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

Comparing CV/CV.xs (file contents):
Revision 1.7 by root, Wed Nov 12 23:54:54 2003 UTC vs.
Revision 1.51 by root, Sat Dec 23 04:11:49 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>
		14	#include <gdk/gdkx.h>
5	#include <gdk-pixbuf/gdk-pixbuf.h>	15	#include <gdk-pixbuf/gdk-pixbuf.h>
6		16
7	#include <gperl.h>	17	#include <gperl.h>
8	#include <gtk2perl.h>	18	#include <gtk2perl.h>
9		19
10	#define IW 80	20	#include <assert.h>
		21
		22	#if WEBP
		23	#include <webp/decode.h>
		24	#endif
		25
		26	#include "perlmulticore.h"
		27
		28	#define IW 80 /* MUST match Schnauzer.pm! */
		29	#define IH 60 /* MUST match Schnauzer.pm! */
11		30
12	#define RAND (seed = (seed + 7141) * 54773 % 134456)	31	#define RAND (seed = (seed + 7141) * 54773 % 134456)
13		32
14	#define LINELENGTH 240	33	#define LINELENGTH 240
15		34
16	#define ELLIPSIS "\xe2\x80\xa6"	35	#define ELLIPSIS "\xe2\x80\xa6"
		36
		37	typedef char *octet_string;
		38
		39	static magic_t magic_cookie[2]; /* !mime, mime */
		40
		41	struct jpg_err_mgr
		42	{
		43	struct jpeg_error_mgr err;
		44	jmp_buf setjmp_buffer;
		45	};
		46
		47	static void
		48	cv_error_exit (j_common_ptr cinfo)
		49	{
		50	cinfo->err->output_message (cinfo);
		51	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
		52	}
		53
		54	static void
		55	cv_error_output (j_common_ptr cinfo)
		56	{
		57	char msg[JMSG_LENGTH_MAX];
		58
		59	cinfo->err->format_message (cinfo, msg);
		60
		61	fprintf (stderr, "JPEG decoding error: %s\n", msg);
		62	return;
		63	}
		64
		65	static void
		66	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
		67	unsigned int h, unsigned int s, unsigned int *v)
		68	{
		69	unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
		70	unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
		71	unsigned int delta = mx - mn;
		72
		73	*v = mx;
		74
		75	s = mx ? delta 255 / mx : 0;
		76
		77	if (delta == 0)
		78	*h = 0;
		79	else
		80	{
		81	if (r == mx)
		82	h = ((int)g - (int)b) 255 / (int)(delta * 3);
		83	else if (g == mx)
		84	h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
		85	else if (b == mx)
		86	h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
		87
		88	*h &= 255;
		89	}
		90	}
		91
		92	struct feature {
		93	float v1, v2, v3; // mean, square, cube
		94	int n;
		95	};
		96
		97	static void
		98	feature_init (struct feature *f)
		99	{
		100	f->v1 = 0.;
		101	f->v2 = 0.;
		102	f->v3 = 0.;
		103	f->n = 0;
		104	}
		105
		106	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		107	// elmex ist schuld.
		108	static void
		109	feature_update_pass_1 (struct feature *f, unsigned int v)
		110	{
		111	f->v1 += v;
		112	f->n += 1;
		113	}
		114
		115	static void
		116	feature_finish_pass_1 (struct feature *f)
		117	{
		118	if (f->n < 1)
		119	return;
		120
		121	f->v1 /= f->n;
		122	}
		123
		124	static void
		125	feature_update_pass_2 (struct feature *f, unsigned int v)
		126	{
		127	float d = v - f->v1;
		128
		129	f->v2 += d * d;
		130	f->v3 += d * d * d;
		131	}
		132
		133	static void
		134	feature_finish_pass_2 (struct feature *f)
		135	{
		136	if (f->n < 1)
		137	return;
		138
		139	f->v2 /= f->n;
		140	f->v3 /= f->n;
		141
		142	f->v1 /= 255.;
		143	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		144	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		145	}
17		146
18	static guint32 a85_val;	147	static guint32 a85_val;
19	static guint a85_cnt;	148	static guint a85_cnt;
20	static guchar a85_buf[LINELENGTH], *a85_ptr;	149	static guchar a85_buf[LINELENGTH], *a85_ptr;
21		150
34	if (!--a85_cnt)	163	if (!--a85_cnt)
35	{	164	{
36	a85_cnt = 4;	165	a85_cnt = 4;
37	if (a85_val)	166	if (a85_val)
38	{	167	{
39	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;	168	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
40	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;	169	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
41	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;	170	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
42	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;	171	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
43	a85_ptr[0] = (a85_val ) + 33;	172	a85_ptr[0] = (a85_val ) + 33;
44		173
45	a85_ptr += 5;	174	a85_ptr += 5;
46	}	175	}
…		…
55	}	184	}
56	}	185	}
57		186
58	}	187	}
59		188
		189	static void
60	a85_finish (PerlIO *fp)	190	a85_finish (PerlIO *fp)
61	{	191	{
62	while (a85_cnt != 4)	192	while (a85_cnt != 4)
63	a85_push (fp, 0);	193	a85_push (fp, 0);
64		194
…		…
69	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	199	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
70	}	200	}
71		201
72	/////////////////////////////////////////////////////////////////////////////	202	/////////////////////////////////////////////////////////////////////////////
73		203
74	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow	204	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
75		205
76	PROTOTYPES: ENABLE	206	PROTOTYPES: ENABLE
77		207
		208	# missing function in perl. really :)
		209	int
		210	common_prefix_length (a, b)
		211	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		212	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		213	CODE:
		214	RETVAL = 0;
		215
		216	while (a == b && *a)
		217	{
		218	RETVAL += (*a & 0xc0) != 0x80;
		219	a++, b++;
		220	}
		221
		222	OUTPUT:
		223	RETVAL
		224
		225	const char *
		226	magic (SV *path_or_data)
		227	ALIAS:
		228	magic = 0
		229	magic_mime = 1
		230	magic_buffer = 2
		231	magic_buffer_mime = 3
		232	CODE:
		233	{
		234	STRLEN len;
		235	char *data = SvPVbyte (path_or_data, len);
		236
		237	perlinterp_release ();
		238
		239	if (!magic_cookie[0])
		240	{
		241	magic_cookie[0] = magic_open (MAGIC_SYMLINK);
		242	magic_cookie[1] = magic_open (MAGIC_SYMLINK \| MAGIC_MIME);
		243	}
		244
		245	RETVAL = ix & 2
		246	? magic_buffer (magic_cookie[ix], data, len)
		247	: magic_file (magic_cookie[ix], data);
		248
		249	perlinterp_acquire ();
		250	}
		251	OUTPUT:
		252	RETVAL
		253
		254	# missing/broken in Gtk2 perl module
		255
		256	void
		257	gdk_window_clear_hints (GdkWindow *window)
		258	CODE:
		259	gdk_window_set_geometry_hints (window, 0, 0);
		260
		261	gboolean
		262	gdk_net_wm_supports (GdkAtom property)
		263	CODE:
		264	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		265	RETVAL = gdk_net_wm_supports (property);
		266	#else
		267	RETVAL = 0;
		268	#endif
		269	OUTPUT:
		270	RETVAL
		271
78	GdkPixbuf_noinc *	272	GdkPixbuf_noinc *
79	transpose (GdkPixbuf *pb)	273	dealpha_expose (GdkPixbuf *pb)
80	CODE:	274	CODE:
		275	perlinterp_release ();
81	{	276	{
82	int w = gdk_pixbuf_get_width (pb);	277	int w = gdk_pixbuf_get_width (pb);
83	int h = gdk_pixbuf_get_height (pb);	278	int h = gdk_pixbuf_get_height (pb);
84	int bpp = gdk_pixbuf_get_n_channels (pb);	279	int bpp = gdk_pixbuf_get_n_channels (pb);
85	int x, y, i;	280	int x, y, i;
86	guchar src = gdk_pixbuf_get_pixels (pb), dst;	281	guchar src = gdk_pixbuf_get_pixels (pb), dst;
87	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	282	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
88		283
89	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	284	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
90		285
91	dst = gdk_pixbuf_get_pixels (RETVAL);	286	dst = gdk_pixbuf_get_pixels (RETVAL);
92	dstr = gdk_pixbuf_get_rowstride (RETVAL);	287	dstr = gdk_pixbuf_get_rowstride (RETVAL);
93		288
94	for (y = 0; y < h; y++)
95	for (x = 0; x < w; x++)	289	for (x = 0; x < w; x++)
		290	for (y = 0; y < h; y++)
96	for (i = 0; i < bpp; i++)	291	for (i = 0; i < 3; i++)
97	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	292	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
98	}	293	}
		294	perlinterp_acquire ();
99	OUTPUT:	295	OUTPUT:
100	RETVAL	296	RETVAL
101		297
102	GdkPixbuf_noinc *	298	GdkPixbuf_noinc *
103	flop (GdkPixbuf *pb)	299	rotate (GdkPixbuf *pb, int angle)
104	CODE:	300	CODE:
105	{	301	perlinterp_release ();
106	int w = gdk_pixbuf_get_width (pb);	302	if (angle < 0)
107	int h = gdk_pixbuf_get_height (pb);	303	angle += 360;
108	int bpp = gdk_pixbuf_get_n_channels (pb);	304	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
109	int x, y, i;	305	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
110	guchar src = gdk_pixbuf_get_pixels (pb), dst;	306	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
111	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	307	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
112		308	: angle);
113	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	309	perlinterp_acquire ();
114
115	dst = gdk_pixbuf_get_pixels (RETVAL);
116	dstr = gdk_pixbuf_get_rowstride (RETVAL);
117
118	for (y = 0; y < h; y++)
119	for (x = 0; x < w; x++)
120	for (i = 0; i < bpp; i++)
121	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
122	}
123	OUTPUT:	310	OUTPUT:
124	RETVAL	311	RETVAL
125		312
		313	GdkPixbuf_noinc *
		314	decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		315	CODE:
		316	{
		317	#if WEBP
		318	guchar *data;
		319	STRLEN data_size;
		320	int alpha;
		321	WebPDecoderConfig config;
		322	int inw, inh;
		323
		324	data = SvPVbyte (image_data, data_size);
		325
		326	perlinterp_release ();
		327
		328	RETVAL = 0;
		329
		330	if (!WebPInitDecoderConfig (&config))
		331	goto err;
		332
		333	config.options.use_threads = 1;
		334
		335	if (WebPGetFeatures (data, data_size, &config.input) != VP8_STATUS_OK)
		336	goto err;
		337
		338	inw = config.input.width;
		339	inh = config.input.height;
		340
		341	if (thumbnail)
		342	{
		343	if (inw * ih > inh * iw)
		344	ih = (iw * inh + inw - 1) / inw;
		345	else
		346	iw = (ih * inw + inh - 1) / inh;
		347
		348	config.options.bypass_filtering = 1;
		349	config.options.no_fancy_upsampling = 1;
		350
		351	config.options.use_scaling = 1;
		352	config.options.scaled_width = iw;
		353	config.options.scaled_height = ih;
		354	}
		355	else
		356	{
		357	iw = inw;
		358	ih = inh;
		359	}
		360
		361	alpha = config.input.has_alpha;
		362
		363	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!alpha, 8, iw, ih);
		364	if (!RETVAL)
		365	goto err;
		366
		367	config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
		368	config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
		369	config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
		370	config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
		371	config.output.is_external_memory = 1;
		372
		373	if (WebPDecode (data, data_size, &config) != VP8_STATUS_OK)
		374	{
		375	g_object_unref (RETVAL);
		376	RETVAL = 0;
		377	goto err;
		378	}
		379
		380	err:
		381	perlinterp_acquire ();
		382	#else
		383	croak ("load_webp: webp not enabled at compile time");
		384	#endif
		385	}
		386	OUTPUT:
		387	RETVAL
		388
		389	GdkPixbuf_noinc *
		390	load_jpeg (SV *path, int thumbnail = 0, int iw = 0, int ih = 0)
		391	CODE:
		392	{
		393	struct jpeg_decompress_struct cinfo;
		394	struct jpg_err_mgr jerr;
		395	guchar *data;
		396	int rs;
		397	FILE *fp;
		398	volatile GdkPixbuf *pb = 0;
		399
		400	RETVAL = 0;
		401
		402	fp = fopen (SvPVbyte_nolen (path), "rb");
		403
		404	if (!fp)
		405	XSRETURN_UNDEF;
		406
		407	perlinterp_release ();
		408
		409	cinfo.err = jpeg_std_error (&jerr.err);
		410
		411	jerr.err.error_exit = cv_error_exit;
		412	jerr.err.output_message = cv_error_output;
		413
		414	if ((rs = setjmp (jerr.setjmp_buffer)))
		415	{
		416	fclose (fp);
		417	jpeg_destroy_decompress (&cinfo);
		418
		419	if (pb)
		420	g_object_unref ((gpointer)pb);
		421
		422	perlinterp_acquire ();
		423	XSRETURN_UNDEF;
		424	}
		425
		426	jpeg_create_decompress (&cinfo);
		427
		428	jpeg_stdio_src (&cinfo, fp);
		429	jpeg_read_header (&cinfo, TRUE);
		430
		431	cinfo.dct_method = JDCT_DEFAULT;
		432	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
		433	cinfo.do_block_smoothing = FALSE;
		434	cinfo.out_color_space = JCS_RGB;
		435	cinfo.quantize_colors = FALSE;
		436
		437	cinfo.scale_num = 1;
		438	cinfo.scale_denom = 1;
		439
		440	jpeg_calc_output_dimensions (&cinfo);
		441
		442	if (thumbnail)
		443	{
		444	cinfo.dct_method = JDCT_FASTEST;
		445	cinfo.do_fancy_upsampling = FALSE;
		446
		447	while (cinfo.scale_denom < 8
		448	&& cinfo.output_width >= iw*4
		449	&& cinfo.output_height >= ih*4)
		450	{
		451	cinfo.scale_denom <<= 1;
		452	jpeg_calc_output_dimensions (&cinfo);
		453	}
		454	}
		455
		456	if (cinfo.output_components != 3)
		457	longjmp (jerr.setjmp_buffer, 3);
		458
		459	if (cinfo.jpeg_color_space == JCS_YCCK \|\| cinfo.jpeg_color_space == JCS_CMYK)
		460	{
		461	cinfo.out_color_space = JCS_CMYK;
		462	cinfo.output_components = 4;
		463	}
		464
		465	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
		466	if (!RETVAL)
		467	longjmp (jerr.setjmp_buffer, 2);
		468
		469	data = gdk_pixbuf_get_pixels (RETVAL);
		470	rs = gdk_pixbuf_get_rowstride (RETVAL);
		471
		472	jpeg_start_decompress (&cinfo);
		473
		474	while (cinfo.output_scanline < cinfo.output_height)
		475	{
		476	int remaining = cinfo.output_height - cinfo.output_scanline;
		477	JSAMPROW rp[4];
		478
		479	rp [0] = data + cinfo.output_scanline * rs;
		480	rp [1] = (guchar *)rp [0] + rs;
		481	rp [2] = (guchar *)rp [1] + rs;
		482	rp [3] = (guchar *)rp [2] + rs;
		483
		484	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
		485	}
		486
		487	if (cinfo.out_color_space == JCS_CMYK)
		488	{
		489	guchar end = data + cinfo.output_height rs;
		490
		491	while (data < end)
		492	{
		493	U32 c = data [0];
		494	U32 m = data [1];
		495	U32 y = data [2];
		496	U32 k = data [3];
		497
		498	if (0)
		499	if (cinfo.Adobe_transform == 2)
		500	{
		501	c ^= 0xff;
		502	m ^= 0xff;
		503	y ^= 0xff;
		504	k ^= 0xff;
		505	}
		506
		507	data [0] = (c * k + 0x80) / 0xff;
		508	data [1] = (m * k + 0x80) / 0xff;
		509	data [2] = (y * k + 0x80) / 0xff;
		510	data [3] = 0xff;
		511
		512	data += 4;
		513	}
		514	}
		515
		516	jpeg_finish_decompress (&cinfo);
		517	fclose (fp);
		518	jpeg_destroy_decompress (&cinfo);
		519	perlinterp_acquire ();
		520	}
		521	OUTPUT:
		522	RETVAL
		523
		524	void
		525	compare (GdkPixbuf a, GdkPixbuf b)
		526	PPCODE:
		527	perlinterp_release ();
		528	{
		529	int w = gdk_pixbuf_get_width (a);
		530	int h = gdk_pixbuf_get_height (a);
		531
		532	int sa = gdk_pixbuf_get_rowstride (a);
		533	int sb = gdk_pixbuf_get_rowstride (b);
		534
		535	guchar *pa = gdk_pixbuf_get_pixels (a);
		536	guchar *pb = gdk_pixbuf_get_pixels (b);
		537
		538	int x, y;
		539
		540	assert (w == gdk_pixbuf_get_width (b));
		541	assert (h == gdk_pixbuf_get_height (b));
		542
		543	assert (gdk_pixbuf_get_n_channels (a) == 3);
		544	assert (gdk_pixbuf_get_n_channels (b) == 3);
		545
		546	double diff = 0.;
		547	int peak = 0;
		548
		549	if (w && h)
		550	for (y = 0; y < h; y++)
		551	{
		552	guchar pa_ = pa + y sa;
		553	guchar pb_ = pb + y sb;
		554
		555	for (x = 0; x < w; x++)
		556	{
		557	int d;
		558
		559	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		560	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		561	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		562	}
		563	}
		564
		565	perlinterp_acquire ();
		566
		567	EXTEND (SP, 2);
		568	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		569	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		570	}
		571
126	#############################################################################	572	#############################################################################
127		573
128	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	574	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
129		575
		576	# currently only works for filenames (octet strings)
		577
		578	SV *
		579	foldcase (SV *pathsv)
		580	PROTOTYPE: $
		581	CODE:
		582	{
		583	STRLEN plen;
		584	U8 path = (U8 )SvPV (pathsv, plen);
		585	U8 *pend = path + plen;
		586	U8 dst [plen * 6 * 3], *dstp = dst;
		587
		588	while (path < pend)
		589	{
		590	U8 ch = *path;
		591
		592	if (ch >= 'a' && ch <= 'z')
		593	dstp++ = path++;
		594	else if (ch >= 'A' && ch <= 'Z')
		595	dstp++ = path++ + ('a' - 'A');
		596	else if (ch >= '0' && ch <= '9')
		597	{
		598	STRLEN el, nl = 0;
		599	while (path >= '0' && path <= '9' && path < pend)
		600	path++, nl++;
		601
		602	for (el = nl; el < 6; el++)
		603	*dstp++ = '0';
		604
		605	memcpy (dstp, path - nl, nl);
		606	dstp += nl;
		607	}
		608	else
		609	dstp++ = path++;
		610	#if 0
		611	else
		612	{
		613	STRLEN cl;
		614	to_utf8_fold (path, dstp, &cl);
		615	dstp += cl;
		616	path += is_utf8_char (path);
		617	}
		618	#endif
		619	}
		620
		621	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		622	}
		623	OUTPUT:
		624	RETVAL
		625
130	GdkPixbuf_noinc *	626	GdkPixbuf_noinc *
131	p7_to_pb (int w, int h, guchar *src)	627	p7_to_pb (int w, int h, SV *src_sv)
		628	PROTOTYPE: @
132	CODE:	629	CODE:
133	{	630	{
134	int x, y;	631	int x, y;
135	guchar dst, d;	632	guchar dst, d;
136	int dstr;	633	int dstr;
		634	guchar src = (guchar )SvPVbyte_nolen (src_sv);
137		635
138	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	636	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
139	dst = gdk_pixbuf_get_pixels (RETVAL);	637	dst = gdk_pixbuf_get_pixels (RETVAL);
140	dstr = gdk_pixbuf_get_rowstride (RETVAL);	638	dstr = gdk_pixbuf_get_rowstride (RETVAL);
141		639
…		…
150	}	648	}
151	}	649	}
152	OUTPUT:	650	OUTPUT:
153	RETVAL	651	RETVAL
154		652
		653	#############################################################################
		654
		655	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		656
		657	void
		658	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		659	CODE:
		660	{
		661	int w = gdk_pixbuf_get_width (pb);
		662	int h = gdk_pixbuf_get_height (pb);
		663	int x, y, i;
		664	guchar *dst;
		665	int bpp = gdk_pixbuf_get_n_channels (pb);
		666	guchar *src = gdk_pixbuf_get_pixels (pb);
		667	int sstr = gdk_pixbuf_get_rowstride (pb);
		668
		669	a85_init ();
		670
		671	for (y = 0; y < h; y++)
		672	for (x = 0; x < w; x++)
		673	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		674	a85_push (fp, src [x * bpp + y * sstr + i]);
		675
		676	a85_finish (fp);
		677	}
		678
		679	void
		680	dump_binary (PerlIO fp, GdkPixbuf pb)
		681	CODE:
		682	{
		683	int w = gdk_pixbuf_get_width (pb);
		684	int h = gdk_pixbuf_get_height (pb);
		685	int x, y, i;
		686	guchar *dst;
		687	int bpp = gdk_pixbuf_get_n_channels (pb);
		688	guchar *src = gdk_pixbuf_get_pixels (pb);
		689	int sstr = gdk_pixbuf_get_rowstride (pb);
		690
		691	for (y = 0; y < h; y++)
		692	for (x = 0; x < w; x++)
		693	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		694	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		695	}
		696
		697	#############################################################################
		698
		699	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		700
155	SV *	701	SV *
156	pb_to_p7 (GdkPixbuf *pb)	702	pb_to_hv84 (GdkPixbuf *pb)
157	CODE:	703	CODE:
158	{	704	{
159	int w = gdk_pixbuf_get_width (pb);	705	int w = gdk_pixbuf_get_width (pb);
160	int h = gdk_pixbuf_get_height (pb);	706	int h = gdk_pixbuf_get_height (pb);
161	int x, y;	707	int x, y;
162	guchar *dst;	708	guchar *dst;
163	int bpp = gdk_pixbuf_get_n_channels (pb);	709	int bpp = gdk_pixbuf_get_n_channels (pb);
164	guchar *src = gdk_pixbuf_get_pixels (pb);	710	guchar *src = gdk_pixbuf_get_pixels (pb);
165	int sstr = gdk_pixbuf_get_rowstride (pb);	711	int sstr = gdk_pixbuf_get_rowstride (pb);
166	int Er[IW], Eg[IW], Eb[IW];
167	int seed = 77;
168		712
169	RETVAL = newSV (w * h);	713	RETVAL = newSV (6 * 8 * 12 / 8);
170	SvPOK_only (RETVAL);	714	SvPOK_only (RETVAL);
171	SvCUR_set (RETVAL, w * h);	715	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
172		716
173	dst = SvPVX (RETVAL);	717	dst = (guchar *)SvPVX (RETVAL);
174
175	memset (Er, 0, sizeof (int) * IW);
176	memset (Eg, 0, sizeof (int) * IW);
177	memset (Eb, 0, sizeof (int) * IW);
178		718
179	/* some primitive error distribution + random dithering */	719	/* some primitive error distribution + random dithering */
180		720
181	for (y = 0; y < h; y++)	721	for (y = 0; y < h; y++)
182	{	722	{
183	int er = 0, eg = 0, eb = 0;	723	guchar p = src + y sstr;
184		724
185	for (x = 0; x < w; x++)	725	for (x = 0; x < w; x += 2)
186	{	726	{
187	int r, g, b;	727	unsigned int r, g, b, h, s, v, H, V1, V2;
188	guchar p = src + x bpp + y * sstr;
189		728
190	r = ((p[0] + er + Er[x]) * 7 + 128) / 255;	729	if (bpp == 3)
191	g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;	730	r = p++, g = p++, b = *p++;
192	b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;	731	else if (bpp == 1)
		732	r = g = b = *p++;
		733	else
		734	abort ();
193		735
194	r = r > 7 ? 7 : r < 0 ? 0 : r;	736	rgb_to_hsv (r, g, b, &h, &s, &v);
195	g = g > 7 ? 7 : g < 0 ? 0 : g;
196	b = b > 3 ? 3 : b < 0 ? 0 : b;
197		737
198	er += p[0] - (r * 255 + 4) / 7;	738	H = (h * 15 / 255) << 4;
199	eg += p[1] - (g * 255 + 4) / 7;	739	V1 = v;
200	eb += p[2] - (b * 255 + 2) / 3;
201		740
202	Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;	741	if (bpp == 3)
203	Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;	742	r = p++, g = p++, b = *p++;
204	Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;	743	else if (bpp == 1)
		744	r = g = b = *p++;
		745	else
		746	abort ();
205		747
206	*dst++ = r << 5 \| g << 2 \| b;	748	rgb_to_hsv (r, g, b, &h, &s, &v);
		749
		750	H \|= h * 15 / 255;
		751	V2 = v;
		752
		753	*dst++ = H;
		754	*dst++ = V1;
		755	*dst++ = V2;
207	}	756	}
208	}	757	}
209	}	758	}
210	OUTPUT:	759	OUTPUT:
211	RETVAL	760	RETVAL
212		761
		762	SV *
		763	hv84_to_av (unsigned char *hv84)
		764	CODE:
		765	{
		766	int i = 72 / 3;
		767	AV *av = newAV ();
		768
		769	RETVAL = (SV )newRV_noinc ((SV )av);
		770	while (i--)
		771	{
		772	int h = *hv84++;
		773	int v1 = *hv84++;
		774	int v2 = *hv84++;
		775
		776	av_push (av, newSViv (v1));
		777	av_push (av, newSViv ((h >> 4) * 255 / 15));
		778	av_push (av, newSViv (v2));
		779	av_push (av, newSViv ((h & 15) * 255 / 15));
		780	}
		781	}
		782	OUTPUT:
		783	RETVAL
		784
213	#############################################################################	785	#############################################################################
214		786
215	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript	787	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
216		788
217	void	789	SV *
218	dump_ascii85 (PerlIO fp, GdkPixbuf pb)	790	extract_features (SV *ar)
219	CODE:	791	CODE:
220	{	792	{
221	int w = gdk_pixbuf_get_width (pb);	793	int i;
222	int h = gdk_pixbuf_get_height (pb);	794	AV av, result;
223	int x, y, i;
224	guchar *dst;
225	int bpp = gdk_pixbuf_get_n_channels (pb);
226	guchar *src = gdk_pixbuf_get_pixels (pb);
227	int sstr = gdk_pixbuf_get_rowstride (pb);
228		795
229	a85_init ();	796	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		797	croak ("Not an array ref as first argument to extract_features");
230		798
231	for (y = 0; y < h; y++)	799	av = (AV *) SvRV (ar);
232	for (x = 0; x < w; x++)	800	result = newAV ();
233	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
234	a85_push (fp, src [x * bpp + y * sstr + i]);
235		801
236	a85_finish (fp);	802	for (i = 0; i <= av_len (av); ++i)
237	}	803	{
		804	SV sv = av_fetch (av, i, 1);
		805	SV histsv = newSV (9 sizeof (float) + 1);
238		806
239	void	807	SvPOK_on (histsv);
240	dump_binary (PerlIO fp, GdkPixbuf pb)	808	SvCUR_set (histsv, 9 * sizeof (float));
241	CODE:	809	float hist = (float )SvPVX (histsv);
242	{
243	int w = gdk_pixbuf_get_width (pb);
244	int h = gdk_pixbuf_get_height (pb);
245	int x, y, i;
246	guchar *dst;
247	int bpp = gdk_pixbuf_get_n_channels (pb);
248	guchar *src = gdk_pixbuf_get_pixels (pb);
249	int sstr = gdk_pixbuf_get_rowstride (pb);
250		810
251	for (y = 0; y < h; y++)	811	struct feature f_h, f_s, f_v;
252	for (x = 0; x < w; x++)	812	feature_init (&f_h);
253	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)	813	feature_init (&f_s);
254	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);	814	feature_init (&f_v);
255	}
256		815
		816	{
		817	STRLEN len;
		818	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		819	while (len >= 3)
		820	{
		821	unsigned int r, g, b, h, s, v;
		822	r = buf++; g = buf++; b = *buf++;
		823	rgb_to_hsv (r, g, b, &h, &s, &v);
257		824
		825	feature_update_pass_1 (&f_h, h);
		826	feature_update_pass_1 (&f_s, s);
		827	feature_update_pass_1 (&f_v, v);
258		828
		829	len -= 3;
		830	}
259		831
		832	feature_finish_pass_1 (&f_h);
		833	feature_finish_pass_1 (&f_s);
		834	feature_finish_pass_1 (&f_v);
		835	}
		836
		837	{
		838	STRLEN len;
		839	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		840	while (len >= 3)
		841	{
		842	unsigned int r, g, b, h, s, v;
		843	r = buf++; g = buf++; b = *buf++;
		844	rgb_to_hsv (r, g, b, &h, &s, &v);
		845
		846	feature_update_pass_2 (&f_h, h);
		847	feature_update_pass_2 (&f_s, s);
		848	feature_update_pass_2 (&f_v, v);
		849
		850	len -= 3;
		851	}
		852
		853	feature_finish_pass_2 (&f_h);
		854	feature_finish_pass_2 (&f_s);
		855	feature_finish_pass_2 (&f_v);
		856	}
		857
		858	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		859	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		860	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
		861
		862	av_push (result, histsv);
		863	}
		864
		865	RETVAL = newRV_noinc ((SV *)result);
		866	}
		867	OUTPUT:
		868	RETVAL
		869

Diff Legend

-–
+Removed lines
-+
+Added lines
-<
+Changed lines
->
+Changed lines

Comparing CV/CV.xs (file contents): Revision 1.7 by root, Wed Nov 12 23:54:54 2003 UTC vs. Revision 1.51 by root, Sat Dec 23 04:11:49 2017 UTC

Diff Legend

Comparing CV/CV.xs (file contents):
Revision 1.7 by root, Wed Nov 12 23:54:54 2003 UTC vs.
Revision 1.51 by root, Sat Dec 23 04:11:49 2017 UTC