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ultimatepp/bazaar/PixRaster/lib/psio2.c
micio a74e1468c9 PixRaster : updated Leptonica library to version 1.65 
git-svn-id: svn://ultimatepp.org/upp/trunk@2598 f0d560ea-af0d-0410-9eb7-867de7ffcac7
2010-08-07 23:38:03 +00:00

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/*====================================================================*
- Copyright (C) 2001 Leptonica. All rights reserved.
- This software is distributed in the hope that it will be
- useful, but with NO WARRANTY OF ANY KIND.
- No author or distributor accepts responsibility to anyone for the
- consequences of using this software, or for whether it serves any
- particular purpose or works at all, unless he or she says so in
- writing. Everyone is granted permission to copy, modify and
- redistribute this source code, for commercial or non-commercial
- purposes, with the following restrictions: (1) the origin of this
- source code must not be misrepresented; (2) modified versions must
- be plainly marked as such; and (3) this notice may not be removed
- or altered from any source or modified source distribution.
*====================================================================*/
/*
* psio2.c
*
* |=============================================================|
* | Important note |
* |=============================================================|
* |Some of these functions require libtiff and libjpeg. |
* |If you do not have both of these libraries, you must set |
* | #define USE_PSIO 0 |
* |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()
* void getScaledParametersPS()
* l_int32 convertByteToHexAscii()
*
* For jpeg compressed images (use dct compression)
* l_int32 convertJpegToPSEmbed()
* l_int32 convertJpegToPS()
* l_int32 convertJpegToPSString()
* char *generateJpegPS()
*
* For tiff g4 compressed images (use ccittg4 compression)
* l_int32 convertTiffG4ToPSEmbed()
* l_int32 convertTiffG4ToPS()
* l_int32 convertTiffG4ToPSString()
* char *generateTiffG4PS()
*
* For multipage tiff images
* l_int32 convertTiffMultipageToPS()
*
* For flate (gzip) compressed images (e.g., png)
* l_int32 convertFlateToPSEmbed()
* l_int32 convertFlateToPS()
* l_int32 convertFlateToPSString()
* char *generateFlatePS()
*
* Write to memory
* l_int32 pixWriteMemPS()
*
* Converting resolution
* l_int32 getResLetterPage()
* l_int32 getResA4Page()
*
* Utility for encoding and decoding data with ascii85
* char *encodeAscii85()
* l_int32 *convertChunkToAscii85()
* l_uint8 *decodeAscii85()
*
* See psio1.c for higher-level functions and their usage.
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "allheaders.h"
/* --------------------------------------------*/
#if USE_PSIO /* defined in environ.h */
/* --------------------------------------------*/
/* MS VC++ can't handle array initialization with static consts ! */
#define L_BUF_SIZE 512
static const l_int32 DEFAULT_PRINTER_RES = 300; /* default printing ppi */
static const l_int32 MIN_RES = 5;
static const l_int32 MAX_RES = 3000;
static const l_int32 MAX_85_LINE_COUNT = 64;
/* For computing resolution that fills page to desired amount */
static const l_int32 LETTER_WIDTH = 612; /* points */
static const l_int32 LETTER_HEIGHT = 792; /* points */
static const l_int32 A4_WIDTH = 595; /* points */
static const l_int32 A4_HEIGHT = 842; /* points */
static const l_float32 DEFAULT_FILL_FRACTION = 0.95;
static const l_uint32 power85[5] = {1,
85,
85 * 85,
85 * 85 * 85,
85 * 85 * 85 * 85};
#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. */
/*-------------------------------------------------------------*
* For uncompressed images *
*-------------------------------------------------------------*/
/*!
* pixWritePSEmbed()
*
* Input: filein (input file, all depths, colormap OK)
* fileout (output ps file)
* Return: 0 if OK, 1 on error
*
* 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.
*/
l_int32
pixWritePSEmbed(const char *filein,
const char *fileout)
{
l_int32 w, h;
l_float32 scale;
FILE *fp;
PIX *pix;
PROCNAME("pixWritePSEmbed");
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
if ((pix = pixRead(filein)) == NULL)
return ERROR_INT("image not read from file", procName, 1);
w = pixGetWidth(pix);
h = pixGetHeight(pix);
if (w * 11.0 > h * 8.5)
scale = 8.5 * 300. / (l_float32)w;
else
scale = 11.0 * 300. / (l_float32)h;
if ((fp = fopen(fileout, "w")) == NULL)
return ERROR_INT("file not opened for write", procName, 1);
pixWriteStreamPS(fp, pix, NULL, 0, scale);
fclose(fp);
pixDestroy(&pix);
return 0;
}
/*!
* pixWriteStreamPS()
*
* Input: stream
* pix
* box (<optional>)
* res (can use 0 for default of 300 ppi)
* scale (to prevent scaling, use either 1.0 or 0.0)
* Return: 0 if OK; 1 on error
*
* 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().
*/
l_int32
pixWriteStreamPS(FILE *fp,
PIX *pix,
BOX *box,
l_int32 res,
l_float32 scale)
{
char *outstr;
l_int32 length;
PIX *pixc;
PROCNAME("pixWriteStreamPS");
if (!fp)
return (l_int32)ERROR_INT("stream not open", procName, 1);
if (!pix)
return (l_int32)ERROR_INT("pix not defined", procName, 1);
if ((pixc = pixConvertForPSWrap(pix)) == NULL)
return (l_int32)ERROR_INT("pixc not made", procName, 1);
outstr = pixWriteStringPS(pixc, box, res, scale);
length = strlen(outstr);
fwrite(outstr, 1, length, fp);
FREE(outstr);
pixDestroy(&pixc);
return 0;
}
/*!
* pixWriteStringPS()
*
* Input: pixs: all depths, colormap OK
* box: (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.
* res: resolution, in printer ppi. Use 0 for default (300 ppi).
* 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
*
* 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)
*/
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;
PROCNAME("pixWriteStringPS");
if (!pixs)
return (char *)ERROR_PTR("pixs not defined", procName, NULL);
if ((pix = pixConvertForPSWrap(pixs)) == NULL)
return (char *)ERROR_PTR("pix not made", procName, 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 *)CALLOC(hexbytes + 1, sizeof(char))) == NULL)
return (char *)ERROR_PTR("hexdata not made", procName, 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);
if (!outstr)
return (char *)ERROR_PTR("outstr not made", procName, NULL);
pixDestroy(&pix);
return outstr;
}
/*!
* generateUncompressedPS()
*
* Input: hexdata
* w, h (raster image size in pixels)
* d (image depth in bpp; rgb is 32)
* psbpl (raster bytes/line, when packed to the byte boundary)
* bps (bits/sample: either 1 or 8)
* xpt, ypt (location of LL corner of image, in pts, relative
* to the PostScript origin (0,0) at the LL corner
* of the page)
* wpt, hpt (rendered image size in pts)
* boxflag (1 to print out bounding box hint; 0 to skip)
* Return: PS string, or null on error
*
* Notes:
* (1) Low-level function.
*/
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[L_BUF_SIZE];
SARRAY *sa;
PROCNAME("generateUncompressedPS");
if (!hexdata)
return (char *)ERROR_PTR("hexdata not defined", procName, NULL);
if ((sa = sarrayCreate(0)) == NULL)
return (char *)ERROR_PTR("sa not made", procName, NULL);
sarrayAddString(sa, (char *)"%!Adobe-PS", L_COPY);
if (boxflag == 0) {
sprintf(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, (char *)"gsave", L_COPY);
if (d == 1)
sarrayAddString(sa,
(char *)"{1 exch sub} settransfer %invert binary", L_COPY);
sprintf(bigbuf, "/bpl %d string def %%bpl as a string", psbpl);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf,
"%7.2f %7.2f translate %%set image origin in pts", xpt, ypt);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf,
"%7.2f %7.2f scale %%set image size in pts", wpt, hpt);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf,
"%d %d %d %%image dimensions in pixels", w, h, bps);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(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,
(char *)"{currentfile bpl readhexstring pop} image", L_COPY);
else /* d == 32 */
sarrayAddString(sa,
(char *)"{currentfile bpl readhexstring pop} false 3 colorimage",
L_COPY);
}
else { /* boxflag == 1 */
if (d == 1 || d == 8)
sarrayAddString(sa,
(char *)"{currentfile bpl readhexstring pop} bind image", L_COPY);
else /* d == 32 */
sarrayAddString(sa,
(char *)"{currentfile bpl readhexstring pop} bind false 3 colorimage",
L_COPY);
}
sarrayAddString(sa, hexdata, L_INSERT);
if (boxflag == 0)
sarrayAddString(sa, (char *)"\nshowpage", L_COPY);
else /* boxflag == 1 */
sarrayAddString(sa, (char *)"\ngrestore", L_COPY);
if ((outstr = sarrayToString(sa, 1)) == NULL)
return (char *)ERROR_PTR("outstr not made", procName, NULL);
sarrayDestroy(&sa);
return outstr;
}
/*!
* getScaledParametersPS()
*
* Input: box (<optional> location of image in mils; with
* (x,y) being the LL corner)
* wpix (pix width in pixels)
* hpix (pix height in pixels)
* res (of printer; use 0 for default)
* scale (use 1.0 or 0.0 for no scaling)
* &xpt (location of llx in pts)
* &ypt (location of lly in pts)
* &wpt (image width in pts)
* &hpt (image height in pts)
* Return: void (no arg checking)
*
* 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.
*/
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;
PROCNAME("getScaledParametersPS");
if (res == 0)
res = DEFAULT_PRINTER_RES;
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 < MIN_RES || res > MAX_RES) {
L_WARNING_INT("res %d out of bounds; using default res; no scaling",
procName, res);
res = DEFAULT_PRINTER_RES;
fres = (l_float32)res;
}
if (!box) { /* center on page */
winch = (l_float32)wpix / fres;
hinch = (l_float32)hpix / fres;
xinch = (8.5 - winch) / 2.;
yinch = (11.0 - hinch) / 2.;
}
else {
boxGetGeometry(box, &bx, &by, &bw, &bh);
if (bw == 0)
winch = (l_float32)wpix / fres;
else
winch = (l_float32)bw / 1000.;
if (bh == 0)
hinch = (l_float32)hpix / fres;
else
hinch = (l_float32)bh / 1000.;
xinch = (l_float32)bx / 1000.;
yinch = (l_float32)by / 1000.;
}
if (xinch < 0)
L_WARNING("left edge < 0.0 inch", procName);
if (xinch + winch > 8.5)
L_WARNING("right edge > 8.5 inch", procName);
if (yinch < 0.0)
L_WARNING("bottom edge < 0.0 inch", procName);
if (yinch + hinch > 11.0)
L_WARNING("top edge > 11.0 inch", procName);
*pwpt = 72. * winch;
*phpt = 72. * hinch;
*pxpt = 72. * xinch;
*pypt = 72. * yinch;
return;
}
/*!
* convertByteToHexAscii()
*
* Input: byteval (input byte)
* &nib1, &nib2 (<return> two hex ascii characters)
* Return: void
*/
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 *
*-------------------------------------------------------------*/
/*!
* convertJpegToPSEmbed()
*
* Input: filein (input jpeg file)
* fileout (output ps file)
* Return: 0 if OK, 1 on error
*
* 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.
*/
l_int32
convertJpegToPSEmbed(const char *filein,
const char *fileout)
{
char *outstr;
char *data85; /* ascii85 encoded file */
l_uint8 *bindata; /* binary encoded jpeg data (entire file) */
l_int32 w, h, bps, spp;
l_int32 nbinbytes, nbytes85, nbytes;
l_float32 xpt, ypt, wpt, hpt;
PROCNAME("convertJpegToPSEmbed");
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
/* The returned jpeg data in memory is the entire jpeg file,
* which starts with ffd8 and ends with ffd9 */
if (extractJpegDataFromFile(filein, &bindata, &nbinbytes,
&w, &h, &bps, &spp))
return ERROR_INT("bindata not extracted from file", procName, 1);
/* Convert entire jpeg file of encoded DCT data to ascii85 */
data85 = encodeAscii85(bindata, nbinbytes, &nbytes85);
FREE(bindata);
if (!data85)
return ERROR_INT("data85 not made", procName, 1);
else
data85[nbytes85 - 1] = '\0'; /* remove the newline */
/* 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, inserting bounding box information */
outstr = generateJpegPS(filein, data85, w, h, bps, spp,
xpt, ypt, wpt, hpt, 1, 1, 1);
if (!outstr)
return ERROR_INT("outstr not made", procName, 1);
nbytes = strlen(outstr);
if (arrayWrite(fileout, "w", outstr, nbytes))
return ERROR_INT("ps string not written to file", procName, 1);
FREE(outstr);
return 0;
}
/*!
* convertJpegToPS()
*
* Input: filein (input jpeg file)
* fileout (output ps file)
* operation ("w" for write; "a" for append)
* x, y (location of LL corner of image, in pixels, relative
* to the PostScript origin (0,0) at the LL corner
* of the page)
* res (resolution of the input image, in ppi; use 0 for default)
* scale (scaling by printer; use 0.0 or 1.0 for no scaling)
* pageno (page number; must start with 1; you can use 0
* if there is only one page)
* 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
*
* 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.
*/
l_int32
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;
PROCNAME("convertJpegToPS");
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
if (strcmp(operation, "w") && strcmp(operation, "a"))
return ERROR_INT("operation must be \"w\" or \"a\"", procName, 1);
if (convertJpegToPSString(filein, &outstr, &nbytes, x, y, res, scale,
pageno, endpage))
return ERROR_INT("ps string not made", procName, 1);
if (arrayWrite(fileout, operation, outstr, nbytes))
return ERROR_INT("ps string not written to file", procName, 1);
FREE(outstr);
return 0;
}
/*!
* convertJpegToPSString()
*
* Generates PS string in jpeg format from jpeg file
*
* Input: filein (input jpeg file)
* &poutstr (<return> PS string)
* &nbytes (<return> number of bytes in PS string)
* x, y (location of LL corner of image, in pixels, relative
* to the PostScript origin (0,0) at the LL corner
* of the page)
* res (resolution of the input image, in ppi; use 0 for default)
* scale (scaling by printer; use 0.0 or 1.0 for no scaling)
* pageno (page number; must start with 1; you can use 0
* if there is only one page)
* 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
*
* Notes:
* (1) For usage, see convertJpegToPS()
*/
l_int32
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;
char *data85; /* ascii85 encoded file */
l_uint8 *bindata; /* binary encoded jpeg data (entire file) */
l_int32 w, h, bps, spp;
l_int32 nbinbytes, nbytes85;
l_float32 xpt, ypt, wpt, hpt;
PROCNAME("convertJpegToPSString");
if (!poutstr)
return ERROR_INT("&outstr not defined", procName, 1);
if (!pnbytes)
return ERROR_INT("&nbytes not defined", procName, 1);
*poutstr = NULL;
*pnbytes = 0;
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
/* The returned jpeg data in memory is the entire jpeg file,
* which starts with ffd8 and ends with ffd9 */
if (extractJpegDataFromFile(filein, &bindata, &nbinbytes,
&w, &h, &bps, &spp))
return ERROR_INT("bindata not extracted from file", procName, 1);
/* Convert entire jpeg file of encoded DCT data to ascii85 */
data85 = encodeAscii85(bindata, nbinbytes, &nbytes85);
FREE(bindata);
if (!data85)
return ERROR_INT("data85 not made", procName, 1);
else
data85[nbytes85 - 1] = '\0'; /* remove the newline */
/* Get scaled location in pts */
if (scale == 0.0)
scale = 1.0;
if (res == 0)
res = DEFAULT_PRINTER_RES;
xpt = scale * x * 72. / res;
ypt = scale * y * 72. / res;
wpt = scale * w * 72. / res;
hpt = scale * h * 72. / res;
if (pageno == 0)
pageno = 1;
#if DEBUG_JPEG
fprintf(stderr, "w = %d, h = %d, bps = %d, spp = %d\n", w, h, bps, spp);
fprintf(stderr, "nbinbytes = %d, nbytes85 = %d, ratio = %5.3f\n",
nbinbytes, nbytes85, (l_float32)nbytes85 / (l_float32)nbinbytes);
fprintf(stderr, "xpt = %7.2f, ypt = %7.2f, wpt = %7.2f, hpt = %7.2f\n",
xpt, ypt, wpt, hpt);
#endif /* DEBUG_JPEG */
/* Generate the PS, including bounding box information. */
outstr = generateJpegPS(filein, data85, w, h, bps, spp,
xpt, ypt, wpt, hpt, 1, pageno, endpage);
if (!outstr)
return ERROR_INT("outstr not made", procName, 1);
*poutstr = outstr;
*pnbytes = strlen(outstr);
return 0;
}
/*!
* generateJpegPS()
*
* Input: filein (<optional> input tiff g4 file; can be null)
* data85 (ascii85 encoded ccittg4 compressed raster data)
* w, h (raster image size in pixels)
* bps (bits/sample: usually 8)
* spp (samples/pixel: 1 (grayscale); 3 (rgb; typical), 4 (rgba))
* xpt, ypt (location of LL corner of image, in pts, relative
* to the PostScript origin (0,0) at the LL corner
* of the page)
* wpt, hpt (rendered image size in pts)
* bbflag (boolean: 1 to print b.b. info)
* pageno (page number; must start with 1; you can use 0
* if there is only one page.)
* 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
*
* Notes:
* (1) Low-level function.
*/
char *
generateJpegPS(const char *filein,
char *data85,
l_int32 w,
l_int32 h,
l_int32 bps,
l_int32 spp,
l_float32 xpt,
l_float32 ypt,
l_float32 wpt,
l_float32 hpt,
l_int32 bbflag,
l_int32 pageno,
l_int32 endpage)
{
char *outstr;
char bigbuf[L_BUF_SIZE];
SARRAY *sa;
PROCNAME("generateJpegPS");
if (!data85)
return (char *)ERROR_PTR("data85 not defined", procName, NULL);
if ((sa = sarrayCreate(50)) == NULL)
return (char *)ERROR_PTR("sa not made", procName, NULL);
sarrayAddString(sa, (char *)"%!PS-Adobe-3.0", L_COPY);
sarrayAddString(sa, (char *)"%%Creator: leptonica", L_COPY);
if (filein) {
sprintf(bigbuf, "%%%%Title: %s", filein);
sarrayAddString(sa, bigbuf, L_COPY);
}
sarrayAddString(sa, (char *)"%%DocumentData: Clean7Bit", L_COPY);
if (bbflag) {
sprintf(bigbuf,
"%%%%BoundingBox: %7.2f %7.2f %7.2f %7.2f",
xpt, ypt, xpt + wpt, ypt + hpt);
sarrayAddString(sa, bigbuf, L_COPY);
}
sarrayAddString(sa, (char *)"%%LanguageLevel: 2", L_COPY);
sarrayAddString(sa, (char *)"%%EndComments", L_COPY);
sprintf(bigbuf, "%%%%Page: %d %d", pageno, pageno);
sarrayAddString(sa, bigbuf, L_COPY);
sarrayAddString(sa, (char *)"save", L_COPY);
sarrayAddString(sa,
(char *)"/RawData currentfile /ASCII85Decode filter def", L_COPY);
sarrayAddString(sa,
(char *)"/Data RawData << >> /DCTDecode filter def", L_COPY);
sprintf(bigbuf,
"%7.2f %7.2f translate %%set image origin in pts", xpt, ypt);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf,
"%7.2f %7.2f scale %%set image size in pts", wpt, hpt);
sarrayAddString(sa, bigbuf, L_COPY);
if (spp == 1)
sarrayAddString(sa, (char *)"/DeviceGray setcolorspace", L_COPY);
else if (spp == 3)
sarrayAddString(sa, (char *)"/DeviceRGB setcolorspace", L_COPY);
else /*spp == 4 */
sarrayAddString(sa, (char *)"/DeviceCMYK setcolorspace", L_COPY);
sarrayAddString(sa, (char *)"{ << /ImageType 1", L_COPY);
sprintf(bigbuf, " /Width %d", w);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf, " /Height %d", h);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf, " /ImageMatrix [ %d 0 0 %d 0 %d ]", w, -h, h);
sarrayAddString(sa, bigbuf, L_COPY);
sarrayAddString(sa, (char *)" /DataSource Data", L_COPY);
sprintf(bigbuf, " /BitsPerComponent %d", bps);
sarrayAddString(sa, bigbuf, L_COPY);
if (spp == 1)
sarrayAddString(sa, (char *)" /Decode [0 1]", L_COPY);
else if (spp == 3)
sarrayAddString(sa, (char *)" /Decode [0 1 0 1 0 1]", L_COPY);
else /* spp == 4 */
sarrayAddString(sa, (char *)" /Decode [0 1 0 1 0 1 0 1]", L_COPY);
sarrayAddString(sa, (char *)" >> image", L_COPY);
sarrayAddString(sa, (char *)" Data closefile", L_COPY);
sarrayAddString(sa, (char *)" RawData flushfile", L_COPY);
if (endpage == TRUE)
sarrayAddString(sa, (char *)" showpage", L_COPY);
sarrayAddString(sa, (char *)" restore", L_COPY);
sarrayAddString(sa, (char *)"} exec", L_COPY);
/* Insert the ascii85 jpeg data; this is now owned by sa */
sarrayAddString(sa, data85, L_INSERT);
/* Generate and return the output string */
outstr = sarrayToString(sa, 1);
sarrayDestroy(&sa);
return outstr;
}
/*-------------------------------------------------------------*
* For tiff g4 compressed images *
*-------------------------------------------------------------*/
/*!
* convertTiffG4ToPSEmbed()
*
* Input: filein (input tiff file)
* fileout (output ps file)
* Return: 0 if OK, 1 on error
*
* 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.
*/
l_int32
convertTiffG4ToPSEmbed(const char *filein,
const char *fileout)
{
char *outstr;
char *data85; /* ascii85 encoded ccitt g4 data */
l_uint8 *bindata; /* binary encoded ccitt g4 data */
l_int32 minisblack; /* TRUE or FALSE */
l_int32 w, h;
l_int32 nbinbytes, nbytes85, nbytes;
l_float32 xpt, ypt, wpt, hpt;
PROCNAME("convertTiffG4ToPSEmbed");
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
/* The returned ccitt g4 data in memory is the block of
* bytes in the tiff file, starting after 8 bytes and
* ending before the directory. */
if (extractTiffG4DataFromFile(filein, &bindata, &nbinbytes,
&w, &h, &minisblack))
return ERROR_INT("bindata not extracted from file", procName, 1);
/* Convert the ccittg4 encoded data to ascii85 */
data85 = encodeAscii85(bindata, nbinbytes, &nbytes85);
FREE(bindata);
if (!data85)
return ERROR_INT("data85 not made", procName, 1);
else
data85[nbytes85 - 1] = '\0'; /* remove the newline */
/* 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, inserting bounding box information and
* painting through the image mask. */
outstr = generateTiffG4PS(filein, data85, w, h, xpt, ypt, wpt, hpt,
1, minisblack, 1, 1, 1);
if (!outstr)
return ERROR_INT("outstr not made", procName, 1);
nbytes = strlen(outstr);
if (arrayWrite(fileout, "w", outstr, nbytes))
return ERROR_INT("ps string not written to file", procName, 1);
FREE(outstr);
return 0;
}
/*!
* convertTiffG4ToPS()
*
* Input: filein (input tiff g4 file)
* fileout (output ps file)
* operation ("w" for write; "a" for append)
* x, y (location of LL corner of image, in pixels, relative
* to the PostScript origin (0,0) at the LL corner
* of the page)
* res (resolution of the input image, in ppi; typ. values
* are 300 and 600; use 0 for automatic determination
* based on image size)
* scale (scaling by printer; use 0.0 or 1.0 for no scaling)
* pageno (page number; must start with 1; you can use 0
* if there is only one page.)
* maskflag (boolean: use TRUE if just painting through fg;
* FALSE if painting both fg and bg.
* 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
*
* 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.
*/
l_int32
convertTiffG4ToPS(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;
PROCNAME("convertTiffG4ToPS");
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
if (strcmp(operation, "w") && strcmp(operation, "a"))
return ERROR_INT("operation must be \"w\" or \"a\"", procName, 1);
if (convertTiffG4ToPSString(filein, &outstr, &nbytes, x, y, res, scale,
pageno, maskflag, endpage))
return ERROR_INT("ps string not made", procName, 1);
if (arrayWrite(fileout, operation, outstr, nbytes))
return ERROR_INT("ps string not written to file", procName, 1);
FREE(outstr);
return 0;
}
/*!
* convertTiffG4ToPSString()
*
* Input: filein (input tiff g4 file)
* &poutstr (<return> PS string)
* &nbytes (<return> number of bytes in PS string)
* x, y (location of LL corner of image, in pixels, relative
* to the PostScript origin (0,0) at the LL corner
* of the page)
* res (resolution of the input image, in ppi; typ. values
* are 300 and 600; use 0 for automatic determination
* based on image size)
* scale (scaling by printer; use 0.0 or 1.0 for no scaling)
* pageno (page number; must start with 1; you can use 0
* if there is only one page.)
* maskflag (boolean: use TRUE if just painting through fg;
* FALSE if painting both fg and bg.
* 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
*
* Notes:
* (1) Generates PS string in G4 compressed tiff format from G4 tiff file.
* (2) For usage, see convertTiffG4ToPS().
*/
l_int32
convertTiffG4ToPSString(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;
char *data85; /* ascii85 encoded ccitt g4 data */
l_uint8 *bindata; /* binary encoded ccitt g4 data */
l_int32 minisblack; /* TRUE or FALSE */
l_int32 w, h, nbinbytes, nbytes85;
l_float32 xpt, ypt, wpt, hpt;
PROCNAME("convertTiffG4ToPSString");
if (!poutstr)
return ERROR_INT("&outstr not defined", procName, 1);
if (!pnbytes)
return ERROR_INT("&nbytes not defined", procName, 1);
*poutstr = NULL;
*pnbytes = 0;
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
/* The returned ccitt g4 data in memory is the block of
* bytes in the tiff file, starting after 8 bytes and
* ending before the directory. */
if (extractTiffG4DataFromFile(filein, &bindata, &nbinbytes,
&w, &h, &minisblack))
return ERROR_INT("bindata not extracted from file", procName, 1);
/* Convert the ccittg4 encoded data to ascii85 */
data85 = encodeAscii85(bindata, nbinbytes, &nbytes85);
FREE(bindata);
if (!data85)
return ERROR_INT("data85 not made", procName, 1);
else
data85[nbytes85 - 1] = '\0'; /* remove the newline */
/* Get scaled location in pts */
if (scale == 0.0)
scale = 1.0;
if (res == 0) {
if (h <= 3300)
res = 300;
else
res = 600;
}
xpt = scale * x * 72. / res;
ypt = scale * y * 72. / res;
wpt = scale * w * 72. / res;
hpt = scale * h * 72. / res;
if (pageno == 0)
pageno = 1;
#if DEBUG_G4
/* arrayWrite("junkarray", "w", bindata, nbinbytes); */
fprintf(stderr, "nbinbytes = %d, w = %d, h = %d, minisblack = %d\n",
nbinbytes, w, h, minisblack);
fprintf(stderr, "xpt = %7.2f, ypt = %7.2f, wpt = %7.2f, hpt = %7.2f\n",
xpt, ypt, wpt, hpt);
#endif /* DEBUG_G4 */
/* Generate the PS, including bounding box information. */
outstr = generateTiffG4PS(filein, data85, w, h, xpt, ypt, wpt, hpt,
1, minisblack, maskflag, pageno, endpage);
if (!outstr)
return ERROR_INT("outstr not made", procName, 1);
*poutstr = outstr;
*pnbytes = strlen(outstr);
return 0;
}
/*!
* generateTiffG4PS()
*
* Input: filein (<optional> input tiff g4 file; can be null)
* data85 (ascii85 encoded ccittg4 compressed raster data)
* w, h (raster image size in pixels)
* xpt, ypt (location of LL corner of image, in pts, relative
* to the PostScript origin (0,0) at the LL corner
* of the page)
* wpt, hpt (rendered image size in pts)
* bbflag (boolean: 1 to print b.b. info)
* minisblack (boolean: typ. FALSE for 1 bpp images)
* maskflag (boolean: use TRUE if just painting through fg;
* FALSE if painting both fg and bg.
* pageno (page number; must start with 1; you can use 0
* if there is only one page.)
* 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
*
* Notes:
* (1) Low-level function.
*/
char *
generateTiffG4PS(const char *filein,
char *data85,
l_int32 w,
l_int32 h,
l_float32 xpt,
l_float32 ypt,
l_float32 wpt,
l_float32 hpt,
l_int32 bbflag,
l_int32 minisblack,
l_int32 maskflag,
l_int32 pageno,
l_int32 endpage)
{
char *outstr;
char bigbuf[L_BUF_SIZE];
SARRAY *sa;
PROCNAME("generateTiffG4PS");
if (!data85)
return (char *)ERROR_PTR("data85 not defined", procName, NULL);
if ((sa = sarrayCreate(50)) == NULL)
return (char *)ERROR_PTR("sa not made", procName, NULL);
sarrayAddString(sa, (char *)"%!PS-Adobe-3.0", L_COPY);
sarrayAddString(sa, (char *)"%%Creator: leptonica", L_COPY);
if (filein) {
sprintf(bigbuf, "%%%%Title: %s", filein);
sarrayAddString(sa, bigbuf, L_COPY);
}
sarrayAddString(sa, (char *)"%%DocumentData: Clean7Bit", L_COPY);
if (bbflag) {
sprintf(bigbuf,
"%%%%BoundingBox: %7.2f %7.2f %7.2f %7.2f",
xpt, ypt, xpt + wpt, ypt + hpt);
sarrayAddString(sa, bigbuf, L_COPY);
}
sarrayAddString(sa, (char *)"%%LanguageLevel: 2", L_COPY);
sarrayAddString(sa, (char *)"%%EndComments", L_COPY);
sprintf(bigbuf, "%%%%Page: %d %d", pageno, pageno);
sarrayAddString(sa, bigbuf, L_COPY);
sarrayAddString(sa, (char *)"save", L_COPY);
sarrayAddString(sa, (char *)"100 dict begin", L_COPY);
sprintf(bigbuf,
"%7.2f %7.2f translate %%set image origin in pts", xpt, ypt);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf,
"%7.2f %7.2f scale %%set image size in pts", wpt, hpt);
sarrayAddString(sa, bigbuf, L_COPY);
sarrayAddString(sa, (char *)"/DeviceGray setcolorspace", L_COPY);
sarrayAddString(sa, (char *)"{", L_COPY);
sarrayAddString(sa,
(char *)" /RawData currentfile /ASCII85Decode filter def", L_COPY);
sarrayAddString(sa, (char *)" << ", L_COPY);
sarrayAddString(sa, (char *)" /ImageType 1", L_COPY);
sprintf(bigbuf, " /Width %d", w);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf, " /Height %d", h);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf, " /ImageMatrix [ %d 0 0 %d 0 %d ]", w, -h, h);
sarrayAddString(sa, bigbuf, L_COPY);
sarrayAddString(sa, (char *)" /BitsPerComponent 1", L_COPY);
sarrayAddString(sa, (char *)" /Interpolate true", L_COPY);
if (minisblack)
sarrayAddString(sa, (char *)" /Decode [1 0]", L_COPY);
else /* miniswhite; typical for 1 bpp */
sarrayAddString(sa, (char *)" /Decode [0 1]", L_COPY);
sarrayAddString(sa, (char *)" /DataSource RawData", L_COPY);
sarrayAddString(sa, (char *)" <<", L_COPY);
sarrayAddString(sa, (char *)" /K -1", L_COPY);
sprintf(bigbuf, " /Columns %d", w);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf, " /Rows %d", h);
sarrayAddString(sa, bigbuf, L_COPY);
sarrayAddString(sa, (char *)" >> /CCITTFaxDecode filter", L_COPY);
if (maskflag == TRUE) /* just paint through the fg */
sarrayAddString(sa, (char *)" >> imagemask", L_COPY);
else /* Paint full image */
sarrayAddString(sa, (char *)" >> image", L_COPY);
sarrayAddString(sa, (char *)" RawData flushfile", L_COPY);
if (endpage == TRUE)
sarrayAddString(sa, (char *)" showpage", L_COPY);
sarrayAddString(sa, (char *)"}", L_COPY);
sarrayAddString(sa, (char *)"%%BeginData:", L_COPY);
sarrayAddString(sa, (char *)"exec", L_COPY);
/* Insert the ascii85 jpeg data; this is now owned by sa */
sarrayAddString(sa, data85, L_INSERT);
/* Concat the trailing data */
sarrayAddString(sa, (char *)"%%EndData", L_COPY);
sarrayAddString(sa, (char *)"end", L_COPY);
sarrayAddString(sa, (char *)"restore", L_COPY);
outstr = sarrayToString(sa, 1);
sarrayDestroy(&sa);
return outstr;
}
/*-------------------------------------------------------------*
* For tiff multipage files *
*-------------------------------------------------------------*/
/*!
* convertTiffMultipageToPS()
*
* Input: filein (input tiff multipage file)
* fileout (output ps file)
* tempfile (<optional> for temporary g4 tiffs;
* use NULL for default)
* factor (for filling 8.5 x 11 inch page;
* use 0.0 for DEFAULT_FILL_FRACTION)
* Return: 0 if OK, 1 on error
*
* 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.
*/
l_int32
convertTiffMultipageToPS(const char *filein,
const char *fileout,
const char *tempfile,
l_float32 fillfract)
{
const char tempdefault[] = "/tmp/junk_temp_g4.tif";
const char *tempname;
l_int32 i, npages, w, h, istiff;
l_float32 scale;
PIX *pix, *pixs;
FILE *fp;
PROCNAME("convertTiffMultipageToPS");
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
if ((fp = fopen(filein, "rb")) == NULL)
return ERROR_INT("file not found", procName, 1);
istiff = fileFormatIsTiff(fp);
if (!istiff) {
fclose(fp);
return ERROR_INT("file not tiff format", procName, 1);
}
tiffGetCount(fp, &npages);
fclose(fp);
if (tempfile)
tempname = tempfile;
else
tempname = tempdefault;
if (fillfract == 0.0)
fillfract = DEFAULT_FILL_FRACTION;
for (i = 0; i < npages; i++) {
if ((pix = pixReadTiff(filein, i)) == NULL)
return ERROR_INT("pix not made", procName, 1);
w = pixGetWidth(pix);
h = pixGetHeight(pix);
if (w == 1728 && h < w) /* it's a std res fax */
pixs = pixScale(pix, 1.0, 2.0);
else
pixs = pixClone(pix);
pixWrite(tempname, pixs, IFF_TIFF_G4);
scale = L_MIN(fillfract * 2550 / w, fillfract * 3300 / h);
if (i == 0)
convertTiffG4ToPS(tempname, fileout, "w", 0, 0, 300, scale,
i + 1, FALSE, TRUE);
else
convertTiffG4ToPS(tempname, fileout, "a", 0, 0, 300, scale,
i + 1, FALSE, TRUE);
pixDestroy(&pix);
pixDestroy(&pixs);
}
return 0;
}
/*---------------------------------------------------------------------*
* For flate (gzip) compressed images (e.g., png) *
*---------------------------------------------------------------------*/
/*!
* convertFlateToPSEmbed()
*
* Input: filein (input file -- any format)
* fileout (output ps file)
* Return: 0 if OK, 1 on error
*
* 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.
*/
l_int32
convertFlateToPSEmbed(const char *filein,
const char *fileout)
{
char *outstr;
char *cmapdata85; /* ascii85 encoded raw colormap */
char *data85; /* ascii85 encoded file */
l_uint8 *cmapdata, *compdata, *data;
l_int32 w, h, d, bps, spp, cmapflag, ncolors;
l_int32 nbytes, nbytes85, ncompbytes, ncmapbytes, ncmapbytes85;
l_float32 xpt, ypt, wpt, hpt;
PIX *pix, *pixs;
PIXCMAP *cmap;
PROCNAME("convertFlateToPSEmbed");
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
/* Read in the image and convert to one of these 4 types:
* 1 bpp
* 8 bpp, no colormap
* 8 bpp, colormap
* 32 bpp rgb */
if ((pix = pixRead(filein)) == NULL)
return ERROR_INT("pix not read from file", procName, 1);
pixGetDimensions(pix, &w, &h, &d);
cmap = pixGetColormap(pix);
cmapflag = (cmap) ? 1 : 0;
if (d == 2 || d == 4 || d == 16) {
pixs = pixConvertTo8(pix, cmapflag);
cmap = pixGetColormap(pixs);
d = pixGetDepth(pixs);
}
else
pixs = pixClone(pix);
pixDestroy(&pix);
spp = (d == 32) ? 3 : 1;
bps = (d == 32) ? 8 : d;
/* Extract and encode the colormap data. No compression. */
cmapdata85 = NULL;
if (cmap) {
pixcmapSerializeToMemory(cmap, 3, &ncolors, &cmapdata, &ncmapbytes);
if (!cmapdata)
return ERROR_INT("cmapdata not made", procName, 1);
cmapdata85 = encodeAscii85(cmapdata, ncmapbytes, &ncmapbytes85);
FREE(cmapdata);
}
/* Extract, compress and encode the raster data */
pixGetRasterData(pixs, &data, &nbytes);
compdata = zlibCompress(data, nbytes, &ncompbytes);
if (!compdata)
return ERROR_INT("compdata not made", procName, 1);
FREE(data);
data85 = encodeAscii85(compdata, ncompbytes, &nbytes85);
FREE(compdata);
if (!data85)
return ERROR_INT("data85 not made", procName, 1);
else
data85[nbytes85 - 1] = '\0'; /* remove the newline */
pixDestroy(&pixs);
/* 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, inserting bounding box information */
outstr = generateFlatePS(filein, data85, cmapdata85, ncolors,
w, h, bps, spp, xpt, ypt, wpt, hpt, 1, 1, 1);
if (!outstr)
return ERROR_INT("outstr not made", procName, 1);
nbytes = strlen(outstr);
if (arrayWrite(fileout, "w", outstr, nbytes))
return ERROR_INT("ps string not written to file", procName, 1);
FREE(outstr);
return 0;
}
/*!
* convertFlateToPS()
*
* Input: filein (input file -- any format)
* fileout (output ps file)
* operation ("w" for write; "a" for append)
* x, y (location of LL corner of image, in pixels, relative
* to the PostScript origin (0,0) at the LL corner
* of the page)
* res (resolution of the input image, in ppi; use 0 for default)
* scale (scaling by printer; use 0.0 or 1.0 for no scaling)
* pageno (page number; must start with 1; you can use 0
* if there is only one page.)
* 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
*
* 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.
*/
l_int32
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;
PROCNAME("convertFlateToPS");
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
if (strcmp(operation, "w") && strcmp(operation, "a"))
return ERROR_INT("operation must be \"w\" or \"a\"", procName, 1);
if (convertFlateToPSString(filein, &outstr, &nbytes, x, y, res, scale,
pageno, endpage))
return ERROR_INT("ps string not made", procName, 1);
if (arrayWrite(fileout, operation, outstr, nbytes))
return ERROR_INT("ps string not written to file", procName, 1);
FREE(outstr);
return 0;
}
/*!
* convertFlateToPSString()
*
* Generates level 3 PS string in flate compressed format.
*
* Input: filein (input image file)
* &poutstr (<return> PS string)
* &nbytes (<return> number of bytes in PS string)
* x, y (location of LL corner of image, in pixels, relative
* to the PostScript origin (0,0) at the LL corner
* of the page)
* res (resolution of the input image, in ppi; use 0 for default)
* scale (scaling by printer; use 0.0 or 1.0 for no scaling)
* pageno (page number; must start with 1; you can use 0
* if there is only one page.)
* 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
*
* 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()
*/
l_int32
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;
char *cmapdata85; /* ascii85 encoded raw colormap */
char *data85; /* ascii85 encoded gzipped raster data */
l_uint8 *cmapdata, *compdata, *data;
l_int32 w, h, d, spp, bps, cmapflag, ncolors;
l_int32 nbytes, nbytes85, ncompbytes, ncmapbytes, ncmapbytes85;
l_float32 xpt, ypt, wpt, hpt;
PIX *pix, *pixs;
PIXCMAP *cmap;
PROCNAME("convertFlateToPSString");
if (!poutstr)
return ERROR_INT("&outstr not defined", procName, 1);
if (!pnbytes)
return ERROR_INT("&nbytes not defined", procName, 1);
*pnbytes = 0;
*poutstr = NULL;
if (!filein)
return ERROR_INT("filein not defined", procName, 1);
/* Read in the image and convert to one of these 4 types:
* 1 bpp
* 8 bpp, no colormap
* 8 bpp, colormap
* 32 bpp rgb */
if ((pix = pixRead(filein)) == NULL)
return ERROR_INT("pix not read from file", procName, 1);
pixGetDimensions(pix, &w, &h, &d);
cmap = pixGetColormap(pix);
cmapflag = (cmap) ? 1 : 0;
if (d == 2 || d == 4 || d == 16) {
pixs = pixConvertTo8(pix, cmapflag);
cmap = pixGetColormap(pixs);
d = pixGetDepth(pixs);
}
else
pixs = pixClone(pix);
pixDestroy(&pix);
spp = (d == 32) ? 3 : 1;
bps = (d == 32) ? 8 : d;
/* Extract and encode the colormap data. No compression. */
cmapdata85 = NULL;
if (cmap) {
pixcmapSerializeToMemory(cmap, 3, &ncolors, &cmapdata, &ncmapbytes);
if (!cmapdata)
return ERROR_INT("cmapdata not made", procName, 1);
cmapdata85 = encodeAscii85(cmapdata, ncmapbytes, &ncmapbytes85);
FREE(cmapdata);
}
/* Extract, compress and encode the raster data */
pixGetRasterData(pixs, &data, &nbytes);
compdata = zlibCompress(data, nbytes, &ncompbytes);
if (!compdata)
return ERROR_INT("compdata not made", procName, 1);
FREE(data);
data85 = encodeAscii85(compdata, ncompbytes, &nbytes85);
FREE(compdata);
if (!data85)
return ERROR_INT("data85 not made", procName, 1);
else
data85[nbytes85 - 1] = '\0'; /* remove the newline */
pixDestroy(&pixs);
/* Get scaled location in pts */
if (scale == 0.0)
scale = 1.0;
if (res == 0)
res = DEFAULT_PRINTER_RES;
xpt = scale * x * 72. / res;
ypt = scale * y * 72. / res;
wpt = scale * w * 72. / res;
hpt = scale * h * 72. / res;
if (pageno == 0)
pageno = 1;
#if DEBUG_FLATE
fprintf(stderr, "w = %d, h = %d, bps = %d, spp = %d\n", w, h, bps, spp);
fprintf(stderr, "uncomp bytes = %d, comp bytes = %d, nbytes85 = %d\n",
nbytes, ncompbytes, nbytes85);
fprintf(stderr, "xpt = %7.2f, ypt = %7.2f, wpt = %7.2f, hpt = %7.2f\n",
xpt, ypt, wpt, hpt);
#endif /* DEBUG_FLATE */
/* Generate the PS, including bounding box information. */
outstr = generateFlatePS(filein, data85, cmapdata85, ncolors,
w, h, bps, spp, xpt, ypt, wpt, hpt,
1, pageno, endpage);
if (!outstr)
return ERROR_INT("outstr not made", procName, 1);
*poutstr = outstr;
*pnbytes = strlen(outstr);
return 0;
}
/*!
* generateFlatePS()
*
* Input: filein (<optional> input tiff g4 file; can be null)
* data85 (ascii85 encoded ccittg4 compressed raster data)
* cmapdata85 (ascii85 encoded uncompressed colormap; can be null)
* ncolors (in colormap; ignored if cmapdata85 is null)
* w, h (raster image size in pixels)
* bps (bits/sample: usually 8)
* spp (samples/pixel: 1 (grayscale); 3 (rgb; typical), 4 (rgba))
* xpt, ypt (location of LL corner of image, in pts, relative
* to the PostScript origin (0,0) at the LL corner
* of the page)
* wpt, hpt (rendered image size in pts)
* bbflag (boolean: 1 to print b.b. info)
* pageno (page number; must start with 1; you can use 0
* if there is only one page)
* 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
*/
char *
generateFlatePS(const char *filein,
char *data85,
char *cmapdata85,
l_int32 ncolors,
l_int32 w,
l_int32 h,
l_int32 bps,
l_int32 spp,
l_float32 xpt,
l_float32 ypt,
l_float32 wpt,
l_float32 hpt,
l_int32 bbflag,
l_int32 pageno,
l_int32 endpage)
{
char *outstr;
char bigbuf[L_BUF_SIZE];
SARRAY *sa;
PROCNAME("generateFlatePS");
if (!data85)
return (char *)ERROR_PTR("data85 not defined", procName, NULL);
if ((sa = sarrayCreate(50)) == NULL)
return (char *)ERROR_PTR("sa not made", procName, NULL);
sarrayAddString(sa, (char *)"%!PS-Adobe-3.0 EPSF-3.0", L_COPY);
sarrayAddString(sa, (char *)"%%Creator: leptonica", L_COPY);
if (filein) {
sprintf(bigbuf, "%%%%Title: %s", filein);
sarrayAddString(sa, bigbuf, L_COPY);
}
sarrayAddString(sa, (char *)"%%DocumentData: Clean7Bit", L_COPY);
if (bbflag) {
sprintf(bigbuf,
"%%%%BoundingBox: %7.2f %7.2f %7.2f %7.2f",
xpt, ypt, xpt + wpt, ypt + hpt);
sarrayAddString(sa, bigbuf, L_COPY);
}
sarrayAddString(sa, (char *)"%%LanguageLevel: 3", L_COPY);
sarrayAddString(sa, (char *)"%%EndComments", L_COPY);
sprintf(bigbuf, "%%%%Page: %d %d", pageno, pageno);
sarrayAddString(sa, bigbuf, L_COPY);
sarrayAddString(sa, (char *)"save", L_COPY);
sprintf(bigbuf,
"%7.2f %7.2f translate %%set image origin in pts", xpt, ypt);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(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 (cmapdata85) {
sprintf(bigbuf,
"[ /Indexed /DeviceRGB %d %%set colormap type/size",
ncolors - 1);
sarrayAddString(sa, bigbuf, L_COPY);
sarrayAddString(sa, (char *)" <~", L_COPY);
sarrayAddString(sa, cmapdata85, L_INSERT);
sarrayAddString(sa, (char *)" ] setcolorspace", L_COPY);
}
else if (spp == 1)
sarrayAddString(sa, (char *)"/DeviceGray setcolorspace", L_COPY);
else /* spp == 3 */
sarrayAddString(sa, (char *)"/DeviceRGB setcolorspace", L_COPY);
sarrayAddString(sa,
(char *)"/RawData currentfile /ASCII85Decode filter def", L_COPY);
sarrayAddString(sa,
(char *)"/Data RawData << >> /FlateDecode filter def", L_COPY);
sarrayAddString(sa, (char *)"{ << /ImageType 1", L_COPY);
sprintf(bigbuf, " /Width %d", w);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf, " /Height %d", h);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf, " /BitsPerComponent %d", bps);
sarrayAddString(sa, bigbuf, L_COPY);
sprintf(bigbuf, " /ImageMatrix [ %d 0 0 %d 0 %d ]", w, -h, h);
sarrayAddString(sa, bigbuf, L_COPY);
if (cmapdata85)
sarrayAddString(sa, (char *)" /Decode [0 255]", L_COPY);
else if (spp == 1) {
if (bps == 1) /* miniswhite photometry */
sarrayAddString(sa, (char *)" /Decode [1 0]", L_COPY);
else /* bps > 1 */
sarrayAddString(sa, (char *)" /Decode [0 1]", L_COPY);
}
else /* spp == 3 */
sarrayAddString(sa, (char *)" /Decode [0 1 0 1 0 1]", L_COPY);
sarrayAddString(sa, (char *)" /DataSource Data", L_COPY);
sarrayAddString(sa, (char *)" >> image", L_COPY);
sarrayAddString(sa, (char *)" Data closefile", L_COPY);
sarrayAddString(sa, (char *)" RawData flushfile", L_COPY);
if (endpage == TRUE)
sarrayAddString(sa, (char *)" showpage", L_COPY);
sarrayAddString(sa, (char *)" restore", L_COPY);
sarrayAddString(sa, (char *)"} exec", L_COPY);
/* Insert the ascii85 jpeg data; this is now owned by sa */
sarrayAddString(sa, data85, L_INSERT);
/* Generate and return the output string */
outstr = sarrayToString(sa, 1);
sarrayDestroy(&sa);
return outstr;
}
/*---------------------------------------------------------------------*
* Write to memory *
*---------------------------------------------------------------------*/
/*!
* pixWriteMemPS()
*
* Input: &data (<return> data of tiff compressed image)
* &size (<return> size of returned data)
* pix
* box (<optional>)
* res (can use 0 for default of 300 ppi)
* scale (to prevent scaling, use either 1.0 or 0.0)
* Return: 0 if OK, 1 on error
*
* Notes:
* (1) See pixWriteStringPS() for usage.
* (2) This is just a wrapper for pixWriteStringPS(), which
* writes uncompressed image data to memory.
*/
l_int32
pixWriteMemPS(l_uint8 **pdata,
size_t *psize,
PIX *pix,
BOX *box,
l_int32 res,
l_float32 scale)
{
PROCNAME("pixWriteMemPS");
if (!pdata)
return ERROR_INT("&data not defined", procName, 1 );
if (!psize)
return ERROR_INT("&size not defined", procName, 1 );
if (!pix)
return ERROR_INT("&pix not defined", procName, 1 );
*pdata = (l_uint8 *)pixWriteStringPS(pix, box, res, scale);
*psize = strlen((char *)(*pdata));
return 0;
}
/*-------------------------------------------------------------*
* Converting resolution *
*-------------------------------------------------------------*/
/*!
* getResLetterPage()
*
* Input: w (image width, pixels)
* h (image height, pixels)
* fillfract (fraction in linear dimension of full page, not
* to be exceeded; use 0 for default)
* Return: 0 if OK, 1 on error
*/
l_int32
getResLetterPage(l_int32 w,
l_int32 h,
l_float32 fillfract)
{
l_int32 resw, resh, res;
if (fillfract == 0.0)
fillfract = DEFAULT_FILL_FRACTION;
resw = (l_int32)((w * 72.) / (LETTER_WIDTH * fillfract));
resh = (l_int32)((h * 72.) / (LETTER_HEIGHT * fillfract));
res = L_MAX(resw, resh);
return res;
}
/*!
* getResA4Page()
*
* Input: w (image width, pixels)
* h (image height, pixels)
* fillfract (fraction in linear dimension of full page, not
* to be exceeded; use 0 for default)
* Return: 0 if OK, 1 on error
*/
l_int32
getResA4Page(l_int32 w,
l_int32 h,
l_float32 fillfract)
{
l_int32 resw, resh, res;
if (fillfract == 0.0)
fillfract = DEFAULT_FILL_FRACTION;
resw = (l_int32)((w * 72.) / (A4_WIDTH * fillfract));
resh = (l_int32)((h * 72.) / (A4_HEIGHT * fillfract));
res = L_MAX(resw, resh);
return res;
}
/*-------------------------------------------------------------*
* Utility for encoding and decoding data with ascii85 *
*-------------------------------------------------------------*/
/*!
* encodeAscii85()
*
* Input: inarray (input data)
* insize (number of bytes in input array)
* &outsize (<return> number of bytes in output char array)
* Return: chara (with 64 characters + \n in each line)
*
* Notes:
* (1) Ghostscript has a stack break if the last line of
* data only has a '>', so we avoid the problem by
* always putting '~>' on the last line.
*/
char *
encodeAscii85(l_uint8 *inarray,
l_int32 insize,
l_int32 *poutsize)
{
char *chara;
char *outbuf;
l_int32 maxsize, i, index, outindex, linecount, nbout, eof;
PROCNAME("encodeAscii85");
if (!inarray)
return (char *)ERROR_PTR("inarray not defined", procName, NULL);
/* Accumulate results in chara */
maxsize = (l_int32)(80. + (insize * 5. / 4.) *
(1. + 2. / MAX_85_LINE_COUNT));
if ((chara = (char *)CALLOC(maxsize, sizeof(char))) == NULL)
return (char *)ERROR_PTR("chara not made", procName, NULL);
if ((outbuf = (char *)CALLOC(8, sizeof(char))) == NULL)
return (char *)ERROR_PTR("outbuf not made", procName, NULL);
linecount = 0;
index = 0;
outindex = 0;
while (1) {
eof = convertChunkToAscii85(inarray, insize, &index, outbuf, &nbout);
for (i = 0; i < nbout; i++) {
chara[outindex++] = outbuf[i];
linecount++;
if (linecount >= MAX_85_LINE_COUNT) {
chara[outindex++] = '\n';
linecount = 0;
}
}
if (eof == TRUE) {
if (linecount != 0)
chara[outindex++] = '\n';
chara[outindex++] = '~';
chara[outindex++] = '>';
chara[outindex++] = '\n';
break;
}
}
FREE(outbuf);
*poutsize = outindex;
return chara;
}
/*!
* convertChunkToAscii85()
*
* Input: inarray (input data)
* insize (number of bytes in input array)
* &index (use and <return> -- ptr)
* outbuf (holds 8 ascii chars; we use no more than 7)
* &nbsout (<return> number of bytes written to outbuf)
* Return: boolean for eof (0 if more data, 1 if end of file)
*
* Notes:
* (1) Attempts to read 4 bytes and write 5.
* (2) Writes 1 byte if the value is 0.
*/
l_int32
convertChunkToAscii85(l_uint8 *inarray,
l_int32 insize,
l_int32 *pindex,
char *outbuf,
l_int32 *pnbout)
{
l_uint8 inbyte;
l_uint32 inword, val;
l_int32 eof, index, nread, nbout, i;
eof = FALSE;
index = *pindex;
nread = L_MIN(4, (insize - index));
if (insize == index + nread)
eof = TRUE;
*pindex += nread; /* save new index */
/* Read input data and save in l_uint32 */
inword = 0;
for (i = 0; i < nread; i++) {
inbyte = inarray[index + i];
inword += inbyte << (8 * (3 - i));
}
#if 0
fprintf(stderr, "index = %d, nread = %d\n", index, nread);
fprintf(stderr, "inword = %x\n", inword);
fprintf(stderr, "eof = %d\n", eof);
#endif
/* Special case: output 1 byte only */
if (inword == 0) {
outbuf[0] = 'z';
nbout = 1;
}
else { /* output nread + 1 bytes */
for (i = 4; i >= 4 - nread; i--) {
val = inword / power85[i];
outbuf[4 - i] = (l_uint8)(val + '!');
inword -= val * power85[i];
}
nbout = nread + 1;
}
*pnbout = nbout;
return eof;
}
/*!
* decodeAscii85()
*
* Input: inarray (ascii85 input data)
* insize (number of bytes in input array)
* &outsize (<return> number of bytes in output l_uint8 array)
* Return: outarray (binary)
*
* Notes:
* (1) We assume the data is properly encoded, so we do not check
* for invalid characters or the final '>' character.
* (2) We permit whitespace to be added to the encoding in an
* arbitrary way.
*/
l_uint8 *
decodeAscii85(char *ina,
l_int32 insize,
l_int32 *poutsize)
{
char inc;
char *pin;
l_uint8 val;
l_uint8 *outa;
l_int32 maxsize, ocount, bytecount, index;
l_uint32 oword;
PROCNAME("decodeAscii85");
if (!ina)
return (l_uint8 *)ERROR_PTR("ina not defined", procName, NULL);
/* Accumulate results in outa */
maxsize = (l_int32)(80. + (insize * 4. / 5.)); /* plenty big */
if ((outa = (l_uint8 *)CALLOC(maxsize, sizeof(l_uint8))) == NULL)
return (l_uint8 *)ERROR_PTR("outa not made", procName, NULL);
pin = ina;
ocount = 0; /* byte index into outa */
oword = 0;
for (index = 0, bytecount = 0; index < insize; index++, pin++) {
inc = *pin;
if (inc == ' ' || inc == '\t' || inc == '\n' ||
inc == '\f' || inc == '\r' || inc == '\v') /* ignore white space */
continue;
val = inc - '!';
if (val < 85) {
oword = oword * 85 + val;
if (bytecount < 4)
bytecount++;
else { /* we have all 5 input chars for the oword */
outa[ocount] = (oword >> 24) & 0xff;
outa[ocount + 1] = (oword >> 16) & 0xff;
outa[ocount + 2] = (oword >> 8) & 0xff;
outa[ocount + 3] = oword & 0xff;
ocount += 4;
bytecount = 0;
oword = 0;
}
}
else if (inc == 'z' && bytecount == 0) {
outa[ocount] = 0;
outa[ocount + 1] = 0;
outa[ocount + 2] = 0;
outa[ocount + 3] = 0;
ocount += 4;
}
else if (inc == '~') { /* end of data */
fprintf(stderr, " %d extra bytes output\n", bytecount - 1);
switch (bytecount) {
case 0: /* normal eof */
case 1: /* error */
break;
case 2: /* 1 extra byte */
oword = oword * (85 * 85 * 85) + 0xffffff;
outa[ocount] = (oword >> 24) & 0xff;
break;
case 3: /* 2 extra bytes */
oword = oword * (85 * 85) + 0xffff;
outa[ocount] = (oword >> 24) & 0xff;
outa[ocount + 1] = (oword >> 16) & 0xff;
break;
case 4: /* 3 extra bytes */
oword = oword * 85 + 0xff;
outa[ocount] = (oword >> 24) & 0xff;
outa[ocount + 1] = (oword >> 16) & 0xff;
outa[ocount + 2] = (oword >> 8) & 0xff;
break;
}
if (bytecount > 1)
ocount += (bytecount - 1);
break;
}
}
*poutsize = ocount;
return outa;
}
/* --------------------------------------------*/
#endif /* USE_PSIO */
/* --------------------------------------------*/
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