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Comparing CV/CV.xs (file contents):
Revision 1.7 by root, Wed Nov 12 23:54:54 2003 UTC vs.
Revision 1.16 by root, Wed Jul 20 02:26:46 2005 UTC

… …
55 } 55 }
56 } 56 }
57 57
58} 58}
59 59
60static void
60a85_finish (PerlIO *fp) 61a85_finish (PerlIO *fp)
61{ 62{
62 while (a85_cnt != 4) 63 while (a85_cnt != 4)
63 a85_push (fp, 0); 64 a85_push (fp, 0);
64 65
… …
67 *a85_ptr++ = '\n'; 68 *a85_ptr++ = '\n';
68 69
69 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); 70 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
70} 71}
71 72
73static void
74rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
75 unsigned int *h, unsigned int *s, unsigned int *v)
76{
77 unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
78 unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
79 unsigned int delta = mx - mn;
80
81 *v = mx;
82
83 *s = mx ? delta * 255 / mx : 0;
84
85 if (delta == 0)
86 *h = 0;
87 else
88 {
89 if (r == mx)
90 *h = ((int)g - (int)b) * 255 / (int)(delta * 3);
91 else if (g == mx)
92 *h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52;
93 else if (b == mx)
94 *h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103;
95
96 *h &= 255;
97 }
98}
99
72///////////////////////////////////////////////////////////////////////////// 100/////////////////////////////////////////////////////////////////////////////
73 101
74MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow 102MODULE = Gtk2::CV PACKAGE = Gtk2::CV
75 103
76PROTOTYPES: ENABLE 104PROTOTYPES: ENABLE
77 105
78GdkPixbuf_noinc * 106GdkPixbuf_noinc *
79transpose (GdkPixbuf *pb) 107transpose (GdkPixbuf *pb)
… …
197 225
198 er += p[0] - (r * 255 + 4) / 7; 226 er += p[0] - (r * 255 + 4) / 7;
199 eg += p[1] - (g * 255 + 4) / 7; 227 eg += p[1] - (g * 255 + 4) / 7;
200 eb += p[2] - (b * 255 + 2) / 3; 228 eb += p[2] - (b * 255 + 2) / 3;
201 229
202 Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3; 230 Er[x] = er / 2; er -= er / 2 + RAND % 5 - 2;
203 Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3; 231 Eg[x] = eg / 2; eg -= eg / 2 + RAND % 5 - 2;
204 Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3; 232 Eb[x] = eb / 2; eb -= eb / 2 + RAND % 5 - 2;
205 233
206 *dst++ = r << 5 | g << 2 | b; 234 *dst++ = r << 5 | g << 2 | b;
207 } 235 }
208 } 236 }
209} 237}
210 OUTPUT: 238 OUTPUT:
211 RETVAL 239 RETVAL
240
241SV *
242make_histogram (SV *ar)
243 CODE:
244{
245 int i;
246 AV *av, *result;
247
248 if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV)
249 croak ("Not an array ref as first argument to make_histogram");
250
251 av = (AV *) SvRV (ar);
252 result = newAV ();
253
254 for (i = 0; i <= av_len (av); ++i)
255 {
256 const int HISTSIZE = 64;
257
258 int j;
259 SV *sv = *av_fetch (av, i, 1);
260 STRLEN len;
261 char *buf = SvPVbyte (sv, len);
262
263 int tmphist[HISTSIZE];
264 float *hist;
265
266 SV *histsv = newSV (HISTSIZE * sizeof (float) + 1);
267 SvPOK_on (histsv);
268 SvCUR_set (histsv, HISTSIZE * sizeof (float));
269 hist = (float *)SvPVX (histsv);
270
271 Zero (tmphist, sizeof (tmphist), char);
272
273 for (j = len; j--; )
274 {
275 unsigned int idx
276 = ((*buf & 0xc0) >> 2)
277 | ((*buf & 0x18) >> 1)
278 | (*buf & 0x03);
279
280 ++tmphist[idx];
281 ++buf;
282 }
283
284 for (j = 0; j < HISTSIZE; ++j)
285 hist[j] = (float)tmphist[j] / (len + 1e-30);
286
287 av_push (result, histsv);
288 }
289
290 RETVAL = newRV_noinc ((SV *)result);
291}
292 OUTPUT:
293 RETVAL
294
295
212 296
213############################################################################# 297#############################################################################
214 298
215MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript 299MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
216 300
… …
252 for (x = 0; x < w; x++) 336 for (x = 0; x < w; x++)
253 for (i = 0; i < (bpp < 3 ? 1 : 3); i++) 337 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
254 PerlIO_putc (fp, src [x * bpp + y * sstr + i]); 338 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
255} 339}
256 340
341#############################################################################
257 342
343MODULE = Gtk2::CV PACKAGE = Gtk2::CV
258 344
345SV *
346pb_to_hv84 (GdkPixbuf *pb)
347 CODE:
348{
349 int w = gdk_pixbuf_get_width (pb);
350 int h = gdk_pixbuf_get_height (pb);
351 int x, y;
352 guchar *dst;
353 int bpp = gdk_pixbuf_get_n_channels (pb);
354 guchar *src = gdk_pixbuf_get_pixels (pb);
355 int sstr = gdk_pixbuf_get_rowstride (pb);
259 356
357 RETVAL = newSV (6 * 8 * 12 / 8);
358 SvPOK_only (RETVAL);
359 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
360
361 dst = SvPVX (RETVAL);
362
363 /* some primitive error distribution + random dithering */
364
365 for (y = 0; y < h; y++)
366 {
367 guchar *p = src + y * sstr;
368
369 for (x = 0; x < w; x += 2)
370 {
371 unsigned int r, g, b, h, s, v, H, V1, V2;
372
373 if (bpp == 3)
374 r = *p++, g = *p++, b = *p++;
375 else if (bpp == 1)
376 r = g = b = *p++;
377 else
378 abort ();
379
380 rgb_to_hsv (r, g, b, &h, &s, &v);
381
382 H = (h * 15 / 255) << 4;
383 V1 = v;
384
385 if (bpp == 3)
386 r = *p++, g = *p++, b = *p++;
387 else if (bpp == 1)
388 r = g = b = *p++;
389 else
390 abort ();
391
392 rgb_to_hsv (r, g, b, &h, &s, &v);
393
394 H |= h * 15 / 255;
395 V2 = v;
396
397 *dst++ = H;
398 *dst++ = V1;
399 *dst++ = V2;
400 }
401 }
402}
403 OUTPUT:
404 RETVAL
405
406SV *
407hv84_to_av (unsigned char *hv84)
408 CODE:
409{
410 int i = 72 / 3;
411 AV *av = newAV ();
412
413 RETVAL = (SV *)newRV_noinc ((SV *)av);
414 while (i--)
415 {
416 int h = *hv84++;
417 int v1 = *hv84++;
418 int v2 = *hv84++;
419
420 av_push (av, newSViv (v1));
421 av_push (av, newSViv ((h >> 4) * 255 / 15));
422 av_push (av, newSViv (v2));
423 av_push (av, newSViv ((h & 15) * 255 / 15));
424 }
425}
426 OUTPUT:
427 RETVAL
428
429
430

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