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

Comparing CV/CV.xs (file contents):
Revision 1.6 by root, Wed Nov 12 00:59:01 2003 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>
		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>
5	#include <gdk-pixbuf/gdk-pixbuf.h>	14	#include <gdk-pixbuf/gdk-pixbuf.h>
6		15
7	#include <gperl.h>	16	#include <gperl.h>
8	#include <gtk2perl.h>	17	#include <gtk2perl.h>
9		18
10	#define IW 80	19	#define IW 80 /* MUST match Schnauzer.pm! */
		20	#define IH 60 /* MUST match Schnauzer.pm! */
11		21
12	#define RAND (seed = (seed + 7141) * 54773 % 134456)	22	#define RAND (seed = (seed + 7141) * 54773 % 134456)
13		23
		24	#define LINELENGTH 240
		25
14	#define ELLIPSIS "\xe2\x80\xa6"	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	}
15		127
16	static guint32 a85_val;	128	static guint32 a85_val;
17	static guint a85_cnt;	129	static guint a85_cnt;
18	static guchar a85_buf[80], *a85_ptr;	130	static guchar a85_buf[LINELENGTH], *a85_ptr;
19		131
20	static void	132	static void
21	a85_init (void)	133	a85_init (void)
22	{	134	{
23	a85_cnt = 4;	135	a85_cnt = 4;
53	}	165	}
54	}	166	}
55		167
56	}	168	}
57		169
		170	static void
58	a85_finish (PerlIO *fp)	171	a85_finish (PerlIO *fp)
59	{	172	{
60	while (a85_cnt != 4)	173	while (a85_cnt != 4)
61	a85_push (fp, 0);	174	a85_push (fp, 0);
62		175
…		…
67	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	180	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
68	}	181	}
69		182
70	/////////////////////////////////////////////////////////////////////////////	183	/////////////////////////////////////////////////////////////////////////////
71		184
72	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow	185	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
73		186
74	PROTOTYPES: ENABLE	187	PROTOTYPES: ENABLE
75		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
76	GdkPixbuf_noinc *	266	GdkPixbuf_noinc *
77	transpose (GdkPixbuf *pb)	267	dealpha_expose (GdkPixbuf *pb)
78	CODE:	268	CODE:
79	{	269	{
80	int w = gdk_pixbuf_get_width (pb);	270	int w = gdk_pixbuf_get_width (pb);
81	int h = gdk_pixbuf_get_height (pb);	271	int h = gdk_pixbuf_get_height (pb);
82	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;	272	int bpp = gdk_pixbuf_get_n_channels (pb);
83	int x, y, i;	273	int x, y, i;
84	guchar src = gdk_pixbuf_get_pixels (pb), dst;	274	guchar src = gdk_pixbuf_get_pixels (pb), dst;
85	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	275	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
86		276
87	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	277	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
88		278
89	dst = gdk_pixbuf_get_pixels (RETVAL);	279	dst = gdk_pixbuf_get_pixels (RETVAL);
90	dstr = gdk_pixbuf_get_rowstride (RETVAL);	280	dstr = gdk_pixbuf_get_rowstride (RETVAL);
91		281
92	for (y = 0; y < h; y++)
93	for (x = 0; x < w; x++)	282	for (x = 0; x < w; x++)
		283	for (y = 0; y < h; y++)
94	for (i = 0; i < bpp; i++)	284	for (i = 0; i < 3; i++)
95	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];
96	}	286	}
97	OUTPUT:	287	OUTPUT:
98	RETVAL	288	RETVAL
99		289
100	GdkPixbuf_noinc *	290	GdkPixbuf_noinc *
101	flop (GdkPixbuf *pb)	291	rotate (GdkPixbuf *pb, int angle)
102	CODE:	292	CODE:
103	{	293	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
104	int w = gdk_pixbuf_get_width (pb);	294	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
105	int h = gdk_pixbuf_get_height (pb);	295	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
106	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;	296	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
107	int x, y, i;	297	: angle);
108	guchar src = gdk_pixbuf_get_pixels (pb), dst;	298	OUTPUT:
109	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	299	RETVAL
110		300
111	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	301	GdkPixbuf_noinc *
		302	load_jpeg (SV *path, int thumbnail=0)
		303	CODE:
		304	{
		305	struct jpeg_decompress_struct cinfo;
		306	struct jpg_err_mgr jerr;
		307	guchar *data;
		308	int rs;
		309	FILE *fp;
		310	volatile GdkPixbuf *pb = 0;
112		311
		312	RETVAL = 0;
		313
		314	fp = fopen (SvPVbyte_nolen (path), "rb");
		315
		316	if (!fp)
		317	XSRETURN_UNDEF;
		318
		319	cinfo.err = jpeg_std_error (&jerr.err);
		320
		321	jerr.err.error_exit = cv_error_exit;
		322	jerr.err.output_message = cv_error_output;
		323
		324	if ((rs = setjmp (jerr.setjmp_buffer)))
		325	{
		326	fclose (fp);
		327	jpeg_destroy_decompress (&cinfo);
		328
		329	if (pb)
		330	g_object_unref ((gpointer)pb);
		331
		332	XSRETURN_UNDEF;
		333	}
		334
		335	jpeg_create_decompress (&cinfo);
		336
		337	jpeg_stdio_src (&cinfo, fp);
		338	jpeg_read_header (&cinfo, TRUE);
		339
		340	cinfo.dct_method = JDCT_DEFAULT;
		341	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
		342	cinfo.do_block_smoothing = FALSE;
		343	cinfo.out_color_space = JCS_RGB;
		344	cinfo.quantize_colors = FALSE;
		345
		346	cinfo.scale_num = 1;
		347	cinfo.scale_denom = 1;
		348
		349	jpeg_calc_output_dimensions (&cinfo);
		350
		351	if (thumbnail)
		352	{
		353	cinfo.dct_method = JDCT_FASTEST;
		354	cinfo.do_fancy_upsampling = FALSE;
		355
		356	while (cinfo.scale_denom < 8
		357	&& cinfo.output_width >= IW*4
		358	&& cinfo.output_height >= IH*4)
		359	{
		360	cinfo.scale_denom <<= 1;
		361	jpeg_calc_output_dimensions (&cinfo);
		362	}
		363	}
		364
		365	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
		366	if (!RETVAL)
		367	longjmp (jerr.setjmp_buffer, 2);
		368
113	dst = gdk_pixbuf_get_pixels (RETVAL);	369	data = gdk_pixbuf_get_pixels (RETVAL);
114	dstr = gdk_pixbuf_get_rowstride (RETVAL);	370	rs = gdk_pixbuf_get_rowstride (RETVAL);
115		371
		372	if (cinfo.output_components != 3)
		373	longjmp (jerr.setjmp_buffer, 3);
		374
		375	jpeg_start_decompress (&cinfo);
		376
		377	while (cinfo.output_scanline < cinfo.output_height)
		378	{
		379	int remaining = cinfo.output_height - cinfo.output_scanline;
		380	JSAMPROW rp[4];
		381
		382	rp [0] = data + cinfo.output_scanline * rs;
		383	rp [1] = (guchar *)rp [0] + rs;
		384	rp [2] = (guchar *)rp [1] + rs;
		385	rp [3] = (guchar *)rp [2] + rs;
		386
		387	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
		388	}
		389
		390	jpeg_finish_decompress (&cinfo);
		391	fclose (fp);
		392	jpeg_destroy_decompress (&cinfo);
		393	}
		394	OUTPUT:
		395	RETVAL
		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)
116	for (y = 0; y < h; y++)	421	for (y = 0; y < h; y++)
		422	{
		423	guchar pa_ = pa + y sa;
		424	guchar pb_ = pb + y sb;
		425
117	for (x = 0; x < w; x++)	426	for (x = 0; x < w; x++)
118	for (i = 0; i < bpp; i++)	427	{
119	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];	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.)));
120	}	439	}
121	OUTPUT:
122	RETVAL
123		440
124	#############################################################################	441	#############################################################################
125		442
126	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	443	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
127		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
128	GdkPixbuf_noinc *	495	GdkPixbuf_noinc *
129	p7_to_pb (int w, int h, guchar *src)	496	p7_to_pb (int w, int h, SV *src_sv)
		497	PROTOTYPE: @
130	CODE:	498	CODE:
131	{	499	{
132	int x, y;	500	int x, y;
133	guchar dst, d;	501	guchar dst, d;
134	int dstr;	502	int dstr;
		503	guchar src = (guchar )SvPVbyte_nolen (src_sv);
135		504
136	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	505	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
137	dst = gdk_pixbuf_get_pixels (RETVAL);	506	dst = gdk_pixbuf_get_pixels (RETVAL);
138	dstr = gdk_pixbuf_get_rowstride (RETVAL);	507	dstr = gdk_pixbuf_get_rowstride (RETVAL);
139		508
…		…
148	}	517	}
149	}	518	}
150	OUTPUT:	519	OUTPUT:
151	RETVAL	520	RETVAL
152		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
153	SV *	570	SV *
154	pb_to_p7 (GdkPixbuf *pb)	571	pb_to_hv84 (GdkPixbuf *pb)
155	CODE:	572	CODE:
156	{	573	{
157	int w = gdk_pixbuf_get_width (pb);	574	int w = gdk_pixbuf_get_width (pb);
158	int h = gdk_pixbuf_get_height (pb);	575	int h = gdk_pixbuf_get_height (pb);
159	int x, y;	576	int x, y;
160	guchar *dst;	577	guchar *dst;
161	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;	578	int bpp = gdk_pixbuf_get_n_channels (pb);
162	guchar *src = gdk_pixbuf_get_pixels (pb);	579	guchar *src = gdk_pixbuf_get_pixels (pb);
163	int sstr = gdk_pixbuf_get_rowstride (pb);	580	int sstr = gdk_pixbuf_get_rowstride (pb);
164	int Er[IW], Eg[IW], Eb[IW];
165	int seed = 77;
166		581
167	RETVAL = newSV (w * h);	582	RETVAL = newSV (6 * 8 * 12 / 8);
168	SvPOK_only (RETVAL);	583	SvPOK_only (RETVAL);
169	SvCUR_set (RETVAL, w * h);	584	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
170		585
171	dst = SvPVX (RETVAL);	586	dst = (guchar *)SvPVX (RETVAL);
172
173	memset (Er, 0, sizeof (int) * IW);
174	memset (Eg, 0, sizeof (int) * IW);
175	memset (Eb, 0, sizeof (int) * IW);
176		587
177	/* some primitive error distribution + random dithering */	588	/* some primitive error distribution + random dithering */
178		589
179	for (y = 0; y < h; y++)	590	for (y = 0; y < h; y++)
180	{	591	{
181	int er = 0, eg = 0, eb = 0;	592	guchar p = src + y sstr;
182		593
183	for (x = 0; x < w; x++)	594	for (x = 0; x < w; x += 2)
184	{	595	{
185	int r, g, b;	596	unsigned int r, g, b, h, s, v, H, V1, V2;
186	guchar p = src + x bpp + y * sstr;
187		597
188	r = ((p[0] + er + Er[x]) * 7 + 128) / 255;	598	if (bpp == 3)
189	g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;	599	r = p++, g = p++, b = *p++;
190	b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;	600	else if (bpp == 1)
		601	r = g = b = *p++;
		602	else
		603	abort ();
191		604
192	r = r > 7 ? 7 : r < 0 ? 0 : r;	605	rgb_to_hsv (r, g, b, &h, &s, &v);
193	g = g > 7 ? 7 : g < 0 ? 0 : g;
194	b = b > 3 ? 3 : b < 0 ? 0 : b;
195		606
196	er += p[0] - (r * 255 + 4) / 7;	607	H = (h * 15 / 255) << 4;
197	eg += p[1] - (g * 255 + 4) / 7;	608	V1 = v;
198	eb += p[2] - (b * 255 + 2) / 3;
199		609
200	Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;	610	if (bpp == 3)
201	Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;	611	r = p++, g = p++, b = *p++;
202	Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;	612	else if (bpp == 1)
		613	r = g = b = *p++;
		614	else
		615	abort ();
203		616
204	*dst++ = r << 5 \| g << 2 \| b;	617	rgb_to_hsv (r, g, b, &h, &s, &v);
		618
		619	H \|= h * 15 / 255;
		620	V2 = v;
		621
		622	*dst++ = H;
		623	*dst++ = V1;
		624	*dst++ = V2;
205	}	625	}
206	}	626	}
207	}	627	}
208	OUTPUT:	628	OUTPUT:
209	RETVAL	629	RETVAL
210		630
		631	SV *
		632	hv84_to_av (unsigned char *hv84)
		633	CODE:
		634	{
		635	int i = 72 / 3;
		636	AV *av = newAV ();
		637
		638	RETVAL = (SV )newRV_noinc ((SV )av);
		639	while (i--)
		640	{
		641	int h = *hv84++;
		642	int v1 = *hv84++;
		643	int v2 = *hv84++;
		644
		645	av_push (av, newSViv (v1));
		646	av_push (av, newSViv ((h >> 4) * 255 / 15));
		647	av_push (av, newSViv (v2));
		648	av_push (av, newSViv ((h & 15) * 255 / 15));
		649	}
		650	}
		651	OUTPUT:
		652	RETVAL
		653
211	#############################################################################	654	#############################################################################
212		655
213	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript	656	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
214		657
215	void	658	SV *
216	dump_pb (PerlIO fp, GdkPixbuf pb)	659	extract_features (SV *ar)
217	CODE:	660	CODE:
218	{	661	{
219	int w = gdk_pixbuf_get_width (pb);	662	int i;
220	int h = gdk_pixbuf_get_height (pb);	663	AV av, result;
221	int x, y, i;
222	guchar *dst;
223	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;
224	guchar *src = gdk_pixbuf_get_pixels (pb);
225	int sstr = gdk_pixbuf_get_rowstride (pb);
226		664
227	a85_init ();	665	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		666	croak ("Not an array ref as first argument to extract_features");
228		667
229	for (y = 0; y < h; y++)	668	av = (AV *) SvRV (ar);
230	for (x = 0; x < w; x++)	669	result = newAV ();
231	for (i = 0; i < 3; i++)
232	a85_push (fp, src [x * bpp + y * sstr + i]);
233		670
234	a85_finish (fp);	671	for (i = 0; i <= av_len (av); ++i)
235	}	672	{
		673	SV sv = av_fetch (av, i, 1);
		674	SV histsv = newSV (9 sizeof (float) + 1);
236		675
		676	SvPOK_on (histsv);
		677	SvCUR_set (histsv, 9 * sizeof (float));
		678	float hist = (float )SvPVX (histsv);
237		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);
238		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);
239		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 1.6 by root, Wed Nov 12 00:59:01 2003 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 1.6 by root, Wed Nov 12 00:59:01 2003 UTC vs.
Revision 1.41 by root, Sat Mar 1 04:11:26 2008 UTC