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

Comparing CV/CV.xs (file contents):
Revision 1.27 by root, Sun Aug 21 02:23:52 2005 UTC vs.
Revision 1.48 by root, Wed May 24 05:00:57 2017 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>
9#include <glib.h> 12#include <glib.h>
10#include <gtk/gtk.h> 13#include <gtk/gtk.h>
11#include <gdk-pixbuf/gdk-pixbuf.h> 14#include <gdk-pixbuf/gdk-pixbuf.h>
12 15
13#include <gperl.h> 16#include <gperl.h>
14#include <gtk2perl.h> 17#include <gtk2perl.h>
15 18
19#include <assert.h>
20
21#include "perlmulticore.h"
22
16#define IW 80 /* MUST match Schnauer.pm! */ 23#define IW 80 /* MUST match Schnauzer.pm! */
17#define IH 60 /* MUST match Schnauer.pm! */ 24#define IH 60 /* MUST match Schnauzer.pm! */
18 25
19#define RAND (seed = (seed + 7141) * 54773 % 134456) 26#define RAND (seed = (seed + 7141) * 54773 % 134456)
20 27
21#define LINELENGTH 240 28#define LINELENGTH 240
22 29
23#define ELLIPSIS "\xe2\x80\xa6" 30#define ELLIPSIS "\xe2\x80\xa6"
31
32typedef char *octet_string;
24 33
25struct jpg_err_mgr 34struct jpg_err_mgr
26{ 35{
27 struct jpeg_error_mgr err; 36 struct jpeg_error_mgr err;
28 jmp_buf setjmp_buffer; 37 jmp_buf setjmp_buffer;
29}; 38};
30 39
31static void 40static void
32cv_error_exit (j_common_ptr cinfo) 41cv_error_exit (j_common_ptr cinfo)
33{ 42{
43 cinfo->err->output_message (cinfo);
34 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); 44 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
35} 45}
36 46
37static void 47static void
38cv_error_output (j_common_ptr cinfo) 48cv_error_output (j_common_ptr cinfo)
39{ 49{
50 char msg[JMSG_LENGTH_MAX];
51
52 cinfo->err->format_message (cinfo, msg);
53
54 fprintf (stderr, "JPEG decoding error: %s\n", msg);
40 return; 55 return;
41} 56}
42 57
43static void 58static void
44rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, 59rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
… …
65 80
66 *h &= 255; 81 *h &= 255;
67 } 82 }
68} 83}
69 84
85struct feature {
86 float v1, v2, v3; // mean, square, cube
87 int n;
88};
89
90static void
91feature_init (struct feature *f)
92{
93 f->v1 = 0.;
94 f->v2 = 0.;
95 f->v3 = 0.;
96 f->n = 0;
97}
98
99// didn't find an algorithm to neatly do mean, variance and skew in one pass.
100// elmex ist schuld.
101static void
102feature_update_pass_1 (struct feature *f, unsigned int v)
103{
104 f->v1 += v;
105 f->n += 1;
106}
107
108static void
109feature_finish_pass_1 (struct feature *f)
110{
111 if (f->n < 1)
112 return;
113
114 f->v1 /= f->n;
115}
116
117static void
118feature_update_pass_2 (struct feature *f, unsigned int v)
119{
120 float d = v - f->v1;
121
122 f->v2 += d * d;
123 f->v3 += d * d * d;
124}
125
126static void
127feature_finish_pass_2 (struct feature *f)
128{
129 if (f->n < 1)
130 return;
131
132 f->v2 /= f->n;
133 f->v3 /= f->n;
134
135 f->v1 /= 255.;
136 f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
137 f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
138}
139
70static guint32 a85_val; 140static guint32 a85_val;
71static guint a85_cnt; 141static guint a85_cnt;
72static guchar a85_buf[LINELENGTH], *a85_ptr; 142static guchar a85_buf[LINELENGTH], *a85_ptr;
73 143
74static void 144static void
… …
126 196
127MODULE = Gtk2::CV PACKAGE = Gtk2::CV 197MODULE = Gtk2::CV PACKAGE = Gtk2::CV
128 198
129PROTOTYPES: ENABLE 199PROTOTYPES: ENABLE
130 200
201# missing function in perl. really :)
202int
203common_prefix_length (a, b)
204 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
205 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
206 CODE:
207 RETVAL = 0;
208
209 while (*a == *b && *a)
210 {
211 RETVAL += (*a & 0xc0) != 0x80;
212 a++, b++;
213 }
214
215 OUTPUT:
216 RETVAL
217
218const char *
219magic (octet_string path)
220 CODE:
221{
222 static magic_t cookie;
223
224 if (!cookie)
225 {
226 cookie = magic_open (MAGIC_SYMLINK);
227
228 if (cookie)
229 magic_load (cookie, 0);
230 else
231 XSRETURN_UNDEF;
232 }
233
234 RETVAL = magic_file (cookie, path);
235}
236 OUTPUT:
237 RETVAL
238
239const char *
240magic_mime (octet_string path)
241 CODE:
242{
243 static magic_t cookie;
244
245 if (!cookie)
246 {
247 cookie = magic_open (MAGIC_MIME | MAGIC_SYMLINK);
248
249 if (cookie)
250 magic_load (cookie, 0);
251 else
252 XSRETURN_UNDEF;
253 }
254
255 perlinterp_release ();
256 RETVAL = magic_file (cookie, path);
257 perlinterp_acquire ();
258}
259 OUTPUT:
260 RETVAL
261
131# missing in Gtk2 perl module 262# missing/broken in Gtk2 perl module
263
264void
265gdk_window_clear_hints (GdkWindow *window)
266 CODE:
267 gdk_window_set_geometry_hints (window, 0, 0);
132 268
133gboolean 269gboolean
134gdk_net_wm_supports (GdkAtom property) 270gdk_net_wm_supports (GdkAtom property)
135 CODE: 271 CODE:
136#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) 272#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
… …
142 RETVAL 278 RETVAL
143 279
144GdkPixbuf_noinc * 280GdkPixbuf_noinc *
145dealpha_expose (GdkPixbuf *pb) 281dealpha_expose (GdkPixbuf *pb)
146 CODE: 282 CODE:
283 perlinterp_release ();
147{ 284{
148 int w = gdk_pixbuf_get_width (pb); 285 int w = gdk_pixbuf_get_width (pb);
149 int h = gdk_pixbuf_get_height (pb); 286 int h = gdk_pixbuf_get_height (pb);
150 int bpp = gdk_pixbuf_get_n_channels (pb); 287 int bpp = gdk_pixbuf_get_n_channels (pb);
151 int x, y, i; 288 int x, y, i;
… …
160 for (x = 0; x < w; x++) 297 for (x = 0; x < w; x++)
161 for (y = 0; y < h; y++) 298 for (y = 0; y < h; y++)
162 for (i = 0; i < 3; i++) 299 for (i = 0; i < 3; i++)
163 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i]; 300 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
164} 301}
302 perlinterp_acquire ();
165 OUTPUT: 303 OUTPUT:
166 RETVAL 304 RETVAL
167 305
168GdkPixbuf_noinc * 306GdkPixbuf_noinc *
169transpose (GdkPixbuf *pb) 307rotate (GdkPixbuf *pb, int angle)
170 CODE: 308 CODE:
171{ 309 perlinterp_release ();
172 int w = gdk_pixbuf_get_width (pb); 310 if (angle < 0)
173 int h = gdk_pixbuf_get_height (pb); 311 angle += 360;
174 int bpp = gdk_pixbuf_get_n_channels (pb); 312 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
175 int x, y, i; 313 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
176 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 314 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
177 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 315 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
178 316 : angle);
179 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); 317 perlinterp_acquire ();
180
181 dst = gdk_pixbuf_get_pixels (RETVAL);
182 dstr = gdk_pixbuf_get_rowstride (RETVAL);
183
184 for (y = 0; y < h; y++)
185 for (x = 0; x < w; x++)
186 for (i = 0; i < bpp; i++)
187 dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];
188}
189 OUTPUT: 318 OUTPUT:
190 RETVAL 319 RETVAL
191 320
192GdkPixbuf_noinc * 321GdkPixbuf_noinc *
193flop (GdkPixbuf *pb) 322load_jpeg (SV *path, int thumbnail = 0, int iw = 0, int ih = 0)
194 CODE:
195{
196 int w = gdk_pixbuf_get_width (pb);
197 int h = gdk_pixbuf_get_height (pb);
198 int bpp = gdk_pixbuf_get_n_channels (pb);
199 int x, y, i;
200 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
201 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
202
203 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
204
205 dst = gdk_pixbuf_get_pixels (RETVAL);
206 dstr = gdk_pixbuf_get_rowstride (RETVAL);
207
208 for (y = 0; y < h; y++)
209 for (x = 0; x < w; x++)
210 for (i = 0; i < bpp; i++)
211 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
212}
213 OUTPUT:
214 RETVAL
215
216GdkPixbuf_noinc *
217load_jpeg (SV *path, int thumbnail=0)
218 CODE: 323 CODE:
219{ 324{
220 struct jpeg_decompress_struct cinfo; 325 struct jpeg_decompress_struct cinfo;
221 struct jpg_err_mgr jerr; 326 struct jpg_err_mgr jerr;
222 guchar *data; 327 guchar *data;
223 int rs; 328 int rs;
224 FILE *fp; 329 FILE *fp;
225 volatile GdkPixbuf *pb = 0; 330 volatile GdkPixbuf *pb = 0;
226 gchar *filename;
227 331
228 RETVAL = 0; 332 RETVAL = 0;
229 333
230 filename = g_filename_from_utf8 (SvPVutf8_nolen (path), -1, 0, 0, 0);
231 fp = fopen (filename, "rb"); 334 fp = fopen (SvPVbyte_nolen (path), "rb");
232 g_free (filename);
233 335
234 if (!fp) 336 if (!fp)
235 XSRETURN_UNDEF; 337 XSRETURN_UNDEF;
236 338
339 perlinterp_release ();
340
237 cinfo.err = jpeg_std_error (&jerr.err); 341 cinfo.err = jpeg_std_error (&jerr.err);
238 342
239 jerr.err.error_exit = cv_error_exit; 343 jerr.err.error_exit = cv_error_exit;
240 jerr.err.output_message = cv_error_output; 344 jerr.err.output_message = cv_error_output;
241 345
… …
245 jpeg_destroy_decompress (&cinfo); 349 jpeg_destroy_decompress (&cinfo);
246 350
247 if (pb) 351 if (pb)
248 g_object_unref ((gpointer)pb); 352 g_object_unref ((gpointer)pb);
249 353
354 perlinterp_acquire ();
250 XSRETURN_UNDEF; 355 XSRETURN_UNDEF;
251 } 356 }
252 357
253 jpeg_create_decompress (&cinfo); 358 jpeg_create_decompress (&cinfo);
254 359
… …
270 { 375 {
271 cinfo.dct_method = JDCT_FASTEST; 376 cinfo.dct_method = JDCT_FASTEST;
272 cinfo.do_fancy_upsampling = FALSE; 377 cinfo.do_fancy_upsampling = FALSE;
273 378
274 while (cinfo.scale_denom < 8 379 while (cinfo.scale_denom < 8
275 && cinfo.output_width >= IW*4 380 && cinfo.output_width >= iw*4
276 && cinfo.output_height >= IH*4) 381 && cinfo.output_height >= ih*4)
277 { 382 {
278 cinfo.scale_denom <<= 1; 383 cinfo.scale_denom <<= 1;
279 jpeg_calc_output_dimensions (&cinfo); 384 jpeg_calc_output_dimensions (&cinfo);
280 } 385 }
281 } 386 }
282 387
388 if (cinfo.output_components != 3)
389 longjmp (jerr.setjmp_buffer, 3);
390
391 if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK)
392 {
393 cinfo.out_color_space = JCS_CMYK;
394 cinfo.output_components = 4;
395 }
396
283 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height); 397 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
284 if (!RETVAL) 398 if (!RETVAL)
285 longjmp (jerr.setjmp_buffer, 2); 399 longjmp (jerr.setjmp_buffer, 2);
286 400
287 data = gdk_pixbuf_get_pixels (RETVAL); 401 data = gdk_pixbuf_get_pixels (RETVAL);
288 rs = gdk_pixbuf_get_rowstride (RETVAL); 402 rs = gdk_pixbuf_get_rowstride (RETVAL);
289
290 if (cinfo.output_components != 3)
291 longjmp (jerr.setjmp_buffer, 3);
292 403
293 jpeg_start_decompress (&cinfo); 404 jpeg_start_decompress (&cinfo);
294 405
295 while (cinfo.output_scanline < cinfo.output_height) 406 while (cinfo.output_scanline < cinfo.output_height)
296 { 407 {
… …
303 rp [3] = (guchar *)rp [2] + rs; 414 rp [3] = (guchar *)rp [2] + rs;
304 415
305 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); 416 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
306 } 417 }
307 418
419 if (cinfo.out_color_space == JCS_CMYK)
420 {
421 guchar *end = data + cinfo.output_height * rs;
422
423 while (data < end)
424 {
425 U32 c = data [0];
426 U32 m = data [1];
427 U32 y = data [2];
428 U32 k = data [3];
429
430 data [0] = c * k / 255;
431 data [1] = m * k / 255;
432 data [2] = y * k / 255;
433 data [3] = 255;
434
435 data += 4;
436 }
437 }
438
308 jpeg_finish_decompress (&cinfo); 439 jpeg_finish_decompress (&cinfo);
309 fclose (fp); 440 fclose (fp);
310 jpeg_destroy_decompress (&cinfo); 441 jpeg_destroy_decompress (&cinfo);
442 perlinterp_acquire ();
311} 443}
312 OUTPUT: 444 OUTPUT:
313 RETVAL 445 RETVAL
446
447void
448compare (GdkPixbuf *a, GdkPixbuf *b)
449 PPCODE:
450 perlinterp_release ();
451{
452 int w = gdk_pixbuf_get_width (a);
453 int h = gdk_pixbuf_get_height (a);
454
455 int sa = gdk_pixbuf_get_rowstride (a);
456 int sb = gdk_pixbuf_get_rowstride (b);
457
458 guchar *pa = gdk_pixbuf_get_pixels (a);
459 guchar *pb = gdk_pixbuf_get_pixels (b);
460
461 int x, y;
462
463 assert (w == gdk_pixbuf_get_width (b));
464 assert (h == gdk_pixbuf_get_height (b));
465
466 assert (gdk_pixbuf_get_n_channels (a) == 3);
467 assert (gdk_pixbuf_get_n_channels (b) == 3);
468
469 double diff = 0.;
470 int peak = 0;
471
472 if (w && h)
473 for (y = 0; y < h; y++)
474 {
475 guchar *pa_ = pa + y * sa;
476 guchar *pb_ = pb + y * sb;
477
478 for (x = 0; x < w; x++)
479 {
480 int d;
481
482 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
483 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
484 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
485 }
486 }
487
488 perlinterp_acquire ();
489
490 EXTEND (SP, 2);
491 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
492 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
493}
314 494
315############################################################################# 495#############################################################################
316 496
317MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 497MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
498
499# currently only works for filenames (octet strings)
318 500
319SV * 501SV *
320foldcase (SV *pathsv) 502foldcase (SV *pathsv)
321 PROTOTYPE: $ 503 PROTOTYPE: $
322 CODE: 504 CODE:
323{ 505{
324 STRLEN plen; 506 STRLEN plen;
325 U8 *path = (U8 *)SvPVutf8 (pathsv, plen); 507 U8 *path = (U8 *)SvPV (pathsv, plen);
326 U8 *pend = path + plen; 508 U8 *pend = path + plen;
327 U8 dst [plen * 6 * 3], *dstp = dst; 509 U8 dst [plen * 6 * 3], *dstp = dst;
328 510
329 while (path < pend) 511 while (path < pend)
330 { 512 {
331 U8 ch = *path; 513 U8 ch = *path;
332 514
333 if (ch >= 'a' && ch <= 'z') 515 if (ch >= 'a' && ch <= 'z')
334 *dstp++ = *path++; 516 *dstp++ = *path++;
517 else if (ch >= 'A' && ch <= 'Z')
518 *dstp++ = *path++ + ('a' - 'A');
335 else if (ch >= '0' && ch <= '9') 519 else if (ch >= '0' && ch <= '9')
336 { 520 {
337 STRLEN el, nl = 0; 521 STRLEN el, nl = 0;
338 while (*path >= '0' && *path <= '9' && path < pend) 522 while (*path >= '0' && *path <= '9' && path < pend)
339 path++, nl++; 523 path++, nl++;
… …
342 *dstp++ = '0'; 526 *dstp++ = '0';
343 527
344 memcpy (dstp, path - nl, nl); 528 memcpy (dstp, path - nl, nl);
345 dstp += nl; 529 dstp += nl;
346 } 530 }
531 else
532 *dstp++ = *path++;
533#if 0
347 else 534 else
348 { 535 {
349 STRLEN cl; 536 STRLEN cl;
350 to_utf8_fold (path, dstp, &cl); 537 to_utf8_fold (path, dstp, &cl);
351 dstp += cl; 538 dstp += cl;
352 path += is_utf8_char (path); 539 path += is_utf8_char (path);
353 } 540 }
541#endif
354 } 542 }
355 543
356 RETVAL = newSVpvn ((const char *)dst, dstp - dst); 544 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
357} 545}
358 OUTPUT: 546 OUTPUT:
… …
383 } 571 }
384} 572}
385 OUTPUT: 573 OUTPUT:
386 RETVAL 574 RETVAL
387 575
576#############################################################################
577
578MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
579
580void
581dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
582 CODE:
583{
584 int w = gdk_pixbuf_get_width (pb);
585 int h = gdk_pixbuf_get_height (pb);
586 int x, y, i;
587 guchar *dst;
588 int bpp = gdk_pixbuf_get_n_channels (pb);
589 guchar *src = gdk_pixbuf_get_pixels (pb);
590 int sstr = gdk_pixbuf_get_rowstride (pb);
591
592 a85_init ();
593
594 for (y = 0; y < h; y++)
595 for (x = 0; x < w; x++)
596 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
597 a85_push (fp, src [x * bpp + y * sstr + i]);
598
599 a85_finish (fp);
600}
601
602void
603dump_binary (PerlIO *fp, GdkPixbuf *pb)
604 CODE:
605{
606 int w = gdk_pixbuf_get_width (pb);
607 int h = gdk_pixbuf_get_height (pb);
608 int x, y, i;
609 guchar *dst;
610 int bpp = gdk_pixbuf_get_n_channels (pb);
611 guchar *src = gdk_pixbuf_get_pixels (pb);
612 int sstr = gdk_pixbuf_get_rowstride (pb);
613
614 for (y = 0; y < h; y++)
615 for (x = 0; x < w; x++)
616 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
617 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
618}
619
620#############################################################################
621
622MODULE = Gtk2::CV PACKAGE = Gtk2::CV
623
388SV * 624SV *
389pb_to_p7 (GdkPixbuf *pb) 625pb_to_hv84 (GdkPixbuf *pb)
390 CODE: 626 CODE:
391{ 627{
392 int w = gdk_pixbuf_get_width (pb); 628 int w = gdk_pixbuf_get_width (pb);
393 int h = gdk_pixbuf_get_height (pb); 629 int h = gdk_pixbuf_get_height (pb);
394 int x, y; 630 int x, y;
395 guchar *dst; 631 guchar *dst;
396 int bpp = gdk_pixbuf_get_n_channels (pb); 632 int bpp = gdk_pixbuf_get_n_channels (pb);
397 guchar *src = gdk_pixbuf_get_pixels (pb); 633 guchar *src = gdk_pixbuf_get_pixels (pb);
398 int sstr = gdk_pixbuf_get_rowstride (pb); 634 int sstr = gdk_pixbuf_get_rowstride (pb);
399 int Er[IW], Eg[IW], Eb[IW];
400 int seed = 77;
401
402 RETVAL = newSV (w * h);
403 SvPOK_only (RETVAL);
404 SvCUR_set (RETVAL, w * h);
405
406 dst = (guchar *)SvPVX (RETVAL);
407
408 memset (Er, 0, sizeof (int) * IW);
409 memset (Eg, 0, sizeof (int) * IW);
410 memset (Eb, 0, sizeof (int) * IW);
411
412 /* some primitive error distribution + random dithering */
413
414 for (y = 0; y < h; y++)
415 {
416 int er = 0, eg = 0, eb = 0;
417
418 for (x = 0; x < w; x++)
419 {
420 int r, g, b;
421 guchar *p = src + x * bpp + y * sstr;
422
423 r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
424 g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
425 b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
426
427 r = r > 7 ? 7 : r < 0 ? 0 : r;
428 g = g > 7 ? 7 : g < 0 ? 0 : g;
429 b = b > 3 ? 3 : b < 0 ? 0 : b;
430
431 er += p[0] - (r * 255 + 4) / 7;
432 eg += p[1] - (g * 255 + 4) / 7;
433 eb += p[2] - (b * 255 + 2) / 3;
434
435 Er[x] = er >> 1; er -= (er + 1) >> 1;
436 Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
437 Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
438
439 *dst++ = r << 5 | g << 2 | b;
440 }
441 }
442}
443 OUTPUT:
444 RETVAL
445
446#############################################################################
447
448MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
449
450void
451dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
452 CODE:
453{
454 int w = gdk_pixbuf_get_width (pb);
455 int h = gdk_pixbuf_get_height (pb);
456 int x, y, i;
457 guchar *dst;
458 int bpp = gdk_pixbuf_get_n_channels (pb);
459 guchar *src = gdk_pixbuf_get_pixels (pb);
460 int sstr = gdk_pixbuf_get_rowstride (pb);
461
462 a85_init ();
463
464 for (y = 0; y < h; y++)
465 for (x = 0; x < w; x++)
466 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
467 a85_push (fp, src [x * bpp + y * sstr + i]);
468
469 a85_finish (fp);
470}
471
472void
473dump_binary (PerlIO *fp, GdkPixbuf *pb)
474 CODE:
475{
476 int w = gdk_pixbuf_get_width (pb);
477 int h = gdk_pixbuf_get_height (pb);
478 int x, y, i;
479 guchar *dst;
480 int bpp = gdk_pixbuf_get_n_channels (pb);
481 guchar *src = gdk_pixbuf_get_pixels (pb);
482 int sstr = gdk_pixbuf_get_rowstride (pb);
483
484 for (y = 0; y < h; y++)
485 for (x = 0; x < w; x++)
486 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
487 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
488}
489
490#############################################################################
491
492MODULE = Gtk2::CV PACKAGE = Gtk2::CV
493
494SV *
495pb_to_hv84 (GdkPixbuf *pb)
496 CODE:
497{
498 int w = gdk_pixbuf_get_width (pb);
499 int h = gdk_pixbuf_get_height (pb);
500 int x, y;
501 guchar *dst;
502 int bpp = gdk_pixbuf_get_n_channels (pb);
503 guchar *src = gdk_pixbuf_get_pixels (pb);
504 int sstr = gdk_pixbuf_get_rowstride (pb);
505 635
506 RETVAL = newSV (6 * 8 * 12 / 8); 636 RETVAL = newSV (6 * 8 * 12 / 8);
507 SvPOK_only (RETVAL); 637 SvPOK_only (RETVAL);
508 SvCUR_set (RETVAL, 6 * 8 * 12 / 8); 638 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
509 639
… …
578############################################################################# 708#############################################################################
579 709
580MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster 710MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
581 711
582SV * 712SV *
583make_histograms (SV *ar) 713extract_features (SV *ar)
584 CODE: 714 CODE:
585{ 715{
586 int i; 716 int i;
587 AV *av, *result; 717 AV *av, *result;
588 718
589 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) 719 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
590 croak ("Not an array ref as first argument to make_histogram"); 720 croak ("Not an array ref as first argument to extract_features");
591 721
592 av = (AV *) SvRV (ar); 722 av = (AV *) SvRV (ar);
593 result = newAV (); 723 result = newAV ();
594 724
595 for (i = 0; i <= av_len (av); ++i) 725 for (i = 0; i <= av_len (av); ++i)
596 { 726 {
597 const int HISTSIZE = 64;
598
599 int j;
600 SV *sv = *av_fetch (av, i, 1); 727 SV *sv = *av_fetch (av, i, 1);
601 STRLEN len;
602 char *buf = SvPVbyte (sv, len);
603
604 int tmphist[HISTSIZE];
605 float *hist;
606
607 SV *histsv = newSV (HISTSIZE * sizeof (float) + 1); 728 SV *histsv = newSV (9 * sizeof (float) + 1);
729
608 SvPOK_on (histsv); 730 SvPOK_on (histsv);
609 SvCUR_set (histsv, HISTSIZE * sizeof (float)); 731 SvCUR_set (histsv, 9 * sizeof (float));
610 hist = (float *)SvPVX (histsv); 732 float *hist = (float *)SvPVX (histsv);
611 733
612 Zero (tmphist, sizeof (tmphist), char); 734 struct feature f_h, f_s, f_v;
735 feature_init (&f_h);
736 feature_init (&f_s);
737 feature_init (&f_v);
613 738
614 for (j = len; j--; )
615 {
616 unsigned int idx
617 = ((*buf & 0xc0) >> 2)
618 | ((*buf & 0x18) >> 1)
619 | (*buf & 0x03);
620
621 ++tmphist[idx];
622 ++buf;
623 }
624 739 {
625 for (j = 0; j < HISTSIZE; ++j) 740 STRLEN len;
626 hist[j] = (float)tmphist[j] / (len + 1e-30); 741 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
742 while (len >= 3)
743 {
744 unsigned int r, g, b, h, s, v;
745 r = *buf++; g = *buf++; b = *buf++;
746 rgb_to_hsv (r, g, b, &h, &s, &v);
747
748 feature_update_pass_1 (&f_h, h);
749 feature_update_pass_1 (&f_s, s);
750 feature_update_pass_1 (&f_v, v);
751
752 len -= 3;
753 }
754
755 feature_finish_pass_1 (&f_h);
756 feature_finish_pass_1 (&f_s);
757 feature_finish_pass_1 (&f_v);
758 }
759
760 {
761 STRLEN len;
762 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
763 while (len >= 3)
764 {
765 unsigned int r, g, b, h, s, v;
766 r = *buf++; g = *buf++; b = *buf++;
767 rgb_to_hsv (r, g, b, &h, &s, &v);
768
769 feature_update_pass_2 (&f_h, h);
770 feature_update_pass_2 (&f_s, s);
771 feature_update_pass_2 (&f_v, v);
772
773 len -= 3;
774 }
775
776 feature_finish_pass_2 (&f_h);
777 feature_finish_pass_2 (&f_s);
778 feature_finish_pass_2 (&f_v);
779 }
780
781 hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
782 hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
783 hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
627 784
628 av_push (result, histsv); 785 av_push (result, histsv);
629 } 786 }
630 787
631 RETVAL = newRV_noinc ((SV *)result); 788 RETVAL = newRV_noinc ((SV *)result);
632} 789}
633 OUTPUT: 790 OUTPUT:
634 RETVAL 791 RETVAL
635 792
636

Diff Legend

– Removed lines
+ Added lines
< Changed lines
> Changed lines