static int
bitmap_decode(struct jpeg_decompress_struct *cinfo, Vbitmap *vbitmap,
YmagineFormatOptions *options)
{
int nlines = -1;
cinfo->client_data = (void*) vbitmap;
if (prepareDecompressor(cinfo, options) != YMAGINE_OK) {
return nlines;
}
/* Intercept APP1 markers for PhotoSphere parsing */
jpeg_set_marker_processor(cinfo, JPEG_APP0 + 1, APP1_handler);
if (startDecompressor(cinfo, VbitmapColormode(vbitmap)) != YMAGINE_OK) {
return nlines;
}
YmagineFormatOptions_invokeCallback(options, YMAGINE_IMAGEFORMAT_JPEG,
cinfo->image_width, cinfo->image_height);
#if YMAGINE_DEBUG_JPEG
ALOGD("bitmap_decode: in=%dx%d bm=%dx%d max=%dx%d",
cinfo->image_width, cinfo->image_height,
VbitmapWidth(vbitmap), VbitmapHeight(vbitmap),
options->maxwidth, options->maxheight);
#endif
nlines = decompress_jpeg(cinfo, NULL, JCOPYOPT_NONE,
vbitmap, options);
return nlines;
}
/*
* fgetJpegComment()
*
* Input: fp (file stream opened for read)
* &comment (<return> comment)
* Return: 0 if OK; 1 on error
*
* Notes:
* (1) Side-effect: this rewinds the stream.
*/
l_int32
fgetJpegComment(FILE *fp,
l_uint8 **pcomment)
{
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
struct callback_data cb_data; /* contains local jmp_buf */
PROCNAME("fgetJpegComment");
if (!pcomment)
return ERROR_INT("&comment not defined", procName, 1);
*pcomment = NULL;
if (!fp)
return ERROR_INT("stream not opened", procName, 1);
rewind(fp);
/* Modify the jpeg error handling to catch fatal errors */
cinfo.err = jpeg_std_error(&jerr);
jerr.error_exit = jpeg_error_catch_all_2;
cb_data.comment = NULL;
cinfo.client_data = (void *)&cb_data;
if (setjmp(cb_data.jmpbuf)) {
LEPT_FREE(cb_data.comment);
return ERROR_INT("internal jpeg error", procName, 1);
}
/* Initialize the jpeg structs for reading the header */
jpeg_create_decompress(&cinfo);
jpeg_set_marker_processor(&cinfo, JPEG_COM, jpeg_comment_callback);
jpeg_stdio_src(&cinfo, fp);
jpeg_read_header(&cinfo, TRUE);
/* Save the result */
*pcomment = cb_data.comment;
jpeg_destroy_decompress(&cinfo);
rewind(fp);
return 0;
}
int
main (int argc, char **argv)
{
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
#ifdef PROGRESS_REPORT
struct cdjpeg_progress_mgr progress;
#endif
int file_index;
djpeg_dest_ptr dest_mgr = NULL;
FILE * input_file;
FILE * output_file;
JDIMENSION num_scanlines;
/* On Mac, fetch a command line. */
#ifdef USE_CCOMMAND
argc = ccommand(&argv);
#endif
progname = argv[0];
if (progname == NULL || progname[0] == 0)
progname = "djpeg"; /* in case C library doesn't provide it */
/* Initialize the JPEG decompression object with default error handling. */
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);
/* Add some application-specific error messages (from cderror.h) */
jerr.addon_message_table = cdjpeg_message_table;
jerr.first_addon_message = JMSG_FIRSTADDONCODE;
jerr.last_addon_message = JMSG_LASTADDONCODE;
/* Insert custom marker processor for COM and APP12.
* APP12 is used by some digital camera makers for textual info,
* so we provide the ability to display it as text.
* If you like, additional APPn marker types can be selected for display,
* but don't try to override APP0 or APP14 this way (see libjpeg.doc).
*/
jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
/* Now safe to enable signal catcher. */
#ifdef NEED_SIGNAL_CATCHER
enable_signal_catcher((j_common_ptr) &cinfo);
#endif
/* Scan command line to find file names. */
/* It is convenient to use just one switch-parsing routine, but the switch
* values read here are ignored; we will rescan the switches after opening
* the input file.
* (Exception: tracing level set here controls verbosity for COM markers
* found during jpeg_read_header...)
*/
file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
#ifdef TWO_FILE_COMMANDLINE
/* Must have either -outfile switch or explicit output file name */
if (outfilename == NULL) {
if (file_index != argc-2) {
fprintf(stderr, "%s: must name one input and one output file\n",
progname);
usage();
}
outfilename = argv[file_index+1];
} else {
if (file_index != argc-1) {
fprintf(stderr, "%s: must name one input and one output file\n",
progname);
usage();
}
}
#else
/* Unix style: expect zero or one file name */
if (file_index < argc-1) {
fprintf(stderr, "%s: only one input file\n", progname);
usage();
}
#endif /* TWO_FILE_COMMANDLINE */
/* Open the input file. */
if (file_index < argc) {
if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
exit(EXIT_FAILURE);
}
} else {
/* default input file is stdin */
input_file = read_stdin();
}
/* Open the output file. */
if (outfilename != NULL) {
if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
exit(EXIT_FAILURE);
}
} else {
/* default output file is stdout */
output_file = write_stdout();
}
#ifdef PROGRESS_REPORT
start_progress_monitor((j_common_ptr) &cinfo, &progress);
#endif
/* Specify data source for decompression */
jpeg_stdio_src(&cinfo, input_file);
/* Read file header, set default decompression parameters */
(void) jpeg_read_header(&cinfo, TRUE);
/* Adjust default decompression parameters by re-parsing the options */
file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
/* Initialize the output module now to let it override any crucial
* option settings (for instance, GIF wants to force color quantization).
*/
switch (requested_fmt) {
#ifdef BMP_SUPPORTED
case FMT_BMP:
dest_mgr = jinit_write_bmp(&cinfo, FALSE);
break;
case FMT_OS2:
dest_mgr = jinit_write_bmp(&cinfo, TRUE);
break;
#endif
#ifdef GIF_SUPPORTED
case FMT_GIF:
dest_mgr = jinit_write_gif(&cinfo);
break;
#endif
#ifdef PPM_SUPPORTED
case FMT_PPM:
dest_mgr = jinit_write_ppm(&cinfo);
break;
#endif
#ifdef RLE_SUPPORTED
case FMT_RLE:
dest_mgr = jinit_write_rle(&cinfo);
break;
#endif
#ifdef TARGA_SUPPORTED
case FMT_TARGA:
dest_mgr = jinit_write_targa(&cinfo);
break;
#endif
default:
ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
break;
}
dest_mgr->output_file = output_file;
/* Start decompressor */
(void) jpeg_start_decompress(&cinfo);
/* Write output file header */
(*dest_mgr->start_output) (&cinfo, dest_mgr);
/* Process data */
while (cinfo.output_scanline < cinfo.output_height) {
num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
dest_mgr->buffer_height);
(*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
}
#ifdef PROGRESS_REPORT
/* Hack: count final pass as done in case finish_output does an extra pass.
* The library won't have updated completed_passes.
*/
progress.pub.completed_passes = progress.pub.total_passes;
#endif
/* Finish decompression and release memory.
* I must do it in this order because output module has allocated memory
* of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
*/
(*dest_mgr->finish_output) (&cinfo, dest_mgr);
(void) jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
/* Close files, if we opened them */
if (input_file != stdin)
fclose(input_file);
if (output_file != stdout)
fclose(output_file);
#ifdef PROGRESS_REPORT
end_progress_monitor((j_common_ptr) &cinfo);
#endif
/* All done. */
exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
return 0; /* suppress no-return-value warnings */
}
int
jpg_open(char *filename)
{
char outbuf[1024];
int i;
struct my_error_mgr jerr;
jpeg_component_info *compptr;
FILE *fin;
comments_init();
jpg_markers = 0;
if ((fin = fopen(filename, "r")) == NULL) {
int error = errno;
fprintf(stderr, "%s : error: %s\n",
filename, strerror(error));
return (-1);
}
jinfo.err = jpeg_std_error(&jerr.pub);
jerr.pub.error_exit = my_error_exit;
if (stego_eoi_cb != NULL)
jerr.pub.emit_message = my_error_emit;
/* Establish the setjmp return context for my_error_exit to use. */
if (setjmp(jerr.setjmp_buffer)) {
/* Always display the message. */
(*jinfo.err->format_message) ((j_common_ptr)&jinfo, outbuf);
fprintf(stderr, "%s : error: %s\n", filename, outbuf);
/* If we get here, the JPEG code has signaled an error.
* We need to clean up the JPEG object, close the input file,
* and return.
*/
jpeg_destroy_decompress(&jinfo);
fclose(fin);
return (-1);
}
jpeg_create_decompress(&jinfo);
jpeg_set_marker_processor(&jinfo, JPEG_COM, comment_handler);
for (i = 1; i < 16; i++)
jpeg_set_marker_processor(&jinfo, JPEG_APP0+i, marker_handler);
jpeg_stdio_src(&jinfo, fin);
jpeg_read_header(&jinfo, TRUE);
/* jinfo.quantize_colors = TRUE; */
dctcoeff = (njvirt_barray_ptr *)jpeg_read_coefficients(&jinfo);
fclose(fin);
if (dctcoeff == NULL) {
fprintf(stderr, "%s : error: can not get coefficients\n",
filename);
goto out;
}
if (jinfo.out_color_space != JCS_RGB) {
fprintf(stderr, "%s : error: is not a RGB image\n", filename);
goto out;
}
i = jinfo.num_components;
if (i != 3) {
fprintf(stderr,
"%s : error: wrong number of color components: %d\n",
filename, i);
goto out;
}
for(i = 0; i < 3; i++) {
compptr = jinfo.cur_comp_info[i];
/*
fprintf(stderr,
"input_iMCU_row: %d, v_samp_factor: %d\n",
jinfo.input_iMCU_row * compptr->v_samp_factor,
(JDIMENSION) compptr->v_samp_factor);
fprintf(stderr, "hib: %d, wib: %d\n",
jinfo.comp_info[i].height_in_blocks,
jinfo.comp_info[i].width_in_blocks);
*/
wib[i] = jinfo.comp_info[i].width_in_blocks;
hib[i] = jinfo.comp_info[i].height_in_blocks;
dctcompbuf[i] = dctcoeff[i]->mem_buffer;
}
return (0);
out:
jpg_destroy();
return (-1);
}
static ImBuf * ibJpegImageFromCinfo(struct jpeg_decompress_struct * cinfo, int flags)
{
JSAMPARRAY row_pointer;
JSAMPLE * buffer = NULL;
int row_stride;
int x, y, depth, r, g, b, k;
struct ImBuf * ibuf = NULL;
uchar * rect;
jpeg_saved_marker_ptr marker;
char *str, *key, *value;
/* install own app1 handler */
ibuf_ftype = 0;
jpeg_set_marker_processor(cinfo, 0xe1, handle_app1);
cinfo->dct_method = JDCT_FLOAT;
jpeg_save_markers(cinfo, JPEG_COM, 0xffff);
if (jpeg_read_header(cinfo, FALSE) == JPEG_HEADER_OK) {
x = cinfo->image_width;
y = cinfo->image_height;
depth = cinfo->num_components;
if (cinfo->jpeg_color_space == JCS_YCCK) cinfo->out_color_space = JCS_CMYK;
jpeg_start_decompress(cinfo);
if (ibuf_ftype == 0) {
ibuf_ftype = JPG_STD;
if (cinfo->max_v_samp_factor == 1) {
if (cinfo->max_h_samp_factor == 1) ibuf_ftype = JPG_MAX;
else ibuf_ftype = JPG_VID;
}
}
if (flags & IB_test) {
jpeg_abort_decompress(cinfo);
ibuf = IMB_allocImBuf(x, y, 8 * depth, 0);
}
else if ((ibuf = IMB_allocImBuf(x, y, 8 * depth, IB_rect)) == NULL) {
jpeg_abort_decompress(cinfo);
}
else {
row_stride = cinfo->output_width * depth;
row_pointer = (*cinfo->mem->alloc_sarray) ((j_common_ptr) cinfo, JPOOL_IMAGE, row_stride, 1);
for (y = ibuf->y - 1; y >= 0; y--) {
jpeg_read_scanlines(cinfo, row_pointer, 1);
rect = (uchar *) (ibuf->rect + y * ibuf->x);
buffer = row_pointer[0];
switch(depth) {
case 1:
for (x=ibuf->x; x >0; x--) {
rect[3] = 255;
rect[0] = rect[1] = rect[2] = *buffer++;
rect += 4;
}
break;
case 3:
for (x=ibuf->x; x >0; x--) {
rect[3] = 255;
rect[0] = *buffer++;
rect[1] = *buffer++;
rect[2] = *buffer++;
rect += 4;
}
break;
case 4:
for (x=ibuf->x; x >0; x--) {
r = *buffer++;
g = *buffer++;
b = *buffer++;
k = *buffer++;
k = 255 - k;
r -= k;
if (r & 0xffffff00) {
if (r < 0) r = 0;
else r = 255;
}
g -= k;
if (g & 0xffffff00) {
if (g < 0) g = 0;
else g = 255;
}
b -= k;
if (b & 0xffffff00) {
if (b < 0) b = 0;
else b = 255;
}
rect[3] = 255 - k;
rect[2] = b;
rect[1] = g;
rect[0] = r;
rect += 4;
}
}
}
marker= cinfo->marker_list;
while(marker) {
if(marker->marker != JPEG_COM)
goto next_stamp_marker;
/*
* Because JPEG format don't support the
* pair "key/value" like PNG, we store the
* stampinfo in a single "encode" string:
* "Blender:key:value"
*
* That is why we need split it to the
* common key/value here.
*/
if(strncmp((char *) marker->data, "Blender", 7)) {
/*
* Maybe the file have text that
* we don't know "what it's", in that
* case we keep the text (with a
* key "None").
* This is only for don't "lose"
* the information when we write
* it back to disk.
*/
IMB_metadata_add_field(ibuf, "None", (char *) marker->data);
ibuf->flags |= IB_metadata;
goto next_stamp_marker;
}
str = BLI_strdup ((char *) marker->data);
key = strchr (str, ':');
/*
* A little paranoid, but the file maybe
* is broken... and a "extra" check is better
* that a segfaul ;)
*/
if (!key) {
MEM_freeN(str);
goto next_stamp_marker;
}
key++;
value = strchr (key, ':');
if (!value) {
MEM_freeN(str);
goto next_stamp_marker;
}
*value = '\0'; /* need finish the key string */
value++;
IMB_metadata_add_field(ibuf, key, value);
ibuf->flags |= IB_metadata;
MEM_freeN(str);
next_stamp_marker:
marker= marker->next;
}
jpeg_finish_decompress(cinfo);
}
jpeg_destroy((j_common_ptr) cinfo);
if(ibuf) {
ibuf->ftype = ibuf_ftype;
ibuf->profile = IB_PROFILE_SRGB;
}
}
return(ibuf);
}
process_one_file (int argc, char **argv, int old_file_index)
{
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
char *infilename;
char workfilename[PATH_MAX];
const char *default_extension = NULL;
#ifdef PROGRESS_REPORT
struct cdjpeg_progress_mgr progress;
#endif
int file_index;
djpeg_dest_ptr dest_mgr = NULL;
FILE * input_file = NULL;
FILE * output_file = NULL;
JDIMENSION num_scanlines;
/* Initialize the JPEG decompression object with default error handling. */
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);
/* Add some application-specific error messages (from cderror.h) */
jerr.addon_message_table = cdjpeg_message_table;
jerr.first_addon_message = JMSG_FIRSTADDONCODE;
jerr.last_addon_message = JMSG_LASTADDONCODE;
/* Insert custom marker processor for COM and APP12.
* APP12 is used by some digital camera makers for textual info,
* so we provide the ability to display it as text.
* If you like, additional APPn marker types can be selected for display,
* but don't try to override APP0 or APP14 this way (see libjpeg.doc).
*/
jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
/* Now safe to enable signal catcher. */
#ifdef NEED_SIGNAL_CATCHER
enable_signal_catcher((j_common_ptr) &cinfo);
#endif
/* Scan command line to find next file name.
* It is convenient to use just one switch-parsing routine, but the switch
* values read here are ignored; we will rescan the switches after opening
* the input file.
* (Exception: tracing level set here controls verbosity for COM markers
* found during jpeg_read_header...)
*/
file_index = parse_switches(&cinfo, argc, argv, old_file_index, FALSE);
if (file_index >= argc) {
fprintf(stderr, "%s: missing input file name\n", progname);
usage();
}
/* Open the input file. */
infilename = argv[file_index];
if ((input_file = fopen(infilename, READ_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, infilename);
goto fail;
}
#ifdef PROGRESS_REPORT
start_progress_monitor((j_common_ptr) &cinfo, &progress);
#endif
/* Specify data source for decompression */
jpeg_stdio_src(&cinfo, input_file);
/* Read file header, set default decompression parameters */
(void) jpeg_read_header(&cinfo, TRUE);
/* Adjust default decompression parameters by re-parsing the options */
file_index = parse_switches(&cinfo, argc, argv, old_file_index, TRUE);
/* Initialize the output module now to let it override any crucial
* option settings (for instance, GIF wants to force color quantization).
*/
switch (requested_fmt) {
#ifdef BMP_SUPPORTED
case FMT_BMP:
dest_mgr = jinit_write_bmp(&cinfo, FALSE);
default_extension = ".bmp";
break;
case FMT_OS2:
dest_mgr = jinit_write_bmp(&cinfo, TRUE);
default_extension = ".bmp";
break;
#endif
#ifdef GIF_SUPPORTED
case FMT_GIF:
dest_mgr = jinit_write_gif(&cinfo);
default_extension = ".gif";
break;
#endif
#ifdef PPM_SUPPORTED
case FMT_PPM:
dest_mgr = jinit_write_ppm(&cinfo);
default_extension = ".ppm";
break;
#endif
#ifdef RLE_SUPPORTED
case FMT_RLE:
dest_mgr = jinit_write_rle(&cinfo);
default_extension = ".rle";
break;
#endif
#ifdef TARGA_SUPPORTED
case FMT_TARGA:
dest_mgr = jinit_write_targa(&cinfo);
default_extension = ".tga";
break;
#endif
default:
ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
break;
}
/* If user didn't supply -outfile switch, select output file name. */
if (outfilename == NULL) {
int i;
outfilename = workfilename;
/* Make outfilename be infilename with appropriate extension */
strcpy(outfilename, infilename);
for (i = strlen(outfilename)-1; i >= 0; i--) {
switch (outfilename[i]) {
case ':':
case '/':
case '\\':
i = 0; /* stop scanning */
break;
case '.':
outfilename[i] = '\0'; /* lop off existing extension */
i = 0; /* stop scanning */
break;
default:
break; /* keep scanning */
}
}
strcat(outfilename, default_extension);
}
fprintf(stderr, "Decompressing %s => %s\n", infilename, outfilename);
#ifndef NO_OVERWRITE_CHECK
if (! is_write_ok(outfilename))
goto fail;
#endif
/* Open the output file. */
if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
fprintf(stderr, "%s: can't create %s\n", progname, outfilename);
goto fail;
}
dest_mgr->output_file = output_file;
/* Start decompressor */
(void) jpeg_start_decompress(&cinfo);
/* Write output file header */
(*dest_mgr->start_output) (&cinfo, dest_mgr);
/* Process data */
while (cinfo.output_scanline < cinfo.output_height) {
num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
dest_mgr->buffer_height);
(*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
}
#ifdef PROGRESS_REPORT
/* Hack: count final pass as done in case finish_output does an extra pass.
* The library won't have updated completed_passes.
*/
progress.pub.completed_passes = progress.pub.total_passes;
#endif
/* Finish decompression and release memory.
* I must do it in this order because output module has allocated memory
* of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
*/
(*dest_mgr->finish_output) (&cinfo, dest_mgr);
(void) jpeg_finish_decompress(&cinfo);
/* Clean up and exit */
fail:
jpeg_destroy_decompress(&cinfo);
if (input_file != NULL) fclose(input_file);
if (output_file != NULL) fclose(output_file);
#ifdef PROGRESS_REPORT
end_progress_monitor((j_common_ptr) &cinfo);
#endif
/* Disable signal catcher. */
#ifdef NEED_SIGNAL_CATCHER
enable_signal_catcher((j_common_ptr) NULL);
#endif
return file_index;
}
int djpeg (char *inbuf,int inbuflen,unsigned char **ppout)
{
struct jpeg_decompress_struct cinfo ;
struct jpeg_error_mgr jerr ;
djpeg_dest_ptr dest_mgr = NULL;
JDIMENSION num_scanlines;
if (ppout == NULL) return -1;
*ppout = NULL;
/* Initialize the JPEG decompression object with default error handling. */
cinfo.err = jpeg_std_error(&jerr);
cinfo.err->error_exit = My_Error_Exit;
jpeg_create_decompress(&cinfo);
/* Add some application-specific error messages (from cderror.h) */
jerr.addon_message_table = cdjpeg_message_table;
jerr.first_addon_message = JMSG_FIRSTADDONCODE;
jerr.last_addon_message = JMSG_LASTADDONCODE;
/* Insert custom marker processor for COM and APP12.
* APP12 is used by some digital camera makers for textual info,
* so we provide the ability to display it as text.
* If you like, additional APPn marker types can be selected for display,
* but don't try to override APP0 or APP14 this way (see libjpeg.doc).
*/
jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
set_cinfo(&cinfo);
Jpeg_Memory_Src(&cinfo, inbuf, inbuflen);
/* Read file header, set default decompression parameters */
(void) jpeg_read_header(&cinfo, TRUE);
/* Adjust default decompression parameters by re-parsing the options */
set_cinfo(&cinfo);
/* Initialize the output module now to let it override any crucial
* option settings (for instance, GIF wants to force color quantization).
*/
dest_mgr = jinit_write_bmp(&cinfo, FALSE);
/* Start decompressor */
(void) jpeg_start_decompress(&cinfo);
/* Write output file header */
(*dest_mgr->start_output) (&cinfo, dest_mgr);
/* Process data */
while (cinfo.output_scanline < cinfo.output_height) {
num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
dest_mgr->buffer_height);
(*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
}
/* Finish decompression and release memory.
* I must do it in this order because output module has allocated memory
* of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
*/
put_gray_to_buff(&cinfo,dest_mgr,ppout); //toview
(void) jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
return 0;
}
/*!
* pixReadStreamJpeg()
*
* Input: stream
* colormap flag (0 means return RGB image if color;
* 1 means create colormap and return 8 bpp
* palette image if color)
* reduction (scaling factor: 1, 2, 4 or 8)
* &pnwarn (<optional return> number of warnings)
* hint: (a bitwise OR of L_HINT_* values); use 0 for no hints
* Return: pix, or null on error
*
* Usage: see pixReadJpeg()
*/
PIX *
pixReadStreamJpeg(FILE *fp,
l_int32 cmflag,
l_int32 reduction,
l_int32 *pnwarn,
l_int32 hint)
{
l_uint8 cyan, yellow, magenta, black, white;
l_int32 rval, gval, bval;
l_int32 i, j, k;
l_int32 w, h, wpl, spp, ncolors, cindex, ycck, cmyk;
l_uint32 *data;
l_uint32 *line, *ppixel;
JSAMPROW rowbuffer;
PIX *pix;
PIXCMAP *cmap;
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
l_uint8 *comment = NULL;
PROCNAME("pixReadStreamJpeg");
if (!fp)
return (PIX *)ERROR_PTR("fp not defined", procName, NULL);
if (pnwarn)
*pnwarn = 0; /* init */
if (cmflag != 0 && cmflag != 1)
cmflag = 0; /* default */
if (reduction != 1 && reduction != 2 && reduction != 4 && reduction != 8)
return (PIX *)ERROR_PTR("reduction not in {1,2,4,8}", procName, NULL);
if (BITS_IN_JSAMPLE != 8) /* set in jmorecfg.h */
return (PIX *)ERROR_PTR("BITS_IN_JSAMPLE != 8", procName, NULL);
rewind(fp);
pix = NULL; /* init */
if (setjmp(jpeg_jmpbuf)) {
pixDestroy(&pix);
FREE(rowbuffer);
return (PIX *)ERROR_PTR("internal jpeg error", procName, NULL);
}
rowbuffer = NULL;
cinfo.err = jpeg_std_error(&jerr);
jerr.error_exit = jpeg_error_do_not_exit; /* catch error; do not exit! */
jpeg_create_decompress(&cinfo);
cinfo.client_data = &comment;
jpeg_set_marker_processor(&cinfo, JPEG_COM, jpeg_comment_callback);
jpeg_stdio_src(&cinfo, fp);
jpeg_read_header(&cinfo, TRUE);
cinfo.scale_denom = reduction;
cinfo.scale_num = 1;
if (hint & L_HINT_GRAY)
cinfo.out_color_space = JCS_GRAYSCALE;
jpeg_calc_output_dimensions(&cinfo);
/* Allocate the image and a row buffer */
spp = cinfo.out_color_components;
w = cinfo.output_width;
h = cinfo.output_height;
ycck = (cinfo.jpeg_color_space == JCS_YCCK && spp == 4 && cmflag == 0);
cmyk = (cinfo.jpeg_color_space == JCS_CMYK && spp == 4 && cmflag == 0);
if (spp != 1 && spp != 3 && !ycck && !cmyk) {
if (comment) FREE(comment);
return (PIX *)ERROR_PTR("spp must be 1 or 3, or YCCK or CMYK",
procName, NULL);
}
if ((spp == 3 && cmflag == 0) || ycck || cmyk) { /* rgb or 4 bpp color */
rowbuffer = (JSAMPROW)CALLOC(sizeof(JSAMPLE), spp * w);
pix = pixCreate(w, h, 32);
}
else { /* 8 bpp gray or colormapped */
rowbuffer = (JSAMPROW)CALLOC(sizeof(JSAMPLE), w);
pix = pixCreate(w, h, 8);
}
if (!rowbuffer || !pix) {
if (comment) FREE(comment);
if (rowbuffer) FREE(rowbuffer);
pixDestroy(&pix);
return (PIX *)ERROR_PTR("rowbuffer or pix not made", procName, NULL);
}
if (comment) {
pixSetText(pix, (char *)comment);
FREE(comment);
}
if (spp == 1) /* Grayscale or colormapped */
jpeg_start_decompress(&cinfo);
else { /* Color; spp == 3 or YCCK or CMYK */
if (cmflag == 0) { /* -- 24 bit color in 32 bit pix or YCCK/CMYK -- */
cinfo.quantize_colors = FALSE;
jpeg_start_decompress(&cinfo);
}
else { /* Color quantize to 8 bits */
cinfo.quantize_colors = TRUE;
cinfo.desired_number_of_colors = 256;
jpeg_start_decompress(&cinfo);
/* Construct a pix cmap */
cmap = pixcmapCreate(8);
ncolors = cinfo.actual_number_of_colors;
for (cindex = 0; cindex < ncolors; cindex++)
{
rval = cinfo.colormap[0][cindex];
gval = cinfo.colormap[1][cindex];
bval = cinfo.colormap[2][cindex];
pixcmapAddColor(cmap, rval, gval, bval);
}
pixSetColormap(pix, cmap);
}
}
wpl = pixGetWpl(pix);
data = pixGetData(pix);
/* Decompress */
if ((spp == 3 && cmflag == 0) || ycck || cmyk) { /* -- 24 bit color -- */
for (i = 0; i < h; i++) {
if (jpeg_read_scanlines(&cinfo, &rowbuffer, (JDIMENSION)1) != 1)
return (PIX *)ERROR_PTR("bad read scanline", procName, NULL);
ppixel = data + i * wpl;
if (spp == 3) {
for (j = k = 0; j < w; j++) {
SET_DATA_BYTE(ppixel, COLOR_RED, rowbuffer[k++]);
SET_DATA_BYTE(ppixel, COLOR_GREEN, rowbuffer[k++]);
SET_DATA_BYTE(ppixel, COLOR_BLUE, rowbuffer[k++]);
ppixel++;
}
} else {
/* This is a conversion from CMYK -> RGB that ignores
color profiles, and is invoked when the image header
claims to be in CMYK or YCCK colorspace. If in YCCK,
libjpeg may be doing YCCK -> CMYK under the hood.
To understand why the colors are inverted on read-in,
see the "Special color spaces" section of
"Using the IJG JPEG Library" by Thomas G. Lane. */
for (j = k = 0; j < w; j++) {
cyan = 255 - rowbuffer[k++];
magenta = 255 - rowbuffer[k++];
yellow = 255 - rowbuffer[k++];
white = rowbuffer[k++];
black = 255 - white;
rval = 255 - (cyan * white) / 255 - black;
gval = 255 - (magenta * white) / 255 - black;
bval = 255 - (yellow * white) / 255 - black;
rval = L_MIN(L_MAX(rval, 0), 255);
gval = L_MIN(L_MAX(gval, 0), 255);
bval = L_MIN(L_MAX(bval, 0), 255);
composeRGBPixel(rval, gval, bval, ppixel);
ppixel++;
}
}
}
}
else { /* 8 bpp grayscale or colormapped pix */
for (i = 0; i < h; i++) {
if (jpeg_read_scanlines(&cinfo, &rowbuffer, (JDIMENSION)1) != 1)
return (PIX *)ERROR_PTR("bad read scanline", procName, NULL);
line = data + i * wpl;
for (j = 0; j < w; j++)
SET_DATA_BYTE(line, j, rowbuffer[j]);
}
}
if (pnwarn)
*pnwarn = cinfo.err->num_warnings;
switch (cinfo.density_unit)
{
case 1: /* pixels per inch */
pixSetXRes(pix, cinfo.X_density);
pixSetYRes(pix, cinfo.Y_density);
break;
case 2: /* pixels per centimeter */
pixSetXRes(pix, (l_int32)((l_float32)cinfo.X_density * 2.54 + 0.5));
pixSetYRes(pix, (l_int32)((l_float32)cinfo.Y_density * 2.54 + 0.5));
break;
default: /* the pixel density may not be defined; ignore */
break;
}
jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
FREE(rowbuffer);
return pix;
}
static ImBuf *ibJpegImageFromCinfo(struct jpeg_decompress_struct *cinfo, int flags)
{
JSAMPARRAY row_pointer;
JSAMPLE *buffer = NULL;
int row_stride;
int x, y, depth, r, g, b, k;
struct ImBuf *ibuf = NULL;
uchar *rect;
jpeg_saved_marker_ptr marker;
char *str, *key, *value;
/* install own app1 handler */
ibuf_quality = jpeg_default_quality;
jpeg_set_marker_processor(cinfo, 0xe1, handle_app1);
cinfo->dct_method = JDCT_FLOAT;
jpeg_save_markers(cinfo, JPEG_COM, 0xffff);
if (jpeg_read_header(cinfo, false) == JPEG_HEADER_OK) {
x = cinfo->image_width;
y = cinfo->image_height;
depth = cinfo->num_components;
if (cinfo->jpeg_color_space == JCS_YCCK) cinfo->out_color_space = JCS_CMYK;
jpeg_start_decompress(cinfo);
if (flags & IB_test) {
jpeg_abort_decompress(cinfo);
ibuf = IMB_allocImBuf(x, y, 8 * depth, 0);
}
else if ((ibuf = IMB_allocImBuf(x, y, 8 * depth, IB_rect)) == NULL) {
jpeg_abort_decompress(cinfo);
}
else {
row_stride = cinfo->output_width * depth;
row_pointer = (*cinfo->mem->alloc_sarray)((j_common_ptr) cinfo, JPOOL_IMAGE, row_stride, 1);
for (y = ibuf->y - 1; y >= 0; y--) {
jpeg_read_scanlines(cinfo, row_pointer, 1);
rect = (uchar *) (ibuf->rect + y * ibuf->x);
buffer = row_pointer[0];
switch (depth) {
case 1:
for (x = ibuf->x; x > 0; x--) {
rect[3] = 255;
rect[0] = rect[1] = rect[2] = *buffer++;
rect += 4;
}
break;
case 3:
for (x = ibuf->x; x > 0; x--) {
rect[3] = 255;
rect[0] = *buffer++;
rect[1] = *buffer++;
rect[2] = *buffer++;
rect += 4;
}
break;
case 4:
for (x = ibuf->x; x > 0; x--) {
r = *buffer++;
g = *buffer++;
b = *buffer++;
k = *buffer++;
r = (r * k) / 255;
g = (g * k) / 255;
b = (b * k) / 255;
rect[3] = 255;
rect[2] = b;
rect[1] = g;
rect[0] = r;
rect += 4;
}
break;
}
}
marker = cinfo->marker_list;
while (marker) {
if (marker->marker != JPEG_COM)
goto next_stamp_marker;
/*
* JPEG marker strings are not null-terminated,
* create a null-terminated copy before going further
*/
str = BLI_strdupn((char *)marker->data, marker->data_length);
/*
* Because JPEG format don't support the
* pair "key/value" like PNG, we store the
* stampinfo in a single "encode" string:
* "Blender:key:value"
*
* That is why we need split it to the
* common key/value here.
*/
if (!STREQLEN(str, "Blender", 7)) {
/*
* Maybe the file have text that
* we don't know "what it's", in that
* case we keep the text (with a
* key "None").
* This is only for don't "lose"
* the information when we write
* it back to disk.
*/
IMB_metadata_ensure(&ibuf->metadata);
IMB_metadata_set_field(ibuf->metadata, "None", str);
ibuf->flags |= IB_metadata;
MEM_freeN(str);
goto next_stamp_marker;
}
key = strchr(str, ':');
/*
* A little paranoid, but the file maybe
* is broken... and a "extra" check is better
* then segfault ;)
*/
if (!key) {
MEM_freeN(str);
goto next_stamp_marker;
}
key++;
value = strchr(key, ':');
if (!value) {
MEM_freeN(str);
goto next_stamp_marker;
}
*value = '\0'; /* need finish the key string */
value++;
IMB_metadata_ensure(&ibuf->metadata);
IMB_metadata_set_field(ibuf->metadata, key, value);
ibuf->flags |= IB_metadata;
MEM_freeN(str);
next_stamp_marker:
marker = marker->next;
}
jpeg_finish_decompress(cinfo);
}
jpeg_destroy((j_common_ptr) cinfo);
if (ibuf) {
ibuf->ftype = IMB_FTYPE_JPG;
ibuf->foptions.quality = MIN2(ibuf_quality, 100);
}
}
return(ibuf);
}
CPLErr JPEG_Codec::DecompressJPEG(buf_mgr &dst, buf_mgr &isrc)
#endif
{
int nbands = img.pagesize.c;
// Locals, clean up after themselves
jpeg_decompress_struct cinfo;
MRFJPEGStruct sJPEGStruct;
struct jpeg_error_mgr sJErr;
BitMask mask(img.pagesize.x, img.pagesize.y);
RLEC3Packer packer;
mask.set_packer(&packer);
memset(&cinfo, 0, sizeof(cinfo));
// Pass the mask address to the decompressor
sJPEGStruct.mask = &mask;
struct jpeg_source_mgr src;
cinfo.err = jpeg_std_error( &sJErr );
sJErr.error_exit = errorExit;
sJErr.emit_message = emitMessage;
cinfo.client_data = (void *) &(sJPEGStruct);
src.next_input_byte = (JOCTET *)isrc.buffer;
src.bytes_in_buffer = isrc.size;
src.term_source = stub_source_dec;
src.init_source = stub_source_dec;
src.skip_input_data = skip_input_data_dec;
src.fill_input_buffer = fill_input_buffer_dec;
src.resync_to_restart = jpeg_resync_to_restart;
jpeg_create_decompress(&cinfo);
if (setjmp(sJPEGStruct.setjmpBuffer)) {
CPLError(CE_Failure, CPLE_AppDefined, "MRF: Error reading JPEG page");
jpeg_destroy_decompress(&cinfo);
return CE_Failure;
}
cinfo.src = &src;
jpeg_set_marker_processor(&cinfo, JPEG_APP0 + 3, MaskProcessor);
jpeg_read_header(&cinfo, TRUE);
/* In some cases, libjpeg needs to allocate a lot of memory */
/* http://www.libjpeg-turbo.org/pmwiki/uploads/About/TwoIssueswiththeJPEGStandard.pdf */
if( jpeg_has_multiple_scans(&(cinfo)) )
{
/* In this case libjpeg will need to allocate memory or backing */
/* store for all coefficients */
/* See call to jinit_d_coef_controller() from master_selection() */
/* in libjpeg */
vsi_l_offset nRequiredMemory =
static_cast<vsi_l_offset>(cinfo.image_width) *
cinfo.image_height * cinfo.num_components *
((cinfo.data_precision+7)/8);
/* BLOCK_SMOOTHING_SUPPORTED is generally defined, so we need */
/* to replicate the logic of jinit_d_coef_controller() */
if( cinfo.progressive_mode )
nRequiredMemory *= 3;
#ifndef GDAL_LIBJPEG_LARGEST_MEM_ALLOC
#define GDAL_LIBJPEG_LARGEST_MEM_ALLOC (100 * 1024 * 1024)
#endif
if( nRequiredMemory > GDAL_LIBJPEG_LARGEST_MEM_ALLOC &&
CPLGetConfigOption("GDAL_ALLOW_LARGE_LIBJPEG_MEM_ALLOC", nullptr) == nullptr )
{
CPLError(CE_Failure, CPLE_NotSupported,
"Reading this image would require libjpeg to allocate "
"at least " CPL_FRMT_GUIB " bytes. "
"This is disabled since above the " CPL_FRMT_GUIB " threshold. "
"You may override this restriction by defining the "
"GDAL_ALLOW_LARGE_LIBJPEG_MEM_ALLOC environment variable, "
"or recompile GDAL by defining the "
"GDAL_LIBJPEG_LARGEST_MEM_ALLOC macro to a value greater "
"than " CPL_FRMT_GUIB,
static_cast<GUIntBig>(nRequiredMemory),
static_cast<GUIntBig>(GDAL_LIBJPEG_LARGEST_MEM_ALLOC),
static_cast<GUIntBig>(GDAL_LIBJPEG_LARGEST_MEM_ALLOC));
jpeg_destroy_decompress(&cinfo);
return CE_Failure;
}
}
// Use float, it is actually faster than the ISLOW method by a tiny bit
cinfo.dct_method = JDCT_FLOAT;
//
// Tolerate different input if we can do the conversion
// Gray and RGB for example
// This also means that a RGB MRF can be read as grayscale and vice versa
// If libJPEG can't convert it will throw an error
//
if (nbands == 3 && cinfo.num_components != nbands)
cinfo.out_color_space = JCS_RGB;
if (nbands == 1 && cinfo.num_components != nbands)
cinfo.out_color_space = JCS_GRAYSCALE;
const int datasize = ((cinfo.data_precision == 8) ? 1 : 2);
if( cinfo.image_width > static_cast<unsigned>(INT_MAX / (nbands * datasize)) )
{
CPLError(CE_Failure, CPLE_AppDefined, "MRF: JPEG decompress buffer overflow");
jpeg_destroy_decompress(&cinfo);
return CE_Failure;
}
int linesize = cinfo.image_width * nbands * datasize;
// We have a mismatch between the real and the declared data format
// warn and fail if output buffer is too small
if (linesize > static_cast<int>(INT_MAX / cinfo.image_height)) {
CPLError(CE_Failure, CPLE_AppDefined, "MRF: JPEG decompress buffer overflow");
jpeg_destroy_decompress(&cinfo);
return CE_Failure;
}
if (linesize*cinfo.image_height != dst.size) {
CPLError(CE_Warning, CPLE_AppDefined, "MRF: read JPEG size is wrong");
if (linesize*cinfo.image_height > dst.size) {
CPLError(CE_Failure, CPLE_AppDefined, "MRF: JPEG decompress buffer overflow");
jpeg_destroy_decompress(&cinfo);
return CE_Failure;
}
}
struct jpeg_progress_mgr sJProgress;
sJProgress.progress_monitor = ProgressMonitor;
cinfo.progress = &sJProgress;
jpeg_start_decompress(&cinfo);
// Decompress, two lines at a time is what libjpeg does
while (cinfo.output_scanline < cinfo.image_height) {
char *rp[2];
rp[0] = (char *)dst.buffer + linesize*cinfo.output_scanline;
rp[1] = rp[0] + linesize;
// if this fails, it calls the error handler
// which will report an error
if( jpeg_read_scanlines(&cinfo, JSAMPARRAY(rp), 2) == 0 )
{
jpeg_destroy_decompress(&cinfo);
return CE_Failure;
}
}
jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
// Apply the mask
if (datasize == 1)
apply_mask(sJPEGStruct, reinterpret_cast<char *>(dst.buffer), img.pagesize.c);
else
apply_mask(sJPEGStruct, reinterpret_cast<GUInt16 *>(dst.buffer), img.pagesize.c);
return CE_None;
}
int
main (int argc, char **argv)
{
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
#ifdef PROGRESS_REPORT
struct cdjpeg_progress_mgr progress;
#endif
int file_index;
djpeg_dest_ptr dest_mgr = NULL;
FILE * input_file;
FILE * output_file;
unsigned char *inbuffer = NULL;
unsigned long insize = 0;
JDIMENSION num_scanlines;
/* On Mac, fetch a command line. */
#ifdef USE_CCOMMAND
argc = ccommand(&argv);
#endif
progname = argv[0];
if (progname == NULL || progname[0] == 0)
progname = "djpeg"; /* in case C library doesn't provide it */
/* Initialize the JPEG decompression object with default error handling. */
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);
/* Add some application-specific error messages (from cderror.h) */
jerr.addon_message_table = cdjpeg_message_table;
jerr.first_addon_message = JMSG_FIRSTADDONCODE;
jerr.last_addon_message = JMSG_LASTADDONCODE;
/* Insert custom marker processor for COM and APP12.
* APP12 is used by some digital camera makers for textual info,
* so we provide the ability to display it as text.
* If you like, additional APPn marker types can be selected for display,
* but don't try to override APP0 or APP14 this way (see libjpeg.txt).
*/
jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
/* Scan command line to find file names. */
/* It is convenient to use just one switch-parsing routine, but the switch
* values read here are ignored; we will rescan the switches after opening
* the input file.
* (Exception: tracing level set here controls verbosity for COM markers
* found during jpeg_read_header...)
*/
file_index = parse_switches(&cinfo, argc, argv, 0, FALSE);
#ifdef TWO_FILE_COMMANDLINE
/* Must have either -outfile switch or explicit output file name */
if (outfilename == NULL) {
if (file_index != argc-2) {
fprintf(stderr, "%s: must name one input and one output file\n",
progname);
usage();
}
outfilename = argv[file_index+1];
} else {
if (file_index != argc-1) {
fprintf(stderr, "%s: must name one input and one output file\n",
progname);
usage();
}
}
#else
/* Unix style: expect zero or one file name */
if (file_index < argc-1) {
fprintf(stderr, "%s: only one input file\n", progname);
usage();
}
#endif /* TWO_FILE_COMMANDLINE */
/* Open the input file. */
if (file_index < argc) {
if ((input_file = fopen(argv[file_index], READ_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, argv[file_index]);
exit(EXIT_FAILURE);
}
} else {
/* default input file is stdin */
input_file = read_stdin();
}
/* Open the output file. */
if (outfilename != NULL) {
if ((output_file = fopen(outfilename, WRITE_BINARY)) == NULL) {
fprintf(stderr, "%s: can't open %s\n", progname, outfilename);
exit(EXIT_FAILURE);
}
} else {
/* default output file is stdout */
output_file = write_stdout();
}
#ifdef PROGRESS_REPORT
start_progress_monitor((j_common_ptr) &cinfo, &progress);
#endif
/* Specify data source for decompression */
#if JPEG_LIB_VERSION >= 80 || defined(MEM_SRCDST_SUPPORTED)
if (memsrc) {
size_t nbytes;
do {
inbuffer = (unsigned char *)realloc(inbuffer, insize + INPUT_BUF_SIZE);
if (inbuffer == NULL) {
fprintf(stderr, "%s: memory allocation failure\n", progname);
exit(EXIT_FAILURE);
}
nbytes = JFREAD(input_file, &inbuffer[insize], INPUT_BUF_SIZE);
if (nbytes < INPUT_BUF_SIZE && ferror(input_file)) {
if (file_index < argc)
fprintf(stderr, "%s: can't read from %s\n", progname,
argv[file_index]);
else
fprintf(stderr, "%s: can't read from stdin\n", progname);
}
insize += (unsigned long)nbytes;
} while (nbytes == INPUT_BUF_SIZE);
fprintf(stderr, "Compressed size: %lu bytes\n", insize);
jpeg_mem_src(&cinfo, inbuffer, insize);
} else
#endif
jpeg_stdio_src(&cinfo, input_file);
/* Read file header, set default decompression parameters */
(void) jpeg_read_header(&cinfo, TRUE);
/* Adjust default decompression parameters by re-parsing the options */
file_index = parse_switches(&cinfo, argc, argv, 0, TRUE);
/* Initialize the output module now to let it override any crucial
* option settings (for instance, GIF wants to force color quantization).
*/
switch (requested_fmt) {
#ifdef BMP_SUPPORTED
case FMT_BMP:
dest_mgr = jinit_write_bmp(&cinfo, FALSE);
break;
case FMT_OS2:
dest_mgr = jinit_write_bmp(&cinfo, TRUE);
break;
#endif
#ifdef GIF_SUPPORTED
case FMT_GIF:
dest_mgr = jinit_write_gif(&cinfo);
break;
#endif
#ifdef PPM_SUPPORTED
case FMT_PPM:
dest_mgr = jinit_write_ppm(&cinfo);
break;
#endif
#ifdef RLE_SUPPORTED
case FMT_RLE:
dest_mgr = jinit_write_rle(&cinfo);
break;
#endif
#ifdef TARGA_SUPPORTED
case FMT_TARGA:
dest_mgr = jinit_write_targa(&cinfo);
break;
#endif
default:
ERREXIT(&cinfo, JERR_UNSUPPORTED_FORMAT);
break;
}
dest_mgr->output_file = output_file;
/* Start decompressor */
(void) jpeg_start_decompress(&cinfo);
/* Strip decode */
if (strip || skip) {
JDIMENSION tmp;
/* Check for valid endY. We cannot check this value until after
* jpeg_start_decompress() is called. Note that we have already verified
* that startY <= endY.
*/
if (endY > cinfo.output_height - 1) {
fprintf(stderr, "%s: strip %d-%d exceeds image height %d\n", progname,
startY, endY, cinfo.output_height);
exit(EXIT_FAILURE);
}
/* Write output file header. This is a hack to ensure that the destination
* manager creates an image of the proper size for the partial decode.
*/
tmp = cinfo.output_height;
cinfo.output_height = endY - startY + 1;
if (skip)
cinfo.output_height = tmp - cinfo.output_height;
(*dest_mgr->start_output) (&cinfo, dest_mgr);
cinfo.output_height = tmp;
/* Process data */
if (skip) {
while (cinfo.output_scanline < startY) {
num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
dest_mgr->buffer_height);
(*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
}
jpeg_skip_scanlines(&cinfo, endY - startY + 1);
while (cinfo.output_scanline < cinfo.output_height) {
num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
dest_mgr->buffer_height);
(*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
}
} else {
jpeg_skip_scanlines(&cinfo, startY);
while (cinfo.output_scanline <= endY) {
num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
dest_mgr->buffer_height);
(*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
}
jpeg_skip_scanlines(&cinfo, cinfo.output_height - endY + 1);
}
/* Normal full image decode */
} else {
/* Write output file header */
(*dest_mgr->start_output) (&cinfo, dest_mgr);
/* Process data */
while (cinfo.output_scanline < cinfo.output_height) {
num_scanlines = jpeg_read_scanlines(&cinfo, dest_mgr->buffer,
dest_mgr->buffer_height);
(*dest_mgr->put_pixel_rows) (&cinfo, dest_mgr, num_scanlines);
}
}
#ifdef PROGRESS_REPORT
/* Hack: count final pass as done in case finish_output does an extra pass.
* The library won't have updated completed_passes.
*/
progress.pub.completed_passes = progress.pub.total_passes;
#endif
/* Finish decompression and release memory.
* I must do it in this order because output module has allocated memory
* of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
*/
(*dest_mgr->finish_output) (&cinfo, dest_mgr);
(void) jpeg_finish_decompress(&cinfo);
jpeg_destroy_decompress(&cinfo);
/* Close files, if we opened them */
if (input_file != stdin)
fclose(input_file);
if (output_file != stdout)
fclose(output_file);
#ifdef PROGRESS_REPORT
end_progress_monitor((j_common_ptr) &cinfo);
#endif
if (memsrc && inbuffer != NULL)
free(inbuffer);
/* All done. */
exit(jerr.num_warnings ? EXIT_WARNING : EXIT_SUCCESS);
return 0; /* suppress no-return-value warnings */
}
bool LoadJPEG(ACanvas *pC, const char *filename, ACanvas *pC1)
{
struct jpeg_decompress_struct cinfo;
struct jpeg_error_mgr jerr;
JDIMENSION l, x, y, num_scanlines;
AStdFile file;
bool success = false;
/* Initialize the JPEG decompression object with default error handling. */
cinfo.err = jpeg_std_error(&jerr);
jpeg_create_decompress(&cinfo);
#if 0
/* Add some application-specific error messages (from cderror.h) */
jerr.addon_message_table = cdjpeg_message_table;
jerr.first_addon_message = JMSG_FIRSTADDONCODE;
jerr.last_addon_message = JMSG_LASTADDONCODE;
/* Insert custom marker processor for COM and APP12.
* APP12 is used by some digital camera makers for textual info,
* so we provide the ability to display it as text.
* If you like, additional APPn marker types can be selected for display,
* but don't try to override APP0 or APP14 this way (see libjpeg.doc).
*/
jpeg_set_marker_processor(&cinfo, JPEG_COM, print_text_marker);
jpeg_set_marker_processor(&cinfo, JPEG_APP0+12, print_text_marker);
#endif
if (file.open(filename, "rb")) {
/* Specify data source for decompression */
jpeg_stdio_src(&cinfo, file.GetFile());
/* Read file header, set default decompression parameters */
(void) jpeg_read_header(&cinfo, true);
jpeg_start_decompress(&cinfo);
if (!pC->Valid() || (pC->GetWidth() != (sint_t)cinfo.output_width) || (pC->GetHeight() != (sint_t)cinfo.output_height)) {
pC->Delete();
pC->CreateCompatibleDC(pC1);
pC->CreateCompatibleBitmap(pC1, cinfo.output_width, cinfo.output_height);
}
if (pC->Valid()) {
JSAMPLE *buffer;
if ((buffer = new JSAMPLE[cinfo.output_width * cinfo.output_components]) != NULL) {
success = true;
y = 0;
/* Process data */
while (cinfo.output_scanline < cinfo.output_height) {
num_scanlines = jpeg_read_scanlines(&cinfo, &buffer, 1);
if (cinfo.output_components == 1) {
for (l = 0; l < num_scanlines; l++, y++) {
for (x = 0; x < cinfo.output_width; x++) {
pC->SetPixelV(x, y, AColour(buffer[x], buffer[x], buffer[x]));
}
}
}
else if (cinfo.output_components == 3) {
for (l = 0; l < num_scanlines; l++, y++) {
for (x = 0; x < cinfo.output_width; x++) {
pC->SetPixelV(x, y, AColour(buffer[x * 3], buffer[x * 3 + 1], buffer[x * 3 + 2]));
}
}
}
else {
success = false;
break;
}
}
delete[] buffer;
}
/* Finish decompression and release memory.
* Must do it in this order because output module has allocated memory
* of lifespan JPOOL_IMAGE; it needs to finish before releasing memory.
*/
(void) jpeg_finish_decompress(&cinfo);
}
file.close();
}
jpeg_destroy_decompress(&cinfo);
return success;
}
