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

Comparing CV/CV.xs (file contents):
Revision 1.19 by root, Wed Jul 20 22:33:01 2005 UTC vs.
Revision 1.48 by root, Wed May 24 05:00:57 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 <glib.h>
		13	#include <gtk/gtk.h>
9	#include <gdk-pixbuf/gdk-pixbuf.h>	14	#include <gdk-pixbuf/gdk-pixbuf.h>
10		15
11	#include <gperl.h>	16	#include <gperl.h>
12	#include <gtk2perl.h>	17	#include <gtk2perl.h>
13		18
		19	#include <assert.h>
		20
		21	#include "perlmulticore.h"
		22
14	#define IW 80 /* MUST match Schnauer.pm! */	23	#define IW 80 /* MUST match Schnauzer.pm! */
15	#define IH 60 /* MUST match Schnauer.pm! */	24	#define IH 60 /* MUST match Schnauzer.pm! */
16		25
17	#define RAND (seed = (seed + 7141) * 54773 % 134456)	26	#define RAND (seed = (seed + 7141) * 54773 % 134456)
18		27
19	#define LINELENGTH 240	28	#define LINELENGTH 240
20		29
21	#define ELLIPSIS "\xe2\x80\xa6"	30	#define ELLIPSIS "\xe2\x80\xa6"
		31
		32	typedef char *octet_string;
22		33
23	struct jpg_err_mgr	34	struct jpg_err_mgr
24	{	35	{
25	struct jpeg_error_mgr err;	36	struct jpeg_error_mgr err;
26	jmp_buf setjmp_buffer;	37	jmp_buf setjmp_buffer;
27	};	38	};
28		39
29	static void	40	static void
30	cv_error_exit (j_common_ptr cinfo)	41	cv_error_exit (j_common_ptr cinfo)
31	{	42	{
		43	cinfo->err->output_message (cinfo);
32	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);	44	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
33	}	45	}
34		46
35	static void	47	static void
36	cv_error_output (j_common_ptr cinfo)	48	cv_error_output (j_common_ptr cinfo)
37	{	49	{
		50	char msg[JMSG_LENGTH_MAX];
		51
		52	cinfo->err->format_message (cinfo, msg);
		53
		54	fprintf (stderr, "JPEG decoding error: %s\n", msg);
38	return;	55	return;
39	}	56	}
40		57
41	static void	58	static void
42	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,	59	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
…		…
63		80
64	*h &= 255;	81	*h &= 255;
65	}	82	}
66	}	83	}
67		84
		85	struct feature {
		86	float v1, v2, v3; // mean, square, cube
		87	int n;
		88	};
		89
		90	static void
		91	feature_init (struct feature *f)
		92	{
		93	f->v1 = 0.;
		94	f->v2 = 0.;
		95	f->v3 = 0.;
		96	f->n = 0;
		97	}
		98
		99	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		100	// elmex ist schuld.
		101	static void
		102	feature_update_pass_1 (struct feature *f, unsigned int v)
		103	{
		104	f->v1 += v;
		105	f->n += 1;
		106	}
		107
		108	static void
		109	feature_finish_pass_1 (struct feature *f)
		110	{
		111	if (f->n < 1)
		112	return;
		113
		114	f->v1 /= f->n;
		115	}
		116
		117	static void
		118	feature_update_pass_2 (struct feature *f, unsigned int v)
		119	{
		120	float d = v - f->v1;
		121
		122	f->v2 += d * d;
		123	f->v3 += d * d * d;
		124	}
		125
		126	static void
		127	feature_finish_pass_2 (struct feature *f)
		128	{
		129	if (f->n < 1)
		130	return;
		131
		132	f->v2 /= f->n;
		133	f->v3 /= f->n;
		134
		135	f->v1 /= 255.;
		136	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		137	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		138	}
		139
68	static guint32 a85_val;	140	static guint32 a85_val;
69	static guint a85_cnt;	141	static guint a85_cnt;
70	static guchar a85_buf[LINELENGTH], *a85_ptr;	142	static guchar a85_buf[LINELENGTH], *a85_ptr;
71		143
72	static void	144	static void
…		…
124		196
125	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	197	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
126		198
127	PROTOTYPES: ENABLE	199	PROTOTYPES: ENABLE
128		200
		201	# missing function in perl. really :)
		202	int
		203	common_prefix_length (a, b)
		204	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		205	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		206	CODE:
		207	RETVAL = 0;
		208
		209	while (a == b && *a)
		210	{
		211	RETVAL += (*a & 0xc0) != 0x80;
		212	a++, b++;
		213	}
		214
		215	OUTPUT:
		216	RETVAL
		217
		218	const char *
		219	magic (octet_string path)
		220	CODE:
		221	{
		222	static magic_t cookie;
		223
		224	if (!cookie)
		225	{
		226	cookie = magic_open (MAGIC_SYMLINK);
		227
		228	if (cookie)
		229	magic_load (cookie, 0);
		230	else
		231	XSRETURN_UNDEF;
		232	}
		233
		234	RETVAL = magic_file (cookie, path);
		235	}
		236	OUTPUT:
		237	RETVAL
		238
		239	const char *
		240	magic_mime (octet_string path)
		241	CODE:
		242	{
		243	static magic_t cookie;
		244
		245	if (!cookie)
		246	{
		247	cookie = magic_open (MAGIC_MIME \| MAGIC_SYMLINK);
		248
		249	if (cookie)
		250	magic_load (cookie, 0);
		251	else
		252	XSRETURN_UNDEF;
		253	}
		254
		255	perlinterp_release ();
		256	RETVAL = magic_file (cookie, path);
		257	perlinterp_acquire ();
		258	}
		259	OUTPUT:
		260	RETVAL
		261
		262	# missing/broken in Gtk2 perl module
		263
		264	void
		265	gdk_window_clear_hints (GdkWindow *window)
		266	CODE:
		267	gdk_window_set_geometry_hints (window, 0, 0);
		268
		269	gboolean
		270	gdk_net_wm_supports (GdkAtom property)
		271	CODE:
		272	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		273	RETVAL = gdk_net_wm_supports (property);
		274	#else
		275	RETVAL = 0;
		276	#endif
		277	OUTPUT:
		278	RETVAL
		279
129	GdkPixbuf_noinc *	280	GdkPixbuf_noinc *
130	transpose (GdkPixbuf *pb)	281	dealpha_expose (GdkPixbuf *pb)
131	CODE:	282	CODE:
		283	perlinterp_release ();
132	{	284	{
133	int w = gdk_pixbuf_get_width (pb);	285	int w = gdk_pixbuf_get_width (pb);
134	int h = gdk_pixbuf_get_height (pb);	286	int h = gdk_pixbuf_get_height (pb);
135	int bpp = gdk_pixbuf_get_n_channels (pb);	287	int bpp = gdk_pixbuf_get_n_channels (pb);
136	int x, y, i;	288	int x, y, i;
137	guchar src = gdk_pixbuf_get_pixels (pb), dst;	289	guchar src = gdk_pixbuf_get_pixels (pb), dst;
138	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	290	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
139		291
140	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	292	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
141		293
142	dst = gdk_pixbuf_get_pixels (RETVAL);	294	dst = gdk_pixbuf_get_pixels (RETVAL);
143	dstr = gdk_pixbuf_get_rowstride (RETVAL);	295	dstr = gdk_pixbuf_get_rowstride (RETVAL);
144		296
145	for (y = 0; y < h; y++)
146	for (x = 0; x < w; x++)	297	for (x = 0; x < w; x++)
		298	for (y = 0; y < h; y++)
147	for (i = 0; i < bpp; i++)	299	for (i = 0; i < 3; i++)
148	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	300	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
149	}	301	}
		302	perlinterp_acquire ();
150	OUTPUT:	303	OUTPUT:
151	RETVAL	304	RETVAL
152		305
153	GdkPixbuf_noinc *	306	GdkPixbuf_noinc *
154	flop (GdkPixbuf *pb)	307	rotate (GdkPixbuf *pb, int angle)
155	CODE:	308	CODE:
156	{	309	perlinterp_release ();
157	int w = gdk_pixbuf_get_width (pb);	310	if (angle < 0)
158	int h = gdk_pixbuf_get_height (pb);	311	angle += 360;
159	int bpp = gdk_pixbuf_get_n_channels (pb);	312	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
160	int x, y, i;	313	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
161	guchar src = gdk_pixbuf_get_pixels (pb), dst;	314	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
162	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	315	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
163		316	: angle);
164	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	317	perlinterp_acquire ();
165
166	dst = gdk_pixbuf_get_pixels (RETVAL);
167	dstr = gdk_pixbuf_get_rowstride (RETVAL);
168
169	for (y = 0; y < h; y++)
170	for (x = 0; x < w; x++)
171	for (i = 0; i < bpp; i++)
172	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
173	}
174	OUTPUT:	318	OUTPUT:
175	RETVAL	319	RETVAL
176		320
177	GdkPixbuf_noinc *	321	GdkPixbuf_noinc *
178	load_jpeg (char *path, int thumbnail=0)	322	load_jpeg (SV *path, int thumbnail = 0, int iw = 0, int ih = 0)
179	CODE:	323	CODE:
180	{	324	{
181	struct jpeg_decompress_struct cinfo;	325	struct jpeg_decompress_struct cinfo;
182	struct jpg_err_mgr jerr;	326	struct jpg_err_mgr jerr;
183	guchar *data;	327	guchar *data;
184	int rs;	328	int rs;
185	FILE *fp;	329	FILE *fp;
186	volatile GdkPixbuf *pb = 0;	330	volatile GdkPixbuf *pb = 0;
		331
187	RETVAL = 0;	332	RETVAL = 0;
188		333
189	if (!(fp = fopen (path, "rb")))	334	fp = fopen (SvPVbyte_nolen (path), "rb");
		335
		336	if (!fp)
190	XSRETURN_UNDEF;	337	XSRETURN_UNDEF;
		338
		339	perlinterp_release ();
191		340
192	cinfo.err = jpeg_std_error (&jerr.err);	341	cinfo.err = jpeg_std_error (&jerr.err);
193		342
194	jerr.err.error_exit = cv_error_exit;	343	jerr.err.error_exit = cv_error_exit;
195	jerr.err.output_message = cv_error_output;	344	jerr.err.output_message = cv_error_output;
…		…
200	jpeg_destroy_decompress (&cinfo);	349	jpeg_destroy_decompress (&cinfo);
201		350
202	if (pb)	351	if (pb)
203	g_object_unref ((gpointer)pb);	352	g_object_unref ((gpointer)pb);
204		353
		354	perlinterp_acquire ();
205	XSRETURN_UNDEF;	355	XSRETURN_UNDEF;
206	}	356	}
207		357
208	jpeg_create_decompress (&cinfo);	358	jpeg_create_decompress (&cinfo);
209		359
…		…
225	{	375	{
226	cinfo.dct_method = JDCT_FASTEST;	376	cinfo.dct_method = JDCT_FASTEST;
227	cinfo.do_fancy_upsampling = FALSE;	377	cinfo.do_fancy_upsampling = FALSE;
228		378
229	while (cinfo.scale_denom < 8	379	while (cinfo.scale_denom < 8
230	&& (cinfo.output_width >> 1) >= IW	380	&& cinfo.output_width >= iw*4
231	&& (cinfo.output_height >> 1) >= IH)	381	&& cinfo.output_height >= ih*4)
232	{	382	{
233	cinfo.scale_denom <<= 1;	383	cinfo.scale_denom <<= 1;
234	jpeg_calc_output_dimensions (&cinfo);	384	jpeg_calc_output_dimensions (&cinfo);
235	}	385	}
236	}	386	}
237		387
		388	if (cinfo.output_components != 3)
		389	longjmp (jerr.setjmp_buffer, 3);
		390
		391	if (cinfo.jpeg_color_space == JCS_YCCK \|\| cinfo.jpeg_color_space == JCS_CMYK)
		392	{
		393	cinfo.out_color_space = JCS_CMYK;
		394	cinfo.output_components = 4;
		395	}
		396
238	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);	397	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
239	if (!RETVAL)	398	if (!RETVAL)
240	longjmp (jerr.setjmp_buffer, 2);	399	longjmp (jerr.setjmp_buffer, 2);
241		400
242	data = gdk_pixbuf_get_pixels (RETVAL);	401	data = gdk_pixbuf_get_pixels (RETVAL);
243	rs = gdk_pixbuf_get_rowstride (RETVAL);	402	rs = gdk_pixbuf_get_rowstride (RETVAL);
244
245	if (cinfo.output_components != 3)
246	longjmp (jerr.setjmp_buffer, 3);
247		403
248	jpeg_start_decompress (&cinfo);	404	jpeg_start_decompress (&cinfo);
249		405
250	while (cinfo.output_scanline < cinfo.output_height)	406	while (cinfo.output_scanline < cinfo.output_height)
251	{	407	{
…		…
258	rp [3] = (guchar *)rp [2] + rs;	414	rp [3] = (guchar *)rp [2] + rs;
259		415
260	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);	416	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
261	}	417	}
262		418
		419	if (cinfo.out_color_space == JCS_CMYK)
		420	{
		421	guchar end = data + cinfo.output_height rs;
		422
		423	while (data < end)
		424	{
		425	U32 c = data [0];
		426	U32 m = data [1];
		427	U32 y = data [2];
		428	U32 k = data [3];
		429
		430	data [0] = c * k / 255;
		431	data [1] = m * k / 255;
		432	data [2] = y * k / 255;
		433	data [3] = 255;
		434
		435	data += 4;
		436	}
		437	}
		438
263	jpeg_finish_decompress (&cinfo);	439	jpeg_finish_decompress (&cinfo);
264	fclose (fp);	440	fclose (fp);
265	jpeg_destroy_decompress (&cinfo);	441	jpeg_destroy_decompress (&cinfo);
		442	perlinterp_acquire ();
266	}	443	}
267	OUTPUT:	444	OUTPUT:
268	RETVAL	445	RETVAL
		446
		447	void
		448	compare (GdkPixbuf a, GdkPixbuf b)
		449	PPCODE:
		450	perlinterp_release ();
		451	{
		452	int w = gdk_pixbuf_get_width (a);
		453	int h = gdk_pixbuf_get_height (a);
		454
		455	int sa = gdk_pixbuf_get_rowstride (a);
		456	int sb = gdk_pixbuf_get_rowstride (b);
		457
		458	guchar *pa = gdk_pixbuf_get_pixels (a);
		459	guchar *pb = gdk_pixbuf_get_pixels (b);
		460
		461	int x, y;
		462
		463	assert (w == gdk_pixbuf_get_width (b));
		464	assert (h == gdk_pixbuf_get_height (b));
		465
		466	assert (gdk_pixbuf_get_n_channels (a) == 3);
		467	assert (gdk_pixbuf_get_n_channels (b) == 3);
		468
		469	double diff = 0.;
		470	int peak = 0;
		471
		472	if (w && h)
		473	for (y = 0; y < h; y++)
		474	{
		475	guchar pa_ = pa + y sa;
		476	guchar pb_ = pb + y sb;
		477
		478	for (x = 0; x < w; x++)
		479	{
		480	int d;
		481
		482	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		483	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		484	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		485	}
		486	}
		487
		488	perlinterp_acquire ();
		489
		490	EXTEND (SP, 2);
		491	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		492	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		493	}
269		494
270	#############################################################################	495	#############################################################################
271		496
272	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	497	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
		498
		499	# currently only works for filenames (octet strings)
273		500
274	SV *	501	SV *
275	foldcase (SV *pathsv)	502	foldcase (SV *pathsv)
276	PROTOTYPE: $	503	PROTOTYPE: $
277	CODE:	504	CODE:
278	{	505	{
279	STRLEN plen;	506	STRLEN plen;
280	U8 *path = SvPVutf8 (pathsv, plen);	507	U8 path = (U8 )SvPV (pathsv, plen);
281	U8 *pend = path + plen;	508	U8 *pend = path + plen;
282	U8 dst [plen * 6 * 3], *dstp = dst;	509	U8 dst [plen * 6 * 3], *dstp = dst;
283		510
284	while (path < pend)	511	while (path < pend)
285	{	512	{
286	U8 ch = *path;	513	U8 ch = *path;
287		514
288	if (ch >= 'a' && ch <= 'z')	515	if (ch >= 'a' && ch <= 'z')
289	dstp++ = path++;	516	dstp++ = path++;
		517	else if (ch >= 'A' && ch <= 'Z')
		518	dstp++ = path++ + ('a' - 'A');
290	else if (ch >= '0' && ch <= '9')	519	else if (ch >= '0' && ch <= '9')
291	{	520	{
292	STRLEN el, nl = 0;	521	STRLEN el, nl = 0;
293	while (path >= '0' && path <= '9' && path < pend)	522	while (path >= '0' && path <= '9' && path < pend)
294	path++, nl++;	523	path++, nl++;
…		…
297	*dstp++ = '0';	526	*dstp++ = '0';
298		527
299	memcpy (dstp, path - nl, nl);	528	memcpy (dstp, path - nl, nl);
300	dstp += nl;	529	dstp += nl;
301	}	530	}
		531	else
		532	dstp++ = path++;
		533	#if 0
302	else	534	else
303	{	535	{
304	STRLEN cl;	536	STRLEN cl;
305	to_utf8_fold (path, dstp, &cl);	537	to_utf8_fold (path, dstp, &cl);
306	dstp += cl;	538	dstp += cl;
307	path += is_utf8_char (path);	539	path += is_utf8_char (path);
308	}	540	}
		541	#endif
309	}	542	}
310		543
311	RETVAL = newSVpvn (dst, dstp - dst);	544	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
312	}	545	}
313	OUTPUT:	546	OUTPUT:
314	RETVAL	547	RETVAL
315		548
316	GdkPixbuf_noinc *	549	GdkPixbuf_noinc *
317	p7_to_pb (int w, int h, guchar *src)	550	p7_to_pb (int w, int h, SV *src_sv)
		551	PROTOTYPE: @
318	CODE:	552	CODE:
319	{	553	{
320	int x, y;	554	int x, y;
321	guchar dst, d;	555	guchar dst, d;
322	int dstr;	556	int dstr;
		557	guchar src = (guchar )SvPVbyte_nolen (src_sv);
323		558
324	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	559	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
325	dst = gdk_pixbuf_get_pixels (RETVAL);	560	dst = gdk_pixbuf_get_pixels (RETVAL);
326	dstr = gdk_pixbuf_get_rowstride (RETVAL);	561	dstr = gdk_pixbuf_get_rowstride (RETVAL);
327		562
…		…
336	}	571	}
337	}	572	}
338	OUTPUT:	573	OUTPUT:
339	RETVAL	574	RETVAL
340		575
		576	#############################################################################
		577
		578	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		579
		580	void
		581	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		582	CODE:
		583	{
		584	int w = gdk_pixbuf_get_width (pb);
		585	int h = gdk_pixbuf_get_height (pb);
		586	int x, y, i;
		587	guchar *dst;
		588	int bpp = gdk_pixbuf_get_n_channels (pb);
		589	guchar *src = gdk_pixbuf_get_pixels (pb);
		590	int sstr = gdk_pixbuf_get_rowstride (pb);
		591
		592	a85_init ();
		593
		594	for (y = 0; y < h; y++)
		595	for (x = 0; x < w; x++)
		596	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		597	a85_push (fp, src [x * bpp + y * sstr + i]);
		598
		599	a85_finish (fp);
		600	}
		601
		602	void
		603	dump_binary (PerlIO fp, GdkPixbuf pb)
		604	CODE:
		605	{
		606	int w = gdk_pixbuf_get_width (pb);
		607	int h = gdk_pixbuf_get_height (pb);
		608	int x, y, i;
		609	guchar *dst;
		610	int bpp = gdk_pixbuf_get_n_channels (pb);
		611	guchar *src = gdk_pixbuf_get_pixels (pb);
		612	int sstr = gdk_pixbuf_get_rowstride (pb);
		613
		614	for (y = 0; y < h; y++)
		615	for (x = 0; x < w; x++)
		616	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		617	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		618	}
		619
		620	#############################################################################
		621
		622	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		623
341	SV *	624	SV *
342	pb_to_p7 (GdkPixbuf *pb)	625	pb_to_hv84 (GdkPixbuf *pb)
343	CODE:	626	CODE:
344	{	627	{
345	int w = gdk_pixbuf_get_width (pb);	628	int w = gdk_pixbuf_get_width (pb);
346	int h = gdk_pixbuf_get_height (pb);	629	int h = gdk_pixbuf_get_height (pb);
347	int x, y;	630	int x, y;
348	guchar *dst;	631	guchar *dst;
349	int bpp = gdk_pixbuf_get_n_channels (pb);	632	int bpp = gdk_pixbuf_get_n_channels (pb);
350	guchar *src = gdk_pixbuf_get_pixels (pb);	633	guchar *src = gdk_pixbuf_get_pixels (pb);
351	int sstr = gdk_pixbuf_get_rowstride (pb);	634	int sstr = gdk_pixbuf_get_rowstride (pb);
352	int Er[IW], Eg[IW], Eb[IW];
353	int seed = 77;
354
355	RETVAL = newSV (w * h);
356	SvPOK_only (RETVAL);
357	SvCUR_set (RETVAL, w * h);
358
359	dst = SvPVX (RETVAL);
360
361	memset (Er, 0, sizeof (int) * IW);
362	memset (Eg, 0, sizeof (int) * IW);
363	memset (Eb, 0, sizeof (int) * IW);
364
365	/* some primitive error distribution + random dithering */
366
367	for (y = 0; y < h; y++)
368	{
369	int er = 0, eg = 0, eb = 0;
370
371	for (x = 0; x < w; x++)
372	{
373	int r, g, b;
374	guchar p = src + x bpp + y * sstr;
375
376	r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
377	g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
378	b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
379
380	r = r > 7 ? 7 : r < 0 ? 0 : r;
381	g = g > 7 ? 7 : g < 0 ? 0 : g;
382	b = b > 3 ? 3 : b < 0 ? 0 : b;
383
384	er += p[0] - (r * 255 + 4) / 7;
385	eg += p[1] - (g * 255 + 4) / 7;
386	eb += p[2] - (b * 255 + 2) / 3;
387
388	Er[x] = er >> 1; er -= (er + 1) >> 1;
389	Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
390	Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
391
392	*dst++ = r << 5 \| g << 2 \| b;
393	}
394	}
395	}
396	OUTPUT:
397	RETVAL
398
399	SV *
400	make_histogram (SV *ar)
401	CODE:
402	{
403	int i;
404	AV av, result;
405
406	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
407	croak ("Not an array ref as first argument to make_histogram");
408
409	av = (AV *) SvRV (ar);
410	result = newAV ();
411
412	for (i = 0; i <= av_len (av); ++i)
413	{
414	const int HISTSIZE = 64;
415
416	int j;
417	SV sv = av_fetch (av, i, 1);
418	STRLEN len;
419	char *buf = SvPVbyte (sv, len);
420
421	int tmphist[HISTSIZE];
422	float *hist;
423
424	SV histsv = newSV (HISTSIZE sizeof (float) + 1);
425	SvPOK_on (histsv);
426	SvCUR_set (histsv, HISTSIZE * sizeof (float));
427	hist = (float *)SvPVX (histsv);
428
429	Zero (tmphist, sizeof (tmphist), char);
430
431	for (j = len; j--; )
432	{
433	unsigned int idx
434	= ((*buf & 0xc0) >> 2)
435	\| ((*buf & 0x18) >> 1)
436	\| (*buf & 0x03);
437
438	++tmphist[idx];
439	++buf;
440	}
441
442	for (j = 0; j < HISTSIZE; ++j)
443	hist[j] = (float)tmphist[j] / (len + 1e-30);
444
445	av_push (result, histsv);
446	}
447
448	RETVAL = newRV_noinc ((SV *)result);
449	}
450	OUTPUT:
451	RETVAL
452
453	#############################################################################
454
455	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
456
457	void
458	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
459	CODE:
460	{
461	int w = gdk_pixbuf_get_width (pb);
462	int h = gdk_pixbuf_get_height (pb);
463	int x, y, i;
464	guchar *dst;
465	int bpp = gdk_pixbuf_get_n_channels (pb);
466	guchar *src = gdk_pixbuf_get_pixels (pb);
467	int sstr = gdk_pixbuf_get_rowstride (pb);
468
469	a85_init ();
470
471	for (y = 0; y < h; y++)
472	for (x = 0; x < w; x++)
473	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
474	a85_push (fp, src [x * bpp + y * sstr + i]);
475
476	a85_finish (fp);
477	}
478
479	void
480	dump_binary (PerlIO fp, GdkPixbuf pb)
481	CODE:
482	{
483	int w = gdk_pixbuf_get_width (pb);
484	int h = gdk_pixbuf_get_height (pb);
485	int x, y, i;
486	guchar *dst;
487	int bpp = gdk_pixbuf_get_n_channels (pb);
488	guchar *src = gdk_pixbuf_get_pixels (pb);
489	int sstr = gdk_pixbuf_get_rowstride (pb);
490
491	for (y = 0; y < h; y++)
492	for (x = 0; x < w; x++)
493	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
494	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
495	}
496
497	#############################################################################
498
499	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
500
501	SV *
502	pb_to_hv84 (GdkPixbuf *pb)
503	CODE:
504	{
505	int w = gdk_pixbuf_get_width (pb);
506	int h = gdk_pixbuf_get_height (pb);
507	int x, y;
508	guchar *dst;
509	int bpp = gdk_pixbuf_get_n_channels (pb);
510	guchar *src = gdk_pixbuf_get_pixels (pb);
511	int sstr = gdk_pixbuf_get_rowstride (pb);
512		635
513	RETVAL = newSV (6 * 8 * 12 / 8);	636	RETVAL = newSV (6 * 8 * 12 / 8);
514	SvPOK_only (RETVAL);	637	SvPOK_only (RETVAL);
515	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	638	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
516		639
517	dst = SvPVX (RETVAL);	640	dst = (guchar *)SvPVX (RETVAL);
518		641
519	/* some primitive error distribution + random dithering */	642	/* some primitive error distribution + random dithering */
520		643
521	for (y = 0; y < h; y++)	644	for (y = 0; y < h; y++)
522	{	645	{
…		…
580	}	703	}
581	}	704	}
582	OUTPUT:	705	OUTPUT:
583	RETVAL	706	RETVAL
584		707
		708	#############################################################################
585		709
		710	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
586		711
		712	SV *
		713	extract_features (SV *ar)
		714	CODE:
		715	{
		716	int i;
		717	AV av, result;
		718
		719	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		720	croak ("Not an array ref as first argument to extract_features");
		721
		722	av = (AV *) SvRV (ar);
		723	result = newAV ();
		724
		725	for (i = 0; i <= av_len (av); ++i)
		726	{
		727	SV sv = av_fetch (av, i, 1);
		728	SV histsv = newSV (9 sizeof (float) + 1);
		729
		730	SvPOK_on (histsv);
		731	SvCUR_set (histsv, 9 * sizeof (float));
		732	float hist = (float )SvPVX (histsv);
		733
		734	struct feature f_h, f_s, f_v;
		735	feature_init (&f_h);
		736	feature_init (&f_s);
		737	feature_init (&f_v);
		738
		739	{
		740	STRLEN len;
		741	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		742	while (len >= 3)
		743	{
		744	unsigned int r, g, b, h, s, v;
		745	r = buf++; g = buf++; b = *buf++;
		746	rgb_to_hsv (r, g, b, &h, &s, &v);
		747
		748	feature_update_pass_1 (&f_h, h);
		749	feature_update_pass_1 (&f_s, s);
		750	feature_update_pass_1 (&f_v, v);
		751
		752	len -= 3;
		753	}
		754
		755	feature_finish_pass_1 (&f_h);
		756	feature_finish_pass_1 (&f_s);
		757	feature_finish_pass_1 (&f_v);
		758	}
		759
		760	{
		761	STRLEN len;
		762	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		763	while (len >= 3)
		764	{
		765	unsigned int r, g, b, h, s, v;
		766	r = buf++; g = buf++; b = *buf++;
		767	rgb_to_hsv (r, g, b, &h, &s, &v);
		768
		769	feature_update_pass_2 (&f_h, h);
		770	feature_update_pass_2 (&f_s, s);
		771	feature_update_pass_2 (&f_v, v);
		772
		773	len -= 3;
		774	}
		775
		776	feature_finish_pass_2 (&f_h);
		777	feature_finish_pass_2 (&f_s);
		778	feature_finish_pass_2 (&f_v);
		779	}
		780
		781	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		782	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		783	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
		784
		785	av_push (result, histsv);
		786	}
		787
		788	RETVAL = newRV_noinc ((SV *)result);
		789	}
		790	OUTPUT:
		791	RETVAL
		792

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Comparing CV/CV.xs (file contents): Revision 1.19 by root, Wed Jul 20 22:33:01 2005 UTC vs. Revision 1.48 by root, Wed May 24 05:00:57 2017 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.19 by root, Wed Jul 20 22:33:01 2005 UTC vs.
Revision 1.48 by root, Wed May 24 05:00:57 2017 UTC