| 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-pixbuf/gdk-pixbuf.h> |
| 15 |
|
| 16 |
#include <gperl.h> |
| 17 |
#include <gtk2perl.h> |
| 18 |
|
| 19 |
#define IW 80 /* MUST match Schnauzer.pm! */ |
| 20 |
#define IH 60 /* MUST match Schnauzer.pm! */ |
| 21 |
|
| 22 |
#define RAND (seed = (seed + 7141) * 54773 % 134456) |
| 23 |
|
| 24 |
#define LINELENGTH 240 |
| 25 |
|
| 26 |
#define ELLIPSIS "\xe2\x80\xa6" |
| 27 |
|
| 28 |
struct jpg_err_mgr |
| 29 |
{ |
| 30 |
struct jpeg_error_mgr err; |
| 31 |
jmp_buf setjmp_buffer; |
| 32 |
}; |
| 33 |
|
| 34 |
static void |
| 35 |
cv_error_exit (j_common_ptr cinfo) |
| 36 |
{ |
| 37 |
longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); |
| 38 |
} |
| 39 |
|
| 40 |
static void |
| 41 |
cv_error_output (j_common_ptr cinfo) |
| 42 |
{ |
| 43 |
return; |
| 44 |
} |
| 45 |
|
| 46 |
static void |
| 47 |
rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, |
| 48 |
unsigned int *h, unsigned int *s, unsigned int *v) |
| 49 |
{ |
| 50 |
unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b; |
| 51 |
unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b; |
| 52 |
unsigned int delta = mx - mn; |
| 53 |
|
| 54 |
*v = mx; |
| 55 |
|
| 56 |
*s = mx ? delta * 255 / mx : 0; |
| 57 |
|
| 58 |
if (delta == 0) |
| 59 |
*h = 0; |
| 60 |
else |
| 61 |
{ |
| 62 |
if (r == mx) |
| 63 |
*h = ((int)g - (int)b) * 255 / (int)(delta * 3); |
| 64 |
else if (g == mx) |
| 65 |
*h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52; |
| 66 |
else if (b == mx) |
| 67 |
*h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103; |
| 68 |
|
| 69 |
*h &= 255; |
| 70 |
} |
| 71 |
} |
| 72 |
|
| 73 |
struct feature { |
| 74 |
float v1, v2, v3; // mean, square, cube |
| 75 |
int n; |
| 76 |
}; |
| 77 |
|
| 78 |
static void |
| 79 |
feature_init (struct feature *f) |
| 80 |
{ |
| 81 |
f->v1 = 0.; |
| 82 |
f->v2 = 0.; |
| 83 |
f->v3 = 0.; |
| 84 |
f->n = 0; |
| 85 |
} |
| 86 |
|
| 87 |
// didn't find an algorithm to neatly do mean, variance and skew in one pass. |
| 88 |
// elmex ist schuld. |
| 89 |
static void |
| 90 |
feature_update_pass_1 (struct feature *f, unsigned int v) |
| 91 |
{ |
| 92 |
f->v1 += v; |
| 93 |
f->n += 1; |
| 94 |
} |
| 95 |
|
| 96 |
static void |
| 97 |
feature_finish_pass_1 (struct feature *f) |
| 98 |
{ |
| 99 |
if (f->n < 1) |
| 100 |
return; |
| 101 |
|
| 102 |
f->v1 /= f->n; |
| 103 |
} |
| 104 |
|
| 105 |
static void |
| 106 |
feature_update_pass_2 (struct feature *f, unsigned int v) |
| 107 |
{ |
| 108 |
float d = v - f->v1; |
| 109 |
|
| 110 |
f->v2 += d * d; |
| 111 |
f->v3 += d * d * d; |
| 112 |
} |
| 113 |
|
| 114 |
static void |
| 115 |
feature_finish_pass_2 (struct feature *f) |
| 116 |
{ |
| 117 |
if (f->n < 1) |
| 118 |
return; |
| 119 |
|
| 120 |
f->v2 /= f->n; |
| 121 |
f->v3 /= f->n; |
| 122 |
|
| 123 |
f->v1 /= 255.; |
| 124 |
f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2); |
| 125 |
f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.); |
| 126 |
} |
| 127 |
|
| 128 |
static guint32 a85_val; |
| 129 |
static guint a85_cnt; |
| 130 |
static guchar a85_buf[LINELENGTH], *a85_ptr; |
| 131 |
|
| 132 |
static void |
| 133 |
a85_init (void) |
| 134 |
{ |
| 135 |
a85_cnt = 4; |
| 136 |
a85_ptr = a85_buf; |
| 137 |
} |
| 138 |
|
| 139 |
static void |
| 140 |
a85_push (PerlIO *fp, guchar c) |
| 141 |
{ |
| 142 |
a85_val = a85_val << 8 | c; |
| 143 |
|
| 144 |
if (!--a85_cnt) |
| 145 |
{ |
| 146 |
a85_cnt = 4; |
| 147 |
if (a85_val) |
| 148 |
{ |
| 149 |
a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; |
| 150 |
a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; |
| 151 |
a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; |
| 152 |
a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; |
| 153 |
a85_ptr[0] = (a85_val ) + 33; |
| 154 |
|
| 155 |
a85_ptr += 5; |
| 156 |
} |
| 157 |
else |
| 158 |
*a85_ptr++ = 'z'; |
| 159 |
|
| 160 |
if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7) |
| 161 |
{ |
| 162 |
*a85_ptr++ = '\n'; |
| 163 |
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
| 164 |
a85_ptr = a85_buf; |
| 165 |
} |
| 166 |
} |
| 167 |
|
| 168 |
} |
| 169 |
|
| 170 |
static void |
| 171 |
a85_finish (PerlIO *fp) |
| 172 |
{ |
| 173 |
while (a85_cnt != 4) |
| 174 |
a85_push (fp, 0); |
| 175 |
|
| 176 |
*a85_ptr++ = '~'; // probably buggy end-marker |
| 177 |
*a85_ptr++ = '>'; // probably buggy end-marker |
| 178 |
*a85_ptr++ = '\n'; |
| 179 |
|
| 180 |
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
| 181 |
} |
| 182 |
|
| 183 |
///////////////////////////////////////////////////////////////////////////// |
| 184 |
|
| 185 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
| 186 |
|
| 187 |
PROTOTYPES: ENABLE |
| 188 |
|
| 189 |
# missing function in perl. really :) |
| 190 |
int |
| 191 |
common_prefix_length (a, b) |
| 192 |
unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg); |
| 193 |
unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg); |
| 194 |
CODE: |
| 195 |
RETVAL = 0; |
| 196 |
|
| 197 |
while (*a == *b && *a) |
| 198 |
{ |
| 199 |
RETVAL += (*a & 0xc0) != 0x80; |
| 200 |
a++, b++; |
| 201 |
} |
| 202 |
|
| 203 |
OUTPUT: |
| 204 |
RETVAL |
| 205 |
|
| 206 |
const char * |
| 207 |
magic (const char *path) |
| 208 |
CODE: |
| 209 |
{ |
| 210 |
static magic_t cookie; |
| 211 |
|
| 212 |
if (!cookie) |
| 213 |
{ |
| 214 |
cookie = magic_open (MAGIC_NONE); |
| 215 |
|
| 216 |
if (cookie) |
| 217 |
magic_load (cookie, 0); |
| 218 |
else |
| 219 |
XSRETURN_UNDEF; |
| 220 |
} |
| 221 |
|
| 222 |
RETVAL = magic_file (cookie, path); |
| 223 |
} |
| 224 |
OUTPUT: |
| 225 |
RETVAL |
| 226 |
|
| 227 |
const char * |
| 228 |
magic_mime (const char *path) |
| 229 |
CODE: |
| 230 |
{ |
| 231 |
static magic_t cookie; |
| 232 |
|
| 233 |
if (!cookie) |
| 234 |
{ |
| 235 |
cookie = magic_open (MAGIC_MIME); |
| 236 |
|
| 237 |
if (cookie) |
| 238 |
magic_load (cookie, 0); |
| 239 |
else |
| 240 |
XSRETURN_UNDEF; |
| 241 |
} |
| 242 |
|
| 243 |
RETVAL = magic_file (cookie, path); |
| 244 |
} |
| 245 |
OUTPUT: |
| 246 |
RETVAL |
| 247 |
|
| 248 |
# missing in Gtk2 perl module |
| 249 |
|
| 250 |
gboolean |
| 251 |
gdk_net_wm_supports (GdkAtom property) |
| 252 |
CODE: |
| 253 |
#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) |
| 254 |
RETVAL = gdk_net_wm_supports (property); |
| 255 |
#else |
| 256 |
RETVAL = 0; |
| 257 |
#endif |
| 258 |
OUTPUT: |
| 259 |
RETVAL |
| 260 |
|
| 261 |
GdkPixbuf_noinc * |
| 262 |
dealpha_expose (GdkPixbuf *pb) |
| 263 |
CODE: |
| 264 |
{ |
| 265 |
int w = gdk_pixbuf_get_width (pb); |
| 266 |
int h = gdk_pixbuf_get_height (pb); |
| 267 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
| 268 |
int x, y, i; |
| 269 |
guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
| 270 |
int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
| 271 |
|
| 272 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
| 273 |
|
| 274 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
| 275 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
| 276 |
|
| 277 |
for (x = 0; x < w; x++) |
| 278 |
for (y = 0; y < h; y++) |
| 279 |
for (i = 0; i < 3; i++) |
| 280 |
dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i]; |
| 281 |
} |
| 282 |
OUTPUT: |
| 283 |
RETVAL |
| 284 |
|
| 285 |
GdkPixbuf_noinc * |
| 286 |
rotate (GdkPixbuf *pb, int angle) |
| 287 |
CODE: |
| 288 |
RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE |
| 289 |
: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE |
| 290 |
: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN |
| 291 |
: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE |
| 292 |
: angle); |
| 293 |
OUTPUT: |
| 294 |
RETVAL |
| 295 |
|
| 296 |
GdkPixbuf_noinc * |
| 297 |
load_jpeg (SV *path, int thumbnail=0) |
| 298 |
CODE: |
| 299 |
{ |
| 300 |
struct jpeg_decompress_struct cinfo; |
| 301 |
struct jpg_err_mgr jerr; |
| 302 |
guchar *data; |
| 303 |
int rs; |
| 304 |
FILE *fp; |
| 305 |
volatile GdkPixbuf *pb = 0; |
| 306 |
|
| 307 |
RETVAL = 0; |
| 308 |
|
| 309 |
fp = fopen (SvPVbyte_nolen (path), "rb"); |
| 310 |
|
| 311 |
if (!fp) |
| 312 |
XSRETURN_UNDEF; |
| 313 |
|
| 314 |
cinfo.err = jpeg_std_error (&jerr.err); |
| 315 |
|
| 316 |
jerr.err.error_exit = cv_error_exit; |
| 317 |
jerr.err.output_message = cv_error_output; |
| 318 |
|
| 319 |
if ((rs = setjmp (jerr.setjmp_buffer))) |
| 320 |
{ |
| 321 |
fclose (fp); |
| 322 |
jpeg_destroy_decompress (&cinfo); |
| 323 |
|
| 324 |
if (pb) |
| 325 |
g_object_unref ((gpointer)pb); |
| 326 |
|
| 327 |
XSRETURN_UNDEF; |
| 328 |
} |
| 329 |
|
| 330 |
jpeg_create_decompress (&cinfo); |
| 331 |
|
| 332 |
jpeg_stdio_src (&cinfo, fp); |
| 333 |
jpeg_read_header (&cinfo, TRUE); |
| 334 |
|
| 335 |
cinfo.dct_method = JDCT_DEFAULT; |
| 336 |
cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */ |
| 337 |
cinfo.do_block_smoothing = FALSE; |
| 338 |
cinfo.out_color_space = JCS_RGB; |
| 339 |
cinfo.quantize_colors = FALSE; |
| 340 |
|
| 341 |
cinfo.scale_num = 1; |
| 342 |
cinfo.scale_denom = 1; |
| 343 |
|
| 344 |
jpeg_calc_output_dimensions (&cinfo); |
| 345 |
|
| 346 |
if (thumbnail) |
| 347 |
{ |
| 348 |
cinfo.dct_method = JDCT_FASTEST; |
| 349 |
cinfo.do_fancy_upsampling = FALSE; |
| 350 |
|
| 351 |
while (cinfo.scale_denom < 8 |
| 352 |
&& cinfo.output_width >= IW*4 |
| 353 |
&& cinfo.output_height >= IH*4) |
| 354 |
{ |
| 355 |
cinfo.scale_denom <<= 1; |
| 356 |
jpeg_calc_output_dimensions (&cinfo); |
| 357 |
} |
| 358 |
} |
| 359 |
|
| 360 |
pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height); |
| 361 |
if (!RETVAL) |
| 362 |
longjmp (jerr.setjmp_buffer, 2); |
| 363 |
|
| 364 |
data = gdk_pixbuf_get_pixels (RETVAL); |
| 365 |
rs = gdk_pixbuf_get_rowstride (RETVAL); |
| 366 |
|
| 367 |
if (cinfo.output_components != 3) |
| 368 |
longjmp (jerr.setjmp_buffer, 3); |
| 369 |
|
| 370 |
jpeg_start_decompress (&cinfo); |
| 371 |
|
| 372 |
while (cinfo.output_scanline < cinfo.output_height) |
| 373 |
{ |
| 374 |
int remaining = cinfo.output_height - cinfo.output_scanline; |
| 375 |
JSAMPROW rp[4]; |
| 376 |
|
| 377 |
rp [0] = data + cinfo.output_scanline * rs; |
| 378 |
rp [1] = (guchar *)rp [0] + rs; |
| 379 |
rp [2] = (guchar *)rp [1] + rs; |
| 380 |
rp [3] = (guchar *)rp [2] + rs; |
| 381 |
|
| 382 |
jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); |
| 383 |
} |
| 384 |
|
| 385 |
jpeg_finish_decompress (&cinfo); |
| 386 |
fclose (fp); |
| 387 |
jpeg_destroy_decompress (&cinfo); |
| 388 |
} |
| 389 |
OUTPUT: |
| 390 |
RETVAL |
| 391 |
|
| 392 |
void |
| 393 |
compare (GdkPixbuf *a, GdkPixbuf *b) |
| 394 |
PPCODE: |
| 395 |
{ |
| 396 |
int w = gdk_pixbuf_get_width (a); |
| 397 |
int h = gdk_pixbuf_get_height (a); |
| 398 |
int sa = gdk_pixbuf_get_rowstride (a); |
| 399 |
int sb = gdk_pixbuf_get_rowstride (b); |
| 400 |
|
| 401 |
guchar *pa = gdk_pixbuf_get_pixels (a); |
| 402 |
guchar *pb = gdk_pixbuf_get_pixels (b); |
| 403 |
|
| 404 |
int x, y; |
| 405 |
|
| 406 |
assert (w == gdk_pixbuf_get_width (b)); |
| 407 |
assert (h == gdk_pixbuf_get_height (b)); |
| 408 |
|
| 409 |
assert (gdk_pixbuf_get_n_channels (a) == 3); |
| 410 |
assert (gdk_pixbuf_get_n_channels (b) == 3); |
| 411 |
|
| 412 |
double diff = 0.; |
| 413 |
int peak = 0; |
| 414 |
|
| 415 |
if (w && h) |
| 416 |
for (y = 0; y < h; y++) |
| 417 |
{ |
| 418 |
guchar *pa_ = pa + y * sa; |
| 419 |
guchar *pb_ = pb + y * sb; |
| 420 |
|
| 421 |
for (x = 0; x < w; x++) |
| 422 |
{ |
| 423 |
int d; |
| 424 |
|
| 425 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
| 426 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
| 427 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
| 428 |
} |
| 429 |
} |
| 430 |
|
| 431 |
EXTEND (SP, 2); |
| 432 |
PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.))))); |
| 433 |
PUSHs (sv_2mortal (newSVnv (peak / 255.))); |
| 434 |
} |
| 435 |
|
| 436 |
############################################################################# |
| 437 |
|
| 438 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
| 439 |
|
| 440 |
SV * |
| 441 |
foldcase (SV *pathsv) |
| 442 |
PROTOTYPE: $ |
| 443 |
CODE: |
| 444 |
{ |
| 445 |
STRLEN plen; |
| 446 |
U8 *path = (U8 *)SvPVutf8 (pathsv, plen); |
| 447 |
U8 *pend = path + plen; |
| 448 |
U8 dst [plen * 6 * 3], *dstp = dst; |
| 449 |
|
| 450 |
while (path < pend) |
| 451 |
{ |
| 452 |
U8 ch = *path; |
| 453 |
|
| 454 |
if (ch >= 'a' && ch <= 'z') |
| 455 |
*dstp++ = *path++; |
| 456 |
else if (ch >= '0' && ch <= '9') |
| 457 |
{ |
| 458 |
STRLEN el, nl = 0; |
| 459 |
while (*path >= '0' && *path <= '9' && path < pend) |
| 460 |
path++, nl++; |
| 461 |
|
| 462 |
for (el = nl; el < 6; el++) |
| 463 |
*dstp++ = '0'; |
| 464 |
|
| 465 |
memcpy (dstp, path - nl, nl); |
| 466 |
dstp += nl; |
| 467 |
} |
| 468 |
else |
| 469 |
{ |
| 470 |
STRLEN cl; |
| 471 |
to_utf8_fold (path, dstp, &cl); |
| 472 |
dstp += cl; |
| 473 |
path += is_utf8_char (path); |
| 474 |
} |
| 475 |
} |
| 476 |
|
| 477 |
RETVAL = newSVpvn ((const char *)dst, dstp - dst); |
| 478 |
} |
| 479 |
OUTPUT: |
| 480 |
RETVAL |
| 481 |
|
| 482 |
GdkPixbuf_noinc * |
| 483 |
p7_to_pb (int w, int h, SV *src_sv) |
| 484 |
PROTOTYPE: @ |
| 485 |
CODE: |
| 486 |
{ |
| 487 |
int x, y; |
| 488 |
guchar *dst, *d; |
| 489 |
int dstr; |
| 490 |
guchar *src = (guchar *)SvPVbyte_nolen (src_sv); |
| 491 |
|
| 492 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
| 493 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
| 494 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
| 495 |
|
| 496 |
for (y = 0; y < h; y++) |
| 497 |
for (d = dst + y * dstr, x = 0; x < w; x++) |
| 498 |
{ |
| 499 |
*d++ = (((*src >> 5) & 7) * 255 + 4) / 7; |
| 500 |
*d++ = (((*src >> 2) & 7) * 255 + 4) / 7; |
| 501 |
*d++ = (((*src >> 0) & 3) * 255 + 2) / 3; |
| 502 |
|
| 503 |
src++; |
| 504 |
} |
| 505 |
} |
| 506 |
OUTPUT: |
| 507 |
RETVAL |
| 508 |
|
| 509 |
############################################################################# |
| 510 |
|
| 511 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
| 512 |
|
| 513 |
void |
| 514 |
dump_ascii85 (PerlIO *fp, GdkPixbuf *pb) |
| 515 |
CODE: |
| 516 |
{ |
| 517 |
int w = gdk_pixbuf_get_width (pb); |
| 518 |
int h = gdk_pixbuf_get_height (pb); |
| 519 |
int x, y, i; |
| 520 |
guchar *dst; |
| 521 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
| 522 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
| 523 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
| 524 |
|
| 525 |
a85_init (); |
| 526 |
|
| 527 |
for (y = 0; y < h; y++) |
| 528 |
for (x = 0; x < w; x++) |
| 529 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
| 530 |
a85_push (fp, src [x * bpp + y * sstr + i]); |
| 531 |
|
| 532 |
a85_finish (fp); |
| 533 |
} |
| 534 |
|
| 535 |
void |
| 536 |
dump_binary (PerlIO *fp, GdkPixbuf *pb) |
| 537 |
CODE: |
| 538 |
{ |
| 539 |
int w = gdk_pixbuf_get_width (pb); |
| 540 |
int h = gdk_pixbuf_get_height (pb); |
| 541 |
int x, y, i; |
| 542 |
guchar *dst; |
| 543 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
| 544 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
| 545 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
| 546 |
|
| 547 |
for (y = 0; y < h; y++) |
| 548 |
for (x = 0; x < w; x++) |
| 549 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
| 550 |
PerlIO_putc (fp, src [x * bpp + y * sstr + i]); |
| 551 |
} |
| 552 |
|
| 553 |
############################################################################# |
| 554 |
|
| 555 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
| 556 |
|
| 557 |
SV * |
| 558 |
pb_to_hv84 (GdkPixbuf *pb) |
| 559 |
CODE: |
| 560 |
{ |
| 561 |
int w = gdk_pixbuf_get_width (pb); |
| 562 |
int h = gdk_pixbuf_get_height (pb); |
| 563 |
int x, y; |
| 564 |
guchar *dst; |
| 565 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
| 566 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
| 567 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
| 568 |
|
| 569 |
RETVAL = newSV (6 * 8 * 12 / 8); |
| 570 |
SvPOK_only (RETVAL); |
| 571 |
SvCUR_set (RETVAL, 6 * 8 * 12 / 8); |
| 572 |
|
| 573 |
dst = (guchar *)SvPVX (RETVAL); |
| 574 |
|
| 575 |
/* some primitive error distribution + random dithering */ |
| 576 |
|
| 577 |
for (y = 0; y < h; y++) |
| 578 |
{ |
| 579 |
guchar *p = src + y * sstr; |
| 580 |
|
| 581 |
for (x = 0; x < w; x += 2) |
| 582 |
{ |
| 583 |
unsigned int r, g, b, h, s, v, H, V1, V2; |
| 584 |
|
| 585 |
if (bpp == 3) |
| 586 |
r = *p++, g = *p++, b = *p++; |
| 587 |
else if (bpp == 1) |
| 588 |
r = g = b = *p++; |
| 589 |
else |
| 590 |
abort (); |
| 591 |
|
| 592 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
| 593 |
|
| 594 |
H = (h * 15 / 255) << 4; |
| 595 |
V1 = v; |
| 596 |
|
| 597 |
if (bpp == 3) |
| 598 |
r = *p++, g = *p++, b = *p++; |
| 599 |
else if (bpp == 1) |
| 600 |
r = g = b = *p++; |
| 601 |
else |
| 602 |
abort (); |
| 603 |
|
| 604 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
| 605 |
|
| 606 |
H |= h * 15 / 255; |
| 607 |
V2 = v; |
| 608 |
|
| 609 |
*dst++ = H; |
| 610 |
*dst++ = V1; |
| 611 |
*dst++ = V2; |
| 612 |
} |
| 613 |
} |
| 614 |
} |
| 615 |
OUTPUT: |
| 616 |
RETVAL |
| 617 |
|
| 618 |
SV * |
| 619 |
hv84_to_av (unsigned char *hv84) |
| 620 |
CODE: |
| 621 |
{ |
| 622 |
int i = 72 / 3; |
| 623 |
AV *av = newAV (); |
| 624 |
|
| 625 |
RETVAL = (SV *)newRV_noinc ((SV *)av); |
| 626 |
while (i--) |
| 627 |
{ |
| 628 |
int h = *hv84++; |
| 629 |
int v1 = *hv84++; |
| 630 |
int v2 = *hv84++; |
| 631 |
|
| 632 |
av_push (av, newSViv (v1)); |
| 633 |
av_push (av, newSViv ((h >> 4) * 255 / 15)); |
| 634 |
av_push (av, newSViv (v2)); |
| 635 |
av_push (av, newSViv ((h & 15) * 255 / 15)); |
| 636 |
} |
| 637 |
} |
| 638 |
OUTPUT: |
| 639 |
RETVAL |
| 640 |
|
| 641 |
############################################################################# |
| 642 |
|
| 643 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster |
| 644 |
|
| 645 |
SV * |
| 646 |
extract_features (SV *ar) |
| 647 |
CODE: |
| 648 |
{ |
| 649 |
int i; |
| 650 |
AV *av, *result; |
| 651 |
|
| 652 |
if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) |
| 653 |
croak ("Not an array ref as first argument to make_histogram"); |
| 654 |
|
| 655 |
av = (AV *) SvRV (ar); |
| 656 |
result = newAV (); |
| 657 |
|
| 658 |
for (i = 0; i <= av_len (av); ++i) |
| 659 |
{ |
| 660 |
SV *sv = *av_fetch (av, i, 1); |
| 661 |
SV *histsv = newSV (9 * sizeof (float) + 1); |
| 662 |
|
| 663 |
SvPOK_on (histsv); |
| 664 |
SvCUR_set (histsv, 9 * sizeof (float)); |
| 665 |
float *hist = (float *)SvPVX (histsv); |
| 666 |
|
| 667 |
struct feature f_h, f_s, f_v; |
| 668 |
feature_init (&f_h); |
| 669 |
feature_init (&f_s); |
| 670 |
feature_init (&f_v); |
| 671 |
|
| 672 |
{ |
| 673 |
STRLEN len; |
| 674 |
unsigned char *buf = (unsigned char *)SvPVbyte (sv, len); |
| 675 |
while (len >= 3) |
| 676 |
{ |
| 677 |
unsigned int r, g, b, h, s, v; |
| 678 |
r = *buf++; g = *buf++; b = *buf++; |
| 679 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
| 680 |
|
| 681 |
feature_update_pass_1 (&f_h, h); |
| 682 |
feature_update_pass_1 (&f_s, s); |
| 683 |
feature_update_pass_1 (&f_v, v); |
| 684 |
|
| 685 |
len -= 3; |
| 686 |
} |
| 687 |
|
| 688 |
feature_finish_pass_1 (&f_h); |
| 689 |
feature_finish_pass_1 (&f_s); |
| 690 |
feature_finish_pass_1 (&f_v); |
| 691 |
} |
| 692 |
|
| 693 |
{ |
| 694 |
STRLEN len; |
| 695 |
unsigned char *buf = (unsigned char *)SvPVbyte (sv, len); |
| 696 |
while (len >= 3) |
| 697 |
{ |
| 698 |
unsigned int r, g, b, h, s, v; |
| 699 |
r = *buf++; g = *buf++; b = *buf++; |
| 700 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
| 701 |
|
| 702 |
feature_update_pass_2 (&f_h, h); |
| 703 |
feature_update_pass_2 (&f_s, s); |
| 704 |
feature_update_pass_2 (&f_v, v); |
| 705 |
|
| 706 |
len -= 3; |
| 707 |
} |
| 708 |
|
| 709 |
feature_finish_pass_2 (&f_h); |
| 710 |
feature_finish_pass_2 (&f_s); |
| 711 |
feature_finish_pass_2 (&f_v); |
| 712 |
} |
| 713 |
|
| 714 |
hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.; |
| 715 |
hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ; |
| 716 |
hist [6] = f_v.v1 ; hist [7] = f_v.v2 ; hist [8] = f_v.v3 ; |
| 717 |
|
| 718 |
av_push (result, histsv); |
| 719 |
} |
| 720 |
|
| 721 |
RETVAL = newRV_noinc ((SV *)result); |
| 722 |
} |
| 723 |
OUTPUT: |
| 724 |
RETVAL |
| 725 |
|
| 726 |
SV * |
| 727 |
make_histograms (SV *ar) |
| 728 |
CODE: |
| 729 |
{ |
| 730 |
int i; |
| 731 |
AV *av, *result; |
| 732 |
|
| 733 |
if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) |
| 734 |
croak ("Not an array ref as first argument to make_histogram"); |
| 735 |
|
| 736 |
av = (AV *) SvRV (ar); |
| 737 |
result = newAV (); |
| 738 |
|
| 739 |
for (i = 0; i <= av_len (av); ++i) |
| 740 |
{ |
| 741 |
const int HISTSIZE = 64; |
| 742 |
|
| 743 |
int j; |
| 744 |
SV *sv = *av_fetch (av, i, 1); |
| 745 |
STRLEN len; |
| 746 |
char *buf = SvPVbyte (sv, len); |
| 747 |
|
| 748 |
int tmphist[HISTSIZE]; |
| 749 |
float *hist; |
| 750 |
|
| 751 |
SV *histsv = newSV (HISTSIZE * sizeof (float) + 1); |
| 752 |
SvPOK_on (histsv); |
| 753 |
SvCUR_set (histsv, HISTSIZE * sizeof (float)); |
| 754 |
hist = (float *)SvPVX (histsv); |
| 755 |
|
| 756 |
Zero (tmphist, sizeof (tmphist), char); |
| 757 |
|
| 758 |
for (j = len; j--; ) |
| 759 |
{ |
| 760 |
unsigned int idx |
| 761 |
= ((*buf & 0xc0) >> 2) |
| 762 |
| ((*buf & 0x18) >> 1) |
| 763 |
| (*buf & 0x03); |
| 764 |
|
| 765 |
++tmphist[idx]; |
| 766 |
++buf; |
| 767 |
} |
| 768 |
|
| 769 |
for (j = 0; j < HISTSIZE; ++j) |
| 770 |
hist[j] = (float)tmphist[j] / (len + 1e-30); |
| 771 |
|
| 772 |
av_push (result, histsv); |
| 773 |
} |
| 774 |
|
| 775 |
RETVAL = newRV_noinc ((SV *)result); |
| 776 |
} |
| 777 |
OUTPUT: |
| 778 |
RETVAL |
| 779 |
|
| 780 |
|
