| … | |
… | |
| 55 | } |
55 | } |
| 56 | } |
56 | } |
| 57 | |
57 | |
| 58 | } |
58 | } |
| 59 | |
59 | |
|
|
60 | static void |
| 60 | a85_finish (PerlIO *fp) |
61 | a85_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 | |
|
|
73 | static void |
|
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74 | rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, |
|
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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 | |
| 74 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow |
102 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
| 75 | |
103 | |
| 76 | PROTOTYPES: ENABLE |
104 | PROTOTYPES: ENABLE |
| 77 | |
105 | |
| 78 | GdkPixbuf_noinc * |
106 | GdkPixbuf_noinc * |
| 79 | transpose (GdkPixbuf *pb) |
107 | transpose (GdkPixbuf *pb) |
| … | |
… | |
| 208 | } |
236 | } |
| 209 | } |
237 | } |
| 210 | OUTPUT: |
238 | OUTPUT: |
| 211 | RETVAL |
239 | RETVAL |
| 212 | |
240 | |
|
|
241 | SV * |
|
|
242 | make_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 | SvPOK_on (histsv); |
|
|
266 | SvCUR_set (histsv, 256); |
|
|
267 | hist = SvPVX (histsv); |
|
|
268 | |
|
|
269 | Zero (tmphist, 256, int); |
|
|
270 | |
|
|
271 | j = len; |
|
|
272 | |
|
|
273 | while (len--) |
|
|
274 | ++tmphist[(unsigned char)*buf++ & 0xda]; |
|
|
275 | |
|
|
276 | len = j; |
|
|
277 | |
|
|
278 | bigst = 1; |
|
|
279 | for (j = 0; j < 256; ++j) |
|
|
280 | if (tmphist[j] > bigst) |
|
|
281 | bigst = tmphist[j]; |
|
|
282 | |
|
|
283 | for (j = 0; j < 256; ++j) |
|
|
284 | hist[j] = tmphist[j] * 255 / (len == 0 ? 1 : len);//bigst; |
|
|
285 | |
|
|
286 | av_push (result, histsv); |
|
|
287 | } |
|
|
288 | |
|
|
289 | RETVAL = newRV_noinc ((SV *)result); |
|
|
290 | } |
|
|
291 | OUTPUT: |
|
|
292 | RETVAL |
|
|
293 | |
|
|
294 | |
|
|
295 | |
| 213 | ############################################################################# |
296 | ############################################################################# |
| 214 | |
297 | |
| 215 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
298 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
| 216 | |
299 | |
| 217 | void |
300 | void |
| … | |
… | |
| 252 | for (x = 0; x < w; x++) |
335 | for (x = 0; x < w; x++) |
| 253 | for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
336 | for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
| 254 | PerlIO_putc (fp, src [x * bpp + y * sstr + i]); |
337 | PerlIO_putc (fp, src [x * bpp + y * sstr + i]); |
| 255 | } |
338 | } |
| 256 | |
339 | |
|
|
340 | ############################################################################# |
| 257 | |
341 | |
|
|
342 | MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
| 258 | |
343 | |
|
|
344 | SV * |
|
|
345 | pb_to_hv84 (GdkPixbuf *pb) |
|
|
346 | CODE: |
|
|
347 | { |
|
|
348 | int w = gdk_pixbuf_get_width (pb); |
|
|
349 | int h = gdk_pixbuf_get_height (pb); |
|
|
350 | int x, y; |
|
|
351 | guchar *dst; |
|
|
352 | int bpp = gdk_pixbuf_get_n_channels (pb); |
|
|
353 | guchar *src = gdk_pixbuf_get_pixels (pb); |
|
|
354 | int sstr = gdk_pixbuf_get_rowstride (pb); |
| 259 | |
355 | |
|
|
356 | RETVAL = newSV (6 * 8 * 12 / 8); |
|
|
357 | SvPOK_only (RETVAL); |
|
|
358 | SvCUR_set (RETVAL, 6 * 8 * 12 / 8); |
|
|
359 | |
|
|
360 | dst = SvPVX (RETVAL); |
|
|
361 | |
|
|
362 | /* some primitive error distribution + random dithering */ |
|
|
363 | |
|
|
364 | for (y = 0; y < h; y++) |
|
|
365 | { |
|
|
366 | guchar *p = src + y * sstr; |
|
|
367 | |
|
|
368 | for (x = 0; x < w; x += 2) |
|
|
369 | { |
|
|
370 | unsigned int r, g, b, h, s, v, H, V1, V2; |
|
|
371 | |
|
|
372 | if (bpp == 3) |
|
|
373 | r = *p++, g = *p++, b = *p++; |
|
|
374 | else if (bpp == 1) |
|
|
375 | r = g = b = *p++; |
|
|
376 | else |
|
|
377 | abort (); |
|
|
378 | |
|
|
379 | rgb_to_hsv (r, g, b, &h, &s, &v); |
|
|
380 | |
|
|
381 | H = (h * 15 / 255) << 4; |
|
|
382 | V1 = v; |
|
|
383 | |
|
|
384 | if (bpp == 3) |
|
|
385 | r = *p++, g = *p++, b = *p++; |
|
|
386 | else if (bpp == 1) |
|
|
387 | r = g = b = *p++; |
|
|
388 | else |
|
|
389 | abort (); |
|
|
390 | |
|
|
391 | rgb_to_hsv (r, g, b, &h, &s, &v); |
|
|
392 | |
|
|
393 | H |= h * 15 / 255; |
|
|
394 | V2 = v; |
|
|
395 | |
|
|
396 | *dst++ = H; |
|
|
397 | *dst++ = V1; |
|
|
398 | *dst++ = V2; |
|
|
399 | } |
|
|
400 | } |
|
|
401 | } |
|
|
402 | OUTPUT: |
|
|
403 | RETVAL |
|
|
404 | |
|
|
405 | SV * |
|
|
406 | hv84_to_av (unsigned char *hv84) |
|
|
407 | CODE: |
|
|
408 | { |
|
|
409 | int i = 72 / 3; |
|
|
410 | AV *av = newAV (); |
|
|
411 | |
|
|
412 | RETVAL = (SV *)newRV_noinc ((SV *)av); |
|
|
413 | while (i--) |
|
|
414 | { |
|
|
415 | int h = *hv84++; |
|
|
416 | int v1 = *hv84++; |
|
|
417 | int v2 = *hv84++; |
|
|
418 | |
|
|
419 | av_push (av, newSViv (v1)); |
|
|
420 | av_push (av, newSViv ((h >> 4) * 255 / 15)); |
|
|
421 | av_push (av, newSViv (v2)); |
|
|
422 | av_push (av, newSViv ((h & 15) * 255 / 15)); |
|
|
423 | } |
|
|
424 | } |
|
|
425 | OUTPUT: |
|
|
426 | RETVAL |
|
|
427 | |
|
|
428 | |
|
|
429 | |
