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Comparing CV/CV.xs (file contents):
Revision 1.42 by root, Sun Sep 14 12:47:59 2008 UTC vs.
Revision 1.59 by root, Sat Apr 10 03:32:09 2021 UTC

… …
7#include <math.h> 7#include <math.h>
8 8
9#include <magic.h> 9#include <magic.h>
10 10
11#include <jpeglib.h> 11#include <jpeglib.h>
12#include <jerror.h>
13
12#include <glib.h> 14#include <glib.h>
13#include <gtk/gtk.h> 15#include <gtk/gtk.h>
16#include <gdk/gdkx.h>
14#include <gdk-pixbuf/gdk-pixbuf.h> 17#include <gdk-pixbuf/gdk-pixbuf.h>
15 18
16#include <gperl.h> 19#include <gperl.h>
17#include <gtk2perl.h> 20#include <gtk2perl.h>
18 21
22#include <assert.h>
23
24#if WEBP
25#include <webp/demux.h>
26#include <webp/decode.h>
27#endif
28
29#if JXL
30#include <jxl/decode.h>
31#include "jxl/thread_parallel_runner.h"
32#endif
33
34#include "perlmulticore.h"
35
19#define IW 80 /* MUST match Schnauzer.pm! */ 36#define IW 80 /* MUST match Schnauzer.pm! */
20#define IH 60 /* MUST match Schnauzer.pm! */ 37#define IH 60 /* MUST match Schnauzer.pm! */
21 38
22#define RAND (seed = (seed + 7141) * 54773 % 134456)
23
24#define LINELENGTH 240 39#define LINELENGTH 240
25 40
26#define ELLIPSIS "\xe2\x80\xa6" 41#define ELLIPSIS "\xe2\x80\xa6"
27 42
28typedef char *octet_string; 43typedef char *octet_string;
44
45static magic_t magic_cookie[2]; /* !mime, mime */
29 46
30struct jpg_err_mgr 47struct jpg_err_mgr
31{ 48{
32 struct jpeg_error_mgr err; 49 struct jpeg_error_mgr err;
33 jmp_buf setjmp_buffer; 50 jmp_buf setjmp_buffer;
34}; 51};
35 52
36static void 53static void
37cv_error_exit (j_common_ptr cinfo) 54cv_error_exit (j_common_ptr cinfo)
38{ 55{
56 cinfo->err->output_message (cinfo);
39 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); 57 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
40} 58}
41 59
42static void 60static void
43cv_error_output (j_common_ptr cinfo) 61cv_error_output (j_common_ptr cinfo)
44{ 62{
63 char msg[JMSG_LENGTH_MAX];
64
65 cinfo->err->format_message (cinfo, msg);
66
67 fprintf (stderr, "JPEG decoding error: %s\n", msg);
45 return; 68 return;
46} 69}
47 70
48static void 71static void
49rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, 72rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
… …
146 if (!--a85_cnt) 169 if (!--a85_cnt)
147 { 170 {
148 a85_cnt = 4; 171 a85_cnt = 4;
149 if (a85_val) 172 if (a85_val)
150 { 173 {
151 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; 174 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
152 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; 175 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
153 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; 176 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
154 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; 177 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
155 a85_ptr[0] = (a85_val ) + 33; 178 a85_ptr[0] = (a85_val ) + 33;
156 179
157 a85_ptr += 5; 180 a85_ptr += 5;
158 } 181 }
… …
181 204
182 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); 205 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
183} 206}
184 207
185///////////////////////////////////////////////////////////////////////////// 208/////////////////////////////////////////////////////////////////////////////
209// memory source for libjpeg
210
211static void cv_ms_init (j_decompress_ptr cinfo)
212{
213}
214
215static void cv_ms_term (j_decompress_ptr cinfo)
216{
217}
218
219static boolean cv_ms_fill (j_decompress_ptr cinfo)
220{
221 // unexpected EOF, warn and generate fake EOI marker
222
223 WARNMS (cinfo, JWRN_JPEG_EOF);
224
225 struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src;
226
227 static const JOCTET eoi[] = { 0xFF, JPEG_EOI };
228
229 src->next_input_byte = eoi;
230 src->bytes_in_buffer = sizeof (eoi);
231
232 return TRUE;
233}
234
235static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes)
236{
237 struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src;
238
239 src->next_input_byte += num_bytes;
240 src->bytes_in_buffer -= num_bytes;
241}
242
243static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen)
244{
245 struct jpeg_source_mgr *src;
246
247 if (!cinfo->src)
248 cinfo->src = (struct jpeg_source_mgr *)
249 (*cinfo->mem->alloc_small) (
250 (j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)
251 );
252
253 src = (struct jpeg_source_mgr *)cinfo->src;
254 src->init_source = cv_ms_init;
255 src->fill_input_buffer = cv_ms_fill;
256 src->skip_input_data = cv_ms_skip;
257 src->resync_to_restart = jpeg_resync_to_restart;
258 src->term_source = cv_ms_term;
259 src->next_input_byte = (JOCTET *)buf;
260 src->bytes_in_buffer = buflen;
261}
262
263/////////////////////////////////////////////////////////////////////////////
264
265/* great, the jpeg-xl reference implementaton requires us to parse bmff files */
266
267struct bmff_box
268{
269 char type[4];
270 const uint8_t *ptr;
271 size_t size;
272};
273
274static int
275bmff_parse_box (struct bmff_box *box, const uint8_t **next_in, size_t *avail_in)
276{
277 if (*avail_in < 8)
278 return 0;
279
280 box->size = ((*next_in)[0] << 24)
281 | ((*next_in)[1] << 16)
282 | ((*next_in)[2] << 8)
283 | ((*next_in)[3] );
284
285 if (box->size < 8)
286 return 0;
287
288 if (*avail_in < box->size)
289 return 0;
290
291 memcpy (box->type, *next_in + 4, 4);
292 box->ptr = *next_in + 8;
293
294 *next_in += box->size;
295 *avail_in -= box->size;
296
297 box->size -= 8;
298
299 return 1;
300}
301
302/////////////////////////////////////////////////////////////////////////////
186 303
187MODULE = Gtk2::CV PACKAGE = Gtk2::CV 304MODULE = Gtk2::CV PACKAGE = Gtk2::CV
188 305
189PROTOTYPES: ENABLE 306PROTOTYPES: ENABLE
190 307
308# calculate the common prefix length of two strings
191# missing function in perl. really :) 309# missing function in perl. really :)
192int 310int
193common_prefix_length (a, b) 311common_prefix_length (a, b)
194 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg); 312 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
195 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg); 313 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
… …
204 322
205 OUTPUT: 323 OUTPUT:
206 RETVAL 324 RETVAL
207 325
208const char * 326const char *
209magic (octet_string path) 327magic (SV *path_or_data)
328 ALIAS:
329 magic = 0
330 magic_mime = 1
331 magic_buffer = 2
332 magic_buffer_mime = 3
210 CODE: 333 CODE:
211{ 334{
212 static magic_t cookie; 335 STRLEN len;
336 char *data = SvPVbyte (path_or_data, len);
213 337
214 if (!cookie) 338 if (!magic_cookie[0])
339 {
340 magic_cookie[0] = magic_open (MAGIC_SYMLINK);
341 magic_cookie[1] = magic_open (MAGIC_SYMLINK | MAGIC_MIME_TYPE);
342 magic_load (magic_cookie[0], 0);
343 magic_load (magic_cookie[1], 0);
215 { 344 }
216 cookie = magic_open (MAGIC_NONE);
217 345
218 if (cookie) 346 perlinterp_release ();
219 magic_load (cookie, 0);
220 else
221 XSRETURN_UNDEF;
222 }
223 347
224 RETVAL = magic_file (cookie, path);
225}
226 OUTPUT:
227 RETVAL 348 RETVAL = ix & 2
349 ? magic_buffer (magic_cookie[ix & 1], data, len)
350 : magic_file (magic_cookie[ix & 1], data);
228 351
229const char * 352 perlinterp_acquire ();
230magic_mime (octet_string path)
231 CODE:
232{
233 static magic_t cookie;
234
235 if (!cookie)
236 {
237 cookie = magic_open (MAGIC_MIME);
238
239 if (cookie)
240 magic_load (cookie, 0);
241 else
242 XSRETURN_UNDEF;
243 }
244
245 RETVAL = magic_file (cookie, path);
246} 353}
247 OUTPUT: 354 OUTPUT:
248 RETVAL 355 RETVAL
249 356
250# missing/broken in Gtk2 perl module 357# missing/broken in Gtk2 perl module
… …
266 RETVAL 373 RETVAL
267 374
268GdkPixbuf_noinc * 375GdkPixbuf_noinc *
269dealpha_expose (GdkPixbuf *pb) 376dealpha_expose (GdkPixbuf *pb)
270 CODE: 377 CODE:
378 perlinterp_release ();
271{ 379{
272 int w = gdk_pixbuf_get_width (pb); 380 int w = gdk_pixbuf_get_width (pb);
273 int h = gdk_pixbuf_get_height (pb); 381 int h = gdk_pixbuf_get_height (pb);
274 int bpp = gdk_pixbuf_get_n_channels (pb); 382 int bpp = gdk_pixbuf_get_n_channels (pb);
275 int x, y, i; 383 int x, y, i;
… …
284 for (x = 0; x < w; x++) 392 for (x = 0; x < w; x++)
285 for (y = 0; y < h; y++) 393 for (y = 0; y < h; y++)
286 for (i = 0; i < 3; i++) 394 for (i = 0; i < 3; i++)
287 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i]; 395 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
288} 396}
397 perlinterp_acquire ();
289 OUTPUT: 398 OUTPUT:
290 RETVAL 399 RETVAL
291 400
292GdkPixbuf_noinc * 401GdkPixbuf_noinc *
293rotate (GdkPixbuf *pb, int angle) 402rotate (GdkPixbuf *pb, int angle)
294 CODE: 403 CODE:
404 perlinterp_release ();
405 if (angle < 0)
406 angle += 360;
295 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE 407 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
296 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE 408 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
297 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN 409 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
298 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE 410 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
299 : angle); 411 : angle);
412 perlinterp_acquire ();
300 OUTPUT: 413 OUTPUT:
301 RETVAL 414 RETVAL
302 415
416const char *
417filetype (SV *image_data)
418 CODE:
419{
420 STRLEN data_len;
421 U8 *data = SvPVbyte (image_data, data_len);
422 static const unsigned char jxl_header[] = {
423 0, 0, 0, 0x0c, 0x4a, 0x58, 0x4c, 0x20,
424 0x0d, 0xa, 0x87, 0x0a, 0, 0, 0, 0x14,
425 0x66, 0x74, 0x79, 0x70, 0x6a, 0x78, 0x6c, 0x20,
426 0, 0, 0, 0, 0x6a, 0x78, 0x6c, 0x20,
427 };
428
429 if (data_len >= 20
430 && data[0] == 0xff
431 && data[1] == 0xd8
432 && data[2] == 0xff)
433 RETVAL = "image/jpeg";
434 else if (data_len >= 12
435 && data[ 0] == (U8)'R'
436 && data[ 1] == (U8)'I'
437 && data[ 2] == (U8)'F'
438 && data[ 3] == (U8)'F'
439 && data[ 8] == (U8)'W'
440 && data[ 9] == (U8)'E'
441 && data[10] == (U8)'B'
442 && data[11] == (U8)'P')
443 RETVAL = "image/webp";
444 else if (data_len >= 16
445 && data[ 0] == 0x89
446 && data[ 1] == (U8)'P'
447 && data[ 2] == (U8)'N'
448 && data[ 3] == (U8)'G'
449 && data[ 4] == 0x0d
450 && data[ 5] == 0x0a
451 && data[ 6] == 0x1a
452 && data[ 7] == 0x0a)
453 RETVAL = "image/png";
454 else if (data_len >= sizeof (jxl_header) && memcmp (data, jxl_header, sizeof (jxl_header)) == 0)
455 RETVAL = "image/jxl";
456 else
457 XSRETURN_UNDEF;
458}
459 OUTPUT:
460 RETVAL
461
303GdkPixbuf_noinc * 462GdkPixbuf_noinc *
304load_jpeg (SV *path, int thumbnail=0) 463decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
464 CODE:
465{
466#if WEBP
467 STRLEN data_size;
468 int alpha;
469 WebPData data;
470 WebPDemuxer *demux;
471 WebPIterator iter;
472 WebPDecoderConfig config;
473 int inw, inh;
474
475 data.bytes = (uint8_t *)SvPVbyte (image_data, data_size);
476 data.size = data_size;
477
478 perlinterp_release ();
479
480 RETVAL = 0;
481
482 if (!(demux = WebPDemux (&data)))
483 goto err_demux;
484
485 if (!WebPDemuxGetFrame (demux, 1, &iter))
486 goto err_iter;
487
488 if (!WebPInitDecoderConfig (&config))
489 goto err_iter;
490
491 config.options.use_threads = 1;
492
493 if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK)
494 goto err_iter;
495
496 inw = config.input.width;
497 inh = config.input.height;
498
499 if (thumbnail)
500 {
501 if (inw * ih > inh * iw)
502 ih = (iw * inh + inw - 1) / inw;
503 else
504 iw = (ih * inw + inh - 1) / inh;
505
506 config.options.bypass_filtering = 1;
507 config.options.no_fancy_upsampling = 1;
508
509 config.options.use_scaling = 1;
510 config.options.scaled_width = iw;
511 config.options.scaled_height = ih;
512 }
513 else
514 {
515 iw = inw;
516 ih = inh;
517 }
518
519 alpha = !!config.input.has_alpha;
520
521 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih);
522 if (!RETVAL)
523 goto err_iter;
524
525 config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
526 config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
527 config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
528 config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
529 config.output.is_external_memory = 1;
530
531 if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK)
532 {
533 g_object_unref (RETVAL);
534 RETVAL = 0;
535 goto err_iter;
536 }
537
538 err_iter:
539 WebPDemuxReleaseIterator (&iter);
540 err_demux:
541 WebPDemuxDelete (demux);
542
543 perlinterp_acquire ();
544#else
545 croak ("load_webp: webp not enabled at compile time");
546#endif
547}
548 OUTPUT:
549 RETVAL
550
551GdkPixbuf_noinc *
552decode_jxl (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
553 CODE:
554{
555#if JXL
556 JxlDecoder *dec = JxlDecoderCreate (0);
557 JxlBasicInfo info;
558 const uint8_t *next_in = (uint8_t *)SvPVbyte_nolen (image_data);
559 size_t avail_in = SvCUR (image_data);
560 const char *error = 0;
561 void *runner = 0;
562 struct bmff_box box;
563
564 perlinterp_release ();
565
566 RETVAL = 0;
567
568 error = "JxlDecoderCreate failed";
569 if (!dec)
570 goto done;
571
572 runner = JxlThreadParallelRunnerCreate (0, JxlThreadParallelRunnerDefaultNumWorkerThreads ());
573
574 error = "JxlDecoderSetParallelRunner failed";
575 if (JxlDecoderSetParallelRunner (dec, JxlThreadParallelRunner, runner) != JXL_DEC_SUCCESS)
576 goto done;
577
578 error = "JxlDecoderSubscribeEvents failed";
579 if (JxlDecoderSubscribeEvents (dec, JXL_DEC_FULL_IMAGE | JXL_DEC_BASIC_INFO) != JXL_DEC_SUCCESS)
580 goto done;
581
582 error = "JxlDecoderSetInput failed";
583 if (JxlDecoderSetInput (dec, next_in, avail_in) != JXL_DEC_SUCCESS)
584 goto done;
585
586 for (;;)
587 {
588 JxlDecoderStatus status = JxlDecoderProcessInput (dec);
589
590 printf ("status %d\n",status);
591
592 switch (status)
593 {
594 case JXL_DEC_ERROR:
595 error = "JxlDecoderProcessInput failed";
596 goto done;
597
598 case JXL_DEC_NEED_MORE_INPUT:
599 error = "incomplete file";
600 goto done;
601
602 case JXL_DEC_SUCCESS:
603 goto done;
604
605 case JXL_DEC_NEED_IMAGE_OUT_BUFFER:
606 {
607 error = "JxlDecoderGetBasicInfo failed";
608 if (JxlDecoderGetBasicInfo (dec, &info) != JXL_DEC_SUCCESS)
609 goto done;
610
611 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!info.alpha_bits, 8, info.xsize, info.ysize);
612 error = "unable to allocate pixbuf";
613 if (!RETVAL)
614 goto done;
615
616 JxlPixelFormat format = {
617 info.alpha_bits ? 4 : 3,
618 JXL_TYPE_UINT8,
619 JXL_NATIVE_ENDIAN,
620 gdk_pixbuf_get_rowstride (RETVAL)
621 };
622
623 error = "JxlDecoderSetImageOutBuffer failed";
624 if (JxlDecoderSetImageOutBuffer (
625 dec,
626 &format,
627 gdk_pixbuf_get_pixels (RETVAL),
628 gdk_pixbuf_get_byte_length (RETVAL)
629 ) != JXL_DEC_SUCCESS)
630 goto done;
631 }
632 break;
633
634 default:
635 error = "unexpected event";
636 goto done;
637 }
638 }
639
640 done:
641 if (dec)
642 JxlDecoderDestroy (dec);
643
644 if (runner)
645 JxlThreadParallelRunnerDestroy (runner);
646
647 perlinterp_acquire ();
648
649 if (error)
650 {
651 if (RETVAL)
652 g_object_unref (RETVAL);
653
654 croak ("load_jxl: %s", error);
655 }
656#else
657 croak ("load_jxl: jpeg-xl not enabled at compile time");
658#endif
659}
660 OUTPUT:
661 RETVAL
662
663GdkPixbuf_noinc *
664decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
305 CODE: 665 CODE:
306{ 666{
307 struct jpeg_decompress_struct cinfo; 667 struct jpeg_decompress_struct cinfo;
308 struct jpg_err_mgr jerr; 668 struct jpg_err_mgr jerr;
309 guchar *data;
310 int rs; 669 int rs;
311 FILE *fp;
312 volatile GdkPixbuf *pb = 0; 670 volatile GdkPixbuf *pb = 0;
671 STRLEN data_len;
672 guchar *data = SvPVbyte (image_data, data_len);
313 673
314 RETVAL = 0; 674 RETVAL = 0;
315 675
316 fp = fopen (SvPVbyte_nolen (path), "rb"); 676 perlinterp_release ();
317
318 if (!fp)
319 XSRETURN_UNDEF;
320 677
321 cinfo.err = jpeg_std_error (&jerr.err); 678 cinfo.err = jpeg_std_error (&jerr.err);
322 679
323 jerr.err.error_exit = cv_error_exit; 680 jerr.err.error_exit = cv_error_exit;
324 jerr.err.output_message = cv_error_output; 681 jerr.err.output_message = cv_error_output;
325 682
326 if ((rs = setjmp (jerr.setjmp_buffer))) 683 if ((rs = setjmp (jerr.setjmp_buffer)))
327 { 684 {
328 fclose (fp);
329 jpeg_destroy_decompress (&cinfo); 685 jpeg_destroy_decompress (&cinfo);
330 686
331 if (pb) 687 if (pb)
332 g_object_unref ((gpointer)pb); 688 g_object_unref ((gpointer)pb);
333 689
690 perlinterp_acquire ();
334 XSRETURN_UNDEF; 691 XSRETURN_UNDEF;
335 } 692 }
336 693
694 if (!data_len)
695 longjmp (jerr.setjmp_buffer, 4);
696
337 jpeg_create_decompress (&cinfo); 697 jpeg_create_decompress (&cinfo);
698 cv_jpeg_mem_src (&cinfo, data, data_len);
338 699
339 jpeg_stdio_src (&cinfo, fp);
340 jpeg_read_header (&cinfo, TRUE); 700 jpeg_read_header (&cinfo, TRUE);
341 701
342 cinfo.dct_method = JDCT_DEFAULT; 702 cinfo.dct_method = JDCT_DEFAULT;
343 cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */ 703 cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
344 cinfo.do_block_smoothing = FALSE; 704 cinfo.do_block_smoothing = FALSE;
… …
354 { 714 {
355 cinfo.dct_method = JDCT_FASTEST; 715 cinfo.dct_method = JDCT_FASTEST;
356 cinfo.do_fancy_upsampling = FALSE; 716 cinfo.do_fancy_upsampling = FALSE;
357 717
358 while (cinfo.scale_denom < 8 718 while (cinfo.scale_denom < 8
359 && cinfo.output_width >= IW*4 719 && cinfo.output_width >= iw*4
360 && cinfo.output_height >= IH*4) 720 && cinfo.output_height >= ih*4)
361 { 721 {
362 cinfo.scale_denom <<= 1; 722 cinfo.scale_denom <<= 1;
363 jpeg_calc_output_dimensions (&cinfo); 723 jpeg_calc_output_dimensions (&cinfo);
364 } 724 }
365 } 725 }
366 726
727 if (cinfo.output_components != 3)
728 longjmp (jerr.setjmp_buffer, 3);
729
730 if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK)
731 {
732 cinfo.out_color_space = JCS_CMYK;
733 cinfo.output_components = 4;
734 }
735
367 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height); 736 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
368 if (!RETVAL) 737 if (!RETVAL)
369 longjmp (jerr.setjmp_buffer, 2); 738 longjmp (jerr.setjmp_buffer, 2);
370 739
371 data = gdk_pixbuf_get_pixels (RETVAL); 740 data = gdk_pixbuf_get_pixels (RETVAL);
372 rs = gdk_pixbuf_get_rowstride (RETVAL); 741 rs = gdk_pixbuf_get_rowstride (RETVAL);
373
374 if (cinfo.output_components != 3)
375 longjmp (jerr.setjmp_buffer, 3);
376 742
377 jpeg_start_decompress (&cinfo); 743 jpeg_start_decompress (&cinfo);
378 744
379 while (cinfo.output_scanline < cinfo.output_height) 745 while (cinfo.output_scanline < cinfo.output_height)
380 { 746 {
… …
387 rp [3] = (guchar *)rp [2] + rs; 753 rp [3] = (guchar *)rp [2] + rs;
388 754
389 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); 755 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
390 } 756 }
391 757
758 if (cinfo.out_color_space == JCS_CMYK)
759 {
760 guchar *end = data + cinfo.output_height * rs;
761
762 while (data < end)
763 {
764 U32 c = data [0];
765 U32 m = data [1];
766 U32 y = data [2];
767 U32 k = data [3];
768
769 if (0)
770 if (cinfo.Adobe_transform == 2)
771 {
772 c ^= 0xff;
773 m ^= 0xff;
774 y ^= 0xff;
775 k ^= 0xff;
776 }
777
778 data [0] = (c * k + 0x80) / 0xff;
779 data [1] = (m * k + 0x80) / 0xff;
780 data [2] = (y * k + 0x80) / 0xff;
781 data [3] = 0xff;
782
783 data += 4;
784 }
785 }
786
392 jpeg_finish_decompress (&cinfo); 787 jpeg_finish_decompress (&cinfo);
393 fclose (fp);
394 jpeg_destroy_decompress (&cinfo); 788 jpeg_destroy_decompress (&cinfo);
789 perlinterp_acquire ();
395} 790}
396 OUTPUT: 791 OUTPUT:
397 RETVAL 792 RETVAL
398 793
399void 794void
400compare (GdkPixbuf *a, GdkPixbuf *b) 795compare (GdkPixbuf *a, GdkPixbuf *b)
401 PPCODE: 796 PPCODE:
797 perlinterp_release ();
402{ 798{
403 int w = gdk_pixbuf_get_width (a); 799 int w = gdk_pixbuf_get_width (a);
404 int h = gdk_pixbuf_get_height (a); 800 int h = gdk_pixbuf_get_height (a);
801
405 int sa = gdk_pixbuf_get_rowstride (a); 802 int sa = gdk_pixbuf_get_rowstride (a);
406 int sb = gdk_pixbuf_get_rowstride (b); 803 int sb = gdk_pixbuf_get_rowstride (b);
407 804
408 guchar *pa = gdk_pixbuf_get_pixels (a); 805 guchar *pa = gdk_pixbuf_get_pixels (a);
409 guchar *pb = gdk_pixbuf_get_pixels (b); 806 guchar *pb = gdk_pixbuf_get_pixels (b);
… …
432 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); 829 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
433 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); 830 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
434 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); 831 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
435 } 832 }
436 } 833 }
834
835 perlinterp_acquire ();
437 836
438 EXTEND (SP, 2); 837 EXTEND (SP, 2);
439 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.))))); 838 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
440 PUSHs (sv_2mortal (newSVnv (peak / 255.))); 839 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
441} 840}

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