[ViewVC] Diff of: cvs/CV/CV.xs

Comparing CV/CV.xs (file contents):
Revision 1.20 by root, Fri Jul 22 06:14:25 2005 UTC vs.
Revision 1.42 by root, Sun Sep 14 12:47:59 2008 UTC

…		…
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#include <string.h>	5	#include <string.h>
6	#include <setjmp.h>	6	#include <setjmp.h>
		7	#include <math.h>
		8
		9	#include <magic.h>
7		10
8	#include <jpeglib.h>	11	#include <jpeglib.h>
		12	#include <glib.h>
		13	#include <gtk/gtk.h>
9	#include <gdk-pixbuf/gdk-pixbuf.h>	14	#include <gdk-pixbuf/gdk-pixbuf.h>
10		15
11	#include <gperl.h>	16	#include <gperl.h>
12	#include <gtk2perl.h>	17	#include <gtk2perl.h>
13		18
14	#define IW 80 /* MUST match Schnauer.pm! */	19	#define IW 80 /* MUST match Schnauzer.pm! */
15	#define IH 60 /* MUST match Schnauer.pm! */	20	#define IH 60 /* MUST match Schnauzer.pm! */
16		21
17	#define RAND (seed = (seed + 7141) * 54773 % 134456)	22	#define RAND (seed = (seed + 7141) * 54773 % 134456)
18		23
19	#define LINELENGTH 240	24	#define LINELENGTH 240
20		25
21	#define ELLIPSIS "\xe2\x80\xa6"	26	#define ELLIPSIS "\xe2\x80\xa6"
		27
		28	typedef char *octet_string;
22		29
23	struct jpg_err_mgr	30	struct jpg_err_mgr
24	{	31	{
25	struct jpeg_error_mgr err;	32	struct jpeg_error_mgr err;
26	jmp_buf setjmp_buffer;	33	jmp_buf setjmp_buffer;
…		…
63		70
64	*h &= 255;	71	*h &= 255;
65	}	72	}
66	}	73	}
67		74
		75	struct feature {
		76	float v1, v2, v3; // mean, square, cube
		77	int n;
		78	};
		79
		80	static void
		81	feature_init (struct feature *f)
		82	{
		83	f->v1 = 0.;
		84	f->v2 = 0.;
		85	f->v3 = 0.;
		86	f->n = 0;
		87	}
		88
		89	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		90	// elmex ist schuld.
		91	static void
		92	feature_update_pass_1 (struct feature *f, unsigned int v)
		93	{
		94	f->v1 += v;
		95	f->n += 1;
		96	}
		97
		98	static void
		99	feature_finish_pass_1 (struct feature *f)
		100	{
		101	if (f->n < 1)
		102	return;
		103
		104	f->v1 /= f->n;
		105	}
		106
		107	static void
		108	feature_update_pass_2 (struct feature *f, unsigned int v)
		109	{
		110	float d = v - f->v1;
		111
		112	f->v2 += d * d;
		113	f->v3 += d * d * d;
		114	}
		115
		116	static void
		117	feature_finish_pass_2 (struct feature *f)
		118	{
		119	if (f->n < 1)
		120	return;
		121
		122	f->v2 /= f->n;
		123	f->v3 /= f->n;
		124
		125	f->v1 /= 255.;
		126	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		127	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		128	}
		129
68	static guint32 a85_val;	130	static guint32 a85_val;
69	static guint a85_cnt;	131	static guint a85_cnt;
70	static guchar a85_buf[LINELENGTH], *a85_ptr;	132	static guchar a85_buf[LINELENGTH], *a85_ptr;
71		133
72	static void	134	static void
…		…
124		186
125	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	187	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
126		188
127	PROTOTYPES: ENABLE	189	PROTOTYPES: ENABLE
128		190
		191	# missing function in perl. really :)
		192	int
		193	common_prefix_length (a, b)
		194	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		195	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		196	CODE:
		197	RETVAL = 0;
		198
		199	while (a == b && *a)
		200	{
		201	RETVAL += (*a & 0xc0) != 0x80;
		202	a++, b++;
		203	}
		204
		205	OUTPUT:
		206	RETVAL
		207
		208	const char *
		209	magic (octet_string path)
		210	CODE:
		211	{
		212	static magic_t cookie;
		213
		214	if (!cookie)
		215	{
		216	cookie = magic_open (MAGIC_NONE);
		217
		218	if (cookie)
		219	magic_load (cookie, 0);
		220	else
		221	XSRETURN_UNDEF;
		222	}
		223
		224	RETVAL = magic_file (cookie, path);
		225	}
		226	OUTPUT:
		227	RETVAL
		228
		229	const char *
		230	magic_mime (octet_string path)
		231	CODE:
		232	{
		233	static magic_t cookie;
		234
		235	if (!cookie)
		236	{
		237	cookie = magic_open (MAGIC_MIME);
		238
		239	if (cookie)
		240	magic_load (cookie, 0);
		241	else
		242	XSRETURN_UNDEF;
		243	}
		244
		245	RETVAL = magic_file (cookie, path);
		246	}
		247	OUTPUT:
		248	RETVAL
		249
		250	# missing/broken in Gtk2 perl module
		251
		252	void
		253	gdk_window_clear_hints (GdkWindow *window)
		254	CODE:
		255	gdk_window_set_geometry_hints (window, 0, 0);
		256
		257	gboolean
		258	gdk_net_wm_supports (GdkAtom property)
		259	CODE:
		260	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		261	RETVAL = gdk_net_wm_supports (property);
		262	#else
		263	RETVAL = 0;
		264	#endif
		265	OUTPUT:
		266	RETVAL
		267
129	GdkPixbuf_noinc *	268	GdkPixbuf_noinc *
130	transpose (GdkPixbuf *pb)	269	dealpha_expose (GdkPixbuf *pb)
131	CODE:	270	CODE:
132	{	271	{
133	int w = gdk_pixbuf_get_width (pb);	272	int w = gdk_pixbuf_get_width (pb);
134	int h = gdk_pixbuf_get_height (pb);	273	int h = gdk_pixbuf_get_height (pb);
135	int bpp = gdk_pixbuf_get_n_channels (pb);	274	int bpp = gdk_pixbuf_get_n_channels (pb);
136	int x, y, i;	275	int x, y, i;
137	guchar src = gdk_pixbuf_get_pixels (pb), dst;	276	guchar src = gdk_pixbuf_get_pixels (pb), dst;
138	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	277	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
139		278
140	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	279	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
141		280
142	dst = gdk_pixbuf_get_pixels (RETVAL);	281	dst = gdk_pixbuf_get_pixels (RETVAL);
143	dstr = gdk_pixbuf_get_rowstride (RETVAL);	282	dstr = gdk_pixbuf_get_rowstride (RETVAL);
144		283
145	for (y = 0; y < h; y++)
146	for (x = 0; x < w; x++)	284	for (x = 0; x < w; x++)
		285	for (y = 0; y < h; y++)
147	for (i = 0; i < bpp; i++)	286	for (i = 0; i < 3; i++)
148	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	287	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
149	}	288	}
150	OUTPUT:	289	OUTPUT:
151	RETVAL	290	RETVAL
152		291
153	GdkPixbuf_noinc *	292	GdkPixbuf_noinc *
154	flop (GdkPixbuf *pb)	293	rotate (GdkPixbuf *pb, int angle)
155	CODE:	294	CODE:
156	{	295	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
157	int w = gdk_pixbuf_get_width (pb);	296	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
158	int h = gdk_pixbuf_get_height (pb);	297	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
159	int bpp = gdk_pixbuf_get_n_channels (pb);	298	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
160	int x, y, i;	299	: angle);
161	guchar src = gdk_pixbuf_get_pixels (pb), dst;
162	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
163
164	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
165
166	dst = gdk_pixbuf_get_pixels (RETVAL);
167	dstr = gdk_pixbuf_get_rowstride (RETVAL);
168
169	for (y = 0; y < h; y++)
170	for (x = 0; x < w; x++)
171	for (i = 0; i < bpp; i++)
172	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
173	}
174	OUTPUT:	300	OUTPUT:
175	RETVAL	301	RETVAL
176		302
177	GdkPixbuf_noinc *	303	GdkPixbuf_noinc *
178	load_jpeg (char *path, int thumbnail=0)	304	load_jpeg (SV *path, int thumbnail=0)
179	CODE:	305	CODE:
180	{	306	{
181	struct jpeg_decompress_struct cinfo;	307	struct jpeg_decompress_struct cinfo;
182	struct jpg_err_mgr jerr;	308	struct jpg_err_mgr jerr;
183	guchar *data;	309	guchar *data;
184	int rs;	310	int rs;
185	FILE *fp;	311	FILE *fp;
186	volatile GdkPixbuf *pb = 0;	312	volatile GdkPixbuf *pb = 0;
		313
187	RETVAL = 0;	314	RETVAL = 0;
188		315
189	if (!(fp = fopen (path, "rb")))	316	fp = fopen (SvPVbyte_nolen (path), "rb");
		317
		318	if (!fp)
190	XSRETURN_UNDEF;	319	XSRETURN_UNDEF;
191		320
192	cinfo.err = jpeg_std_error (&jerr.err);	321	cinfo.err = jpeg_std_error (&jerr.err);
193		322
194	jerr.err.error_exit = cv_error_exit;	323	jerr.err.error_exit = cv_error_exit;
…		…
225	{	354	{
226	cinfo.dct_method = JDCT_FASTEST;	355	cinfo.dct_method = JDCT_FASTEST;
227	cinfo.do_fancy_upsampling = FALSE;	356	cinfo.do_fancy_upsampling = FALSE;
228		357
229	while (cinfo.scale_denom < 8	358	while (cinfo.scale_denom < 8
230	&& (cinfo.output_width >> 1) >= IW	359	&& cinfo.output_width >= IW*4
231	&& (cinfo.output_height >> 1) >= IH)	360	&& cinfo.output_height >= IH*4)
232	{	361	{
233	cinfo.scale_denom <<= 1;	362	cinfo.scale_denom <<= 1;
234	jpeg_calc_output_dimensions (&cinfo);	363	jpeg_calc_output_dimensions (&cinfo);
235	}	364	}
236	}	365	}
…		…
265	jpeg_destroy_decompress (&cinfo);	394	jpeg_destroy_decompress (&cinfo);
266	}	395	}
267	OUTPUT:	396	OUTPUT:
268	RETVAL	397	RETVAL
269		398
		399	void
		400	compare (GdkPixbuf a, GdkPixbuf b)
		401	PPCODE:
		402	{
		403	int w = gdk_pixbuf_get_width (a);
		404	int h = gdk_pixbuf_get_height (a);
		405	int sa = gdk_pixbuf_get_rowstride (a);
		406	int sb = gdk_pixbuf_get_rowstride (b);
		407
		408	guchar *pa = gdk_pixbuf_get_pixels (a);
		409	guchar *pb = gdk_pixbuf_get_pixels (b);
		410
		411	int x, y;
		412
		413	assert (w == gdk_pixbuf_get_width (b));
		414	assert (h == gdk_pixbuf_get_height (b));
		415
		416	assert (gdk_pixbuf_get_n_channels (a) == 3);
		417	assert (gdk_pixbuf_get_n_channels (b) == 3);
		418
		419	double diff = 0.;
		420	int peak = 0;
		421
		422	if (w && h)
		423	for (y = 0; y < h; y++)
		424	{
		425	guchar pa_ = pa + y sa;
		426	guchar pb_ = pb + y sb;
		427
		428	for (x = 0; x < w; x++)
		429	{
		430	int d;
		431
		432	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		433	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		434	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		435	}
		436	}
		437
		438	EXTEND (SP, 2);
		439	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		440	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		441	}
		442
270	#############################################################################	443	#############################################################################
271		444
272	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	445	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
		446
		447	# currently only works for filenames (octet strings)
273		448
274	SV *	449	SV *
275	foldcase (SV *pathsv)	450	foldcase (SV *pathsv)
276	PROTOTYPE: $	451	PROTOTYPE: $
277	CODE:	452	CODE:
278	{	453	{
279	STRLEN plen;	454	STRLEN plen;
280	U8 *path = SvPVutf8 (pathsv, plen);	455	U8 path = (U8 )SvPV (pathsv, plen);
281	U8 *pend = path + plen;	456	U8 *pend = path + plen;
282	U8 dst [plen * 6 * 3], *dstp = dst;	457	U8 dst [plen * 6 * 3], *dstp = dst;
283		458
284	while (path < pend)	459	while (path < pend)
285	{	460	{
286	U8 ch = *path;	461	U8 ch = *path;
287		462
288	if (ch >= 'a' && ch <= 'z')	463	if (ch >= 'a' && ch <= 'z')
289	dstp++ = path++;	464	dstp++ = path++;
		465	else if (ch >= 'A' && ch <= 'Z')
		466	dstp++ = path++ + ('a' - 'A');
290	else if (ch >= '0' && ch <= '9')	467	else if (ch >= '0' && ch <= '9')
291	{	468	{
292	STRLEN el, nl = 0;	469	STRLEN el, nl = 0;
293	while (path >= '0' && path <= '9' && path < pend)	470	while (path >= '0' && path <= '9' && path < pend)
294	path++, nl++;	471	path++, nl++;
…		…
297	*dstp++ = '0';	474	*dstp++ = '0';
298		475
299	memcpy (dstp, path - nl, nl);	476	memcpy (dstp, path - nl, nl);
300	dstp += nl;	477	dstp += nl;
301	}	478	}
		479	else
		480	dstp++ = path++;
		481	#if 0
302	else	482	else
303	{	483	{
304	STRLEN cl;	484	STRLEN cl;
305	to_utf8_fold (path, dstp, &cl);	485	to_utf8_fold (path, dstp, &cl);
306	dstp += cl;	486	dstp += cl;
307	path += is_utf8_char (path);	487	path += is_utf8_char (path);
308	}	488	}
		489	#endif
309	}	490	}
310		491
311	RETVAL = newSVpvn (dst, dstp - dst);	492	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
312	}	493	}
313	OUTPUT:	494	OUTPUT:
314	RETVAL	495	RETVAL
315		496
316	GdkPixbuf_noinc *	497	GdkPixbuf_noinc *
317	p7_to_pb (int w, int h, guchar *src)	498	p7_to_pb (int w, int h, SV *src_sv)
		499	PROTOTYPE: @
318	CODE:	500	CODE:
319	{	501	{
320	int x, y;	502	int x, y;
321	guchar dst, d;	503	guchar dst, d;
322	int dstr;	504	int dstr;
		505	guchar src = (guchar )SvPVbyte_nolen (src_sv);
323		506
324	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	507	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
325	dst = gdk_pixbuf_get_pixels (RETVAL);	508	dst = gdk_pixbuf_get_pixels (RETVAL);
326	dstr = gdk_pixbuf_get_rowstride (RETVAL);	509	dstr = gdk_pixbuf_get_rowstride (RETVAL);
327		510
…		…
336	}	519	}
337	}	520	}
338	OUTPUT:	521	OUTPUT:
339	RETVAL	522	RETVAL
340		523
		524	#############################################################################
		525
		526	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		527
		528	void
		529	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		530	CODE:
		531	{
		532	int w = gdk_pixbuf_get_width (pb);
		533	int h = gdk_pixbuf_get_height (pb);
		534	int x, y, i;
		535	guchar *dst;
		536	int bpp = gdk_pixbuf_get_n_channels (pb);
		537	guchar *src = gdk_pixbuf_get_pixels (pb);
		538	int sstr = gdk_pixbuf_get_rowstride (pb);
		539
		540	a85_init ();
		541
		542	for (y = 0; y < h; y++)
		543	for (x = 0; x < w; x++)
		544	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		545	a85_push (fp, src [x * bpp + y * sstr + i]);
		546
		547	a85_finish (fp);
		548	}
		549
		550	void
		551	dump_binary (PerlIO fp, GdkPixbuf pb)
		552	CODE:
		553	{
		554	int w = gdk_pixbuf_get_width (pb);
		555	int h = gdk_pixbuf_get_height (pb);
		556	int x, y, i;
		557	guchar *dst;
		558	int bpp = gdk_pixbuf_get_n_channels (pb);
		559	guchar *src = gdk_pixbuf_get_pixels (pb);
		560	int sstr = gdk_pixbuf_get_rowstride (pb);
		561
		562	for (y = 0; y < h; y++)
		563	for (x = 0; x < w; x++)
		564	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		565	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		566	}
		567
		568	#############################################################################
		569
		570	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		571
341	SV *	572	SV *
342	pb_to_p7 (GdkPixbuf *pb)	573	pb_to_hv84 (GdkPixbuf *pb)
343	CODE:	574	CODE:
344	{	575	{
345	int w = gdk_pixbuf_get_width (pb);	576	int w = gdk_pixbuf_get_width (pb);
346	int h = gdk_pixbuf_get_height (pb);	577	int h = gdk_pixbuf_get_height (pb);
347	int x, y;	578	int x, y;
348	guchar *dst;	579	guchar *dst;
349	int bpp = gdk_pixbuf_get_n_channels (pb);	580	int bpp = gdk_pixbuf_get_n_channels (pb);
350	guchar *src = gdk_pixbuf_get_pixels (pb);	581	guchar *src = gdk_pixbuf_get_pixels (pb);
351	int sstr = gdk_pixbuf_get_rowstride (pb);	582	int sstr = gdk_pixbuf_get_rowstride (pb);
352	int Er[IW], Eg[IW], Eb[IW];
353	int seed = 77;
354
355	RETVAL = newSV (w * h);
356	SvPOK_only (RETVAL);
357	SvCUR_set (RETVAL, w * h);
358
359	dst = SvPVX (RETVAL);
360
361	memset (Er, 0, sizeof (int) * IW);
362	memset (Eg, 0, sizeof (int) * IW);
363	memset (Eb, 0, sizeof (int) * IW);
364
365	/* some primitive error distribution + random dithering */
366
367	for (y = 0; y < h; y++)
368	{
369	int er = 0, eg = 0, eb = 0;
370
371	for (x = 0; x < w; x++)
372	{
373	int r, g, b;
374	guchar p = src + x bpp + y * sstr;
375
376	r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
377	g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
378	b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
379
380	r = r > 7 ? 7 : r < 0 ? 0 : r;
381	g = g > 7 ? 7 : g < 0 ? 0 : g;
382	b = b > 3 ? 3 : b < 0 ? 0 : b;
383
384	er += p[0] - (r * 255 + 4) / 7;
385	eg += p[1] - (g * 255 + 4) / 7;
386	eb += p[2] - (b * 255 + 2) / 3;
387
388	Er[x] = er >> 1; er -= (er + 1) >> 1;
389	Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
390	Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
391
392	*dst++ = r << 5 \| g << 2 \| b;
393	}
394	}
395	}
396	OUTPUT:
397	RETVAL
398
399	#############################################################################
400
401	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
402
403	void
404	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
405	CODE:
406	{
407	int w = gdk_pixbuf_get_width (pb);
408	int h = gdk_pixbuf_get_height (pb);
409	int x, y, i;
410	guchar *dst;
411	int bpp = gdk_pixbuf_get_n_channels (pb);
412	guchar *src = gdk_pixbuf_get_pixels (pb);
413	int sstr = gdk_pixbuf_get_rowstride (pb);
414
415	a85_init ();
416
417	for (y = 0; y < h; y++)
418	for (x = 0; x < w; x++)
419	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
420	a85_push (fp, src [x * bpp + y * sstr + i]);
421
422	a85_finish (fp);
423	}
424
425	void
426	dump_binary (PerlIO fp, GdkPixbuf pb)
427	CODE:
428	{
429	int w = gdk_pixbuf_get_width (pb);
430	int h = gdk_pixbuf_get_height (pb);
431	int x, y, i;
432	guchar *dst;
433	int bpp = gdk_pixbuf_get_n_channels (pb);
434	guchar *src = gdk_pixbuf_get_pixels (pb);
435	int sstr = gdk_pixbuf_get_rowstride (pb);
436
437	for (y = 0; y < h; y++)
438	for (x = 0; x < w; x++)
439	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
440	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
441	}
442
443	#############################################################################
444
445	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
446
447	SV *
448	pb_to_hv84 (GdkPixbuf *pb)
449	CODE:
450	{
451	int w = gdk_pixbuf_get_width (pb);
452	int h = gdk_pixbuf_get_height (pb);
453	int x, y;
454	guchar *dst;
455	int bpp = gdk_pixbuf_get_n_channels (pb);
456	guchar *src = gdk_pixbuf_get_pixels (pb);
457	int sstr = gdk_pixbuf_get_rowstride (pb);
458		583
459	RETVAL = newSV (6 * 8 * 12 / 8);	584	RETVAL = newSV (6 * 8 * 12 / 8);
460	SvPOK_only (RETVAL);	585	SvPOK_only (RETVAL);
461	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	586	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
462		587
463	dst = SvPVX (RETVAL);	588	dst = (guchar *)SvPVX (RETVAL);
464		589
465	/* some primitive error distribution + random dithering */	590	/* some primitive error distribution + random dithering */
466		591
467	for (y = 0; y < h; y++)	592	for (y = 0; y < h; y++)
468	{	593	{
…		…
531	#############################################################################	656	#############################################################################
532		657
533	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster	658	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
534		659
535	SV *	660	SV *
536	make_histograms (SV *ar)	661	extract_features (SV *ar)
537	CODE:	662	CODE:
538	{	663	{
539	int i;	664	int i;
540	AV av, result;	665	AV av, result;
541		666
542	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)	667	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
543	croak ("Not an array ref as first argument to make_histogram");	668	croak ("Not an array ref as first argument to extract_features");
544		669
545	av = (AV *) SvRV (ar);	670	av = (AV *) SvRV (ar);
546	result = newAV ();	671	result = newAV ();
547		672
548	for (i = 0; i <= av_len (av); ++i)	673	for (i = 0; i <= av_len (av); ++i)
549	{	674	{
550	const int HISTSIZE = 64;
551
552	int j;
553	SV sv = av_fetch (av, i, 1);	675	SV sv = av_fetch (av, i, 1);
554	STRLEN len;
555	char *buf = SvPVbyte (sv, len);
556
557	int tmphist[HISTSIZE];
558	float *hist;
559
560	SV histsv = newSV (HISTSIZE sizeof (float) + 1);	676	SV histsv = newSV (9 sizeof (float) + 1);
		677
561	SvPOK_on (histsv);	678	SvPOK_on (histsv);
562	SvCUR_set (histsv, HISTSIZE * sizeof (float));	679	SvCUR_set (histsv, 9 * sizeof (float));
563	hist = (float *)SvPVX (histsv);	680	float hist = (float )SvPVX (histsv);
564		681
565	Zero (tmphist, sizeof (tmphist), char);	682	struct feature f_h, f_s, f_v;
		683	feature_init (&f_h);
		684	feature_init (&f_s);
		685	feature_init (&f_v);
566		686
567	for (j = len; j--; )
568	{
569	unsigned int idx
570	= ((*buf & 0xc0) >> 2)
571	\| ((*buf & 0x18) >> 1)
572	\| (*buf & 0x03);
573
574	++tmphist[idx];
575	++buf;
576	}
577		687	{
578	for (j = 0; j < HISTSIZE; ++j)	688	STRLEN len;
579	hist[j] = (float)tmphist[j] / (len + 1e-30);	689	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		690	while (len >= 3)
		691	{
		692	unsigned int r, g, b, h, s, v;
		693	r = buf++; g = buf++; b = *buf++;
		694	rgb_to_hsv (r, g, b, &h, &s, &v);
		695
		696	feature_update_pass_1 (&f_h, h);
		697	feature_update_pass_1 (&f_s, s);
		698	feature_update_pass_1 (&f_v, v);
		699
		700	len -= 3;
		701	}
		702
		703	feature_finish_pass_1 (&f_h);
		704	feature_finish_pass_1 (&f_s);
		705	feature_finish_pass_1 (&f_v);
		706	}
		707
		708	{
		709	STRLEN len;
		710	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		711	while (len >= 3)
		712	{
		713	unsigned int r, g, b, h, s, v;
		714	r = buf++; g = buf++; b = *buf++;
		715	rgb_to_hsv (r, g, b, &h, &s, &v);
		716
		717	feature_update_pass_2 (&f_h, h);
		718	feature_update_pass_2 (&f_s, s);
		719	feature_update_pass_2 (&f_v, v);
		720
		721	len -= 3;
		722	}
		723
		724	feature_finish_pass_2 (&f_h);
		725	feature_finish_pass_2 (&f_s);
		726	feature_finish_pass_2 (&f_v);
		727	}
		728
		729	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		730	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		731	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
580		732
581	av_push (result, histsv);	733	av_push (result, histsv);
582	}	734	}
583		735
584	RETVAL = newRV_noinc ((SV *)result);	736	RETVAL = newRV_noinc ((SV *)result);
585	}	737	}
586	OUTPUT:	738	OUTPUT:
587	RETVAL	739	RETVAL
588		740
589

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Comparing CV/CV.xs (file contents): Revision 1.20 by root, Fri Jul 22 06:14:25 2005 UTC vs. Revision 1.42 by root, Sun Sep 14 12:47:59 2008 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.20 by root, Fri Jul 22 06:14:25 2005 UTC vs.
Revision 1.42 by root, Sun Sep 14 12:47:59 2008 UTC