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Comparing CV/CV.xs (file contents):
Revision 1.27 by root, Sun Aug 21 02:23:52 2005 UTC vs.
Revision 1.51 by root, Sat Dec 23 04:11:49 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>
14#include <gdk/gdkx.h>
11#include <gdk-pixbuf/gdk-pixbuf.h> 15#include <gdk-pixbuf/gdk-pixbuf.h>
12 16
13#include <gperl.h> 17#include <gperl.h>
14#include <gtk2perl.h> 18#include <gtk2perl.h>
15 19
20#include <assert.h>
21
22#if WEBP
23#include <webp/decode.h>
24#endif
25
26#include "perlmulticore.h"
27
16#define IW 80 /* MUST match Schnauer.pm! */ 28#define IW 80 /* MUST match Schnauzer.pm! */
17#define IH 60 /* MUST match Schnauer.pm! */ 29#define IH 60 /* MUST match Schnauzer.pm! */
18 30
19#define RAND (seed = (seed + 7141) * 54773 % 134456) 31#define RAND (seed = (seed + 7141) * 54773 % 134456)
20 32
21#define LINELENGTH 240 33#define LINELENGTH 240
22 34
23#define ELLIPSIS "\xe2\x80\xa6" 35#define ELLIPSIS "\xe2\x80\xa6"
36
37typedef char *octet_string;
38
39static magic_t magic_cookie[2]; /* !mime, mime */
24 40
25struct jpg_err_mgr 41struct jpg_err_mgr
26{ 42{
27 struct jpeg_error_mgr err; 43 struct jpeg_error_mgr err;
28 jmp_buf setjmp_buffer; 44 jmp_buf setjmp_buffer;
29}; 45};
30 46
31static void 47static void
32cv_error_exit (j_common_ptr cinfo) 48cv_error_exit (j_common_ptr cinfo)
33{ 49{
50 cinfo->err->output_message (cinfo);
34 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); 51 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
35} 52}
36 53
37static void 54static void
38cv_error_output (j_common_ptr cinfo) 55cv_error_output (j_common_ptr cinfo)
39{ 56{
57 char msg[JMSG_LENGTH_MAX];
58
59 cinfo->err->format_message (cinfo, msg);
60
61 fprintf (stderr, "JPEG decoding error: %s\n", msg);
40 return; 62 return;
41} 63}
42 64
43static void 65static void
44rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, 66rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
… …
65 87
66 *h &= 255; 88 *h &= 255;
67 } 89 }
68} 90}
69 91
92struct feature {
93 float v1, v2, v3; // mean, square, cube
94 int n;
95};
96
97static void
98feature_init (struct feature *f)
99{
100 f->v1 = 0.;
101 f->v2 = 0.;
102 f->v3 = 0.;
103 f->n = 0;
104}
105
106// didn't find an algorithm to neatly do mean, variance and skew in one pass.
107// elmex ist schuld.
108static void
109feature_update_pass_1 (struct feature *f, unsigned int v)
110{
111 f->v1 += v;
112 f->n += 1;
113}
114
115static void
116feature_finish_pass_1 (struct feature *f)
117{
118 if (f->n < 1)
119 return;
120
121 f->v1 /= f->n;
122}
123
124static void
125feature_update_pass_2 (struct feature *f, unsigned int v)
126{
127 float d = v - f->v1;
128
129 f->v2 += d * d;
130 f->v3 += d * d * d;
131}
132
133static void
134feature_finish_pass_2 (struct feature *f)
135{
136 if (f->n < 1)
137 return;
138
139 f->v2 /= f->n;
140 f->v3 /= f->n;
141
142 f->v1 /= 255.;
143 f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
144 f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
145}
146
70static guint32 a85_val; 147static guint32 a85_val;
71static guint a85_cnt; 148static guint a85_cnt;
72static guchar a85_buf[LINELENGTH], *a85_ptr; 149static guchar a85_buf[LINELENGTH], *a85_ptr;
73 150
74static void 151static void
… …
86 if (!--a85_cnt) 163 if (!--a85_cnt)
87 { 164 {
88 a85_cnt = 4; 165 a85_cnt = 4;
89 if (a85_val) 166 if (a85_val)
90 { 167 {
91 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; 168 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
92 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; 169 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
93 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; 170 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
94 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; 171 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
95 a85_ptr[0] = (a85_val ) + 33; 172 a85_ptr[0] = (a85_val ) + 33;
96 173
97 a85_ptr += 5; 174 a85_ptr += 5;
98 } 175 }
… …
126 203
127MODULE = Gtk2::CV PACKAGE = Gtk2::CV 204MODULE = Gtk2::CV PACKAGE = Gtk2::CV
128 205
129PROTOTYPES: ENABLE 206PROTOTYPES: ENABLE
130 207
208# missing function in perl. really :)
209int
210common_prefix_length (a, b)
211 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
212 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
213 CODE:
214 RETVAL = 0;
215
216 while (*a == *b && *a)
217 {
218 RETVAL += (*a & 0xc0) != 0x80;
219 a++, b++;
220 }
221
222 OUTPUT:
223 RETVAL
224
225const char *
226magic (SV *path_or_data)
227 ALIAS:
228 magic = 0
229 magic_mime = 1
230 magic_buffer = 2
231 magic_buffer_mime = 3
232 CODE:
233{
234 STRLEN len;
235 char *data = SvPVbyte (path_or_data, len);
236
237 perlinterp_release ();
238
239 if (!magic_cookie[0])
240 {
241 magic_cookie[0] = magic_open (MAGIC_SYMLINK);
242 magic_cookie[1] = magic_open (MAGIC_SYMLINK | MAGIC_MIME);
243 }
244
245 RETVAL = ix & 2
246 ? magic_buffer (magic_cookie[ix], data, len)
247 : magic_file (magic_cookie[ix], data);
248
249 perlinterp_acquire ();
250}
251 OUTPUT:
252 RETVAL
253
131# missing in Gtk2 perl module 254# missing/broken in Gtk2 perl module
255
256void
257gdk_window_clear_hints (GdkWindow *window)
258 CODE:
259 gdk_window_set_geometry_hints (window, 0, 0);
132 260
133gboolean 261gboolean
134gdk_net_wm_supports (GdkAtom property) 262gdk_net_wm_supports (GdkAtom property)
135 CODE: 263 CODE:
136#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) 264#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
… …
142 RETVAL 270 RETVAL
143 271
144GdkPixbuf_noinc * 272GdkPixbuf_noinc *
145dealpha_expose (GdkPixbuf *pb) 273dealpha_expose (GdkPixbuf *pb)
146 CODE: 274 CODE:
275 perlinterp_release ();
147{ 276{
148 int w = gdk_pixbuf_get_width (pb); 277 int w = gdk_pixbuf_get_width (pb);
149 int h = gdk_pixbuf_get_height (pb); 278 int h = gdk_pixbuf_get_height (pb);
150 int bpp = gdk_pixbuf_get_n_channels (pb); 279 int bpp = gdk_pixbuf_get_n_channels (pb);
151 int x, y, i; 280 int x, y, i;
… …
160 for (x = 0; x < w; x++) 289 for (x = 0; x < w; x++)
161 for (y = 0; y < h; y++) 290 for (y = 0; y < h; y++)
162 for (i = 0; i < 3; i++) 291 for (i = 0; i < 3; i++)
163 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i]; 292 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
164} 293}
294 perlinterp_acquire ();
165 OUTPUT: 295 OUTPUT:
166 RETVAL 296 RETVAL
167 297
168GdkPixbuf_noinc * 298GdkPixbuf_noinc *
169transpose (GdkPixbuf *pb) 299rotate (GdkPixbuf *pb, int angle)
170 CODE: 300 CODE:
171{ 301 perlinterp_release ();
172 int w = gdk_pixbuf_get_width (pb); 302 if (angle < 0)
173 int h = gdk_pixbuf_get_height (pb); 303 angle += 360;
174 int bpp = gdk_pixbuf_get_n_channels (pb); 304 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
175 int x, y, i; 305 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
176 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 306 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
177 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 307 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
178 308 : angle);
179 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); 309 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: 310 OUTPUT:
190 RETVAL 311 RETVAL
191 312
192GdkPixbuf_noinc * 313GdkPixbuf_noinc *
193flop (GdkPixbuf *pb) 314decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
194 CODE: 315 CODE:
195{ 316{
196 int w = gdk_pixbuf_get_width (pb); 317#if WEBP
197 int h = gdk_pixbuf_get_height (pb); 318 guchar *data;
198 int bpp = gdk_pixbuf_get_n_channels (pb); 319 STRLEN data_size;
320 int alpha;
321 WebPDecoderConfig config;
199 int x, y, i; 322 int inw, inh;
200 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
201 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
202 323
324 data = SvPVbyte (image_data, data_size);
325
326 perlinterp_release ();
327
328 RETVAL = 0;
329
330 if (!WebPInitDecoderConfig (&config))
331 goto err;
332
333 config.options.use_threads = 1;
334
335 if (WebPGetFeatures (data, data_size, &config.input) != VP8_STATUS_OK)
336 goto err;
337
338 inw = config.input.width;
339 inh = config.input.height;
340
341 if (thumbnail)
342 {
343 if (inw * ih > inh * iw)
344 ih = (iw * inh + inw - 1) / inw;
345 else
346 iw = (ih * inw + inh - 1) / inh;
347
348 config.options.bypass_filtering = 1;
349 config.options.no_fancy_upsampling = 1;
350
351 config.options.use_scaling = 1;
352 config.options.scaled_width = iw;
353 config.options.scaled_height = ih;
354 }
355 else
356 {
357 iw = inw;
358 ih = inh;
359 }
360
361 alpha = config.input.has_alpha;
362
203 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); 363 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!alpha, 8, iw, ih);
364 if (!RETVAL)
365 goto err;
204 366
205 dst = gdk_pixbuf_get_pixels (RETVAL); 367 config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
368 config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
206 dstr = gdk_pixbuf_get_rowstride (RETVAL); 369 config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
370 config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
371 config.output.is_external_memory = 1;
207 372
208 for (y = 0; y < h; y++) 373 if (WebPDecode (data, data_size, &config) != VP8_STATUS_OK)
209 for (x = 0; x < w; x++) 374 {
210 for (i = 0; i < bpp; i++) 375 g_object_unref (RETVAL);
211 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i]; 376 RETVAL = 0;
377 goto err;
378 }
379
380 err:
381 perlinterp_acquire ();
382#else
383 croak ("load_webp: webp not enabled at compile time");
384#endif
212} 385}
213 OUTPUT: 386 OUTPUT:
214 RETVAL 387 RETVAL
215 388
216GdkPixbuf_noinc * 389GdkPixbuf_noinc *
217load_jpeg (SV *path, int thumbnail=0) 390load_jpeg (SV *path, int thumbnail = 0, int iw = 0, int ih = 0)
218 CODE: 391 CODE:
219{ 392{
220 struct jpeg_decompress_struct cinfo; 393 struct jpeg_decompress_struct cinfo;
221 struct jpg_err_mgr jerr; 394 struct jpg_err_mgr jerr;
222 guchar *data; 395 guchar *data;
223 int rs; 396 int rs;
224 FILE *fp; 397 FILE *fp;
225 volatile GdkPixbuf *pb = 0; 398 volatile GdkPixbuf *pb = 0;
226 gchar *filename;
227 399
228 RETVAL = 0; 400 RETVAL = 0;
229 401
230 filename = g_filename_from_utf8 (SvPVutf8_nolen (path), -1, 0, 0, 0);
231 fp = fopen (filename, "rb"); 402 fp = fopen (SvPVbyte_nolen (path), "rb");
232 g_free (filename);
233 403
234 if (!fp) 404 if (!fp)
235 XSRETURN_UNDEF; 405 XSRETURN_UNDEF;
236 406
407 perlinterp_release ();
408
237 cinfo.err = jpeg_std_error (&jerr.err); 409 cinfo.err = jpeg_std_error (&jerr.err);
238 410
239 jerr.err.error_exit = cv_error_exit; 411 jerr.err.error_exit = cv_error_exit;
240 jerr.err.output_message = cv_error_output; 412 jerr.err.output_message = cv_error_output;
241 413
… …
245 jpeg_destroy_decompress (&cinfo); 417 jpeg_destroy_decompress (&cinfo);
246 418
247 if (pb) 419 if (pb)
248 g_object_unref ((gpointer)pb); 420 g_object_unref ((gpointer)pb);
249 421
422 perlinterp_acquire ();
250 XSRETURN_UNDEF; 423 XSRETURN_UNDEF;
251 } 424 }
252 425
253 jpeg_create_decompress (&cinfo); 426 jpeg_create_decompress (&cinfo);
254 427
… …
270 { 443 {
271 cinfo.dct_method = JDCT_FASTEST; 444 cinfo.dct_method = JDCT_FASTEST;
272 cinfo.do_fancy_upsampling = FALSE; 445 cinfo.do_fancy_upsampling = FALSE;
273 446
274 while (cinfo.scale_denom < 8 447 while (cinfo.scale_denom < 8
275 && cinfo.output_width >= IW*4 448 && cinfo.output_width >= iw*4
276 && cinfo.output_height >= IH*4) 449 && cinfo.output_height >= ih*4)
277 { 450 {
278 cinfo.scale_denom <<= 1; 451 cinfo.scale_denom <<= 1;
279 jpeg_calc_output_dimensions (&cinfo); 452 jpeg_calc_output_dimensions (&cinfo);
280 } 453 }
281 } 454 }
282 455
456 if (cinfo.output_components != 3)
457 longjmp (jerr.setjmp_buffer, 3);
458
459 if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK)
460 {
461 cinfo.out_color_space = JCS_CMYK;
462 cinfo.output_components = 4;
463 }
464
283 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height); 465 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
284 if (!RETVAL) 466 if (!RETVAL)
285 longjmp (jerr.setjmp_buffer, 2); 467 longjmp (jerr.setjmp_buffer, 2);
286 468
287 data = gdk_pixbuf_get_pixels (RETVAL); 469 data = gdk_pixbuf_get_pixels (RETVAL);
288 rs = gdk_pixbuf_get_rowstride (RETVAL); 470 rs = gdk_pixbuf_get_rowstride (RETVAL);
289
290 if (cinfo.output_components != 3)
291 longjmp (jerr.setjmp_buffer, 3);
292 471
293 jpeg_start_decompress (&cinfo); 472 jpeg_start_decompress (&cinfo);
294 473
295 while (cinfo.output_scanline < cinfo.output_height) 474 while (cinfo.output_scanline < cinfo.output_height)
296 { 475 {
… …
303 rp [3] = (guchar *)rp [2] + rs; 482 rp [3] = (guchar *)rp [2] + rs;
304 483
305 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); 484 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
306 } 485 }
307 486
487 if (cinfo.out_color_space == JCS_CMYK)
488 {
489 guchar *end = data + cinfo.output_height * rs;
490
491 while (data < end)
492 {
493 U32 c = data [0];
494 U32 m = data [1];
495 U32 y = data [2];
496 U32 k = data [3];
497
498 if (0)
499 if (cinfo.Adobe_transform == 2)
500 {
501 c ^= 0xff;
502 m ^= 0xff;
503 y ^= 0xff;
504 k ^= 0xff;
505 }
506
507 data [0] = (c * k + 0x80) / 0xff;
508 data [1] = (m * k + 0x80) / 0xff;
509 data [2] = (y * k + 0x80) / 0xff;
510 data [3] = 0xff;
511
512 data += 4;
513 }
514 }
515
308 jpeg_finish_decompress (&cinfo); 516 jpeg_finish_decompress (&cinfo);
309 fclose (fp); 517 fclose (fp);
310 jpeg_destroy_decompress (&cinfo); 518 jpeg_destroy_decompress (&cinfo);
519 perlinterp_acquire ();
311} 520}
312 OUTPUT: 521 OUTPUT:
313 RETVAL 522 RETVAL
314 523
524void
525compare (GdkPixbuf *a, GdkPixbuf *b)
526 PPCODE:
527 perlinterp_release ();
528{
529 int w = gdk_pixbuf_get_width (a);
530 int h = gdk_pixbuf_get_height (a);
531
532 int sa = gdk_pixbuf_get_rowstride (a);
533 int sb = gdk_pixbuf_get_rowstride (b);
534
535 guchar *pa = gdk_pixbuf_get_pixels (a);
536 guchar *pb = gdk_pixbuf_get_pixels (b);
537
538 int x, y;
539
540 assert (w == gdk_pixbuf_get_width (b));
541 assert (h == gdk_pixbuf_get_height (b));
542
543 assert (gdk_pixbuf_get_n_channels (a) == 3);
544 assert (gdk_pixbuf_get_n_channels (b) == 3);
545
546 double diff = 0.;
547 int peak = 0;
548
549 if (w && h)
550 for (y = 0; y < h; y++)
551 {
552 guchar *pa_ = pa + y * sa;
553 guchar *pb_ = pb + y * sb;
554
555 for (x = 0; x < w; x++)
556 {
557 int d;
558
559 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
560 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
561 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
562 }
563 }
564
565 perlinterp_acquire ();
566
567 EXTEND (SP, 2);
568 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
569 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
570}
571
315############################################################################# 572#############################################################################
316 573
317MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 574MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
575
576# currently only works for filenames (octet strings)
318 577
319SV * 578SV *
320foldcase (SV *pathsv) 579foldcase (SV *pathsv)
321 PROTOTYPE: $ 580 PROTOTYPE: $
322 CODE: 581 CODE:
323{ 582{
324 STRLEN plen; 583 STRLEN plen;
325 U8 *path = (U8 *)SvPVutf8 (pathsv, plen); 584 U8 *path = (U8 *)SvPV (pathsv, plen);
326 U8 *pend = path + plen; 585 U8 *pend = path + plen;
327 U8 dst [plen * 6 * 3], *dstp = dst; 586 U8 dst [plen * 6 * 3], *dstp = dst;
328 587
329 while (path < pend) 588 while (path < pend)
330 { 589 {
331 U8 ch = *path; 590 U8 ch = *path;
332 591
333 if (ch >= 'a' && ch <= 'z') 592 if (ch >= 'a' && ch <= 'z')
334 *dstp++ = *path++; 593 *dstp++ = *path++;
594 else if (ch >= 'A' && ch <= 'Z')
595 *dstp++ = *path++ + ('a' - 'A');
335 else if (ch >= '0' && ch <= '9') 596 else if (ch >= '0' && ch <= '9')
336 { 597 {
337 STRLEN el, nl = 0; 598 STRLEN el, nl = 0;
338 while (*path >= '0' && *path <= '9' && path < pend) 599 while (*path >= '0' && *path <= '9' && path < pend)
339 path++, nl++; 600 path++, nl++;
… …
342 *dstp++ = '0'; 603 *dstp++ = '0';
343 604
344 memcpy (dstp, path - nl, nl); 605 memcpy (dstp, path - nl, nl);
345 dstp += nl; 606 dstp += nl;
346 } 607 }
608 else
609 *dstp++ = *path++;
610#if 0
347 else 611 else
348 { 612 {
349 STRLEN cl; 613 STRLEN cl;
350 to_utf8_fold (path, dstp, &cl); 614 to_utf8_fold (path, dstp, &cl);
351 dstp += cl; 615 dstp += cl;
352 path += is_utf8_char (path); 616 path += is_utf8_char (path);
353 } 617 }
618#endif
354 } 619 }
355 620
356 RETVAL = newSVpvn ((const char *)dst, dstp - dst); 621 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
357} 622}
358 OUTPUT: 623 OUTPUT:
… …
383 } 648 }
384} 649}
385 OUTPUT: 650 OUTPUT:
386 RETVAL 651 RETVAL
387 652
653#############################################################################
654
655MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
656
657void
658dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
659 CODE:
660{
661 int w = gdk_pixbuf_get_width (pb);
662 int h = gdk_pixbuf_get_height (pb);
663 int x, y, i;
664 guchar *dst;
665 int bpp = gdk_pixbuf_get_n_channels (pb);
666 guchar *src = gdk_pixbuf_get_pixels (pb);
667 int sstr = gdk_pixbuf_get_rowstride (pb);
668
669 a85_init ();
670
671 for (y = 0; y < h; y++)
672 for (x = 0; x < w; x++)
673 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
674 a85_push (fp, src [x * bpp + y * sstr + i]);
675
676 a85_finish (fp);
677}
678
679void
680dump_binary (PerlIO *fp, GdkPixbuf *pb)
681 CODE:
682{
683 int w = gdk_pixbuf_get_width (pb);
684 int h = gdk_pixbuf_get_height (pb);
685 int x, y, i;
686 guchar *dst;
687 int bpp = gdk_pixbuf_get_n_channels (pb);
688 guchar *src = gdk_pixbuf_get_pixels (pb);
689 int sstr = gdk_pixbuf_get_rowstride (pb);
690
691 for (y = 0; y < h; y++)
692 for (x = 0; x < w; x++)
693 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
694 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
695}
696
697#############################################################################
698
699MODULE = Gtk2::CV PACKAGE = Gtk2::CV
700
388SV * 701SV *
389pb_to_p7 (GdkPixbuf *pb) 702pb_to_hv84 (GdkPixbuf *pb)
390 CODE: 703 CODE:
391{ 704{
392 int w = gdk_pixbuf_get_width (pb); 705 int w = gdk_pixbuf_get_width (pb);
393 int h = gdk_pixbuf_get_height (pb); 706 int h = gdk_pixbuf_get_height (pb);
394 int x, y; 707 int x, y;
395 guchar *dst; 708 guchar *dst;
396 int bpp = gdk_pixbuf_get_n_channels (pb); 709 int bpp = gdk_pixbuf_get_n_channels (pb);
397 guchar *src = gdk_pixbuf_get_pixels (pb); 710 guchar *src = gdk_pixbuf_get_pixels (pb);
398 int sstr = gdk_pixbuf_get_rowstride (pb); 711 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);
505 712
506 RETVAL = newSV (6 * 8 * 12 / 8); 713 RETVAL = newSV (6 * 8 * 12 / 8);
507 SvPOK_only (RETVAL); 714 SvPOK_only (RETVAL);
508 SvCUR_set (RETVAL, 6 * 8 * 12 / 8); 715 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
509 716
… …
578############################################################################# 785#############################################################################
579 786
580MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster 787MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
581 788
582SV * 789SV *
583make_histograms (SV *ar) 790extract_features (SV *ar)
584 CODE: 791 CODE:
585{ 792{
586 int i; 793 int i;
587 AV *av, *result; 794 AV *av, *result;
588 795
589 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) 796 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
590 croak ("Not an array ref as first argument to make_histogram"); 797 croak ("Not an array ref as first argument to extract_features");
591 798
592 av = (AV *) SvRV (ar); 799 av = (AV *) SvRV (ar);
593 result = newAV (); 800 result = newAV ();
594 801
595 for (i = 0; i <= av_len (av); ++i) 802 for (i = 0; i <= av_len (av); ++i)
596 { 803 {
597 const int HISTSIZE = 64;
598
599 int j;
600 SV *sv = *av_fetch (av, i, 1); 804 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); 805 SV *histsv = newSV (9 * sizeof (float) + 1);
806
608 SvPOK_on (histsv); 807 SvPOK_on (histsv);
609 SvCUR_set (histsv, HISTSIZE * sizeof (float)); 808 SvCUR_set (histsv, 9 * sizeof (float));
610 hist = (float *)SvPVX (histsv); 809 float *hist = (float *)SvPVX (histsv);
611 810
612 Zero (tmphist, sizeof (tmphist), char); 811 struct feature f_h, f_s, f_v;
812 feature_init (&f_h);
813 feature_init (&f_s);
814 feature_init (&f_v);
613 815
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 }
624 816 {
625 for (j = 0; j < HISTSIZE; ++j) 817 STRLEN len;
626 hist[j] = (float)tmphist[j] / (len + 1e-30); 818 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
819 while (len >= 3)
820 {
821 unsigned int r, g, b, h, s, v;
822 r = *buf++; g = *buf++; b = *buf++;
823 rgb_to_hsv (r, g, b, &h, &s, &v);
824
825 feature_update_pass_1 (&f_h, h);
826 feature_update_pass_1 (&f_s, s);
827 feature_update_pass_1 (&f_v, v);
828
829 len -= 3;
830 }
831
832 feature_finish_pass_1 (&f_h);
833 feature_finish_pass_1 (&f_s);
834 feature_finish_pass_1 (&f_v);
835 }
836
837 {
838 STRLEN len;
839 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
840 while (len >= 3)
841 {
842 unsigned int r, g, b, h, s, v;
843 r = *buf++; g = *buf++; b = *buf++;
844 rgb_to_hsv (r, g, b, &h, &s, &v);
845
846 feature_update_pass_2 (&f_h, h);
847 feature_update_pass_2 (&f_s, s);
848 feature_update_pass_2 (&f_v, v);
849
850 len -= 3;
851 }
852
853 feature_finish_pass_2 (&f_h);
854 feature_finish_pass_2 (&f_s);
855 feature_finish_pass_2 (&f_v);
856 }
857
858 hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
859 hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
860 hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
627 861
628 av_push (result, histsv); 862 av_push (result, histsv);
629 } 863 }
630 864
631 RETVAL = newRV_noinc ((SV *)result); 865 RETVAL = newRV_noinc ((SV *)result);
632} 866}
633 OUTPUT: 867 OUTPUT:
634 RETVAL 868 RETVAL
635 869
636

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