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Comparing CV/CV.xs (file contents):
Revision 1.19 by root, Wed Jul 20 22:33:01 2005 UTC vs.
Revision 1.44 by root, Sun Dec 30 16:23:23 2012 UTC

… …
2#include "perl.h" 2#include "perl.h"
3#include "XSUB.h" 3#include "XSUB.h"
4 4
5#include <string.h> 5#include <string.h>
6#include <setjmp.h> 6#include <setjmp.h>
7#include <math.h>
8
9#include <magic.h>
7 10
8#include <jpeglib.h> 11#include <jpeglib.h>
12#include <glib.h>
13#include <gtk/gtk.h>
9#include <gdk-pixbuf/gdk-pixbuf.h> 14#include <gdk-pixbuf/gdk-pixbuf.h>
10 15
11#include <gperl.h> 16#include <gperl.h>
12#include <gtk2perl.h> 17#include <gtk2perl.h>
13 18
19#include <assert.h>
20
14#define IW 80 /* MUST match Schnauer.pm! */ 21#define IW 80 /* MUST match Schnauzer.pm! */
15#define IH 60 /* MUST match Schnauer.pm! */ 22#define IH 60 /* MUST match Schnauzer.pm! */
16 23
17#define RAND (seed = (seed + 7141) * 54773 % 134456) 24#define RAND (seed = (seed + 7141) * 54773 % 134456)
18 25
19#define LINELENGTH 240 26#define LINELENGTH 240
20 27
21#define ELLIPSIS "\xe2\x80\xa6" 28#define ELLIPSIS "\xe2\x80\xa6"
29
30typedef char *octet_string;
22 31
23struct jpg_err_mgr 32struct jpg_err_mgr
24{ 33{
25 struct jpeg_error_mgr err; 34 struct jpeg_error_mgr err;
26 jmp_buf setjmp_buffer; 35 jmp_buf setjmp_buffer;
… …
63 72
64 *h &= 255; 73 *h &= 255;
65 } 74 }
66} 75}
67 76
77struct feature {
78 float v1, v2, v3; // mean, square, cube
79 int n;
80};
81
82static void
83feature_init (struct feature *f)
84{
85 f->v1 = 0.;
86 f->v2 = 0.;
87 f->v3 = 0.;
88 f->n = 0;
89}
90
91// didn't find an algorithm to neatly do mean, variance and skew in one pass.
92// elmex ist schuld.
93static void
94feature_update_pass_1 (struct feature *f, unsigned int v)
95{
96 f->v1 += v;
97 f->n += 1;
98}
99
100static void
101feature_finish_pass_1 (struct feature *f)
102{
103 if (f->n < 1)
104 return;
105
106 f->v1 /= f->n;
107}
108
109static void
110feature_update_pass_2 (struct feature *f, unsigned int v)
111{
112 float d = v - f->v1;
113
114 f->v2 += d * d;
115 f->v3 += d * d * d;
116}
117
118static void
119feature_finish_pass_2 (struct feature *f)
120{
121 if (f->n < 1)
122 return;
123
124 f->v2 /= f->n;
125 f->v3 /= f->n;
126
127 f->v1 /= 255.;
128 f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
129 f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
130}
131
68static guint32 a85_val; 132static guint32 a85_val;
69static guint a85_cnt; 133static guint a85_cnt;
70static guchar a85_buf[LINELENGTH], *a85_ptr; 134static guchar a85_buf[LINELENGTH], *a85_ptr;
71 135
72static void 136static void
… …
124 188
125MODULE = Gtk2::CV PACKAGE = Gtk2::CV 189MODULE = Gtk2::CV PACKAGE = Gtk2::CV
126 190
127PROTOTYPES: ENABLE 191PROTOTYPES: ENABLE
128 192
193# missing function in perl. really :)
194int
195common_prefix_length (a, b)
196 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
197 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
198 CODE:
199 RETVAL = 0;
200
201 while (*a == *b && *a)
202 {
203 RETVAL += (*a & 0xc0) != 0x80;
204 a++, b++;
205 }
206
207 OUTPUT:
208 RETVAL
209
210const char *
211magic (octet_string path)
212 CODE:
213{
214 static magic_t cookie;
215
216 if (!cookie)
217 {
218 cookie = magic_open (MAGIC_NONE);
219
220 if (cookie)
221 magic_load (cookie, 0);
222 else
223 XSRETURN_UNDEF;
224 }
225
226 RETVAL = magic_file (cookie, path);
227}
228 OUTPUT:
229 RETVAL
230
231const char *
232magic_mime (octet_string path)
233 CODE:
234{
235 static magic_t cookie;
236
237 if (!cookie)
238 {
239 cookie = magic_open (MAGIC_MIME);
240
241 if (cookie)
242 magic_load (cookie, 0);
243 else
244 XSRETURN_UNDEF;
245 }
246
247 RETVAL = magic_file (cookie, path);
248}
249 OUTPUT:
250 RETVAL
251
252# missing/broken in Gtk2 perl module
253
254void
255gdk_window_clear_hints (GdkWindow *window)
256 CODE:
257 gdk_window_set_geometry_hints (window, 0, 0);
258
259gboolean
260gdk_net_wm_supports (GdkAtom property)
261 CODE:
262#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
263 RETVAL = gdk_net_wm_supports (property);
264#else
265 RETVAL = 0;
266#endif
267 OUTPUT:
268 RETVAL
269
129GdkPixbuf_noinc * 270GdkPixbuf_noinc *
130transpose (GdkPixbuf *pb) 271dealpha_expose (GdkPixbuf *pb)
131 CODE: 272 CODE:
132{ 273{
133 int w = gdk_pixbuf_get_width (pb); 274 int w = gdk_pixbuf_get_width (pb);
134 int h = gdk_pixbuf_get_height (pb); 275 int h = gdk_pixbuf_get_height (pb);
135 int bpp = gdk_pixbuf_get_n_channels (pb); 276 int bpp = gdk_pixbuf_get_n_channels (pb);
136 int x, y, i; 277 int x, y, i;
137 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 278 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
138 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 279 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
139 280
140 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); 281 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
141 282
142 dst = gdk_pixbuf_get_pixels (RETVAL); 283 dst = gdk_pixbuf_get_pixels (RETVAL);
143 dstr = gdk_pixbuf_get_rowstride (RETVAL); 284 dstr = gdk_pixbuf_get_rowstride (RETVAL);
144 285
145 for (y = 0; y < h; y++)
146 for (x = 0; x < w; x++) 286 for (x = 0; x < w; x++)
287 for (y = 0; y < h; y++)
147 for (i = 0; i < bpp; i++) 288 for (i = 0; i < 3; i++)
148 dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i]; 289 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
149} 290}
150 OUTPUT: 291 OUTPUT:
151 RETVAL 292 RETVAL
152 293
153GdkPixbuf_noinc * 294GdkPixbuf_noinc *
154flop (GdkPixbuf *pb) 295rotate (GdkPixbuf *pb, int angle)
155 CODE: 296 CODE:
156{ 297 if (angle < 0)
157 int w = gdk_pixbuf_get_width (pb); 298 angle += 360;
158 int h = gdk_pixbuf_get_height (pb); 299 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
159 int bpp = gdk_pixbuf_get_n_channels (pb); 300 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
160 int x, y, i; 301 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
161 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 302 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
162 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 303 : angle);
163
164 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
165
166 dst = gdk_pixbuf_get_pixels (RETVAL);
167 dstr = gdk_pixbuf_get_rowstride (RETVAL);
168
169 for (y = 0; y < h; y++)
170 for (x = 0; x < w; x++)
171 for (i = 0; i < bpp; i++)
172 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
173}
174 OUTPUT: 304 OUTPUT:
175 RETVAL 305 RETVAL
176 306
177GdkPixbuf_noinc * 307GdkPixbuf_noinc *
178load_jpeg (char *path, int thumbnail=0) 308load_jpeg (SV *path, int thumbnail=0)
179 CODE: 309 CODE:
180{ 310{
181 struct jpeg_decompress_struct cinfo; 311 struct jpeg_decompress_struct cinfo;
182 struct jpg_err_mgr jerr; 312 struct jpg_err_mgr jerr;
183 guchar *data; 313 guchar *data;
184 int rs; 314 int rs;
185 FILE *fp; 315 FILE *fp;
186 volatile GdkPixbuf *pb = 0; 316 volatile GdkPixbuf *pb = 0;
317
187 RETVAL = 0; 318 RETVAL = 0;
188 319
189 if (!(fp = fopen (path, "rb"))) 320 fp = fopen (SvPVbyte_nolen (path), "rb");
321
322 if (!fp)
190 XSRETURN_UNDEF; 323 XSRETURN_UNDEF;
191 324
192 cinfo.err = jpeg_std_error (&jerr.err); 325 cinfo.err = jpeg_std_error (&jerr.err);
193 326
194 jerr.err.error_exit = cv_error_exit; 327 jerr.err.error_exit = cv_error_exit;
… …
225 { 358 {
226 cinfo.dct_method = JDCT_FASTEST; 359 cinfo.dct_method = JDCT_FASTEST;
227 cinfo.do_fancy_upsampling = FALSE; 360 cinfo.do_fancy_upsampling = FALSE;
228 361
229 while (cinfo.scale_denom < 8 362 while (cinfo.scale_denom < 8
230 && (cinfo.output_width >> 1) >= IW 363 && cinfo.output_width >= IW*4
231 && (cinfo.output_height >> 1) >= IH) 364 && cinfo.output_height >= IH*4)
232 { 365 {
233 cinfo.scale_denom <<= 1; 366 cinfo.scale_denom <<= 1;
234 jpeg_calc_output_dimensions (&cinfo); 367 jpeg_calc_output_dimensions (&cinfo);
235 } 368 }
236 } 369 }
… …
265 jpeg_destroy_decompress (&cinfo); 398 jpeg_destroy_decompress (&cinfo);
266} 399}
267 OUTPUT: 400 OUTPUT:
268 RETVAL 401 RETVAL
269 402
403void
404compare (GdkPixbuf *a, GdkPixbuf *b)
405 PPCODE:
406{
407 int w = gdk_pixbuf_get_width (a);
408 int h = gdk_pixbuf_get_height (a);
409
410 int sa = gdk_pixbuf_get_rowstride (a);
411 int sb = gdk_pixbuf_get_rowstride (b);
412
413 guchar *pa = gdk_pixbuf_get_pixels (a);
414 guchar *pb = gdk_pixbuf_get_pixels (b);
415
416 int x, y;
417
418 assert (w == gdk_pixbuf_get_width (b));
419 assert (h == gdk_pixbuf_get_height (b));
420
421 assert (gdk_pixbuf_get_n_channels (a) == 3);
422 assert (gdk_pixbuf_get_n_channels (b) == 3);
423
424 double diff = 0.;
425 int peak = 0;
426
427 if (w && h)
428 for (y = 0; y < h; y++)
429 {
430 guchar *pa_ = pa + y * sa;
431 guchar *pb_ = pb + y * sb;
432
433 for (x = 0; x < w; x++)
434 {
435 int d;
436
437 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
438 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
439 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
440 }
441 }
442
443 EXTEND (SP, 2);
444 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
445 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
446}
447
270############################################################################# 448#############################################################################
271 449
272MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 450MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
451
452# currently only works for filenames (octet strings)
273 453
274SV * 454SV *
275foldcase (SV *pathsv) 455foldcase (SV *pathsv)
276 PROTOTYPE: $ 456 PROTOTYPE: $
277 CODE: 457 CODE:
278{ 458{
279 STRLEN plen; 459 STRLEN plen;
280 U8 *path = SvPVutf8 (pathsv, plen); 460 U8 *path = (U8 *)SvPV (pathsv, plen);
281 U8 *pend = path + plen; 461 U8 *pend = path + plen;
282 U8 dst [plen * 6 * 3], *dstp = dst; 462 U8 dst [plen * 6 * 3], *dstp = dst;
283 463
284 while (path < pend) 464 while (path < pend)
285 { 465 {
286 U8 ch = *path; 466 U8 ch = *path;
287 467
288 if (ch >= 'a' && ch <= 'z') 468 if (ch >= 'a' && ch <= 'z')
289 *dstp++ = *path++; 469 *dstp++ = *path++;
470 else if (ch >= 'A' && ch <= 'Z')
471 *dstp++ = *path++ + ('a' - 'A');
290 else if (ch >= '0' && ch <= '9') 472 else if (ch >= '0' && ch <= '9')
291 { 473 {
292 STRLEN el, nl = 0; 474 STRLEN el, nl = 0;
293 while (*path >= '0' && *path <= '9' && path < pend) 475 while (*path >= '0' && *path <= '9' && path < pend)
294 path++, nl++; 476 path++, nl++;
… …
297 *dstp++ = '0'; 479 *dstp++ = '0';
298 480
299 memcpy (dstp, path - nl, nl); 481 memcpy (dstp, path - nl, nl);
300 dstp += nl; 482 dstp += nl;
301 } 483 }
484 else
485 *dstp++ = *path++;
486#if 0
302 else 487 else
303 { 488 {
304 STRLEN cl; 489 STRLEN cl;
305 to_utf8_fold (path, dstp, &cl); 490 to_utf8_fold (path, dstp, &cl);
306 dstp += cl; 491 dstp += cl;
307 path += is_utf8_char (path); 492 path += is_utf8_char (path);
308 } 493 }
494#endif
309 } 495 }
310 496
311 RETVAL = newSVpvn (dst, dstp - dst); 497 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
312} 498}
313 OUTPUT: 499 OUTPUT:
314 RETVAL 500 RETVAL
315 501
316GdkPixbuf_noinc * 502GdkPixbuf_noinc *
317p7_to_pb (int w, int h, guchar *src) 503p7_to_pb (int w, int h, SV *src_sv)
504 PROTOTYPE: @
318 CODE: 505 CODE:
319{ 506{
320 int x, y; 507 int x, y;
321 guchar *dst, *d; 508 guchar *dst, *d;
322 int dstr; 509 int dstr;
510 guchar *src = (guchar *)SvPVbyte_nolen (src_sv);
323 511
324 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); 512 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
325 dst = gdk_pixbuf_get_pixels (RETVAL); 513 dst = gdk_pixbuf_get_pixels (RETVAL);
326 dstr = gdk_pixbuf_get_rowstride (RETVAL); 514 dstr = gdk_pixbuf_get_rowstride (RETVAL);
327 515
… …
336 } 524 }
337} 525}
338 OUTPUT: 526 OUTPUT:
339 RETVAL 527 RETVAL
340 528
529#############################################################################
530
531MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
532
533void
534dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
535 CODE:
536{
537 int w = gdk_pixbuf_get_width (pb);
538 int h = gdk_pixbuf_get_height (pb);
539 int x, y, i;
540 guchar *dst;
541 int bpp = gdk_pixbuf_get_n_channels (pb);
542 guchar *src = gdk_pixbuf_get_pixels (pb);
543 int sstr = gdk_pixbuf_get_rowstride (pb);
544
545 a85_init ();
546
547 for (y = 0; y < h; y++)
548 for (x = 0; x < w; x++)
549 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
550 a85_push (fp, src [x * bpp + y * sstr + i]);
551
552 a85_finish (fp);
553}
554
555void
556dump_binary (PerlIO *fp, GdkPixbuf *pb)
557 CODE:
558{
559 int w = gdk_pixbuf_get_width (pb);
560 int h = gdk_pixbuf_get_height (pb);
561 int x, y, i;
562 guchar *dst;
563 int bpp = gdk_pixbuf_get_n_channels (pb);
564 guchar *src = gdk_pixbuf_get_pixels (pb);
565 int sstr = gdk_pixbuf_get_rowstride (pb);
566
567 for (y = 0; y < h; y++)
568 for (x = 0; x < w; x++)
569 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
570 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
571}
572
573#############################################################################
574
575MODULE = Gtk2::CV PACKAGE = Gtk2::CV
576
341SV * 577SV *
342pb_to_p7 (GdkPixbuf *pb) 578pb_to_hv84 (GdkPixbuf *pb)
343 CODE: 579 CODE:
344{ 580{
345 int w = gdk_pixbuf_get_width (pb); 581 int w = gdk_pixbuf_get_width (pb);
346 int h = gdk_pixbuf_get_height (pb); 582 int h = gdk_pixbuf_get_height (pb);
347 int x, y; 583 int x, y;
348 guchar *dst; 584 guchar *dst;
349 int bpp = gdk_pixbuf_get_n_channels (pb); 585 int bpp = gdk_pixbuf_get_n_channels (pb);
350 guchar *src = gdk_pixbuf_get_pixels (pb); 586 guchar *src = gdk_pixbuf_get_pixels (pb);
351 int sstr = gdk_pixbuf_get_rowstride (pb); 587 int sstr = gdk_pixbuf_get_rowstride (pb);
352 int Er[IW], Eg[IW], Eb[IW];
353 int seed = 77;
354
355 RETVAL = newSV (w * h);
356 SvPOK_only (RETVAL);
357 SvCUR_set (RETVAL, w * h);
358
359 dst = SvPVX (RETVAL);
360
361 memset (Er, 0, sizeof (int) * IW);
362 memset (Eg, 0, sizeof (int) * IW);
363 memset (Eb, 0, sizeof (int) * IW);
364
365 /* some primitive error distribution + random dithering */
366
367 for (y = 0; y < h; y++)
368 {
369 int er = 0, eg = 0, eb = 0;
370
371 for (x = 0; x < w; x++)
372 {
373 int r, g, b;
374 guchar *p = src + x * bpp + y * sstr;
375
376 r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
377 g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
378 b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
379
380 r = r > 7 ? 7 : r < 0 ? 0 : r;
381 g = g > 7 ? 7 : g < 0 ? 0 : g;
382 b = b > 3 ? 3 : b < 0 ? 0 : b;
383
384 er += p[0] - (r * 255 + 4) / 7;
385 eg += p[1] - (g * 255 + 4) / 7;
386 eb += p[2] - (b * 255 + 2) / 3;
387
388 Er[x] = er >> 1; er -= (er + 1) >> 1;
389 Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
390 Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
391
392 *dst++ = r << 5 | g << 2 | b;
393 }
394 }
395}
396 OUTPUT:
397 RETVAL
398
399SV *
400make_histogram (SV *ar)
401 CODE:
402{
403 int i;
404 AV *av, *result;
405
406 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
407 croak ("Not an array ref as first argument to make_histogram");
408
409 av = (AV *) SvRV (ar);
410 result = newAV ();
411
412 for (i = 0; i <= av_len (av); ++i)
413 {
414 const int HISTSIZE = 64;
415
416 int j;
417 SV *sv = *av_fetch (av, i, 1);
418 STRLEN len;
419 char *buf = SvPVbyte (sv, len);
420
421 int tmphist[HISTSIZE];
422 float *hist;
423
424 SV *histsv = newSV (HISTSIZE * sizeof (float) + 1);
425 SvPOK_on (histsv);
426 SvCUR_set (histsv, HISTSIZE * sizeof (float));
427 hist = (float *)SvPVX (histsv);
428
429 Zero (tmphist, sizeof (tmphist), char);
430
431 for (j = len; j--; )
432 {
433 unsigned int idx
434 = ((*buf & 0xc0) >> 2)
435 | ((*buf & 0x18) >> 1)
436 | (*buf & 0x03);
437
438 ++tmphist[idx];
439 ++buf;
440 }
441
442 for (j = 0; j < HISTSIZE; ++j)
443 hist[j] = (float)tmphist[j] / (len + 1e-30);
444
445 av_push (result, histsv);
446 }
447
448 RETVAL = newRV_noinc ((SV *)result);
449}
450 OUTPUT:
451 RETVAL
452
453#############################################################################
454
455MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
456
457void
458dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
459 CODE:
460{
461 int w = gdk_pixbuf_get_width (pb);
462 int h = gdk_pixbuf_get_height (pb);
463 int x, y, i;
464 guchar *dst;
465 int bpp = gdk_pixbuf_get_n_channels (pb);
466 guchar *src = gdk_pixbuf_get_pixels (pb);
467 int sstr = gdk_pixbuf_get_rowstride (pb);
468
469 a85_init ();
470
471 for (y = 0; y < h; y++)
472 for (x = 0; x < w; x++)
473 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
474 a85_push (fp, src [x * bpp + y * sstr + i]);
475
476 a85_finish (fp);
477}
478
479void
480dump_binary (PerlIO *fp, GdkPixbuf *pb)
481 CODE:
482{
483 int w = gdk_pixbuf_get_width (pb);
484 int h = gdk_pixbuf_get_height (pb);
485 int x, y, i;
486 guchar *dst;
487 int bpp = gdk_pixbuf_get_n_channels (pb);
488 guchar *src = gdk_pixbuf_get_pixels (pb);
489 int sstr = gdk_pixbuf_get_rowstride (pb);
490
491 for (y = 0; y < h; y++)
492 for (x = 0; x < w; x++)
493 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
494 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
495}
496
497#############################################################################
498
499MODULE = Gtk2::CV PACKAGE = Gtk2::CV
500
501SV *
502pb_to_hv84 (GdkPixbuf *pb)
503 CODE:
504{
505 int w = gdk_pixbuf_get_width (pb);
506 int h = gdk_pixbuf_get_height (pb);
507 int x, y;
508 guchar *dst;
509 int bpp = gdk_pixbuf_get_n_channels (pb);
510 guchar *src = gdk_pixbuf_get_pixels (pb);
511 int sstr = gdk_pixbuf_get_rowstride (pb);
512 588
513 RETVAL = newSV (6 * 8 * 12 / 8); 589 RETVAL = newSV (6 * 8 * 12 / 8);
514 SvPOK_only (RETVAL); 590 SvPOK_only (RETVAL);
515 SvCUR_set (RETVAL, 6 * 8 * 12 / 8); 591 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
516 592
517 dst = SvPVX (RETVAL); 593 dst = (guchar *)SvPVX (RETVAL);
518 594
519 /* some primitive error distribution + random dithering */ 595 /* some primitive error distribution + random dithering */
520 596
521 for (y = 0; y < h; y++) 597 for (y = 0; y < h; y++)
522 { 598 {
… …
580 } 656 }
581} 657}
582 OUTPUT: 658 OUTPUT:
583 RETVAL 659 RETVAL
584 660
661#############################################################################
585 662
663MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
586 664
665SV *
666extract_features (SV *ar)
667 CODE:
668{
669 int i;
670 AV *av, *result;
671
672 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
673 croak ("Not an array ref as first argument to extract_features");
674
675 av = (AV *) SvRV (ar);
676 result = newAV ();
677
678 for (i = 0; i <= av_len (av); ++i)
679 {
680 SV *sv = *av_fetch (av, i, 1);
681 SV *histsv = newSV (9 * sizeof (float) + 1);
682
683 SvPOK_on (histsv);
684 SvCUR_set (histsv, 9 * sizeof (float));
685 float *hist = (float *)SvPVX (histsv);
686
687 struct feature f_h, f_s, f_v;
688 feature_init (&f_h);
689 feature_init (&f_s);
690 feature_init (&f_v);
691
692 {
693 STRLEN len;
694 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
695 while (len >= 3)
696 {
697 unsigned int r, g, b, h, s, v;
698 r = *buf++; g = *buf++; b = *buf++;
699 rgb_to_hsv (r, g, b, &h, &s, &v);
700
701 feature_update_pass_1 (&f_h, h);
702 feature_update_pass_1 (&f_s, s);
703 feature_update_pass_1 (&f_v, v);
704
705 len -= 3;
706 }
707
708 feature_finish_pass_1 (&f_h);
709 feature_finish_pass_1 (&f_s);
710 feature_finish_pass_1 (&f_v);
711 }
712
713 {
714 STRLEN len;
715 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
716 while (len >= 3)
717 {
718 unsigned int r, g, b, h, s, v;
719 r = *buf++; g = *buf++; b = *buf++;
720 rgb_to_hsv (r, g, b, &h, &s, &v);
721
722 feature_update_pass_2 (&f_h, h);
723 feature_update_pass_2 (&f_s, s);
724 feature_update_pass_2 (&f_v, v);
725
726 len -= 3;
727 }
728
729 feature_finish_pass_2 (&f_h);
730 feature_finish_pass_2 (&f_s);
731 feature_finish_pass_2 (&f_v);
732 }
733
734 hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
735 hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
736 hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
737
738 av_push (result, histsv);
739 }
740
741 RETVAL = newRV_noinc ((SV *)result);
742}
743 OUTPUT:
744 RETVAL
745

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