static void
convertImage(FILE * const ofP,
struct cmdlineInfo const cmdline,
struct jpeg_decompress_struct * const cinfoP) {
int format;
/* The type of output file, PGM or PPM. Value is either PPM_TYPE
or PGM_TYPE, which conveniently also pass as format values
PPM_FORMAT and PGM_FORMAT.
*/
xelval maxval;
/* The maximum value of a sample (color component), both in the input
and the output.
*/
enum colorspace color_space;
/* The color space of the pixels coming out of the JPEG decompressor */
beginJpegInput(cinfoP, cmdline.verbose,
cmdline.dct_method,
cmdline.max_memory_to_use, cmdline.nosmooth);
set_color_spaces(cinfoP->jpeg_color_space, &format,
&cinfoP->out_color_space);
maxval = pm_bitstomaxval(cinfoP->data_precision);
if (cmdline.verbose)
tellDetails(*cinfoP, maxval, format);
/* Calculate output image dimensions so we can allocate space */
jpeg_calc_output_dimensions(cinfoP);
/* Start decompressor */
jpeg_start_decompress(cinfoP);
if (ofP)
/* Write pnm output header */
pnm_writepnminit(ofP, cinfoP->output_width, cinfoP->output_height,
maxval, format, FALSE);
pnmbuffer = pnm_allocrow(cinfoP->output_width);
color_space = computeColorSpace(cinfoP, cmdline.inklevel);
convertRaster(cinfoP, color_space, ofP, format, maxval);
if (cmdline.comments)
print_comments(*cinfoP);
if (cmdline.dumpexif)
dump_exif(*cinfoP);
if (cmdline.exif_filespec)
save_exif(*cinfoP, cmdline.exif_filespec);
pnm_freerow(pnmbuffer);
/* Finish decompression and release decompressor memory. */
jpeg_finish_decompress(cinfoP);
}
static void
convertImage(FILE * const ofP,
struct cmdlineInfo const cmdline,
struct jpeg_decompress_struct * const cinfoP) {
int output_type;
/* The type of output file, PGM or PPM. Value is either PPM_TYPE
or PGM_TYPE, which conveniently also pass as format values
PPM_FORMAT and PGM_FORMAT.
*/
JSAMPROW jpegbuffer; /* Input buffer. Filled by jpeg_scanlines() */
unsigned int maxval;
/* The maximum value of a sample (color component), both in the input
and the output.
*/
enum colorspace color_space;
/* The color space of the pixels coming out of the JPEG decompressor */
beginJpegInput(cinfoP, cmdline.verbose,
cmdline.dct_method,
cmdline.max_memory_to_use, cmdline.nosmooth);
set_color_spaces(cinfoP->jpeg_color_space, &output_type,
&cinfoP->out_color_space);
maxval = (1 << cinfoP->data_precision) - 1;
if (cmdline.verbose)
tellDetails(*cinfoP, maxval, output_type);
/* Calculate output image dimensions so we can allocate space */
jpeg_calc_output_dimensions(cinfoP);
overflow2(cinfoP->output_width, cinfoP->output_components);
jpegbuffer = ((*cinfoP->mem->alloc_sarray)
((j_common_ptr) cinfoP, JPOOL_IMAGE,
cinfoP->output_width * cinfoP->output_components,
(JDIMENSION) 1)
)[0];
/* Start decompressor */
jpeg_start_decompress(cinfoP);
if (ofP)
/* Write pnm output header */
pnm_writepnminit(ofP, cinfoP->output_width, cinfoP->output_height,
maxval, output_type, FALSE);
pnmbuffer = pnm_allocrow(cinfoP->output_width);
color_space = computeColorSpace(cinfoP, cmdline.inklevel);
/* Process data */
while (cinfoP->output_scanline < cinfoP->output_height) {
jpeg_read_scanlines(cinfoP, &jpegbuffer, 1);
if (ofP)
copy_pixel_row(jpegbuffer, cinfoP->output_width,
cinfoP->out_color_components,
color_space, maxval, ofP, output_type);
}
if (cmdline.comments)
print_comments(*cinfoP);
if (cmdline.dumpexif)
dump_exif(*cinfoP);
if (cmdline.exif_filespec)
save_exif(*cinfoP, cmdline.exif_filespec);
pnm_freerow(pnmbuffer);
/* Finish decompression and release decompressor memory. */
jpeg_finish_decompress(cinfoP);
}