ViewVC Help
View File | Revision Log | Show Annotations | Download File
/cvs/CV/CV.xs
(Generate patch)

Comparing CV/CV.xs (file contents):
Revision 1.2 by root, Mon Nov 3 00:04:22 2003 UTC vs.
Revision 1.53 by root, Sat Dec 23 05:27:04 2017 UTC

1#include "EXTERN.h" 1#include "EXTERN.h"
2#include "perl.h" 2#include "perl.h"
3#include "XSUB.h" 3#include "XSUB.h"
4 4
5#include <string.h>
6#include <setjmp.h>
7#include <math.h>
8
9#include <magic.h>
10
11#include <jpeglib.h>
12#include <jerror.h>
13
14#include <glib.h>
15#include <gtk/gtk.h>
16#include <gdk/gdkx.h>
5#include <gdk-pixbuf/gdk-pixbuf.h> 17#include <gdk-pixbuf/gdk-pixbuf.h>
6 18
7#include <gperl.h> 19#include <gperl.h>
8#include <gtk2perl.h> 20#include <gtk2perl.h>
9 21
22#include <assert.h>
23
24#if WEBP
25#include <webp/decode.h>
26#endif
27
28#include "perlmulticore.h"
29
30#define IW 80 /* MUST match Schnauzer.pm! */
31#define IH 60 /* MUST match Schnauzer.pm! */
32
33#define RAND (seed = (seed + 7141) * 54773 % 134456)
34
35#define LINELENGTH 240
36
37#define ELLIPSIS "\xe2\x80\xa6"
38
39typedef char *octet_string;
40
41static magic_t magic_cookie[2]; /* !mime, mime */
42
43struct jpg_err_mgr
44{
45 struct jpeg_error_mgr err;
46 jmp_buf setjmp_buffer;
47};
48
49static void
50cv_error_exit (j_common_ptr cinfo)
51{
52 cinfo->err->output_message (cinfo);
53 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
54}
55
56static void
57cv_error_output (j_common_ptr cinfo)
58{
59 char msg[JMSG_LENGTH_MAX];
60
61 cinfo->err->format_message (cinfo, msg);
62
63 fprintf (stderr, "JPEG decoding error: %s\n", msg);
64 return;
65}
66
67static void
68rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
69 unsigned int *h, unsigned int *s, unsigned int *v)
70{
71 unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
72 unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
73 unsigned int delta = mx - mn;
74
75 *v = mx;
76
77 *s = mx ? delta * 255 / mx : 0;
78
79 if (delta == 0)
80 *h = 0;
81 else
82 {
83 if (r == mx)
84 *h = ((int)g - (int)b) * 255 / (int)(delta * 3);
85 else if (g == mx)
86 *h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52;
87 else if (b == mx)
88 *h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103;
89
90 *h &= 255;
91 }
92}
93
94struct feature {
95 float v1, v2, v3; // mean, square, cube
96 int n;
97};
98
99static void
100feature_init (struct feature *f)
101{
102 f->v1 = 0.;
103 f->v2 = 0.;
104 f->v3 = 0.;
105 f->n = 0;
106}
107
108// didn't find an algorithm to neatly do mean, variance and skew in one pass.
109// elmex ist schuld.
110static void
111feature_update_pass_1 (struct feature *f, unsigned int v)
112{
113 f->v1 += v;
114 f->n += 1;
115}
116
117static void
118feature_finish_pass_1 (struct feature *f)
119{
120 if (f->n < 1)
121 return;
122
123 f->v1 /= f->n;
124}
125
126static void
127feature_update_pass_2 (struct feature *f, unsigned int v)
128{
129 float d = v - f->v1;
130
131 f->v2 += d * d;
132 f->v3 += d * d * d;
133}
134
135static void
136feature_finish_pass_2 (struct feature *f)
137{
138 if (f->n < 1)
139 return;
140
141 f->v2 /= f->n;
142 f->v3 /= f->n;
143
144 f->v1 /= 255.;
145 f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
146 f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
147}
148
149static guint32 a85_val;
150static guint a85_cnt;
151static guchar a85_buf[LINELENGTH], *a85_ptr;
152
153static void
154a85_init (void)
155{
156 a85_cnt = 4;
157 a85_ptr = a85_buf;
158}
159
160static void
161a85_push (PerlIO *fp, guchar c)
162{
163 a85_val = a85_val << 8 | c;
164
165 if (!--a85_cnt)
166 {
167 a85_cnt = 4;
168 if (a85_val)
169 {
170 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
171 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
172 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
173 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
174 a85_ptr[0] = (a85_val ) + 33;
175
176 a85_ptr += 5;
177 }
178 else
179 *a85_ptr++ = 'z';
180
181 if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
182 {
183 *a85_ptr++ = '\n';
184 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
185 a85_ptr = a85_buf;
186 }
187 }
188
189}
190
191static void
192a85_finish (PerlIO *fp)
193{
194 while (a85_cnt != 4)
195 a85_push (fp, 0);
196
197 *a85_ptr++ = '~'; // probably buggy end-marker
198 *a85_ptr++ = '>'; // probably buggy end-marker
199 *a85_ptr++ = '\n';
200
201 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
202}
203
204/////////////////////////////////////////////////////////////////////////////
205
206static void cv_ms_init (j_decompress_ptr cinfo)
207{
208}
209
210static void cv_ms_term (j_decompress_ptr cinfo)
211{
212}
213
214static boolean cv_ms_fill (j_decompress_ptr cinfo)
215{
216 ERREXIT (cinfo, JERR_INPUT_EMPTY);
217
218 return TRUE;
219}
220
221static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes)
222{
223 if (num_bytes > 0)
224 {
225 struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src;
226
227 src->next_input_byte += num_bytes;
228 src->bytes_in_buffer -= num_bytes;
229 }
230}
231
232static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen)
233{
234 struct jpeg_source_mgr *src;
235
236 if (!cinfo->src)
237 cinfo->src = (struct jpeg_source_mgr *)
238 (*cinfo->mem->alloc_small) (
239 (j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)
240 );
241
242 src = (struct jpeg_source_mgr *)cinfo->src;
243 src->init_source = cv_ms_init;
244 src->fill_input_buffer = cv_ms_fill;
245 src->skip_input_data = cv_ms_skip;
246 src->resync_to_restart = jpeg_resync_to_restart;
247 src->term_source = cv_ms_term;
248 src->next_input_byte = (JOCTET *)buf;
249 src->bytes_in_buffer = buflen;
250}
251
252/////////////////////////////////////////////////////////////////////////////
253
10MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow 254MODULE = Gtk2::CV PACKAGE = Gtk2::CV
11 255
12PROTOTYPES: ENABLE 256PROTOTYPES: ENABLE
13 257
258# missing function in perl. really :)
259int
260common_prefix_length (a, b)
261 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
262 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
263 CODE:
264 RETVAL = 0;
265
266 while (*a == *b && *a)
267 {
268 RETVAL += (*a & 0xc0) != 0x80;
269 a++, b++;
270 }
271
272 OUTPUT:
273 RETVAL
274
275const char *
276magic (SV *path_or_data)
277 ALIAS:
278 magic = 0
279 magic_mime = 1
280 magic_buffer = 2
281 magic_buffer_mime = 3
282 CODE:
283{
284 STRLEN len;
285 char *data = SvPVbyte (path_or_data, len);
286
287 if (!magic_cookie[0])
288 {
289 magic_cookie[0] = magic_open (MAGIC_SYMLINK);
290 magic_cookie[1] = magic_open (MAGIC_SYMLINK | MAGIC_MIME_TYPE);
291 magic_load (magic_cookie[0], 0);
292 magic_load (magic_cookie[1], 0);
293 }
294
295 perlinterp_release ();
296
297 RETVAL = ix & 2
298 ? magic_buffer (magic_cookie[ix & 1], data, len)
299 : magic_file (magic_cookie[ix & 1], data);
300
301 perlinterp_acquire ();
302}
303 OUTPUT:
304 RETVAL
305
306# missing/broken in Gtk2 perl module
307
308void
309gdk_window_clear_hints (GdkWindow *window)
310 CODE:
311 gdk_window_set_geometry_hints (window, 0, 0);
312
313gboolean
314gdk_net_wm_supports (GdkAtom property)
315 CODE:
316#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
317 RETVAL = gdk_net_wm_supports (property);
318#else
319 RETVAL = 0;
320#endif
321 OUTPUT:
322 RETVAL
323
14GdkPixbuf * 324GdkPixbuf_noinc *
15transpose (GdkPixbuf *pb) 325dealpha_expose (GdkPixbuf *pb)
16 CODE: 326 CODE:
327 perlinterp_release ();
17{ 328{
18 int w = gdk_pixbuf_get_width (pb); 329 int w = gdk_pixbuf_get_width (pb);
19 int h = gdk_pixbuf_get_height (pb); 330 int h = gdk_pixbuf_get_height (pb);
20 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 331 int bpp = gdk_pixbuf_get_n_channels (pb);
21 int x, y, i; 332 int x, y, i;
22 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 333 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
23 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 334 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
24 335
25 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); 336 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
26 337
27 dst = gdk_pixbuf_get_pixels (RETVAL); 338 dst = gdk_pixbuf_get_pixels (RETVAL);
28 dstr = gdk_pixbuf_get_rowstride (RETVAL); 339 dstr = gdk_pixbuf_get_rowstride (RETVAL);
29 340
30 for (x = 0; x < w; x++) 341 for (x = 0; x < w; x++)
31 for (y = 0; y < h; y++) 342 for (y = 0; y < h; y++)
32 for (i = 0; i < bpp; i++) 343 for (i = 0; i < 3; i++)
33 dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i]; 344 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
34} 345}
346 perlinterp_acquire ();
35 OUTPUT: 347 OUTPUT:
36 RETVAL 348 RETVAL
37 349
38GdkPixbuf * 350GdkPixbuf_noinc *
39flop (GdkPixbuf *pb) 351rotate (GdkPixbuf *pb, int angle)
40 CODE: 352 CODE:
353 perlinterp_release ();
354 if (angle < 0)
355 angle += 360;
356 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
357 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
358 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
359 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
360 : angle);
361 perlinterp_acquire ();
362 OUTPUT:
363 RETVAL
364
365const char *
366filetype (SV *image_data)
367 CODE:
41{ 368{
42 int w = gdk_pixbuf_get_width (pb); 369 STRLEN data_len;
43 int h = gdk_pixbuf_get_height (pb); 370 U8 *data = SvPVbyte (image_data, data_len);
44 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 371
372 if (data_len >= 20
373 && data[0] == 0xff
374 && data[1] == 0xd8
375 && data[2] == 0xff)
376 RETVAL = "jpg";
377 else if (data_len >= 12
378 && data[ 0] == (U8)'R'
379 && data[ 1] == (U8)'I'
380 && data[ 2] == (U8)'F'
381 && data[ 3] == (U8)'F'
382 && data[ 8] == (U8)'W'
383 && data[ 9] == (U8)'E'
384 && data[10] == (U8)'B'
385 && data[11] == (U8)'P')
386 RETVAL = "webp";
387 else if (data_len >= 16
388 && data[ 0] == 0x89
389 && data[ 1] == (U8)'P'
390 && data[ 2] == (U8)'N'
391 && data[ 3] == (U8)'G'
392 && data[ 4] == 0x0d
393 && data[ 5] == 0x0a
394 && data[ 6] == 0x1a
395 && data[ 7] == 0x0a)
396 RETVAL = "png";
397 else
398 RETVAL = "other";
399}
400 OUTPUT:
401 RETVAL
402
403GdkPixbuf_noinc *
404decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
405 CODE:
406{
407#if WEBP
408 guchar *data;
409 STRLEN data_size;
410 int alpha;
411 WebPDecoderConfig config;
45 int x, y, i; 412 int inw, inh;
46 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
47 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
48 413
414 data = SvPVbyte (image_data, data_size);
415
416 perlinterp_release ();
417
418 RETVAL = 0;
419
420 if (!WebPInitDecoderConfig (&config))
421 goto err;
422
423 config.options.use_threads = 1;
424
425 if (WebPGetFeatures (data, data_size, &config.input) != VP8_STATUS_OK)
426 goto err;
427
428 inw = config.input.width;
429 inh = config.input.height;
430
431 if (thumbnail)
432 {
433 if (inw * ih > inh * iw)
434 ih = (iw * inh + inw - 1) / inw;
435 else
436 iw = (ih * inw + inh - 1) / inh;
437
438 config.options.bypass_filtering = 1;
439 config.options.no_fancy_upsampling = 1;
440
441 config.options.use_scaling = 1;
442 config.options.scaled_width = iw;
443 config.options.scaled_height = ih;
444 }
445 else
446 {
447 iw = inw;
448 ih = inh;
449 }
450
451 alpha = config.input.has_alpha;
452
49 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); 453 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!alpha, 8, iw, ih);
454 if (!RETVAL)
455 goto err;
50 456
457 config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
458 config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
459 config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
460 config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
461 config.output.is_external_memory = 1;
462
463 if (WebPDecode (data, data_size, &config) != VP8_STATUS_OK)
464 {
465 g_object_unref (RETVAL);
466 RETVAL = 0;
467 goto err;
468 }
469
470 err:
471 perlinterp_acquire ();
472#else
473 croak ("load_webp: webp not enabled at compile time");
474#endif
475}
476 OUTPUT:
477 RETVAL
478
479GdkPixbuf_noinc *
480decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
481 CODE:
482{
483 struct jpeg_decompress_struct cinfo;
484 struct jpg_err_mgr jerr;
485 int rs;
486 volatile GdkPixbuf *pb = 0;
487 STRLEN data_len;
488 guchar *data = SvPVbyte (image_data, data_len);
489
490 RETVAL = 0;
491
492 perlinterp_release ();
493
494 cinfo.err = jpeg_std_error (&jerr.err);
495
496 jerr.err.error_exit = cv_error_exit;
497 jerr.err.output_message = cv_error_output;
498
499 if ((rs = setjmp (jerr.setjmp_buffer)))
500 {
501 jpeg_destroy_decompress (&cinfo);
502
503 if (pb)
504 g_object_unref ((gpointer)pb);
505
506 perlinterp_acquire ();
507 XSRETURN_UNDEF;
508 }
509
510 jpeg_create_decompress (&cinfo);
511 cv_jpeg_mem_src (&cinfo, data, data_len);
512
513 jpeg_read_header (&cinfo, TRUE);
514
515 cinfo.dct_method = JDCT_DEFAULT;
516 cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
517 cinfo.do_block_smoothing = FALSE;
518 cinfo.out_color_space = JCS_RGB;
519 cinfo.quantize_colors = FALSE;
520
521 cinfo.scale_num = 1;
522 cinfo.scale_denom = 1;
523
524 jpeg_calc_output_dimensions (&cinfo);
525
526 if (thumbnail)
527 {
528 cinfo.dct_method = JDCT_FASTEST;
529 cinfo.do_fancy_upsampling = FALSE;
530
531 while (cinfo.scale_denom < 8
532 && cinfo.output_width >= iw*4
533 && cinfo.output_height >= ih*4)
534 {
535 cinfo.scale_denom <<= 1;
536 jpeg_calc_output_dimensions (&cinfo);
537 }
538 }
539
540 if (cinfo.output_components != 3)
541 longjmp (jerr.setjmp_buffer, 3);
542
543 if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK)
544 {
545 cinfo.out_color_space = JCS_CMYK;
546 cinfo.output_components = 4;
547 }
548
549 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
550 if (!RETVAL)
551 longjmp (jerr.setjmp_buffer, 2);
552
51 dst = gdk_pixbuf_get_pixels (RETVAL); 553 data = gdk_pixbuf_get_pixels (RETVAL);
52 dstr = gdk_pixbuf_get_rowstride (RETVAL); 554 rs = gdk_pixbuf_get_rowstride (RETVAL);
53 555
54 for (x = 0; x < w; x++) 556 jpeg_start_decompress (&cinfo);
557
558 while (cinfo.output_scanline < cinfo.output_height)
559 {
560 int remaining = cinfo.output_height - cinfo.output_scanline;
561 JSAMPROW rp[4];
562
563 rp [0] = data + cinfo.output_scanline * rs;
564 rp [1] = (guchar *)rp [0] + rs;
565 rp [2] = (guchar *)rp [1] + rs;
566 rp [3] = (guchar *)rp [2] + rs;
567
568 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
569 }
570
571 if (cinfo.out_color_space == JCS_CMYK)
572 {
573 guchar *end = data + cinfo.output_height * rs;
574
575 while (data < end)
576 {
577 U32 c = data [0];
578 U32 m = data [1];
579 U32 y = data [2];
580 U32 k = data [3];
581
582 if (0)
583 if (cinfo.Adobe_transform == 2)
584 {
585 c ^= 0xff;
586 m ^= 0xff;
587 y ^= 0xff;
588 k ^= 0xff;
589 }
590
591 data [0] = (c * k + 0x80) / 0xff;
592 data [1] = (m * k + 0x80) / 0xff;
593 data [2] = (y * k + 0x80) / 0xff;
594 data [3] = 0xff;
595
596 data += 4;
597 }
598 }
599
600 jpeg_finish_decompress (&cinfo);
601 jpeg_destroy_decompress (&cinfo);
602 perlinterp_acquire ();
603}
604 OUTPUT:
605 RETVAL
606
607void
608compare (GdkPixbuf *a, GdkPixbuf *b)
609 PPCODE:
610 perlinterp_release ();
611{
612 int w = gdk_pixbuf_get_width (a);
613 int h = gdk_pixbuf_get_height (a);
614
615 int sa = gdk_pixbuf_get_rowstride (a);
616 int sb = gdk_pixbuf_get_rowstride (b);
617
618 guchar *pa = gdk_pixbuf_get_pixels (a);
619 guchar *pb = gdk_pixbuf_get_pixels (b);
620
621 int x, y;
622
623 assert (w == gdk_pixbuf_get_width (b));
624 assert (h == gdk_pixbuf_get_height (b));
625
626 assert (gdk_pixbuf_get_n_channels (a) == 3);
627 assert (gdk_pixbuf_get_n_channels (b) == 3);
628
629 double diff = 0.;
630 int peak = 0;
631
632 if (w && h)
55 for (y = 0; y < h; y++) 633 for (y = 0; y < h; y++)
634 {
635 guchar *pa_ = pa + y * sa;
636 guchar *pb_ = pb + y * sb;
637
56 for (i = 0; i < bpp; i++) 638 for (x = 0; x < w; x++)
57 dst[(w - x) * bpp + y * dstr + i] = src[x *bpp + y * sstr + i]; 639 {
640 int d;
641
642 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
643 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
644 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
645 }
646 }
647
648 perlinterp_acquire ();
649
650 EXTEND (SP, 2);
651 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
652 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
653}
654
655#############################################################################
656
657MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
658
659# currently only works for filenames (octet strings)
660
661SV *
662foldcase (SV *pathsv)
663 PROTOTYPE: $
664 CODE:
665{
666 STRLEN plen;
667 U8 *path = (U8 *)SvPV (pathsv, plen);
668 U8 *pend = path + plen;
669 U8 dst [plen * 6 * 3], *dstp = dst;
670
671 while (path < pend)
672 {
673 U8 ch = *path;
674
675 if (ch >= 'a' && ch <= 'z')
676 *dstp++ = *path++;
677 else if (ch >= 'A' && ch <= 'Z')
678 *dstp++ = *path++ + ('a' - 'A');
679 else if (ch >= '0' && ch <= '9')
680 {
681 STRLEN el, nl = 0;
682 while (*path >= '0' && *path <= '9' && path < pend)
683 path++, nl++;
684
685 for (el = nl; el < 6; el++)
686 *dstp++ = '0';
687
688 memcpy (dstp, path - nl, nl);
689 dstp += nl;
690 }
691 else
692 *dstp++ = *path++;
693#if 0
694 else
695 {
696 STRLEN cl;
697 to_utf8_fold (path, dstp, &cl);
698 dstp += cl;
699 path += is_utf8_char (path);
700 }
701#endif
702 }
703
704 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
58} 705}
59 OUTPUT: 706 OUTPUT:
60 RETVAL 707 RETVAL
61 708
62MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
63
64GdkPixbuf * 709GdkPixbuf_noinc *
65p7_to_pb (int w, int h, guchar *src) 710p7_to_pb (int w, int h, SV *src_sv)
711 PROTOTYPE: @
66 CODE: 712 CODE:
67{ 713{
68 int x, y; 714 int x, y;
69 guchar *dst, *d; 715 guchar *dst, *d;
70 int dstr; 716 int dstr;
717 guchar *src = (guchar *)SvPVbyte_nolen (src_sv);
71 718
72 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); 719 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
73 dst = gdk_pixbuf_get_pixels (RETVAL); 720 dst = gdk_pixbuf_get_pixels (RETVAL);
74 dstr = gdk_pixbuf_get_rowstride (RETVAL); 721 dstr = gdk_pixbuf_get_rowstride (RETVAL);
75 722
76 for (y = 0; y < h; y++) 723 for (y = 0; y < h; y++)
77 for (d = dst + y * dstr, x = 0; x < w; x++) 724 for (d = dst + y * dstr, x = 0; x < w; x++)
78 { 725 {
79 *d++ = ((*src >> 5) & 7) * 255 / 7; 726 *d++ = (((*src >> 5) & 7) * 255 + 4) / 7;
80 *d++ = ((*src >> 2) & 7) * 255 / 7; 727 *d++ = (((*src >> 2) & 7) * 255 + 4) / 7;
81 *d++ = ((*src >> 0) & 3) * 255 / 3; 728 *d++ = (((*src >> 0) & 3) * 255 + 2) / 3;
82 729
83 src++; 730 src++;
84 } 731 }
85} 732}
86 OUTPUT: 733 OUTPUT:
87 RETVAL 734 RETVAL
88 735
736#############################################################################
89 737
738MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
90 739
740void
741dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
742 CODE:
743{
744 int w = gdk_pixbuf_get_width (pb);
745 int h = gdk_pixbuf_get_height (pb);
746 int x, y, i;
747 guchar *dst;
748 int bpp = gdk_pixbuf_get_n_channels (pb);
749 guchar *src = gdk_pixbuf_get_pixels (pb);
750 int sstr = gdk_pixbuf_get_rowstride (pb);
751
752 a85_init ();
753
754 for (y = 0; y < h; y++)
755 for (x = 0; x < w; x++)
756 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
757 a85_push (fp, src [x * bpp + y * sstr + i]);
758
759 a85_finish (fp);
760}
761
762void
763dump_binary (PerlIO *fp, GdkPixbuf *pb)
764 CODE:
765{
766 int w = gdk_pixbuf_get_width (pb);
767 int h = gdk_pixbuf_get_height (pb);
768 int x, y, i;
769 guchar *dst;
770 int bpp = gdk_pixbuf_get_n_channels (pb);
771 guchar *src = gdk_pixbuf_get_pixels (pb);
772 int sstr = gdk_pixbuf_get_rowstride (pb);
773
774 for (y = 0; y < h; y++)
775 for (x = 0; x < w; x++)
776 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
777 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
778}
779
780#############################################################################
781
782MODULE = Gtk2::CV PACKAGE = Gtk2::CV
783
784SV *
785pb_to_hv84 (GdkPixbuf *pb)
786 CODE:
787{
788 int w = gdk_pixbuf_get_width (pb);
789 int h = gdk_pixbuf_get_height (pb);
790 int x, y;
791 guchar *dst;
792 int bpp = gdk_pixbuf_get_n_channels (pb);
793 guchar *src = gdk_pixbuf_get_pixels (pb);
794 int sstr = gdk_pixbuf_get_rowstride (pb);
795
796 RETVAL = newSV (6 * 8 * 12 / 8);
797 SvPOK_only (RETVAL);
798 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
799
800 dst = (guchar *)SvPVX (RETVAL);
801
802 /* some primitive error distribution + random dithering */
803
804 for (y = 0; y < h; y++)
805 {
806 guchar *p = src + y * sstr;
807
808 for (x = 0; x < w; x += 2)
809 {
810 unsigned int r, g, b, h, s, v, H, V1, V2;
811
812 if (bpp == 3)
813 r = *p++, g = *p++, b = *p++;
814 else if (bpp == 1)
815 r = g = b = *p++;
816 else
817 abort ();
818
819 rgb_to_hsv (r, g, b, &h, &s, &v);
820
821 H = (h * 15 / 255) << 4;
822 V1 = v;
823
824 if (bpp == 3)
825 r = *p++, g = *p++, b = *p++;
826 else if (bpp == 1)
827 r = g = b = *p++;
828 else
829 abort ();
830
831 rgb_to_hsv (r, g, b, &h, &s, &v);
832
833 H |= h * 15 / 255;
834 V2 = v;
835
836 *dst++ = H;
837 *dst++ = V1;
838 *dst++ = V2;
839 }
840 }
841}
842 OUTPUT:
843 RETVAL
844
845SV *
846hv84_to_av (unsigned char *hv84)
847 CODE:
848{
849 int i = 72 / 3;
850 AV *av = newAV ();
851
852 RETVAL = (SV *)newRV_noinc ((SV *)av);
853 while (i--)
854 {
855 int h = *hv84++;
856 int v1 = *hv84++;
857 int v2 = *hv84++;
858
859 av_push (av, newSViv (v1));
860 av_push (av, newSViv ((h >> 4) * 255 / 15));
861 av_push (av, newSViv (v2));
862 av_push (av, newSViv ((h & 15) * 255 / 15));
863 }
864}
865 OUTPUT:
866 RETVAL
867
868#############################################################################
869
870MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
871
872SV *
873extract_features (SV *ar)
874 CODE:
875{
876 int i;
877 AV *av, *result;
878
879 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
880 croak ("Not an array ref as first argument to extract_features");
881
882 av = (AV *) SvRV (ar);
883 result = newAV ();
884
885 for (i = 0; i <= av_len (av); ++i)
886 {
887 SV *sv = *av_fetch (av, i, 1);
888 SV *histsv = newSV (9 * sizeof (float) + 1);
889
890 SvPOK_on (histsv);
891 SvCUR_set (histsv, 9 * sizeof (float));
892 float *hist = (float *)SvPVX (histsv);
893
894 struct feature f_h, f_s, f_v;
895 feature_init (&f_h);
896 feature_init (&f_s);
897 feature_init (&f_v);
898
899 {
900 STRLEN len;
901 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
902 while (len >= 3)
903 {
904 unsigned int r, g, b, h, s, v;
905 r = *buf++; g = *buf++; b = *buf++;
906 rgb_to_hsv (r, g, b, &h, &s, &v);
907
908 feature_update_pass_1 (&f_h, h);
909 feature_update_pass_1 (&f_s, s);
910 feature_update_pass_1 (&f_v, v);
911
912 len -= 3;
913 }
914
915 feature_finish_pass_1 (&f_h);
916 feature_finish_pass_1 (&f_s);
917 feature_finish_pass_1 (&f_v);
918 }
919
920 {
921 STRLEN len;
922 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
923 while (len >= 3)
924 {
925 unsigned int r, g, b, h, s, v;
926 r = *buf++; g = *buf++; b = *buf++;
927 rgb_to_hsv (r, g, b, &h, &s, &v);
928
929 feature_update_pass_2 (&f_h, h);
930 feature_update_pass_2 (&f_s, s);
931 feature_update_pass_2 (&f_v, v);
932
933 len -= 3;
934 }
935
936 feature_finish_pass_2 (&f_h);
937 feature_finish_pass_2 (&f_s);
938 feature_finish_pass_2 (&f_v);
939 }
940
941 hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
942 hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
943 hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
944
945 av_push (result, histsv);
946 }
947
948 RETVAL = newRV_noinc ((SV *)result);
949}
950 OUTPUT:
951 RETVAL
952

Diff Legend

Removed lines
+ Added lines
< Changed lines
> Changed lines