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Comparing CV/CV.xs (file contents):
Revision 1.19 by root, Wed Jul 20 22:33:01 2005 UTC vs.
Revision 1.36 by root, Thu Jun 22 20:50:05 2006 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 <glib.h>
13#include <gtk/gtk.h>
9#include <gdk-pixbuf/gdk-pixbuf.h> 14#include <gdk-pixbuf/gdk-pixbuf.h>
10 15
11#include <gperl.h> 16#include <gperl.h>
12#include <gtk2perl.h> 17#include <gtk2perl.h>
13 18
14#define IW 80 /* MUST match Schnauer.pm! */ 19#define IW 80 /* MUST match Schnauzer.pm! */
15#define IH 60 /* MUST match Schnauer.pm! */ 20#define IH 60 /* MUST match Schnauzer.pm! */
16 21
17#define RAND (seed = (seed + 7141) * 54773 % 134456) 22#define RAND (seed = (seed + 7141) * 54773 % 134456)
18 23
19#define LINELENGTH 240 24#define LINELENGTH 240
20 25
… …
63 68
64 *h &= 255; 69 *h &= 255;
65 } 70 }
66} 71}
67 72
73struct feature {
74 float v1, v2, v3; // mean, square, cube
75 int n;
76};
77
78static void
79feature_init (struct feature *f)
80{
81 f->v1 = 0.;
82 f->v2 = 0.;
83 f->v3 = 0.;
84 f->n = 0;
85}
86
87// didn't find an algorithm to neatly do mean, variance and skew in one pass.
88// elmex ist schuld.
89static void
90feature_update_pass_1 (struct feature *f, unsigned int v)
91{
92 f->v1 += v;
93 f->n += 1;
94}
95
96static void
97feature_finish_pass_1 (struct feature *f)
98{
99 if (f->n < 1)
100 return;
101
102 f->v1 /= f->n;
103}
104
105static void
106feature_update_pass_2 (struct feature *f, unsigned int v)
107{
108 float d = v - f->v1;
109
110 f->v2 += d * d;
111 f->v3 += d * d * d;
112}
113
114static void
115feature_finish_pass_2 (struct feature *f)
116{
117 if (f->n < 1)
118 return;
119
120 f->v2 /= f->n;
121 f->v3 /= f->n;
122
123 // this is a peculiar weightung, but it works fine
124 f->v1 /= 255.;
125 f->v2 /= 128. * 128.;
126 f->v3 /= 128. * 128. * 64.;
127}
128
68static guint32 a85_val; 129static guint32 a85_val;
69static guint a85_cnt; 130static guint a85_cnt;
70static guchar a85_buf[LINELENGTH], *a85_ptr; 131static guchar a85_buf[LINELENGTH], *a85_ptr;
71 132
72static void 133static void
… …
124 185
125MODULE = Gtk2::CV PACKAGE = Gtk2::CV 186MODULE = Gtk2::CV PACKAGE = Gtk2::CV
126 187
127PROTOTYPES: ENABLE 188PROTOTYPES: ENABLE
128 189
190# missing function in perl. really :)
191int
192common_prefix_length (a, b)
193 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
194 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
195 CODE:
196 RETVAL = 0;
197
198 while (*a == *b && *a)
199 {
200 RETVAL += (*a & 0xc0) != 0x80;
201 a++, b++;
202 }
203
204 OUTPUT:
205 RETVAL
206
207const char *
208magic (const char *path)
209 CODE:
210{
211 static magic_t cookie;
212
213 if (!cookie)
214 {
215 cookie = magic_open (MAGIC_NONE);
216
217 if (cookie)
218 magic_load (cookie, 0);
219 else
220 XSRETURN_UNDEF;
221 }
222
223 RETVAL = magic_file (cookie, path);
224}
225 OUTPUT:
226 RETVAL
227
228const char *
229magic_mime (const char *path)
230 CODE:
231{
232 static magic_t cookie;
233
234 if (!cookie)
235 {
236 cookie = magic_open (MAGIC_MIME);
237
238 if (cookie)
239 magic_load (cookie, 0);
240 else
241 XSRETURN_UNDEF;
242 }
243
244 RETVAL = magic_file (cookie, path);
245}
246 OUTPUT:
247 RETVAL
248
249# missing in Gtk2 perl module
250
251gboolean
252gdk_net_wm_supports (GdkAtom property)
253 CODE:
254#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
255 RETVAL = gdk_net_wm_supports (property);
256#else
257 RETVAL = 0;
258#endif
259 OUTPUT:
260 RETVAL
261
129GdkPixbuf_noinc * 262GdkPixbuf_noinc *
130transpose (GdkPixbuf *pb) 263dealpha_expose (GdkPixbuf *pb)
131 CODE: 264 CODE:
132{ 265{
133 int w = gdk_pixbuf_get_width (pb); 266 int w = gdk_pixbuf_get_width (pb);
134 int h = gdk_pixbuf_get_height (pb); 267 int h = gdk_pixbuf_get_height (pb);
135 int bpp = gdk_pixbuf_get_n_channels (pb); 268 int bpp = gdk_pixbuf_get_n_channels (pb);
136 int x, y, i; 269 int x, y, i;
137 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 270 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
138 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 271 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
139 272
140 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); 273 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
141 274
142 dst = gdk_pixbuf_get_pixels (RETVAL); 275 dst = gdk_pixbuf_get_pixels (RETVAL);
143 dstr = gdk_pixbuf_get_rowstride (RETVAL); 276 dstr = gdk_pixbuf_get_rowstride (RETVAL);
144 277
145 for (y = 0; y < h; y++)
146 for (x = 0; x < w; x++) 278 for (x = 0; x < w; x++)
279 for (y = 0; y < h; y++)
147 for (i = 0; i < bpp; i++) 280 for (i = 0; i < 3; i++)
148 dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i]; 281 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
149} 282}
150 OUTPUT: 283 OUTPUT:
151 RETVAL 284 RETVAL
152 285
153GdkPixbuf_noinc * 286GdkPixbuf_noinc *
154flop (GdkPixbuf *pb) 287rotate (GdkPixbuf *pb, int angle)
155 CODE: 288 CODE:
156{ 289 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
157 int w = gdk_pixbuf_get_width (pb); 290 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
158 int h = gdk_pixbuf_get_height (pb); 291 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
159 int bpp = gdk_pixbuf_get_n_channels (pb); 292 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
160 int x, y, i; 293 : angle);
161 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
162 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
163
164 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
165
166 dst = gdk_pixbuf_get_pixels (RETVAL);
167 dstr = gdk_pixbuf_get_rowstride (RETVAL);
168
169 for (y = 0; y < h; y++)
170 for (x = 0; x < w; x++)
171 for (i = 0; i < bpp; i++)
172 dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
173}
174 OUTPUT: 294 OUTPUT:
175 RETVAL 295 RETVAL
176 296
177GdkPixbuf_noinc * 297GdkPixbuf_noinc *
178load_jpeg (char *path, int thumbnail=0) 298load_jpeg (SV *path, int thumbnail=0)
179 CODE: 299 CODE:
180{ 300{
181 struct jpeg_decompress_struct cinfo; 301 struct jpeg_decompress_struct cinfo;
182 struct jpg_err_mgr jerr; 302 struct jpg_err_mgr jerr;
183 guchar *data; 303 guchar *data;
184 int rs; 304 int rs;
185 FILE *fp; 305 FILE *fp;
186 volatile GdkPixbuf *pb = 0; 306 volatile GdkPixbuf *pb = 0;
307
187 RETVAL = 0; 308 RETVAL = 0;
188 309
189 if (!(fp = fopen (path, "rb"))) 310 fp = fopen (SvPVbyte_nolen (path), "rb");
311
312 if (!fp)
190 XSRETURN_UNDEF; 313 XSRETURN_UNDEF;
191 314
192 cinfo.err = jpeg_std_error (&jerr.err); 315 cinfo.err = jpeg_std_error (&jerr.err);
193 316
194 jerr.err.error_exit = cv_error_exit; 317 jerr.err.error_exit = cv_error_exit;
… …
225 { 348 {
226 cinfo.dct_method = JDCT_FASTEST; 349 cinfo.dct_method = JDCT_FASTEST;
227 cinfo.do_fancy_upsampling = FALSE; 350 cinfo.do_fancy_upsampling = FALSE;
228 351
229 while (cinfo.scale_denom < 8 352 while (cinfo.scale_denom < 8
230 && (cinfo.output_width >> 1) >= IW 353 && cinfo.output_width >= IW*4
231 && (cinfo.output_height >> 1) >= IH) 354 && cinfo.output_height >= IH*4)
232 { 355 {
233 cinfo.scale_denom <<= 1; 356 cinfo.scale_denom <<= 1;
234 jpeg_calc_output_dimensions (&cinfo); 357 jpeg_calc_output_dimensions (&cinfo);
235 } 358 }
236 } 359 }
… …
265 jpeg_destroy_decompress (&cinfo); 388 jpeg_destroy_decompress (&cinfo);
266} 389}
267 OUTPUT: 390 OUTPUT:
268 RETVAL 391 RETVAL
269 392
393void
394compare (GdkPixbuf *a, GdkPixbuf *b)
395 PPCODE:
396{
397 int w = gdk_pixbuf_get_width (a);
398 int h = gdk_pixbuf_get_height (a);
399 int sa = gdk_pixbuf_get_rowstride (a);
400 int sb = gdk_pixbuf_get_rowstride (b);
401
402 guchar *pa = gdk_pixbuf_get_pixels (a);
403 guchar *pb = gdk_pixbuf_get_pixels (b);
404
405 int x, y;
406
407 assert (w == gdk_pixbuf_get_width (b));
408 assert (h == gdk_pixbuf_get_height (b));
409
410 assert (gdk_pixbuf_get_n_channels (a) == 3);
411 assert (gdk_pixbuf_get_n_channels (b) == 3);
412
413 double diff = 0.;
414 int peak = 0;
415
416 if (w && h)
417 for (y = 0; y < h; y++)
418 {
419 guchar *pa_ = pa + y * sa;
420 guchar *pb_ = pb + y * sb;
421
422 for (x = 0; x < w; x++)
423 {
424 int d;
425
426 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
427 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
428 d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d));
429 }
430 }
431
432 EXTEND (SP, 2);
433 PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
434 PUSHs (sv_2mortal (newSVnv (peak / 255.)));
435}
436
270############################################################################# 437#############################################################################
271 438
272MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer 439MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
273 440
274SV * 441SV *
275foldcase (SV *pathsv) 442foldcase (SV *pathsv)
276 PROTOTYPE: $ 443 PROTOTYPE: $
277 CODE: 444 CODE:
278{ 445{
279 STRLEN plen; 446 STRLEN plen;
280 U8 *path = SvPVutf8 (pathsv, plen); 447 U8 *path = (U8 *)SvPVutf8 (pathsv, plen);
281 U8 *pend = path + plen; 448 U8 *pend = path + plen;
282 U8 dst [plen * 6 * 3], *dstp = dst; 449 U8 dst [plen * 6 * 3], *dstp = dst;
283 450
284 while (path < pend) 451 while (path < pend)
285 { 452 {
… …
306 dstp += cl; 473 dstp += cl;
307 path += is_utf8_char (path); 474 path += is_utf8_char (path);
308 } 475 }
309 } 476 }
310 477
311 RETVAL = newSVpvn (dst, dstp - dst); 478 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
312} 479}
313 OUTPUT: 480 OUTPUT:
314 RETVAL 481 RETVAL
315 482
316GdkPixbuf_noinc * 483GdkPixbuf_noinc *
317p7_to_pb (int w, int h, guchar *src) 484p7_to_pb (int w, int h, SV *src_sv)
485 PROTOTYPE: @
318 CODE: 486 CODE:
319{ 487{
320 int x, y; 488 int x, y;
321 guchar *dst, *d; 489 guchar *dst, *d;
322 int dstr; 490 int dstr;
491 guchar *src = (guchar *)SvPVbyte_nolen (src_sv);
323 492
324 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); 493 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
325 dst = gdk_pixbuf_get_pixels (RETVAL); 494 dst = gdk_pixbuf_get_pixels (RETVAL);
326 dstr = gdk_pixbuf_get_rowstride (RETVAL); 495 dstr = gdk_pixbuf_get_rowstride (RETVAL);
327 496
… …
336 } 505 }
337} 506}
338 OUTPUT: 507 OUTPUT:
339 RETVAL 508 RETVAL
340 509
510#############################################################################
511
512MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
513
514void
515dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
516 CODE:
517{
518 int w = gdk_pixbuf_get_width (pb);
519 int h = gdk_pixbuf_get_height (pb);
520 int x, y, i;
521 guchar *dst;
522 int bpp = gdk_pixbuf_get_n_channels (pb);
523 guchar *src = gdk_pixbuf_get_pixels (pb);
524 int sstr = gdk_pixbuf_get_rowstride (pb);
525
526 a85_init ();
527
528 for (y = 0; y < h; y++)
529 for (x = 0; x < w; x++)
530 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
531 a85_push (fp, src [x * bpp + y * sstr + i]);
532
533 a85_finish (fp);
534}
535
536void
537dump_binary (PerlIO *fp, GdkPixbuf *pb)
538 CODE:
539{
540 int w = gdk_pixbuf_get_width (pb);
541 int h = gdk_pixbuf_get_height (pb);
542 int x, y, i;
543 guchar *dst;
544 int bpp = gdk_pixbuf_get_n_channels (pb);
545 guchar *src = gdk_pixbuf_get_pixels (pb);
546 int sstr = gdk_pixbuf_get_rowstride (pb);
547
548 for (y = 0; y < h; y++)
549 for (x = 0; x < w; x++)
550 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
551 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
552}
553
554#############################################################################
555
556MODULE = Gtk2::CV PACKAGE = Gtk2::CV
557
341SV * 558SV *
342pb_to_p7 (GdkPixbuf *pb) 559pb_to_hv84 (GdkPixbuf *pb)
343 CODE: 560 CODE:
344{ 561{
345 int w = gdk_pixbuf_get_width (pb); 562 int w = gdk_pixbuf_get_width (pb);
346 int h = gdk_pixbuf_get_height (pb); 563 int h = gdk_pixbuf_get_height (pb);
347 int x, y; 564 int x, y;
348 guchar *dst; 565 guchar *dst;
349 int bpp = gdk_pixbuf_get_n_channels (pb); 566 int bpp = gdk_pixbuf_get_n_channels (pb);
350 guchar *src = gdk_pixbuf_get_pixels (pb); 567 guchar *src = gdk_pixbuf_get_pixels (pb);
351 int sstr = gdk_pixbuf_get_rowstride (pb); 568 int sstr = gdk_pixbuf_get_rowstride (pb);
352 int Er[IW], Eg[IW], Eb[IW];
353 int seed = 77;
354 569
355 RETVAL = newSV (w * h); 570 RETVAL = newSV (6 * 8 * 12 / 8);
356 SvPOK_only (RETVAL); 571 SvPOK_only (RETVAL);
357 SvCUR_set (RETVAL, w * h); 572 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
358 573
359 dst = SvPVX (RETVAL); 574 dst = (guchar *)SvPVX (RETVAL);
360
361 memset (Er, 0, sizeof (int) * IW);
362 memset (Eg, 0, sizeof (int) * IW);
363 memset (Eb, 0, sizeof (int) * IW);
364 575
365 /* some primitive error distribution + random dithering */ 576 /* some primitive error distribution + random dithering */
366 577
367 for (y = 0; y < h; y++) 578 for (y = 0; y < h; y++)
368 { 579 {
369 int er = 0, eg = 0, eb = 0; 580 guchar *p = src + y * sstr;
370 581
371 for (x = 0; x < w; x++) 582 for (x = 0; x < w; x += 2)
372 { 583 {
373 int r, g, b; 584 unsigned int r, g, b, h, s, v, H, V1, V2;
374 guchar *p = src + x * bpp + y * sstr;
375 585
376 r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255; 586 if (bpp == 3)
377 g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255; 587 r = *p++, g = *p++, b = *p++;
378 b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255; 588 else if (bpp == 1)
589 r = g = b = *p++;
590 else
591 abort ();
379 592
380 r = r > 7 ? 7 : r < 0 ? 0 : r; 593 rgb_to_hsv (r, g, b, &h, &s, &v);
381 g = g > 7 ? 7 : g < 0 ? 0 : g;
382 b = b > 3 ? 3 : b < 0 ? 0 : b;
383 594
384 er += p[0] - (r * 255 + 4) / 7; 595 H = (h * 15 / 255) << 4;
385 eg += p[1] - (g * 255 + 4) / 7; 596 V1 = v;
386 eb += p[2] - (b * 255 + 2) / 3;
387 597
388 Er[x] = er >> 1; er -= (er + 1) >> 1; 598 if (bpp == 3)
389 Eg[x] = eg >> 1; eg -= (eg + 1) >> 1; 599 r = *p++, g = *p++, b = *p++;
390 Eb[x] = eb >> 1; eb -= (eb + 1) >> 1; 600 else if (bpp == 1)
601 r = g = b = *p++;
602 else
603 abort ();
391 604
392 *dst++ = r << 5 | g << 2 | b; 605 rgb_to_hsv (r, g, b, &h, &s, &v);
606
607 H |= h * 15 / 255;
608 V2 = v;
609
610 *dst++ = H;
611 *dst++ = V1;
612 *dst++ = V2;
393 } 613 }
394 } 614 }
395} 615}
396 OUTPUT: 616 OUTPUT:
397 RETVAL 617 RETVAL
398 618
399SV * 619SV *
620hv84_to_av (unsigned char *hv84)
621 CODE:
622{
623 int i = 72 / 3;
624 AV *av = newAV ();
625
626 RETVAL = (SV *)newRV_noinc ((SV *)av);
627 while (i--)
628 {
629 int h = *hv84++;
630 int v1 = *hv84++;
631 int v2 = *hv84++;
632
633 av_push (av, newSViv (v1));
634 av_push (av, newSViv ((h >> 4) * 255 / 15));
635 av_push (av, newSViv (v2));
636 av_push (av, newSViv ((h & 15) * 255 / 15));
637 }
638}
639 OUTPUT:
640 RETVAL
641
642#############################################################################
643
644MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
645
646SV *
647extract_features (SV *ar)
648 CODE:
649{
650 int i;
651 AV *av, *result;
652
653 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
654 croak ("Not an array ref as first argument to make_histogram");
655
656 av = (AV *) SvRV (ar);
657 result = newAV ();
658
659 for (i = 0; i <= av_len (av); ++i)
660 {
661 SV *sv = *av_fetch (av, i, 1);
662 SV *histsv = newSV (9 * sizeof (float) + 1);
663
664 SvPOK_on (histsv);
665 SvCUR_set (histsv, 9 * sizeof (float));
666 float *hist = (float *)SvPVX (histsv);
667
668 struct feature f_h, f_s, f_v;
669 feature_init (&f_h);
670 feature_init (&f_s);
671 feature_init (&f_v);
672
673 {
674 STRLEN len;
675 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
676 while (len >= 3)
677 {
678 unsigned int r, g, b, h, s, v;
679 r = *buf++; g = *buf++; b = *buf++;
680 rgb_to_hsv (r, g, b, &h, &s, &v);
681
682 feature_update_pass_1 (&f_h, h);
683 feature_update_pass_1 (&f_s, s);
684 feature_update_pass_1 (&f_v, v);
685
686 len -= 3;
687 }
688
689 feature_finish_pass_1 (&f_h);
690 feature_finish_pass_1 (&f_s);
691 feature_finish_pass_1 (&f_v);
692 }
693
694 {
695 STRLEN len;
696 unsigned char *buf = (unsigned char *)SvPVbyte (sv, len);
697 while (len >= 3)
698 {
699 unsigned int r, g, b, h, s, v;
700 r = *buf++; g = *buf++; b = *buf++;
701 rgb_to_hsv (r, g, b, &h, &s, &v);
702
703 feature_update_pass_2 (&f_h, h);
704 feature_update_pass_2 (&f_s, s);
705 feature_update_pass_2 (&f_v, v);
706
707 len -= 3;
708 }
709
710 feature_finish_pass_2 (&f_h);
711 feature_finish_pass_2 (&f_s);
712 feature_finish_pass_2 (&f_v);
713 }
714
715 hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
716 hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
717 hist [6] = f_v.v1 ; hist [7] = f_v.v2 ; hist [8] = f_v.v3 ;
718
719 av_push (result, histsv);
720 }
721
722 RETVAL = newRV_noinc ((SV *)result);
723}
724 OUTPUT:
725 RETVAL
726
727SV *
400make_histogram (SV *ar) 728make_histograms (SV *ar)
401 CODE: 729 CODE:
402{ 730{
403 int i; 731 int i;
404 AV *av, *result; 732 AV *av, *result;
405 733
… …
448 RETVAL = newRV_noinc ((SV *)result); 776 RETVAL = newRV_noinc ((SV *)result);
449} 777}
450 OUTPUT: 778 OUTPUT:
451 RETVAL 779 RETVAL
452 780
453#############################################################################
454 781
455MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
456
457void
458dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
459 CODE:
460{
461 int w = gdk_pixbuf_get_width (pb);
462 int h = gdk_pixbuf_get_height (pb);
463 int x, y, i;
464 guchar *dst;
465 int bpp = gdk_pixbuf_get_n_channels (pb);
466 guchar *src = gdk_pixbuf_get_pixels (pb);
467 int sstr = gdk_pixbuf_get_rowstride (pb);
468
469 a85_init ();
470
471 for (y = 0; y < h; y++)
472 for (x = 0; x < w; x++)
473 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
474 a85_push (fp, src [x * bpp + y * sstr + i]);
475
476 a85_finish (fp);
477}
478
479void
480dump_binary (PerlIO *fp, GdkPixbuf *pb)
481 CODE:
482{
483 int w = gdk_pixbuf_get_width (pb);
484 int h = gdk_pixbuf_get_height (pb);
485 int x, y, i;
486 guchar *dst;
487 int bpp = gdk_pixbuf_get_n_channels (pb);
488 guchar *src = gdk_pixbuf_get_pixels (pb);
489 int sstr = gdk_pixbuf_get_rowstride (pb);
490
491 for (y = 0; y < h; y++)
492 for (x = 0; x < w; x++)
493 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
494 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
495}
496
497#############################################################################
498
499MODULE = Gtk2::CV PACKAGE = Gtk2::CV
500
501SV *
502pb_to_hv84 (GdkPixbuf *pb)
503 CODE:
504{
505 int w = gdk_pixbuf_get_width (pb);
506 int h = gdk_pixbuf_get_height (pb);
507 int x, y;
508 guchar *dst;
509 int bpp = gdk_pixbuf_get_n_channels (pb);
510 guchar *src = gdk_pixbuf_get_pixels (pb);
511 int sstr = gdk_pixbuf_get_rowstride (pb);
512
513 RETVAL = newSV (6 * 8 * 12 / 8);
514 SvPOK_only (RETVAL);
515 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
516
517 dst = SvPVX (RETVAL);
518
519 /* some primitive error distribution + random dithering */
520
521 for (y = 0; y < h; y++)
522 {
523 guchar *p = src + y * sstr;
524
525 for (x = 0; x < w; x += 2)
526 {
527 unsigned int r, g, b, h, s, v, H, V1, V2;
528
529 if (bpp == 3)
530 r = *p++, g = *p++, b = *p++;
531 else if (bpp == 1)
532 r = g = b = *p++;
533 else
534 abort ();
535
536 rgb_to_hsv (r, g, b, &h, &s, &v);
537
538 H = (h * 15 / 255) << 4;
539 V1 = v;
540
541 if (bpp == 3)
542 r = *p++, g = *p++, b = *p++;
543 else if (bpp == 1)
544 r = g = b = *p++;
545 else
546 abort ();
547
548 rgb_to_hsv (r, g, b, &h, &s, &v);
549
550 H |= h * 15 / 255;
551 V2 = v;
552
553 *dst++ = H;
554 *dst++ = V1;
555 *dst++ = V2;
556 }
557 }
558}
559 OUTPUT:
560 RETVAL
561
562SV *
563hv84_to_av (unsigned char *hv84)
564 CODE:
565{
566 int i = 72 / 3;
567 AV *av = newAV ();
568
569 RETVAL = (SV *)newRV_noinc ((SV *)av);
570 while (i--)
571 {
572 int h = *hv84++;
573 int v1 = *hv84++;
574 int v2 = *hv84++;
575
576 av_push (av, newSViv (v1));
577 av_push (av, newSViv ((h >> 4) * 255 / 15));
578 av_push (av, newSViv (v2));
579 av_push (av, newSViv ((h & 15) * 255 / 15));
580 }
581}
582 OUTPUT:
583 RETVAL
584
585
586

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