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Comparing CV/CV.xs (file contents):
Revision 1.6 by root, Wed Nov 12 00:59:01 2003 UTC vs.
Revision 1.16 by root, Wed Jul 20 02:26:46 2005 UTC

… …
9 9
10#define IW 80 10#define IW 80
11 11
12#define RAND (seed = (seed + 7141) * 54773 % 134456) 12#define RAND (seed = (seed + 7141) * 54773 % 134456)
13 13
14#define LINELENGTH 240
15
14#define ELLIPSIS "\xe2\x80\xa6" 16#define ELLIPSIS "\xe2\x80\xa6"
15 17
16static guint32 a85_val; 18static guint32 a85_val;
17static guint a85_cnt; 19static guint a85_cnt;
18static guchar a85_buf[80], *a85_ptr; 20static guchar a85_buf[LINELENGTH], *a85_ptr;
19 21
20static void 22static void
21a85_init (void) 23a85_init (void)
22{ 24{
23 a85_cnt = 4; 25 a85_cnt = 4;
… …
53 } 55 }
54 } 56 }
55 57
56} 58}
57 59
60static void
58a85_finish (PerlIO *fp) 61a85_finish (PerlIO *fp)
59{ 62{
60 while (a85_cnt != 4) 63 while (a85_cnt != 4)
61 a85_push (fp, 0); 64 a85_push (fp, 0);
62 65
… …
65 *a85_ptr++ = '\n'; 68 *a85_ptr++ = '\n';
66 69
67 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); 70 PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
68} 71}
69 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
70///////////////////////////////////////////////////////////////////////////// 100/////////////////////////////////////////////////////////////////////////////
71 101
72MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow 102MODULE = Gtk2::CV PACKAGE = Gtk2::CV
73 103
74PROTOTYPES: ENABLE 104PROTOTYPES: ENABLE
75 105
76GdkPixbuf_noinc * 106GdkPixbuf_noinc *
77transpose (GdkPixbuf *pb) 107transpose (GdkPixbuf *pb)
78 CODE: 108 CODE:
79{ 109{
80 int w = gdk_pixbuf_get_width (pb); 110 int w = gdk_pixbuf_get_width (pb);
81 int h = gdk_pixbuf_get_height (pb); 111 int h = gdk_pixbuf_get_height (pb);
82 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 112 int bpp = gdk_pixbuf_get_n_channels (pb);
83 int x, y, i; 113 int x, y, i;
84 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 114 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
85 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 115 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
86 116
87 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w); 117 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);
… …
101flop (GdkPixbuf *pb) 131flop (GdkPixbuf *pb)
102 CODE: 132 CODE:
103{ 133{
104 int w = gdk_pixbuf_get_width (pb); 134 int w = gdk_pixbuf_get_width (pb);
105 int h = gdk_pixbuf_get_height (pb); 135 int h = gdk_pixbuf_get_height (pb);
106 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 136 int bpp = gdk_pixbuf_get_n_channels (pb);
107 int x, y, i; 137 int x, y, i;
108 guchar *src = gdk_pixbuf_get_pixels (pb), *dst; 138 guchar *src = gdk_pixbuf_get_pixels (pb), *dst;
109 int sstr = gdk_pixbuf_get_rowstride (pb), dstr; 139 int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
110 140
111 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h); 141 RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
… …
156{ 186{
157 int w = gdk_pixbuf_get_width (pb); 187 int w = gdk_pixbuf_get_width (pb);
158 int h = gdk_pixbuf_get_height (pb); 188 int h = gdk_pixbuf_get_height (pb);
159 int x, y; 189 int x, y;
160 guchar *dst; 190 guchar *dst;
161 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 191 int bpp = gdk_pixbuf_get_n_channels (pb);
162 guchar *src = gdk_pixbuf_get_pixels (pb); 192 guchar *src = gdk_pixbuf_get_pixels (pb);
163 int sstr = gdk_pixbuf_get_rowstride (pb); 193 int sstr = gdk_pixbuf_get_rowstride (pb);
164 int Er[IW], Eg[IW], Eb[IW]; 194 int Er[IW], Eg[IW], Eb[IW];
165 int seed = 77; 195 int seed = 77;
166 196
… …
195 225
196 er += p[0] - (r * 255 + 4) / 7; 226 er += p[0] - (r * 255 + 4) / 7;
197 eg += p[1] - (g * 255 + 4) / 7; 227 eg += p[1] - (g * 255 + 4) / 7;
198 eb += p[2] - (b * 255 + 2) / 3; 228 eb += p[2] - (b * 255 + 2) / 3;
199 229
200 Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3; 230 Er[x] = er / 2; er -= er / 2 + RAND % 5 - 2;
201 Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3; 231 Eg[x] = eg / 2; eg -= eg / 2 + RAND % 5 - 2;
202 Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3; 232 Eb[x] = eb / 2; eb -= eb / 2 + RAND % 5 - 2;
203 233
204 *dst++ = r << 5 | g << 2 | b; 234 *dst++ = r << 5 | g << 2 | b;
205 } 235 }
206 } 236 }
207} 237}
208 OUTPUT: 238 OUTPUT:
209 RETVAL 239 RETVAL
210 240
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
296
211############################################################################# 297#############################################################################
212 298
213MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript 299MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
214 300
215void 301void
216dump_pb (PerlIO *fp, GdkPixbuf *pb) 302dump_ascii85 (PerlIO *fp, GdkPixbuf *pb)
217 CODE: 303 CODE:
218{ 304{
219 int w = gdk_pixbuf_get_width (pb); 305 int w = gdk_pixbuf_get_width (pb);
220 int h = gdk_pixbuf_get_height (pb); 306 int h = gdk_pixbuf_get_height (pb);
221 int x, y, i; 307 int x, y, i;
222 guchar *dst; 308 guchar *dst;
223 int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3; 309 int bpp = gdk_pixbuf_get_n_channels (pb);
224 guchar *src = gdk_pixbuf_get_pixels (pb); 310 guchar *src = gdk_pixbuf_get_pixels (pb);
225 int sstr = gdk_pixbuf_get_rowstride (pb); 311 int sstr = gdk_pixbuf_get_rowstride (pb);
226 312
227 a85_init (); 313 a85_init ();
228 314
229 for (y = 0; y < h; y++) 315 for (y = 0; y < h; y++)
230 for (x = 0; x < w; x++) 316 for (x = 0; x < w; x++)
231 for (i = 0; i < 3; i++) 317 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
232 a85_push (fp, src [x * bpp + y * sstr + i]); 318 a85_push (fp, src [x * bpp + y * sstr + i]);
233 319
234 a85_finish (fp); 320 a85_finish (fp);
235} 321}
236 322
323void
324dump_binary (PerlIO *fp, GdkPixbuf *pb)
325 CODE:
326{
327 int w = gdk_pixbuf_get_width (pb);
328 int h = gdk_pixbuf_get_height (pb);
329 int x, y, i;
330 guchar *dst;
331 int bpp = gdk_pixbuf_get_n_channels (pb);
332 guchar *src = gdk_pixbuf_get_pixels (pb);
333 int sstr = gdk_pixbuf_get_rowstride (pb);
237 334
335 for (y = 0; y < h; y++)
336 for (x = 0; x < w; x++)
337 for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
338 PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
339}
238 340
341#############################################################################
239 342
343MODULE = Gtk2::CV PACKAGE = Gtk2::CV
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);
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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