/* * convertToPSEmbed() * * Input: filein (input image file -- any format) * fileout (output ps file) * level (compression: 1 (uncompressed), 2 or 3) * Return: 0 if OK, 1 on error * * Notes: * (1) This is a wrapper function that generates a PS file with * a bounding box, from any input image file. * (2) Do the best job of compression given the specified level. * @level=3 does flate compression on anything that is not * tiffg4 (1 bpp) or jpeg (8 bpp or rgb). * (3) If @level=2 and the file is not tiffg4 or jpeg, it will * first be written to file as jpeg with quality = 75. * This will remove the colormap and cause some degradation * in the image. * (4) The bounding box is required when a program such as TeX * (through epsf) places and rescales the image. It is * sized for fitting the image to an 8.5 x 11.0 inch page. */ l_int32 convertToPSEmbed(const char *filein, const char *fileout, l_int32 level) { const char nametif[] = "/tmp/junk_convert_ps_embed.tif"; const char namejpg[] = "/tmp/junk_convert_ps_embed.jpg"; l_int32 d, format; FILE *fp; PIX *pix, *pixs; PROCNAME("convertToPSEmbed"); if (!filein) return ERROR_INT("filein not defined", procName, 1); if (!fileout) return ERROR_INT("fileout not defined", procName, 1); if (level != 1 && level != 2 && level != 3) { L_ERROR("invalid level specified; using level 2", procName); level = 2; } if (level == 1) { /* no compression */ pixWritePSEmbed(filein, fileout); return 0; } /* Find the format and write out directly if in jpeg or tiff g4 */ if ((fp = fopen(filein, "rb")) == NULL) return ERROR_INT("filein not found", procName, 1); findFileFormat(fp, &format); fclose(fp); if (format == IFF_JFIF_JPEG) { convertJpegToPSEmbed(filein, fileout); return 0; } else if (format == IFF_TIFF_G4) { convertTiffG4ToPSEmbed(filein, fileout); return 0; } /* If level 3, flate encode. */ if (level == 3) { convertFlateToPSEmbed(filein, fileout); return 0; } /* OK, it's level 2, so we must convert to jpeg or tiff g4 */ if ((pixs = pixRead(filein)) == NULL) return ERROR_INT("image not read from file", procName, 1); d = pixGetDepth(pixs); if ((d == 2 || d == 4) && !pixGetColormap(pixs)) pix = pixConvertTo8(pixs, 0); else if (d == 16) pix = pixConvert16To8(pixs, 1); else pix = pixRemoveColormap(pixs, REMOVE_CMAP_BASED_ON_SRC); d = pixGetDepth(pix); if (d == 1) { pixWrite(nametif, pix, IFF_TIFF_G4); convertTiffG4ToPSEmbed(nametif, fileout); } else { pixWrite(namejpg, pix, IFF_JFIF_JPEG); convertJpegToPSEmbed(namejpg, fileout); } pixDestroy(&pix); pixDestroy(&pixs); return 0; }
/* * convertToPSEmbed() * * Input: filein (input image file -- any format) * fileout (output ps file) * level (compression: 1 (uncompressed), 2 or 3) * Return: 0 if OK, 1 on error * * Notes: * (1) This is a wrapper function that generates a PS file with * a bounding box, from any input image file. * (2) Do the best job of compression given the specified level. * %level=3 does flate compression on anything that is not * tiffg4 (1 bpp) or jpeg (8 bpp or rgb). * (3) If %level=2 and the file is not tiffg4 or jpeg, it will * first be written to file as jpeg with quality = 75. * This will remove the colormap and cause some degradation * in the image. * (4) The bounding box is required when a program such as TeX * (through epsf) places and rescales the image. It is * sized for fitting the image to an 8.5 x 11.0 inch page. */ l_int32 convertToPSEmbed(const char *filein, const char *fileout, l_int32 level) { char *tname; l_int32 d, format; PIX *pix, *pixs; PROCNAME("convertToPSEmbed"); if (!filein) return ERROR_INT("filein not defined", procName, 1); if (!fileout) return ERROR_INT("fileout not defined", procName, 1); if (level != 1 && level != 2 && level != 3) { L_ERROR("invalid level specified; using level 2\n", procName); level = 2; } if (level == 1) { /* no compression */ pixWritePSEmbed(filein, fileout); return 0; } /* Find the format and write out directly if in jpeg or tiff g4 */ findFileFormat(filein, &format); if (format == IFF_JFIF_JPEG) { convertJpegToPSEmbed(filein, fileout); return 0; } else if (format == IFF_TIFF_G4) { convertG4ToPSEmbed(filein, fileout); return 0; } else if (format == IFF_UNKNOWN) { L_ERROR("format of %s not known\n", procName, filein); return 1; } /* If level 3, flate encode. */ if (level == 3) { convertFlateToPSEmbed(filein, fileout); return 0; } /* OK, it's level 2, so we must convert to jpeg or tiff g4 */ if ((pixs = pixRead(filein)) == NULL) return ERROR_INT("image not read from file", procName, 1); d = pixGetDepth(pixs); if ((d == 2 || d == 4) && !pixGetColormap(pixs)) pix = pixConvertTo8(pixs, 0); else if (d == 16) pix = pixConvert16To8(pixs, 1); else pix = pixRemoveColormap(pixs, REMOVE_CMAP_BASED_ON_SRC); d = pixGetDepth(pix); tname = l_makeTempFilename(NULL); if (d == 1) { pixWrite(tname, pix, IFF_TIFF_G4); convertG4ToPSEmbed(tname, fileout); } else { pixWrite(tname, pix, IFF_JFIF_JPEG); convertJpegToPSEmbed(tname, fileout); } lept_rmfile(tname); LEPT_FREE(tname); pixDestroy(&pix); pixDestroy(&pixs); return 0; }