/*
* pixWriteMixedToPS()
*
* Input: pixb (<optionall> 1 bpp "mask"; typically for text)
* pixc (<optional> 8 or 32 bpp image regions)
* scale (relative scale factor for rendering pixb
* relative to pixc; typ. 4.0)
* pageno (page number in set; use 1 for new output file)
* fileout (output ps file)
* Return: 0 if OK, 1 on error
*
* Notes:
* (1) This low level function generates the PS string for a mixed
* text/image page, and adds it to an existing file if
* @pageno > 1.
* (2) The two images (pixb and pixc) are typically generated at the
* resolution that they will be rendered in the PS file.
* (3) pixb is the text component. In the PostScript world, we think of
* it as a mask through which we paint black.
* (4) pixc is the (typically halftone) image component. It is
* white in the rest of the page. To minimize the size of the
* PS file, it should be rendered at a resolution that is at
* least equal to its actual resolution.
* (5) @scale gives the ratio of resolution of pixb to pixc.
* Typical resolutions are: 600 ppi for pixb, 150 ppi for pixc;
* so @scale = 4.0. If one of the images is not defined,
* the value of @scale is ignored.
* (6) We write pixc with DCT compression (jpeg). This is followed
* by painting the text as black through the mask pixb. If
* pixc doesn't exist (alltext), we write the text with the
* PS "image" operator instead of the "imagemask" operator,
* because ghostscript's ps2pdf is flaky when the latter is used.
* (7) The actual output resolution is determined by fitting the
* result to a letter-size (8.5 x 11 inch) page.
*/
l_int32
pixWriteMixedToPS(PIX *pixb,
PIX *pixc,
l_float32 scale,
l_int32 pageno,
const char *fileout)
{
const char tnameb[] = "/tmp/junk_pix_write_mixed.tif";
const char tnamec[] = "/tmp/junk_pix_write_mixed.jpg";
const char *op;
l_int32 resb, resc, endpage, maskop, ret;
PROCNAME("pixWriteMixedToPS");
if (!pixb && !pixc)
return ERROR_INT("pixb and pixc both undefined", procName, 1);
if (!fileout)
return ERROR_INT("fileout not defined", procName, 1);
/* Compute the resolution that fills a letter-size page. */
if (!pixc)
resb = getResLetterPage(pixGetWidth(pixb), pixGetHeight(pixb), 0);
else {
resc = getResLetterPage(pixGetWidth(pixc), pixGetHeight(pixc), 0);
if (pixb)
resb = (l_int32)(scale * resc);
}
/* Write the jpeg image first */
if (pixc) {
pixWrite(tnamec, pixc, IFF_JFIF_JPEG);
endpage = (pixb) ? FALSE : TRUE;
op = (pageno <= 1) ? "w" : "a";
ret = convertJpegToPS(tnamec, fileout, op, 0, 0, resc, 1.0,
pageno, endpage);
if (ret)
return ERROR_INT("jpeg data not written", procName, 1);
}
/* Write the binary data, either directly or, if there is
* a jpeg image on the page, through the mask. */
if (pixb) {
pixWrite(tnameb, pixb, IFF_TIFF_G4);
op = (pageno <= 1 && !pixc) ? "w" : "a";
maskop = (pixc) ? 1 : 0;
ret = convertTiffG4ToPS(tnameb, fileout, op, 0, 0, resb, 1.0,
pageno, maskop, 1);
if (ret)
return ERROR_INT("tiff data not written", procName, 1);
}
return 0;
}
/*
* writeImageCompressedToPSFile()
*
* Input: filein (input image file)
* fileout (output ps file)
* res (output printer resolution)
* &firstfile (<input and return> 1 if the first image;
* 0 otherwise)
* &index (<input and return> index of image in output ps file)
* Return: 0 if OK, 1 on error
*
* Notes:
* (1) This wraps a single page image in PS.
* (2) The input file can be in any format. It is compressed as follows:
* * if in tiffg4 --> use ccittg4
* * if in jpeg --> use dct
* * all others --> use flate
* (3) @index is incremented if the page is successfully written.
*/
l_int32
writeImageCompressedToPSFile(const char *filein,
const char *fileout,
l_int32 res,
l_int32 *pfirstfile,
l_int32 *pindex)
{
const char *op;
l_int32 format, retval;
FILE *fp;
PROCNAME("writeImageCompressedToPSFile");
if (!pfirstfile || !pindex)
return ERROR_INT("&firstfile and &index not defined", procName, 1);
if ((fp = fopenReadStream(filein)) == NULL)
return ERROR_INT("filein not found", procName, 1);
findFileFormat(fp, &format);
fclose(fp);
if (format == IFF_UNKNOWN) {
L_ERROR_STRING("Format of %s not known", procName, filein);
return 1;
}
op = (*pfirstfile == TRUE) ? "w" : "a";
if (format == IFF_JFIF_JPEG) {
retval = convertJpegToPS(filein, fileout, op, 0, 0,
res, 1.0, *pindex + 1, TRUE);
if (retval == 0) {
*pfirstfile = FALSE;
(*pindex)++;
}
}
else if (format == IFF_TIFF_G4) {
retval = convertTiffG4ToPS(filein, fileout, op, 0, 0,
res, 1.0, *pindex + 1, FALSE, TRUE);
if (retval == 0) {
*pfirstfile = FALSE;
(*pindex)++;
}
}
else { /* all other image formats */
retval = convertFlateToPS(filein, fileout, op, 0, 0,
res, 1.0, *pindex + 1, TRUE);
if (retval == 0) {
*pfirstfile = FALSE;
(*pindex)++;
}
}
return retval;
}
main(int argc,
char **argv)
{
l_int32 w, h, success, display;
l_float32 factor, scale;
BOX *box;
FILE *fp, *fp1;
PIX *pixs, *pixt;
if (regTestSetup(argc, argv, &fp, &display, &success, NULL))
return 1;
factor = 0.95;
/* Uncompressed PS with scaling but centered on the page */
pixs = pixRead("feyn-fract.tif");
pixGetDimensions(pixs, &w, &h, NULL);
scale = L_MIN(factor * 2550 / w, factor * 3300 / h);
fp1 = fopen("/tmp/psio0.ps", "wb+");
pixWriteStreamPS(fp1, pixs, NULL, 300, scale);
fclose(fp1);
regTestCheckFile(fp, argv, "/tmp/psio0.ps", 0, &success);
pixDestroy(&pixs);
/* Uncompressed PS with scaling, with LL corner at (1500, 1500) mils */
pixs = pixRead("weasel4.11c.png");
pixGetDimensions(pixs, &w, &h, NULL);
scale = L_MIN(factor * 2550 / w, factor * 3300 / h);
box = boxCreate(1500, 1500, (l_int32)(1000 * scale * w / 300),
(l_int32)(1000 * scale * h / 300));
fp1 = fopen("/tmp/psio1.ps", "wb+");
pixWriteStreamPS(fp1, pixs, box, 300, 1.0);
fclose(fp1);
regTestCheckFile(fp, argv, "/tmp/psio1.ps", 1, &success);
boxDestroy(&box);
pixDestroy(&pixs);
/* DCT compressed PS with LL corner at (300, 1000) pixels */
pixs = pixRead("marge.jpg");
pixt = pixConvertTo32(pixs);
pixWrite("/tmp/psio2.jpg", pixt, IFF_JFIF_JPEG);
convertJpegToPS("/tmp/psio2.jpg", "/tmp/psio3.ps",
"w", 300, 1000, 0, 4.0, 1, 1);
regTestCheckFile(fp, argv, "/tmp/psio2.jpg", 2, &success);
regTestCheckFile(fp, argv, "/tmp/psio3.ps", 3, &success);
pixDestroy(&pixt);
pixDestroy(&pixs);
/* For each page, apply tiff g4 image first; then jpeg or png over it */
convertTiffG4ToPS("feyn.tif", "/tmp/psio4.ps",
"w", 0, 0, 0, 1.0, 1, 1, 0);
convertJpegToPS("marge.jpg", "/tmp/psio4.ps",
"a", 500, 100, 300, 2.0, 1, 0);
convertFlateToPS("weasel4.11c.png", "/tmp/psio4.ps",
"a", 300, 400, 300, 6.0, 1, 0);
convertJpegToPS("marge.jpg", "/tmp/psio4.ps",
"a", 100, 800, 300, 1.5, 1, 1);
convertTiffG4ToPS("feyn.tif", "/tmp/psio4.ps",
"a", 0, 0, 0, 1.0, 2, 1, 0);
convertJpegToPS("marge.jpg", "/tmp/psio4.ps",
"a", 1000, 700, 300, 2.0, 2, 0);
convertJpegToPS("marge.jpg", "/tmp/psio4.ps",
"a", 100, 200, 300, 2.0, 2, 1);
convertTiffG4ToPS("feyn.tif", "/tmp/psio4.ps",
"a", 0, 0, 0, 1.0, 3, 1, 0);
convertJpegToPS("marge.jpg", "/tmp/psio4.ps",
"a", 200, 200, 300, 2.0, 3, 0);
convertJpegToPS("marge.jpg", "/tmp/psio4.ps",
"a", 200, 900, 300, 2.0, 3, 1);
regTestCheckFile(fp, argv, "/tmp/psio4.ps", 4, &success);
/* Now apply jpeg first; then paint through a g4 mask.
* For gv, the first image with a b.b. determines the
* window size for the canvas, so we put down the largest
* image first. If we had rendered a small image first,
* gv and evince will not show the entire page. However, after
* conversion to pdf, everything works fine, regardless of the
* order in which images are placed into the PS. That is
* because the pdf interpreter is robust to bad hints, ignoring
* the page hints and computing the bounding box from the
* set of images rendered on the page. */
pixs = pixRead("wyom.jpg");
pixt = pixScaleToSize(pixs, 2528, 3300);
pixWrite("/tmp/psio5.jpg", pixt, IFF_JFIF_JPEG);
pixDestroy(&pixs);
pixDestroy(&pixt);
convertJpegToPS("/tmp/psio5.jpg", "/tmp/psio5.ps",
"w", 0, 0, 0, 1.0, 1, 0);
convertFlateToPS("weasel8.240c.png", "/tmp/psio5.ps",
"a", 100, 100, 300, 5.0, 1, 0);
convertFlateToPS("weasel8.149g.png", "/tmp/psio5.ps",
"a", 200, 300, 300, 5.0, 1, 0);
convertFlateToPS("weasel4.11c.png", "/tmp/psio5.ps",
"a", 300, 500, 300, 5.0, 1, 0);
convertTiffG4ToPS("feyn.tif", "/tmp/psio5.ps",
"a", 0, 0, 0, 1.0, 1, 1, 1);
convertJpegToPS("marge.jpg", "/tmp/psio5.ps",
"a", 500, 100, 300, 2.0, 2, 0);
convertFlateToPS("weasel4.11c.png", "/tmp/psio5.ps",
"a", 300, 400, 300, 6.0, 2, 0);
convertJpegToPS("marge.jpg", "/tmp/psio5.ps",
"a", 100, 800, 300, 1.5, 2, 0);
convertTiffG4ToPS("feyn.tif", "/tmp/psio5.ps",
"a", 0, 0, 0, 1.0, 2, 1, 1);
convertJpegToPS("marge.jpg", "/tmp/psio5.ps",
"a", 500, 100, 300, 2.0, 3, 0);
convertJpegToPS("marge.jpg", "/tmp/psio5.ps",
"a", 100, 800, 300, 2.0, 3, 0);
convertTiffG4ToPS("feyn.tif", "/tmp/psio5.ps",
"a", 0, 0, 0, 1.0, 3, 1, 1);
convertJpegToPS("marge.jpg", "/tmp/psio5.ps",
"a", 1000, 700, 300, 2.0, 4, 0);
convertJpegToPS("marge.jpg", "/tmp/psio5.ps",
"a", 100, 200, 300, 2.0, 4, 0);
convertTiffG4ToPS("feyn.tif", "/tmp/psio5.ps",
"a", 0, 0, 0, 1.0, 4, 1, 1);
convertJpegToPS("marge.jpg", "/tmp/psio5.ps",
"a", 200, 200, 300, 2.0, 5, 0);
convertJpegToPS("marge.jpg", "/tmp/psio5.ps",
"a", 200, 900, 300, 2.0, 5, 0);
convertTiffG4ToPS("feyn.tif", "/tmp/psio5.ps",
"a", 0, 0, 0, 1.0, 5, 1, 1);
regTestCheckFile(fp, argv, "/tmp/psio5.ps", 5, &success);
/* Generation using segmentation masks */
convertSegmentedPagesToPS(".", "lion-page", ".", "lion-mask",
10, 0, 100, 2.0, 0.8, 190, "/tmp/psio6.ps");
regTestCheckFile(fp, argv, "/tmp/psio6.ps", 6, &success);
regTestCleanup(argc, argv, fp, success, NULL);
return 0;
}
