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Comparing CV/CV.xs (file contents):
Revision 1.22 by root, Sun Aug 14 02:25:44 2005 UTC vs.
Revision 1.53 by root, Sat Dec 23 05:27:04 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>
12#include <jerror.h>
13
14#include <glib.h>
15#include <gtk/gtk.h>
16#include <gdk/gdkx.h>
9#include <gdk-pixbuf/gdk-pixbuf.h> 17#include <gdk-pixbuf/gdk-pixbuf.h>
10 18
11#include <gperl.h> 19#include <gperl.h>
12#include <gtk2perl.h> 20#include <gtk2perl.h>
13 21
22#include <assert.h>
23
24#if WEBP
25#include <webp/decode.h>
26#endif
27
28#include "perlmulticore.h"
29
14#define IW 80 /* MUST match Schnauer.pm! */ 30#define IW 80 /* MUST match Schnauzer.pm! */
15#define IH 60 /* MUST match Schnauer.pm! */ 31#define IH 60 /* MUST match Schnauzer.pm! */
16 32
17#define RAND (seed = (seed + 7141) * 54773 % 134456) 33#define RAND (seed = (seed + 7141) * 54773 % 134456)
18 34
19#define LINELENGTH 240 35#define LINELENGTH 240
20 36
21#define ELLIPSIS "\xe2\x80\xa6" 37#define ELLIPSIS "\xe2\x80\xa6"
38
39typedef char *octet_string;
40
41static magic_t magic_cookie[2]; /* !mime, mime */
22 42
23struct jpg_err_mgr 43struct jpg_err_mgr
24{ 44{
25 struct jpeg_error_mgr err; 45 struct jpeg_error_mgr err;
26 jmp_buf setjmp_buffer; 46 jmp_buf setjmp_buffer;
27}; 47};
28 48
29static void 49static void
30cv_error_exit (j_common_ptr cinfo) 50cv_error_exit (j_common_ptr cinfo)
31{ 51{
52 cinfo->err->output_message (cinfo);
32 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); 53 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
33} 54}
34 55
35static void 56static void
36cv_error_output (j_common_ptr cinfo) 57cv_error_output (j_common_ptr cinfo)
37{ 58{
59 char msg[JMSG_LENGTH_MAX];
60
61 cinfo->err->format_message (cinfo, msg);
62
63 fprintf (stderr, "JPEG decoding error: %s\n", msg);
38 return; 64 return;
39} 65}
40 66
41static void 67static void
42rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, 68rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
… …
63 89
64 *h &= 255; 90 *h &= 255;
65 } 91 }
66} 92}
67 93
94struct feature {
95 float v1, v2, v3; // mean, square, cube
96 int n;
97};
98
99static void
100feature_init (struct feature *f)
101{
102 f->v1 = 0.;
103 f->v2 = 0.;
104 f->v3 = 0.;
105 f->n = 0;
106}
107
108// didn't find an algorithm to neatly do mean, variance and skew in one pass.
109// elmex ist schuld.
110static void
111feature_update_pass_1 (struct feature *f, unsigned int v)
112{
113 f->v1 += v;
114 f->n += 1;
115}
116
117static void
118feature_finish_pass_1 (struct feature *f)
119{
120 if (f->n < 1)
121 return;
122
123 f->v1 /= f->n;
124}
125
126static void
127feature_update_pass_2 (struct feature *f, unsigned int v)
128{
129 float d = v - f->v1;
130
131 f->v2 += d * d;
132 f->v3 += d * d * d;
133}
134
135static void
136feature_finish_pass_2 (struct feature *f)
137{
138 if (f->n < 1)
139 return;
140
141 f->v2 /= f->n;
142 f->v3 /= f->n;
143
144 f->v1 /= 255.;
145 f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
146 f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
147}
148
68static guint32 a85_val; 149static guint32 a85_val;
69static guint a85_cnt; 150static guint a85_cnt;
70static guchar a85_buf[LINELENGTH], *a85_ptr; 151static guchar a85_buf[LINELENGTH], *a85_ptr;
71 152
72static void 153static void
… …
84 if (!--a85_cnt) 165 if (!--a85_cnt)
85 { 166 {
86 a85_cnt = 4; 167 a85_cnt = 4;
87 if (a85_val) 168 if (a85_val)
88 { 169 {
89 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; 170 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
90 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; 171 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
91 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; 172 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
92 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; 173 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
93 a85_ptr[0] = (a85_val ) + 33; 174 a85_ptr[0] = (a85_val ) + 33;
94 175
95 a85_ptr += 5; 176 a85_ptr += 5;
96 } 177 }
… …
120 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); 201 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
121} 202}
122 203
123///////////////////////////////////////////////////////////////////////////// 204/////////////////////////////////////////////////////////////////////////////
124 205
206static void cv_ms_init (j_decompress_ptr cinfo)
207{
208}
209
210static void cv_ms_term (j_decompress_ptr cinfo)
211{
212}
213
214static boolean cv_ms_fill (j_decompress_ptr cinfo)
215{
216 ERREXIT (cinfo, JERR_INPUT_EMPTY);
217
218 return TRUE;
219}
220
221static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes)
222{
223 if (num_bytes > 0)
224 {
225 struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src;
226
227 src->next_input_byte += num_bytes;
228 src->bytes_in_buffer -= num_bytes;
229 }
230}
231
232static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen)
233{
234 struct jpeg_source_mgr *src;
235
236 if (!cinfo->src)
237 cinfo->src = (struct jpeg_source_mgr *)
238 (*cinfo->mem->alloc_small) (
239 (j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)
240 );
241
242 src = (struct jpeg_source_mgr *)cinfo->src;
243 src->init_source = cv_ms_init;
244 src->fill_input_buffer = cv_ms_fill;
245 src->skip_input_data = cv_ms_skip;
246 src->resync_to_restart = jpeg_resync_to_restart;
247 src->term_source = cv_ms_term;
248 src->next_input_byte = (JOCTET *)buf;
249 src->bytes_in_buffer = buflen;
250}
251
252/////////////////////////////////////////////////////////////////////////////
253
125MODULE = Gtk2::CV PACKAGE = Gtk2::CV 254MODULE = Gtk2::CV PACKAGE = Gtk2::CV
126 255
127PROTOTYPES: ENABLE 256PROTOTYPES: ENABLE
128 257
258# missing function in perl. really :)
259int
260common_prefix_length (a, b)
261 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
262 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
263 CODE:
264 RETVAL = 0;
265
266 while (*a == *b && *a)
267 {
268 RETVAL += (*a & 0xc0) != 0x80;
269 a++, b++;
270 }
271
272 OUTPUT:
273 RETVAL
274
275const char *
276magic (SV *path_or_data)
277 ALIAS:
278 magic = 0
279 magic_mime = 1
280 magic_buffer = 2
281 magic_buffer_mime = 3
282 CODE:
283{
284 STRLEN len;
285 char *data = SvPVbyte (path_or_data, len);
286
287 if (!magic_cookie[0])
288 {
289 magic_cookie[0] = magic_open (MAGIC_SYMLINK);
290 magic_cookie[1] = magic_open (MAGIC_SYMLINK | MAGIC_MIME_TYPE);
291 magic_load (magic_cookie[0], 0);
292 magic_load (magic_cookie[1], 0);
293 }
294
295 perlinterp_release ();
296
297 RETVAL = ix & 2
298 ? magic_buffer (magic_cookie[ix & 1], data, len)
299 : magic_file (magic_cookie[ix & 1], data);
300
301 perlinterp_acquire ();
302}
303 OUTPUT:
304 RETVAL
305
129# missing in Gtk2 perl module 306# missing/broken in Gtk2 perl module
307
308void
309gdk_window_clear_hints (GdkWindow *window)
310 CODE:
311 gdk_window_set_geometry_hints (window, 0, 0);
130 312
131gboolean 313gboolean
132gdk_net_wm_supports (GdkAtom property) 314gdk_net_wm_supports (GdkAtom property)
133 CODE: 315 CODE:
134#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) 316#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
… …
138#endif 320#endif
139 OUTPUT: 321 OUTPUT:
140 RETVAL 322 RETVAL
141 323
142GdkPixbuf_noinc * 324GdkPixbuf_noinc *
143transpose (GdkPixbuf *pb) 325dealpha_expose (GdkPixbuf *pb)
144 CODE: 326 CODE:
327 perlinterp_release ();
145{ 328{
146 int w = gdk_pixbuf_get_width (pb); 329 int w = gdk_pixbuf_get_width (pb);
147 int h = gdk_pixbuf_get_height (pb); 330 int h = gdk_pixbuf_get_height (pb);
148 int bpp = gdk_pixbuf_get_n_channels (pb); 331 int bpp = gdk_pixbuf_get_n_channels (pb);
149 int x, y, i; 332 int x, y, i;
150 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 333 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
151 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 334 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
152 335
153 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); 336 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
154 337
155 dst = gdk_pixbuf_get_pixels (RETVAL); 338 dst = gdk_pixbuf_get_pixels (RETVAL);
156 dstr = gdk_pixbuf_get_rowstride (RETVAL); 339 dstr = gdk_pixbuf_get_rowstride (RETVAL);
157 340
158 for (y = 0; y < h; y++)
159 for (x = 0; x < w; x++) 341 for (x = 0; x < w; x++)
342 for (y = 0; y < h; y++)
160 for (i = 0; i < bpp; i++) 343 for (i = 0; i < 3; i++)
161 dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i]; 344 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
162} 345}
346 perlinterp_acquire ();
163 OUTPUT: 347 OUTPUT:
164 RETVAL 348 RETVAL
165 349
166GdkPixbuf_noinc * 350GdkPixbuf_noinc *
167flop (GdkPixbuf *pb) 351rotate (GdkPixbuf *pb, int angle)
168 CODE: 352 CODE:
169{ 353 perlinterp_release ();
170 int w = gdk_pixbuf_get_width (pb); 354 if (angle < 0)
171 int h = gdk_pixbuf_get_height (pb); 355 angle += 360;
172 int bpp = gdk_pixbuf_get_n_channels (pb); 356 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
173 int x, y, i; 357 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
174 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 358 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
175 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 359 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
176 360 : angle);
177 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); 361 perlinterp_acquire ();
178
179 dst = gdk_pixbuf_get_pixels (RETVAL);
180 dstr = gdk_pixbuf_get_rowstride (RETVAL);
181
182 for (y = 0; y < h; y++)
183 for (x = 0; x < w; x++)
184 for (i = 0; i < bpp; i++)
185 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
186}
187 OUTPUT: 362 OUTPUT:
188 RETVAL 363 RETVAL
189 364
365const char *
366filetype (SV *image_data)
367 CODE:
368{
369 STRLEN data_len;
370 U8 *data = SvPVbyte (image_data, data_len);
371
372 if (data_len >= 20
373 && data[0] == 0xff
374 && data[1] == 0xd8
375 && data[2] == 0xff)
376 RETVAL = "jpg";
377 else if (data_len >= 12
378 && data[ 0] == (U8)'R'
379 && data[ 1] == (U8)'I'
380 && data[ 2] == (U8)'F'
381 && data[ 3] == (U8)'F'
382 && data[ 8] == (U8)'W'
383 && data[ 9] == (U8)'E'
384 && data[10] == (U8)'B'
385 && data[11] == (U8)'P')
386 RETVAL = "webp";
387 else if (data_len >= 16
388 && data[ 0] == 0x89
389 && data[ 1] == (U8)'P'
390 && data[ 2] == (U8)'N'
391 && data[ 3] == (U8)'G'
392 && data[ 4] == 0x0d
393 && data[ 5] == 0x0a
394 && data[ 6] == 0x1a
395 && data[ 7] == 0x0a)
396 RETVAL = "png";
397 else
398 RETVAL = "other";
399}
400 OUTPUT:
401 RETVAL
402
190GdkPixbuf_noinc * 403GdkPixbuf_noinc *
191load_jpeg (char *path, int thumbnail=0) 404decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
405 CODE:
406{
407#if WEBP
408 guchar *data;
409 STRLEN data_size;
410 int alpha;
411 WebPDecoderConfig config;
412 int inw, inh;
413
414 data = SvPVbyte (image_data, data_size);
415
416 perlinterp_release ();
417
418 RETVAL = 0;
419
420 if (!WebPInitDecoderConfig (&config))
421 goto err;
422
423 config.options.use_threads = 1;
424
425 if (WebPGetFeatures (data, data_size, &config.input) != VP8_STATUS_OK)
426 goto err;
427
428 inw = config.input.width;
429 inh = config.input.height;
430
431 if (thumbnail)
432 {
433 if (inw * ih > inh * iw)
434 ih = (iw * inh + inw - 1) / inw;
435 else
436 iw = (ih * inw + inh - 1) / inh;
437
438 config.options.bypass_filtering = 1;
439 config.options.no_fancy_upsampling = 1;
440
441 config.options.use_scaling = 1;
442 config.options.scaled_width = iw;
443 config.options.scaled_height = ih;
444 }
445 else
446 {
447 iw = inw;
448 ih = inh;
449 }
450
451 alpha = config.input.has_alpha;
452
453 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!alpha, 8, iw, ih);
454 if (!RETVAL)
455 goto err;
456
457 config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
458 config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
459 config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
460 config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
461 config.output.is_external_memory = 1;
462
463 if (WebPDecode (data, data_size, &config) != VP8_STATUS_OK)
464 {
465 g_object_unref (RETVAL);
466 RETVAL = 0;
467 goto err;
468 }
469
470 err:
471 perlinterp_acquire ();
472#else
473 croak ("load_webp: webp not enabled at compile time");
474#endif
475}
476 OUTPUT:
477 RETVAL
478
479GdkPixbuf_noinc *
480decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
192 CODE: 481 CODE:
193{ 482{
194 struct jpeg_decompress_struct cinfo; 483 struct jpeg_decompress_struct cinfo;
195 struct jpg_err_mgr jerr; 484 struct jpg_err_mgr jerr;
196 guchar *data;
197 int rs; 485 int rs;
198 FILE *fp;
199 volatile GdkPixbuf *pb = 0; 486 volatile GdkPixbuf *pb = 0;
487 STRLEN data_len;
488 guchar *data = SvPVbyte (image_data, data_len);
489
200 RETVAL = 0; 490 RETVAL = 0;
201 491
202 if (!(fp = fopen (path, "rb"))) 492 perlinterp_release ();
203 XSRETURN_UNDEF;
204 493
205 cinfo.err = jpeg_std_error (&jerr.err); 494 cinfo.err = jpeg_std_error (&jerr.err);
206 495
207 jerr.err.error_exit = cv_error_exit; 496 jerr.err.error_exit = cv_error_exit;
208 jerr.err.output_message = cv_error_output; 497 jerr.err.output_message = cv_error_output;
209 498
210 if ((rs = setjmp (jerr.setjmp_buffer))) 499 if ((rs = setjmp (jerr.setjmp_buffer)))
211 { 500 {
212 fclose (fp);
213 jpeg_destroy_decompress (&cinfo); 501 jpeg_destroy_decompress (&cinfo);
214 502
215 if (pb) 503 if (pb)
216 g_object_unref ((gpointer)pb); 504 g_object_unref ((gpointer)pb);
217 505
506 perlinterp_acquire ();
218 XSRETURN_UNDEF; 507 XSRETURN_UNDEF;
219 } 508 }
220 509
221 jpeg_create_decompress (&cinfo); 510 jpeg_create_decompress (&cinfo);
511 cv_jpeg_mem_src (&cinfo, data, data_len);
222 512
223 jpeg_stdio_src (&cinfo, fp);
224 jpeg_read_header (&cinfo, TRUE); 513 jpeg_read_header (&cinfo, TRUE);
225 514
226 cinfo.dct_method = JDCT_DEFAULT; 515 cinfo.dct_method = JDCT_DEFAULT;
227 cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */ 516 cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
228 cinfo.do_block_smoothing = FALSE; 517 cinfo.do_block_smoothing = FALSE;
… …
238 { 527 {
239 cinfo.dct_method = JDCT_FASTEST; 528 cinfo.dct_method = JDCT_FASTEST;
240 cinfo.do_fancy_upsampling = FALSE; 529 cinfo.do_fancy_upsampling = FALSE;
241 530
242 while (cinfo.scale_denom < 8 531 while (cinfo.scale_denom < 8
243 && cinfo.output_width >= IW*4 532 && cinfo.output_width >= iw*4
244 && cinfo.output_height >= IH*4) 533 && cinfo.output_height >= ih*4)
245 { 534 {
246 cinfo.scale_denom <<= 1; 535 cinfo.scale_denom <<= 1;
247 jpeg_calc_output_dimensions (&cinfo); 536 jpeg_calc_output_dimensions (&cinfo);
248 } 537 }
249 } 538 }
250 539
540 if (cinfo.output_components != 3)
541 longjmp (jerr.setjmp_buffer, 3);
542
543 if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK)
544 {
545 cinfo.out_color_space = JCS_CMYK;
546 cinfo.output_components = 4;
547 }
548
251 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height); 549 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
252 if (!RETVAL) 550 if (!RETVAL)
253 longjmp (jerr.setjmp_buffer, 2); 551 longjmp (jerr.setjmp_buffer, 2);
254 552
255 data = gdk_pixbuf_get_pixels (RETVAL); 553 data = gdk_pixbuf_get_pixels (RETVAL);
256 rs = gdk_pixbuf_get_rowstride (RETVAL); 554 rs = gdk_pixbuf_get_rowstride (RETVAL);
257
258 if (cinfo.output_components != 3)
259 longjmp (jerr.setjmp_buffer, 3);
260 555
261 jpeg_start_decompress (&cinfo); 556 jpeg_start_decompress (&cinfo);
262 557
263 while (cinfo.output_scanline < cinfo.output_height) 558 while (cinfo.output_scanline < cinfo.output_height)
264 { 559 {
… …
271 rp [3] = (guchar *)rp [2] + rs; 566 rp [3] = (guchar *)rp [2] + rs;
272 567
273 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); 568 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
274 } 569 }
275 570
571 if (cinfo.out_color_space == JCS_CMYK)
572 {
573 guchar *end = data + cinfo.output_height * rs;
574
575 while (data < end)
576 {
577 U32 c = data [0];
578 U32 m = data [1];
579 U32 y = data [2];
580 U32 k = data [3];
581
582 if (0)
583 if (cinfo.Adobe_transform == 2)
584 {
585 c ^= 0xff;
586 m ^= 0xff;
587 y ^= 0xff;
588 k ^= 0xff;
589 }
590
591 data [0] = (c * k + 0x80) / 0xff;
592 data [1] = (m * k + 0x80) / 0xff;
593 data [2] = (y * k + 0x80) / 0xff;
594 data [3] = 0xff;
595
596 data += 4;
597 }
598 }
599
276 jpeg_finish_decompress (&cinfo); 600 jpeg_finish_decompress (&cinfo);
277 fclose (fp);
278 jpeg_destroy_decompress (&cinfo); 601 jpeg_destroy_decompress (&cinfo);
602 perlinterp_acquire ();
279} 603}
280 OUTPUT: 604 OUTPUT:
281 RETVAL 605 RETVAL
282 606
607void
608compare (GdkPixbuf *a, GdkPixbuf *b)
609 PPCODE:
610 perlinterp_release ();
611{
612 int w = gdk_pixbuf_get_width (a);
613 int h = gdk_pixbuf_get_height (a);
614
615 int sa = gdk_pixbuf_get_rowstride (a);
616 int sb = gdk_pixbuf_get_rowstride (b);
617
618 guchar *pa = gdk_pixbuf_get_pixels (a);
619 guchar *pb = gdk_pixbuf_get_pixels (b);
620
621 int x, y;
622
623 assert (w == gdk_pixbuf_get_width (b));
624 assert (h == gdk_pixbuf_get_height (b));
625
626 assert (gdk_pixbuf_get_n_channels (a) == 3);
627 assert (gdk_pixbuf_get_n_channels (b) == 3);
628
629 double diff = 0.;
630 int peak = 0;
631
632 if (w && h)
633 for (y = 0; y < h; y++)
634 {
635 guchar *pa_ = pa + y * sa;
636 guchar *pb_ = pb + y * sb;
637
638 for (x = 0; x < w; x++)
639 {
640 int d;
641
642 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
643 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
644 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
645 }
646 }
647
648 perlinterp_acquire ();
649
650 EXTEND (SP, 2);
651 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
652 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
653}
654
283############################################################################# 655#############################################################################
284 656
285MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 657MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
658
659# currently only works for filenames (octet strings)
286 660
287SV * 661SV *
288foldcase (SV *pathsv) 662foldcase (SV *pathsv)
289 PROTOTYPE: $ 663 PROTOTYPE: $
290 CODE: 664 CODE:
291{ 665{
292 STRLEN plen; 666 STRLEN plen;
293 U8 *path = SvPVutf8 (pathsv, plen); 667 U8 *path = (U8 *)SvPV (pathsv, plen);
294 U8 *pend = path + plen; 668 U8 *pend = path + plen;
295 U8 dst [plen * 6 * 3], *dstp = dst; 669 U8 dst [plen * 6 * 3], *dstp = dst;
296 670
297 while (path < pend) 671 while (path < pend)
298 { 672 {
299 U8 ch = *path; 673 U8 ch = *path;
300 674
301 if (ch >= 'a' && ch <= 'z') 675 if (ch >= 'a' && ch <= 'z')
302 *dstp++ = *path++; 676 *dstp++ = *path++;
677 else if (ch >= 'A' && ch <= 'Z')
678 *dstp++ = *path++ + ('a' - 'A');
303 else if (ch >= '0' && ch <= '9') 679 else if (ch >= '0' && ch <= '9')
304 { 680 {
305 STRLEN el, nl = 0; 681 STRLEN el, nl = 0;
306 while (*path >= '0' && *path <= '9' && path < pend) 682 while (*path >= '0' && *path <= '9' && path < pend)
307 path++, nl++; 683 path++, nl++;
… …
310 *dstp++ = '0'; 686 *dstp++ = '0';
311 687
312 memcpy (dstp, path - nl, nl); 688 memcpy (dstp, path - nl, nl);
313 dstp += nl; 689 dstp += nl;
314 } 690 }
691 else
692 *dstp++ = *path++;
693#if 0
315 else 694 else
316 { 695 {
317 STRLEN cl; 696 STRLEN cl;
318 to_utf8_fold (path, dstp, &cl); 697 to_utf8_fold (path, dstp, &cl);
319 dstp += cl; 698 dstp += cl;
320 path += is_utf8_char (path); 699 path += is_utf8_char (path);
321 } 700 }
701#endif
322 } 702 }
323 703
324 RETVAL = newSVpvn (dst, dstp - dst); 704 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
325} 705}
326 OUTPUT: 706 OUTPUT:
327 RETVAL 707 RETVAL
328 708
329GdkPixbuf_noinc * 709GdkPixbuf_noinc *
330p7_to_pb (int w, int h, guchar *src) 710p7_to_pb (int w, int h, SV *src_sv)
331 PROTOTYPE: @ 711 PROTOTYPE: @
332 CODE: 712 CODE:
333{ 713{
334 int x, y; 714 int x, y;
335 guchar *dst, *d; 715 guchar *dst, *d;
336 int dstr; 716 int dstr;
717 guchar *src = (guchar *)SvPVbyte_nolen (src_sv);
337 718
338 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); 719 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
339 dst = gdk_pixbuf_get_pixels (RETVAL); 720 dst = gdk_pixbuf_get_pixels (RETVAL);
340 dstr = gdk_pixbuf_get_rowstride (RETVAL); 721 dstr = gdk_pixbuf_get_rowstride (RETVAL);
341 722
… …
350 } 731 }
351} 732}
352 OUTPUT: 733 OUTPUT:
353 RETVAL 734 RETVAL
354 735
736#############################################################################
737
738MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
739
740void
741dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
742 CODE:
743{
744 int w = gdk_pixbuf_get_width (pb);
745 int h = gdk_pixbuf_get_height (pb);
746 int x, y, i;
747 guchar *dst;
748 int bpp = gdk_pixbuf_get_n_channels (pb);
749 guchar *src = gdk_pixbuf_get_pixels (pb);
750 int sstr = gdk_pixbuf_get_rowstride (pb);
751
752 a85_init ();
753
754 for (y = 0; y < h; y++)
755 for (x = 0; x < w; x++)
756 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
757 a85_push (fp, src [x * bpp + y * sstr + i]);
758
759 a85_finish (fp);
760}
761
762void
763dump_binary (PerlIO *fp, GdkPixbuf *pb)
764 CODE:
765{
766 int w = gdk_pixbuf_get_width (pb);
767 int h = gdk_pixbuf_get_height (pb);
768 int x, y, i;
769 guchar *dst;
770 int bpp = gdk_pixbuf_get_n_channels (pb);
771 guchar *src = gdk_pixbuf_get_pixels (pb);
772 int sstr = gdk_pixbuf_get_rowstride (pb);
773
774 for (y = 0; y < h; y++)
775 for (x = 0; x < w; x++)
776 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
777 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
778}
779
780#############################################################################
781
782MODULE = Gtk2::CV PACKAGE = Gtk2::CV
783
355SV * 784SV *
356pb_to_p7 (GdkPixbuf *pb) 785pb_to_hv84 (GdkPixbuf *pb)
357 CODE: 786 CODE:
358{ 787{
359 int w = gdk_pixbuf_get_width (pb); 788 int w = gdk_pixbuf_get_width (pb);
360 int h = gdk_pixbuf_get_height (pb); 789 int h = gdk_pixbuf_get_height (pb);
361 int x, y; 790 int x, y;
362 guchar *dst; 791 guchar *dst;
363 int bpp = gdk_pixbuf_get_n_channels (pb); 792 int bpp = gdk_pixbuf_get_n_channels (pb);
364 guchar *src = gdk_pixbuf_get_pixels (pb); 793 guchar *src = gdk_pixbuf_get_pixels (pb);
365 int sstr = gdk_pixbuf_get_rowstride (pb); 794 int sstr = gdk_pixbuf_get_rowstride (pb);
366 int Er[IW], Eg[IW], Eb[IW];
367 int seed = 77;
368
369 RETVAL = newSV (w * h);
370 SvPOK_only (RETVAL);
371 SvCUR_set (RETVAL, w * h);
372
373 dst = SvPVX (RETVAL);
374
375 memset (Er, 0, sizeof (int) * IW);
376 memset (Eg, 0, sizeof (int) * IW);
377 memset (Eb, 0, sizeof (int) * IW);
378
379 /* some primitive error distribution + random dithering */
380
381 for (y = 0; y < h; y++)
382 {
383 int er = 0, eg = 0, eb = 0;
384
385 for (x = 0; x < w; x++)
386 {
387 int r, g, b;
388 guchar *p = src + x * bpp + y * sstr;
389
390 r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
391 g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
392 b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
393
394 r = r > 7 ? 7 : r < 0 ? 0 : r;
395 g = g > 7 ? 7 : g < 0 ? 0 : g;
396 b = b > 3 ? 3 : b < 0 ? 0 : b;
397
398 er += p[0] - (r * 255 + 4) / 7;
399 eg += p[1] - (g * 255 + 4) / 7;
400 eb += p[2] - (b * 255 + 2) / 3;
401
402 Er[x] = er >> 1; er -= (er + 1) >> 1;
403 Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
404 Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
405
406 *dst++ = r << 5 | g << 2 | b;
407 }
408 }
409}
410 OUTPUT:
411 RETVAL
412
413#############################################################################
414
415MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
416
417void
418dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
419 CODE:
420{
421 int w = gdk_pixbuf_get_width (pb);
422 int h = gdk_pixbuf_get_height (pb);
423 int x, y, i;
424 guchar *dst;
425 int bpp = gdk_pixbuf_get_n_channels (pb);
426 guchar *src = gdk_pixbuf_get_pixels (pb);
427 int sstr = gdk_pixbuf_get_rowstride (pb);
428
429 a85_init ();
430
431 for (y = 0; y < h; y++)
432 for (x = 0; x < w; x++)
433 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
434 a85_push (fp, src [x * bpp + y * sstr + i]);
435
436 a85_finish (fp);
437}
438
439void
440dump_binary (PerlIO *fp, GdkPixbuf *pb)
441 CODE:
442{
443 int w = gdk_pixbuf_get_width (pb);
444 int h = gdk_pixbuf_get_height (pb);
445 int x, y, i;
446 guchar *dst;
447 int bpp = gdk_pixbuf_get_n_channels (pb);
448 guchar *src = gdk_pixbuf_get_pixels (pb);
449 int sstr = gdk_pixbuf_get_rowstride (pb);
450
451 for (y = 0; y < h; y++)
452 for (x = 0; x < w; x++)
453 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
454 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
455}
456
457#############################################################################
458
459MODULE = Gtk2::CV PACKAGE = Gtk2::CV
460
461SV *
462pb_to_hv84 (GdkPixbuf *pb)
463 CODE:
464{
465 int w = gdk_pixbuf_get_width (pb);
466 int h = gdk_pixbuf_get_height (pb);
467 int x, y;
468 guchar *dst;
469 int bpp = gdk_pixbuf_get_n_channels (pb);
470 guchar *src = gdk_pixbuf_get_pixels (pb);
471 int sstr = gdk_pixbuf_get_rowstride (pb);
472 795
473 RETVAL = newSV (6 * 8 * 12 / 8); 796 RETVAL = newSV (6 * 8 * 12 / 8);
474 SvPOK_only (RETVAL); 797 SvPOK_only (RETVAL);
475 SvCUR_set (RETVAL, 6 * 8 * 12 / 8); 798 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
476 799
477 dst = SvPVX (RETVAL); 800 dst = (guchar *)SvPVX (RETVAL);
478 801
479 /* some primitive error distribution + random dithering */ 802 /* some primitive error distribution + random dithering */
480 803
481 for (y = 0; y < h; y++) 804 for (y = 0; y < h; y++)
482 { 805 {
… …
545############################################################################# 868#############################################################################
546 869
547MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster 870MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
548 871
549SV * 872SV *
550make_histograms (SV *ar) 873extract_features (SV *ar)
551 CODE: 874 CODE:
552{ 875{
553 int i; 876 int i;
554 AV *av, *result; 877 AV *av, *result;
555 878
556 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) 879 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
557 croak ("Not an array ref as first argument to make_histogram"); 880 croak ("Not an array ref as first argument to extract_features");
558 881
559 av = (AV *) SvRV (ar); 882 av = (AV *) SvRV (ar);
560 result = newAV (); 883 result = newAV ();
561 884
562 for (i = 0; i <= av_len (av); ++i) 885 for (i = 0; i <= av_len (av); ++i)
563 { 886 {
564 const int HISTSIZE = 64;
565
566 int j;
567 SV *sv = *av_fetch (av, i, 1); 887 SV *sv = *av_fetch (av, i, 1);
568 STRLEN len;
569 char *buf = SvPVbyte (sv, len);
570
571 int tmphist[HISTSIZE];
572 float *hist;
573
574 SV *histsv = newSV (HISTSIZE * sizeof (float) + 1); 888 SV *histsv = newSV (9 * sizeof (float) + 1);
889
575 SvPOK_on (histsv); 890 SvPOK_on (histsv);
576 SvCUR_set (histsv, HISTSIZE * sizeof (float)); 891 SvCUR_set (histsv, 9 * sizeof (float));
577 hist = (float *)SvPVX (histsv); 892 float *hist = (float *)SvPVX (histsv);
578 893
579 Zero (tmphist, sizeof (tmphist), char); 894 struct feature f_h, f_s, f_v;
895 feature_init (&f_h);
896 feature_init (&f_s);
897 feature_init (&f_v);
580 898
581 for (j = len; j--; )
582 {
583 unsigned int idx
584 = ((*buf & 0xc0) >> 2)
585 | ((*buf & 0x18) >> 1)
586 | (*buf & 0x03);
587
588 ++tmphist[idx];
589 ++buf;
590 }
591 899 {
592 for (j = 0; j < HISTSIZE; ++j) 900 STRLEN len;
593 hist[j] = (float)tmphist[j] / (len + 1e-30); 901 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
902 while (len >= 3)
903 {
904 unsigned int r, g, b, h, s, v;
905 r = *buf++; g = *buf++; b = *buf++;
906 rgb_to_hsv (r, g, b, &h, &s, &v);
907
908 feature_update_pass_1 (&f_h, h);
909 feature_update_pass_1 (&f_s, s);
910 feature_update_pass_1 (&f_v, v);
911
912 len -= 3;
913 }
914
915 feature_finish_pass_1 (&f_h);
916 feature_finish_pass_1 (&f_s);
917 feature_finish_pass_1 (&f_v);
918 }
919
920 {
921 STRLEN len;
922 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
923 while (len >= 3)
924 {
925 unsigned int r, g, b, h, s, v;
926 r = *buf++; g = *buf++; b = *buf++;
927 rgb_to_hsv (r, g, b, &h, &s, &v);
928
929 feature_update_pass_2 (&f_h, h);
930 feature_update_pass_2 (&f_s, s);
931 feature_update_pass_2 (&f_v, v);
932
933 len -= 3;
934 }
935
936 feature_finish_pass_2 (&f_h);
937 feature_finish_pass_2 (&f_s);
938 feature_finish_pass_2 (&f_v);
939 }
940
941 hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
942 hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
943 hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
594 944
595 av_push (result, histsv); 945 av_push (result, histsv);
596 } 946 }
597 947
598 RETVAL = newRV_noinc ((SV *)result); 948 RETVAL = newRV_noinc ((SV *)result);
599} 949}
600 OUTPUT: 950 OUTPUT:
601 RETVAL 951 RETVAL
602 952
603

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