_int32 y, l_int32 res, l_float32 scale, l_int32 pageno, l_int32 endpage) { char *outstr; l_int32 nbytes, ret; if (!filein) return ERROR_INT("filein not defined", __func__, 1); if (!fileout) return ERROR_INT("fileout not defined", __func__, 1); if (strcmp(operation, "w") && strcmp(operation, "a")) return ERROR_INT("operation must be \"w\" or \"a\"", __func__, 1); if (convertFlateToPSString(filein, &outstr, &nbytes, x, y, res, scale, pageno, endpage)) return ERROR_INT("ps string not made", __func__, 1); ret = l_binaryWrite(fileout, operation, outstr, nbytes); LEPT_FREE(outstr); if (ret) L_ERROR("ps string not written to file\n", __func__); return ret; } /*! * \brief convertFlateToPSString() * * Generates level 3 PS string in flate compressed format. * * \param[in] filein input image file * \param[out] poutstr PS string * \param[out] pnbytes number of bytes in PS string * \param[in] x, y location of LL corner of image, in pixels, relative * to the PostScript origin (0,0) at the LL corner * of the page * \param[in] res resolution of the input image, in ppi; * use 0 for default * \param[in] scale scaling by printer; use 0.0 or 1.0 for no scaling * \param[in] pageno page number; must start with 1; you can use 0 * if there is only one page. * \param[in] endpage boolean: use TRUE if this is the last image to be * added to the page; FALSE otherwise * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) The returned PS character array is a null-terminated * ascii string. All the raster data is ascii85 encoded, so * there are no null bytes embedded in it. * (2) The raster encoding is made with gzip, the same as that * in a png file that is compressed without prediction. * The raster data itself is 25% larger than that in the * binary form, due to the ascii85 encoding. * * Usage: See convertFlateToPS() * </pre> */ static l_ok convertFlateToPSString(const char *filein, char **poutstr, l_int32 *pnbytes, l_int32 x, l_int32 y, l_int32 res, l_float32 scale, l_int32 pageno, l_int32 endpage) { char *outstr; l_float32 xpt, ypt, wpt, hpt; L_COMP_DATA *cid; if (!poutstr) return ERROR_INT("&outstr not defined", __func__, 1); if (!pnbytes) return ERROR_INT("&nbytes not defined", __func__, 1); *pnbytes = 0; *poutstr = NULL; if (!filein) return ERROR_INT("filein not defined", __func__, 1); if ((cid = l_generateFlateData(filein, 1)) == NULL) return ERROR_INT("flate data not made", __func__, 1); /* Get scaled location in pts. Guess the input scan resolution * based on the input parameter %res, the resolution data in * the pix, and the size of the image. */ if (scale == 0.0) scale = 1.0; if (res <= 0) { if (cid->res > 0) res = cid->res; else res = DefaultInputRes; } xpt = scale * x * 72.f / res; ypt = scale * y * 72.f / res; wpt = scale * cid->w * 72.f / res; hpt = scale * cid->h * 72.f / res; if (pageno == 0) pageno = 1; #if DEBUG_FLATE lept_stderr("w = %d, h = %d, bps = %d, spp = %d\n", cid->w, cid->h, cid->bps, cid->spp); lept_stderr("uncomp bytes = %ld, comp bytes = %ld, nbytes85 = %ld\n", (unsigned long)cid->nbytes, (unsigned long)cid->nbytescomp, (unsigned long)cid->nbytes85); lept_stderr("xpt = %7.2f, ypt = %7.2f, wpt = %7.2f, hpt = %7.2f\n", xpt, ypt, wpt, hpt); #endif /* DEBUG_FLATE */ /* Generate the PS */ outstr = generateFlatePS(NULL, cid, xpt, ypt, wpt, hpt, pageno, endpage); l_CIDataDestroy(&cid); if (!outstr) return ERROR_INT("outstr not made", __func__, 1); *poutstr = outstr; *pnbytes = strlen(outstr); return 0; } /*! * \brief generateFlatePS() * * \param[in] filein [optional] input filename; can be null * \param[in] cid flate compressed image data * \param[in] xpt, ypt location of LL corner of image, in pts, relative * to the PostScript origin (0,0) at the LL corner * of the page * \param[in] wpt, hpt rendered image size in pts * \param[in] pageno page number; must start with 1; you can use 0 * if there is only one page * \param[in] endpage boolean: use TRUE if this is the last image to be * added to the page; FALSE otherwise * \return PS string, or NULL on error */ static char * generateFlatePS(const char *filein, L_COMP_DATA *cid, l_float32 xpt, l_float32 ypt, l_float32 wpt, l_float32 hpt, l_int32 pageno, l_int32 endpage) { l_int32 w, h, bps, spp; char *outstr; char bigbuf[Bufsize]; SARRAY *sa; if (!cid) return (char *)ERROR_PTR("flate data not defined", __func__, NULL); w = cid->w; h = cid->h; bps = cid->bps; spp = cid->spp; sa = sarrayCreate(50); sarrayAddString(sa, "%!PS-Adobe-3.0 EPSF-3.0", L_COPY); sarrayAddString(sa, "%%Creator: leptonica", L_COPY); if (filein) snprintf(bigbuf, sizeof(bigbuf), "%%%%Title: %s", filein); else snprintf(bigbuf, sizeof(bigbuf), "%%%%Title: Flate compressed PS"); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, "%%DocumentData: Clean7Bit", L_COPY); if (var_PS_WRITE_BOUNDING_BOX == 1) { snprintf(bigbuf, sizeof(bigbuf), "%%%%BoundingBox: %7.2f %7.2f %7.2f %7.2f", xpt, ypt, xpt + wpt, ypt + hpt); sarrayAddString(sa, bigbuf, L_COPY); } sarrayAddString(sa, "%%LanguageLevel: 3", L_COPY); sarrayAddString(sa, "%%EndComments", L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%%%%Page: %d %d", pageno, pageno); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, "save", L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%7.2f %7.2f translate %%set image origin in pts", xpt, ypt); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), "%7.2f %7.2f scale %%set image size in pts", wpt, hpt); sarrayAddString(sa, bigbuf, L_COPY); /* If there is a colormap, add the data; it is now owned by sa */ if (cid->cmapdata85) { snprintf(bigbuf, sizeof(bigbuf), "[ /Indexed /DeviceRGB %d %%set colormap type/size", cid->ncolors - 1); sarrayAddString(sa, bigbuf, L_COPY); sarrayAddString(sa, " <~", L_COPY); sarrayAddString(sa, cid->cmapdata85, L_INSERT); sarrayAddString(sa, " ] setcolorspace", L_COPY); } else if (spp == 1) { sarrayAddString(sa, "/DeviceGray setcolorspace", L_COPY); } else { /* spp == 3 */ sarrayAddString(sa, "/DeviceRGB setcolorspace", L_COPY); } sarrayAddString(sa, "/RawData currentfile /ASCII85Decode filter def", L_COPY); sarrayAddString(sa, "/Data RawData << >> /FlateDecode filter def", L_COPY); sarrayAddString(sa, "{ << /ImageType 1", L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /Width %d", w); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /Height %d", h); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /BitsPerComponent %d", bps); sarrayAddString(sa, bigbuf, L_COPY); snprintf(bigbuf, sizeof(bigbuf), " /ImageMatrix [ %d 0 0 %d 0 %d ]", w, -h, h); sarrayAddString(sa, bigbuf, L_COPY); if (cid->cmapdata85) { sarrayAddString(sa, " /Decode [0 255]", L_COPY); } else if (spp == 1) { if (bps == 1) /* miniswhite photometry */ sarrayAddString(sa, " /Decode [1 0]", L_COPY); else /* bps > 1 */ sarrayAddString(sa, " /Decode [0 1]", L_COPY); } else { /* spp == 3 */ sarrayAddString(sa, " /Decode [0 1 0 1 0 1]", L_COPY); } sarrayAddString(sa, " /DataSource Data", L_COPY); sarrayAddString(sa, " >> image", L_COPY); sarrayAddString(sa, " Data closefile", L_COPY); sarrayAddString(sa, " RawData flushfile", L_COPY); if (endpage == TRUE) sarrayAddString(sa, " showpage", L_COPY); sarrayAddString(sa, " restore", L_COPY); sarrayAddString(sa, "} exec", L_COPY); /* Insert the ascii85 gzipped data; this is now owned by sa */ sarrayAddString(sa, cid->data85, L_INSERT); /* Generate and return the output string */ outstr = sarrayToString(sa, 1); sarrayDestroy(&sa); cid->cmapdata85 = NULL; /* it has been transferred to sa and destroyed */ cid->data85 = NULL; /* it has been transferred to sa and destroyed */ return outstr; } /*---------------------------------------------------------------------* * Write to memory * *---------------------------------------------------------------------*/ /*! * \brief pixWriteMemPS() * * \param[out] pdata data of tiff compressed image * \param[out] psize size of returned data * \param[in] pix * \param[in] box [optional] * \param[in] res can use 0 for default of 300 ppi * \param[in] scale to prevent scaling, use either 1.0 or 0.0 * \return 0 if OK, 1 on error * * <pre> * Notes: * (1) See pixWriteStringPS() for usage. * (2) This is just a wrapper for pixWriteStringPS(), which * writes uncompressed image data to memory. * </pre> */ l_ok pixWriteMemPS(l_uint8 **pdata, size_t *psize, PIX *pix, BOX *box, l_int32 res, l_float32 scale) { if (!pdata) return ERROR_INT("&data not defined", __func__, 1 ); if (!psize) return ERROR_INT("&size not defined", __func__, 1 ); if (!pix) return ERROR_INT("&pix not defined", __func__, 1 ); *pdata = (l_uint8 *)pixWriteStringPS(pix, box, res, scale); *psize = strlen((char *)(*pdata)); return 0; } /*-------------------------------------------------------------* * Converting resolution * *-------------------------------------------------------------*/ /*! * \brief getResLetterPage() * * \param[in] w image width, pixels * \param[in] h image height, pixels * \param[in] fillfract fraction in linear dimension of full page, * not to be exceeded; use 0 for default * \return resolution */ l_int32 getResLetterPage(l_int32 w, l_int32 h, l_float32 fillfract) { l_int32 resw, resh, res; if (fillfract == 0.0) fillfract = DefaultFillFraction; resw = (l_int32)((w * 72.) / (LetterWidth * fillfract)); resh = (l_int32)((h * 72.) / (LetterHeight * fillfract)); res = L_MAX(resw, resh); return res; } /*! * \brief getResA4Page() * * \param[in] w image width, pixels * \param[in] h image height, pixels * \param[in] fillfract fraction in linear dimension of full page, * not to be exceeded; use 0 for default * \return resolution */ l_int32 getResA4Page(l_int32 w, l_int32 h, l_float32 fillfract) { l_int32 resw, resh, res; if (fillfract == 0.0) fillfract = DefaultFillFraction; resw = (l_int32)((w * 72.) / (A4Width * fillfract)); resh = (l_int32)((h * 72.) / (A4Height * fillfract)); res = L_MAX(resw, resh); return res; } /*-------------------------------------------------------------* * Setting flag for writing bounding box hint * *-------------------------------------------------------------*/ void l_psWriteBoundingBox(l_int32 flag) { var_PS_WRITE_BOUNDING_BOX = flag; } /* --------------------------------------------*/ #endif /* USE_PSIO */ /* --------------------------------------------*/