| 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 |
#if JXL |
| 30 |
#include <jxl/decode.h> |
| 31 |
#include "jxl/thread_parallel_runner.h" |
| 32 |
#endif |
| 33 |
|
| 34 |
#include "perlmulticore.h" |
| 35 |
|
| 36 |
#define IW 80 /* MUST match Schnauzer.pm! */ |
| 37 |
#define IH 60 /* MUST match Schnauzer.pm! */ |
| 38 |
|
| 39 |
#define LINELENGTH 240 |
| 40 |
|
| 41 |
#define ELLIPSIS "\xe2\x80\xa6" |
| 42 |
|
| 43 |
typedef char *octet_string; |
| 44 |
|
| 45 |
static magic_t magic_cookie[2]; /* !mime, mime */ |
| 46 |
|
| 47 |
struct jpg_err_mgr |
| 48 |
{ |
| 49 |
struct jpeg_error_mgr err; |
| 50 |
jmp_buf setjmp_buffer; |
| 51 |
}; |
| 52 |
|
| 53 |
static void |
| 54 |
cv_error_exit (j_common_ptr cinfo) |
| 55 |
{ |
| 56 |
cinfo->err->output_message (cinfo); |
| 57 |
longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99); |
| 58 |
} |
| 59 |
|
| 60 |
static void |
| 61 |
cv_error_output (j_common_ptr cinfo) |
| 62 |
{ |
| 63 |
char msg[JMSG_LENGTH_MAX]; |
| 64 |
|
| 65 |
cinfo->err->format_message (cinfo, msg); |
| 66 |
|
| 67 |
fprintf (stderr, "JPEG decoding error: %s\n", msg); |
| 68 |
return; |
| 69 |
} |
| 70 |
|
| 71 |
static void |
| 72 |
rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b, |
| 73 |
unsigned int *h, unsigned int *s, unsigned int *v) |
| 74 |
{ |
| 75 |
unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b; |
| 76 |
unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b; |
| 77 |
unsigned int delta = mx - mn; |
| 78 |
|
| 79 |
*v = mx; |
| 80 |
|
| 81 |
*s = mx ? delta * 255 / mx : 0; |
| 82 |
|
| 83 |
if (delta == 0) |
| 84 |
*h = 0; |
| 85 |
else |
| 86 |
{ |
| 87 |
if (r == mx) |
| 88 |
*h = ((int)g - (int)b) * 255 / (int)(delta * 3); |
| 89 |
else if (g == mx) |
| 90 |
*h = ((int)b - (int)r) * 255 / (int)(delta * 3) + 52; |
| 91 |
else if (b == mx) |
| 92 |
*h = ((int)r - (int)g) * 255 / (int)(delta * 3) + 103; |
| 93 |
|
| 94 |
*h &= 255; |
| 95 |
} |
| 96 |
} |
| 97 |
|
| 98 |
struct feature { |
| 99 |
float v1, v2, v3; // mean, square, cube |
| 100 |
int n; |
| 101 |
}; |
| 102 |
|
| 103 |
static void |
| 104 |
feature_init (struct feature *f) |
| 105 |
{ |
| 106 |
f->v1 = 0.; |
| 107 |
f->v2 = 0.; |
| 108 |
f->v3 = 0.; |
| 109 |
f->n = 0; |
| 110 |
} |
| 111 |
|
| 112 |
// didn't find an algorithm to neatly do mean, variance and skew in one pass. |
| 113 |
// elmex ist schuld. |
| 114 |
static void |
| 115 |
feature_update_pass_1 (struct feature *f, unsigned int v) |
| 116 |
{ |
| 117 |
f->v1 += v; |
| 118 |
f->n += 1; |
| 119 |
} |
| 120 |
|
| 121 |
static void |
| 122 |
feature_finish_pass_1 (struct feature *f) |
| 123 |
{ |
| 124 |
if (f->n < 1) |
| 125 |
return; |
| 126 |
|
| 127 |
f->v1 /= f->n; |
| 128 |
} |
| 129 |
|
| 130 |
static void |
| 131 |
feature_update_pass_2 (struct feature *f, unsigned int v) |
| 132 |
{ |
| 133 |
float d = v - f->v1; |
| 134 |
|
| 135 |
f->v2 += d * d; |
| 136 |
f->v3 += d * d * d; |
| 137 |
} |
| 138 |
|
| 139 |
static void |
| 140 |
feature_finish_pass_2 (struct feature *f) |
| 141 |
{ |
| 142 |
if (f->n < 1) |
| 143 |
return; |
| 144 |
|
| 145 |
f->v2 /= f->n; |
| 146 |
f->v3 /= f->n; |
| 147 |
|
| 148 |
f->v1 /= 255.; |
| 149 |
f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2); |
| 150 |
f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.); |
| 151 |
} |
| 152 |
|
| 153 |
static guint32 a85_val; |
| 154 |
static guint a85_cnt; |
| 155 |
static guchar a85_buf[LINELENGTH], *a85_ptr; |
| 156 |
|
| 157 |
static void |
| 158 |
a85_init (void) |
| 159 |
{ |
| 160 |
a85_cnt = 4; |
| 161 |
a85_ptr = a85_buf; |
| 162 |
} |
| 163 |
|
| 164 |
static void |
| 165 |
a85_push (PerlIO *fp, guchar c) |
| 166 |
{ |
| 167 |
a85_val = a85_val << 8 | c; |
| 168 |
|
| 169 |
if (!--a85_cnt) |
| 170 |
{ |
| 171 |
a85_cnt = 4; |
| 172 |
if (a85_val) |
| 173 |
{ |
| 174 |
a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85; |
| 175 |
a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85; |
| 176 |
a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85; |
| 177 |
a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85; |
| 178 |
a85_ptr[0] = (a85_val ) + 33; |
| 179 |
|
| 180 |
a85_ptr += 5; |
| 181 |
} |
| 182 |
else |
| 183 |
*a85_ptr++ = 'z'; |
| 184 |
|
| 185 |
if (a85_ptr >= a85_buf + sizeof (a85_buf) - 7) |
| 186 |
{ |
| 187 |
*a85_ptr++ = '\n'; |
| 188 |
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
| 189 |
a85_ptr = a85_buf; |
| 190 |
} |
| 191 |
} |
| 192 |
|
| 193 |
} |
| 194 |
|
| 195 |
static void |
| 196 |
a85_finish (PerlIO *fp) |
| 197 |
{ |
| 198 |
while (a85_cnt != 4) |
| 199 |
a85_push (fp, 0); |
| 200 |
|
| 201 |
*a85_ptr++ = '~'; // probably buggy end-marker |
| 202 |
*a85_ptr++ = '>'; // probably buggy end-marker |
| 203 |
*a85_ptr++ = '\n'; |
| 204 |
|
| 205 |
PerlIO_write (fp, a85_buf, a85_ptr - a85_buf); |
| 206 |
} |
| 207 |
|
| 208 |
///////////////////////////////////////////////////////////////////////////// |
| 209 |
// memory source for libjpeg |
| 210 |
|
| 211 |
static void cv_ms_init (j_decompress_ptr cinfo) |
| 212 |
{ |
| 213 |
} |
| 214 |
|
| 215 |
static void cv_ms_term (j_decompress_ptr cinfo) |
| 216 |
{ |
| 217 |
} |
| 218 |
|
| 219 |
static boolean cv_ms_fill (j_decompress_ptr cinfo) |
| 220 |
{ |
| 221 |
// unexpected EOF, warn and generate fake EOI marker |
| 222 |
|
| 223 |
WARNMS (cinfo, JWRN_JPEG_EOF); |
| 224 |
|
| 225 |
struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src; |
| 226 |
|
| 227 |
static const JOCTET eoi[] = { 0xFF, JPEG_EOI }; |
| 228 |
|
| 229 |
src->next_input_byte = eoi; |
| 230 |
src->bytes_in_buffer = sizeof (eoi); |
| 231 |
|
| 232 |
return TRUE; |
| 233 |
} |
| 234 |
|
| 235 |
static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes) |
| 236 |
{ |
| 237 |
struct jpeg_source_mgr *src = (struct jpeg_source_mgr *)cinfo->src; |
| 238 |
|
| 239 |
src->next_input_byte += num_bytes; |
| 240 |
src->bytes_in_buffer -= num_bytes; |
| 241 |
} |
| 242 |
|
| 243 |
static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen) |
| 244 |
{ |
| 245 |
struct jpeg_source_mgr *src; |
| 246 |
|
| 247 |
if (!cinfo->src) |
| 248 |
cinfo->src = (struct jpeg_source_mgr *) |
| 249 |
(*cinfo->mem->alloc_small) ( |
| 250 |
(j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr) |
| 251 |
); |
| 252 |
|
| 253 |
src = (struct jpeg_source_mgr *)cinfo->src; |
| 254 |
src->init_source = cv_ms_init; |
| 255 |
src->fill_input_buffer = cv_ms_fill; |
| 256 |
src->skip_input_data = cv_ms_skip; |
| 257 |
src->resync_to_restart = jpeg_resync_to_restart; |
| 258 |
src->term_source = cv_ms_term; |
| 259 |
src->next_input_byte = (JOCTET *)buf; |
| 260 |
src->bytes_in_buffer = buflen; |
| 261 |
} |
| 262 |
|
| 263 |
///////////////////////////////////////////////////////////////////////////// |
| 264 |
|
| 265 |
/* great, the jpeg-xl reference implementaton requires us to parse bmff files */ |
| 266 |
|
| 267 |
struct bmff_box |
| 268 |
{ |
| 269 |
char type[4]; |
| 270 |
const uint8_t *ptr; |
| 271 |
size_t size; |
| 272 |
}; |
| 273 |
|
| 274 |
static int |
| 275 |
bmff_parse_box (struct bmff_box *box, const uint8_t **next_in, size_t *avail_in) |
| 276 |
{ |
| 277 |
if (*avail_in < 8) |
| 278 |
return 0; |
| 279 |
|
| 280 |
box->size = ((*next_in)[0] << 24) |
| 281 |
| ((*next_in)[1] << 16) |
| 282 |
| ((*next_in)[2] << 8) |
| 283 |
| ((*next_in)[3] ); |
| 284 |
|
| 285 |
if (box->size < 8) |
| 286 |
return 0; |
| 287 |
|
| 288 |
if (*avail_in < box->size) |
| 289 |
return 0; |
| 290 |
|
| 291 |
memcpy (box->type, *next_in + 4, 4); |
| 292 |
box->ptr = *next_in + 8; |
| 293 |
|
| 294 |
*next_in += box->size; |
| 295 |
*avail_in -= box->size; |
| 296 |
|
| 297 |
box->size -= 8; |
| 298 |
|
| 299 |
return 1; |
| 300 |
} |
| 301 |
|
| 302 |
///////////////////////////////////////////////////////////////////////////// |
| 303 |
|
| 304 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
| 305 |
|
| 306 |
PROTOTYPES: ENABLE |
| 307 |
|
| 308 |
# calculate the common prefix length of two strings |
| 309 |
# missing function in perl. really :) |
| 310 |
int |
| 311 |
common_prefix_length (a, b) |
| 312 |
unsigned char *a = (unsigned char *)SvPVutf8_nolen ($arg); |
| 313 |
unsigned char *b = (unsigned char *)SvPVutf8_nolen ($arg); |
| 314 |
CODE: |
| 315 |
RETVAL = 0; |
| 316 |
|
| 317 |
while (*a == *b && *a) |
| 318 |
{ |
| 319 |
RETVAL += (*a & 0xc0) != 0x80; |
| 320 |
a++, b++; |
| 321 |
} |
| 322 |
|
| 323 |
OUTPUT: |
| 324 |
RETVAL |
| 325 |
|
| 326 |
const char * |
| 327 |
magic (SV *path_or_data) |
| 328 |
ALIAS: |
| 329 |
magic = 0 |
| 330 |
magic_mime = 1 |
| 331 |
magic_buffer = 2 |
| 332 |
magic_buffer_mime = 3 |
| 333 |
CODE: |
| 334 |
{ |
| 335 |
STRLEN len; |
| 336 |
char *data = SvPVbyte (path_or_data, len); |
| 337 |
|
| 338 |
if (!magic_cookie[0]) |
| 339 |
{ |
| 340 |
magic_cookie[0] = magic_open (MAGIC_SYMLINK); |
| 341 |
magic_cookie[1] = magic_open (MAGIC_SYMLINK | MAGIC_MIME_TYPE); |
| 342 |
magic_load (magic_cookie[0], 0); |
| 343 |
magic_load (magic_cookie[1], 0); |
| 344 |
} |
| 345 |
|
| 346 |
perlinterp_release (); |
| 347 |
|
| 348 |
RETVAL = ix & 2 |
| 349 |
? magic_buffer (magic_cookie[ix & 1], data, len) |
| 350 |
: magic_file (magic_cookie[ix & 1], data); |
| 351 |
|
| 352 |
perlinterp_acquire (); |
| 353 |
} |
| 354 |
OUTPUT: |
| 355 |
RETVAL |
| 356 |
|
| 357 |
# missing/broken in Gtk2 perl module |
| 358 |
|
| 359 |
void |
| 360 |
gdk_window_clear_hints (GdkWindow *window) |
| 361 |
CODE: |
| 362 |
gdk_window_set_geometry_hints (window, 0, 0); |
| 363 |
|
| 364 |
gboolean |
| 365 |
gdk_net_wm_supports (GdkAtom property) |
| 366 |
CODE: |
| 367 |
#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE) |
| 368 |
RETVAL = gdk_net_wm_supports (property); |
| 369 |
#else |
| 370 |
RETVAL = 0; |
| 371 |
#endif |
| 372 |
OUTPUT: |
| 373 |
RETVAL |
| 374 |
|
| 375 |
GdkPixbuf_noinc * |
| 376 |
dealpha_expose (GdkPixbuf *pb) |
| 377 |
CODE: |
| 378 |
perlinterp_release (); |
| 379 |
{ |
| 380 |
int w = gdk_pixbuf_get_width (pb); |
| 381 |
int h = gdk_pixbuf_get_height (pb); |
| 382 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
| 383 |
int x, y, i; |
| 384 |
guchar *src = gdk_pixbuf_get_pixels (pb), *dst; |
| 385 |
int sstr = gdk_pixbuf_get_rowstride (pb), dstr; |
| 386 |
|
| 387 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
| 388 |
|
| 389 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
| 390 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
| 391 |
|
| 392 |
for (x = 0; x < w; x++) |
| 393 |
for (y = 0; y < h; y++) |
| 394 |
for (i = 0; i < 3; i++) |
| 395 |
dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i]; |
| 396 |
} |
| 397 |
perlinterp_acquire (); |
| 398 |
OUTPUT: |
| 399 |
RETVAL |
| 400 |
|
| 401 |
GdkPixbuf_noinc * |
| 402 |
rotate (GdkPixbuf *pb, int angle) |
| 403 |
CODE: |
| 404 |
perlinterp_release (); |
| 405 |
if (angle < 0) |
| 406 |
angle += 360; |
| 407 |
RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE |
| 408 |
: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE |
| 409 |
: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN |
| 410 |
: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE |
| 411 |
: angle); |
| 412 |
perlinterp_acquire (); |
| 413 |
OUTPUT: |
| 414 |
RETVAL |
| 415 |
|
| 416 |
const char * |
| 417 |
filetype (SV *image_data) |
| 418 |
CODE: |
| 419 |
{ |
| 420 |
STRLEN data_len; |
| 421 |
U8 *data = SvPVbyte (image_data, data_len); |
| 422 |
static const unsigned char jxl_header[] = { |
| 423 |
0, 0, 0, 0x0c, 0x4a, 0x58, 0x4c, 0x20, 0x0d, 0xa, 0x87, 0x0a |
| 424 |
}; |
| 425 |
|
| 426 |
if (data_len >= 20 |
| 427 |
&& data[0] == 0xff |
| 428 |
&& data[1] == 0xd8 |
| 429 |
&& data[2] == 0xff) |
| 430 |
RETVAL = "image/jpeg"; |
| 431 |
else if (data_len >= 12 |
| 432 |
&& data[ 0] == (U8)'R' |
| 433 |
&& data[ 1] == (U8)'I' |
| 434 |
&& data[ 2] == (U8)'F' |
| 435 |
&& data[ 3] == (U8)'F' |
| 436 |
&& data[ 8] == (U8)'W' |
| 437 |
&& data[ 9] == (U8)'E' |
| 438 |
&& data[10] == (U8)'B' |
| 439 |
&& data[11] == (U8)'P') |
| 440 |
RETVAL = "image/webp"; |
| 441 |
else if (data_len >= 16 |
| 442 |
&& data[ 0] == 0x89 |
| 443 |
&& data[ 1] == (U8)'P' |
| 444 |
&& data[ 2] == (U8)'N' |
| 445 |
&& data[ 3] == (U8)'G' |
| 446 |
&& data[ 4] == 0x0d |
| 447 |
&& data[ 5] == 0x0a |
| 448 |
&& data[ 6] == 0x1a |
| 449 |
&& data[ 7] == 0x0a) |
| 450 |
RETVAL = "image/png"; |
| 451 |
else if (data_len >= sizeof (jxl_header) && memcmp (data, jxl_header, sizeof (jxl_header)) == 0) |
| 452 |
RETVAL = "image/jxl"; // todo: might want to use JxlSignatureCheck |
| 453 |
else if (data_len >= 2 |
| 454 |
&& data[0] == 0xff |
| 455 |
&& data[1] == 0x0a) |
| 456 |
RETVAL = "image/jxl"; |
| 457 |
else if (data_len >= 13 |
| 458 |
&& data[0] == 'G' |
| 459 |
&& data[1] == 'I' |
| 460 |
&& data[2] == 'F' |
| 461 |
&& data[3] == '8' |
| 462 |
//&& (data[4] == '7' || data[4] == '9') |
| 463 |
&& data[5] == 'a') |
| 464 |
{ |
| 465 |
RETVAL = "image/gif"; |
| 466 |
|
| 467 |
// now see if its animated - we require the netscape application header for this |
| 468 |
int ofs = 13; |
| 469 |
|
| 470 |
if (data[10] & 0x80) |
| 471 |
ofs += (1 << ((data[10] & 7) + 1)) * 3; |
| 472 |
|
| 473 |
if (data_len >= ofs + 2 + 1 + 11) |
| 474 |
{ |
| 475 |
|
| 476 |
// skip a graphic control extension block. we assume |
| 477 |
// there is at most one such block - while the NAB |
| 478 |
// has to come firstz, some files do not obey this |
| 479 |
if (data[ofs] == 0x21 && data[ofs + 1] == 0xf9) |
| 480 |
ofs += 3 + data[ofs + 2] + 1; |
| 481 |
|
| 482 |
if (data_len >= ofs + 2 + 1 + 11) |
| 483 |
if (!memcmp (data + ofs, "\x21\xff\x0bNETSCAPE2.0", sizeof ("\x21\xff\x0bNETSCAPE2.0") - 1)) |
| 484 |
RETVAL = "video/gif"; |
| 485 |
} |
| 486 |
} |
| 487 |
|
| 488 |
else |
| 489 |
XSRETURN_UNDEF; |
| 490 |
} |
| 491 |
OUTPUT: |
| 492 |
RETVAL |
| 493 |
|
| 494 |
GdkPixbuf_noinc * |
| 495 |
decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0) |
| 496 |
CODE: |
| 497 |
{ |
| 498 |
#if WEBP |
| 499 |
STRLEN data_size; |
| 500 |
int alpha; |
| 501 |
WebPData data; |
| 502 |
WebPDemuxer *demux; |
| 503 |
WebPIterator iter; |
| 504 |
WebPDecoderConfig config; |
| 505 |
int inw, inh; |
| 506 |
|
| 507 |
data.bytes = (uint8_t *)SvPVbyte (image_data, data_size); |
| 508 |
data.size = data_size; |
| 509 |
|
| 510 |
perlinterp_release (); |
| 511 |
|
| 512 |
RETVAL = 0; |
| 513 |
|
| 514 |
if (!(demux = WebPDemux (&data))) |
| 515 |
goto err_demux; |
| 516 |
|
| 517 |
if (!WebPDemuxGetFrame (demux, 1, &iter)) |
| 518 |
goto err_iter; |
| 519 |
|
| 520 |
if (!WebPInitDecoderConfig (&config)) |
| 521 |
goto err_iter; |
| 522 |
|
| 523 |
config.options.use_threads = 1; |
| 524 |
|
| 525 |
if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK) |
| 526 |
goto err_iter; |
| 527 |
|
| 528 |
inw = config.input.width; |
| 529 |
inh = config.input.height; |
| 530 |
|
| 531 |
if (thumbnail) |
| 532 |
{ |
| 533 |
if (inw * ih > inh * iw) |
| 534 |
ih = (iw * inh + inw - 1) / inw; |
| 535 |
else |
| 536 |
iw = (ih * inw + inh - 1) / inh; |
| 537 |
|
| 538 |
config.options.bypass_filtering = 1; |
| 539 |
config.options.no_fancy_upsampling = 1; |
| 540 |
|
| 541 |
config.options.use_scaling = 1; |
| 542 |
config.options.scaled_width = iw; |
| 543 |
config.options.scaled_height = ih; |
| 544 |
} |
| 545 |
else |
| 546 |
{ |
| 547 |
iw = inw; |
| 548 |
ih = inh; |
| 549 |
} |
| 550 |
|
| 551 |
alpha = !!config.input.has_alpha; |
| 552 |
|
| 553 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih); |
| 554 |
if (!RETVAL) |
| 555 |
goto err_iter; |
| 556 |
|
| 557 |
config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB; |
| 558 |
config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL); |
| 559 |
config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL); |
| 560 |
config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL); |
| 561 |
config.output.is_external_memory = 1; |
| 562 |
|
| 563 |
if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK) |
| 564 |
{ |
| 565 |
g_object_unref (RETVAL); |
| 566 |
RETVAL = 0; |
| 567 |
goto err_iter; |
| 568 |
} |
| 569 |
|
| 570 |
err_iter: |
| 571 |
WebPDemuxReleaseIterator (&iter); |
| 572 |
err_demux: |
| 573 |
WebPDemuxDelete (demux); |
| 574 |
|
| 575 |
perlinterp_acquire (); |
| 576 |
#else |
| 577 |
croak ("load_webp: webp not enabled at compile time"); |
| 578 |
#endif |
| 579 |
} |
| 580 |
OUTPUT: |
| 581 |
RETVAL |
| 582 |
|
| 583 |
GdkPixbuf_noinc * |
| 584 |
decode_jxl (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0) |
| 585 |
CODE: |
| 586 |
{ |
| 587 |
#if JXL |
| 588 |
JxlDecoder *dec; |
| 589 |
JxlBasicInfo info; |
| 590 |
const uint8_t *next_in = (uint8_t *)SvPVbyte_nolen (image_data); |
| 591 |
size_t avail_in = SvCUR (image_data); |
| 592 |
const char *error = 0; |
| 593 |
JxlDecoderStatus status; |
| 594 |
void *runner = 0; |
| 595 |
|
| 596 |
RETVAL = 0; |
| 597 |
|
| 598 |
perlinterp_release (); |
| 599 |
|
| 600 |
dec = JxlDecoderCreate (0); |
| 601 |
|
| 602 |
error = "JxlDecoderCreate failed"; |
| 603 |
if (!dec) |
| 604 |
goto done; |
| 605 |
|
| 606 |
runner = JxlThreadParallelRunnerCreate (0, JxlThreadParallelRunnerDefaultNumWorkerThreads ()); |
| 607 |
|
| 608 |
status = JxlDecoderSetParallelRunner (dec, JxlThreadParallelRunner, runner); |
| 609 |
error = "JxlDecoderSetParallelRunner failed"; |
| 610 |
if (status != JXL_DEC_SUCCESS) |
| 611 |
goto done; |
| 612 |
|
| 613 |
error = "JxlDecoderSubscribeEvents failed"; |
| 614 |
status = JxlDecoderSubscribeEvents (dec, JXL_DEC_BASIC_INFO | JXL_DEC_FULL_IMAGE); |
| 615 |
if (status != JXL_DEC_SUCCESS) |
| 616 |
goto done; |
| 617 |
|
| 618 |
status = JxlDecoderSetInput (dec, next_in, avail_in); |
| 619 |
error = "JxlDecoderSetInput failed"; |
| 620 |
if (status != JXL_DEC_SUCCESS) |
| 621 |
goto done; |
| 622 |
|
| 623 |
for (;;) |
| 624 |
{ |
| 625 |
status = JxlDecoderProcessInput (dec); |
| 626 |
|
| 627 |
switch (status) |
| 628 |
{ |
| 629 |
case JXL_DEC_FULL_IMAGE: |
| 630 |
error = 0; |
| 631 |
goto done; |
| 632 |
|
| 633 |
case JXL_DEC_ERROR: |
| 634 |
error = "JxlDecoderProcessInput failed"; |
| 635 |
goto done; |
| 636 |
|
| 637 |
case JXL_DEC_NEED_MORE_INPUT: |
| 638 |
error = "incomplete file"; |
| 639 |
goto done; |
| 640 |
|
| 641 |
case JXL_DEC_SUCCESS: |
| 642 |
error = "incomplete decode"; |
| 643 |
goto done; |
| 644 |
|
| 645 |
case JXL_DEC_BASIC_INFO: |
| 646 |
{ |
| 647 |
status = JxlDecoderGetBasicInfo (dec, &info); |
| 648 |
error = "JxlDecoderGetBasicInfo failed"; |
| 649 |
if (status != JXL_DEC_SUCCESS) |
| 650 |
goto done; |
| 651 |
|
| 652 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!info.alpha_bits, 8, info.xsize, info.ysize); |
| 653 |
error = "unable to allocate pixbuf"; |
| 654 |
if (!RETVAL) |
| 655 |
goto done; |
| 656 |
|
| 657 |
JxlPixelFormat format = { |
| 658 |
info.alpha_bits ? 4 : 3, |
| 659 |
JXL_TYPE_UINT8, |
| 660 |
JXL_NATIVE_ENDIAN, |
| 661 |
gdk_pixbuf_get_rowstride (RETVAL) |
| 662 |
}; |
| 663 |
|
| 664 |
// cannot use gdk_pixbuf_get_byte_length because that does |
| 665 |
// not return the size of the buffer, but the size of the buffer without |
| 666 |
// the last padding bytes. the internal buffer is rowstride * ysize, |
| 667 |
// and this is what the jxl decoder needs. none of this is documented |
| 668 |
// in either library, of course. |
| 669 |
|
| 670 |
status = JxlDecoderSetImageOutBuffer ( |
| 671 |
dec, |
| 672 |
&format, |
| 673 |
gdk_pixbuf_get_pixels (RETVAL), |
| 674 |
gdk_pixbuf_get_rowstride (RETVAL) * info.ysize |
| 675 |
); |
| 676 |
error = "JxlDecoderSetImageOutBuffer failed"; |
| 677 |
if (status != JXL_DEC_SUCCESS) |
| 678 |
goto done; |
| 679 |
} |
| 680 |
break; |
| 681 |
|
| 682 |
default: |
| 683 |
error = "unexpected event"; |
| 684 |
goto done; |
| 685 |
} |
| 686 |
} |
| 687 |
|
| 688 |
done: |
| 689 |
if (dec) |
| 690 |
JxlDecoderDestroy (dec); |
| 691 |
|
| 692 |
if (runner) |
| 693 |
JxlThreadParallelRunnerDestroy (runner); |
| 694 |
|
| 695 |
perlinterp_acquire (); |
| 696 |
|
| 697 |
if (error) |
| 698 |
{ |
| 699 |
if (RETVAL) |
| 700 |
g_object_unref (RETVAL); |
| 701 |
|
| 702 |
croak ("load_jxl: %s (status %d)", error, status); |
| 703 |
} |
| 704 |
#else |
| 705 |
croak ("load_jxl: jpeg-xl not enabled at compile time"); |
| 706 |
#endif |
| 707 |
} |
| 708 |
OUTPUT: |
| 709 |
RETVAL |
| 710 |
|
| 711 |
GdkPixbuf_noinc * |
| 712 |
decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0) |
| 713 |
CODE: |
| 714 |
{ |
| 715 |
struct jpeg_decompress_struct cinfo; |
| 716 |
struct jpg_err_mgr jerr; |
| 717 |
int rs; |
| 718 |
volatile GdkPixbuf *pb = 0; |
| 719 |
STRLEN data_len; |
| 720 |
guchar *data = SvPVbyte (image_data, data_len); |
| 721 |
|
| 722 |
RETVAL = 0; |
| 723 |
|
| 724 |
perlinterp_release (); |
| 725 |
|
| 726 |
cinfo.err = jpeg_std_error (&jerr.err); |
| 727 |
|
| 728 |
jerr.err.error_exit = cv_error_exit; |
| 729 |
jerr.err.output_message = cv_error_output; |
| 730 |
|
| 731 |
if ((rs = setjmp (jerr.setjmp_buffer))) |
| 732 |
{ |
| 733 |
jpeg_destroy_decompress (&cinfo); |
| 734 |
|
| 735 |
if (pb) |
| 736 |
g_object_unref ((gpointer)pb); |
| 737 |
|
| 738 |
perlinterp_acquire (); |
| 739 |
XSRETURN_UNDEF; |
| 740 |
} |
| 741 |
|
| 742 |
if (!data_len) |
| 743 |
longjmp (jerr.setjmp_buffer, 4); |
| 744 |
|
| 745 |
jpeg_create_decompress (&cinfo); |
| 746 |
cv_jpeg_mem_src (&cinfo, data, data_len); |
| 747 |
|
| 748 |
jpeg_read_header (&cinfo, TRUE); |
| 749 |
|
| 750 |
cinfo.dct_method = JDCT_DEFAULT; |
| 751 |
cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */ |
| 752 |
cinfo.do_block_smoothing = FALSE; |
| 753 |
cinfo.out_color_space = JCS_RGB; |
| 754 |
cinfo.quantize_colors = FALSE; |
| 755 |
|
| 756 |
cinfo.scale_num = 1; |
| 757 |
cinfo.scale_denom = 1; |
| 758 |
|
| 759 |
jpeg_calc_output_dimensions (&cinfo); |
| 760 |
|
| 761 |
if (thumbnail) |
| 762 |
{ |
| 763 |
cinfo.dct_method = JDCT_FASTEST; |
| 764 |
cinfo.do_fancy_upsampling = FALSE; |
| 765 |
|
| 766 |
while (cinfo.scale_denom < 8 |
| 767 |
&& cinfo.output_width >= iw*4 |
| 768 |
&& cinfo.output_height >= ih*4) |
| 769 |
{ |
| 770 |
cinfo.scale_denom <<= 1; |
| 771 |
jpeg_calc_output_dimensions (&cinfo); |
| 772 |
} |
| 773 |
} |
| 774 |
|
| 775 |
if (cinfo.output_components != 3) |
| 776 |
longjmp (jerr.setjmp_buffer, 3); |
| 777 |
|
| 778 |
if (cinfo.jpeg_color_space == JCS_YCCK || cinfo.jpeg_color_space == JCS_CMYK) |
| 779 |
{ |
| 780 |
cinfo.out_color_space = JCS_CMYK; |
| 781 |
cinfo.output_components = 4; |
| 782 |
} |
| 783 |
|
| 784 |
pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height); |
| 785 |
if (!RETVAL) |
| 786 |
longjmp (jerr.setjmp_buffer, 2); |
| 787 |
|
| 788 |
data = gdk_pixbuf_get_pixels (RETVAL); |
| 789 |
rs = gdk_pixbuf_get_rowstride (RETVAL); |
| 790 |
|
| 791 |
jpeg_start_decompress (&cinfo); |
| 792 |
|
| 793 |
while (cinfo.output_scanline < cinfo.output_height) |
| 794 |
{ |
| 795 |
int remaining = cinfo.output_height - cinfo.output_scanline; |
| 796 |
JSAMPROW rp[4]; |
| 797 |
|
| 798 |
rp [0] = data + cinfo.output_scanline * rs; |
| 799 |
rp [1] = (guchar *)rp [0] + rs; |
| 800 |
rp [2] = (guchar *)rp [1] + rs; |
| 801 |
rp [3] = (guchar *)rp [2] + rs; |
| 802 |
|
| 803 |
jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4); |
| 804 |
} |
| 805 |
|
| 806 |
if (cinfo.out_color_space == JCS_CMYK) |
| 807 |
{ |
| 808 |
guchar *end = data + cinfo.output_height * rs; |
| 809 |
|
| 810 |
while (data < end) |
| 811 |
{ |
| 812 |
U32 c = data [0]; |
| 813 |
U32 m = data [1]; |
| 814 |
U32 y = data [2]; |
| 815 |
U32 k = data [3]; |
| 816 |
|
| 817 |
if (0) |
| 818 |
if (cinfo.Adobe_transform == 2) |
| 819 |
{ |
| 820 |
c ^= 0xff; |
| 821 |
m ^= 0xff; |
| 822 |
y ^= 0xff; |
| 823 |
k ^= 0xff; |
| 824 |
} |
| 825 |
|
| 826 |
data [0] = (c * k + 0x80) / 0xff; |
| 827 |
data [1] = (m * k + 0x80) / 0xff; |
| 828 |
data [2] = (y * k + 0x80) / 0xff; |
| 829 |
data [3] = 0xff; |
| 830 |
|
| 831 |
data += 4; |
| 832 |
} |
| 833 |
} |
| 834 |
|
| 835 |
jpeg_finish_decompress (&cinfo); |
| 836 |
jpeg_destroy_decompress (&cinfo); |
| 837 |
perlinterp_acquire (); |
| 838 |
} |
| 839 |
OUTPUT: |
| 840 |
RETVAL |
| 841 |
|
| 842 |
void |
| 843 |
compare (GdkPixbuf *a, GdkPixbuf *b) |
| 844 |
PPCODE: |
| 845 |
perlinterp_release (); |
| 846 |
{ |
| 847 |
int w = gdk_pixbuf_get_width (a); |
| 848 |
int h = gdk_pixbuf_get_height (a); |
| 849 |
|
| 850 |
int sa = gdk_pixbuf_get_rowstride (a); |
| 851 |
int sb = gdk_pixbuf_get_rowstride (b); |
| 852 |
|
| 853 |
guchar *pa = gdk_pixbuf_get_pixels (a); |
| 854 |
guchar *pb = gdk_pixbuf_get_pixels (b); |
| 855 |
|
| 856 |
int x, y; |
| 857 |
|
| 858 |
assert (w == gdk_pixbuf_get_width (b)); |
| 859 |
assert (h == gdk_pixbuf_get_height (b)); |
| 860 |
|
| 861 |
assert (gdk_pixbuf_get_n_channels (a) == 3); |
| 862 |
assert (gdk_pixbuf_get_n_channels (b) == 3); |
| 863 |
|
| 864 |
double diff = 0.; |
| 865 |
int peak = 0; |
| 866 |
|
| 867 |
if (w && h) |
| 868 |
for (y = 0; y < h; y++) |
| 869 |
{ |
| 870 |
guchar *pa_ = pa + y * sa; |
| 871 |
guchar *pb_ = pb + y * sb; |
| 872 |
|
| 873 |
for (x = 0; x < w; x++) |
| 874 |
{ |
| 875 |
int d; |
| 876 |
|
| 877 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
| 878 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
| 879 |
d = ((int)*pa_++) - ((int)*pb_++); diff += d*d; peak = MAX (peak, abs (d)); |
| 880 |
} |
| 881 |
} |
| 882 |
|
| 883 |
perlinterp_acquire (); |
| 884 |
|
| 885 |
EXTEND (SP, 2); |
| 886 |
PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.))))); |
| 887 |
PUSHs (sv_2mortal (newSVnv (peak / 255.))); |
| 888 |
} |
| 889 |
|
| 890 |
############################################################################# |
| 891 |
|
| 892 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer |
| 893 |
|
| 894 |
# currently only works for filenames (octet strings) |
| 895 |
|
| 896 |
SV * |
| 897 |
foldcase (SV *pathsv) |
| 898 |
PROTOTYPE: $ |
| 899 |
CODE: |
| 900 |
{ |
| 901 |
STRLEN plen; |
| 902 |
U8 *path = (U8 *)SvPV (pathsv, plen); |
| 903 |
U8 *pend = path + plen; |
| 904 |
U8 dst [plen * 8 * 3], *dstp = dst; |
| 905 |
|
| 906 |
while (path < pend) |
| 907 |
{ |
| 908 |
U8 ch = *path; |
| 909 |
|
| 910 |
if (ch >= 'a' && ch <= 'z') |
| 911 |
*dstp++ = *path++; |
| 912 |
else if (ch >= 'A' && ch <= 'Z') |
| 913 |
*dstp++ = *path++ + ('a' - 'A'); |
| 914 |
else if (ch >= '0' && ch <= '9') |
| 915 |
{ |
| 916 |
/* version sort, up to 8 digits */ |
| 917 |
STRLEN el, nl = 0; |
| 918 |
while (*path >= '0' && *path <= '9' && path < pend) |
| 919 |
path++, nl++; |
| 920 |
|
| 921 |
for (el = nl; el < 8; el++) |
| 922 |
*dstp++ = '0'; |
| 923 |
|
| 924 |
memcpy (dstp, path - nl, nl); |
| 925 |
dstp += nl; |
| 926 |
} |
| 927 |
else |
| 928 |
*dstp++ = *path++; |
| 929 |
#if 0 |
| 930 |
else |
| 931 |
{ |
| 932 |
STRLEN cl; |
| 933 |
to_utf8_fold (path, dstp, &cl); |
| 934 |
dstp += cl; |
| 935 |
path += is_utf8_char (path); |
| 936 |
} |
| 937 |
#endif |
| 938 |
} |
| 939 |
|
| 940 |
RETVAL = newSVpvn ((const char *)dst, dstp - dst); |
| 941 |
} |
| 942 |
OUTPUT: |
| 943 |
RETVAL |
| 944 |
|
| 945 |
GdkPixbuf_noinc * |
| 946 |
p7_to_pb (int w, int h, SV *src_sv) |
| 947 |
PROTOTYPE: @ |
| 948 |
CODE: |
| 949 |
{ |
| 950 |
int x, y; |
| 951 |
guchar *dst, *d; |
| 952 |
int dstr; |
| 953 |
guchar *src = (guchar *)SvPVbyte_nolen (src_sv); |
| 954 |
|
| 955 |
RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h); |
| 956 |
dst = gdk_pixbuf_get_pixels (RETVAL); |
| 957 |
dstr = gdk_pixbuf_get_rowstride (RETVAL); |
| 958 |
|
| 959 |
for (y = 0; y < h; y++) |
| 960 |
for (d = dst + y * dstr, x = 0; x < w; x++) |
| 961 |
{ |
| 962 |
*d++ = (((*src >> 5) & 7) * 255 + 4) / 7; |
| 963 |
*d++ = (((*src >> 2) & 7) * 255 + 4) / 7; |
| 964 |
*d++ = (((*src >> 0) & 3) * 255 + 2) / 3; |
| 965 |
|
| 966 |
src++; |
| 967 |
} |
| 968 |
} |
| 969 |
OUTPUT: |
| 970 |
RETVAL |
| 971 |
|
| 972 |
############################################################################# |
| 973 |
|
| 974 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript |
| 975 |
|
| 976 |
void |
| 977 |
dump_ascii85 (PerlIO *fp, GdkPixbuf *pb) |
| 978 |
CODE: |
| 979 |
{ |
| 980 |
int w = gdk_pixbuf_get_width (pb); |
| 981 |
int h = gdk_pixbuf_get_height (pb); |
| 982 |
int x, y, i; |
| 983 |
guchar *dst; |
| 984 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
| 985 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
| 986 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
| 987 |
|
| 988 |
a85_init (); |
| 989 |
|
| 990 |
for (y = 0; y < h; y++) |
| 991 |
for (x = 0; x < w; x++) |
| 992 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
| 993 |
a85_push (fp, src [x * bpp + y * sstr + i]); |
| 994 |
|
| 995 |
a85_finish (fp); |
| 996 |
} |
| 997 |
|
| 998 |
void |
| 999 |
dump_binary (PerlIO *fp, GdkPixbuf *pb) |
| 1000 |
CODE: |
| 1001 |
{ |
| 1002 |
int w = gdk_pixbuf_get_width (pb); |
| 1003 |
int h = gdk_pixbuf_get_height (pb); |
| 1004 |
int x, y, i; |
| 1005 |
guchar *dst; |
| 1006 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
| 1007 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
| 1008 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
| 1009 |
|
| 1010 |
for (y = 0; y < h; y++) |
| 1011 |
for (x = 0; x < w; x++) |
| 1012 |
for (i = 0; i < (bpp < 3 ? 1 : 3); i++) |
| 1013 |
PerlIO_putc (fp, src [x * bpp + y * sstr + i]); |
| 1014 |
} |
| 1015 |
|
| 1016 |
############################################################################# |
| 1017 |
|
| 1018 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV |
| 1019 |
|
| 1020 |
SV * |
| 1021 |
pb_to_hv84 (GdkPixbuf *pb) |
| 1022 |
CODE: |
| 1023 |
{ |
| 1024 |
int w = gdk_pixbuf_get_width (pb); |
| 1025 |
int h = gdk_pixbuf_get_height (pb); |
| 1026 |
int x, y; |
| 1027 |
guchar *dst; |
| 1028 |
int bpp = gdk_pixbuf_get_n_channels (pb); |
| 1029 |
guchar *src = gdk_pixbuf_get_pixels (pb); |
| 1030 |
int sstr = gdk_pixbuf_get_rowstride (pb); |
| 1031 |
|
| 1032 |
RETVAL = newSV (6 * 8 * 12 / 8); |
| 1033 |
SvPOK_only (RETVAL); |
| 1034 |
SvCUR_set (RETVAL, 6 * 8 * 12 / 8); |
| 1035 |
|
| 1036 |
dst = (guchar *)SvPVX (RETVAL); |
| 1037 |
|
| 1038 |
/* some primitive error distribution + random dithering */ |
| 1039 |
|
| 1040 |
for (y = 0; y < h; y++) |
| 1041 |
{ |
| 1042 |
guchar *p = src + y * sstr; |
| 1043 |
|
| 1044 |
for (x = 0; x < w; x += 2) |
| 1045 |
{ |
| 1046 |
unsigned int r, g, b, h, s, v, H, V1, V2; |
| 1047 |
|
| 1048 |
if (bpp == 3) |
| 1049 |
r = *p++, g = *p++, b = *p++; |
| 1050 |
else if (bpp == 1) |
| 1051 |
r = g = b = *p++; |
| 1052 |
else |
| 1053 |
abort (); |
| 1054 |
|
| 1055 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
| 1056 |
|
| 1057 |
H = (h * 15 / 255) << 4; |
| 1058 |
V1 = v; |
| 1059 |
|
| 1060 |
if (bpp == 3) |
| 1061 |
r = *p++, g = *p++, b = *p++; |
| 1062 |
else if (bpp == 1) |
| 1063 |
r = g = b = *p++; |
| 1064 |
else |
| 1065 |
abort (); |
| 1066 |
|
| 1067 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
| 1068 |
|
| 1069 |
H |= h * 15 / 255; |
| 1070 |
V2 = v; |
| 1071 |
|
| 1072 |
*dst++ = H; |
| 1073 |
*dst++ = V1; |
| 1074 |
*dst++ = V2; |
| 1075 |
} |
| 1076 |
} |
| 1077 |
} |
| 1078 |
OUTPUT: |
| 1079 |
RETVAL |
| 1080 |
|
| 1081 |
SV * |
| 1082 |
hv84_to_av (unsigned char *hv84) |
| 1083 |
CODE: |
| 1084 |
{ |
| 1085 |
int i = 72 / 3; |
| 1086 |
AV *av = newAV (); |
| 1087 |
|
| 1088 |
RETVAL = (SV *)newRV_noinc ((SV *)av); |
| 1089 |
while (i--) |
| 1090 |
{ |
| 1091 |
int h = *hv84++; |
| 1092 |
int v1 = *hv84++; |
| 1093 |
int v2 = *hv84++; |
| 1094 |
|
| 1095 |
av_push (av, newSViv (v1)); |
| 1096 |
av_push (av, newSViv ((h >> 4) * 255 / 15)); |
| 1097 |
av_push (av, newSViv (v2)); |
| 1098 |
av_push (av, newSViv ((h & 15) * 255 / 15)); |
| 1099 |
} |
| 1100 |
} |
| 1101 |
OUTPUT: |
| 1102 |
RETVAL |
| 1103 |
|
| 1104 |
############################################################################# |
| 1105 |
|
| 1106 |
MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster |
| 1107 |
|
| 1108 |
SV * |
| 1109 |
extract_features (SV *ar) |
| 1110 |
CODE: |
| 1111 |
{ |
| 1112 |
int i; |
| 1113 |
AV *av, *result; |
| 1114 |
|
| 1115 |
if (!SvROK (ar) || SvTYPE (SvRV (ar)) != SVt_PVAV) |
| 1116 |
croak ("Not an array ref as first argument to extract_features"); |
| 1117 |
|
| 1118 |
av = (AV *) SvRV (ar); |
| 1119 |
result = newAV (); |
| 1120 |
|
| 1121 |
for (i = 0; i <= av_len (av); ++i) |
| 1122 |
{ |
| 1123 |
SV *sv = *av_fetch (av, i, 1); |
| 1124 |
SV *histsv = newSV (9 * sizeof (float) + 1); |
| 1125 |
|
| 1126 |
SvPOK_on (histsv); |
| 1127 |
SvCUR_set (histsv, 9 * sizeof (float)); |
| 1128 |
float *hist = (float *)SvPVX (histsv); |
| 1129 |
|
| 1130 |
struct feature f_h, f_s, f_v; |
| 1131 |
feature_init (&f_h); |
| 1132 |
feature_init (&f_s); |
| 1133 |
feature_init (&f_v); |
| 1134 |
|
| 1135 |
{ |
| 1136 |
STRLEN len; |
| 1137 |
unsigned char *buf = (unsigned char *)SvPVbyte (sv, len); |
| 1138 |
while (len >= 3) |
| 1139 |
{ |
| 1140 |
unsigned int r, g, b, h, s, v; |
| 1141 |
r = *buf++; g = *buf++; b = *buf++; |
| 1142 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
| 1143 |
|
| 1144 |
feature_update_pass_1 (&f_h, h); |
| 1145 |
feature_update_pass_1 (&f_s, s); |
| 1146 |
feature_update_pass_1 (&f_v, v); |
| 1147 |
|
| 1148 |
len -= 3; |
| 1149 |
} |
| 1150 |
|
| 1151 |
feature_finish_pass_1 (&f_h); |
| 1152 |
feature_finish_pass_1 (&f_s); |
| 1153 |
feature_finish_pass_1 (&f_v); |
| 1154 |
} |
| 1155 |
|
| 1156 |
{ |
| 1157 |
STRLEN len; |
| 1158 |
unsigned char *buf = (unsigned char *)SvPVbyte (sv, len); |
| 1159 |
while (len >= 3) |
| 1160 |
{ |
| 1161 |
unsigned int r, g, b, h, s, v; |
| 1162 |
r = *buf++; g = *buf++; b = *buf++; |
| 1163 |
rgb_to_hsv (r, g, b, &h, &s, &v); |
| 1164 |
|
| 1165 |
feature_update_pass_2 (&f_h, h); |
| 1166 |
feature_update_pass_2 (&f_s, s); |
| 1167 |
feature_update_pass_2 (&f_v, v); |
| 1168 |
|
| 1169 |
len -= 3; |
| 1170 |
} |
| 1171 |
|
| 1172 |
feature_finish_pass_2 (&f_h); |
| 1173 |
feature_finish_pass_2 (&f_s); |
| 1174 |
feature_finish_pass_2 (&f_v); |
| 1175 |
} |
| 1176 |
|
| 1177 |
hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.; |
| 1178 |
hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ; |
| 1179 |
hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5; |
| 1180 |
|
| 1181 |
av_push (result, histsv); |
| 1182 |
} |
| 1183 |
|
| 1184 |
RETVAL = newRV_noinc ((SV *)result); |
| 1185 |
} |
| 1186 |
OUTPUT: |
| 1187 |
RETVAL |
| 1188 |
|
