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Comparing CV/CV.xs (file contents):
Revision 1.26 by root, Sun Aug 21 02:18:30 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
9#include <glib.h> 14#include <glib.h>
10#include <gtk/gtk.h> 15#include <gtk/gtk.h>
16#include <gdk/gdkx.h>
11#include <gdk-pixbuf/gdk-pixbuf.h> 17#include <gdk-pixbuf/gdk-pixbuf.h>
12 18
13#include <gperl.h> 19#include <gperl.h>
14#include <gtk2perl.h> 20#include <gtk2perl.h>
15 21
22#include <assert.h>
23
24#if WEBP
25#include <webp/decode.h>
26#endif
27
28#include "perlmulticore.h"
29
16#define IW 80 /* MUST match Schnauer.pm! */ 30#define IW 80 /* MUST match Schnauzer.pm! */
17#define IH 60 /* MUST match Schnauer.pm! */ 31#define IH 60 /* MUST match Schnauzer.pm! */
18 32
19#define RAND (seed = (seed + 7141) * 54773 % 134456) 33#define RAND (seed = (seed + 7141) * 54773 % 134456)
20 34
21#define LINELENGTH 240 35#define LINELENGTH 240
22 36
23#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 */
24 42
25struct jpg_err_mgr 43struct jpg_err_mgr
26{ 44{
27 struct jpeg_error_mgr err; 45 struct jpeg_error_mgr err;
28 jmp_buf setjmp_buffer; 46 jmp_buf setjmp_buffer;
29}; 47};
30 48
31static void 49static void
32cv_error_exit (j_common_ptr cinfo) 50cv_error_exit (j_common_ptr cinfo)
33{ 51{
52 cinfo->err->output_message (cinfo);
34 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); 53 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
35} 54}
36 55
37static void 56static void
38cv_error_output (j_common_ptr cinfo) 57cv_error_output (j_common_ptr cinfo)
39{ 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);
40 return; 64 return;
41} 65}
42 66
43static void 67static void
44rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, 68rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
… …
65 89
66 *h &= 255; 90 *h &= 255;
67 } 91 }
68} 92}
69 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
70static guint32 a85_val; 149static guint32 a85_val;
71static guint a85_cnt; 150static guint a85_cnt;
72static guchar a85_buf[LINELENGTH], *a85_ptr; 151static guchar a85_buf[LINELENGTH], *a85_ptr;
73 152
74static void 153static void
… …
86 if (!--a85_cnt) 165 if (!--a85_cnt)
87 { 166 {
88 a85_cnt = 4; 167 a85_cnt = 4;
89 if (a85_val) 168 if (a85_val)
90 { 169 {
91 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; 170 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
92 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; 171 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
93 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; 172 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
94 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; 173 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
95 a85_ptr[0] = (a85_val ) + 33; 174 a85_ptr[0] = (a85_val ) + 33;
96 175
97 a85_ptr += 5; 176 a85_ptr += 5;
98 } 177 }
… …
122 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); 201 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
123} 202}
124 203
125///////////////////////////////////////////////////////////////////////////// 204/////////////////////////////////////////////////////////////////////////////
126 205
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
127MODULE = Gtk2::CV PACKAGE = Gtk2::CV 254MODULE = Gtk2::CV PACKAGE = Gtk2::CV
128 255
129PROTOTYPES: ENABLE 256PROTOTYPES: ENABLE
130 257
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
131# 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);
132 312
133gboolean 313gboolean
134gdk_net_wm_supports (GdkAtom property) 314gdk_net_wm_supports (GdkAtom property)
135 CODE: 315 CODE:
136#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) 316#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
… …
142 RETVAL 322 RETVAL
143 323
144GdkPixbuf_noinc * 324GdkPixbuf_noinc *
145dealpha_expose (GdkPixbuf *pb) 325dealpha_expose (GdkPixbuf *pb)
146 CODE: 326 CODE:
147{ 327 perlinterp_release ();
148 int w = gdk_pixbuf_get_width (pb);
149 int h = gdk_pixbuf_get_height (pb);
150 fprintf (stderr, "new %d %d\n", w, h);
151 int bpp = gdk_pixbuf_get_n_channels (pb);
152 int x, y, i;
153 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
154 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
155
156 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
157
158 dst = gdk_pixbuf_get_pixels (RETVAL);
159 dstr = gdk_pixbuf_get_rowstride (RETVAL);
160
161 for (x = 0; x < w; x++)
162 for (y = 0; y < h; y++)
163 for (i = 0; i < 3; i++)
164 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
165}
166 OUTPUT:
167 RETVAL
168
169GdkPixbuf_noinc *
170transpose (GdkPixbuf *pb)
171 CODE:
172{ 328{
173 int w = gdk_pixbuf_get_width (pb); 329 int w = gdk_pixbuf_get_width (pb);
174 int h = gdk_pixbuf_get_height (pb); 330 int h = gdk_pixbuf_get_height (pb);
175 int bpp = gdk_pixbuf_get_n_channels (pb); 331 int bpp = gdk_pixbuf_get_n_channels (pb);
176 int x, y, i; 332 int x, y, i;
177 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 333 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
178 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 334 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
179 335
180 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); 336 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
181 337
182 dst = gdk_pixbuf_get_pixels (RETVAL); 338 dst = gdk_pixbuf_get_pixels (RETVAL);
183 dstr = gdk_pixbuf_get_rowstride (RETVAL); 339 dstr = gdk_pixbuf_get_rowstride (RETVAL);
184 340
185 for (y = 0; y < h; y++)
186 for (x = 0; x < w; x++) 341 for (x = 0; x < w; x++)
342 for (y = 0; y < h; y++)
187 for (i = 0; i < bpp; i++) 343 for (i = 0; i < 3; i++)
188 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];
189} 345}
346 perlinterp_acquire ();
190 OUTPUT: 347 OUTPUT:
191 RETVAL 348 RETVAL
192 349
193GdkPixbuf_noinc * 350GdkPixbuf_noinc *
194flop (GdkPixbuf *pb) 351rotate (GdkPixbuf *pb, int angle)
195 CODE: 352 CODE:
196{ 353 perlinterp_release ();
197 int w = gdk_pixbuf_get_width (pb); 354 if (angle < 0)
198 int h = gdk_pixbuf_get_height (pb); 355 angle += 360;
199 int bpp = gdk_pixbuf_get_n_channels (pb); 356 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
200 int x, y, i; 357 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
201 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 358 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
202 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 359 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
203 360 : angle);
204 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); 361 perlinterp_acquire ();
205
206 dst = gdk_pixbuf_get_pixels (RETVAL);
207 dstr = gdk_pixbuf_get_rowstride (RETVAL);
208
209 for (y = 0; y < h; y++)
210 for (x = 0; x < w; x++)
211 for (i = 0; i < bpp; i++)
212 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
213}
214 OUTPUT: 362 OUTPUT:
215 RETVAL 363 RETVAL
216 364
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
217GdkPixbuf_noinc * 403GdkPixbuf_noinc *
218load_jpeg (SV *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)
219 CODE: 481 CODE:
220{ 482{
221 struct jpeg_decompress_struct cinfo; 483 struct jpeg_decompress_struct cinfo;
222 struct jpg_err_mgr jerr; 484 struct jpg_err_mgr jerr;
223 guchar *data;
224 int rs; 485 int rs;
225 FILE *fp;
226 volatile GdkPixbuf *pb = 0; 486 volatile GdkPixbuf *pb = 0;
227 gchar *filename; 487 STRLEN data_len;
488 guchar *data = SvPVbyte (image_data, data_len);
228 489
229 RETVAL = 0; 490 RETVAL = 0;
230 491
231 filename = g_filename_from_utf8 (SvPVutf8_nolen (path), -1, 0, 0, 0); 492 perlinterp_release ();
232 fp = fopen (filename, "rb");
233 g_free (filename);
234
235 if (!fp)
236 XSRETURN_UNDEF;
237 493
238 cinfo.err = jpeg_std_error (&jerr.err); 494 cinfo.err = jpeg_std_error (&jerr.err);
239 495
240 jerr.err.error_exit = cv_error_exit; 496 jerr.err.error_exit = cv_error_exit;
241 jerr.err.output_message = cv_error_output; 497 jerr.err.output_message = cv_error_output;
242 498
243 if ((rs = setjmp (jerr.setjmp_buffer))) 499 if ((rs = setjmp (jerr.setjmp_buffer)))
244 { 500 {
245 fclose (fp);
246 jpeg_destroy_decompress (&cinfo); 501 jpeg_destroy_decompress (&cinfo);
247 502
248 if (pb) 503 if (pb)
249 g_object_unref ((gpointer)pb); 504 g_object_unref ((gpointer)pb);
250 505
506 perlinterp_acquire ();
251 XSRETURN_UNDEF; 507 XSRETURN_UNDEF;
252 } 508 }
253 509
254 jpeg_create_decompress (&cinfo); 510 jpeg_create_decompress (&cinfo);
511 cv_jpeg_mem_src (&cinfo, data, data_len);
255 512
256 jpeg_stdio_src (&cinfo, fp);
257 jpeg_read_header (&cinfo, TRUE); 513 jpeg_read_header (&cinfo, TRUE);
258 514
259 cinfo.dct_method = JDCT_DEFAULT; 515 cinfo.dct_method = JDCT_DEFAULT;
260 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 */
261 cinfo.do_block_smoothing = FALSE; 517 cinfo.do_block_smoothing = FALSE;
… …
271 { 527 {
272 cinfo.dct_method = JDCT_FASTEST; 528 cinfo.dct_method = JDCT_FASTEST;
273 cinfo.do_fancy_upsampling = FALSE; 529 cinfo.do_fancy_upsampling = FALSE;
274 530
275 while (cinfo.scale_denom < 8 531 while (cinfo.scale_denom < 8
276 && cinfo.output_width >= IW*4 532 && cinfo.output_width >= iw*4
277 && cinfo.output_height >= IH*4) 533 && cinfo.output_height >= ih*4)
278 { 534 {
279 cinfo.scale_denom <<= 1; 535 cinfo.scale_denom <<= 1;
280 jpeg_calc_output_dimensions (&cinfo); 536 jpeg_calc_output_dimensions (&cinfo);
281 } 537 }
282 } 538 }
283 539
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
284 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);
285 if (!RETVAL) 550 if (!RETVAL)
286 longjmp (jerr.setjmp_buffer, 2); 551 longjmp (jerr.setjmp_buffer, 2);
287 552
288 data = gdk_pixbuf_get_pixels (RETVAL); 553 data = gdk_pixbuf_get_pixels (RETVAL);
289 rs = gdk_pixbuf_get_rowstride (RETVAL); 554 rs = gdk_pixbuf_get_rowstride (RETVAL);
290
291 if (cinfo.output_components != 3)
292 longjmp (jerr.setjmp_buffer, 3);
293 555
294 jpeg_start_decompress (&cinfo); 556 jpeg_start_decompress (&cinfo);
295 557
296 while (cinfo.output_scanline < cinfo.output_height) 558 while (cinfo.output_scanline < cinfo.output_height)
297 { 559 {
… …
304 rp [3] = (guchar *)rp [2] + rs; 566 rp [3] = (guchar *)rp [2] + rs;
305 567
306 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); 568 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
307 } 569 }
308 570
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
309 jpeg_finish_decompress (&cinfo); 600 jpeg_finish_decompress (&cinfo);
310 fclose (fp);
311 jpeg_destroy_decompress (&cinfo); 601 jpeg_destroy_decompress (&cinfo);
602 perlinterp_acquire ();
312} 603}
313 OUTPUT: 604 OUTPUT:
314 RETVAL 605 RETVAL
315 606
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
316############################################################################# 655#############################################################################
317 656
318MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 657MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
658
659# currently only works for filenames (octet strings)
319 660
320SV * 661SV *
321foldcase (SV *pathsv) 662foldcase (SV *pathsv)
322 PROTOTYPE: $ 663 PROTOTYPE: $
323 CODE: 664 CODE:
324{ 665{
325 STRLEN plen; 666 STRLEN plen;
326 U8 *path = (U8 *)SvPVutf8 (pathsv, plen); 667 U8 *path = (U8 *)SvPV (pathsv, plen);
327 U8 *pend = path + plen; 668 U8 *pend = path + plen;
328 U8 dst [plen * 6 * 3], *dstp = dst; 669 U8 dst [plen * 6 * 3], *dstp = dst;
329 670
330 while (path < pend) 671 while (path < pend)
331 { 672 {
332 U8 ch = *path; 673 U8 ch = *path;
333 674
334 if (ch >= 'a' && ch <= 'z') 675 if (ch >= 'a' && ch <= 'z')
335 *dstp++ = *path++; 676 *dstp++ = *path++;
677 else if (ch >= 'A' && ch <= 'Z')
678 *dstp++ = *path++ + ('a' - 'A');
336 else if (ch >= '0' && ch <= '9') 679 else if (ch >= '0' && ch <= '9')
337 { 680 {
338 STRLEN el, nl = 0; 681 STRLEN el, nl = 0;
339 while (*path >= '0' && *path <= '9' && path < pend) 682 while (*path >= '0' && *path <= '9' && path < pend)
340 path++, nl++; 683 path++, nl++;
… …
343 *dstp++ = '0'; 686 *dstp++ = '0';
344 687
345 memcpy (dstp, path - nl, nl); 688 memcpy (dstp, path - nl, nl);
346 dstp += nl; 689 dstp += nl;
347 } 690 }
691 else
692 *dstp++ = *path++;
693#if 0
348 else 694 else
349 { 695 {
350 STRLEN cl; 696 STRLEN cl;
351 to_utf8_fold (path, dstp, &cl); 697 to_utf8_fold (path, dstp, &cl);
352 dstp += cl; 698 dstp += cl;
353 path += is_utf8_char (path); 699 path += is_utf8_char (path);
354 } 700 }
701#endif
355 } 702 }
356 703
357 RETVAL = newSVpvn ((const char *)dst, dstp - dst); 704 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
358} 705}
359 OUTPUT: 706 OUTPUT:
… …
384 } 731 }
385} 732}
386 OUTPUT: 733 OUTPUT:
387 RETVAL 734 RETVAL
388 735
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
389SV * 784SV *
390pb_to_p7 (GdkPixbuf *pb) 785pb_to_hv84 (GdkPixbuf *pb)
391 CODE: 786 CODE:
392{ 787{
393 int w = gdk_pixbuf_get_width (pb); 788 int w = gdk_pixbuf_get_width (pb);
394 int h = gdk_pixbuf_get_height (pb); 789 int h = gdk_pixbuf_get_height (pb);
395 int x, y; 790 int x, y;
396 guchar *dst; 791 guchar *dst;
397 int bpp = gdk_pixbuf_get_n_channels (pb); 792 int bpp = gdk_pixbuf_get_n_channels (pb);
398 guchar *src = gdk_pixbuf_get_pixels (pb); 793 guchar *src = gdk_pixbuf_get_pixels (pb);
399 int sstr = gdk_pixbuf_get_rowstride (pb); 794 int sstr = gdk_pixbuf_get_rowstride (pb);
400 int Er[IW], Eg[IW], Eb[IW];
401 int seed = 77;
402
403 RETVAL = newSV (w * h);
404 SvPOK_only (RETVAL);
405 SvCUR_set (RETVAL, w * h);
406
407 dst = (guchar *)SvPVX (RETVAL);
408
409 memset (Er, 0, sizeof (int) * IW);
410 memset (Eg, 0, sizeof (int) * IW);
411 memset (Eb, 0, sizeof (int) * IW);
412
413 /* some primitive error distribution + random dithering */
414
415 for (y = 0; y < h; y++)
416 {
417 int er = 0, eg = 0, eb = 0;
418
419 for (x = 0; x < w; x++)
420 {
421 int r, g, b;
422 guchar *p = src + x * bpp + y * sstr;
423
424 r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
425 g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
426 b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
427
428 r = r > 7 ? 7 : r < 0 ? 0 : r;
429 g = g > 7 ? 7 : g < 0 ? 0 : g;
430 b = b > 3 ? 3 : b < 0 ? 0 : b;
431
432 er += p[0] - (r * 255 + 4) / 7;
433 eg += p[1] - (g * 255 + 4) / 7;
434 eb += p[2] - (b * 255 + 2) / 3;
435
436 Er[x] = er >> 1; er -= (er + 1) >> 1;
437 Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
438 Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
439
440 *dst++ = r << 5 | g << 2 | b;
441 }
442 }
443}
444 OUTPUT:
445 RETVAL
446
447#############################################################################
448
449MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
450
451void
452dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
453 CODE:
454{
455 int w = gdk_pixbuf_get_width (pb);
456 int h = gdk_pixbuf_get_height (pb);
457 int x, y, i;
458 guchar *dst;
459 int bpp = gdk_pixbuf_get_n_channels (pb);
460 guchar *src = gdk_pixbuf_get_pixels (pb);
461 int sstr = gdk_pixbuf_get_rowstride (pb);
462
463 a85_init ();
464
465 for (y = 0; y < h; y++)
466 for (x = 0; x < w; x++)
467 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
468 a85_push (fp, src [x * bpp + y * sstr + i]);
469
470 a85_finish (fp);
471}
472
473void
474dump_binary (PerlIO *fp, GdkPixbuf *pb)
475 CODE:
476{
477 int w = gdk_pixbuf_get_width (pb);
478 int h = gdk_pixbuf_get_height (pb);
479 int x, y, i;
480 guchar *dst;
481 int bpp = gdk_pixbuf_get_n_channels (pb);
482 guchar *src = gdk_pixbuf_get_pixels (pb);
483 int sstr = gdk_pixbuf_get_rowstride (pb);
484
485 for (y = 0; y < h; y++)
486 for (x = 0; x < w; x++)
487 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
488 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
489}
490
491#############################################################################
492
493MODULE = Gtk2::CV PACKAGE = Gtk2::CV
494
495SV *
496pb_to_hv84 (GdkPixbuf *pb)
497 CODE:
498{
499 int w = gdk_pixbuf_get_width (pb);
500 int h = gdk_pixbuf_get_height (pb);
501 int x, y;
502 guchar *dst;
503 int bpp = gdk_pixbuf_get_n_channels (pb);
504 guchar *src = gdk_pixbuf_get_pixels (pb);
505 int sstr = gdk_pixbuf_get_rowstride (pb);
506 795
507 RETVAL = newSV (6 * 8 * 12 / 8); 796 RETVAL = newSV (6 * 8 * 12 / 8);
508 SvPOK_only (RETVAL); 797 SvPOK_only (RETVAL);
509 SvCUR_set (RETVAL, 6 * 8 * 12 / 8); 798 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
510 799
… …
579############################################################################# 868#############################################################################
580 869
581MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster 870MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
582 871
583SV * 872SV *
584make_histograms (SV *ar) 873extract_features (SV *ar)
585 CODE: 874 CODE:
586{ 875{
587 int i; 876 int i;
588 AV *av, *result; 877 AV *av, *result;
589 878
590 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) 879 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
591 croak ("Not an array ref as first argument to make_histogram"); 880 croak ("Not an array ref as first argument to extract_features");
592 881
593 av = (AV *) SvRV (ar); 882 av = (AV *) SvRV (ar);
594 result = newAV (); 883 result = newAV ();
595 884
596 for (i = 0; i <= av_len (av); ++i) 885 for (i = 0; i <= av_len (av); ++i)
597 { 886 {
598 const int HISTSIZE = 64;
599
600 int j;
601 SV *sv = *av_fetch (av, i, 1); 887 SV *sv = *av_fetch (av, i, 1);
602 STRLEN len;
603 char *buf = SvPVbyte (sv, len);
604
605 int tmphist[HISTSIZE];
606 float *hist;
607
608 SV *histsv = newSV (HISTSIZE * sizeof (float) + 1); 888 SV *histsv = newSV (9 * sizeof (float) + 1);
889
609 SvPOK_on (histsv); 890 SvPOK_on (histsv);
610 SvCUR_set (histsv, HISTSIZE * sizeof (float)); 891 SvCUR_set (histsv, 9 * sizeof (float));
611 hist = (float *)SvPVX (histsv); 892 float *hist = (float *)SvPVX (histsv);
612 893
613 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);
614 898
615 for (j = len; j--; )
616 {
617 unsigned int idx
618 = ((*buf & 0xc0) >> 2)
619 | ((*buf & 0x18) >> 1)
620 | (*buf & 0x03);
621
622 ++tmphist[idx];
623 ++buf;
624 }
625 899 {
626 for (j = 0; j < HISTSIZE; ++j) 900 STRLEN len;
627 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;
628 944
629 av_push (result, histsv); 945 av_push (result, histsv);
630 } 946 }
631 947
632 RETVAL = newRV_noinc ((SV *)result); 948 RETVAL = newRV_noinc ((SV *)result);
633} 949}
634 OUTPUT: 950 OUTPUT:
635 RETVAL 951 RETVAL
636 952
637

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