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 <jerror.h> |
13 |
|
14 |
#include <glib.h> |
15 |
#include <gtk/gtk.h> |
16 |
#include <gdk/gdkx.h> |
17 |
#include <gdk-pixbuf/gdk-pixbuf.h> |
18 |
|
19 |
#include <gperl.h> |
20 |
#include <gtk2perl.h> |
21 |
|
22 |
#include <assert.h> |
23 |
|
24 |
#if WEBP |
25 |
#include <webp/demux.h> |
26 |
#include <webp/decode.h> |
27 |
#endif |
28 |
|
29 |
#include "perlmulticore.h" |
30 |
|
31 |
#define IW 80 /* MUST match Schnauzer.pm! */ |
32 |
#define IH 60 /* MUST match Schnauzer.pm! */ |
33 |
|
34 |
#define RAND (seed = (seed + 7141) * 54773 % 134456) |
35 |
|
36 |
#define LINELENGTH 240 |
37 |
|
38 |
#define ELLIPSIS "\xe2\x80\xa6" |
39 |
|
40 |
typedef char *octet_string; |
41 |
|
42 |
static magic_t magic_cookie[2]; /* !mime, mime */ |
43 |
|
44 |
struct jpg_err_mgr |
45 |
{ |
46 |
struct jpeg_error_mgr err; |
47 |
jmp_buf setjmp_buffer; |
48 |
}; |
49 |
|
50 |
static void |
51 |
cv_error_exit (j_common_ptr cinfo) |
52 |
{ |
53 |
cinfo->err->output_message (cinfo); |
54 |
longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); |
55 |
} |
56 |
|
57 |
static void |
58 |
cv_error_output (j_common_ptr cinfo) |
59 |
{ |
60 |
char msg[JMSG_LENGTH_MAX]; |
61 |
|
62 |
cinfo->err->format_message (cinfo, msg); |
63 |
|
64 |
fprintf (stderr, "JPEG decoding error: %s\n", msg); |
65 |
return; |
66 |
} |
67 |
|
68 |
static void |
69 |
rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, |
70 |
unsigned int *h, unsigned int *s, unsigned int *v) |
71 |
{ |
72 |
unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b; |
73 |
unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b; |
74 |
unsigned int delta = mx - mn; |
75 |
|
76 |
*v = mx; |
77 |
|
78 |
*s = mx ? delta * 255 / mx : 0; |
79 |
|
80 |
if (delta == 0) |
81 |
*h = 0; |
82 |
else |
83 |
{ |
84 |
if (r == mx) |
85 |
*h = ((int)g - (int)b) * 255 / (int)(delta * 3); |
86 |
else if (g == mx) |
87 |
*h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52; |
88 |
else if (b == mx) |
89 |
*h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103; |
90 |
|
91 |
*h &= 255; |
92 |
} |
93 |
} |
94 |
|
95 |
struct feature { |
96 |
float v1, v2, v3; // mean, square, cube |
97 |
int n; |
98 |
}; |
99 |
|
100 |
static void |
101 |
feature_init (struct feature *f) |
102 |
{ |
103 |
f->v1 = 0.; |
104 |
f->v2 = 0.; |
105 |
f->v3 = 0.; |
106 |
f->n = 0; |
107 |
} |
108 |
|
109 |
// didn't find an algorithm to neatly do mean, variance and skew in one pass. |
110 |
// elmex ist schuld. |
111 |
static void |
112 |
feature_update_pass_1 (struct feature *f, unsigned int v) |
113 |
{ |
114 |
f->v1 += v; |
115 |
f->n += 1; |
116 |
} |
117 |
|
118 |
static void |
119 |
feature_finish_pass_1 (struct feature *f) |
120 |
{ |
121 |
if (f->n < 1) |
122 |
return; |
123 |
|
124 |
f->v1 /= f->n; |
125 |
} |
126 |
|
127 |
static void |
128 |
feature_update_pass_2 (struct feature *f, unsigned int v) |
129 |
{ |
130 |
float d = v - f->v1; |
131 |
|
132 |
f->v2 += d * d; |
133 |
f->v3 += d * d * d; |
134 |
} |
135 |
|
136 |
static void |
137 |
feature_finish_pass_2 (struct feature *f) |
138 |
{ |
139 |
if (f->n < 1) |
140 |
return; |
141 |
|
142 |
f->v2 /= f->n; |
143 |
f->v3 /= f->n; |
144 |
|
145 |
f->v1 /= 255.; |
146 |
f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2); |
147 |
f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.); |
148 |
} |
149 |
|
150 |
static guint32 a85_val; |
151 |
static guint a85_cnt; |
152 |
static guchar a85_buf[LINELENGTH], *a85_ptr; |
153 |
|
154 |
static void |
155 |
a85_init (void) |
156 |
{ |
157 |
a85_cnt = 4; |
158 |
a85_ptr = a85_buf; |
159 |
} |
160 |
|
161 |
static void |
162 |
a85_push (PerlIO *fp, guchar c) |
163 |
{ |
164 |
a85_val = a85_val << 8 | c; |
165 |
|
166 |
if (!--a85_cnt) |
167 |
{ |
168 |
a85_cnt = 4; |
169 |
if (a85_val) |
170 |
{ |
171 |
a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; |
172 |
a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; |
173 |
a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; |
174 |
a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; |
175 |
a85_ptr[0] = (a85_val ) + 33; |
176 |
|
177 |
a85_ptr += 5; |
178 |
} |
179 |
else |
180 |
*a85_ptr++ = 'z'; |
181 |
|
182 |
if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7) |
183 |
{ |
184 |
*a85_ptr++ = '\n'; |
185 |
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
186 |
a85_ptr = a85_buf; |
187 |
} |
188 |
} |
189 |
|
190 |
} |
191 |
|
192 |
static void |
193 |
a85_finish (PerlIO *fp) |
194 |
{ |
195 |
while (a85_cnt != 4) |
196 |
a85_push (fp, 0); |
197 |
|
198 |
*a85_ptr++ = '~'; // probably buggy end-marker |
199 |
*a85_ptr++ = '>'; // probably buggy end-marker |
200 |
*a85_ptr++ = '\n'; |
201 |
|
202 |
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
203 |
} |
204 |
|
205 |
///////////////////////////////////////////////////////////////////////////// |
206 |
// memory source for libjpeg |
207 |
|
208 |
static void cv_ms_init (j_decompress_ptr cinfo) |
209 |
{ |
210 |
} |
211 |
|
212 |
static void cv_ms_term (j_decompress_ptr cinfo) |
213 |
{ |
214 |
} |
215 |
|
216 |
static boolean cv_ms_fill (j_decompress_ptr cinfo) |
217 |
{ |
218 |
ERREXIT (cinfo, JERR_INPUT_EMPTY); |
219 |
|
220 |
return TRUE; |
221 |
} |
222 |
|
223 |
static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes) |
224 |
{ |
225 |
if (num_bytes > 0) |
226 |
{ |
227 |
struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src; |
228 |
|
229 |
src->next_input_byte += num_bytes; |
230 |
src->bytes_in_buffer -= num_bytes; |
231 |
} |
232 |
} |
233 |
|
234 |
static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen) |
235 |
{ |
236 |
struct jpeg_source_mgr *src; |
237 |
|
238 |
if (!cinfo->src) |
239 |
cinfo->src = (struct jpeg_source_mgr *) |
240 |
(*cinfo->mem->alloc_small) ( |
241 |
(j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr) |
242 |
); |
243 |
|
244 |
src = (struct jpeg_source_mgr *)cinfo->src; |
245 |
src->init_source = cv_ms_init; |
246 |
src->fill_input_buffer = cv_ms_fill; |
247 |
src->skip_input_data = cv_ms_skip; |
248 |
src->resync_to_restart = jpeg_resync_to_restart; |
249 |
src->term_source = cv_ms_term; |
250 |
src->next_input_byte = (JOCTET *)buf; |
251 |
src->bytes_in_buffer = buflen; |
252 |
} |
253 |
|
254 |
///////////////////////////////////////////////////////////////////////////// |
255 |
|
256 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
257 |
|
258 |
PROTOTYPES: ENABLE |
259 |
|
260 |
# calculate the common prefix length of two strings |
261 |
# missing function in perl. really :) |
262 |
int |
263 |
common_prefix_length (a, b) |
264 |
unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg); |
265 |
unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg); |
266 |
CODE: |
267 |
RETVAL = 0; |
268 |
|
269 |
while (*a == *b && *a) |
270 |
{ |
271 |
RETVAL += (*a & 0xc0) != 0x80; |
272 |
a++, b++; |
273 |
} |
274 |
|
275 |
OUTPUT: |
276 |
RETVAL |
277 |
|
278 |
const char * |
279 |
magic (SV *path_or_data) |
280 |
ALIAS: |
281 |
magic = 0 |
282 |
magic_mime = 1 |
283 |
magic_buffer = 2 |
284 |
magic_buffer_mime = 3 |
285 |
CODE: |
286 |
{ |
287 |
STRLEN len; |
288 |
char *data = SvPVbyte (path_or_data, len); |
289 |
|
290 |
if (!magic_cookie[0]) |
291 |
{ |
292 |
magic_cookie[0] = magic_open (MAGIC_SYMLINK); |
293 |
magic_cookie[1] = magic_open (MAGIC_SYMLINK | MAGIC_MIME_TYPE); |
294 |
magic_load (magic_cookie[0], 0); |
295 |
magic_load (magic_cookie[1], 0); |
296 |
} |
297 |
|
298 |
perlinterp_release (); |
299 |
|
300 |
RETVAL = ix & 2 |
301 |
? magic_buffer (magic_cookie[ix & 1], data, len) |
302 |
: magic_file (magic_cookie[ix & 1], data); |
303 |
|
304 |
perlinterp_acquire (); |
305 |
} |
306 |
OUTPUT: |
307 |
RETVAL |
308 |
|
309 |
# missing/broken in Gtk2 perl module |
310 |
|
311 |
void |
312 |
gdk_window_clear_hints (GdkWindow *window) |
313 |
CODE: |
314 |
gdk_window_set_geometry_hints (window, 0, 0); |
315 |
|
316 |
gboolean |
317 |
gdk_net_wm_supports (GdkAtom property) |
318 |
CODE: |
319 |
#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) |
320 |
RETVAL = gdk_net_wm_supports (property); |
321 |
#else |
322 |
RETVAL = 0; |
323 |
#endif |
324 |
OUTPUT: |
325 |
RETVAL |
326 |
|
327 |
GdkPixbuf_noinc * |
328 |
dealpha_expose (GdkPixbuf *pb) |
329 |
CODE: |
330 |
perlinterp_release (); |
331 |
{ |
332 |
int w = gdk_pixbuf_get_width (pb); |
333 |
int h = gdk_pixbuf_get_height (pb); |
334 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
335 |
int x, y, i; |
336 |
guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
337 |
int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
338 |
|
339 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
340 |
|
341 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
342 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
343 |
|
344 |
for (x = 0; x < w; x++) |
345 |
for (y = 0; y < h; y++) |
346 |
for (i = 0; i < 3; i++) |
347 |
dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i]; |
348 |
} |
349 |
perlinterp_acquire (); |
350 |
OUTPUT: |
351 |
RETVAL |
352 |
|
353 |
GdkPixbuf_noinc * |
354 |
rotate (GdkPixbuf *pb, int angle) |
355 |
CODE: |
356 |
perlinterp_release (); |
357 |
if (angle < 0) |
358 |
angle += 360; |
359 |
RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE |
360 |
: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE |
361 |
: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN |
362 |
: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE |
363 |
: angle); |
364 |
perlinterp_acquire (); |
365 |
OUTPUT: |
366 |
RETVAL |
367 |
|
368 |
const char * |
369 |
filetype (SV *image_data) |
370 |
CODE: |
371 |
{ |
372 |
STRLEN data_len; |
373 |
U8 *data = SvPVbyte (image_data, data_len); |
374 |
|
375 |
if (data_len >= 20 |
376 |
&& data[0] == 0xff |
377 |
&& data[1] == 0xd8 |
378 |
&& data[2] == 0xff) |
379 |
RETVAL = "jpg"; |
380 |
else if (data_len >= 12 |
381 |
&& data[ 0] == (U8)'R' |
382 |
&& data[ 1] == (U8)'I' |
383 |
&& data[ 2] == (U8)'F' |
384 |
&& data[ 3] == (U8)'F' |
385 |
&& data[ 8] == (U8)'W' |
386 |
&& data[ 9] == (U8)'E' |
387 |
&& data[10] == (U8)'B' |
388 |
&& data[11] == (U8)'P') |
389 |
RETVAL = "webp"; |
390 |
else if (data_len >= 16 |
391 |
&& data[ 0] == 0x89 |
392 |
&& data[ 1] == (U8)'P' |
393 |
&& data[ 2] == (U8)'N' |
394 |
&& data[ 3] == (U8)'G' |
395 |
&& data[ 4] == 0x0d |
396 |
&& data[ 5] == 0x0a |
397 |
&& data[ 6] == 0x1a |
398 |
&& data[ 7] == 0x0a) |
399 |
RETVAL = "png"; |
400 |
else |
401 |
RETVAL = "other"; |
402 |
} |
403 |
OUTPUT: |
404 |
RETVAL |
405 |
|
406 |
GdkPixbuf_noinc * |
407 |
decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0) |
408 |
CODE: |
409 |
{ |
410 |
#if WEBP |
411 |
STRLEN data_size; |
412 |
int alpha; |
413 |
WebPData data; |
414 |
WebPDemuxer *demux; |
415 |
WebPIterator iter; |
416 |
WebPDecoderConfig config; |
417 |
int inw, inh; |
418 |
|
419 |
data.bytes = (uint8_t *)SvPVbyte (image_data, data_size); |
420 |
data.size = data_size; |
421 |
|
422 |
perlinterp_release (); |
423 |
|
424 |
RETVAL = 0; |
425 |
|
426 |
if (!(demux = WebPDemux (&data))) |
427 |
goto err_demux; |
428 |
|
429 |
if (!WebPDemuxGetFrame (demux, 1, &iter)) |
430 |
goto err_iter; |
431 |
|
432 |
if (!WebPInitDecoderConfig (&config)) |
433 |
goto err_iter; |
434 |
|
435 |
config.options.use_threads = 1; |
436 |
|
437 |
if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK) |
438 |
goto err_iter; |
439 |
|
440 |
inw = config.input.width; |
441 |
inh = config.input.height; |
442 |
|
443 |
if (thumbnail) |
444 |
{ |
445 |
if (inw * ih > inh * iw) |
446 |
ih = (iw * inh + inw - 1) / inw; |
447 |
else |
448 |
iw = (ih * inw + inh - 1) / inh; |
449 |
|
450 |
config.options.bypass_filtering = 1; |
451 |
config.options.no_fancy_upsampling = 1; |
452 |
|
453 |
config.options.use_scaling = 1; |
454 |
config.options.scaled_width = iw; |
455 |
config.options.scaled_height = ih; |
456 |
} |
457 |
else |
458 |
{ |
459 |
iw = inw; |
460 |
ih = inh; |
461 |
} |
462 |
|
463 |
alpha = !!config.input.has_alpha; |
464 |
|
465 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih); |
466 |
if (!RETVAL) |
467 |
goto err_iter; |
468 |
|
469 |
config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB; |
470 |
config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL); |
471 |
config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL); |
472 |
config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL); |
473 |
config.output.is_external_memory = 1; |
474 |
|
475 |
if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK) |
476 |
{ |
477 |
g_object_unref (RETVAL); |
478 |
RETVAL = 0; |
479 |
goto err_iter; |
480 |
} |
481 |
|
482 |
err_iter: |
483 |
WebPDemuxReleaseIterator (&iter); |
484 |
err_demux: |
485 |
WebPDemuxDelete (demux); |
486 |
|
487 |
perlinterp_acquire (); |
488 |
#else |
489 |
croak ("load_webp: webp not enabled at compile time"); |
490 |
#endif |
491 |
} |
492 |
OUTPUT: |
493 |
RETVAL |
494 |
|
495 |
GdkPixbuf_noinc * |
496 |
decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0) |
497 |
CODE: |
498 |
{ |
499 |
struct jpeg_decompress_struct cinfo; |
500 |
struct jpg_err_mgr jerr; |
501 |
int rs; |
502 |
volatile GdkPixbuf *pb = 0; |
503 |
STRLEN data_len; |
504 |
guchar *data = SvPVbyte (image_data, data_len); |
505 |
|
506 |
RETVAL = 0; |
507 |
|
508 |
perlinterp_release (); |
509 |
|
510 |
cinfo.err = jpeg_std_error (&jerr.err); |
511 |
|
512 |
jerr.err.error_exit = cv_error_exit; |
513 |
jerr.err.output_message = cv_error_output; |
514 |
|
515 |
if ((rs = setjmp (jerr.setjmp_buffer))) |
516 |
{ |
517 |
jpeg_destroy_decompress (&cinfo); |
518 |
|
519 |
if (pb) |
520 |
g_object_unref ((gpointer)pb); |
521 |
|
522 |
perlinterp_acquire (); |
523 |
XSRETURN_UNDEF; |
524 |
} |
525 |
|
526 |
jpeg_create_decompress (&cinfo); |
527 |
cv_jpeg_mem_src (&cinfo, data, data_len); |
528 |
|
529 |
jpeg_read_header (&cinfo, TRUE); |
530 |
|
531 |
cinfo.dct_method = JDCT_DEFAULT; |
532 |
cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */ |
533 |
cinfo.do_block_smoothing = FALSE; |
534 |
cinfo.out_color_space = JCS_RGB; |
535 |
cinfo.quantize_colors = FALSE; |
536 |
|
537 |
cinfo.scale_num = 1; |
538 |
cinfo.scale_denom = 1; |
539 |
|
540 |
jpeg_calc_output_dimensions (&cinfo); |
541 |
|
542 |
if (thumbnail) |
543 |
{ |
544 |
cinfo.dct_method = JDCT_FASTEST; |
545 |
cinfo.do_fancy_upsampling = FALSE; |
546 |
|
547 |
while (cinfo.scale_denom < 8 |
548 |
&& cinfo.output_width >= iw*4 |
549 |
&& cinfo.output_height >= ih*4) |
550 |
{ |
551 |
cinfo.scale_denom <<= 1; |
552 |
jpeg_calc_output_dimensions (&cinfo); |
553 |
} |
554 |
} |
555 |
|
556 |
if (cinfo.output_components != 3) |
557 |
longjmp (jerr.setjmp_buffer, 3); |
558 |
|
559 |
if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK) |
560 |
{ |
561 |
cinfo.out_color_space = JCS_CMYK; |
562 |
cinfo.output_components = 4; |
563 |
} |
564 |
|
565 |
pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height); |
566 |
if (!RETVAL) |
567 |
longjmp (jerr.setjmp_buffer, 2); |
568 |
|
569 |
data = gdk_pixbuf_get_pixels (RETVAL); |
570 |
rs = gdk_pixbuf_get_rowstride (RETVAL); |
571 |
|
572 |
jpeg_start_decompress (&cinfo); |
573 |
|
574 |
while (cinfo.output_scanline < cinfo.output_height) |
575 |
{ |
576 |
int remaining = cinfo.output_height - cinfo.output_scanline; |
577 |
JSAMPROW rp[4]; |
578 |
|
579 |
rp [0] = data + cinfo.output_scanline * rs; |
580 |
rp [1] = (guchar *)rp [0] + rs; |
581 |
rp [2] = (guchar *)rp [1] + rs; |
582 |
rp [3] = (guchar *)rp [2] + rs; |
583 |
|
584 |
jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); |
585 |
} |
586 |
|
587 |
if (cinfo.out_color_space == JCS_CMYK) |
588 |
{ |
589 |
guchar *end = data + cinfo.output_height * rs; |
590 |
|
591 |
while (data < end) |
592 |
{ |
593 |
U32 c = data [0]; |
594 |
U32 m = data [1]; |
595 |
U32 y = data [2]; |
596 |
U32 k = data [3]; |
597 |
|
598 |
if (0) |
599 |
if (cinfo.Adobe_transform == 2) |
600 |
{ |
601 |
c ^= 0xff; |
602 |
m ^= 0xff; |
603 |
y ^= 0xff; |
604 |
k ^= 0xff; |
605 |
} |
606 |
|
607 |
data [0] = (c * k + 0x80) / 0xff; |
608 |
data [1] = (m * k + 0x80) / 0xff; |
609 |
data [2] = (y * k + 0x80) / 0xff; |
610 |
data [3] = 0xff; |
611 |
|
612 |
data += 4; |
613 |
} |
614 |
} |
615 |
|
616 |
jpeg_finish_decompress (&cinfo); |
617 |
jpeg_destroy_decompress (&cinfo); |
618 |
perlinterp_acquire (); |
619 |
} |
620 |
OUTPUT: |
621 |
RETVAL |
622 |
|
623 |
void |
624 |
compare (GdkPixbuf *a, GdkPixbuf *b) |
625 |
PPCODE: |
626 |
perlinterp_release (); |
627 |
{ |
628 |
int w = gdk_pixbuf_get_width (a); |
629 |
int h = gdk_pixbuf_get_height (a); |
630 |
|
631 |
int sa = gdk_pixbuf_get_rowstride (a); |
632 |
int sb = gdk_pixbuf_get_rowstride (b); |
633 |
|
634 |
guchar *pa = gdk_pixbuf_get_pixels (a); |
635 |
guchar *pb = gdk_pixbuf_get_pixels (b); |
636 |
|
637 |
int x, y; |
638 |
|
639 |
assert (w == gdk_pixbuf_get_width (b)); |
640 |
assert (h == gdk_pixbuf_get_height (b)); |
641 |
|
642 |
assert (gdk_pixbuf_get_n_channels (a) == 3); |
643 |
assert (gdk_pixbuf_get_n_channels (b) == 3); |
644 |
|
645 |
double diff = 0.; |
646 |
int peak = 0; |
647 |
|
648 |
if (w && h) |
649 |
for (y = 0; y < h; y++) |
650 |
{ |
651 |
guchar *pa_ = pa + y * sa; |
652 |
guchar *pb_ = pb + y * sb; |
653 |
|
654 |
for (x = 0; x < w; x++) |
655 |
{ |
656 |
int d; |
657 |
|
658 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
659 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
660 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
661 |
} |
662 |
} |
663 |
|
664 |
perlinterp_acquire (); |
665 |
|
666 |
EXTEND (SP, 2); |
667 |
PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.))))); |
668 |
PUSHs (sv_2mortal (newSVnv (peak / 255.))); |
669 |
} |
670 |
|
671 |
############################################################################# |
672 |
|
673 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
674 |
|
675 |
# currently only works for filenames (octet strings) |
676 |
|
677 |
SV * |
678 |
foldcase (SV *pathsv) |
679 |
PROTOTYPE: $ |
680 |
CODE: |
681 |
{ |
682 |
STRLEN plen; |
683 |
U8 *path = (U8 *)SvPV (pathsv, plen); |
684 |
U8 *pend = path + plen; |
685 |
U8 dst [plen * 6 * 3], *dstp = dst; |
686 |
|
687 |
while (path < pend) |
688 |
{ |
689 |
U8 ch = *path; |
690 |
|
691 |
if (ch >= 'a' && ch <= 'z') |
692 |
*dstp++ = *path++; |
693 |
else if (ch >= 'A' && ch <= 'Z') |
694 |
*dstp++ = *path++ + ('a' - 'A'); |
695 |
else if (ch >= '0' && ch <= '9') |
696 |
{ |
697 |
STRLEN el, nl = 0; |
698 |
while (*path >= '0' && *path <= '9' && path < pend) |
699 |
path++, nl++; |
700 |
|
701 |
for (el = nl; el < 6; el++) |
702 |
*dstp++ = '0'; |
703 |
|
704 |
memcpy (dstp, path - nl, nl); |
705 |
dstp += nl; |
706 |
} |
707 |
else |
708 |
*dstp++ = *path++; |
709 |
#if 0 |
710 |
else |
711 |
{ |
712 |
STRLEN cl; |
713 |
to_utf8_fold (path, dstp, &cl); |
714 |
dstp += cl; |
715 |
path += is_utf8_char (path); |
716 |
} |
717 |
#endif |
718 |
} |
719 |
|
720 |
RETVAL = newSVpvn ((const char *)dst, dstp - dst); |
721 |
} |
722 |
OUTPUT: |
723 |
RETVAL |
724 |
|
725 |
GdkPixbuf_noinc * |
726 |
p7_to_pb (int w, int h, SV *src_sv) |
727 |
PROTOTYPE: @ |
728 |
CODE: |
729 |
{ |
730 |
int x, y; |
731 |
guchar *dst, *d; |
732 |
int dstr; |
733 |
guchar *src = (guchar *)SvPVbyte_nolen (src_sv); |
734 |
|
735 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
736 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
737 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
738 |
|
739 |
for (y = 0; y < h; y++) |
740 |
for (d = dst + y * dstr, x = 0; x < w; x++) |
741 |
{ |
742 |
*d++ = (((*src >> 5) & 7) * 255 + 4) / 7; |
743 |
*d++ = (((*src >> 2) & 7) * 255 + 4) / 7; |
744 |
*d++ = (((*src >> 0) & 3) * 255 + 2) / 3; |
745 |
|
746 |
src++; |
747 |
} |
748 |
} |
749 |
OUTPUT: |
750 |
RETVAL |
751 |
|
752 |
############################################################################# |
753 |
|
754 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
755 |
|
756 |
void |
757 |
dump_ascii85 (PerlIO *fp, GdkPixbuf *pb) |
758 |
CODE: |
759 |
{ |
760 |
int w = gdk_pixbuf_get_width (pb); |
761 |
int h = gdk_pixbuf_get_height (pb); |
762 |
int x, y, i; |
763 |
guchar *dst; |
764 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
765 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
766 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
767 |
|
768 |
a85_init (); |
769 |
|
770 |
for (y = 0; y < h; y++) |
771 |
for (x = 0; x < w; x++) |
772 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
773 |
a85_push (fp, src [x * bpp + y * sstr + i]); |
774 |
|
775 |
a85_finish (fp); |
776 |
} |
777 |
|
778 |
void |
779 |
dump_binary (PerlIO *fp, GdkPixbuf *pb) |
780 |
CODE: |
781 |
{ |
782 |
int w = gdk_pixbuf_get_width (pb); |
783 |
int h = gdk_pixbuf_get_height (pb); |
784 |
int x, y, i; |
785 |
guchar *dst; |
786 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
787 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
788 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
789 |
|
790 |
for (y = 0; y < h; y++) |
791 |
for (x = 0; x < w; x++) |
792 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
793 |
PerlIO_putc (fp, src [x * bpp + y * sstr + i]); |
794 |
} |
795 |
|
796 |
############################################################################# |
797 |
|
798 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
799 |
|
800 |
SV * |
801 |
pb_to_hv84 (GdkPixbuf *pb) |
802 |
CODE: |
803 |
{ |
804 |
int w = gdk_pixbuf_get_width (pb); |
805 |
int h = gdk_pixbuf_get_height (pb); |
806 |
int x, y; |
807 |
guchar *dst; |
808 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
809 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
810 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
811 |
|
812 |
RETVAL = newSV (6 * 8 * 12 / 8); |
813 |
SvPOK_only (RETVAL); |
814 |
SvCUR_set (RETVAL, 6 * 8 * 12 / 8); |
815 |
|
816 |
dst = (guchar *)SvPVX (RETVAL); |
817 |
|
818 |
/* some primitive error distribution + random dithering */ |
819 |
|
820 |
for (y = 0; y < h; y++) |
821 |
{ |
822 |
guchar *p = src + y * sstr; |
823 |
|
824 |
for (x = 0; x < w; x += 2) |
825 |
{ |
826 |
unsigned int r, g, b, h, s, v, H, V1, V2; |
827 |
|
828 |
if (bpp == 3) |
829 |
r = *p++, g = *p++, b = *p++; |
830 |
else if (bpp == 1) |
831 |
r = g = b = *p++; |
832 |
else |
833 |
abort (); |
834 |
|
835 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
836 |
|
837 |
H = (h * 15 / 255) << 4; |
838 |
V1 = v; |
839 |
|
840 |
if (bpp == 3) |
841 |
r = *p++, g = *p++, b = *p++; |
842 |
else if (bpp == 1) |
843 |
r = g = b = *p++; |
844 |
else |
845 |
abort (); |
846 |
|
847 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
848 |
|
849 |
H |= h * 15 / 255; |
850 |
V2 = v; |
851 |
|
852 |
*dst++ = H; |
853 |
*dst++ = V1; |
854 |
*dst++ = V2; |
855 |
} |
856 |
} |
857 |
} |
858 |
OUTPUT: |
859 |
RETVAL |
860 |
|
861 |
SV * |
862 |
hv84_to_av (unsigned char *hv84) |
863 |
CODE: |
864 |
{ |
865 |
int i = 72 / 3; |
866 |
AV *av = newAV (); |
867 |
|
868 |
RETVAL = (SV *)newRV_noinc ((SV *)av); |
869 |
while (i--) |
870 |
{ |
871 |
int h = *hv84++; |
872 |
int v1 = *hv84++; |
873 |
int v2 = *hv84++; |
874 |
|
875 |
av_push (av, newSViv (v1)); |
876 |
av_push (av, newSViv ((h >> 4) * 255 / 15)); |
877 |
av_push (av, newSViv (v2)); |
878 |
av_push (av, newSViv ((h & 15) * 255 / 15)); |
879 |
} |
880 |
} |
881 |
OUTPUT: |
882 |
RETVAL |
883 |
|
884 |
############################################################################# |
885 |
|
886 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster |
887 |
|
888 |
SV * |
889 |
extract_features (SV *ar) |
890 |
CODE: |
891 |
{ |
892 |
int i; |
893 |
AV *av, *result; |
894 |
|
895 |
if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) |
896 |
croak ("Not an array ref as first argument to extract_features"); |
897 |
|
898 |
av = (AV *) SvRV (ar); |
899 |
result = newAV (); |
900 |
|
901 |
for (i = 0; i <= av_len (av); ++i) |
902 |
{ |
903 |
SV *sv = *av_fetch (av, i, 1); |
904 |
SV *histsv = newSV (9 * sizeof (float) + 1); |
905 |
|
906 |
SvPOK_on (histsv); |
907 |
SvCUR_set (histsv, 9 * sizeof (float)); |
908 |
float *hist = (float *)SvPVX (histsv); |
909 |
|
910 |
struct feature f_h, f_s, f_v; |
911 |
feature_init (&f_h); |
912 |
feature_init (&f_s); |
913 |
feature_init (&f_v); |
914 |
|
915 |
{ |
916 |
STRLEN len; |
917 |
unsigned char *buf = (unsigned char *)SvPVbyte (sv, len); |
918 |
while (len >= 3) |
919 |
{ |
920 |
unsigned int r, g, b, h, s, v; |
921 |
r = *buf++; g = *buf++; b = *buf++; |
922 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
923 |
|
924 |
feature_update_pass_1 (&f_h, h); |
925 |
feature_update_pass_1 (&f_s, s); |
926 |
feature_update_pass_1 (&f_v, v); |
927 |
|
928 |
len -= 3; |
929 |
} |
930 |
|
931 |
feature_finish_pass_1 (&f_h); |
932 |
feature_finish_pass_1 (&f_s); |
933 |
feature_finish_pass_1 (&f_v); |
934 |
} |
935 |
|
936 |
{ |
937 |
STRLEN len; |
938 |
unsigned char *buf = (unsigned char *)SvPVbyte (sv, len); |
939 |
while (len >= 3) |
940 |
{ |
941 |
unsigned int r, g, b, h, s, v; |
942 |
r = *buf++; g = *buf++; b = *buf++; |
943 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
944 |
|
945 |
feature_update_pass_2 (&f_h, h); |
946 |
feature_update_pass_2 (&f_s, s); |
947 |
feature_update_pass_2 (&f_v, v); |
948 |
|
949 |
len -= 3; |
950 |
} |
951 |
|
952 |
feature_finish_pass_2 (&f_h); |
953 |
feature_finish_pass_2 (&f_s); |
954 |
feature_finish_pass_2 (&f_v); |
955 |
} |
956 |
|
957 |
hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.; |
958 |
hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ; |
959 |
hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5; |
960 |
|
961 |
av_push (result, histsv); |
962 |
} |
963 |
|
964 |
RETVAL = newRV_noinc ((SV *)result); |
965 |
} |
966 |
OUTPUT: |
967 |
RETVAL |
968 |
|