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

Comparing CV/CV.xs (file contents):
Revision 1.17 by root, Wed Jul 20 06:20:36 2005 UTC vs.
Revision 1.50 by root, Sat Dec 23 03:30:28 2017 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>
5	#include <setjmp.h>	6	#include <setjmp.h>
		7	#include <math.h>
		8
		9	#include <magic.h>
6		10
7	#include <jpeglib.h>	11	#include <jpeglib.h>
		12	#include <glib.h>
		13	#include <gtk/gtk.h>
		14	#include <gdk/gdkx.h>
8	#include <gdk-pixbuf/gdk-pixbuf.h>	15	#include <gdk-pixbuf/gdk-pixbuf.h>
9		16
10	#include <gperl.h>	17	#include <gperl.h>
11	#include <gtk2perl.h>	18	#include <gtk2perl.h>
12		19
		20	#include <assert.h>
		21
		22	#if WEBP
		23	#include <webp/decode.h>
		24	#endif
		25
		26	#include "perlmulticore.h"
		27
13	#define IW 80 /* MUST match Schnauer.pm! */	28	#define IW 80 /* MUST match Schnauzer.pm! */
14	#define IH 60 /* MUST match Schnauer.pm! */	29	#define IH 60 /* MUST match Schnauzer.pm! */
15		30
16	#define RAND (seed = (seed + 7141) * 54773 % 134456)	31	#define RAND (seed = (seed + 7141) * 54773 % 134456)
17		32
18	#define LINELENGTH 240	33	#define LINELENGTH 240
19		34
20	#define ELLIPSIS "\xe2\x80\xa6"	35	#define ELLIPSIS "\xe2\x80\xa6"
		36
		37	typedef char *octet_string;
21		38
22	struct jpg_err_mgr	39	struct jpg_err_mgr
23	{	40	{
24	struct jpeg_error_mgr err;	41	struct jpeg_error_mgr err;
25	jmp_buf setjmp_buffer;	42	jmp_buf setjmp_buffer;
26	};	43	};
27		44
28	static void	45	static void
29	cv_error_exit (j_common_ptr cinfo)	46	cv_error_exit (j_common_ptr cinfo)
30	{	47	{
		48	cinfo->err->output_message (cinfo);
31	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);	49	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
32	}	50	}
33		51
34	static void	52	static void
35	cv_error_output (j_common_ptr cinfo)	53	cv_error_output (j_common_ptr cinfo)
36	{	54	{
		55	char msg[JMSG_LENGTH_MAX];
		56
		57	cinfo->err->format_message (cinfo, msg);
		58
		59	fprintf (stderr, "JPEG decoding error: %s\n", msg);
37	return;	60	return;
38	}	61	}
39		62
40	static void	63	static void
41	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,	64	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
62		85
63	*h &= 255;	86	*h &= 255;
64	}	87	}
65	}	88	}
66		89
		90	struct feature {
		91	float v1, v2, v3; // mean, square, cube
		92	int n;
		93	};
		94
		95	static void
		96	feature_init (struct feature *f)
		97	{
		98	f->v1 = 0.;
		99	f->v2 = 0.;
		100	f->v3 = 0.;
		101	f->n = 0;
		102	}
		103
		104	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		105	// elmex ist schuld.
		106	static void
		107	feature_update_pass_1 (struct feature *f, unsigned int v)
		108	{
		109	f->v1 += v;
		110	f->n += 1;
		111	}
		112
		113	static void
		114	feature_finish_pass_1 (struct feature *f)
		115	{
		116	if (f->n < 1)
		117	return;
		118
		119	f->v1 /= f->n;
		120	}
		121
		122	static void
		123	feature_update_pass_2 (struct feature *f, unsigned int v)
		124	{
		125	float d = v - f->v1;
		126
		127	f->v2 += d * d;
		128	f->v3 += d * d * d;
		129	}
		130
		131	static void
		132	feature_finish_pass_2 (struct feature *f)
		133	{
		134	if (f->n < 1)
		135	return;
		136
		137	f->v2 /= f->n;
		138	f->v3 /= f->n;
		139
		140	f->v1 /= 255.;
		141	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		142	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		143	}
		144
67	static guint32 a85_val;	145	static guint32 a85_val;
68	static guint a85_cnt;	146	static guint a85_cnt;
69	static guchar a85_buf[LINELENGTH], *a85_ptr;	147	static guchar a85_buf[LINELENGTH], *a85_ptr;
70		148
71	static void	149	static void
…		…
83	if (!--a85_cnt)	161	if (!--a85_cnt)
84	{	162	{
85	a85_cnt = 4;	163	a85_cnt = 4;
86	if (a85_val)	164	if (a85_val)
87	{	165	{
88	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;	166	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
89	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;	167	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
90	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;	168	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
91	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;	169	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
92	a85_ptr[0] = (a85_val ) + 33;	170	a85_ptr[0] = (a85_val ) + 33;
93		171
94	a85_ptr += 5;	172	a85_ptr += 5;
95	}	173	}
…		…
123		201
124	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	202	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
125		203
126	PROTOTYPES: ENABLE	204	PROTOTYPES: ENABLE
127		205
		206	# missing function in perl. really :)
		207	int
		208	common_prefix_length (a, b)
		209	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		210	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		211	CODE:
		212	RETVAL = 0;
		213
		214	while (a == b && *a)
		215	{
		216	RETVAL += (*a & 0xc0) != 0x80;
		217	a++, b++;
		218	}
		219
		220	OUTPUT:
		221	RETVAL
		222
		223	const char *
		224	magic (octet_string path)
		225	CODE:
		226	{
		227	static magic_t cookie;
		228
		229	if (!cookie)
		230	{
		231	cookie = magic_open (MAGIC_SYMLINK);
		232
		233	if (cookie)
		234	magic_load (cookie, 0);
		235	else
		236	XSRETURN_UNDEF;
		237	}
		238
		239	RETVAL = magic_file (cookie, path);
		240	}
		241	OUTPUT:
		242	RETVAL
		243
		244	const char *
		245	magic_mime (octet_string path)
		246	CODE:
		247	{
		248	static magic_t cookie;
		249
		250	if (!cookie)
		251	{
		252	cookie = magic_open (MAGIC_MIME \| MAGIC_SYMLINK);
		253
		254	if (cookie)
		255	magic_load (cookie, 0);
		256	else
		257	XSRETURN_UNDEF;
		258	}
		259
		260	perlinterp_release ();
		261	RETVAL = magic_file (cookie, path);
		262	perlinterp_acquire ();
		263	}
		264	OUTPUT:
		265	RETVAL
		266
		267	# missing/broken in Gtk2 perl module
		268
		269	void
		270	gdk_window_clear_hints (GdkWindow *window)
		271	CODE:
		272	gdk_window_set_geometry_hints (window, 0, 0);
		273
		274	gboolean
		275	gdk_net_wm_supports (GdkAtom property)
		276	CODE:
		277	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		278	RETVAL = gdk_net_wm_supports (property);
		279	#else
		280	RETVAL = 0;
		281	#endif
		282	OUTPUT:
		283	RETVAL
		284
128	GdkPixbuf_noinc *	285	GdkPixbuf_noinc *
129	transpose (GdkPixbuf *pb)	286	dealpha_expose (GdkPixbuf *pb)
130	CODE:	287	CODE:
		288	perlinterp_release ();
131	{	289	{
132	int w = gdk_pixbuf_get_width (pb);	290	int w = gdk_pixbuf_get_width (pb);
133	int h = gdk_pixbuf_get_height (pb);	291	int h = gdk_pixbuf_get_height (pb);
134	int bpp = gdk_pixbuf_get_n_channels (pb);	292	int bpp = gdk_pixbuf_get_n_channels (pb);
135	int x, y, i;	293	int x, y, i;
136	guchar src = gdk_pixbuf_get_pixels (pb), dst;	294	guchar src = gdk_pixbuf_get_pixels (pb), dst;
137	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	295	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
138		296
139	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	297	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
140		298
141	dst = gdk_pixbuf_get_pixels (RETVAL);	299	dst = gdk_pixbuf_get_pixels (RETVAL);
142	dstr = gdk_pixbuf_get_rowstride (RETVAL);	300	dstr = gdk_pixbuf_get_rowstride (RETVAL);
143		301
144	for (y = 0; y < h; y++)
145	for (x = 0; x < w; x++)	302	for (x = 0; x < w; x++)
		303	for (y = 0; y < h; y++)
146	for (i = 0; i < bpp; i++)	304	for (i = 0; i < 3; i++)
147	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	305	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
148	}	306	}
		307	perlinterp_acquire ();
149	OUTPUT:	308	OUTPUT:
150	RETVAL	309	RETVAL
151		310
152	GdkPixbuf_noinc *	311	GdkPixbuf_noinc *
153	flop (GdkPixbuf *pb)	312	rotate (GdkPixbuf *pb, int angle)
154	CODE:	313	CODE:
155	{	314	perlinterp_release ();
156	int w = gdk_pixbuf_get_width (pb);	315	if (angle < 0)
157	int h = gdk_pixbuf_get_height (pb);	316	angle += 360;
158	int bpp = gdk_pixbuf_get_n_channels (pb);	317	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
159	int x, y, i;	318	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
160	guchar src = gdk_pixbuf_get_pixels (pb), dst;	319	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
161	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	320	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
162		321	: angle);
163	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	322	perlinterp_acquire ();
164
165	dst = gdk_pixbuf_get_pixels (RETVAL);
166	dstr = gdk_pixbuf_get_rowstride (RETVAL);
167
168	for (y = 0; y < h; y++)
169	for (x = 0; x < w; x++)
170	for (i = 0; i < bpp; i++)
171	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
172	}
173	OUTPUT:	323	OUTPUT:
174	RETVAL	324	RETVAL
175		325
176	GdkPixbuf_noinc *	326	GdkPixbuf_noinc *
177	load_jpeg (char *path, int thumbnail=0)	327	load_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		328	CODE:
		329	{
		330	#if WEBP
		331	STRLEN data_size;
		332	guchar *data = SvPVbyte (image_data, data_size);
		333	int alpha;
		334	WebPDecoderConfig config;
		335
		336	perlinterp_release ();
		337
		338	RETVAL = 0;
		339
		340	if (!WebPInitDecoderConfig (&config))
		341	goto err;
		342
		343	config.options.use_threads = 1;
		344
		345	if (thumbnail)
		346	{
		347	config.options.bypass_filtering = 1;
		348	config.options.no_fancy_upsampling = 1;
		349
		350	config.options.use_scaling = 1;
		351	config.options.scaled_width = iw;
		352	config.options.scaled_height = ih;
		353	}
		354	else
		355	{
		356	iw = config.input.width;
		357	ih = config.input.height;
		358	}
		359
		360	if (WebPGetFeatures (data, data_size, &config.input) != VP8_STATUS_OK)
		361	goto err;
		362
		363	alpha = config.input.has_alpha;
		364
		365	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!alpha, 8, iw, ih);
		366	if (!RETVAL)
		367	goto err;
		368
		369	config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
		370	config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
		371	config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
		372	config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
		373	config.output.is_external_memory = 1;
		374
		375	if (WebPDecode (data, data_size, &config) != VP8_STATUS_OK)
		376	{
		377	g_object_unref (RETVAL);
		378	RETVAL = 0;
		379	goto err;
		380	}
		381
		382	err:
		383	perlinterp_acquire ();
		384	#else
		385	croak ("load_webp: webp not enabled at compile time");
		386	#endif
		387	}
		388	OUTPUT:
		389	RETVAL
		390
		391	GdkPixbuf_noinc *
		392	load_jpeg (SV *path, int thumbnail = 0, int iw = 0, int ih = 0)
178	CODE:	393	CODE:
179	{	394	{
180	struct jpeg_decompress_struct cinfo;	395	struct jpeg_decompress_struct cinfo;
181	struct jpg_err_mgr jerr;	396	struct jpg_err_mgr jerr;
182	guchar *data;	397	guchar *data;
183	int rs;	398	int rs;
184	FILE *fp;	399	FILE *fp;
185	volatile GdkPixbuf *pb = 0;	400	volatile GdkPixbuf *pb = 0;
		401
186	RETVAL = 0;	402	RETVAL = 0;
187		403
188	if (!(fp = fopen (path, "rb")))	404	fp = fopen (SvPVbyte_nolen (path), "rb");
		405
		406	if (!fp)
189	XSRETURN_UNDEF;	407	XSRETURN_UNDEF;
		408
		409	perlinterp_release ();
190		410
191	cinfo.err = jpeg_std_error (&jerr.err);	411	cinfo.err = jpeg_std_error (&jerr.err);
192		412
193	jerr.err.error_exit = cv_error_exit;	413	jerr.err.error_exit = cv_error_exit;
194	jerr.err.output_message = cv_error_output;	414	jerr.err.output_message = cv_error_output;
…		…
199	jpeg_destroy_decompress (&cinfo);	419	jpeg_destroy_decompress (&cinfo);
200		420
201	if (pb)	421	if (pb)
202	g_object_unref ((gpointer)pb);	422	g_object_unref ((gpointer)pb);
203		423
		424	perlinterp_acquire ();
204	XSRETURN_UNDEF;	425	XSRETURN_UNDEF;
205	}	426	}
206		427
207	jpeg_create_decompress (&cinfo);	428	jpeg_create_decompress (&cinfo);
208		429
…		…
224	{	445	{
225	cinfo.dct_method = JDCT_FASTEST;	446	cinfo.dct_method = JDCT_FASTEST;
226	cinfo.do_fancy_upsampling = FALSE;	447	cinfo.do_fancy_upsampling = FALSE;
227		448
228	while (cinfo.scale_denom < 8	449	while (cinfo.scale_denom < 8
229	&& (cinfo.output_width >> 1) >= IW	450	&& cinfo.output_width >= iw*4
230	&& (cinfo.output_height >> 1) >= IH)	451	&& cinfo.output_height >= ih*4)
231	{	452	{
232	cinfo.scale_denom <<= 1;	453	cinfo.scale_denom <<= 1;
233	jpeg_calc_output_dimensions (&cinfo);	454	jpeg_calc_output_dimensions (&cinfo);
234	}	455	}
235	}	456	}
236		457
		458	if (cinfo.output_components != 3)
		459	longjmp (jerr.setjmp_buffer, 3);
		460
		461	if (cinfo.jpeg_color_space == JCS_YCCK \|\| cinfo.jpeg_color_space == JCS_CMYK)
		462	{
		463	cinfo.out_color_space = JCS_CMYK;
		464	cinfo.output_components = 4;
		465	}
		466
237	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);	467	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
238	if (!RETVAL)	468	if (!RETVAL)
239	longjmp (jerr.setjmp_buffer, 2);	469	longjmp (jerr.setjmp_buffer, 2);
240		470
241	data = gdk_pixbuf_get_pixels (RETVAL);	471	data = gdk_pixbuf_get_pixels (RETVAL);
242	rs = gdk_pixbuf_get_rowstride (RETVAL);	472	rs = gdk_pixbuf_get_rowstride (RETVAL);
243
244	if (cinfo.output_components != 3)
245	longjmp (jerr.setjmp_buffer, 3);
246		473
247	jpeg_start_decompress (&cinfo);	474	jpeg_start_decompress (&cinfo);
248		475
249	while (cinfo.output_scanline < cinfo.output_height)	476	while (cinfo.output_scanline < cinfo.output_height)
250	{	477	{
…		…
257	rp [3] = (guchar *)rp [2] + rs;	484	rp [3] = (guchar *)rp [2] + rs;
258		485
259	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);	486	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
260	}	487	}
261		488
		489	if (cinfo.out_color_space == JCS_CMYK)
		490	{
		491	guchar end = data + cinfo.output_height rs;
		492
		493	while (data < end)
		494	{
		495	U32 c = data [0];
		496	U32 m = data [1];
		497	U32 y = data [2];
		498	U32 k = data [3];
		499
		500	if (0)
		501	if (cinfo.Adobe_transform == 2)
		502	{
		503	c ^= 0xff;
		504	m ^= 0xff;
		505	y ^= 0xff;
		506	k ^= 0xff;
		507	}
		508
		509	data [0] = (c * k + 0x80) / 0xff;
		510	data [1] = (m * k + 0x80) / 0xff;
		511	data [2] = (y * k + 0x80) / 0xff;
		512	data [3] = 0xff;
		513
		514	data += 4;
		515	}
		516	}
		517
262	jpeg_finish_decompress (&cinfo);	518	jpeg_finish_decompress (&cinfo);
263	fclose (fp);	519	fclose (fp);
264	jpeg_destroy_decompress (&cinfo);	520	jpeg_destroy_decompress (&cinfo);
		521	perlinterp_acquire ();
265	}	522	}
266	OUTPUT:	523	OUTPUT:
267	RETVAL	524	RETVAL
		525
		526	void
		527	compare (GdkPixbuf a, GdkPixbuf b)
		528	PPCODE:
		529	perlinterp_release ();
		530	{
		531	int w = gdk_pixbuf_get_width (a);
		532	int h = gdk_pixbuf_get_height (a);
		533
		534	int sa = gdk_pixbuf_get_rowstride (a);
		535	int sb = gdk_pixbuf_get_rowstride (b);
		536
		537	guchar *pa = gdk_pixbuf_get_pixels (a);
		538	guchar *pb = gdk_pixbuf_get_pixels (b);
		539
		540	int x, y;
		541
		542	assert (w == gdk_pixbuf_get_width (b));
		543	assert (h == gdk_pixbuf_get_height (b));
		544
		545	assert (gdk_pixbuf_get_n_channels (a) == 3);
		546	assert (gdk_pixbuf_get_n_channels (b) == 3);
		547
		548	double diff = 0.;
		549	int peak = 0;
		550
		551	if (w && h)
		552	for (y = 0; y < h; y++)
		553	{
		554	guchar pa_ = pa + y sa;
		555	guchar pb_ = pb + y sb;
		556
		557	for (x = 0; x < w; x++)
		558	{
		559	int d;
		560
		561	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		562	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		563	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		564	}
		565	}
		566
		567	perlinterp_acquire ();
		568
		569	EXTEND (SP, 2);
		570	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		571	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		572	}
268		573
269	#############################################################################	574	#############################################################################
270		575
271	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	576	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
272		577
		578	# currently only works for filenames (octet strings)
		579
		580	SV *
		581	foldcase (SV *pathsv)
		582	PROTOTYPE: $
		583	CODE:
		584	{
		585	STRLEN plen;
		586	U8 path = (U8 )SvPV (pathsv, plen);
		587	U8 *pend = path + plen;
		588	U8 dst [plen * 6 * 3], *dstp = dst;
		589
		590	while (path < pend)
		591	{
		592	U8 ch = *path;
		593
		594	if (ch >= 'a' && ch <= 'z')
		595	dstp++ = path++;
		596	else if (ch >= 'A' && ch <= 'Z')
		597	dstp++ = path++ + ('a' - 'A');
		598	else if (ch >= '0' && ch <= '9')
		599	{
		600	STRLEN el, nl = 0;
		601	while (path >= '0' && path <= '9' && path < pend)
		602	path++, nl++;
		603
		604	for (el = nl; el < 6; el++)
		605	*dstp++ = '0';
		606
		607	memcpy (dstp, path - nl, nl);
		608	dstp += nl;
		609	}
		610	else
		611	dstp++ = path++;
		612	#if 0
		613	else
		614	{
		615	STRLEN cl;
		616	to_utf8_fold (path, dstp, &cl);
		617	dstp += cl;
		618	path += is_utf8_char (path);
		619	}
		620	#endif
		621	}
		622
		623	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		624	}
		625	OUTPUT:
		626	RETVAL
		627
273	GdkPixbuf_noinc *	628	GdkPixbuf_noinc *
274	p7_to_pb (int w, int h, guchar *src)	629	p7_to_pb (int w, int h, SV *src_sv)
		630	PROTOTYPE: @
275	CODE:	631	CODE:
276	{	632	{
277	int x, y;	633	int x, y;
278	guchar dst, d;	634	guchar dst, d;
279	int dstr;	635	int dstr;
		636	guchar src = (guchar )SvPVbyte_nolen (src_sv);
280		637
281	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	638	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
282	dst = gdk_pixbuf_get_pixels (RETVAL);	639	dst = gdk_pixbuf_get_pixels (RETVAL);
283	dstr = gdk_pixbuf_get_rowstride (RETVAL);	640	dstr = gdk_pixbuf_get_rowstride (RETVAL);
284		641
…		…
293	}	650	}
294	}	651	}
295	OUTPUT:	652	OUTPUT:
296	RETVAL	653	RETVAL
297		654
		655	#############################################################################
		656
		657	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		658
		659	void
		660	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		661	CODE:
		662	{
		663	int w = gdk_pixbuf_get_width (pb);
		664	int h = gdk_pixbuf_get_height (pb);
		665	int x, y, i;
		666	guchar *dst;
		667	int bpp = gdk_pixbuf_get_n_channels (pb);
		668	guchar *src = gdk_pixbuf_get_pixels (pb);
		669	int sstr = gdk_pixbuf_get_rowstride (pb);
		670
		671	a85_init ();
		672
		673	for (y = 0; y < h; y++)
		674	for (x = 0; x < w; x++)
		675	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		676	a85_push (fp, src [x * bpp + y * sstr + i]);
		677
		678	a85_finish (fp);
		679	}
		680
		681	void
		682	dump_binary (PerlIO fp, GdkPixbuf pb)
		683	CODE:
		684	{
		685	int w = gdk_pixbuf_get_width (pb);
		686	int h = gdk_pixbuf_get_height (pb);
		687	int x, y, i;
		688	guchar *dst;
		689	int bpp = gdk_pixbuf_get_n_channels (pb);
		690	guchar *src = gdk_pixbuf_get_pixels (pb);
		691	int sstr = gdk_pixbuf_get_rowstride (pb);
		692
		693	for (y = 0; y < h; y++)
		694	for (x = 0; x < w; x++)
		695	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		696	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		697	}
		698
		699	#############################################################################
		700
		701	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		702
298	SV *	703	SV *
299	pb_to_p7 (GdkPixbuf *pb)	704	pb_to_hv84 (GdkPixbuf *pb)
300	CODE:	705	CODE:
301	{	706	{
302	int w = gdk_pixbuf_get_width (pb);	707	int w = gdk_pixbuf_get_width (pb);
303	int h = gdk_pixbuf_get_height (pb);	708	int h = gdk_pixbuf_get_height (pb);
304	int x, y;	709	int x, y;
305	guchar *dst;	710	guchar *dst;
306	int bpp = gdk_pixbuf_get_n_channels (pb);	711	int bpp = gdk_pixbuf_get_n_channels (pb);
307	guchar *src = gdk_pixbuf_get_pixels (pb);	712	guchar *src = gdk_pixbuf_get_pixels (pb);
308	int sstr = gdk_pixbuf_get_rowstride (pb);	713	int sstr = gdk_pixbuf_get_rowstride (pb);
309	int Er[IW], Eg[IW], Eb[IW];
310	int seed = 77;
311
312	RETVAL = newSV (w * h);
313	SvPOK_only (RETVAL);
314	SvCUR_set (RETVAL, w * h);
315
316	dst = SvPVX (RETVAL);
317
318	memset (Er, 0, sizeof (int) * IW);
319	memset (Eg, 0, sizeof (int) * IW);
320	memset (Eb, 0, sizeof (int) * IW);
321
322	/* some primitive error distribution + random dithering */
323
324	for (y = 0; y < h; y++)
325	{
326	int er = 0, eg = 0, eb = 0;
327
328	for (x = 0; x < w; x++)
329	{
330	int r, g, b;
331	guchar p = src + x bpp + y * sstr;
332
333	r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
334	g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
335	b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
336
337	r = r > 7 ? 7 : r < 0 ? 0 : r;
338	g = g > 7 ? 7 : g < 0 ? 0 : g;
339	b = b > 3 ? 3 : b < 0 ? 0 : b;
340
341	er += p[0] - (r * 255 + 4) / 7;
342	eg += p[1] - (g * 255 + 4) / 7;
343	eb += p[2] - (b * 255 + 2) / 3;
344
345	Er[x] = er >> 1; er -= (er + 1) >> 1;
346	Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
347	Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
348
349	*dst++ = r << 5 \| g << 2 \| b;
350	}
351	}
352	}
353	OUTPUT:
354	RETVAL
355
356	SV *
357	make_histogram (SV *ar)
358	CODE:
359	{
360	int i;
361	AV av, result;
362
363	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
364	croak ("Not an array ref as first argument to make_histogram");
365
366	av = (AV *) SvRV (ar);
367	result = newAV ();
368
369	for (i = 0; i <= av_len (av); ++i)
370	{
371	const int HISTSIZE = 64;
372
373	int j;
374	SV sv = av_fetch (av, i, 1);
375	STRLEN len;
376	char *buf = SvPVbyte (sv, len);
377
378	int tmphist[HISTSIZE];
379	float *hist;
380
381	SV histsv = newSV (HISTSIZE sizeof (float) + 1);
382	SvPOK_on (histsv);
383	SvCUR_set (histsv, HISTSIZE * sizeof (float));
384	hist = (float *)SvPVX (histsv);
385
386	Zero (tmphist, sizeof (tmphist), char);
387
388	for (j = len; j--; )
389	{
390	unsigned int idx
391	= ((*buf & 0xc0) >> 2)
392	\| ((*buf & 0x18) >> 1)
393	\| (*buf & 0x03);
394
395	++tmphist[idx];
396	++buf;
397	}
398
399	for (j = 0; j < HISTSIZE; ++j)
400	hist[j] = (float)tmphist[j] / (len + 1e-30);
401
402	av_push (result, histsv);
403	}
404
405	RETVAL = newRV_noinc ((SV *)result);
406	}
407	OUTPUT:
408	RETVAL
409
410	#############################################################################
411
412	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
413
414	void
415	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
416	CODE:
417	{
418	int w = gdk_pixbuf_get_width (pb);
419	int h = gdk_pixbuf_get_height (pb);
420	int x, y, i;
421	guchar *dst;
422	int bpp = gdk_pixbuf_get_n_channels (pb);
423	guchar *src = gdk_pixbuf_get_pixels (pb);
424	int sstr = gdk_pixbuf_get_rowstride (pb);
425
426	a85_init ();
427
428	for (y = 0; y < h; y++)
429	for (x = 0; x < w; x++)
430	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
431	a85_push (fp, src [x * bpp + y * sstr + i]);
432
433	a85_finish (fp);
434	}
435
436	void
437	dump_binary (PerlIO fp, GdkPixbuf pb)
438	CODE:
439	{
440	int w = gdk_pixbuf_get_width (pb);
441	int h = gdk_pixbuf_get_height (pb);
442	int x, y, i;
443	guchar *dst;
444	int bpp = gdk_pixbuf_get_n_channels (pb);
445	guchar *src = gdk_pixbuf_get_pixels (pb);
446	int sstr = gdk_pixbuf_get_rowstride (pb);
447
448	for (y = 0; y < h; y++)
449	for (x = 0; x < w; x++)
450	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
451	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
452	}
453
454	#############################################################################
455
456	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
457
458	SV *
459	pb_to_hv84 (GdkPixbuf *pb)
460	CODE:
461	{
462	int w = gdk_pixbuf_get_width (pb);
463	int h = gdk_pixbuf_get_height (pb);
464	int x, y;
465	guchar *dst;
466	int bpp = gdk_pixbuf_get_n_channels (pb);
467	guchar *src = gdk_pixbuf_get_pixels (pb);
468	int sstr = gdk_pixbuf_get_rowstride (pb);
469		714
470	RETVAL = newSV (6 * 8 * 12 / 8);	715	RETVAL = newSV (6 * 8 * 12 / 8);
471	SvPOK_only (RETVAL);	716	SvPOK_only (RETVAL);
472	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	717	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
473		718
474	dst = SvPVX (RETVAL);	719	dst = (guchar *)SvPVX (RETVAL);
475		720
476	/* some primitive error distribution + random dithering */	721	/* some primitive error distribution + random dithering */
477		722
478	for (y = 0; y < h; y++)	723	for (y = 0; y < h; y++)
479	{	724	{
…		…
537	}	782	}
538	}	783	}
539	OUTPUT:	784	OUTPUT:
540	RETVAL	785	RETVAL
541		786
		787	#############################################################################
542		788
		789	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
543		790
		791	SV *
		792	extract_features (SV *ar)
		793	CODE:
		794	{
		795	int i;
		796	AV av, result;
		797
		798	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		799	croak ("Not an array ref as first argument to extract_features");
		800
		801	av = (AV *) SvRV (ar);
		802	result = newAV ();
		803
		804	for (i = 0; i <= av_len (av); ++i)
		805	{
		806	SV sv = av_fetch (av, i, 1);
		807	SV histsv = newSV (9 sizeof (float) + 1);
		808
		809	SvPOK_on (histsv);
		810	SvCUR_set (histsv, 9 * sizeof (float));
		811	float hist = (float )SvPVX (histsv);
		812
		813	struct feature f_h, f_s, f_v;
		814	feature_init (&f_h);
		815	feature_init (&f_s);
		816	feature_init (&f_v);
		817
		818	{
		819	STRLEN len;
		820	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		821	while (len >= 3)
		822	{
		823	unsigned int r, g, b, h, s, v;
		824	r = buf++; g = buf++; b = *buf++;
		825	rgb_to_hsv (r, g, b, &h, &s, &v);
		826
		827	feature_update_pass_1 (&f_h, h);
		828	feature_update_pass_1 (&f_s, s);
		829	feature_update_pass_1 (&f_v, v);
		830
		831	len -= 3;
		832	}
		833
		834	feature_finish_pass_1 (&f_h);
		835	feature_finish_pass_1 (&f_s);
		836	feature_finish_pass_1 (&f_v);
		837	}
		838
		839	{
		840	STRLEN len;
		841	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		842	while (len >= 3)
		843	{
		844	unsigned int r, g, b, h, s, v;
		845	r = buf++; g = buf++; b = *buf++;
		846	rgb_to_hsv (r, g, b, &h, &s, &v);
		847
		848	feature_update_pass_2 (&f_h, h);
		849	feature_update_pass_2 (&f_s, s);
		850	feature_update_pass_2 (&f_v, v);
		851
		852	len -= 3;
		853	}
		854
		855	feature_finish_pass_2 (&f_h);
		856	feature_finish_pass_2 (&f_s);
		857	feature_finish_pass_2 (&f_v);
		858	}
		859
		860	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		861	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		862	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
		863
		864	av_push (result, histsv);
		865	}
		866
		867	RETVAL = newRV_noinc ((SV *)result);
		868	}
		869	OUTPUT:
		870	RETVAL
		871

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Comparing CV/CV.xs (file contents): Revision 1.17 by root, Wed Jul 20 06:20:36 2005 UTC vs. Revision 1.50 by root, Sat Dec 23 03:30:28 2017 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.17 by root, Wed Jul 20 06:20:36 2005 UTC vs.
Revision 1.50 by root, Sat Dec 23 03:30:28 2017 UTC