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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 1.12 by root, Tue Feb 8 11:00:11 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)
… …
208 } 236 }
209} 237}
210 OUTPUT: 238 OUTPUT:
211 RETVAL 239 RETVAL
212 240
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 int bigst, j;
257 SV *sv = *av_fetch (av, i, 1);
258 STRLEN len;
259 char *buf = SvPVbyte (sv, len);
260
261 int tmphist[256];
262 char *hist;
263
264 SV *histsv = newSV (257);
265 sv_upgrade (histsv, SVt_PV);
266 SvCUR_set (histsv, 256);
267 hist = SvPVX (histsv);
268
269 Zero (tmphist, 256, int);
270
271 while (len--)
272 ++tmphist[(unsigned char)*buf++];
273
274 bigst = 1;
275 for (j = 0; j < 256; ++j)
276 if (tmphist[j] > bigst)
277 bigst = tmphist[j];
278
279 for (j = 0; j < 256; ++j)
280 hist[j] = tmphist[j] * 255 / bigst;
281
282 av_push (result, histsv);
283 }
284
285 RETVAL = newRV_noinc ((SV *)result);
286}
287 OUTPUT:
288 RETVAL
289
290
291
213############################################################################# 292#############################################################################
214 293
215MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript 294MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
216 295
217void 296void
… …
252 for (x = 0; x < w; x++) 331 for (x = 0; x < w; x++)
253 for (i = 0; i < (bpp < 3 ? 1 : 3); i++) 332 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
254 PerlIO_putc (fp, src [x * bpp + y * sstr + i]); 333 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
255} 334}
256 335
336#############################################################################
257 337
338MODULE = Gtk2::CV PACKAGE = Gtk2::CV
258 339
340SV *
341pb_to_hv84 (GdkPixbuf *pb)
342 CODE:
343{
344 int w = gdk_pixbuf_get_width (pb);
345 int h = gdk_pixbuf_get_height (pb);
346 int x, y;
347 guchar *dst;
348 int bpp = gdk_pixbuf_get_n_channels (pb);
349 guchar *src = gdk_pixbuf_get_pixels (pb);
350 int sstr = gdk_pixbuf_get_rowstride (pb);
259 351
352 RETVAL = newSV (6 * 8 * 12 / 8);
353 SvPOK_only (RETVAL);
354 SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
355
356 dst = SvPVX (RETVAL);
357
358 /* some primitive error distribution + random dithering */
359
360 for (y = 0; y < h; y++)
361 {
362 guchar *p = src + y * sstr;
363
364 for (x = 0; x < w; x += 2)
365 {
366 unsigned int r, g, b, h, s, v, H, V1, V2;
367
368 if (bpp == 3)
369 r = *p++, g = *p++, b = *p++;
370 else if (bpp == 1)
371 r = g = b = *p++;
372 else
373 abort ();
374
375 rgb_to_hsv (r, g, b, &h, &s, &v);
376
377 H = (h * 15 / 255) << 4;
378 V1 = v;
379
380 if (bpp == 3)
381 r = *p++, g = *p++, b = *p++;
382 else if (bpp == 1)
383 r = g = b = *p++;
384 else
385 abort ();
386
387 rgb_to_hsv (r, g, b, &h, &s, &v);
388
389 H |= h * 15 / 255;
390 V2 = v;
391
392 *dst++ = H;
393 *dst++ = V1;
394 *dst++ = V2;
395 }
396 }
397}
398 OUTPUT:
399 RETVAL
400
401SV *
402hv84_to_av (unsigned char *hv84)
403 CODE:
404{
405 int i = 72 / 3;
406 AV *av = newAV ();
407
408 RETVAL = (SV *)newRV_noinc ((SV *)av);
409 while (i--)
410 {
411 int h = *hv84++;
412 int v1 = *hv84++;
413 int v2 = *hv84++;
414
415 av_push (av, newSViv (v1));
416 av_push (av, newSViv ((h >> 4) * 255 / 15));
417 av_push (av, newSViv (v2));
418 av_push (av, newSViv ((h & 15) * 255 / 15));
419 }
420}
421 OUTPUT:
422 RETVAL
423
424
425

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