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

Comparing CV/CV.xs (file contents):
Revision 1.12 by root, Tue Feb 8 11:00:11 2005 UTC vs.
Revision 1.40 by root, Sat Nov 25 15:00:51 2006 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
14	#define LINELENGTH 240	24	#define LINELENGTH 240
15		25
16	#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	}
17		127
18	static guint32 a85_val;	128	static guint32 a85_val;
19	static guint a85_cnt;	129	static guint a85_cnt;
20	static guchar a85_buf[LINELENGTH], *a85_ptr;	130	static guchar a85_buf[LINELENGTH], *a85_ptr;
21		131
68	*a85_ptr++ = '\n';	178	*a85_ptr++ = '\n';
69		179
70	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	180	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
71	}	181	}
72		182
73	static void
74	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
75	unsigned int h, unsigned int s, unsigned int *v)
76	{
77	unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
78	unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
79	unsigned int delta = mx - mn;
80
81	*v = mx;
82
83	s = mx ? delta 255 / mx : 0;
84
85	if (delta == 0)
86	*h = 0;
87	else
88	{
89	if (r == mx)
90	h = ((int)g - (int)b) 255 / (int)(delta * 3);
91	else if (g == mx)
92	h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
93	else if (b == mx)
94	h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
95
96	*h &= 255;
97	}
98	}
99
100	/////////////////////////////////////////////////////////////////////////////	183	/////////////////////////////////////////////////////////////////////////////
101		184
102	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	185	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
103		186
104	PROTOTYPES: ENABLE	187	PROTOTYPES: ENABLE
105		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
106	GdkPixbuf_noinc *	266	GdkPixbuf_noinc *
107	transpose (GdkPixbuf *pb)	267	dealpha_expose (GdkPixbuf *pb)
108	CODE:	268	CODE:
109	{	269	{
110	int w = gdk_pixbuf_get_width (pb);	270	int w = gdk_pixbuf_get_width (pb);
111	int h = gdk_pixbuf_get_height (pb);	271	int h = gdk_pixbuf_get_height (pb);
112	int bpp = gdk_pixbuf_get_n_channels (pb);	272	int bpp = gdk_pixbuf_get_n_channels (pb);
113	int x, y, i;	273	int x, y, i;
114	guchar src = gdk_pixbuf_get_pixels (pb), dst;	274	guchar src = gdk_pixbuf_get_pixels (pb), dst;
115	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	275	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
116		276
117	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	277	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
118		278
119	dst = gdk_pixbuf_get_pixels (RETVAL);	279	dst = gdk_pixbuf_get_pixels (RETVAL);
120	dstr = gdk_pixbuf_get_rowstride (RETVAL);	280	dstr = gdk_pixbuf_get_rowstride (RETVAL);
121		281
122	for (y = 0; y < h; y++)
123	for (x = 0; x < w; x++)	282	for (x = 0; x < w; x++)
		283	for (y = 0; y < h; y++)
124	for (i = 0; i < bpp; i++)	284	for (i = 0; i < 3; i++)
125	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];
126	}	286	}
127	OUTPUT:	287	OUTPUT:
128	RETVAL	288	RETVAL
129		289
130	GdkPixbuf_noinc *	290	GdkPixbuf_noinc *
131	flop (GdkPixbuf *pb)	291	rotate (GdkPixbuf *pb, int angle)
132	CODE:	292	CODE:
133	{	293	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
134	int w = gdk_pixbuf_get_width (pb);	294	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
135	int h = gdk_pixbuf_get_height (pb);	295	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
136	int bpp = gdk_pixbuf_get_n_channels (pb);	296	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
137	int x, y, i;	297	: angle);
138	guchar src = gdk_pixbuf_get_pixels (pb), dst;	298	OUTPUT:
139	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	299	RETVAL
140		300
141	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;
142		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
143	dst = gdk_pixbuf_get_pixels (RETVAL);	369	data = gdk_pixbuf_get_pixels (RETVAL);
144	dstr = gdk_pixbuf_get_rowstride (RETVAL);	370	rs = gdk_pixbuf_get_rowstride (RETVAL);
145		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)
146	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
147	for (x = 0; x < w; x++)	426	for (x = 0; x < w; x++)
148	for (i = 0; i < bpp; i++)	427	{
149	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.)));
150	}	439	}
151	OUTPUT:
152	RETVAL
153		440
154	#############################################################################	441	#############################################################################
155		442
156	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	443	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
157		444
		445	SV *
		446	foldcase (SV *pathsv)
		447	PROTOTYPE: $
		448	CODE:
		449	{
		450	STRLEN plen;
		451	U8 path = (U8 )SvPVutf8 (pathsv, plen);
		452	U8 *pend = path + plen;
		453	U8 dst [plen * 6 * 3], *dstp = dst;
		454
		455	while (path < pend)
		456	{
		457	U8 ch = *path;
		458
		459	if (ch >= 'a' && ch <= 'z')
		460	dstp++ = path++;
		461	else if (ch >= '0' && ch <= '9')
		462	{
		463	STRLEN el, nl = 0;
		464	while (path >= '0' && path <= '9' && path < pend)
		465	path++, nl++;
		466
		467	for (el = nl; el < 6; el++)
		468	*dstp++ = '0';
		469
		470	memcpy (dstp, path - nl, nl);
		471	dstp += nl;
		472	}
		473	else
		474	{
		475	STRLEN cl;
		476	to_utf8_fold (path, dstp, &cl);
		477	dstp += cl;
		478	path += is_utf8_char (path);
		479	}
		480	}
		481
		482	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		483	}
		484	OUTPUT:
		485	RETVAL
		486
158	GdkPixbuf_noinc *	487	GdkPixbuf_noinc *
159	p7_to_pb (int w, int h, guchar *src)	488	p7_to_pb (int w, int h, SV *src_sv)
		489	PROTOTYPE: @
160	CODE:	490	CODE:
161	{	491	{
162	int x, y;	492	int x, y;
163	guchar dst, d;	493	guchar dst, d;
164	int dstr;	494	int dstr;
		495	guchar src = (guchar )SvPVbyte_nolen (src_sv);
165		496
166	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	497	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
167	dst = gdk_pixbuf_get_pixels (RETVAL);	498	dst = gdk_pixbuf_get_pixels (RETVAL);
168	dstr = gdk_pixbuf_get_rowstride (RETVAL);	499	dstr = gdk_pixbuf_get_rowstride (RETVAL);
169		500
…		…
178	}	509	}
179	}	510	}
180	OUTPUT:	511	OUTPUT:
181	RETVAL	512	RETVAL
182		513
		514	#############################################################################
		515
		516	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		517
		518	void
		519	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		520	CODE:
		521	{
		522	int w = gdk_pixbuf_get_width (pb);
		523	int h = gdk_pixbuf_get_height (pb);
		524	int x, y, i;
		525	guchar *dst;
		526	int bpp = gdk_pixbuf_get_n_channels (pb);
		527	guchar *src = gdk_pixbuf_get_pixels (pb);
		528	int sstr = gdk_pixbuf_get_rowstride (pb);
		529
		530	a85_init ();
		531
		532	for (y = 0; y < h; y++)
		533	for (x = 0; x < w; x++)
		534	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		535	a85_push (fp, src [x * bpp + y * sstr + i]);
		536
		537	a85_finish (fp);
		538	}
		539
		540	void
		541	dump_binary (PerlIO fp, GdkPixbuf pb)
		542	CODE:
		543	{
		544	int w = gdk_pixbuf_get_width (pb);
		545	int h = gdk_pixbuf_get_height (pb);
		546	int x, y, i;
		547	guchar *dst;
		548	int bpp = gdk_pixbuf_get_n_channels (pb);
		549	guchar *src = gdk_pixbuf_get_pixels (pb);
		550	int sstr = gdk_pixbuf_get_rowstride (pb);
		551
		552	for (y = 0; y < h; y++)
		553	for (x = 0; x < w; x++)
		554	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		555	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		556	}
		557
		558	#############################################################################
		559
		560	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		561
183	SV *	562	SV *
184	pb_to_p7 (GdkPixbuf *pb)	563	pb_to_hv84 (GdkPixbuf *pb)
185	CODE:	564	CODE:
186	{	565	{
187	int w = gdk_pixbuf_get_width (pb);	566	int w = gdk_pixbuf_get_width (pb);
188	int h = gdk_pixbuf_get_height (pb);	567	int h = gdk_pixbuf_get_height (pb);
189	int x, y;	568	int x, y;
190	guchar *dst;	569	guchar *dst;
191	int bpp = gdk_pixbuf_get_n_channels (pb);	570	int bpp = gdk_pixbuf_get_n_channels (pb);
192	guchar *src = gdk_pixbuf_get_pixels (pb);	571	guchar *src = gdk_pixbuf_get_pixels (pb);
193	int sstr = gdk_pixbuf_get_rowstride (pb);	572	int sstr = gdk_pixbuf_get_rowstride (pb);
194	int Er[IW], Eg[IW], Eb[IW];
195	int seed = 77;
196
197	RETVAL = newSV (w * h);
198	SvPOK_only (RETVAL);
199	SvCUR_set (RETVAL, w * h);
200
201	dst = SvPVX (RETVAL);
202
203	memset (Er, 0, sizeof (int) * IW);
204	memset (Eg, 0, sizeof (int) * IW);
205	memset (Eb, 0, sizeof (int) * IW);
206
207	/* some primitive error distribution + random dithering */
208
209	for (y = 0; y < h; y++)
210	{
211	int er = 0, eg = 0, eb = 0;
212
213	for (x = 0; x < w; x++)
214	{
215	int r, g, b;
216	guchar p = src + x bpp + y * sstr;
217
218	r = ((p[0] + er + Er[x]) * 7 + 128) / 255;
219	g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;
220	b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;
221
222	r = r > 7 ? 7 : r < 0 ? 0 : r;
223	g = g > 7 ? 7 : g < 0 ? 0 : g;
224	b = b > 3 ? 3 : b < 0 ? 0 : b;
225
226	er += p[0] - (r * 255 + 4) / 7;
227	eg += p[1] - (g * 255 + 4) / 7;
228	eb += p[2] - (b * 255 + 2) / 3;
229
230	Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;
231	Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;
232	Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;
233
234	*dst++ = r << 5 \| g << 2 \| b;
235	}
236	}
237	}
238	OUTPUT:
239	RETVAL
240
241	SV *
242	make_histogram (SV *ar)
243	CODE:
244	{
245	int i;
246	AV av, result;
247
248	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
249	croak ("Not an array ref as first argument to make_histogram");
250
251	av = (AV *) SvRV (ar);
252	result = newAV ();
253
254	for (i = 0; i <= av_len (av); ++i)
255	{
256	int bigst, j;
257	SV sv = av_fetch (av, i, 1);
258	STRLEN len;
259	char *buf = SvPVbyte (sv, len);
260
261	int tmphist[256];
262	char *hist;
263
264	SV *histsv = newSV (257);
265	sv_upgrade (histsv, SVt_PV);
266	SvCUR_set (histsv, 256);
267	hist = SvPVX (histsv);
268
269	Zero (tmphist, 256, int);
270
271	while (len--)
272	++tmphist[(unsigned char)*buf++];
273
274	bigst = 1;
275	for (j = 0; j < 256; ++j)
276	if (tmphist[j] > bigst)
277	bigst = tmphist[j];
278
279	for (j = 0; j < 256; ++j)
280	hist[j] = tmphist[j] * 255 / bigst;
281
282	av_push (result, histsv);
283	}
284
285	RETVAL = newRV_noinc ((SV *)result);
286	}
287	OUTPUT:
288	RETVAL
289
290
291
292	#############################################################################
293
294	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
295
296	void
297	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
298	CODE:
299	{
300	int w = gdk_pixbuf_get_width (pb);
301	int h = gdk_pixbuf_get_height (pb);
302	int x, y, i;
303	guchar *dst;
304	int bpp = gdk_pixbuf_get_n_channels (pb);
305	guchar *src = gdk_pixbuf_get_pixels (pb);
306	int sstr = gdk_pixbuf_get_rowstride (pb);
307
308	a85_init ();
309
310	for (y = 0; y < h; y++)
311	for (x = 0; x < w; x++)
312	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
313	a85_push (fp, src [x * bpp + y * sstr + i]);
314
315	a85_finish (fp);
316	}
317
318	void
319	dump_binary (PerlIO fp, GdkPixbuf pb)
320	CODE:
321	{
322	int w = gdk_pixbuf_get_width (pb);
323	int h = gdk_pixbuf_get_height (pb);
324	int x, y, i;
325	guchar *dst;
326	int bpp = gdk_pixbuf_get_n_channels (pb);
327	guchar *src = gdk_pixbuf_get_pixels (pb);
328	int sstr = gdk_pixbuf_get_rowstride (pb);
329
330	for (y = 0; y < h; y++)
331	for (x = 0; x < w; x++)
332	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
333	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
334	}
335
336	#############################################################################
337
338	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
339
340	SV *
341	pb_to_hv84 (GdkPixbuf *pb)
342	CODE:
343	{
344	int w = gdk_pixbuf_get_width (pb);
345	int h = gdk_pixbuf_get_height (pb);
346	int x, y;
347	guchar *dst;
348	int bpp = gdk_pixbuf_get_n_channels (pb);
349	guchar *src = gdk_pixbuf_get_pixels (pb);
350	int sstr = gdk_pixbuf_get_rowstride (pb);
351		573
352	RETVAL = newSV (6 * 8 * 12 / 8);	574	RETVAL = newSV (6 * 8 * 12 / 8);
353	SvPOK_only (RETVAL);	575	SvPOK_only (RETVAL);
354	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	576	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
355		577
356	dst = SvPVX (RETVAL);	578	dst = (guchar *)SvPVX (RETVAL);
357		579
358	/* some primitive error distribution + random dithering */	580	/* some primitive error distribution + random dithering */
359		581
360	for (y = 0; y < h; y++)	582	for (y = 0; y < h; y++)
361	{	583	{
…		…
419	}	641	}
420	}	642	}
421	OUTPUT:	643	OUTPUT:
422	RETVAL	644	RETVAL
423		645
		646	#############################################################################
424		647
		648	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
425		649
		650	SV *
		651	extract_features (SV *ar)
		652	CODE:
		653	{
		654	int i;
		655	AV av, result;
		656
		657	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		658	croak ("Not an array ref as first argument to extract_features");
		659
		660	av = (AV *) SvRV (ar);
		661	result = newAV ();
		662
		663	for (i = 0; i <= av_len (av); ++i)
		664	{
		665	SV sv = av_fetch (av, i, 1);
		666	SV histsv = newSV (9 sizeof (float) + 1);
		667
		668	SvPOK_on (histsv);
		669	SvCUR_set (histsv, 9 * sizeof (float));
		670	float hist = (float )SvPVX (histsv);
		671
		672	struct feature f_h, f_s, f_v;
		673	feature_init (&f_h);
		674	feature_init (&f_s);
		675	feature_init (&f_v);
		676
		677	{
		678	STRLEN len;
		679	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		680	while (len >= 3)
		681	{
		682	unsigned int r, g, b, h, s, v;
		683	r = buf++; g = buf++; b = *buf++;
		684	rgb_to_hsv (r, g, b, &h, &s, &v);
		685
		686	feature_update_pass_1 (&f_h, h);
		687	feature_update_pass_1 (&f_s, s);
		688	feature_update_pass_1 (&f_v, v);
		689
		690	len -= 3;
		691	}
		692
		693	feature_finish_pass_1 (&f_h);
		694	feature_finish_pass_1 (&f_s);
		695	feature_finish_pass_1 (&f_v);
		696	}
		697
		698	{
		699	STRLEN len;
		700	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		701	while (len >= 3)
		702	{
		703	unsigned int r, g, b, h, s, v;
		704	r = buf++; g = buf++; b = *buf++;
		705	rgb_to_hsv (r, g, b, &h, &s, &v);
		706
		707	feature_update_pass_2 (&f_h, h);
		708	feature_update_pass_2 (&f_s, s);
		709	feature_update_pass_2 (&f_v, v);
		710
		711	len -= 3;
		712	}
		713
		714	feature_finish_pass_2 (&f_h);
		715	feature_finish_pass_2 (&f_s);
		716	feature_finish_pass_2 (&f_v);
		717	}
		718
		719	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		720	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		721	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
		722
		723	av_push (result, histsv);
		724	}
		725
		726	RETVAL = newRV_noinc ((SV *)result);
		727	}
		728	OUTPUT:
		729	RETVAL
		730

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Comparing CV/CV.xs (file contents): Revision 1.12 by root, Tue Feb 8 11:00:11 2005 UTC vs. Revision 1.40 by root, Sat Nov 25 15:00:51 2006 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.12 by root, Tue Feb 8 11:00:11 2005 UTC vs.
Revision 1.40 by root, Sat Nov 25 15:00:51 2006 UTC