1 |
#include "EXTERN.h" |
2 |
#include "perl.h" |
3 |
#include "XSUB.h" |
4 |
|
5 |
#include <string.h> |
6 |
#include <setjmp.h> |
7 |
#include <math.h> |
8 |
|
9 |
#include <magic.h> |
10 |
|
11 |
#include <jpeglib.h> |
12 |
#include <glib.h> |
13 |
#include <gtk/gtk.h> |
14 |
#include <gdk/gdkx.h> |
15 |
#include <gdk-pixbuf/gdk-pixbuf.h> |
16 |
|
17 |
#include <gperl.h> |
18 |
#include <gtk2perl.h> |
19 |
|
20 |
#include <assert.h> |
21 |
|
22 |
#if WEBP |
23 |
#include <webp/decode.h> |
24 |
#endif |
25 |
|
26 |
#include "perlmulticore.h" |
27 |
|
28 |
#define IW 80 /* MUST match Schnauzer.pm! */ |
29 |
#define IH 60 /* MUST match Schnauzer.pm! */ |
30 |
|
31 |
#define RAND (seed = (seed + 7141) * 54773 % 134456) |
32 |
|
33 |
#define LINELENGTH 240 |
34 |
|
35 |
#define ELLIPSIS "\xe2\x80\xa6" |
36 |
|
37 |
typedef char *octet_string; |
38 |
|
39 |
struct jpg_err_mgr |
40 |
{ |
41 |
struct jpeg_error_mgr err; |
42 |
jmp_buf setjmp_buffer; |
43 |
}; |
44 |
|
45 |
static void |
46 |
cv_error_exit (j_common_ptr cinfo) |
47 |
{ |
48 |
cinfo->err->output_message (cinfo); |
49 |
longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); |
50 |
} |
51 |
|
52 |
static void |
53 |
cv_error_output (j_common_ptr cinfo) |
54 |
{ |
55 |
char msg[JMSG_LENGTH_MAX]; |
56 |
|
57 |
cinfo->err->format_message (cinfo, msg); |
58 |
|
59 |
fprintf (stderr, "JPEG decoding error: %s\n", msg); |
60 |
return; |
61 |
} |
62 |
|
63 |
static void |
64 |
rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, |
65 |
unsigned int *h, unsigned int *s, unsigned int *v) |
66 |
{ |
67 |
unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b; |
68 |
unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b; |
69 |
unsigned int delta = mx - mn; |
70 |
|
71 |
*v = mx; |
72 |
|
73 |
*s = mx ? delta * 255 / mx : 0; |
74 |
|
75 |
if (delta == 0) |
76 |
*h = 0; |
77 |
else |
78 |
{ |
79 |
if (r == mx) |
80 |
*h = ((int)g - (int)b) * 255 / (int)(delta * 3); |
81 |
else if (g == mx) |
82 |
*h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52; |
83 |
else if (b == mx) |
84 |
*h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103; |
85 |
|
86 |
*h &= 255; |
87 |
} |
88 |
} |
89 |
|
90 |
struct feature { |
91 |
float v1, v2, v3; // mean, square, cube |
92 |
int n; |
93 |
}; |
94 |
|
95 |
static void |
96 |
feature_init (struct feature *f) |
97 |
{ |
98 |
f->v1 = 0.; |
99 |
f->v2 = 0.; |
100 |
f->v3 = 0.; |
101 |
f->n = 0; |
102 |
} |
103 |
|
104 |
// didn't find an algorithm to neatly do mean, variance and skew in one pass. |
105 |
// elmex ist schuld. |
106 |
static void |
107 |
feature_update_pass_1 (struct feature *f, unsigned int v) |
108 |
{ |
109 |
f->v1 += v; |
110 |
f->n += 1; |
111 |
} |
112 |
|
113 |
static void |
114 |
feature_finish_pass_1 (struct feature *f) |
115 |
{ |
116 |
if (f->n < 1) |
117 |
return; |
118 |
|
119 |
f->v1 /= f->n; |
120 |
} |
121 |
|
122 |
static void |
123 |
feature_update_pass_2 (struct feature *f, unsigned int v) |
124 |
{ |
125 |
float d = v - f->v1; |
126 |
|
127 |
f->v2 += d * d; |
128 |
f->v3 += d * d * d; |
129 |
} |
130 |
|
131 |
static void |
132 |
feature_finish_pass_2 (struct feature *f) |
133 |
{ |
134 |
if (f->n < 1) |
135 |
return; |
136 |
|
137 |
f->v2 /= f->n; |
138 |
f->v3 /= f->n; |
139 |
|
140 |
f->v1 /= 255.; |
141 |
f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2); |
142 |
f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.); |
143 |
} |
144 |
|
145 |
static guint32 a85_val; |
146 |
static guint a85_cnt; |
147 |
static guchar a85_buf[LINELENGTH], *a85_ptr; |
148 |
|
149 |
static void |
150 |
a85_init (void) |
151 |
{ |
152 |
a85_cnt = 4; |
153 |
a85_ptr = a85_buf; |
154 |
} |
155 |
|
156 |
static void |
157 |
a85_push (PerlIO *fp, guchar c) |
158 |
{ |
159 |
a85_val = a85_val << 8 | c; |
160 |
|
161 |
if (!--a85_cnt) |
162 |
{ |
163 |
a85_cnt = 4; |
164 |
if (a85_val) |
165 |
{ |
166 |
a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; |
167 |
a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; |
168 |
a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; |
169 |
a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; |
170 |
a85_ptr[0] = (a85_val ) + 33; |
171 |
|
172 |
a85_ptr += 5; |
173 |
} |
174 |
else |
175 |
*a85_ptr++ = 'z'; |
176 |
|
177 |
if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7) |
178 |
{ |
179 |
*a85_ptr++ = '\n'; |
180 |
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
181 |
a85_ptr = a85_buf; |
182 |
} |
183 |
} |
184 |
|
185 |
} |
186 |
|
187 |
static void |
188 |
a85_finish (PerlIO *fp) |
189 |
{ |
190 |
while (a85_cnt != 4) |
191 |
a85_push (fp, 0); |
192 |
|
193 |
*a85_ptr++ = '~'; // probably buggy end-marker |
194 |
*a85_ptr++ = '>'; // probably buggy end-marker |
195 |
*a85_ptr++ = '\n'; |
196 |
|
197 |
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
198 |
} |
199 |
|
200 |
///////////////////////////////////////////////////////////////////////////// |
201 |
|
202 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
203 |
|
204 |
PROTOTYPES: ENABLE |
205 |
|
206 |
# missing function in perl. really :) |
207 |
int |
208 |
common_prefix_length (a, b) |
209 |
unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg); |
210 |
unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg); |
211 |
CODE: |
212 |
RETVAL = 0; |
213 |
|
214 |
while (*a == *b && *a) |
215 |
{ |
216 |
RETVAL += (*a & 0xc0) != 0x80; |
217 |
a++, b++; |
218 |
} |
219 |
|
220 |
OUTPUT: |
221 |
RETVAL |
222 |
|
223 |
const char * |
224 |
magic (octet_string path) |
225 |
CODE: |
226 |
{ |
227 |
static magic_t cookie; |
228 |
|
229 |
if (!cookie) |
230 |
{ |
231 |
cookie = magic_open (MAGIC_SYMLINK); |
232 |
|
233 |
if (cookie) |
234 |
magic_load (cookie, 0); |
235 |
else |
236 |
XSRETURN_UNDEF; |
237 |
} |
238 |
|
239 |
RETVAL = magic_file (cookie, path); |
240 |
} |
241 |
OUTPUT: |
242 |
RETVAL |
243 |
|
244 |
const char * |
245 |
magic_mime (octet_string path) |
246 |
CODE: |
247 |
{ |
248 |
static magic_t cookie; |
249 |
|
250 |
if (!cookie) |
251 |
{ |
252 |
cookie = magic_open (MAGIC_MIME | MAGIC_SYMLINK); |
253 |
|
254 |
if (cookie) |
255 |
magic_load (cookie, 0); |
256 |
else |
257 |
XSRETURN_UNDEF; |
258 |
} |
259 |
|
260 |
perlinterp_release (); |
261 |
RETVAL = magic_file (cookie, path); |
262 |
perlinterp_acquire (); |
263 |
} |
264 |
OUTPUT: |
265 |
RETVAL |
266 |
|
267 |
# missing/broken in Gtk2 perl module |
268 |
|
269 |
void |
270 |
gdk_window_clear_hints (GdkWindow *window) |
271 |
CODE: |
272 |
gdk_window_set_geometry_hints (window, 0, 0); |
273 |
|
274 |
gboolean |
275 |
gdk_net_wm_supports (GdkAtom property) |
276 |
CODE: |
277 |
#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) |
278 |
RETVAL = gdk_net_wm_supports (property); |
279 |
#else |
280 |
RETVAL = 0; |
281 |
#endif |
282 |
OUTPUT: |
283 |
RETVAL |
284 |
|
285 |
GdkPixbuf_noinc * |
286 |
dealpha_expose (GdkPixbuf *pb) |
287 |
CODE: |
288 |
perlinterp_release (); |
289 |
{ |
290 |
int w = gdk_pixbuf_get_width (pb); |
291 |
int h = gdk_pixbuf_get_height (pb); |
292 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
293 |
int x, y, i; |
294 |
guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
295 |
int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
296 |
|
297 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
298 |
|
299 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
300 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
301 |
|
302 |
for (x = 0; x < w; x++) |
303 |
for (y = 0; y < h; y++) |
304 |
for (i = 0; i < 3; i++) |
305 |
dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i]; |
306 |
} |
307 |
perlinterp_acquire (); |
308 |
OUTPUT: |
309 |
RETVAL |
310 |
|
311 |
GdkPixbuf_noinc * |
312 |
rotate (GdkPixbuf *pb, int angle) |
313 |
CODE: |
314 |
perlinterp_release (); |
315 |
if (angle < 0) |
316 |
angle += 360; |
317 |
RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE |
318 |
: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE |
319 |
: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN |
320 |
: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE |
321 |
: angle); |
322 |
perlinterp_acquire (); |
323 |
OUTPUT: |
324 |
RETVAL |
325 |
|
326 |
GdkPixbuf_noinc * |
327 |
load_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0) |
328 |
CODE: |
329 |
{ |
330 |
#if WEBP |
331 |
STRLEN data_size; |
332 |
guchar *data = SvPVbyte (image_data, data_size); |
333 |
int alpha; |
334 |
WebPDecoderConfig config; |
335 |
|
336 |
perlinterp_release (); |
337 |
|
338 |
RETVAL = 0; |
339 |
|
340 |
if (!WebPInitDecoderConfig (&config)) |
341 |
goto err; |
342 |
|
343 |
config.options.use_threads = 1; |
344 |
|
345 |
if (thumbnail) |
346 |
{ |
347 |
config.options.bypass_filtering = 1; |
348 |
config.options.no_fancy_upsampling = 1; |
349 |
|
350 |
config.options.use_scaling = 1; |
351 |
config.options.scaled_width = iw; |
352 |
config.options.scaled_height = ih; |
353 |
} |
354 |
else |
355 |
{ |
356 |
iw = config.input.width; |
357 |
ih = config.input.height; |
358 |
} |
359 |
|
360 |
if (WebPGetFeatures (data, data_size, &config.input) != VP8_STATUS_OK) |
361 |
goto err; |
362 |
|
363 |
alpha = config.input.has_alpha; |
364 |
|
365 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!alpha, 8, iw, ih); |
366 |
if (!RETVAL) |
367 |
goto err; |
368 |
|
369 |
config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB; |
370 |
config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL); |
371 |
config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL); |
372 |
config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL); |
373 |
config.output.is_external_memory = 1; |
374 |
|
375 |
if (WebPDecode (data, data_size, &config) != VP8_STATUS_OK) |
376 |
{ |
377 |
g_object_unref (RETVAL); |
378 |
RETVAL = 0; |
379 |
goto err; |
380 |
} |
381 |
|
382 |
err: |
383 |
perlinterp_acquire (); |
384 |
#else |
385 |
croak ("load_webp: webp not enabled at compile time"); |
386 |
#endif |
387 |
} |
388 |
OUTPUT: |
389 |
RETVAL |
390 |
|
391 |
GdkPixbuf_noinc * |
392 |
load_jpeg (SV *path, int thumbnail = 0, int iw = 0, int ih = 0) |
393 |
CODE: |
394 |
{ |
395 |
struct jpeg_decompress_struct cinfo; |
396 |
struct jpg_err_mgr jerr; |
397 |
guchar *data; |
398 |
int rs; |
399 |
FILE *fp; |
400 |
volatile GdkPixbuf *pb = 0; |
401 |
|
402 |
RETVAL = 0; |
403 |
|
404 |
fp = fopen (SvPVbyte_nolen (path), "rb"); |
405 |
|
406 |
if (!fp) |
407 |
XSRETURN_UNDEF; |
408 |
|
409 |
perlinterp_release (); |
410 |
|
411 |
cinfo.err = jpeg_std_error (&jerr.err); |
412 |
|
413 |
jerr.err.error_exit = cv_error_exit; |
414 |
jerr.err.output_message = cv_error_output; |
415 |
|
416 |
if ((rs = setjmp (jerr.setjmp_buffer))) |
417 |
{ |
418 |
fclose (fp); |
419 |
jpeg_destroy_decompress (&cinfo); |
420 |
|
421 |
if (pb) |
422 |
g_object_unref ((gpointer)pb); |
423 |
|
424 |
perlinterp_acquire (); |
425 |
XSRETURN_UNDEF; |
426 |
} |
427 |
|
428 |
jpeg_create_decompress (&cinfo); |
429 |
|
430 |
jpeg_stdio_src (&cinfo, fp); |
431 |
jpeg_read_header (&cinfo, TRUE); |
432 |
|
433 |
cinfo.dct_method = JDCT_DEFAULT; |
434 |
cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */ |
435 |
cinfo.do_block_smoothing = FALSE; |
436 |
cinfo.out_color_space = JCS_RGB; |
437 |
cinfo.quantize_colors = FALSE; |
438 |
|
439 |
cinfo.scale_num = 1; |
440 |
cinfo.scale_denom = 1; |
441 |
|
442 |
jpeg_calc_output_dimensions (&cinfo); |
443 |
|
444 |
if (thumbnail) |
445 |
{ |
446 |
cinfo.dct_method = JDCT_FASTEST; |
447 |
cinfo.do_fancy_upsampling = FALSE; |
448 |
|
449 |
while (cinfo.scale_denom < 8 |
450 |
&& cinfo.output_width >= iw*4 |
451 |
&& cinfo.output_height >= ih*4) |
452 |
{ |
453 |
cinfo.scale_denom <<= 1; |
454 |
jpeg_calc_output_dimensions (&cinfo); |
455 |
} |
456 |
} |
457 |
|
458 |
if (cinfo.output_components != 3) |
459 |
longjmp (jerr.setjmp_buffer, 3); |
460 |
|
461 |
if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK) |
462 |
{ |
463 |
cinfo.out_color_space = JCS_CMYK; |
464 |
cinfo.output_components = 4; |
465 |
} |
466 |
|
467 |
pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height); |
468 |
if (!RETVAL) |
469 |
longjmp (jerr.setjmp_buffer, 2); |
470 |
|
471 |
data = gdk_pixbuf_get_pixels (RETVAL); |
472 |
rs = gdk_pixbuf_get_rowstride (RETVAL); |
473 |
|
474 |
jpeg_start_decompress (&cinfo); |
475 |
|
476 |
while (cinfo.output_scanline < cinfo.output_height) |
477 |
{ |
478 |
int remaining = cinfo.output_height - cinfo.output_scanline; |
479 |
JSAMPROW rp[4]; |
480 |
|
481 |
rp [0] = data + cinfo.output_scanline * rs; |
482 |
rp [1] = (guchar *)rp [0] + rs; |
483 |
rp [2] = (guchar *)rp [1] + rs; |
484 |
rp [3] = (guchar *)rp [2] + rs; |
485 |
|
486 |
jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); |
487 |
} |
488 |
|
489 |
if (cinfo.out_color_space == JCS_CMYK) |
490 |
{ |
491 |
guchar *end = data + cinfo.output_height * rs; |
492 |
|
493 |
while (data < end) |
494 |
{ |
495 |
U32 c = data [0]; |
496 |
U32 m = data [1]; |
497 |
U32 y = data [2]; |
498 |
U32 k = data [3]; |
499 |
|
500 |
if (0) |
501 |
if (cinfo.Adobe_transform == 2) |
502 |
{ |
503 |
c ^= 0xff; |
504 |
m ^= 0xff; |
505 |
y ^= 0xff; |
506 |
k ^= 0xff; |
507 |
} |
508 |
|
509 |
data [0] = (c * k + 0x80) / 0xff; |
510 |
data [1] = (m * k + 0x80) / 0xff; |
511 |
data [2] = (y * k + 0x80) / 0xff; |
512 |
data [3] = 0xff; |
513 |
|
514 |
data += 4; |
515 |
} |
516 |
} |
517 |
|
518 |
jpeg_finish_decompress (&cinfo); |
519 |
fclose (fp); |
520 |
jpeg_destroy_decompress (&cinfo); |
521 |
perlinterp_acquire (); |
522 |
} |
523 |
OUTPUT: |
524 |
RETVAL |
525 |
|
526 |
void |
527 |
compare (GdkPixbuf *a, GdkPixbuf *b) |
528 |
PPCODE: |
529 |
perlinterp_release (); |
530 |
{ |
531 |
int w = gdk_pixbuf_get_width (a); |
532 |
int h = gdk_pixbuf_get_height (a); |
533 |
|
534 |
int sa = gdk_pixbuf_get_rowstride (a); |
535 |
int sb = gdk_pixbuf_get_rowstride (b); |
536 |
|
537 |
guchar *pa = gdk_pixbuf_get_pixels (a); |
538 |
guchar *pb = gdk_pixbuf_get_pixels (b); |
539 |
|
540 |
int x, y; |
541 |
|
542 |
assert (w == gdk_pixbuf_get_width (b)); |
543 |
assert (h == gdk_pixbuf_get_height (b)); |
544 |
|
545 |
assert (gdk_pixbuf_get_n_channels (a) == 3); |
546 |
assert (gdk_pixbuf_get_n_channels (b) == 3); |
547 |
|
548 |
double diff = 0.; |
549 |
int peak = 0; |
550 |
|
551 |
if (w && h) |
552 |
for (y = 0; y < h; y++) |
553 |
{ |
554 |
guchar *pa_ = pa + y * sa; |
555 |
guchar *pb_ = pb + y * sb; |
556 |
|
557 |
for (x = 0; x < w; x++) |
558 |
{ |
559 |
int d; |
560 |
|
561 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
562 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
563 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
564 |
} |
565 |
} |
566 |
|
567 |
perlinterp_acquire (); |
568 |
|
569 |
EXTEND (SP, 2); |
570 |
PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.))))); |
571 |
PUSHs (sv_2mortal (newSVnv (peak / 255.))); |
572 |
} |
573 |
|
574 |
############################################################################# |
575 |
|
576 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
577 |
|
578 |
# currently only works for filenames (octet strings) |
579 |
|
580 |
SV * |
581 |
foldcase (SV *pathsv) |
582 |
PROTOTYPE: $ |
583 |
CODE: |
584 |
{ |
585 |
STRLEN plen; |
586 |
U8 *path = (U8 *)SvPV (pathsv, plen); |
587 |
U8 *pend = path + plen; |
588 |
U8 dst [plen * 6 * 3], *dstp = dst; |
589 |
|
590 |
while (path < pend) |
591 |
{ |
592 |
U8 ch = *path; |
593 |
|
594 |
if (ch >= 'a' && ch <= 'z') |
595 |
*dstp++ = *path++; |
596 |
else if (ch >= 'A' && ch <= 'Z') |
597 |
*dstp++ = *path++ + ('a' - 'A'); |
598 |
else if (ch >= '0' && ch <= '9') |
599 |
{ |
600 |
STRLEN el, nl = 0; |
601 |
while (*path >= '0' && *path <= '9' && path < pend) |
602 |
path++, nl++; |
603 |
|
604 |
for (el = nl; el < 6; el++) |
605 |
*dstp++ = '0'; |
606 |
|
607 |
memcpy (dstp, path - nl, nl); |
608 |
dstp += nl; |
609 |
} |
610 |
else |
611 |
*dstp++ = *path++; |
612 |
#if 0 |
613 |
else |
614 |
{ |
615 |
STRLEN cl; |
616 |
to_utf8_fold (path, dstp, &cl); |
617 |
dstp += cl; |
618 |
path += is_utf8_char (path); |
619 |
} |
620 |
#endif |
621 |
} |
622 |
|
623 |
RETVAL = newSVpvn ((const char *)dst, dstp - dst); |
624 |
} |
625 |
OUTPUT: |
626 |
RETVAL |
627 |
|
628 |
GdkPixbuf_noinc * |
629 |
p7_to_pb (int w, int h, SV *src_sv) |
630 |
PROTOTYPE: @ |
631 |
CODE: |
632 |
{ |
633 |
int x, y; |
634 |
guchar *dst, *d; |
635 |
int dstr; |
636 |
guchar *src = (guchar *)SvPVbyte_nolen (src_sv); |
637 |
|
638 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
639 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
640 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
641 |
|
642 |
for (y = 0; y < h; y++) |
643 |
for (d = dst + y * dstr, x = 0; x < w; x++) |
644 |
{ |
645 |
*d++ = (((*src >> 5) & 7) * 255 + 4) / 7; |
646 |
*d++ = (((*src >> 2) & 7) * 255 + 4) / 7; |
647 |
*d++ = (((*src >> 0) & 3) * 255 + 2) / 3; |
648 |
|
649 |
src++; |
650 |
} |
651 |
} |
652 |
OUTPUT: |
653 |
RETVAL |
654 |
|
655 |
############################################################################# |
656 |
|
657 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
658 |
|
659 |
void |
660 |
dump_ascii85 (PerlIO *fp, GdkPixbuf *pb) |
661 |
CODE: |
662 |
{ |
663 |
int w = gdk_pixbuf_get_width (pb); |
664 |
int h = gdk_pixbuf_get_height (pb); |
665 |
int x, y, i; |
666 |
guchar *dst; |
667 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
668 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
669 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
670 |
|
671 |
a85_init (); |
672 |
|
673 |
for (y = 0; y < h; y++) |
674 |
for (x = 0; x < w; x++) |
675 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
676 |
a85_push (fp, src [x * bpp + y * sstr + i]); |
677 |
|
678 |
a85_finish (fp); |
679 |
} |
680 |
|
681 |
void |
682 |
dump_binary (PerlIO *fp, GdkPixbuf *pb) |
683 |
CODE: |
684 |
{ |
685 |
int w = gdk_pixbuf_get_width (pb); |
686 |
int h = gdk_pixbuf_get_height (pb); |
687 |
int x, y, i; |
688 |
guchar *dst; |
689 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
690 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
691 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
692 |
|
693 |
for (y = 0; y < h; y++) |
694 |
for (x = 0; x < w; x++) |
695 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
696 |
PerlIO_putc (fp, src [x * bpp + y * sstr + i]); |
697 |
} |
698 |
|
699 |
############################################################################# |
700 |
|
701 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
702 |
|
703 |
SV * |
704 |
pb_to_hv84 (GdkPixbuf *pb) |
705 |
CODE: |
706 |
{ |
707 |
int w = gdk_pixbuf_get_width (pb); |
708 |
int h = gdk_pixbuf_get_height (pb); |
709 |
int x, y; |
710 |
guchar *dst; |
711 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
712 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
713 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
714 |
|
715 |
RETVAL = newSV (6 * 8 * 12 / 8); |
716 |
SvPOK_only (RETVAL); |
717 |
SvCUR_set (RETVAL, 6 * 8 * 12 / 8); |
718 |
|
719 |
dst = (guchar *)SvPVX (RETVAL); |
720 |
|
721 |
/* some primitive error distribution + random dithering */ |
722 |
|
723 |
for (y = 0; y < h; y++) |
724 |
{ |
725 |
guchar *p = src + y * sstr; |
726 |
|
727 |
for (x = 0; x < w; x += 2) |
728 |
{ |
729 |
unsigned int r, g, b, h, s, v, H, V1, V2; |
730 |
|
731 |
if (bpp == 3) |
732 |
r = *p++, g = *p++, b = *p++; |
733 |
else if (bpp == 1) |
734 |
r = g = b = *p++; |
735 |
else |
736 |
abort (); |
737 |
|
738 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
739 |
|
740 |
H = (h * 15 / 255) << 4; |
741 |
V1 = v; |
742 |
|
743 |
if (bpp == 3) |
744 |
r = *p++, g = *p++, b = *p++; |
745 |
else if (bpp == 1) |
746 |
r = g = b = *p++; |
747 |
else |
748 |
abort (); |
749 |
|
750 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
751 |
|
752 |
H |= h * 15 / 255; |
753 |
V2 = v; |
754 |
|
755 |
*dst++ = H; |
756 |
*dst++ = V1; |
757 |
*dst++ = V2; |
758 |
} |
759 |
} |
760 |
} |
761 |
OUTPUT: |
762 |
RETVAL |
763 |
|
764 |
SV * |
765 |
hv84_to_av (unsigned char *hv84) |
766 |
CODE: |
767 |
{ |
768 |
int i = 72 / 3; |
769 |
AV *av = newAV (); |
770 |
|
771 |
RETVAL = (SV *)newRV_noinc ((SV *)av); |
772 |
while (i--) |
773 |
{ |
774 |
int h = *hv84++; |
775 |
int v1 = *hv84++; |
776 |
int v2 = *hv84++; |
777 |
|
778 |
av_push (av, newSViv (v1)); |
779 |
av_push (av, newSViv ((h >> 4) * 255 / 15)); |
780 |
av_push (av, newSViv (v2)); |
781 |
av_push (av, newSViv ((h & 15) * 255 / 15)); |
782 |
} |
783 |
} |
784 |
OUTPUT: |
785 |
RETVAL |
786 |
|
787 |
############################################################################# |
788 |
|
789 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster |
790 |
|
791 |
SV * |
792 |
extract_features (SV *ar) |
793 |
CODE: |
794 |
{ |
795 |
int i; |
796 |
AV *av, *result; |
797 |
|
798 |
if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) |
799 |
croak ("Not an array ref as first argument to extract_features"); |
800 |
|
801 |
av = (AV *) SvRV (ar); |
802 |
result = newAV (); |
803 |
|
804 |
for (i = 0; i <= av_len (av); ++i) |
805 |
{ |
806 |
SV *sv = *av_fetch (av, i, 1); |
807 |
SV *histsv = newSV (9 * sizeof (float) + 1); |
808 |
|
809 |
SvPOK_on (histsv); |
810 |
SvCUR_set (histsv, 9 * sizeof (float)); |
811 |
float *hist = (float *)SvPVX (histsv); |
812 |
|
813 |
struct feature f_h, f_s, f_v; |
814 |
feature_init (&f_h); |
815 |
feature_init (&f_s); |
816 |
feature_init (&f_v); |
817 |
|
818 |
{ |
819 |
STRLEN len; |
820 |
unsigned char *buf = (unsigned char *)SvPVbyte (sv, len); |
821 |
while (len >= 3) |
822 |
{ |
823 |
unsigned int r, g, b, h, s, v; |
824 |
r = *buf++; g = *buf++; b = *buf++; |
825 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
826 |
|
827 |
feature_update_pass_1 (&f_h, h); |
828 |
feature_update_pass_1 (&f_s, s); |
829 |
feature_update_pass_1 (&f_v, v); |
830 |
|
831 |
len -= 3; |
832 |
} |
833 |
|
834 |
feature_finish_pass_1 (&f_h); |
835 |
feature_finish_pass_1 (&f_s); |
836 |
feature_finish_pass_1 (&f_v); |
837 |
} |
838 |
|
839 |
{ |
840 |
STRLEN len; |
841 |
unsigned char *buf = (unsigned char *)SvPVbyte (sv, len); |
842 |
while (len >= 3) |
843 |
{ |
844 |
unsigned int r, g, b, h, s, v; |
845 |
r = *buf++; g = *buf++; b = *buf++; |
846 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
847 |
|
848 |
feature_update_pass_2 (&f_h, h); |
849 |
feature_update_pass_2 (&f_s, s); |
850 |
feature_update_pass_2 (&f_v, v); |
851 |
|
852 |
len -= 3; |
853 |
} |
854 |
|
855 |
feature_finish_pass_2 (&f_h); |
856 |
feature_finish_pass_2 (&f_s); |
857 |
feature_finish_pass_2 (&f_v); |
858 |
} |
859 |
|
860 |
hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.; |
861 |
hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ; |
862 |
hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5; |
863 |
|
864 |
av_push (result, histsv); |
865 |
} |
866 |
|
867 |
RETVAL = newRV_noinc ((SV *)result); |
868 |
} |
869 |
OUTPUT: |
870 |
RETVAL |
871 |
|