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

Comparing CV/CV.xs (file contents):
Revision 1.29 by root, Sat Sep 24 01:25:17 2005 UTC vs.
Revision 1.53 by root, Sat Dec 23 05:27:04 2017 UTC

…		…
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#include <string.h>	5	#include <string.h>
6	#include <setjmp.h>	6	#include <setjmp.h>
		7	#include <math.h>
		8
		9	#include <magic.h>
7		10
8	#include <jpeglib.h>	11	#include <jpeglib.h>
		12	#include <jerror.h>
		13
9	#include <glib.h>	14	#include <glib.h>
10	#include <gtk/gtk.h>	15	#include <gtk/gtk.h>
		16	#include <gdk/gdkx.h>
11	#include <gdk-pixbuf/gdk-pixbuf.h>	17	#include <gdk-pixbuf/gdk-pixbuf.h>
12		18
13	#include <gperl.h>	19	#include <gperl.h>
14	#include <gtk2perl.h>	20	#include <gtk2perl.h>
15		21
		22	#include <assert.h>
		23
		24	#if WEBP
		25	#include <webp/decode.h>
		26	#endif
		27
		28	#include "perlmulticore.h"
		29
16	#define IW 80 /* MUST match Schnauer.pm! */	30	#define IW 80 /* MUST match Schnauzer.pm! */
17	#define IH 60 /* MUST match Schnauer.pm! */	31	#define IH 60 /* MUST match Schnauzer.pm! */
18		32
19	#define RAND (seed = (seed + 7141) * 54773 % 134456)	33	#define RAND (seed = (seed + 7141) * 54773 % 134456)
20		34
21	#define LINELENGTH 240	35	#define LINELENGTH 240
22		36
23	#define ELLIPSIS "\xe2\x80\xa6"	37	#define ELLIPSIS "\xe2\x80\xa6"
		38
		39	typedef char *octet_string;
		40
		41	static magic_t magic_cookie[2]; /* !mime, mime */
24		42
25	struct jpg_err_mgr	43	struct jpg_err_mgr
26	{	44	{
27	struct jpeg_error_mgr err;	45	struct jpeg_error_mgr err;
28	jmp_buf setjmp_buffer;	46	jmp_buf setjmp_buffer;
29	};	47	};
30		48
31	static void	49	static void
32	cv_error_exit (j_common_ptr cinfo)	50	cv_error_exit (j_common_ptr cinfo)
33	{	51	{
		52	cinfo->err->output_message (cinfo);
34	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);	53	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
35	}	54	}
36		55
37	static void	56	static void
38	cv_error_output (j_common_ptr cinfo)	57	cv_error_output (j_common_ptr cinfo)
39	{	58	{
		59	char msg[JMSG_LENGTH_MAX];
		60
		61	cinfo->err->format_message (cinfo, msg);
		62
		63	fprintf (stderr, "JPEG decoding error: %s\n", msg);
40	return;	64	return;
41	}	65	}
42		66
43	static void	67	static void
44	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,	68	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
…		…
65		89
66	*h &= 255;	90	*h &= 255;
67	}	91	}
68	}	92	}
69		93
		94	struct feature {
		95	float v1, v2, v3; // mean, square, cube
		96	int n;
		97	};
		98
		99	static void
		100	feature_init (struct feature *f)
		101	{
		102	f->v1 = 0.;
		103	f->v2 = 0.;
		104	f->v3 = 0.;
		105	f->n = 0;
		106	}
		107
		108	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		109	// elmex ist schuld.
		110	static void
		111	feature_update_pass_1 (struct feature *f, unsigned int v)
		112	{
		113	f->v1 += v;
		114	f->n += 1;
		115	}
		116
		117	static void
		118	feature_finish_pass_1 (struct feature *f)
		119	{
		120	if (f->n < 1)
		121	return;
		122
		123	f->v1 /= f->n;
		124	}
		125
		126	static void
		127	feature_update_pass_2 (struct feature *f, unsigned int v)
		128	{
		129	float d = v - f->v1;
		130
		131	f->v2 += d * d;
		132	f->v3 += d * d * d;
		133	}
		134
		135	static void
		136	feature_finish_pass_2 (struct feature *f)
		137	{
		138	if (f->n < 1)
		139	return;
		140
		141	f->v2 /= f->n;
		142	f->v3 /= f->n;
		143
		144	f->v1 /= 255.;
		145	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		146	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		147	}
		148
70	static guint32 a85_val;	149	static guint32 a85_val;
71	static guint a85_cnt;	150	static guint a85_cnt;
72	static guchar a85_buf[LINELENGTH], *a85_ptr;	151	static guchar a85_buf[LINELENGTH], *a85_ptr;
73		152
74	static void	153	static void
…		…
86	if (!--a85_cnt)	165	if (!--a85_cnt)
87	{	166	{
88	a85_cnt = 4;	167	a85_cnt = 4;
89	if (a85_val)	168	if (a85_val)
90	{	169	{
91	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;	170	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
92	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;	171	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
93	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;	172	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
94	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;	173	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
95	a85_ptr[0] = (a85_val ) + 33;	174	a85_ptr[0] = (a85_val ) + 33;
96		175
97	a85_ptr += 5;	176	a85_ptr += 5;
98	}	177	}
…		…
122	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	201	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
123	}	202	}
124		203
125	/////////////////////////////////////////////////////////////////////////////	204	/////////////////////////////////////////////////////////////////////////////
126		205
		206	static void cv_ms_init (j_decompress_ptr cinfo)
		207	{
		208	}
		209
		210	static void cv_ms_term (j_decompress_ptr cinfo)
		211	{
		212	}
		213
		214	static boolean cv_ms_fill (j_decompress_ptr cinfo)
		215	{
		216	ERREXIT (cinfo, JERR_INPUT_EMPTY);
		217
		218	return TRUE;
		219	}
		220
		221	static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes)
		222	{
		223	if (num_bytes > 0)
		224	{
		225	struct jpeg_source_mgr src = (struct jpeg_source_mgr )cinfo->src;
		226
		227	src->next_input_byte += num_bytes;
		228	src->bytes_in_buffer -= num_bytes;
		229	}
		230	}
		231
		232	static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen)
		233	{
		234	struct jpeg_source_mgr *src;
		235
		236	if (!cinfo->src)
		237	cinfo->src = (struct jpeg_source_mgr *)
		238	(*cinfo->mem->alloc_small) (
		239	(j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)
		240	);
		241
		242	src = (struct jpeg_source_mgr *)cinfo->src;
		243	src->init_source = cv_ms_init;
		244	src->fill_input_buffer = cv_ms_fill;
		245	src->skip_input_data = cv_ms_skip;
		246	src->resync_to_restart = jpeg_resync_to_restart;
		247	src->term_source = cv_ms_term;
		248	src->next_input_byte = (JOCTET *)buf;
		249	src->bytes_in_buffer = buflen;
		250	}
		251
		252	/////////////////////////////////////////////////////////////////////////////
		253
127	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	254	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
128		255
129	PROTOTYPES: ENABLE	256	PROTOTYPES: ENABLE
130		257
131	# missing function in perl. really :)	258	# missing function in perl. really :)
…		…
143	}	270	}
144		271
145	OUTPUT:	272	OUTPUT:
146	RETVAL	273	RETVAL
147		274
		275	const char *
		276	magic (SV *path_or_data)
		277	ALIAS:
		278	magic = 0
		279	magic_mime = 1
		280	magic_buffer = 2
		281	magic_buffer_mime = 3
		282	CODE:
		283	{
		284	STRLEN len;
		285	char *data = SvPVbyte (path_or_data, len);
		286
		287	if (!magic_cookie[0])
		288	{
		289	magic_cookie[0] = magic_open (MAGIC_SYMLINK);
		290	magic_cookie[1] = magic_open (MAGIC_SYMLINK \| MAGIC_MIME_TYPE);
		291	magic_load (magic_cookie[0], 0);
		292	magic_load (magic_cookie[1], 0);
		293	}
		294
		295	perlinterp_release ();
		296
		297	RETVAL = ix & 2
		298	? magic_buffer (magic_cookie[ix & 1], data, len)
		299	: magic_file (magic_cookie[ix & 1], data);
		300
		301	perlinterp_acquire ();
		302	}
		303	OUTPUT:
		304	RETVAL
		305
148	# missing in Gtk2 perl module	306	# missing/broken in Gtk2 perl module
		307
		308	void
		309	gdk_window_clear_hints (GdkWindow *window)
		310	CODE:
		311	gdk_window_set_geometry_hints (window, 0, 0);
149		312
150	gboolean	313	gboolean
151	gdk_net_wm_supports (GdkAtom property)	314	gdk_net_wm_supports (GdkAtom property)
152	CODE:	315	CODE:
153	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)	316	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
…		…
159	RETVAL	322	RETVAL
160		323
161	GdkPixbuf_noinc *	324	GdkPixbuf_noinc *
162	dealpha_expose (GdkPixbuf *pb)	325	dealpha_expose (GdkPixbuf *pb)
163	CODE:	326	CODE:
		327	perlinterp_release ();
164	{	328	{
165	int w = gdk_pixbuf_get_width (pb);	329	int w = gdk_pixbuf_get_width (pb);
166	int h = gdk_pixbuf_get_height (pb);	330	int h = gdk_pixbuf_get_height (pb);
167	int bpp = gdk_pixbuf_get_n_channels (pb);	331	int bpp = gdk_pixbuf_get_n_channels (pb);
168	int x, y, i;	332	int x, y, i;
…		…
177	for (x = 0; x < w; x++)	341	for (x = 0; x < w; x++)
178	for (y = 0; y < h; y++)	342	for (y = 0; y < h; y++)
179	for (i = 0; i < 3; i++)	343	for (i = 0; i < 3; i++)
180	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];	344	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
181	}	345	}
		346	perlinterp_acquire ();
182	OUTPUT:	347	OUTPUT:
183	RETVAL	348	RETVAL
184		349
185	GdkPixbuf_noinc *	350	GdkPixbuf_noinc *
186	rotate (GdkPixbuf *pb, int angle)	351	rotate (GdkPixbuf *pb, int angle)
187	CODE:	352	CODE:
		353	perlinterp_release ();
		354	if (angle < 0)
		355	angle += 360;
188	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE	356	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
189	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE	357	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
190	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN	358	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
191	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE	359	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
192	: angle);	360	: angle);
		361	perlinterp_acquire ();
193	OUTPUT:	362	OUTPUT:
194	RETVAL	363	RETVAL
195		364
		365	const char *
		366	filetype (SV *image_data)
		367	CODE:
		368	{
		369	STRLEN data_len;
		370	U8 *data = SvPVbyte (image_data, data_len);
		371
		372	if (data_len >= 20
		373	&& data[0] == 0xff
		374	&& data[1] == 0xd8
		375	&& data[2] == 0xff)
		376	RETVAL = "jpg";
		377	else if (data_len >= 12
		378	&& data[ 0] == (U8)'R'
		379	&& data[ 1] == (U8)'I'
		380	&& data[ 2] == (U8)'F'
		381	&& data[ 3] == (U8)'F'
		382	&& data[ 8] == (U8)'W'
		383	&& data[ 9] == (U8)'E'
		384	&& data[10] == (U8)'B'
		385	&& data[11] == (U8)'P')
		386	RETVAL = "webp";
		387	else if (data_len >= 16
		388	&& data[ 0] == 0x89
		389	&& data[ 1] == (U8)'P'
		390	&& data[ 2] == (U8)'N'
		391	&& data[ 3] == (U8)'G'
		392	&& data[ 4] == 0x0d
		393	&& data[ 5] == 0x0a
		394	&& data[ 6] == 0x1a
		395	&& data[ 7] == 0x0a)
		396	RETVAL = "png";
		397	else
		398	RETVAL = "other";
		399	}
		400	OUTPUT:
		401	RETVAL
		402
196	GdkPixbuf_noinc *	403	GdkPixbuf_noinc *
197	load_jpeg (SV *path, int thumbnail=0)	404	decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		405	CODE:
		406	{
		407	#if WEBP
		408	guchar *data;
		409	STRLEN data_size;
		410	int alpha;
		411	WebPDecoderConfig config;
		412	int inw, inh;
		413
		414	data = SvPVbyte (image_data, data_size);
		415
		416	perlinterp_release ();
		417
		418	RETVAL = 0;
		419
		420	if (!WebPInitDecoderConfig (&config))
		421	goto err;
		422
		423	config.options.use_threads = 1;
		424
		425	if (WebPGetFeatures (data, data_size, &config.input) != VP8_STATUS_OK)
		426	goto err;
		427
		428	inw = config.input.width;
		429	inh = config.input.height;
		430
		431	if (thumbnail)
		432	{
		433	if (inw * ih > inh * iw)
		434	ih = (iw * inh + inw - 1) / inw;
		435	else
		436	iw = (ih * inw + inh - 1) / inh;
		437
		438	config.options.bypass_filtering = 1;
		439	config.options.no_fancy_upsampling = 1;
		440
		441	config.options.use_scaling = 1;
		442	config.options.scaled_width = iw;
		443	config.options.scaled_height = ih;
		444	}
		445	else
		446	{
		447	iw = inw;
		448	ih = inh;
		449	}
		450
		451	alpha = config.input.has_alpha;
		452
		453	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!alpha, 8, iw, ih);
		454	if (!RETVAL)
		455	goto err;
		456
		457	config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
		458	config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
		459	config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
		460	config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
		461	config.output.is_external_memory = 1;
		462
		463	if (WebPDecode (data, data_size, &config) != VP8_STATUS_OK)
		464	{
		465	g_object_unref (RETVAL);
		466	RETVAL = 0;
		467	goto err;
		468	}
		469
		470	err:
		471	perlinterp_acquire ();
		472	#else
		473	croak ("load_webp: webp not enabled at compile time");
		474	#endif
		475	}
		476	OUTPUT:
		477	RETVAL
		478
		479	GdkPixbuf_noinc *
		480	decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
198	CODE:	481	CODE:
199	{	482	{
200	struct jpeg_decompress_struct cinfo;	483	struct jpeg_decompress_struct cinfo;
201	struct jpg_err_mgr jerr;	484	struct jpg_err_mgr jerr;
202	guchar *data;
203	int rs;	485	int rs;
204	FILE *fp;
205	volatile GdkPixbuf *pb = 0;	486	volatile GdkPixbuf *pb = 0;
206	gchar *filename;	487	STRLEN data_len;
		488	guchar *data = SvPVbyte (image_data, data_len);
207		489
208	RETVAL = 0;	490	RETVAL = 0;
209		491
210	filename = g_filename_from_utf8 (SvPVutf8_nolen (path), -1, 0, 0, 0);	492	perlinterp_release ();
211	fp = fopen (filename, "rb");
212	g_free (filename);
213
214	if (!fp)
215	XSRETURN_UNDEF;
216		493
217	cinfo.err = jpeg_std_error (&jerr.err);	494	cinfo.err = jpeg_std_error (&jerr.err);
218		495
219	jerr.err.error_exit = cv_error_exit;	496	jerr.err.error_exit = cv_error_exit;
220	jerr.err.output_message = cv_error_output;	497	jerr.err.output_message = cv_error_output;
221		498
222	if ((rs = setjmp (jerr.setjmp_buffer)))	499	if ((rs = setjmp (jerr.setjmp_buffer)))
223	{	500	{
224	fclose (fp);
225	jpeg_destroy_decompress (&cinfo);	501	jpeg_destroy_decompress (&cinfo);
226		502
227	if (pb)	503	if (pb)
228	g_object_unref ((gpointer)pb);	504	g_object_unref ((gpointer)pb);
229		505
		506	perlinterp_acquire ();
230	XSRETURN_UNDEF;	507	XSRETURN_UNDEF;
231	}	508	}
232		509
233	jpeg_create_decompress (&cinfo);	510	jpeg_create_decompress (&cinfo);
		511	cv_jpeg_mem_src (&cinfo, data, data_len);
234		512
235	jpeg_stdio_src (&cinfo, fp);
236	jpeg_read_header (&cinfo, TRUE);	513	jpeg_read_header (&cinfo, TRUE);
237		514
238	cinfo.dct_method = JDCT_DEFAULT;	515	cinfo.dct_method = JDCT_DEFAULT;
239	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */	516	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
240	cinfo.do_block_smoothing = FALSE;	517	cinfo.do_block_smoothing = FALSE;
…		…
250	{	527	{
251	cinfo.dct_method = JDCT_FASTEST;	528	cinfo.dct_method = JDCT_FASTEST;
252	cinfo.do_fancy_upsampling = FALSE;	529	cinfo.do_fancy_upsampling = FALSE;
253		530
254	while (cinfo.scale_denom < 8	531	while (cinfo.scale_denom < 8
255	&& cinfo.output_width >= IW*4	532	&& cinfo.output_width >= iw*4
256	&& cinfo.output_height >= IH*4)	533	&& cinfo.output_height >= ih*4)
257	{	534	{
258	cinfo.scale_denom <<= 1;	535	cinfo.scale_denom <<= 1;
259	jpeg_calc_output_dimensions (&cinfo);	536	jpeg_calc_output_dimensions (&cinfo);
260	}	537	}
261	}	538	}
262		539
		540	if (cinfo.output_components != 3)
		541	longjmp (jerr.setjmp_buffer, 3);
		542
		543	if (cinfo.jpeg_color_space == JCS_YCCK \|\| cinfo.jpeg_color_space == JCS_CMYK)
		544	{
		545	cinfo.out_color_space = JCS_CMYK;
		546	cinfo.output_components = 4;
		547	}
		548
263	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);	549	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
264	if (!RETVAL)	550	if (!RETVAL)
265	longjmp (jerr.setjmp_buffer, 2);	551	longjmp (jerr.setjmp_buffer, 2);
266		552
267	data = gdk_pixbuf_get_pixels (RETVAL);	553	data = gdk_pixbuf_get_pixels (RETVAL);
268	rs = gdk_pixbuf_get_rowstride (RETVAL);	554	rs = gdk_pixbuf_get_rowstride (RETVAL);
269
270	if (cinfo.output_components != 3)
271	longjmp (jerr.setjmp_buffer, 3);
272		555
273	jpeg_start_decompress (&cinfo);	556	jpeg_start_decompress (&cinfo);
274		557
275	while (cinfo.output_scanline < cinfo.output_height)	558	while (cinfo.output_scanline < cinfo.output_height)
276	{	559	{
…		…
283	rp [3] = (guchar *)rp [2] + rs;	566	rp [3] = (guchar *)rp [2] + rs;
284		567
285	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);	568	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
286	}	569	}
287		570
		571	if (cinfo.out_color_space == JCS_CMYK)
		572	{
		573	guchar end = data + cinfo.output_height rs;
		574
		575	while (data < end)
		576	{
		577	U32 c = data [0];
		578	U32 m = data [1];
		579	U32 y = data [2];
		580	U32 k = data [3];
		581
		582	if (0)
		583	if (cinfo.Adobe_transform == 2)
		584	{
		585	c ^= 0xff;
		586	m ^= 0xff;
		587	y ^= 0xff;
		588	k ^= 0xff;
		589	}
		590
		591	data [0] = (c * k + 0x80) / 0xff;
		592	data [1] = (m * k + 0x80) / 0xff;
		593	data [2] = (y * k + 0x80) / 0xff;
		594	data [3] = 0xff;
		595
		596	data += 4;
		597	}
		598	}
		599
288	jpeg_finish_decompress (&cinfo);	600	jpeg_finish_decompress (&cinfo);
289	fclose (fp);
290	jpeg_destroy_decompress (&cinfo);	601	jpeg_destroy_decompress (&cinfo);
		602	perlinterp_acquire ();
291	}	603	}
292	OUTPUT:	604	OUTPUT:
293	RETVAL	605	RETVAL
294		606
		607	void
		608	compare (GdkPixbuf a, GdkPixbuf b)
		609	PPCODE:
		610	perlinterp_release ();
		611	{
		612	int w = gdk_pixbuf_get_width (a);
		613	int h = gdk_pixbuf_get_height (a);
		614
		615	int sa = gdk_pixbuf_get_rowstride (a);
		616	int sb = gdk_pixbuf_get_rowstride (b);
		617
		618	guchar *pa = gdk_pixbuf_get_pixels (a);
		619	guchar *pb = gdk_pixbuf_get_pixels (b);
		620
		621	int x, y;
		622
		623	assert (w == gdk_pixbuf_get_width (b));
		624	assert (h == gdk_pixbuf_get_height (b));
		625
		626	assert (gdk_pixbuf_get_n_channels (a) == 3);
		627	assert (gdk_pixbuf_get_n_channels (b) == 3);
		628
		629	double diff = 0.;
		630	int peak = 0;
		631
		632	if (w && h)
		633	for (y = 0; y < h; y++)
		634	{
		635	guchar pa_ = pa + y sa;
		636	guchar pb_ = pb + y sb;
		637
		638	for (x = 0; x < w; x++)
		639	{
		640	int d;
		641
		642	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		643	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		644	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		645	}
		646	}
		647
		648	perlinterp_acquire ();
		649
		650	EXTEND (SP, 2);
		651	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		652	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		653	}
		654
295	#############################################################################	655	#############################################################################
296		656
297	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	657	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
		658
		659	# currently only works for filenames (octet strings)
298		660
299	SV *	661	SV *
300	foldcase (SV *pathsv)	662	foldcase (SV *pathsv)
301	PROTOTYPE: $	663	PROTOTYPE: $
302	CODE:	664	CODE:
303	{	665	{
304	STRLEN plen;	666	STRLEN plen;
305	U8 path = (U8 )SvPVutf8 (pathsv, plen);	667	U8 path = (U8 )SvPV (pathsv, plen);
306	U8 *pend = path + plen;	668	U8 *pend = path + plen;
307	U8 dst [plen * 6 * 3], *dstp = dst;	669	U8 dst [plen * 6 * 3], *dstp = dst;
308		670
309	while (path < pend)	671	while (path < pend)
310	{	672	{
311	U8 ch = *path;	673	U8 ch = *path;
312		674
313	if (ch >= 'a' && ch <= 'z')	675	if (ch >= 'a' && ch <= 'z')
314	dstp++ = path++;	676	dstp++ = path++;
		677	else if (ch >= 'A' && ch <= 'Z')
		678	dstp++ = path++ + ('a' - 'A');
315	else if (ch >= '0' && ch <= '9')	679	else if (ch >= '0' && ch <= '9')
316	{	680	{
317	STRLEN el, nl = 0;	681	STRLEN el, nl = 0;
318	while (path >= '0' && path <= '9' && path < pend)	682	while (path >= '0' && path <= '9' && path < pend)
319	path++, nl++;	683	path++, nl++;
…		…
322	*dstp++ = '0';	686	*dstp++ = '0';
323		687
324	memcpy (dstp, path - nl, nl);	688	memcpy (dstp, path - nl, nl);
325	dstp += nl;	689	dstp += nl;
326	}	690	}
		691	else
		692	dstp++ = path++;
		693	#if 0
327	else	694	else
328	{	695	{
329	STRLEN cl;	696	STRLEN cl;
330	to_utf8_fold (path, dstp, &cl);	697	to_utf8_fold (path, dstp, &cl);
331	dstp += cl;	698	dstp += cl;
332	path += is_utf8_char (path);	699	path += is_utf8_char (path);
333	}	700	}
		701	#endif
334	}	702	}
335		703
336	RETVAL = newSVpvn ((const char *)dst, dstp - dst);	704	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
337	}	705	}
338	OUTPUT:	706	OUTPUT:
…		…
500	#############################################################################	868	#############################################################################
501		869
502	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster	870	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
503		871
504	SV *	872	SV *
505	make_histograms (SV *ar)	873	extract_features (SV *ar)
506	CODE:	874	CODE:
507	{	875	{
508	int i;	876	int i;
509	AV av, result;	877	AV av, result;
510		878
511	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)	879	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
512	croak ("Not an array ref as first argument to make_histogram");	880	croak ("Not an array ref as first argument to extract_features");
513		881
514	av = (AV *) SvRV (ar);	882	av = (AV *) SvRV (ar);
515	result = newAV ();	883	result = newAV ();
516		884
517	for (i = 0; i <= av_len (av); ++i)	885	for (i = 0; i <= av_len (av); ++i)
518	{	886	{
519	const int HISTSIZE = 64;
520
521	int j;
522	SV sv = av_fetch (av, i, 1);	887	SV sv = av_fetch (av, i, 1);
523	STRLEN len;
524	char *buf = SvPVbyte (sv, len);
525
526	int tmphist[HISTSIZE];
527	float *hist;
528
529	SV histsv = newSV (HISTSIZE sizeof (float) + 1);	888	SV histsv = newSV (9 sizeof (float) + 1);
		889
530	SvPOK_on (histsv);	890	SvPOK_on (histsv);
531	SvCUR_set (histsv, HISTSIZE * sizeof (float));	891	SvCUR_set (histsv, 9 * sizeof (float));
532	hist = (float *)SvPVX (histsv);	892	float hist = (float )SvPVX (histsv);
533		893
534	Zero (tmphist, sizeof (tmphist), char);	894	struct feature f_h, f_s, f_v;
		895	feature_init (&f_h);
		896	feature_init (&f_s);
		897	feature_init (&f_v);
535		898
536	for (j = len; j--; )
537	{
538	unsigned int idx
539	= ((*buf & 0xc0) >> 2)
540	\| ((*buf & 0x18) >> 1)
541	\| (*buf & 0x03);
542
543	++tmphist[idx];
544	++buf;
545	}
546		899	{
547	for (j = 0; j < HISTSIZE; ++j)	900	STRLEN len;
548	hist[j] = (float)tmphist[j] / (len + 1e-30);	901	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		902	while (len >= 3)
		903	{
		904	unsigned int r, g, b, h, s, v;
		905	r = buf++; g = buf++; b = *buf++;
		906	rgb_to_hsv (r, g, b, &h, &s, &v);
		907
		908	feature_update_pass_1 (&f_h, h);
		909	feature_update_pass_1 (&f_s, s);
		910	feature_update_pass_1 (&f_v, v);
		911
		912	len -= 3;
		913	}
		914
		915	feature_finish_pass_1 (&f_h);
		916	feature_finish_pass_1 (&f_s);
		917	feature_finish_pass_1 (&f_v);
		918	}
		919
		920	{
		921	STRLEN len;
		922	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		923	while (len >= 3)
		924	{
		925	unsigned int r, g, b, h, s, v;
		926	r = buf++; g = buf++; b = *buf++;
		927	rgb_to_hsv (r, g, b, &h, &s, &v);
		928
		929	feature_update_pass_2 (&f_h, h);
		930	feature_update_pass_2 (&f_s, s);
		931	feature_update_pass_2 (&f_v, v);
		932
		933	len -= 3;
		934	}
		935
		936	feature_finish_pass_2 (&f_h);
		937	feature_finish_pass_2 (&f_s);
		938	feature_finish_pass_2 (&f_v);
		939	}
		940
		941	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		942	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		943	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
549		944
550	av_push (result, histsv);	945	av_push (result, histsv);
551	}	946	}
552		947
553	RETVAL = newRV_noinc ((SV *)result);	948	RETVAL = newRV_noinc ((SV *)result);
554	}	949	}
555	OUTPUT:	950	OUTPUT:
556	RETVAL	951	RETVAL
557		952
558

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Comparing CV/CV.xs (file contents): Revision 1.29 by root, Sat Sep 24 01:25:17 2005 UTC vs. Revision 1.53 by root, Sat Dec 23 05:27:04 2017 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.29 by root, Sat Sep 24 01:25:17 2005 UTC vs.
Revision 1.53 by root, Sat Dec 23 05:27:04 2017 UTC