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

Comparing CV/CV.xs (file contents):
Revision 1.9 by root, Tue Apr 6 23:53:20 2004 UTC vs.
Revision 1.44 by root, Sun Dec 30 16:23:23 2012 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	#include <assert.h>
		20
		21	#define IW 80 /* MUST match Schnauzer.pm! */
		22	#define IH 60 /* MUST match Schnauzer.pm! */
11		23
12	#define RAND (seed = (seed + 7141) * 54773 % 134456)	24	#define RAND (seed = (seed + 7141) * 54773 % 134456)
13		25
14	#define LINELENGTH 240	26	#define LINELENGTH 240
15		27
16	#define ELLIPSIS "\xe2\x80\xa6"	28	#define ELLIPSIS "\xe2\x80\xa6"
		29
		30	typedef char *octet_string;
		31
		32	struct jpg_err_mgr
		33	{
		34	struct jpeg_error_mgr err;
		35	jmp_buf setjmp_buffer;
		36	};
		37
		38	static void
		39	cv_error_exit (j_common_ptr cinfo)
		40	{
		41	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
		42	}
		43
		44	static void
		45	cv_error_output (j_common_ptr cinfo)
		46	{
		47	return;
		48	}
		49
		50	static void
		51	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
		52	unsigned int h, unsigned int s, unsigned int *v)
		53	{
		54	unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
		55	unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
		56	unsigned int delta = mx - mn;
		57
		58	*v = mx;
		59
		60	s = mx ? delta 255 / mx : 0;
		61
		62	if (delta == 0)
		63	*h = 0;
		64	else
		65	{
		66	if (r == mx)
		67	h = ((int)g - (int)b) 255 / (int)(delta * 3);
		68	else if (g == mx)
		69	h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
		70	else if (b == mx)
		71	h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
		72
		73	*h &= 255;
		74	}
		75	}
		76
		77	struct feature {
		78	float v1, v2, v3; // mean, square, cube
		79	int n;
		80	};
		81
		82	static void
		83	feature_init (struct feature *f)
		84	{
		85	f->v1 = 0.;
		86	f->v2 = 0.;
		87	f->v3 = 0.;
		88	f->n = 0;
		89	}
		90
		91	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		92	// elmex ist schuld.
		93	static void
		94	feature_update_pass_1 (struct feature *f, unsigned int v)
		95	{
		96	f->v1 += v;
		97	f->n += 1;
		98	}
		99
		100	static void
		101	feature_finish_pass_1 (struct feature *f)
		102	{
		103	if (f->n < 1)
		104	return;
		105
		106	f->v1 /= f->n;
		107	}
		108
		109	static void
		110	feature_update_pass_2 (struct feature *f, unsigned int v)
		111	{
		112	float d = v - f->v1;
		113
		114	f->v2 += d * d;
		115	f->v3 += d * d * d;
		116	}
		117
		118	static void
		119	feature_finish_pass_2 (struct feature *f)
		120	{
		121	if (f->n < 1)
		122	return;
		123
		124	f->v2 /= f->n;
		125	f->v3 /= f->n;
		126
		127	f->v1 /= 255.;
		128	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		129	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		130	}
17		131
18	static guint32 a85_val;	132	static guint32 a85_val;
19	static guint a85_cnt;	133	static guint a85_cnt;
20	static guchar a85_buf[LINELENGTH], *a85_ptr;	134	static guchar a85_buf[LINELENGTH], *a85_ptr;
21		135
68	*a85_ptr++ = '\n';	182	*a85_ptr++ = '\n';
69		183
70	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	184	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
71	}	185	}
72		186
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	/////////////////////////////////////////////////////////////////////////////	187	/////////////////////////////////////////////////////////////////////////////
101		188
102	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	189	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
103		190
104	PROTOTYPES: ENABLE	191	PROTOTYPES: ENABLE
105		192
		193	# missing function in perl. really :)
		194	int
		195	common_prefix_length (a, b)
		196	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		197	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		198	CODE:
		199	RETVAL = 0;
		200
		201	while (a == b && *a)
		202	{
		203	RETVAL += (*a & 0xc0) != 0x80;
		204	a++, b++;
		205	}
		206
		207	OUTPUT:
		208	RETVAL
		209
		210	const char *
		211	magic (octet_string path)
		212	CODE:
		213	{
		214	static magic_t cookie;
		215
		216	if (!cookie)
		217	{
		218	cookie = magic_open (MAGIC_NONE);
		219
		220	if (cookie)
		221	magic_load (cookie, 0);
		222	else
		223	XSRETURN_UNDEF;
		224	}
		225
		226	RETVAL = magic_file (cookie, path);
		227	}
		228	OUTPUT:
		229	RETVAL
		230
		231	const char *
		232	magic_mime (octet_string path)
		233	CODE:
		234	{
		235	static magic_t cookie;
		236
		237	if (!cookie)
		238	{
		239	cookie = magic_open (MAGIC_MIME);
		240
		241	if (cookie)
		242	magic_load (cookie, 0);
		243	else
		244	XSRETURN_UNDEF;
		245	}
		246
		247	RETVAL = magic_file (cookie, path);
		248	}
		249	OUTPUT:
		250	RETVAL
		251
		252	# missing/broken in Gtk2 perl module
		253
		254	void
		255	gdk_window_clear_hints (GdkWindow *window)
		256	CODE:
		257	gdk_window_set_geometry_hints (window, 0, 0);
		258
		259	gboolean
		260	gdk_net_wm_supports (GdkAtom property)
		261	CODE:
		262	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		263	RETVAL = gdk_net_wm_supports (property);
		264	#else
		265	RETVAL = 0;
		266	#endif
		267	OUTPUT:
		268	RETVAL
		269
106	GdkPixbuf_noinc *	270	GdkPixbuf_noinc *
107	transpose (GdkPixbuf *pb)	271	dealpha_expose (GdkPixbuf *pb)
108	CODE:	272	CODE:
109	{	273	{
110	int w = gdk_pixbuf_get_width (pb);	274	int w = gdk_pixbuf_get_width (pb);
111	int h = gdk_pixbuf_get_height (pb);	275	int h = gdk_pixbuf_get_height (pb);
112	int bpp = gdk_pixbuf_get_n_channels (pb);	276	int bpp = gdk_pixbuf_get_n_channels (pb);
113	int x, y, i;	277	int x, y, i;
114	guchar src = gdk_pixbuf_get_pixels (pb), dst;	278	guchar src = gdk_pixbuf_get_pixels (pb), dst;
115	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	279	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
116		280
117	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	281	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
118		282
119	dst = gdk_pixbuf_get_pixels (RETVAL);	283	dst = gdk_pixbuf_get_pixels (RETVAL);
120	dstr = gdk_pixbuf_get_rowstride (RETVAL);	284	dstr = gdk_pixbuf_get_rowstride (RETVAL);
121		285
122	for (y = 0; y < h; y++)
123	for (x = 0; x < w; x++)	286	for (x = 0; x < w; x++)
		287	for (y = 0; y < h; y++)
124	for (i = 0; i < bpp; i++)	288	for (i = 0; i < 3; i++)
125	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	289	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
126	}	290	}
127	OUTPUT:	291	OUTPUT:
128	RETVAL	292	RETVAL
129		293
130	GdkPixbuf_noinc *	294	GdkPixbuf_noinc *
131	flop (GdkPixbuf *pb)	295	rotate (GdkPixbuf *pb, int angle)
132	CODE:	296	CODE:
133	{	297	if (angle < 0)
134	int w = gdk_pixbuf_get_width (pb);	298	angle += 360;
135	int h = gdk_pixbuf_get_height (pb);	299	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
136	int bpp = gdk_pixbuf_get_n_channels (pb);	300	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
137	int x, y, i;	301	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
138	guchar src = gdk_pixbuf_get_pixels (pb), dst;	302	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
139	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	303	: angle);
		304	OUTPUT:
		305	RETVAL
140		306
141	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	307	GdkPixbuf_noinc *
		308	load_jpeg (SV *path, int thumbnail=0)
		309	CODE:
		310	{
		311	struct jpeg_decompress_struct cinfo;
		312	struct jpg_err_mgr jerr;
		313	guchar *data;
		314	int rs;
		315	FILE *fp;
		316	volatile GdkPixbuf *pb = 0;
142		317
		318	RETVAL = 0;
		319
		320	fp = fopen (SvPVbyte_nolen (path), "rb");
		321
		322	if (!fp)
		323	XSRETURN_UNDEF;
		324
		325	cinfo.err = jpeg_std_error (&jerr.err);
		326
		327	jerr.err.error_exit = cv_error_exit;
		328	jerr.err.output_message = cv_error_output;
		329
		330	if ((rs = setjmp (jerr.setjmp_buffer)))
		331	{
		332	fclose (fp);
		333	jpeg_destroy_decompress (&cinfo);
		334
		335	if (pb)
		336	g_object_unref ((gpointer)pb);
		337
		338	XSRETURN_UNDEF;
		339	}
		340
		341	jpeg_create_decompress (&cinfo);
		342
		343	jpeg_stdio_src (&cinfo, fp);
		344	jpeg_read_header (&cinfo, TRUE);
		345
		346	cinfo.dct_method = JDCT_DEFAULT;
		347	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
		348	cinfo.do_block_smoothing = FALSE;
		349	cinfo.out_color_space = JCS_RGB;
		350	cinfo.quantize_colors = FALSE;
		351
		352	cinfo.scale_num = 1;
		353	cinfo.scale_denom = 1;
		354
		355	jpeg_calc_output_dimensions (&cinfo);
		356
		357	if (thumbnail)
		358	{
		359	cinfo.dct_method = JDCT_FASTEST;
		360	cinfo.do_fancy_upsampling = FALSE;
		361
		362	while (cinfo.scale_denom < 8
		363	&& cinfo.output_width >= IW*4
		364	&& cinfo.output_height >= IH*4)
		365	{
		366	cinfo.scale_denom <<= 1;
		367	jpeg_calc_output_dimensions (&cinfo);
		368	}
		369	}
		370
		371	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);
		372	if (!RETVAL)
		373	longjmp (jerr.setjmp_buffer, 2);
		374
143	dst = gdk_pixbuf_get_pixels (RETVAL);	375	data = gdk_pixbuf_get_pixels (RETVAL);
144	dstr = gdk_pixbuf_get_rowstride (RETVAL);	376	rs = gdk_pixbuf_get_rowstride (RETVAL);
145		377
		378	if (cinfo.output_components != 3)
		379	longjmp (jerr.setjmp_buffer, 3);
		380
		381	jpeg_start_decompress (&cinfo);
		382
		383	while (cinfo.output_scanline < cinfo.output_height)
		384	{
		385	int remaining = cinfo.output_height - cinfo.output_scanline;
		386	JSAMPROW rp[4];
		387
		388	rp [0] = data + cinfo.output_scanline * rs;
		389	rp [1] = (guchar *)rp [0] + rs;
		390	rp [2] = (guchar *)rp [1] + rs;
		391	rp [3] = (guchar *)rp [2] + rs;
		392
		393	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
		394	}
		395
		396	jpeg_finish_decompress (&cinfo);
		397	fclose (fp);
		398	jpeg_destroy_decompress (&cinfo);
		399	}
		400	OUTPUT:
		401	RETVAL
		402
		403	void
		404	compare (GdkPixbuf a, GdkPixbuf b)
		405	PPCODE:
		406	{
		407	int w = gdk_pixbuf_get_width (a);
		408	int h = gdk_pixbuf_get_height (a);
		409
		410	int sa = gdk_pixbuf_get_rowstride (a);
		411	int sb = gdk_pixbuf_get_rowstride (b);
		412
		413	guchar *pa = gdk_pixbuf_get_pixels (a);
		414	guchar *pb = gdk_pixbuf_get_pixels (b);
		415
		416	int x, y;
		417
		418	assert (w == gdk_pixbuf_get_width (b));
		419	assert (h == gdk_pixbuf_get_height (b));
		420
		421	assert (gdk_pixbuf_get_n_channels (a) == 3);
		422	assert (gdk_pixbuf_get_n_channels (b) == 3);
		423
		424	double diff = 0.;
		425	int peak = 0;
		426
		427	if (w && h)
146	for (y = 0; y < h; y++)	428	for (y = 0; y < h; y++)
		429	{
		430	guchar pa_ = pa + y sa;
		431	guchar pb_ = pb + y sb;
		432
147	for (x = 0; x < w; x++)	433	for (x = 0; x < w; x++)
148	for (i = 0; i < bpp; i++)	434	{
149	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];	435	int d;
		436
		437	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		438	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		439	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		440	}
		441	}
		442
		443	EXTEND (SP, 2);
		444	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		445	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
150	}	446	}
151	OUTPUT:
152	RETVAL
153		447
154	#############################################################################	448	#############################################################################
155		449
156	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	450	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
157		451
		452	# currently only works for filenames (octet strings)
		453
		454	SV *
		455	foldcase (SV *pathsv)
		456	PROTOTYPE: $
		457	CODE:
		458	{
		459	STRLEN plen;
		460	U8 path = (U8 )SvPV (pathsv, plen);
		461	U8 *pend = path + plen;
		462	U8 dst [plen * 6 * 3], *dstp = dst;
		463
		464	while (path < pend)
		465	{
		466	U8 ch = *path;
		467
		468	if (ch >= 'a' && ch <= 'z')
		469	dstp++ = path++;
		470	else if (ch >= 'A' && ch <= 'Z')
		471	dstp++ = path++ + ('a' - 'A');
		472	else if (ch >= '0' && ch <= '9')
		473	{
		474	STRLEN el, nl = 0;
		475	while (path >= '0' && path <= '9' && path < pend)
		476	path++, nl++;
		477
		478	for (el = nl; el < 6; el++)
		479	*dstp++ = '0';
		480
		481	memcpy (dstp, path - nl, nl);
		482	dstp += nl;
		483	}
		484	else
		485	dstp++ = path++;
		486	#if 0
		487	else
		488	{
		489	STRLEN cl;
		490	to_utf8_fold (path, dstp, &cl);
		491	dstp += cl;
		492	path += is_utf8_char (path);
		493	}
		494	#endif
		495	}
		496
		497	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		498	}
		499	OUTPUT:
		500	RETVAL
		501
158	GdkPixbuf_noinc *	502	GdkPixbuf_noinc *
159	p7_to_pb (int w, int h, guchar *src)	503	p7_to_pb (int w, int h, SV *src_sv)
		504	PROTOTYPE: @
160	CODE:	505	CODE:
161	{	506	{
162	int x, y;	507	int x, y;
163	guchar dst, d;	508	guchar dst, d;
164	int dstr;	509	int dstr;
		510	guchar src = (guchar )SvPVbyte_nolen (src_sv);
165		511
166	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	512	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
167	dst = gdk_pixbuf_get_pixels (RETVAL);	513	dst = gdk_pixbuf_get_pixels (RETVAL);
168	dstr = gdk_pixbuf_get_rowstride (RETVAL);	514	dstr = gdk_pixbuf_get_rowstride (RETVAL);
169		515
…		…
178	}	524	}
179	}	525	}
180	OUTPUT:	526	OUTPUT:
181	RETVAL	527	RETVAL
182		528
		529	#############################################################################
		530
		531	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		532
		533	void
		534	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		535	CODE:
		536	{
		537	int w = gdk_pixbuf_get_width (pb);
		538	int h = gdk_pixbuf_get_height (pb);
		539	int x, y, i;
		540	guchar *dst;
		541	int bpp = gdk_pixbuf_get_n_channels (pb);
		542	guchar *src = gdk_pixbuf_get_pixels (pb);
		543	int sstr = gdk_pixbuf_get_rowstride (pb);
		544
		545	a85_init ();
		546
		547	for (y = 0; y < h; y++)
		548	for (x = 0; x < w; x++)
		549	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		550	a85_push (fp, src [x * bpp + y * sstr + i]);
		551
		552	a85_finish (fp);
		553	}
		554
		555	void
		556	dump_binary (PerlIO fp, GdkPixbuf pb)
		557	CODE:
		558	{
		559	int w = gdk_pixbuf_get_width (pb);
		560	int h = gdk_pixbuf_get_height (pb);
		561	int x, y, i;
		562	guchar *dst;
		563	int bpp = gdk_pixbuf_get_n_channels (pb);
		564	guchar *src = gdk_pixbuf_get_pixels (pb);
		565	int sstr = gdk_pixbuf_get_rowstride (pb);
		566
		567	for (y = 0; y < h; y++)
		568	for (x = 0; x < w; x++)
		569	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		570	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		571	}
		572
		573	#############################################################################
		574
		575	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		576
183	SV *	577	SV *
184	pb_to_p7 (GdkPixbuf *pb)	578	pb_to_hv84 (GdkPixbuf *pb)
185	CODE:	579	CODE:
186	{	580	{
187	int w = gdk_pixbuf_get_width (pb);	581	int w = gdk_pixbuf_get_width (pb);
188	int h = gdk_pixbuf_get_height (pb);	582	int h = gdk_pixbuf_get_height (pb);
189	int x, y;	583	int x, y;
190	guchar *dst;	584	guchar *dst;
191	int bpp = gdk_pixbuf_get_n_channels (pb);	585	int bpp = gdk_pixbuf_get_n_channels (pb);
192	guchar *src = gdk_pixbuf_get_pixels (pb);	586	guchar *src = gdk_pixbuf_get_pixels (pb);
193	int sstr = gdk_pixbuf_get_rowstride (pb);	587	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	#############################################################################
242
243	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
244
245	void
246	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
247	CODE:
248	{
249	int w = gdk_pixbuf_get_width (pb);
250	int h = gdk_pixbuf_get_height (pb);
251	int x, y, i;
252	guchar *dst;
253	int bpp = gdk_pixbuf_get_n_channels (pb);
254	guchar *src = gdk_pixbuf_get_pixels (pb);
255	int sstr = gdk_pixbuf_get_rowstride (pb);
256
257	a85_init ();
258
259	for (y = 0; y < h; y++)
260	for (x = 0; x < w; x++)
261	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
262	a85_push (fp, src [x * bpp + y * sstr + i]);
263
264	a85_finish (fp);
265	}
266
267	void
268	dump_binary (PerlIO fp, GdkPixbuf pb)
269	CODE:
270	{
271	int w = gdk_pixbuf_get_width (pb);
272	int h = gdk_pixbuf_get_height (pb);
273	int x, y, i;
274	guchar *dst;
275	int bpp = gdk_pixbuf_get_n_channels (pb);
276	guchar *src = gdk_pixbuf_get_pixels (pb);
277	int sstr = gdk_pixbuf_get_rowstride (pb);
278
279	for (y = 0; y < h; y++)
280	for (x = 0; x < w; x++)
281	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
282	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
283	}
284
285	#############################################################################
286
287	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
288
289	SV *
290	pb_to_hv84 (GdkPixbuf *pb)
291	CODE:
292	{
293	int w = gdk_pixbuf_get_width (pb);
294	int h = gdk_pixbuf_get_height (pb);
295	int x, y;
296	guchar *dst;
297	int bpp = gdk_pixbuf_get_n_channels (pb);
298	guchar *src = gdk_pixbuf_get_pixels (pb);
299	int sstr = gdk_pixbuf_get_rowstride (pb);
300		588
301	RETVAL = newSV (6 * 8 * 12 / 8);	589	RETVAL = newSV (6 * 8 * 12 / 8);
302	SvPOK_only (RETVAL);	590	SvPOK_only (RETVAL);
303	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	591	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
304		592
305	dst = SvPVX (RETVAL);	593	dst = (guchar *)SvPVX (RETVAL);
306		594
307	/* some primitive error distribution + random dithering */	595	/* some primitive error distribution + random dithering */
308		596
309	for (y = 0; y < h; y++)	597	for (y = 0; y < h; y++)
310	{	598	{
…		…
368	}	656	}
369	}	657	}
370	OUTPUT:	658	OUTPUT:
371	RETVAL	659	RETVAL
372		660
		661	#############################################################################
373		662
		663	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
374		664
		665	SV *
		666	extract_features (SV *ar)
		667	CODE:
		668	{
		669	int i;
		670	AV av, result;
		671
		672	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		673	croak ("Not an array ref as first argument to extract_features");
		674
		675	av = (AV *) SvRV (ar);
		676	result = newAV ();
		677
		678	for (i = 0; i <= av_len (av); ++i)
		679	{
		680	SV sv = av_fetch (av, i, 1);
		681	SV histsv = newSV (9 sizeof (float) + 1);
		682
		683	SvPOK_on (histsv);
		684	SvCUR_set (histsv, 9 * sizeof (float));
		685	float hist = (float )SvPVX (histsv);
		686
		687	struct feature f_h, f_s, f_v;
		688	feature_init (&f_h);
		689	feature_init (&f_s);
		690	feature_init (&f_v);
		691
		692	{
		693	STRLEN len;
		694	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		695	while (len >= 3)
		696	{
		697	unsigned int r, g, b, h, s, v;
		698	r = buf++; g = buf++; b = *buf++;
		699	rgb_to_hsv (r, g, b, &h, &s, &v);
		700
		701	feature_update_pass_1 (&f_h, h);
		702	feature_update_pass_1 (&f_s, s);
		703	feature_update_pass_1 (&f_v, v);
		704
		705	len -= 3;
		706	}
		707
		708	feature_finish_pass_1 (&f_h);
		709	feature_finish_pass_1 (&f_s);
		710	feature_finish_pass_1 (&f_v);
		711	}
		712
		713	{
		714	STRLEN len;
		715	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		716	while (len >= 3)
		717	{
		718	unsigned int r, g, b, h, s, v;
		719	r = buf++; g = buf++; b = *buf++;
		720	rgb_to_hsv (r, g, b, &h, &s, &v);
		721
		722	feature_update_pass_2 (&f_h, h);
		723	feature_update_pass_2 (&f_s, s);
		724	feature_update_pass_2 (&f_v, v);
		725
		726	len -= 3;
		727	}
		728
		729	feature_finish_pass_2 (&f_h);
		730	feature_finish_pass_2 (&f_s);
		731	feature_finish_pass_2 (&f_v);
		732	}
		733
		734	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		735	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		736	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
		737
		738	av_push (result, histsv);
		739	}
		740
		741	RETVAL = newRV_noinc ((SV *)result);
		742	}
		743	OUTPUT:
		744	RETVAL
		745

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Comparing CV/CV.xs (file contents): Revision 1.9 by root, Tue Apr 6 23:53:20 2004 UTC vs. Revision 1.44 by root, Sun Dec 30 16:23:23 2012 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.9 by root, Tue Apr 6 23:53:20 2004 UTC vs.
Revision 1.44 by root, Sun Dec 30 16:23:23 2012 UTC