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Comparing CV/CV.xs (file contents):
Revision 1.32 by root, Wed Feb 15 08:36:55 2006 UTC vs.
Revision 1.57 by root, Mon Jul 30 22:55:46 2018 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>
7 8
8#include <magic.h> 9#include <magic.h>
9 10
10#include <jpeglib.h> 11#include <jpeglib.h>
12#include <jerror.h>
13
11#include <glib.h> 14#include <glib.h>
12#include <gtk/gtk.h> 15#include <gtk/gtk.h>
16#include <gdk/gdkx.h>
13#include <gdk-pixbuf/gdk-pixbuf.h> 17#include <gdk-pixbuf/gdk-pixbuf.h>
14 18
15#include <gperl.h> 19#include <gperl.h>
16#include <gtk2perl.h> 20#include <gtk2perl.h>
17 21
22#include <assert.h>
23
24#if WEBP
25#include <webp/demux.h>
26#include <webp/decode.h>
27#endif
28
29#include "perlmulticore.h"
30
18#define IW 80 /* MUST match Schnauer.pm! */ 31#define IW 80 /* MUST match Schnauzer.pm! */
19#define IH 60 /* MUST match Schnauer.pm! */ 32#define IH 60 /* MUST match Schnauzer.pm! */
20 33
21#define RAND (seed = (seed + 7141) * 54773 % 134456) 34#define RAND (seed = (seed + 7141) * 54773 % 134456)
22 35
23#define LINELENGTH 240 36#define LINELENGTH 240
24 37
25#define ELLIPSIS "\xe2\x80\xa6" 38#define ELLIPSIS "\xe2\x80\xa6"
39
40typedef char *octet_string;
41
42static magic_t magic_cookie[2]; /* !mime, mime */
26 43
27struct jpg_err_mgr 44struct jpg_err_mgr
28{ 45{
29 struct jpeg_error_mgr err; 46 struct jpeg_error_mgr err;
30 jmp_buf setjmp_buffer; 47 jmp_buf setjmp_buffer;
31}; 48};
32 49
33static void 50static void
34cv_error_exit (j_common_ptr cinfo) 51cv_error_exit (j_common_ptr cinfo)
35{ 52{
53 cinfo->err->output_message (cinfo);
36 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); 54 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
37} 55}
38 56
39static void 57static void
40cv_error_output (j_common_ptr cinfo) 58cv_error_output (j_common_ptr cinfo)
41{ 59{
60 char msg[JMSG_LENGTH_MAX];
61
62 cinfo->err->format_message (cinfo, msg);
63
64 fprintf (stderr, "JPEG decoding error: %s\n", msg);
42 return; 65 return;
43} 66}
44 67
45static void 68static void
46rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, 69rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
… …
67 90
68 *h &= 255; 91 *h &= 255;
69 } 92 }
70} 93}
71 94
95struct feature {
96 float v1, v2, v3; // mean, square, cube
97 int n;
98};
99
100static void
101feature_init (struct feature *f)
102{
103 f->v1 = 0.;
104 f->v2 = 0.;
105 f->v3 = 0.;
106 f->n = 0;
107}
108
109// didn't find an algorithm to neatly do mean, variance and skew in one pass.
110// elmex ist schuld.
111static void
112feature_update_pass_1 (struct feature *f, unsigned int v)
113{
114 f->v1 += v;
115 f->n += 1;
116}
117
118static void
119feature_finish_pass_1 (struct feature *f)
120{
121 if (f->n < 1)
122 return;
123
124 f->v1 /= f->n;
125}
126
127static void
128feature_update_pass_2 (struct feature *f, unsigned int v)
129{
130 float d = v - f->v1;
131
132 f->v2 += d * d;
133 f->v3 += d * d * d;
134}
135
136static void
137feature_finish_pass_2 (struct feature *f)
138{
139 if (f->n < 1)
140 return;
141
142 f->v2 /= f->n;
143 f->v3 /= f->n;
144
145 f->v1 /= 255.;
146 f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
147 f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
148}
149
72static guint32 a85_val; 150static guint32 a85_val;
73static guint a85_cnt; 151static guint a85_cnt;
74static guchar a85_buf[LINELENGTH], *a85_ptr; 152static guchar a85_buf[LINELENGTH], *a85_ptr;
75 153
76static void 154static void
… …
88 if (!--a85_cnt) 166 if (!--a85_cnt)
89 { 167 {
90 a85_cnt = 4; 168 a85_cnt = 4;
91 if (a85_val) 169 if (a85_val)
92 { 170 {
93 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; 171 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
94 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; 172 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
95 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; 173 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
96 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; 174 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
97 a85_ptr[0] = (a85_val ) + 33; 175 a85_ptr[0] = (a85_val ) + 33;
98 176
99 a85_ptr += 5; 177 a85_ptr += 5;
100 } 178 }
… …
123 201
124 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); 202 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
125} 203}
126 204
127///////////////////////////////////////////////////////////////////////////// 205/////////////////////////////////////////////////////////////////////////////
206// memory source for libjpeg
207
208static void cv_ms_init (j_decompress_ptr cinfo)
209{
210}
211
212static void cv_ms_term (j_decompress_ptr cinfo)
213{
214}
215
216static boolean cv_ms_fill (j_decompress_ptr cinfo)
217{
218 // unexpected EOF, warn and generate fake EOI marker
219
220 WARNMS (cinfo, JWRN_JPEG_EOF);
221
222 struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src;
223
224 static const JOCTET eoi[] = { 0xFF, JPEG_EOI };
225
226 src->next_input_byte = eoi;
227 src->bytes_in_buffer = sizeof (eoi);
228
229 return TRUE;
230}
231
232static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes)
233{
234 struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src;
235
236 src->next_input_byte += num_bytes;
237 src->bytes_in_buffer -= num_bytes;
238}
239
240static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen)
241{
242 struct jpeg_source_mgr *src;
243
244 if (!cinfo->src)
245 cinfo->src = (struct jpeg_source_mgr *)
246 (*cinfo->mem->alloc_small) (
247 (j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)
248 );
249
250 src = (struct jpeg_source_mgr *)cinfo->src;
251 src->init_source = cv_ms_init;
252 src->fill_input_buffer = cv_ms_fill;
253 src->skip_input_data = cv_ms_skip;
254 src->resync_to_restart = jpeg_resync_to_restart;
255 src->term_source = cv_ms_term;
256 src->next_input_byte = (JOCTET *)buf;
257 src->bytes_in_buffer = buflen;
258}
259
260/////////////////////////////////////////////////////////////////////////////
128 261
129MODULE = Gtk2::CV PACKAGE = Gtk2::CV 262MODULE = Gtk2::CV PACKAGE = Gtk2::CV
130 263
131PROTOTYPES: ENABLE 264PROTOTYPES: ENABLE
132 265
266# calculate the common prefix length of two strings
133# missing function in perl. really :) 267# missing function in perl. really :)
134int 268int
135common_prefix_length (a, b) 269common_prefix_length (a, b)
136 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg); 270 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
137 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg); 271 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
… …
146 280
147 OUTPUT: 281 OUTPUT:
148 RETVAL 282 RETVAL
149 283
150const char * 284const char *
151magic (const char *path) 285magic (SV *path_or_data)
286 ALIAS:
287 magic = 0
288 magic_mime = 1
289 magic_buffer = 2
290 magic_buffer_mime = 3
152 CODE: 291 CODE:
153{ 292{
154 static magic_t cookie; 293 STRLEN len;
294 char *data = SvPVbyte (path_or_data, len);
155 295
156 if (!cookie) 296 if (!magic_cookie[0])
297 {
298 magic_cookie[0] = magic_open (MAGIC_SYMLINK);
299 magic_cookie[1] = magic_open (MAGIC_SYMLINK | MAGIC_MIME_TYPE);
300 magic_load (magic_cookie[0], 0);
301 magic_load (magic_cookie[1], 0);
157 { 302 }
158 cookie = magic_open (MAGIC_NONE);
159 303
160 if (cookie) 304 perlinterp_release ();
161 magic_load (cookie, 0);
162 else
163 XSRETURN_UNDEF;
164 }
165 305
166 RETVAL = magic_file (cookie, path); 306 RETVAL = ix & 2
307 ? magic_buffer (magic_cookie[ix & 1], data, len)
308 : magic_file (magic_cookie[ix & 1], data);
309
310 perlinterp_acquire ();
167} 311}
168 OUTPUT: 312 OUTPUT:
169 RETVAL 313 RETVAL
170 314
171const char *
172magic_mime (const char *path)
173 CODE:
174{
175 static magic_t cookie;
176
177 if (!cookie)
178 {
179 cookie = magic_open (MAGIC_MIME);
180
181 if (cookie)
182 magic_load (cookie, 0);
183 else
184 XSRETURN_UNDEF;
185 }
186
187 RETVAL = magic_file (cookie, path);
188}
189 OUTPUT:
190 RETVAL
191
192# missing in Gtk2 perl module 315# missing/broken in Gtk2 perl module
316
317void
318gdk_window_clear_hints (GdkWindow *window)
319 CODE:
320 gdk_window_set_geometry_hints (window, 0, 0);
193 321
194gboolean 322gboolean
195gdk_net_wm_supports (GdkAtom property) 323gdk_net_wm_supports (GdkAtom property)
196 CODE: 324 CODE:
197#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) 325#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
… …
203 RETVAL 331 RETVAL
204 332
205GdkPixbuf_noinc * 333GdkPixbuf_noinc *
206dealpha_expose (GdkPixbuf *pb) 334dealpha_expose (GdkPixbuf *pb)
207 CODE: 335 CODE:
336 perlinterp_release ();
208{ 337{
209 int w = gdk_pixbuf_get_width (pb); 338 int w = gdk_pixbuf_get_width (pb);
210 int h = gdk_pixbuf_get_height (pb); 339 int h = gdk_pixbuf_get_height (pb);
211 int bpp = gdk_pixbuf_get_n_channels (pb); 340 int bpp = gdk_pixbuf_get_n_channels (pb);
212 int x, y, i; 341 int x, y, i;
… …
221 for (x = 0; x < w; x++) 350 for (x = 0; x < w; x++)
222 for (y = 0; y < h; y++) 351 for (y = 0; y < h; y++)
223 for (i = 0; i < 3; i++) 352 for (i = 0; i < 3; i++)
224 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i]; 353 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
225} 354}
355 perlinterp_acquire ();
226 OUTPUT: 356 OUTPUT:
227 RETVAL 357 RETVAL
228 358
229GdkPixbuf_noinc * 359GdkPixbuf_noinc *
230rotate (GdkPixbuf *pb, int angle) 360rotate (GdkPixbuf *pb, int angle)
231 CODE: 361 CODE:
362 perlinterp_release ();
363 if (angle < 0)
364 angle += 360;
232 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE 365 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
233 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE 366 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
234 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN 367 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
235 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE 368 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
236 : angle); 369 : angle);
370 perlinterp_acquire ();
237 OUTPUT: 371 OUTPUT:
238 RETVAL 372 RETVAL
239 373
374const char *
375filetype (SV *image_data)
376 CODE:
377{
378 STRLEN data_len;
379 U8 *data = SvPVbyte (image_data, data_len);
380
381 if (data_len >= 20
382 && data[0] == 0xff
383 && data[1] == 0xd8
384 && data[2] == 0xff)
385 RETVAL = "jpg";
386 else if (data_len >= 12
387 && data[ 0] == (U8)'R'
388 && data[ 1] == (U8)'I'
389 && data[ 2] == (U8)'F'
390 && data[ 3] == (U8)'F'
391 && data[ 8] == (U8)'W'
392 && data[ 9] == (U8)'E'
393 && data[10] == (U8)'B'
394 && data[11] == (U8)'P')
395 RETVAL = "webp";
396 else if (data_len >= 16
397 && data[ 0] == 0x89
398 && data[ 1] == (U8)'P'
399 && data[ 2] == (U8)'N'
400 && data[ 3] == (U8)'G'
401 && data[ 4] == 0x0d
402 && data[ 5] == 0x0a
403 && data[ 6] == 0x1a
404 && data[ 7] == 0x0a)
405 RETVAL = "png";
406 else
407 RETVAL = "other";
408}
409 OUTPUT:
410 RETVAL
411
240GdkPixbuf_noinc * 412GdkPixbuf_noinc *
241load_jpeg (SV *path, int thumbnail=0) 413decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
414 CODE:
415{
416#if WEBP
417 STRLEN data_size;
418 int alpha;
419 WebPData data;
420 WebPDemuxer *demux;
421 WebPIterator iter;
422 WebPDecoderConfig config;
423 int inw, inh;
424
425 data.bytes = (uint8_t *)SvPVbyte (image_data, data_size);
426 data.size = data_size;
427
428 perlinterp_release ();
429
430 RETVAL = 0;
431
432 if (!(demux = WebPDemux (&data)))
433 goto err_demux;
434
435 if (!WebPDemuxGetFrame (demux, 1, &iter))
436 goto err_iter;
437
438 if (!WebPInitDecoderConfig (&config))
439 goto err_iter;
440
441 config.options.use_threads = 1;
442
443 if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK)
444 goto err_iter;
445
446 inw = config.input.width;
447 inh = config.input.height;
448
449 if (thumbnail)
450 {
451 if (inw * ih > inh * iw)
452 ih = (iw * inh + inw - 1) / inw;
453 else
454 iw = (ih * inw + inh - 1) / inh;
455
456 config.options.bypass_filtering = 1;
457 config.options.no_fancy_upsampling = 1;
458
459 config.options.use_scaling = 1;
460 config.options.scaled_width = iw;
461 config.options.scaled_height = ih;
462 }
463 else
464 {
465 iw = inw;
466 ih = inh;
467 }
468
469 alpha = !!config.input.has_alpha;
470
471 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih);
472 if (!RETVAL)
473 goto err_iter;
474
475 config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
476 config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
477 config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
478 config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
479 config.output.is_external_memory = 1;
480
481 if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK)
482 {
483 g_object_unref (RETVAL);
484 RETVAL = 0;
485 goto err_iter;
486 }
487
488 err_iter:
489 WebPDemuxReleaseIterator (&iter);
490 err_demux:
491 WebPDemuxDelete (demux);
492
493 perlinterp_acquire ();
494#else
495 croak ("load_webp: webp not enabled at compile time");
496#endif
497}
498 OUTPUT:
499 RETVAL
500
501GdkPixbuf_noinc *
502decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
242 CODE: 503 CODE:
243{ 504{
244 struct jpeg_decompress_struct cinfo; 505 struct jpeg_decompress_struct cinfo;
245 struct jpg_err_mgr jerr; 506 struct jpg_err_mgr jerr;
246 guchar *data;
247 int rs; 507 int rs;
248 FILE *fp;
249 volatile GdkPixbuf *pb = 0; 508 volatile GdkPixbuf *pb = 0;
509 STRLEN data_len;
510 guchar *data = SvPVbyte (image_data, data_len);
250 511
251 RETVAL = 0; 512 RETVAL = 0;
252 513
253 fp = fopen (SvPVbyte_nolen (path), "rb"); 514 perlinterp_release ();
254
255 if (!fp)
256 XSRETURN_UNDEF;
257 515
258 cinfo.err = jpeg_std_error (&jerr.err); 516 cinfo.err = jpeg_std_error (&jerr.err);
259 517
260 jerr.err.error_exit = cv_error_exit; 518 jerr.err.error_exit = cv_error_exit;
261 jerr.err.output_message = cv_error_output; 519 jerr.err.output_message = cv_error_output;
262 520
263 if ((rs = setjmp (jerr.setjmp_buffer))) 521 if ((rs = setjmp (jerr.setjmp_buffer)))
264 { 522 {
265 fclose (fp);
266 jpeg_destroy_decompress (&cinfo); 523 jpeg_destroy_decompress (&cinfo);
267 524
268 if (pb) 525 if (pb)
269 g_object_unref ((gpointer)pb); 526 g_object_unref ((gpointer)pb);
270 527
528 perlinterp_acquire ();
271 XSRETURN_UNDEF; 529 XSRETURN_UNDEF;
272 } 530 }
273 531
532 if (!data_len)
533 longjmp (jerr.setjmp_buffer, 4);
534
274 jpeg_create_decompress (&cinfo); 535 jpeg_create_decompress (&cinfo);
536 cv_jpeg_mem_src (&cinfo, data, data_len);
275 537
276 jpeg_stdio_src (&cinfo, fp);
277 jpeg_read_header (&cinfo, TRUE); 538 jpeg_read_header (&cinfo, TRUE);
278 539
279 cinfo.dct_method = JDCT_DEFAULT; 540 cinfo.dct_method = JDCT_DEFAULT;
280 cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */ 541 cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
281 cinfo.do_block_smoothing = FALSE; 542 cinfo.do_block_smoothing = FALSE;
… …
291 { 552 {
292 cinfo.dct_method = JDCT_FASTEST; 553 cinfo.dct_method = JDCT_FASTEST;
293 cinfo.do_fancy_upsampling = FALSE; 554 cinfo.do_fancy_upsampling = FALSE;
294 555
295 while (cinfo.scale_denom < 8 556 while (cinfo.scale_denom < 8
296 && cinfo.output_width >= IW*4 557 && cinfo.output_width >= iw*4
297 && cinfo.output_height >= IH*4) 558 && cinfo.output_height >= ih*4)
298 { 559 {
299 cinfo.scale_denom <<= 1; 560 cinfo.scale_denom <<= 1;
300 jpeg_calc_output_dimensions (&cinfo); 561 jpeg_calc_output_dimensions (&cinfo);
301 } 562 }
302 } 563 }
303 564
565 if (cinfo.output_components != 3)
566 longjmp (jerr.setjmp_buffer, 3);
567
568 if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK)
569 {
570 cinfo.out_color_space = JCS_CMYK;
571 cinfo.output_components = 4;
572 }
573
304 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height); 574 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
305 if (!RETVAL) 575 if (!RETVAL)
306 longjmp (jerr.setjmp_buffer, 2); 576 longjmp (jerr.setjmp_buffer, 2);
307 577
308 data = gdk_pixbuf_get_pixels (RETVAL); 578 data = gdk_pixbuf_get_pixels (RETVAL);
309 rs = gdk_pixbuf_get_rowstride (RETVAL); 579 rs = gdk_pixbuf_get_rowstride (RETVAL);
310
311 if (cinfo.output_components != 3)
312 longjmp (jerr.setjmp_buffer, 3);
313 580
314 jpeg_start_decompress (&cinfo); 581 jpeg_start_decompress (&cinfo);
315 582
316 while (cinfo.output_scanline < cinfo.output_height) 583 while (cinfo.output_scanline < cinfo.output_height)
317 { 584 {
… …
324 rp [3] = (guchar *)rp [2] + rs; 591 rp [3] = (guchar *)rp [2] + rs;
325 592
326 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); 593 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
327 } 594 }
328 595
596 if (cinfo.out_color_space == JCS_CMYK)
597 {
598 guchar *end = data + cinfo.output_height * rs;
599
600 while (data < end)
601 {
602 U32 c = data [0];
603 U32 m = data [1];
604 U32 y = data [2];
605 U32 k = data [3];
606
607 if (0)
608 if (cinfo.Adobe_transform == 2)
609 {
610 c ^= 0xff;
611 m ^= 0xff;
612 y ^= 0xff;
613 k ^= 0xff;
614 }
615
616 data [0] = (c * k + 0x80) / 0xff;
617 data [1] = (m * k + 0x80) / 0xff;
618 data [2] = (y * k + 0x80) / 0xff;
619 data [3] = 0xff;
620
621 data += 4;
622 }
623 }
624
329 jpeg_finish_decompress (&cinfo); 625 jpeg_finish_decompress (&cinfo);
330 fclose (fp);
331 jpeg_destroy_decompress (&cinfo); 626 jpeg_destroy_decompress (&cinfo);
627 perlinterp_acquire ();
332} 628}
333 OUTPUT: 629 OUTPUT:
334 RETVAL 630 RETVAL
335 631
632void
633compare (GdkPixbuf *a, GdkPixbuf *b)
634 PPCODE:
635 perlinterp_release ();
636{
637 int w = gdk_pixbuf_get_width (a);
638 int h = gdk_pixbuf_get_height (a);
639
640 int sa = gdk_pixbuf_get_rowstride (a);
641 int sb = gdk_pixbuf_get_rowstride (b);
642
643 guchar *pa = gdk_pixbuf_get_pixels (a);
644 guchar *pb = gdk_pixbuf_get_pixels (b);
645
646 int x, y;
647
648 assert (w == gdk_pixbuf_get_width (b));
649 assert (h == gdk_pixbuf_get_height (b));
650
651 assert (gdk_pixbuf_get_n_channels (a) == 3);
652 assert (gdk_pixbuf_get_n_channels (b) == 3);
653
654 double diff = 0.;
655 int peak = 0;
656
657 if (w && h)
658 for (y = 0; y < h; y++)
659 {
660 guchar *pa_ = pa + y * sa;
661 guchar *pb_ = pb + y * sb;
662
663 for (x = 0; x < w; x++)
664 {
665 int d;
666
667 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
668 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
669 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
670 }
671 }
672
673 perlinterp_acquire ();
674
675 EXTEND (SP, 2);
676 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
677 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
678}
679
336############################################################################# 680#############################################################################
337 681
338MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 682MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
683
684# currently only works for filenames (octet strings)
339 685
340SV * 686SV *
341foldcase (SV *pathsv) 687foldcase (SV *pathsv)
342 PROTOTYPE: $ 688 PROTOTYPE: $
343 CODE: 689 CODE:
344{ 690{
345 STRLEN plen; 691 STRLEN plen;
346 U8 *path = (U8 *)SvPVutf8 (pathsv, plen); 692 U8 *path = (U8 *)SvPV (pathsv, plen);
347 U8 *pend = path + plen; 693 U8 *pend = path + plen;
348 U8 dst [plen * 6 * 3], *dstp = dst; 694 U8 dst [plen * 6 * 3], *dstp = dst;
349 695
350 while (path < pend) 696 while (path < pend)
351 { 697 {
352 U8 ch = *path; 698 U8 ch = *path;
353 699
354 if (ch >= 'a' && ch <= 'z') 700 if (ch >= 'a' && ch <= 'z')
355 *dstp++ = *path++; 701 *dstp++ = *path++;
702 else if (ch >= 'A' && ch <= 'Z')
703 *dstp++ = *path++ + ('a' - 'A');
356 else if (ch >= '0' && ch <= '9') 704 else if (ch >= '0' && ch <= '9')
357 { 705 {
358 STRLEN el, nl = 0; 706 STRLEN el, nl = 0;
359 while (*path >= '0' && *path <= '9' && path < pend) 707 while (*path >= '0' && *path <= '9' && path < pend)
360 path++, nl++; 708 path++, nl++;
… …
363 *dstp++ = '0'; 711 *dstp++ = '0';
364 712
365 memcpy (dstp, path - nl, nl); 713 memcpy (dstp, path - nl, nl);
366 dstp += nl; 714 dstp += nl;
367 } 715 }
716 else
717 *dstp++ = *path++;
718#if 0
368 else 719 else
369 { 720 {
370 STRLEN cl; 721 STRLEN cl;
371 to_utf8_fold (path, dstp, &cl); 722 to_utf8_fold (path, dstp, &cl);
372 dstp += cl; 723 dstp += cl;
373 path += is_utf8_char (path); 724 path += is_utf8_char (path);
374 } 725 }
726#endif
375 } 727 }
376 728
377 RETVAL = newSVpvn ((const char *)dst, dstp - dst); 729 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
378} 730}
379 OUTPUT: 731 OUTPUT:
… …
541############################################################################# 893#############################################################################
542 894
543MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster 895MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
544 896
545SV * 897SV *
546make_histograms (SV *ar) 898extract_features (SV *ar)
547 CODE: 899 CODE:
548{ 900{
549 int i; 901 int i;
550 AV *av, *result; 902 AV *av, *result;
551 903
552 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) 904 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
553 croak ("Not an array ref as first argument to make_histogram"); 905 croak ("Not an array ref as first argument to extract_features");
554 906
555 av = (AV *) SvRV (ar); 907 av = (AV *) SvRV (ar);
556 result = newAV (); 908 result = newAV ();
557 909
558 for (i = 0; i <= av_len (av); ++i) 910 for (i = 0; i <= av_len (av); ++i)
559 { 911 {
560 const int HISTSIZE = 64;
561
562 int j;
563 SV *sv = *av_fetch (av, i, 1); 912 SV *sv = *av_fetch (av, i, 1);
564 STRLEN len;
565 char *buf = SvPVbyte (sv, len);
566
567 int tmphist[HISTSIZE];
568 float *hist;
569
570 SV *histsv = newSV (HISTSIZE * sizeof (float) + 1); 913 SV *histsv = newSV (9 * sizeof (float) + 1);
914
571 SvPOK_on (histsv); 915 SvPOK_on (histsv);
572 SvCUR_set (histsv, HISTSIZE * sizeof (float)); 916 SvCUR_set (histsv, 9 * sizeof (float));
573 hist = (float *)SvPVX (histsv); 917 float *hist = (float *)SvPVX (histsv);
574 918
575 Zero (tmphist, sizeof (tmphist), char); 919 struct feature f_h, f_s, f_v;
920 feature_init (&f_h);
921 feature_init (&f_s);
922 feature_init (&f_v);
576 923
577 for (j = len; j--; )
578 {
579 unsigned int idx
580 = ((*buf & 0xc0) >> 2)
581 | ((*buf & 0x18) >> 1)
582 | (*buf & 0x03);
583
584 ++tmphist[idx];
585 ++buf;
586 }
587 924 {
588 for (j = 0; j < HISTSIZE; ++j) 925 STRLEN len;
589 hist[j] = (float)tmphist[j] / (len + 1e-30); 926 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
927 while (len >= 3)
928 {
929 unsigned int r, g, b, h, s, v;
930 r = *buf++; g = *buf++; b = *buf++;
931 rgb_to_hsv (r, g, b, &h, &s, &v);
932
933 feature_update_pass_1 (&f_h, h);
934 feature_update_pass_1 (&f_s, s);
935 feature_update_pass_1 (&f_v, v);
936
937 len -= 3;
938 }
939
940 feature_finish_pass_1 (&f_h);
941 feature_finish_pass_1 (&f_s);
942 feature_finish_pass_1 (&f_v);
943 }
944
945 {
946 STRLEN len;
947 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
948 while (len >= 3)
949 {
950 unsigned int r, g, b, h, s, v;
951 r = *buf++; g = *buf++; b = *buf++;
952 rgb_to_hsv (r, g, b, &h, &s, &v);
953
954 feature_update_pass_2 (&f_h, h);
955 feature_update_pass_2 (&f_s, s);
956 feature_update_pass_2 (&f_v, v);
957
958 len -= 3;
959 }
960
961 feature_finish_pass_2 (&f_h);
962 feature_finish_pass_2 (&f_s);
963 feature_finish_pass_2 (&f_v);
964 }
965
966 hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
967 hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
968 hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
590 969
591 av_push (result, histsv); 970 av_push (result, histsv);
592 } 971 }
593 972
594 RETVAL = newRV_noinc ((SV *)result); 973 RETVAL = newRV_noinc ((SV *)result);
595} 974}
596 OUTPUT: 975 OUTPUT:
597 RETVAL 976 RETVAL
598 977
599

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