diff options
Diffstat (limited to 'frontend/scanimage.c')
| -rw-r--r-- | frontend/scanimage.c | 100 |
1 files changed, 88 insertions, 12 deletions
diff --git a/frontend/scanimage.c b/frontend/scanimage.c index 7f7c1f0..fe02750 100644 --- a/frontend/scanimage.c +++ b/frontend/scanimage.c @@ -56,6 +56,7 @@ #include "../include/sane/sanei.h" #include "../include/sane/saneopts.h" +#include "sicc.h" #include "stiff.h" #include "../include/md5.h" @@ -322,7 +323,7 @@ auth_callback (SANE_String_Const resource, } } -static RETSIGTYPE +static void sighandler (int signum) { static SANE_Bool first_time = SANE_TRUE; @@ -1165,9 +1166,14 @@ write_pnm_header (SANE_Frame format, int width, int height, int depth, FILE *ofp #ifdef HAVE_LIBPNG static void -write_png_header (SANE_Frame format, int width, int height, int depth, FILE *ofp, png_structp* png_ptr, png_infop* info_ptr) +write_png_header (SANE_Frame format, int width, int height, int depth, int dpi, const char * icc_profile, FILE *ofp, png_structp* png_ptr, png_infop* info_ptr) { int color_type; + /* PNG does not have imperial reference units, so we must convert to metric. */ + /* There are nominally 39.3700787401575 inches in a meter. */ + const double pixels_per_meter = dpi * 39.3700787401575; + size_t icc_size = 0; + void *icc_buffer; *png_ptr = png_create_write_struct (PNG_LIBPNG_VER_STRING, NULL, NULL, NULL); @@ -1200,13 +1206,47 @@ write_png_header (SANE_Frame format, int width, int height, int depth, FILE *ofp depth, color_type, PNG_INTERLACE_NONE, PNG_COMPRESSION_TYPE_BASE, PNG_FILTER_TYPE_BASE); + png_set_pHYs(*png_ptr, *info_ptr, + pixels_per_meter, pixels_per_meter, + PNG_RESOLUTION_METER); + + if (icc_profile) + { + icc_buffer = sanei_load_icc_profile(icc_profile, &icc_size); + if (icc_size > 0) + { + /* libpng will abort if the profile and image colour spaces do not match*/ + /* The data colour space field is at bytes 16 to 20 in an ICC profile */ + /* see: ICC.1:2010 ยง 7.2.6 */ + int is_gray_profile = strncmp((char *) icc_buffer + 16, "GRAY", 4) == 0; + int is_rgb_profile = strncmp((char *) icc_buffer + 16, "RGB ", 4) == 0; + if ((is_gray_profile && color_type == PNG_COLOR_TYPE_GRAY) || + (is_rgb_profile && color_type == PNG_COLOR_TYPE_RGB)) + { + png_set_iCCP(*png_ptr, *info_ptr, basename(icc_profile), PNG_COMPRESSION_TYPE_BASE, icc_buffer, icc_size); + } + else + { + if (is_gray_profile) + { + fprintf(stderr, "Ignoring 'GRAY' space ICC profile because the image is RGB.\n"); + } + if (is_rgb_profile) + { + fprintf(stderr, "Ignoring 'RGB ' space ICC profile because the image is Grayscale.\n"); + } + } + free(icc_buffer); + } + } + png_write_info(*png_ptr, *info_ptr); } #endif #ifdef HAVE_LIBJPEG static void -write_jpeg_header (SANE_Frame format, int width, int height, FILE *ofp, struct jpeg_compress_struct *cinfo, struct jpeg_error_mgr *jerr) +write_jpeg_header (SANE_Frame format, int width, int height, int dpi, FILE *ofp, struct jpeg_compress_struct *cinfo, struct jpeg_error_mgr *jerr) { cinfo->err = jpeg_std_error(jerr); jpeg_create_compress(cinfo); @@ -1231,6 +1271,11 @@ write_jpeg_header (SANE_Frame format, int width, int height, FILE *ofp, struct j } jpeg_set_defaults(cinfo); + /* jpeg_set_defaults overrides density, be careful. */ + cinfo->density_unit = 1; /* Inches */ + cinfo->X_density = cinfo->Y_density = dpi; + cinfo->write_JFIF_header = TRUE; + jpeg_set_quality(cinfo, 75, TRUE); jpeg_start_compress(cinfo, TRUE); } @@ -1379,13 +1424,15 @@ scan_it (FILE *ofp) #ifdef HAVE_LIBPNG case OUTPUT_PNG: write_png_header (parm.format, parm.pixels_per_line, - parm.lines, parm.depth, ofp, &png_ptr, &info_ptr); + parm.lines, parm.depth, resolution_value, + icc_profile, ofp, &png_ptr, &info_ptr); break; #endif #ifdef HAVE_LIBJPEG case OUTPUT_JPEG: write_jpeg_header (parm.format, parm.pixels_per_line, - parm.lines, ofp, &cinfo, &jerr); + parm.lines, resolution_value, + ofp, &cinfo, &jerr); break; #endif } @@ -1529,6 +1576,21 @@ scan_it (FILE *ofp) for(j = 0; j < parm.bytes_per_line; j++) pngbuf[j] = ~pngbuf[j]; } +#ifndef WORDS_BIGENDIAN + /* SANE is endian-native, PNG is big-endian, */ + /* see: https://www.w3.org/TR/2003/REC-PNG-20031110/#7Integers-and-byte-order */ + if (parm.depth == 16) + { + int j; + for (j = 0; j < parm.bytes_per_line; j += 2) + { + SANE_Byte LSB; + LSB = pngbuf[j]; + pngbuf[j] = pngbuf[j + 1]; + pngbuf[j + 1] = LSB; + } + } +#endif png_write_row(png_ptr, pngbuf); i += parm.bytes_per_line - pngrow; left -= parm.bytes_per_line - pngrow; @@ -1635,13 +1697,15 @@ scan_it (FILE *ofp) #ifdef HAVE_LIBPNG case OUTPUT_PNG: write_png_header (parm.format, parm.pixels_per_line, - image.height, parm.depth, ofp, &png_ptr, &info_ptr); + image.height, parm.depth, resolution_value, + icc_profile, ofp, &png_ptr, &info_ptr); break; #endif #ifdef HAVE_LIBJPEG case OUTPUT_JPEG: write_jpeg_header (parm.format, parm.pixels_per_line, - parm.lines, ofp, &cinfo, &jerr); + parm.lines, resolution_value, + ofp, &cinfo, &jerr); break; #endif } @@ -2474,9 +2538,16 @@ List of available devices:", prog_name); ofp = stdout; if (batch) - fprintf (stderr, - "Scanning %d pages, incrementing by %d, numbering from %d\n", - batch_count, batch_increment, batch_start_at); + { + fputs("Scanning ", stderr); + if (batch_count == BATCH_COUNT_UNLIMITED) + fputs("infinity", stderr); + else + fprintf(stderr, "%d", batch_count); + fprintf (stderr, + " page%s, incrementing by %d, numbering from %d\n", + batch_count == 1 ? "" : "s", batch_increment, batch_start_at); + } else if(isatty(fileno(ofp))){ fprintf (stderr,"%s: output is not a file, exiting\n", prog_name); @@ -2509,8 +2580,6 @@ List of available devices:", prog_name); if (readbuf2 == NULL) { - fprintf (stderr, "Batch terminated, %d pages scanned\n", - (n - batch_increment)); if (ofp) { fclose (ofp); @@ -2612,6 +2681,13 @@ List of available devices:", prog_name); && (batch_count == BATCH_COUNT_UNLIMITED || --batch_count)) && SANE_STATUS_GOOD == status); + if (batch) + { + int num_pgs = (n - batch_start_at) / batch_increment; + fprintf (stderr, "Batch terminated, %d page%s scanned\n", + num_pgs, num_pgs == 1 ? "" : "s"); + } + if (batch && SANE_STATUS_NO_DOCS == status && (batch_count == BATCH_COUNT_UNLIMITED) |