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/cvs/CV/CV.xs
Revision: 1.29
Committed: Sat Sep 24 01:25:17 2005 UTC (18 years, 7 months ago) by root
Branch: MAIN
CVS Tags: rel-1_1
Changes since 1.28: +17 -0 lines
Log Message:
*** empty log message ***

File Contents

# Content
1 #include "EXTERN.h"
2 #include "perl.h"
3 #include "XSUB.h"
4
5 #include <string.h>
6 #include <setjmp.h>
7
8 #include <jpeglib.h>
9 #include <glib.h>
10 #include <gtk/gtk.h>
11 #include <gdk-pixbuf/gdk-pixbuf.h>
12
13 #include <gperl.h>
14 #include <gtk2perl.h>
15
16 #define IW 80 /* MUST match Schnauer.pm! */
17 #define IH 60 /* MUST match Schnauer.pm! */
18
19 #define RAND (seed = (seed + 7141) * 54773 % 134456)
20
21 #define LINELENGTH 240
22
23 #define ELLIPSIS "\xe2\x80\xa6"
24
25 struct jpg_err_mgr
26 {
27 struct jpeg_error_mgr err;
28 jmp_buf setjmp_buffer;
29 };
30
31 static void
32 cv_error_exit (j_common_ptr cinfo)
33 {
34 longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
35 }
36
37 static void
38 cv_error_output (j_common_ptr cinfo)
39 {
40 return;
41 }
42
43 static void
44 rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
45 unsigned int *h, unsigned int *s, unsigned int *v)
46 {
47 unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
48 unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
49 unsigned int delta = mx - mn;
50
51 *v = mx;
52
53 *s = mx ? delta * 255 / mx : 0;
54
55 if (delta == 0)
56 *h = 0;
57 else
58 {
59 if (r == mx)
60 *h = ((int)g - (int)b) * 255 / (int)(delta * 3);
61 else if (g == mx)
62 *h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52;
63 else if (b == mx)
64 *h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103;
65
66 *h &= 255;
67 }
68 }
69
70 static guint32 a85_val;
71 static guint a85_cnt;
72 static guchar a85_buf[LINELENGTH], *a85_ptr;
73
74 static void
75 a85_init (void)
76 {
77 a85_cnt = 4;
78 a85_ptr = a85_buf;
79 }
80
81 static void
82 a85_push (PerlIO *fp, guchar c)
83 {
84 a85_val = a85_val << 8 | c;
85
86 if (!--a85_cnt)
87 {
88 a85_cnt = 4;
89 if (a85_val)
90 {
91 a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
92 a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
93 a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
94 a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
95 a85_ptr[0] = (a85_val ) + 33;
96
97 a85_ptr += 5;
98 }
99 else
100 *a85_ptr++ = 'z';
101
102 if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7)
103 {
104 *a85_ptr++ = '\n';
105 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
106 a85_ptr = a85_buf;
107 }
108 }
109
110 }
111
112 static void
113 a85_finish (PerlIO *fp)
114 {
115 while (a85_cnt != 4)
116 a85_push (fp, 0);
117
118 *a85_ptr++ = '~'; // probably buggy end-marker
119 *a85_ptr++ = '>'; // probably buggy end-marker
120 *a85_ptr++ = '\n';
121
122 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
123 }
124
125 /////////////////////////////////////////////////////////////////////////////
126
127 MODULE = Gtk2::CV PACKAGE = Gtk2::CV
128
129 PROTOTYPES: ENABLE
130
131 # missing function in perl. really :)
132 int
133 common_prefix_length (a, b)
134 unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg);
135 unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg);
136 CODE:
137 RETVAL = 0;
138
139 while (*a == *b && *a)
140 {
141 RETVAL += (*a & 0xc0) != 0x80;
142 a++, b++;
143 }
144
145 OUTPUT:
146 RETVAL
147
148 # missing in Gtk2 perl module
149
150 gboolean
151 gdk_net_wm_supports (GdkAtom property)
152 CODE:
153 #if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
154 RETVAL = gdk_net_wm_supports (property);
155 #else
156 RETVAL = 0;
157 #endif
158 OUTPUT:
159 RETVAL
160
161 GdkPixbuf_noinc *
162 dealpha_expose (GdkPixbuf *pb)
163 CODE:
164 {
165 int w = gdk_pixbuf_get_width (pb);
166 int h = gdk_pixbuf_get_height (pb);
167 int bpp = gdk_pixbuf_get_n_channels (pb);
168 int x, y, i;
169 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
170 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
171
172 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
173
174 dst = gdk_pixbuf_get_pixels (RETVAL);
175 dstr = gdk_pixbuf_get_rowstride (RETVAL);
176
177 for (x = 0; x < w; x++)
178 for (y = 0; y < h; y++)
179 for (i = 0; i < 3; i++)
180 dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
181 }
182 OUTPUT:
183 RETVAL
184
185 GdkPixbuf_noinc *
186 rotate (GdkPixbuf *pb, int angle)
187 CODE:
188 RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
189 : angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
190 : angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
191 : angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
192 : angle);
193 OUTPUT:
194 RETVAL
195
196 GdkPixbuf_noinc *
197 load_jpeg (SV *path, int thumbnail=0)
198 CODE:
199 {
200 struct jpeg_decompress_struct cinfo;
201 struct jpg_err_mgr jerr;
202 guchar *data;
203 int rs;
204 FILE *fp;
205 volatile GdkPixbuf *pb = 0;
206 gchar *filename;
207
208 RETVAL = 0;
209
210 filename = g_filename_from_utf8 (SvPVutf8_nolen (path), -1, 0, 0, 0);
211 fp = fopen (filename, "rb");
212 g_free (filename);
213
214 if (!fp)
215 XSRETURN_UNDEF;
216
217 cinfo.err = jpeg_std_error (&jerr.err);
218
219 jerr.err.error_exit = cv_error_exit;
220 jerr.err.output_message = cv_error_output;
221
222 if ((rs = setjmp (jerr.setjmp_buffer)))
223 {
224 fclose (fp);
225 jpeg_destroy_decompress (&cinfo);
226
227 if (pb)
228 g_object_unref ((gpointer)pb);
229
230 XSRETURN_UNDEF;
231 }
232
233 jpeg_create_decompress (&cinfo);
234
235 jpeg_stdio_src (&cinfo, fp);
236 jpeg_read_header (&cinfo, TRUE);
237
238 cinfo.dct_method = JDCT_DEFAULT;
239 cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
240 cinfo.do_block_smoothing = FALSE;
241 cinfo.out_color_space = JCS_RGB;
242 cinfo.quantize_colors = FALSE;
243
244 cinfo.scale_num = 1;
245 cinfo.scale_denom = 1;
246
247 jpeg_calc_output_dimensions (&cinfo);
248
249 if (thumbnail)
250 {
251 cinfo.dct_method = JDCT_FASTEST;
252 cinfo.do_fancy_upsampling = FALSE;
253
254 while (cinfo.scale_denom < 8
255 && cinfo.output_width >= IW*4
256 && cinfo.output_height >= IH*4)
257 {
258 cinfo.scale_denom <<= 1;
259 jpeg_calc_output_dimensions (&cinfo);
260 }
261 }
262
263 pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
264 if (!RETVAL)
265 longjmp (jerr.setjmp_buffer, 2);
266
267 data = gdk_pixbuf_get_pixels (RETVAL);
268 rs = gdk_pixbuf_get_rowstride (RETVAL);
269
270 if (cinfo.output_components != 3)
271 longjmp (jerr.setjmp_buffer, 3);
272
273 jpeg_start_decompress (&cinfo);
274
275 while (cinfo.output_scanline < cinfo.output_height)
276 {
277 int remaining = cinfo.output_height - cinfo.output_scanline;
278 JSAMPROW rp[4];
279
280 rp [0] = data + cinfo.output_scanline * rs;
281 rp [1] = (guchar *)rp [0] + rs;
282 rp [2] = (guchar *)rp [1] + rs;
283 rp [3] = (guchar *)rp [2] + rs;
284
285 jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
286 }
287
288 jpeg_finish_decompress (&cinfo);
289 fclose (fp);
290 jpeg_destroy_decompress (&cinfo);
291 }
292 OUTPUT:
293 RETVAL
294
295 #############################################################################
296
297 MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
298
299 SV *
300 foldcase (SV *pathsv)
301 PROTOTYPE: $
302 CODE:
303 {
304 STRLEN plen;
305 U8 *path = (U8 *)SvPVutf8 (pathsv, plen);
306 U8 *pend = path + plen;
307 U8 dst [plen * 6 * 3], *dstp = dst;
308
309 while (path < pend)
310 {
311 U8 ch = *path;
312
313 if (ch >= 'a' && ch <= 'z')
314 *dstp++ = *path++;
315 else if (ch >= '0' && ch <= '9')
316 {
317 STRLEN el, nl = 0;
318 while (*path >= '0' && *path <= '9' && path < pend)
319 path++, nl++;
320
321 for (el = nl; el < 6; el++)
322 *dstp++ = '0';
323
324 memcpy (dstp, path - nl, nl);
325 dstp += nl;
326 }
327 else
328 {
329 STRLEN cl;
330 to_utf8_fold (path, dstp, &cl);
331 dstp += cl;
332 path += is_utf8_char (path);
333 }
334 }
335
336 RETVAL = newSVpvn ((const char *)dst, dstp - dst);
337 }
338 OUTPUT:
339 RETVAL
340
341 GdkPixbuf_noinc *
342 p7_to_pb (int w, int h, SV *src_sv)
343 PROTOTYPE: @
344 CODE:
345 {
346 int x, y;
347 guchar *dst, *d;
348 int dstr;
349 guchar *src = (guchar *)SvPVbyte_nolen (src_sv);
350
351 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
352 dst = gdk_pixbuf_get_pixels (RETVAL);
353 dstr = gdk_pixbuf_get_rowstride (RETVAL);
354
355 for (y = 0; y < h; y++)
356 for (d = dst + y * dstr, x = 0; x < w; x++)
357 {
358 *d++ = (((*src >> 5) & 7) * 255 + 4) / 7;
359 *d++ = (((*src >> 2) & 7) * 255 + 4) / 7;
360 *d++ = (((*src >> 0) & 3) * 255 + 2) / 3;
361
362 src++;
363 }
364 }
365 OUTPUT:
366 RETVAL
367
368 #############################################################################
369
370 MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
371
372 void
373 dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
374 CODE:
375 {
376 int w = gdk_pixbuf_get_width (pb);
377 int h = gdk_pixbuf_get_height (pb);
378 int x, y, i;
379 guchar *dst;
380 int bpp = gdk_pixbuf_get_n_channels (pb);
381 guchar *src = gdk_pixbuf_get_pixels (pb);
382 int sstr = gdk_pixbuf_get_rowstride (pb);
383
384 a85_init ();
385
386 for (y = 0; y < h; y++)
387 for (x = 0; x < w; x++)
388 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
389 a85_push (fp, src [x * bpp + y * sstr + i]);
390
391 a85_finish (fp);
392 }
393
394 void
395 dump_binary (PerlIO *fp, GdkPixbuf *pb)
396 CODE:
397 {
398 int w = gdk_pixbuf_get_width (pb);
399 int h = gdk_pixbuf_get_height (pb);
400 int x, y, i;
401 guchar *dst;
402 int bpp = gdk_pixbuf_get_n_channels (pb);
403 guchar *src = gdk_pixbuf_get_pixels (pb);
404 int sstr = gdk_pixbuf_get_rowstride (pb);
405
406 for (y = 0; y < h; y++)
407 for (x = 0; x < w; x++)
408 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
409 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
410 }
411
412 #############################################################################
413
414 MODULE = Gtk2::CV PACKAGE = Gtk2::CV
415
416 SV *
417 pb_to_hv84 (GdkPixbuf *pb)
418 CODE:
419 {
420 int w = gdk_pixbuf_get_width (pb);
421 int h = gdk_pixbuf_get_height (pb);
422 int x, y;
423 guchar *dst;
424 int bpp = gdk_pixbuf_get_n_channels (pb);
425 guchar *src = gdk_pixbuf_get_pixels (pb);
426 int sstr = gdk_pixbuf_get_rowstride (pb);
427
428 RETVAL = newSV (6 * 8 * 12 / 8);
429 SvPOK_only (RETVAL);
430 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
431
432 dst = (guchar *)SvPVX (RETVAL);
433
434 /* some primitive error distribution + random dithering */
435
436 for (y = 0; y < h; y++)
437 {
438 guchar *p = src + y * sstr;
439
440 for (x = 0; x < w; x += 2)
441 {
442 unsigned int r, g, b, h, s, v, H, V1, V2;
443
444 if (bpp == 3)
445 r = *p++, g = *p++, b = *p++;
446 else if (bpp == 1)
447 r = g = b = *p++;
448 else
449 abort ();
450
451 rgb_to_hsv (r, g, b, &h, &s, &v);
452
453 H = (h * 15 / 255) << 4;
454 V1 = v;
455
456 if (bpp == 3)
457 r = *p++, g = *p++, b = *p++;
458 else if (bpp == 1)
459 r = g = b = *p++;
460 else
461 abort ();
462
463 rgb_to_hsv (r, g, b, &h, &s, &v);
464
465 H |= h * 15 / 255;
466 V2 = v;
467
468 *dst++ = H;
469 *dst++ = V1;
470 *dst++ = V2;
471 }
472 }
473 }
474 OUTPUT:
475 RETVAL
476
477 SV *
478 hv84_to_av (unsigned char *hv84)
479 CODE:
480 {
481 int i = 72 / 3;
482 AV *av = newAV ();
483
484 RETVAL = (SV *)newRV_noinc ((SV *)av);
485 while (i--)
486 {
487 int h = *hv84++;
488 int v1 = *hv84++;
489 int v2 = *hv84++;
490
491 av_push (av, newSViv (v1));
492 av_push (av, newSViv ((h >> 4) * 255 / 15));
493 av_push (av, newSViv (v2));
494 av_push (av, newSViv ((h & 15) * 255 / 15));
495 }
496 }
497 OUTPUT:
498 RETVAL
499
500 #############################################################################
501
502 MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
503
504 SV *
505 make_histograms (SV *ar)
506 CODE:
507 {
508 int i;
509 AV *av, *result;
510
511 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
512 croak ("Not an array ref as first argument to make_histogram");
513
514 av = (AV *) SvRV (ar);
515 result = newAV ();
516
517 for (i = 0; i <= av_len (av); ++i)
518 {
519 const int HISTSIZE = 64;
520
521 int j;
522 SV *sv = *av_fetch (av, i, 1);
523 STRLEN len;
524 char *buf = SvPVbyte (sv, len);
525
526 int tmphist[HISTSIZE];
527 float *hist;
528
529 SV *histsv = newSV (HISTSIZE * sizeof (float) + 1);
530 SvPOK_on (histsv);
531 SvCUR_set (histsv, HISTSIZE * sizeof (float));
532 hist = (float *)SvPVX (histsv);
533
534 Zero (tmphist, sizeof (tmphist), char);
535
536 for (j = len; j--; )
537 {
538 unsigned int idx
539 = ((*buf & 0xc0) >> 2)
540 | ((*buf & 0x18) >> 1)
541 | (*buf & 0x03);
542
543 ++tmphist[idx];
544 ++buf;
545 }
546
547 for (j = 0; j < HISTSIZE; ++j)
548 hist[j] = (float)tmphist[j] / (len + 1e-30);
549
550 av_push (result, histsv);
551 }
552
553 RETVAL = newRV_noinc ((SV *)result);
554 }
555 OUTPUT:
556 RETVAL
557
558