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

Comparing CV/CV.xs (file contents):
Revision 1.14 by root, Tue Feb 8 12:51:12 2005 UTC vs.
Revision 1.36 by root, Thu Jun 22 20:50:05 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	// this is a peculiar weightung, but it works fine
		124	f->v1 /= 255.;
		125	f->v2 /= 128. * 128.;
		126	f->v3 /= 128. * 128. * 64.;
		127	}
17		128
18	static guint32 a85_val;	129	static guint32 a85_val;
19	static guint a85_cnt;	130	static guint a85_cnt;
20	static guchar a85_buf[LINELENGTH], *a85_ptr;	131	static guchar a85_buf[LINELENGTH], *a85_ptr;
21		132
68	*a85_ptr++ = '\n';	179	*a85_ptr++ = '\n';
69		180
70	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	181	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
71	}	182	}
72		183
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	/////////////////////////////////////////////////////////////////////////////	184	/////////////////////////////////////////////////////////////////////////////
101		185
102	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	186	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
103		187
104	PROTOTYPES: ENABLE	188	PROTOTYPES: ENABLE
105		189
		190	# missing function in perl. really :)
		191	int
		192	common_prefix_length (a, b)
		193	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		194	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		195	CODE:
		196	RETVAL = 0;
		197
		198	while (a == b && *a)
		199	{
		200	RETVAL += (*a & 0xc0) != 0x80;
		201	a++, b++;
		202	}
		203
		204	OUTPUT:
		205	RETVAL
		206
		207	const char *
		208	magic (const char *path)
		209	CODE:
		210	{
		211	static magic_t cookie;
		212
		213	if (!cookie)
		214	{
		215	cookie = magic_open (MAGIC_NONE);
		216
		217	if (cookie)
		218	magic_load (cookie, 0);
		219	else
		220	XSRETURN_UNDEF;
		221	}
		222
		223	RETVAL = magic_file (cookie, path);
		224	}
		225	OUTPUT:
		226	RETVAL
		227
		228	const char *
		229	magic_mime (const char *path)
		230	CODE:
		231	{
		232	static magic_t cookie;
		233
		234	if (!cookie)
		235	{
		236	cookie = magic_open (MAGIC_MIME);
		237
		238	if (cookie)
		239	magic_load (cookie, 0);
		240	else
		241	XSRETURN_UNDEF;
		242	}
		243
		244	RETVAL = magic_file (cookie, path);
		245	}
		246	OUTPUT:
		247	RETVAL
		248
		249	# missing in Gtk2 perl module
		250
		251	gboolean
		252	gdk_net_wm_supports (GdkAtom property)
		253	CODE:
		254	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		255	RETVAL = gdk_net_wm_supports (property);
		256	#else
		257	RETVAL = 0;
		258	#endif
		259	OUTPUT:
		260	RETVAL
		261
106	GdkPixbuf_noinc *	262	GdkPixbuf_noinc *
107	transpose (GdkPixbuf *pb)	263	dealpha_expose (GdkPixbuf *pb)
108	CODE:	264	CODE:
109	{	265	{
110	int w = gdk_pixbuf_get_width (pb);	266	int w = gdk_pixbuf_get_width (pb);
111	int h = gdk_pixbuf_get_height (pb);	267	int h = gdk_pixbuf_get_height (pb);
112	int bpp = gdk_pixbuf_get_n_channels (pb);	268	int bpp = gdk_pixbuf_get_n_channels (pb);
113	int x, y, i;	269	int x, y, i;
114	guchar src = gdk_pixbuf_get_pixels (pb), dst;	270	guchar src = gdk_pixbuf_get_pixels (pb), dst;
115	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	271	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
116		272
117	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	273	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
118		274
119	dst = gdk_pixbuf_get_pixels (RETVAL);	275	dst = gdk_pixbuf_get_pixels (RETVAL);
120	dstr = gdk_pixbuf_get_rowstride (RETVAL);	276	dstr = gdk_pixbuf_get_rowstride (RETVAL);
121		277
122	for (y = 0; y < h; y++)
123	for (x = 0; x < w; x++)	278	for (x = 0; x < w; x++)
		279	for (y = 0; y < h; y++)
124	for (i = 0; i < bpp; i++)	280	for (i = 0; i < 3; i++)
125	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	281	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
126	}	282	}
127	OUTPUT:	283	OUTPUT:
128	RETVAL	284	RETVAL
129		285
130	GdkPixbuf_noinc *	286	GdkPixbuf_noinc *
131	flop (GdkPixbuf *pb)	287	rotate (GdkPixbuf *pb, int angle)
132	CODE:	288	CODE:
133	{	289	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
134	int w = gdk_pixbuf_get_width (pb);	290	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
135	int h = gdk_pixbuf_get_height (pb);	291	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
136	int bpp = gdk_pixbuf_get_n_channels (pb);	292	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
137	int x, y, i;	293	: angle);
138	guchar src = gdk_pixbuf_get_pixels (pb), dst;	294	OUTPUT:
139	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	295	RETVAL
140		296
141	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	297	GdkPixbuf_noinc *
		298	load_jpeg (SV *path, int thumbnail=0)
		299	CODE:
		300	{
		301	struct jpeg_decompress_struct cinfo;
		302	struct jpg_err_mgr jerr;
		303	guchar *data;
		304	int rs;
		305	FILE *fp;
		306	volatile GdkPixbuf *pb = 0;
142		307
		308	RETVAL = 0;
		309
		310	fp = fopen (SvPVbyte_nolen (path), "rb");
		311
		312	if (!fp)
		313	XSRETURN_UNDEF;
		314
		315	cinfo.err = jpeg_std_error (&jerr.err);
		316
		317	jerr.err.error_exit = cv_error_exit;
		318	jerr.err.output_message = cv_error_output;
		319
		320	if ((rs = setjmp (jerr.setjmp_buffer)))
		321	{
		322	fclose (fp);
		323	jpeg_destroy_decompress (&cinfo);
		324
		325	if (pb)
		326	g_object_unref ((gpointer)pb);
		327
		328	XSRETURN_UNDEF;
		329	}
		330
		331	jpeg_create_decompress (&cinfo);
		332
		333	jpeg_stdio_src (&cinfo, fp);
		334	jpeg_read_header (&cinfo, TRUE);
		335
		336	cinfo.dct_method = JDCT_DEFAULT;
		337	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
		338	cinfo.do_block_smoothing = FALSE;
		339	cinfo.out_color_space = JCS_RGB;
		340	cinfo.quantize_colors = FALSE;
		341
		342	cinfo.scale_num = 1;
		343	cinfo.scale_denom = 1;
		344
		345	jpeg_calc_output_dimensions (&cinfo);
		346
		347	if (thumbnail)
		348	{
		349	cinfo.dct_method = JDCT_FASTEST;
		350	cinfo.do_fancy_upsampling = FALSE;
		351
		352	while (cinfo.scale_denom < 8
		353	&& cinfo.output_width >= IW*4
		354	&& cinfo.output_height >= IH*4)
		355	{
		356	cinfo.scale_denom <<= 1;
		357	jpeg_calc_output_dimensions (&cinfo);
		358	}
		359	}
		360
		361	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
		362	if (!RETVAL)
		363	longjmp (jerr.setjmp_buffer, 2);
		364
143	dst = gdk_pixbuf_get_pixels (RETVAL);	365	data = gdk_pixbuf_get_pixels (RETVAL);
144	dstr = gdk_pixbuf_get_rowstride (RETVAL);	366	rs = gdk_pixbuf_get_rowstride (RETVAL);
145		367
		368	if (cinfo.output_components != 3)
		369	longjmp (jerr.setjmp_buffer, 3);
		370
		371	jpeg_start_decompress (&cinfo);
		372
		373	while (cinfo.output_scanline < cinfo.output_height)
		374	{
		375	int remaining = cinfo.output_height - cinfo.output_scanline;
		376	JSAMPROW rp[4];
		377
		378	rp [0] = data + cinfo.output_scanline * rs;
		379	rp [1] = (guchar *)rp [0] + rs;
		380	rp [2] = (guchar *)rp [1] + rs;
		381	rp [3] = (guchar *)rp [2] + rs;
		382
		383	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
		384	}
		385
		386	jpeg_finish_decompress (&cinfo);
		387	fclose (fp);
		388	jpeg_destroy_decompress (&cinfo);
		389	}
		390	OUTPUT:
		391	RETVAL
		392
		393	void
		394	compare (GdkPixbuf a, GdkPixbuf b)
		395	PPCODE:
		396	{
		397	int w = gdk_pixbuf_get_width (a);
		398	int h = gdk_pixbuf_get_height (a);
		399	int sa = gdk_pixbuf_get_rowstride (a);
		400	int sb = gdk_pixbuf_get_rowstride (b);
		401
		402	guchar *pa = gdk_pixbuf_get_pixels (a);
		403	guchar *pb = gdk_pixbuf_get_pixels (b);
		404
		405	int x, y;
		406
		407	assert (w == gdk_pixbuf_get_width (b));
		408	assert (h == gdk_pixbuf_get_height (b));
		409
		410	assert (gdk_pixbuf_get_n_channels (a) == 3);
		411	assert (gdk_pixbuf_get_n_channels (b) == 3);
		412
		413	double diff = 0.;
		414	int peak = 0;
		415
		416	if (w && h)
146	for (y = 0; y < h; y++)	417	for (y = 0; y < h; y++)
		418	{
		419	guchar pa_ = pa + y sa;
		420	guchar pb_ = pb + y sb;
		421
147	for (x = 0; x < w; x++)	422	for (x = 0; x < w; x++)
148	for (i = 0; i < bpp; i++)	423	{
149	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];	424	int d;
		425
		426	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		427	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		428	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		429	}
		430	}
		431
		432	EXTEND (SP, 2);
		433	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		434	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
150	}	435	}
151	OUTPUT:
152	RETVAL
153		436
154	#############################################################################	437	#############################################################################
155		438
156	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	439	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
157		440
		441	SV *
		442	foldcase (SV *pathsv)
		443	PROTOTYPE: $
		444	CODE:
		445	{
		446	STRLEN plen;
		447	U8 path = (U8 )SvPVutf8 (pathsv, plen);
		448	U8 *pend = path + plen;
		449	U8 dst [plen * 6 * 3], *dstp = dst;
		450
		451	while (path < pend)
		452	{
		453	U8 ch = *path;
		454
		455	if (ch >= 'a' && ch <= 'z')
		456	dstp++ = path++;
		457	else if (ch >= '0' && ch <= '9')
		458	{
		459	STRLEN el, nl = 0;
		460	while (path >= '0' && path <= '9' && path < pend)
		461	path++, nl++;
		462
		463	for (el = nl; el < 6; el++)
		464	*dstp++ = '0';
		465
		466	memcpy (dstp, path - nl, nl);
		467	dstp += nl;
		468	}
		469	else
		470	{
		471	STRLEN cl;
		472	to_utf8_fold (path, dstp, &cl);
		473	dstp += cl;
		474	path += is_utf8_char (path);
		475	}
		476	}
		477
		478	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		479	}
		480	OUTPUT:
		481	RETVAL
		482
158	GdkPixbuf_noinc *	483	GdkPixbuf_noinc *
159	p7_to_pb (int w, int h, guchar *src)	484	p7_to_pb (int w, int h, SV *src_sv)
		485	PROTOTYPE: @
160	CODE:	486	CODE:
161	{	487	{
162	int x, y;	488	int x, y;
163	guchar dst, d;	489	guchar dst, d;
164	int dstr;	490	int dstr;
		491	guchar src = (guchar )SvPVbyte_nolen (src_sv);
165		492
166	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	493	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
167	dst = gdk_pixbuf_get_pixels (RETVAL);	494	dst = gdk_pixbuf_get_pixels (RETVAL);
168	dstr = gdk_pixbuf_get_rowstride (RETVAL);	495	dstr = gdk_pixbuf_get_rowstride (RETVAL);
169		496
…		…
178	}	505	}
179	}	506	}
180	OUTPUT:	507	OUTPUT:
181	RETVAL	508	RETVAL
182		509
		510	#############################################################################
		511
		512	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		513
		514	void
		515	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		516	CODE:
		517	{
		518	int w = gdk_pixbuf_get_width (pb);
		519	int h = gdk_pixbuf_get_height (pb);
		520	int x, y, i;
		521	guchar *dst;
		522	int bpp = gdk_pixbuf_get_n_channels (pb);
		523	guchar *src = gdk_pixbuf_get_pixels (pb);
		524	int sstr = gdk_pixbuf_get_rowstride (pb);
		525
		526	a85_init ();
		527
		528	for (y = 0; y < h; y++)
		529	for (x = 0; x < w; x++)
		530	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		531	a85_push (fp, src [x * bpp + y * sstr + i]);
		532
		533	a85_finish (fp);
		534	}
		535
		536	void
		537	dump_binary (PerlIO fp, GdkPixbuf pb)
		538	CODE:
		539	{
		540	int w = gdk_pixbuf_get_width (pb);
		541	int h = gdk_pixbuf_get_height (pb);
		542	int x, y, i;
		543	guchar *dst;
		544	int bpp = gdk_pixbuf_get_n_channels (pb);
		545	guchar *src = gdk_pixbuf_get_pixels (pb);
		546	int sstr = gdk_pixbuf_get_rowstride (pb);
		547
		548	for (y = 0; y < h; y++)
		549	for (x = 0; x < w; x++)
		550	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		551	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		552	}
		553
		554	#############################################################################
		555
		556	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		557
183	SV *	558	SV *
184	pb_to_p7 (GdkPixbuf *pb)	559	pb_to_hv84 (GdkPixbuf *pb)
185	CODE:	560	CODE:
186	{	561	{
187	int w = gdk_pixbuf_get_width (pb);	562	int w = gdk_pixbuf_get_width (pb);
188	int h = gdk_pixbuf_get_height (pb);	563	int h = gdk_pixbuf_get_height (pb);
189	int x, y;	564	int x, y;
190	guchar *dst;	565	guchar *dst;
191	int bpp = gdk_pixbuf_get_n_channels (pb);	566	int bpp = gdk_pixbuf_get_n_channels (pb);
192	guchar *src = gdk_pixbuf_get_pixels (pb);	567	guchar *src = gdk_pixbuf_get_pixels (pb);
193	int sstr = gdk_pixbuf_get_rowstride (pb);	568	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	SvPOK_on (histsv);
266	SvCUR_set (histsv, 256);
267	hist = SvPVX (histsv);
268
269	Zero (tmphist, 256, int);
270
271	j = len;
272
273	while (len--)
274	++tmphist[(unsigned char)*buf++ & 0xda];
275
276	len = j;
277
278	bigst = 1;
279	for (j = 0; j < 256; ++j)
280	if (tmphist[j] > bigst)
281	bigst = tmphist[j];
282
283	for (j = 0; j < 256; ++j)
284	hist[j] = tmphist[j] * 255 / (len == 0 ? 1 : len);//bigst;
285
286	av_push (result, histsv);
287	}
288
289	RETVAL = newRV_noinc ((SV *)result);
290	}
291	OUTPUT:
292	RETVAL
293
294
295
296	#############################################################################
297
298	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
299
300	void
301	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
302	CODE:
303	{
304	int w = gdk_pixbuf_get_width (pb);
305	int h = gdk_pixbuf_get_height (pb);
306	int x, y, i;
307	guchar *dst;
308	int bpp = gdk_pixbuf_get_n_channels (pb);
309	guchar *src = gdk_pixbuf_get_pixels (pb);
310	int sstr = gdk_pixbuf_get_rowstride (pb);
311
312	a85_init ();
313
314	for (y = 0; y < h; y++)
315	for (x = 0; x < w; x++)
316	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
317	a85_push (fp, src [x * bpp + y * sstr + i]);
318
319	a85_finish (fp);
320	}
321
322	void
323	dump_binary (PerlIO fp, GdkPixbuf pb)
324	CODE:
325	{
326	int w = gdk_pixbuf_get_width (pb);
327	int h = gdk_pixbuf_get_height (pb);
328	int x, y, i;
329	guchar *dst;
330	int bpp = gdk_pixbuf_get_n_channels (pb);
331	guchar *src = gdk_pixbuf_get_pixels (pb);
332	int sstr = gdk_pixbuf_get_rowstride (pb);
333
334	for (y = 0; y < h; y++)
335	for (x = 0; x < w; x++)
336	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
337	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
338	}
339
340	#############################################################################
341
342	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
343
344	SV *
345	pb_to_hv84 (GdkPixbuf *pb)
346	CODE:
347	{
348	int w = gdk_pixbuf_get_width (pb);
349	int h = gdk_pixbuf_get_height (pb);
350	int x, y;
351	guchar *dst;
352	int bpp = gdk_pixbuf_get_n_channels (pb);
353	guchar *src = gdk_pixbuf_get_pixels (pb);
354	int sstr = gdk_pixbuf_get_rowstride (pb);
355		569
356	RETVAL = newSV (6 * 8 * 12 / 8);	570	RETVAL = newSV (6 * 8 * 12 / 8);
357	SvPOK_only (RETVAL);	571	SvPOK_only (RETVAL);
358	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	572	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
359		573
360	dst = SvPVX (RETVAL);	574	dst = (guchar *)SvPVX (RETVAL);
361		575
362	/* some primitive error distribution + random dithering */	576	/* some primitive error distribution + random dithering */
363		577
364	for (y = 0; y < h; y++)	578	for (y = 0; y < h; y++)
365	{	579	{
…		…
423	}	637	}
424	}	638	}
425	OUTPUT:	639	OUTPUT:
426	RETVAL	640	RETVAL
427		641
		642	#############################################################################
428		643
		644	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
429		645
		646	SV *
		647	extract_features (SV *ar)
		648	CODE:
		649	{
		650	int i;
		651	AV av, result;
		652
		653	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		654	croak ("Not an array ref as first argument to make_histogram");
		655
		656	av = (AV *) SvRV (ar);
		657	result = newAV ();
		658
		659	for (i = 0; i <= av_len (av); ++i)
		660	{
		661	SV sv = av_fetch (av, i, 1);
		662	SV histsv = newSV (9 sizeof (float) + 1);
		663
		664	SvPOK_on (histsv);
		665	SvCUR_set (histsv, 9 * sizeof (float));
		666	float hist = (float )SvPVX (histsv);
		667
		668	struct feature f_h, f_s, f_v;
		669	feature_init (&f_h);
		670	feature_init (&f_s);
		671	feature_init (&f_v);
		672
		673	{
		674	STRLEN len;
		675	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		676	while (len >= 3)
		677	{
		678	unsigned int r, g, b, h, s, v;
		679	r = buf++; g = buf++; b = *buf++;
		680	rgb_to_hsv (r, g, b, &h, &s, &v);
		681
		682	feature_update_pass_1 (&f_h, h);
		683	feature_update_pass_1 (&f_s, s);
		684	feature_update_pass_1 (&f_v, v);
		685
		686	len -= 3;
		687	}
		688
		689	feature_finish_pass_1 (&f_h);
		690	feature_finish_pass_1 (&f_s);
		691	feature_finish_pass_1 (&f_v);
		692	}
		693
		694	{
		695	STRLEN len;
		696	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		697	while (len >= 3)
		698	{
		699	unsigned int r, g, b, h, s, v;
		700	r = buf++; g = buf++; b = *buf++;
		701	rgb_to_hsv (r, g, b, &h, &s, &v);
		702
		703	feature_update_pass_2 (&f_h, h);
		704	feature_update_pass_2 (&f_s, s);
		705	feature_update_pass_2 (&f_v, v);
		706
		707	len -= 3;
		708	}
		709
		710	feature_finish_pass_2 (&f_h);
		711	feature_finish_pass_2 (&f_s);
		712	feature_finish_pass_2 (&f_v);
		713	}
		714
		715	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		716	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		717	hist [6] = f_v.v1 ; hist [7] = f_v.v2 ; hist [8] = f_v.v3 ;
		718
		719	av_push (result, histsv);
		720	}
		721
		722	RETVAL = newRV_noinc ((SV *)result);
		723	}
		724	OUTPUT:
		725	RETVAL
		726
		727	SV *
		728	make_histograms (SV *ar)
		729	CODE:
		730	{
		731	int i;
		732	AV av, result;
		733
		734	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		735	croak ("Not an array ref as first argument to make_histogram");
		736
		737	av = (AV *) SvRV (ar);
		738	result = newAV ();
		739
		740	for (i = 0; i <= av_len (av); ++i)
		741	{
		742	const int HISTSIZE = 64;
		743
		744	int j;
		745	SV sv = av_fetch (av, i, 1);
		746	STRLEN len;
		747	char *buf = SvPVbyte (sv, len);
		748
		749	int tmphist[HISTSIZE];
		750	float *hist;
		751
		752	SV histsv = newSV (HISTSIZE sizeof (float) + 1);
		753	SvPOK_on (histsv);
		754	SvCUR_set (histsv, HISTSIZE * sizeof (float));
		755	hist = (float *)SvPVX (histsv);
		756
		757	Zero (tmphist, sizeof (tmphist), char);
		758
		759	for (j = len; j--; )
		760	{
		761	unsigned int idx
		762	= ((*buf & 0xc0) >> 2)
		763	\| ((*buf & 0x18) >> 1)
		764	\| (*buf & 0x03);
		765
		766	++tmphist[idx];
		767	++buf;
		768	}
		769
		770	for (j = 0; j < HISTSIZE; ++j)
		771	hist[j] = (float)tmphist[j] / (len + 1e-30);
		772
		773	av_push (result, histsv);
		774	}
		775
		776	RETVAL = newRV_noinc ((SV *)result);
		777	}
		778	OUTPUT:
		779	RETVAL
		780
		781

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing CV/CV.xs (file contents): Revision 1.14 by root, Tue Feb 8 12:51:12 2005 UTC vs. Revision 1.36 by root, Thu Jun 22 20:50:05 2006 UTC

Diff Legend

Comparing CV/CV.xs (file contents):
Revision 1.14 by root, Tue Feb 8 12:51:12 2005 UTC vs.
Revision 1.36 by root, Thu Jun 22 20:50:05 2006 UTC