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

Comparing CV/CV.xs (file contents):
Revision 1.17 by root, Wed Jul 20 06:20:36 2005 UTC vs.
Revision 1.41 by root, Sat Mar 1 04:11:26 2008 UTC

…		…
1	#include "EXTERN.h"	1	#include "EXTERN.h"
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
		5	#include <string.h>
5	#include <setjmp.h>	6	#include <setjmp.h>
		7	#include <math.h>
		8
		9	#include <magic.h>
6		10
7	#include <jpeglib.h>	11	#include <jpeglib.h>
		12	#include <glib.h>
		13	#include <gtk/gtk.h>
8	#include <gdk-pixbuf/gdk-pixbuf.h>	14	#include <gdk-pixbuf/gdk-pixbuf.h>
9		15
10	#include <gperl.h>	16	#include <gperl.h>
11	#include <gtk2perl.h>	17	#include <gtk2perl.h>
12		18
13	#define IW 80 /* MUST match Schnauer.pm! */	19	#define IW 80 /* MUST match Schnauzer.pm! */
14	#define IH 60 /* MUST match Schnauer.pm! */	20	#define IH 60 /* MUST match Schnauzer.pm! */
15		21
16	#define RAND (seed = (seed + 7141) * 54773 % 134456)	22	#define RAND (seed = (seed + 7141) * 54773 % 134456)
17		23
18	#define LINELENGTH 240	24	#define LINELENGTH 240
19		25
62		68
63	*h &= 255;	69	*h &= 255;
64	}	70	}
65	}	71	}
66		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
67	static guint32 a85_val;	128	static guint32 a85_val;
68	static guint a85_cnt;	129	static guint a85_cnt;
69	static guchar a85_buf[LINELENGTH], *a85_ptr;	130	static guchar a85_buf[LINELENGTH], *a85_ptr;
70		131
71	static void	132	static void
…		…
123		184
124	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	185	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
125		186
126	PROTOTYPES: ENABLE	187	PROTOTYPES: ENABLE
127		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/broken in Gtk2 perl module
		249
		250	void
		251	gdk_window_clear_hints (GdkWindow *window)
		252	CODE:
		253	gdk_window_set_geometry_hints (window, 0, 0);
		254
		255	gboolean
		256	gdk_net_wm_supports (GdkAtom property)
		257	CODE:
		258	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		259	RETVAL = gdk_net_wm_supports (property);
		260	#else
		261	RETVAL = 0;
		262	#endif
		263	OUTPUT:
		264	RETVAL
		265
128	GdkPixbuf_noinc *	266	GdkPixbuf_noinc *
129	transpose (GdkPixbuf *pb)	267	dealpha_expose (GdkPixbuf *pb)
130	CODE:	268	CODE:
131	{	269	{
132	int w = gdk_pixbuf_get_width (pb);	270	int w = gdk_pixbuf_get_width (pb);
133	int h = gdk_pixbuf_get_height (pb);	271	int h = gdk_pixbuf_get_height (pb);
134	int bpp = gdk_pixbuf_get_n_channels (pb);	272	int bpp = gdk_pixbuf_get_n_channels (pb);
135	int x, y, i;	273	int x, y, i;
136	guchar src = gdk_pixbuf_get_pixels (pb), dst;	274	guchar src = gdk_pixbuf_get_pixels (pb), dst;
137	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	275	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
138		276
139	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	277	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
140		278
141	dst = gdk_pixbuf_get_pixels (RETVAL);	279	dst = gdk_pixbuf_get_pixels (RETVAL);
142	dstr = gdk_pixbuf_get_rowstride (RETVAL);	280	dstr = gdk_pixbuf_get_rowstride (RETVAL);
143		281
144	for (y = 0; y < h; y++)
145	for (x = 0; x < w; x++)	282	for (x = 0; x < w; x++)
		283	for (y = 0; y < h; y++)
146	for (i = 0; i < bpp; i++)	284	for (i = 0; i < 3; i++)
147	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	285	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
148	}	286	}
149	OUTPUT:	287	OUTPUT:
150	RETVAL	288	RETVAL
151		289
152	GdkPixbuf_noinc *	290	GdkPixbuf_noinc *
153	flop (GdkPixbuf *pb)	291	rotate (GdkPixbuf *pb, int angle)
154	CODE:	292	CODE:
155	{	293	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
156	int w = gdk_pixbuf_get_width (pb);	294	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
157	int h = gdk_pixbuf_get_height (pb);	295	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
158	int bpp = gdk_pixbuf_get_n_channels (pb);	296	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
159	int x, y, i;	297	: angle);
160	guchar src = gdk_pixbuf_get_pixels (pb), dst;
161	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
162
163	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);
164
165	dst = gdk_pixbuf_get_pixels (RETVAL);
166	dstr = gdk_pixbuf_get_rowstride (RETVAL);
167
168	for (y = 0; y < h; y++)
169	for (x = 0; x < w; x++)
170	for (i = 0; i < bpp; i++)
171	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
172	}
173	OUTPUT:	298	OUTPUT:
174	RETVAL	299	RETVAL
175		300
176	GdkPixbuf_noinc *	301	GdkPixbuf_noinc *
177	load_jpeg (char *path, int thumbnail=0)	302	load_jpeg (SV *path, int thumbnail=0)
178	CODE:	303	CODE:
179	{	304	{
180	struct jpeg_decompress_struct cinfo;	305	struct jpeg_decompress_struct cinfo;
181	struct jpg_err_mgr jerr;	306	struct jpg_err_mgr jerr;
182	guchar *data;	307	guchar *data;
183	int rs;	308	int rs;
184	FILE *fp;	309	FILE *fp;
185	volatile GdkPixbuf *pb = 0;	310	volatile GdkPixbuf *pb = 0;
		311
186	RETVAL = 0;	312	RETVAL = 0;
187		313
188	if (!(fp = fopen (path, "rb")))	314	fp = fopen (SvPVbyte_nolen (path), "rb");
		315
		316	if (!fp)
189	XSRETURN_UNDEF;	317	XSRETURN_UNDEF;
190		318
191	cinfo.err = jpeg_std_error (&jerr.err);	319	cinfo.err = jpeg_std_error (&jerr.err);
192		320
193	jerr.err.error_exit = cv_error_exit;	321	jerr.err.error_exit = cv_error_exit;
…		…
224	{	352	{
225	cinfo.dct_method = JDCT_FASTEST;	353	cinfo.dct_method = JDCT_FASTEST;
226	cinfo.do_fancy_upsampling = FALSE;	354	cinfo.do_fancy_upsampling = FALSE;
227		355
228	while (cinfo.scale_denom < 8	356	while (cinfo.scale_denom < 8
229	&& (cinfo.output_width >> 1) >= IW	357	&& cinfo.output_width >= IW*4
230	&& (cinfo.output_height >> 1) >= IH)	358	&& cinfo.output_height >= IH*4)
231	{	359	{
232	cinfo.scale_denom <<= 1;	360	cinfo.scale_denom <<= 1;
233	jpeg_calc_output_dimensions (&cinfo);	361	jpeg_calc_output_dimensions (&cinfo);
234	}	362	}
235	}	363	}
…		…
264	jpeg_destroy_decompress (&cinfo);	392	jpeg_destroy_decompress (&cinfo);
265	}	393	}
266	OUTPUT:	394	OUTPUT:
267	RETVAL	395	RETVAL
268		396
		397	void
		398	compare (GdkPixbuf a, GdkPixbuf b)
		399	PPCODE:
		400	{
		401	int w = gdk_pixbuf_get_width (a);
		402	int h = gdk_pixbuf_get_height (a);
		403	int sa = gdk_pixbuf_get_rowstride (a);
		404	int sb = gdk_pixbuf_get_rowstride (b);
		405
		406	guchar *pa = gdk_pixbuf_get_pixels (a);
		407	guchar *pb = gdk_pixbuf_get_pixels (b);
		408
		409	int x, y;
		410
		411	assert (w == gdk_pixbuf_get_width (b));
		412	assert (h == gdk_pixbuf_get_height (b));
		413
		414	assert (gdk_pixbuf_get_n_channels (a) == 3);
		415	assert (gdk_pixbuf_get_n_channels (b) == 3);
		416
		417	double diff = 0.;
		418	int peak = 0;
		419
		420	if (w && h)
		421	for (y = 0; y < h; y++)
		422	{
		423	guchar pa_ = pa + y sa;
		424	guchar pb_ = pb + y sb;
		425
		426	for (x = 0; x < w; x++)
		427	{
		428	int d;
		429
		430	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		431	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		432	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		433	}
		434	}
		435
		436	EXTEND (SP, 2);
		437	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		438	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		439	}
		440
269	#############################################################################	441	#############################################################################
270		442
271	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	443	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
272		444
		445	# currently only works for filenames (octet strings)
		446
		447	SV *
		448	foldcase (SV *pathsv)
		449	PROTOTYPE: $
		450	CODE:
		451	{
		452	STRLEN plen;
		453	U8 path = (U8 )SvPV (pathsv, plen);
		454	U8 *pend = path + plen;
		455	U8 dst [plen * 6 * 3], *dstp = dst;
		456
		457	while (path < pend)
		458	{
		459	U8 ch = *path;
		460
		461	if (ch >= 'a' && ch <= 'z')
		462	dstp++ = path++;
		463	else if (ch >= 'A' && ch <= 'Z')
		464	dstp++ = path++ + ('a' - 'A');
		465	else if (ch >= '0' && ch <= '9')
		466	{
		467	STRLEN el, nl = 0;
		468	while (path >= '0' && path <= '9' && path < pend)
		469	path++, nl++;
		470
		471	for (el = nl; el < 6; el++)
		472	*dstp++ = '0';
		473
		474	memcpy (dstp, path - nl, nl);
		475	dstp += nl;
		476	}
		477	else
		478	dstp++ = path++;
		479	#if 0
		480	else
		481	{
		482	STRLEN cl;
		483	to_utf8_fold (path, dstp, &cl);
		484	dstp += cl;
		485	path += is_utf8_char (path);
		486	}
		487	#endif
		488	}
		489
		490	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		491	}
		492	OUTPUT:
		493	RETVAL
		494
273	GdkPixbuf_noinc *	495	GdkPixbuf_noinc *
274	p7_to_pb (int w, int h, guchar *src)	496	p7_to_pb (int w, int h, SV *src_sv)
		497	PROTOTYPE: @
275	CODE:	498	CODE:
276	{	499	{
277	int x, y;	500	int x, y;
278	guchar dst, d;	501	guchar dst, d;
279	int dstr;	502	int dstr;
		503	guchar src = (guchar )SvPVbyte_nolen (src_sv);
280		504
281	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	505	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
282	dst = gdk_pixbuf_get_pixels (RETVAL);	506	dst = gdk_pixbuf_get_pixels (RETVAL);
283	dstr = gdk_pixbuf_get_rowstride (RETVAL);	507	dstr = gdk_pixbuf_get_rowstride (RETVAL);
284		508
…		…
293	}	517	}
294	}	518	}
295	OUTPUT:	519	OUTPUT:
296	RETVAL	520	RETVAL
297		521
		522	#############################################################################
		523
		524	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		525
		526	void
		527	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		528	CODE:
		529	{
		530	int w = gdk_pixbuf_get_width (pb);
		531	int h = gdk_pixbuf_get_height (pb);
		532	int x, y, i;
		533	guchar *dst;
		534	int bpp = gdk_pixbuf_get_n_channels (pb);
		535	guchar *src = gdk_pixbuf_get_pixels (pb);
		536	int sstr = gdk_pixbuf_get_rowstride (pb);
		537
		538	a85_init ();
		539
		540	for (y = 0; y < h; y++)
		541	for (x = 0; x < w; x++)
		542	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		543	a85_push (fp, src [x * bpp + y * sstr + i]);
		544
		545	a85_finish (fp);
		546	}
		547
		548	void
		549	dump_binary (PerlIO fp, GdkPixbuf pb)
		550	CODE:
		551	{
		552	int w = gdk_pixbuf_get_width (pb);
		553	int h = gdk_pixbuf_get_height (pb);
		554	int x, y, i;
		555	guchar *dst;
		556	int bpp = gdk_pixbuf_get_n_channels (pb);
		557	guchar *src = gdk_pixbuf_get_pixels (pb);
		558	int sstr = gdk_pixbuf_get_rowstride (pb);
		559
		560	for (y = 0; y < h; y++)
		561	for (x = 0; x < w; x++)
		562	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		563	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		564	}
		565
		566	#############################################################################
		567
		568	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		569
298	SV *	570	SV *
299	pb_to_p7 (GdkPixbuf *pb)	571	pb_to_hv84 (GdkPixbuf *pb)
300	CODE:	572	CODE:
301	{	573	{
302	int w = gdk_pixbuf_get_width (pb);	574	int w = gdk_pixbuf_get_width (pb);
303	int h = gdk_pixbuf_get_height (pb);	575	int h = gdk_pixbuf_get_height (pb);
304	int x, y;	576	int x, y;
305	guchar *dst;	577	guchar *dst;
306	int bpp = gdk_pixbuf_get_n_channels (pb);	578	int bpp = gdk_pixbuf_get_n_channels (pb);
307	guchar *src = gdk_pixbuf_get_pixels (pb);	579	guchar *src = gdk_pixbuf_get_pixels (pb);
308	int sstr = gdk_pixbuf_get_rowstride (pb);	580	int sstr = gdk_pixbuf_get_rowstride (pb);
309	int Er[IW], Eg[IW], Eb[IW];
310	int seed = 77;
311
312	RETVAL = newSV (w * h);
313	SvPOK_only (RETVAL);
314	SvCUR_set (RETVAL, w * h);
315
316	dst = SvPVX (RETVAL);
317
318	memset (Er, 0, sizeof (int) * IW);
319	memset (Eg, 0, sizeof (int) * IW);
320	memset (Eb, 0, sizeof (int) * IW);
321
322	/* some primitive error distribution + random dithering */
323
324	for (y = 0; y < h; y++)
325	{
326	int er = 0, eg = 0, eb = 0;
327
328	for (x = 0; x < w; x++)
329	{
330	int r, g, b;
331	guchar p = src + x bpp + y * sstr;
332
333	r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
334	g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
335	b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
336
337	r = r > 7 ? 7 : r < 0 ? 0 : r;
338	g = g > 7 ? 7 : g < 0 ? 0 : g;
339	b = b > 3 ? 3 : b < 0 ? 0 : b;
340
341	er += p[0] - (r * 255 + 4) / 7;
342	eg += p[1] - (g * 255 + 4) / 7;
343	eb += p[2] - (b * 255 + 2) / 3;
344
345	Er[x] = er >> 1; er -= (er + 1) >> 1;
346	Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
347	Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
348
349	*dst++ = r << 5 \| g << 2 \| b;
350	}
351	}
352	}
353	OUTPUT:
354	RETVAL
355
356	SV *
357	make_histogram (SV *ar)
358	CODE:
359	{
360	int i;
361	AV av, result;
362
363	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
364	croak ("Not an array ref as first argument to make_histogram");
365
366	av = (AV *) SvRV (ar);
367	result = newAV ();
368
369	for (i = 0; i <= av_len (av); ++i)
370	{
371	const int HISTSIZE = 64;
372
373	int j;
374	SV sv = av_fetch (av, i, 1);
375	STRLEN len;
376	char *buf = SvPVbyte (sv, len);
377
378	int tmphist[HISTSIZE];
379	float *hist;
380
381	SV histsv = newSV (HISTSIZE sizeof (float) + 1);
382	SvPOK_on (histsv);
383	SvCUR_set (histsv, HISTSIZE * sizeof (float));
384	hist = (float *)SvPVX (histsv);
385
386	Zero (tmphist, sizeof (tmphist), char);
387
388	for (j = len; j--; )
389	{
390	unsigned int idx
391	= ((*buf & 0xc0) >> 2)
392	\| ((*buf & 0x18) >> 1)
393	\| (*buf & 0x03);
394
395	++tmphist[idx];
396	++buf;
397	}
398
399	for (j = 0; j < HISTSIZE; ++j)
400	hist[j] = (float)tmphist[j] / (len + 1e-30);
401
402	av_push (result, histsv);
403	}
404
405	RETVAL = newRV_noinc ((SV *)result);
406	}
407	OUTPUT:
408	RETVAL
409
410	#############################################################################
411
412	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
413
414	void
415	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
416	CODE:
417	{
418	int w = gdk_pixbuf_get_width (pb);
419	int h = gdk_pixbuf_get_height (pb);
420	int x, y, i;
421	guchar *dst;
422	int bpp = gdk_pixbuf_get_n_channels (pb);
423	guchar *src = gdk_pixbuf_get_pixels (pb);
424	int sstr = gdk_pixbuf_get_rowstride (pb);
425
426	a85_init ();
427
428	for (y = 0; y < h; y++)
429	for (x = 0; x < w; x++)
430	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
431	a85_push (fp, src [x * bpp + y * sstr + i]);
432
433	a85_finish (fp);
434	}
435
436	void
437	dump_binary (PerlIO fp, GdkPixbuf pb)
438	CODE:
439	{
440	int w = gdk_pixbuf_get_width (pb);
441	int h = gdk_pixbuf_get_height (pb);
442	int x, y, i;
443	guchar *dst;
444	int bpp = gdk_pixbuf_get_n_channels (pb);
445	guchar *src = gdk_pixbuf_get_pixels (pb);
446	int sstr = gdk_pixbuf_get_rowstride (pb);
447
448	for (y = 0; y < h; y++)
449	for (x = 0; x < w; x++)
450	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
451	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
452	}
453
454	#############################################################################
455
456	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
457
458	SV *
459	pb_to_hv84 (GdkPixbuf *pb)
460	CODE:
461	{
462	int w = gdk_pixbuf_get_width (pb);
463	int h = gdk_pixbuf_get_height (pb);
464	int x, y;
465	guchar *dst;
466	int bpp = gdk_pixbuf_get_n_channels (pb);
467	guchar *src = gdk_pixbuf_get_pixels (pb);
468	int sstr = gdk_pixbuf_get_rowstride (pb);
469		581
470	RETVAL = newSV (6 * 8 * 12 / 8);	582	RETVAL = newSV (6 * 8 * 12 / 8);
471	SvPOK_only (RETVAL);	583	SvPOK_only (RETVAL);
472	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	584	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
473		585
474	dst = SvPVX (RETVAL);	586	dst = (guchar *)SvPVX (RETVAL);
475		587
476	/* some primitive error distribution + random dithering */	588	/* some primitive error distribution + random dithering */
477		589
478	for (y = 0; y < h; y++)	590	for (y = 0; y < h; y++)
479	{	591	{
…		…
537	}	649	}
538	}	650	}
539	OUTPUT:	651	OUTPUT:
540	RETVAL	652	RETVAL
541		653
		654	#############################################################################
542		655
		656	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
543		657
		658	SV *
		659	extract_features (SV *ar)
		660	CODE:
		661	{
		662	int i;
		663	AV av, result;
		664
		665	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		666	croak ("Not an array ref as first argument to extract_features");
		667
		668	av = (AV *) SvRV (ar);
		669	result = newAV ();
		670
		671	for (i = 0; i <= av_len (av); ++i)
		672	{
		673	SV sv = av_fetch (av, i, 1);
		674	SV histsv = newSV (9 sizeof (float) + 1);
		675
		676	SvPOK_on (histsv);
		677	SvCUR_set (histsv, 9 * sizeof (float));
		678	float hist = (float )SvPVX (histsv);
		679
		680	struct feature f_h, f_s, f_v;
		681	feature_init (&f_h);
		682	feature_init (&f_s);
		683	feature_init (&f_v);
		684
		685	{
		686	STRLEN len;
		687	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		688	while (len >= 3)
		689	{
		690	unsigned int r, g, b, h, s, v;
		691	r = buf++; g = buf++; b = *buf++;
		692	rgb_to_hsv (r, g, b, &h, &s, &v);
		693
		694	feature_update_pass_1 (&f_h, h);
		695	feature_update_pass_1 (&f_s, s);
		696	feature_update_pass_1 (&f_v, v);
		697
		698	len -= 3;
		699	}
		700
		701	feature_finish_pass_1 (&f_h);
		702	feature_finish_pass_1 (&f_s);
		703	feature_finish_pass_1 (&f_v);
		704	}
		705
		706	{
		707	STRLEN len;
		708	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		709	while (len >= 3)
		710	{
		711	unsigned int r, g, b, h, s, v;
		712	r = buf++; g = buf++; b = *buf++;
		713	rgb_to_hsv (r, g, b, &h, &s, &v);
		714
		715	feature_update_pass_2 (&f_h, h);
		716	feature_update_pass_2 (&f_s, s);
		717	feature_update_pass_2 (&f_v, v);
		718
		719	len -= 3;
		720	}
		721
		722	feature_finish_pass_2 (&f_h);
		723	feature_finish_pass_2 (&f_s);
		724	feature_finish_pass_2 (&f_v);
		725	}
		726
		727	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		728	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		729	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
		730
		731	av_push (result, histsv);
		732	}
		733
		734	RETVAL = newRV_noinc ((SV *)result);
		735	}
		736	OUTPUT:
		737	RETVAL
		738

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Comparing CV/CV.xs (file contents): Revision 1.17 by root, Wed Jul 20 06:20:36 2005 UTC vs. Revision 1.41 by root, Sat Mar 1 04:11:26 2008 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.17 by root, Wed Jul 20 06:20:36 2005 UTC vs.
Revision 1.41 by root, Sat Mar 1 04:11:26 2008 UTC