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

Comparing CV/CV.xs (file contents):
Revision 1.11 by root, Tue Feb 8 10:43:44 2005 UTC vs.
Revision 1.48 by root, Wed May 24 05:00:57 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>
		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	#include "perlmulticore.h"
		22
		23	#define IW 80 /* MUST match Schnauzer.pm! */
		24	#define IH 60 /* MUST match Schnauzer.pm! */
11		25
12	#define RAND (seed = (seed + 7141) * 54773 % 134456)	26	#define RAND (seed = (seed + 7141) * 54773 % 134456)
13		27
14	#define LINELENGTH 240	28	#define LINELENGTH 240
15		29
16	#define ELLIPSIS "\xe2\x80\xa6"	30	#define ELLIPSIS "\xe2\x80\xa6"
		31
		32	typedef char *octet_string;
		33
		34	struct jpg_err_mgr
		35	{
		36	struct jpeg_error_mgr err;
		37	jmp_buf setjmp_buffer;
		38	};
		39
		40	static void
		41	cv_error_exit (j_common_ptr cinfo)
		42	{
		43	cinfo->err->output_message (cinfo);
		44	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
		45	}
		46
		47	static void
		48	cv_error_output (j_common_ptr cinfo)
		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);
		55	return;
		56	}
		57
		58	static void
		59	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
		60	unsigned int h, unsigned int s, unsigned int *v)
		61	{
		62	unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
		63	unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
		64	unsigned int delta = mx - mn;
		65
		66	*v = mx;
		67
		68	s = mx ? delta 255 / mx : 0;
		69
		70	if (delta == 0)
		71	*h = 0;
		72	else
		73	{
		74	if (r == mx)
		75	h = ((int)g - (int)b) 255 / (int)(delta * 3);
		76	else if (g == mx)
		77	h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
		78	else if (b == mx)
		79	h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
		80
		81	*h &= 255;
		82	}
		83	}
		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	}
17		139
18	static guint32 a85_val;	140	static guint32 a85_val;
19	static guint a85_cnt;	141	static guint a85_cnt;
20	static guchar a85_buf[LINELENGTH], *a85_ptr;	142	static guchar a85_buf[LINELENGTH], *a85_ptr;
21		143
68	*a85_ptr++ = '\n';	190	*a85_ptr++ = '\n';
69		191
70	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	192	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
71	}	193	}
72		194
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	/////////////////////////////////////////////////////////////////////////////	195	/////////////////////////////////////////////////////////////////////////////
101		196
102	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	197	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
103		198
104	PROTOTYPES: ENABLE	199	PROTOTYPES: ENABLE
105		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
106	GdkPixbuf_noinc *	280	GdkPixbuf_noinc *
107	transpose (GdkPixbuf *pb)	281	dealpha_expose (GdkPixbuf *pb)
108	CODE:	282	CODE:
		283	perlinterp_release ();
109	{	284	{
110	int w = gdk_pixbuf_get_width (pb);	285	int w = gdk_pixbuf_get_width (pb);
111	int h = gdk_pixbuf_get_height (pb);	286	int h = gdk_pixbuf_get_height (pb);
112	int bpp = gdk_pixbuf_get_n_channels (pb);	287	int bpp = gdk_pixbuf_get_n_channels (pb);
113	int x, y, i;	288	int x, y, i;
114	guchar src = gdk_pixbuf_get_pixels (pb), dst;	289	guchar src = gdk_pixbuf_get_pixels (pb), dst;
115	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	290	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
116		291
117	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	292	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
118		293
119	dst = gdk_pixbuf_get_pixels (RETVAL);	294	dst = gdk_pixbuf_get_pixels (RETVAL);
120	dstr = gdk_pixbuf_get_rowstride (RETVAL);	295	dstr = gdk_pixbuf_get_rowstride (RETVAL);
121		296
122	for (y = 0; y < h; y++)
123	for (x = 0; x < w; x++)	297	for (x = 0; x < w; x++)
		298	for (y = 0; y < h; y++)
124	for (i = 0; i < bpp; i++)	299	for (i = 0; i < 3; i++)
125	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];
126	}	301	}
		302	perlinterp_acquire ();
127	OUTPUT:	303	OUTPUT:
128	RETVAL	304	RETVAL
129		305
130	GdkPixbuf_noinc *	306	GdkPixbuf_noinc *
131	flop (GdkPixbuf *pb)	307	rotate (GdkPixbuf *pb, int angle)
132	CODE:	308	CODE:
133	{	309	perlinterp_release ();
134	int w = gdk_pixbuf_get_width (pb);	310	if (angle < 0)
135	int h = gdk_pixbuf_get_height (pb);	311	angle += 360;
136	int bpp = gdk_pixbuf_get_n_channels (pb);	312	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
137	int x, y, i;	313	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
138	guchar src = gdk_pixbuf_get_pixels (pb), dst;	314	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
139	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	315	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
		316	: angle);
		317	perlinterp_acquire ();
		318	OUTPUT:
		319	RETVAL
140		320
141	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	321	GdkPixbuf_noinc *
		322	load_jpeg (SV *path, int thumbnail = 0, int iw = 0, int ih = 0)
		323	CODE:
		324	{
		325	struct jpeg_decompress_struct cinfo;
		326	struct jpg_err_mgr jerr;
		327	guchar *data;
		328	int rs;
		329	FILE *fp;
		330	volatile GdkPixbuf *pb = 0;
142		331
		332	RETVAL = 0;
		333
		334	fp = fopen (SvPVbyte_nolen (path), "rb");
		335
		336	if (!fp)
		337	XSRETURN_UNDEF;
		338
		339	perlinterp_release ();
		340
		341	cinfo.err = jpeg_std_error (&jerr.err);
		342
		343	jerr.err.error_exit = cv_error_exit;
		344	jerr.err.output_message = cv_error_output;
		345
		346	if ((rs = setjmp (jerr.setjmp_buffer)))
		347	{
		348	fclose (fp);
		349	jpeg_destroy_decompress (&cinfo);
		350
		351	if (pb)
		352	g_object_unref ((gpointer)pb);
		353
		354	perlinterp_acquire ();
		355	XSRETURN_UNDEF;
		356	}
		357
		358	jpeg_create_decompress (&cinfo);
		359
		360	jpeg_stdio_src (&cinfo, fp);
		361	jpeg_read_header (&cinfo, TRUE);
		362
		363	cinfo.dct_method = JDCT_DEFAULT;
		364	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
		365	cinfo.do_block_smoothing = FALSE;
		366	cinfo.out_color_space = JCS_RGB;
		367	cinfo.quantize_colors = FALSE;
		368
		369	cinfo.scale_num = 1;
		370	cinfo.scale_denom = 1;
		371
		372	jpeg_calc_output_dimensions (&cinfo);
		373
		374	if (thumbnail)
		375	{
		376	cinfo.dct_method = JDCT_FASTEST;
		377	cinfo.do_fancy_upsampling = FALSE;
		378
		379	while (cinfo.scale_denom < 8
		380	&& cinfo.output_width >= iw*4
		381	&& cinfo.output_height >= ih*4)
		382	{
		383	cinfo.scale_denom <<= 1;
		384	jpeg_calc_output_dimensions (&cinfo);
		385	}
		386	}
		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
		397	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
		398	if (!RETVAL)
		399	longjmp (jerr.setjmp_buffer, 2);
		400
143	dst = gdk_pixbuf_get_pixels (RETVAL);	401	data = gdk_pixbuf_get_pixels (RETVAL);
144	dstr = gdk_pixbuf_get_rowstride (RETVAL);	402	rs = gdk_pixbuf_get_rowstride (RETVAL);
145		403
		404	jpeg_start_decompress (&cinfo);
		405
		406	while (cinfo.output_scanline < cinfo.output_height)
		407	{
		408	int remaining = cinfo.output_height - cinfo.output_scanline;
		409	JSAMPROW rp[4];
		410
		411	rp [0] = data + cinfo.output_scanline * rs;
		412	rp [1] = (guchar *)rp [0] + rs;
		413	rp [2] = (guchar *)rp [1] + rs;
		414	rp [3] = (guchar *)rp [2] + rs;
		415
		416	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
		417	}
		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
		439	jpeg_finish_decompress (&cinfo);
		440	fclose (fp);
		441	jpeg_destroy_decompress (&cinfo);
		442	perlinterp_acquire ();
		443	}
		444	OUTPUT:
		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)
146	for (y = 0; y < h; y++)	473	for (y = 0; y < h; y++)
		474	{
		475	guchar pa_ = pa + y sa;
		476	guchar pb_ = pb + y sb;
		477
147	for (x = 0; x < w; x++)	478	for (x = 0; x < w; x++)
148	for (i = 0; i < bpp; i++)	479	{
149	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];	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.)));
150	}	493	}
151	OUTPUT:
152	RETVAL
153		494
154	#############################################################################	495	#############################################################################
155		496
156	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	497	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
157		498
		499	# currently only works for filenames (octet strings)
		500
		501	SV *
		502	foldcase (SV *pathsv)
		503	PROTOTYPE: $
		504	CODE:
		505	{
		506	STRLEN plen;
		507	U8 path = (U8 )SvPV (pathsv, plen);
		508	U8 *pend = path + plen;
		509	U8 dst [plen * 6 * 3], *dstp = dst;
		510
		511	while (path < pend)
		512	{
		513	U8 ch = *path;
		514
		515	if (ch >= 'a' && ch <= 'z')
		516	dstp++ = path++;
		517	else if (ch >= 'A' && ch <= 'Z')
		518	dstp++ = path++ + ('a' - 'A');
		519	else if (ch >= '0' && ch <= '9')
		520	{
		521	STRLEN el, nl = 0;
		522	while (path >= '0' && path <= '9' && path < pend)
		523	path++, nl++;
		524
		525	for (el = nl; el < 6; el++)
		526	*dstp++ = '0';
		527
		528	memcpy (dstp, path - nl, nl);
		529	dstp += nl;
		530	}
		531	else
		532	dstp++ = path++;
		533	#if 0
		534	else
		535	{
		536	STRLEN cl;
		537	to_utf8_fold (path, dstp, &cl);
		538	dstp += cl;
		539	path += is_utf8_char (path);
		540	}
		541	#endif
		542	}
		543
		544	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		545	}
		546	OUTPUT:
		547	RETVAL
		548
158	GdkPixbuf_noinc *	549	GdkPixbuf_noinc *
159	p7_to_pb (int w, int h, guchar *src)	550	p7_to_pb (int w, int h, SV *src_sv)
		551	PROTOTYPE: @
160	CODE:	552	CODE:
161	{	553	{
162	int x, y;	554	int x, y;
163	guchar dst, d;	555	guchar dst, d;
164	int dstr;	556	int dstr;
		557	guchar src = (guchar )SvPVbyte_nolen (src_sv);
165		558
166	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	559	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
167	dst = gdk_pixbuf_get_pixels (RETVAL);	560	dst = gdk_pixbuf_get_pixels (RETVAL);
168	dstr = gdk_pixbuf_get_rowstride (RETVAL);	561	dstr = gdk_pixbuf_get_rowstride (RETVAL);
169		562
…		…
178	}	571	}
179	}	572	}
180	OUTPUT:	573	OUTPUT:
181	RETVAL	574	RETVAL
182		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
183	SV *	624	SV *
184	pb_to_p7 (GdkPixbuf *pb)	625	pb_to_hv84 (GdkPixbuf *pb)
185	CODE:	626	CODE:
186	{	627	{
187	int w = gdk_pixbuf_get_width (pb);	628	int w = gdk_pixbuf_get_width (pb);
188	int h = gdk_pixbuf_get_height (pb);	629	int h = gdk_pixbuf_get_height (pb);
189	int x, y;	630	int x, y;
190	guchar *dst;	631	guchar *dst;
191	int bpp = gdk_pixbuf_get_n_channels (pb);	632	int bpp = gdk_pixbuf_get_n_channels (pb);
192	guchar *src = gdk_pixbuf_get_pixels (pb);	633	guchar *src = gdk_pixbuf_get_pixels (pb);
193	int sstr = gdk_pixbuf_get_rowstride (pb);	634	int sstr = gdk_pixbuf_get_rowstride (pb);
194	int Er[IW], Eg[IW], Eb[IW];
195	int seed = 77;
196
197	RETVAL = newSV (w * h);
198	SvPOK_only (RETVAL);
199	SvCUR_set (RETVAL, w * h);
200
201	dst = SvPVX (RETVAL);
202
203	memset (Er, 0, sizeof (int) * IW);
204	memset (Eg, 0, sizeof (int) * IW);
205	memset (Eb, 0, sizeof (int) * IW);
206
207	/* some primitive error distribution + random dithering */
208
209	for (y = 0; y < h; y++)
210	{
211	int er = 0, eg = 0, eb = 0;
212
213	for (x = 0; x < w; x++)
214	{
215	int r, g, b;
216	guchar p = src + x bpp + y * sstr;
217
218	r = ((p[0] + er + Er[x]) * 7 + 128) / 255;
219	g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;
220	b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;
221
222	r = r > 7 ? 7 : r < 0 ? 0 : r;
223	g = g > 7 ? 7 : g < 0 ? 0 : g;
224	b = b > 3 ? 3 : b < 0 ? 0 : b;
225
226	er += p[0] - (r * 255 + 4) / 7;
227	eg += p[1] - (g * 255 + 4) / 7;
228	eb += p[2] - (b * 255 + 2) / 3;
229
230	Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;
231	Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;
232	Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;
233
234	*dst++ = r << 5 \| g << 2 \| b;
235	}
236	}
237	}
238	OUTPUT:
239	RETVAL
240
241	SV *
242	make_histogram (SV *ar)
243	CODE:
244	{
245	int i;
246	AV av, result;
247
248	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
249	croak ("Not an array ref as first argument to make_histogram");
250
251	av = (AV *) SvRV (ar);
252	result = newAV ();
253
254	for (i = 0; i <= av_len (av); ++i)
255	{
256	int bigst, j;
257	SV sv = av_fetch (av, i, 1);
258	STRLEN len;
259	char *buf = SvPVbyte (sv, len);
260
261	int tmphist[256];
262	char *hist;
263
264	SV *histsv = newSV (257);
265	sv_upgrade (histsv, SVt_PV);
266	SvCUR_set (histsv, 256);
267	hist = SvPV_nolen (histsv);
268
269	Zero (tmphist, 256, int);
270
271	while (len--)
272	++tmphist[(unsigned char)*buf++];
273
274	bigst = 1;
275	for (j = 0; j < 256; ++j)
276	if (tmphist[j] > bigst)
277	bigst = tmphist[j];
278
279	for (j = 0; j < 256; ++j)
280	hist[j] = tmphist[j] * 255 / bigst;
281
282	av_push (result, histsv);
283	}
284
285	RETVAL = newRV_noinc ((SV *)result);
286	}
287	OUTPUT:
288	RETVAL
289
290
291
292	#############################################################################
293
294	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
295
296	void
297	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
298	CODE:
299	{
300	int w = gdk_pixbuf_get_width (pb);
301	int h = gdk_pixbuf_get_height (pb);
302	int x, y, i;
303	guchar *dst;
304	int bpp = gdk_pixbuf_get_n_channels (pb);
305	guchar *src = gdk_pixbuf_get_pixels (pb);
306	int sstr = gdk_pixbuf_get_rowstride (pb);
307
308	a85_init ();
309
310	for (y = 0; y < h; y++)
311	for (x = 0; x < w; x++)
312	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
313	a85_push (fp, src [x * bpp + y * sstr + i]);
314
315	a85_finish (fp);
316	}
317
318	void
319	dump_binary (PerlIO fp, GdkPixbuf pb)
320	CODE:
321	{
322	int w = gdk_pixbuf_get_width (pb);
323	int h = gdk_pixbuf_get_height (pb);
324	int x, y, i;
325	guchar *dst;
326	int bpp = gdk_pixbuf_get_n_channels (pb);
327	guchar *src = gdk_pixbuf_get_pixels (pb);
328	int sstr = gdk_pixbuf_get_rowstride (pb);
329
330	for (y = 0; y < h; y++)
331	for (x = 0; x < w; x++)
332	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
333	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
334	}
335
336	#############################################################################
337
338	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
339
340	SV *
341	pb_to_hv84 (GdkPixbuf *pb)
342	CODE:
343	{
344	int w = gdk_pixbuf_get_width (pb);
345	int h = gdk_pixbuf_get_height (pb);
346	int x, y;
347	guchar *dst;
348	int bpp = gdk_pixbuf_get_n_channels (pb);
349	guchar *src = gdk_pixbuf_get_pixels (pb);
350	int sstr = gdk_pixbuf_get_rowstride (pb);
351		635
352	RETVAL = newSV (6 * 8 * 12 / 8);	636	RETVAL = newSV (6 * 8 * 12 / 8);
353	SvPOK_only (RETVAL);	637	SvPOK_only (RETVAL);
354	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	638	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
355		639
356	dst = SvPVX (RETVAL);	640	dst = (guchar *)SvPVX (RETVAL);
357		641
358	/* some primitive error distribution + random dithering */	642	/* some primitive error distribution + random dithering */
359		643
360	for (y = 0; y < h; y++)	644	for (y = 0; y < h; y++)
361	{	645	{
…		…
419	}	703	}
420	}	704	}
421	OUTPUT:	705	OUTPUT:
422	RETVAL	706	RETVAL
423		707
		708	#############################################################################
424		709
		710	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
425		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 1.11 by root, Tue Feb 8 10:43:44 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 1.11 by root, Tue Feb 8 10:43:44 2005 UTC vs.
Revision 1.48 by root, Wed May 24 05:00:57 2017 UTC