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

Comparing CV/CV.xs (file contents):
Revision 1.5 by root, Sat Nov 8 22:18:50 2003 UTC vs.
Revision 1.54 by root, Sat Dec 23 08:04:48 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 <jerror.h>
		13
		14	#include <glib.h>
		15	#include <gtk/gtk.h>
		16	#include <gdk/gdkx.h>
5	#include <gdk-pixbuf/gdk-pixbuf.h>	17	#include <gdk-pixbuf/gdk-pixbuf.h>
6		18
7	#include <gperl.h>	19	#include <gperl.h>
8	#include <gtk2perl.h>	20	#include <gtk2perl.h>
9		21
10	#define IW 80	22	#include <assert.h>
		23
		24	#if WEBP
		25	#include <webp/demux.h>
		26	#include <webp/decode.h>
		27	#endif
		28
		29	#include "perlmulticore.h"
		30
		31	#define IW 80 /* MUST match Schnauzer.pm! */
		32	#define IH 60 /* MUST match Schnauzer.pm! */
11		33
12	#define RAND (seed = (seed + 7141) * 54773 % 134456)	34	#define RAND (seed = (seed + 7141) * 54773 % 134456)
		35
		36	#define LINELENGTH 240
		37
		38	#define ELLIPSIS "\xe2\x80\xa6"
		39
		40	typedef char *octet_string;
		41
		42	static magic_t magic_cookie[2]; /* !mime, mime */
		43
		44	struct jpg_err_mgr
		45	{
		46	struct jpeg_error_mgr err;
		47	jmp_buf setjmp_buffer;
		48	};
		49
		50	static void
		51	cv_error_exit (j_common_ptr cinfo)
		52	{
		53	cinfo->err->output_message (cinfo);
		54	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
		55	}
		56
		57	static void
		58	cv_error_output (j_common_ptr cinfo)
		59	{
		60	char msg[JMSG_LENGTH_MAX];
		61
		62	cinfo->err->format_message (cinfo, msg);
		63
		64	fprintf (stderr, "JPEG decoding error: %s\n", msg);
		65	return;
		66	}
		67
		68	static void
		69	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
		70	unsigned int h, unsigned int s, unsigned int *v)
		71	{
		72	unsigned int mx = r; if (g > mx) mx = g; if (b > mx) mx = b;
		73	unsigned int mn = r; if (g < mn) mn = g; if (b < mn) mn = b;
		74	unsigned int delta = mx - mn;
		75
		76	*v = mx;
		77
		78	s = mx ? delta 255 / mx : 0;
		79
		80	if (delta == 0)
		81	*h = 0;
		82	else
		83	{
		84	if (r == mx)
		85	h = ((int)g - (int)b) 255 / (int)(delta * 3);
		86	else if (g == mx)
		87	h = ((int)b - (int)r) 255 / (int)(delta * 3) + 52;
		88	else if (b == mx)
		89	h = ((int)r - (int)g) 255 / (int)(delta * 3) + 103;
		90
		91	*h &= 255;
		92	}
		93	}
		94
		95	struct feature {
		96	float v1, v2, v3; // mean, square, cube
		97	int n;
		98	};
		99
		100	static void
		101	feature_init (struct feature *f)
		102	{
		103	f->v1 = 0.;
		104	f->v2 = 0.;
		105	f->v3 = 0.;
		106	f->n = 0;
		107	}
		108
		109	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		110	// elmex ist schuld.
		111	static void
		112	feature_update_pass_1 (struct feature *f, unsigned int v)
		113	{
		114	f->v1 += v;
		115	f->n += 1;
		116	}
		117
		118	static void
		119	feature_finish_pass_1 (struct feature *f)
		120	{
		121	if (f->n < 1)
		122	return;
		123
		124	f->v1 /= f->n;
		125	}
		126
		127	static void
		128	feature_update_pass_2 (struct feature *f, unsigned int v)
		129	{
		130	float d = v - f->v1;
		131
		132	f->v2 += d * d;
		133	f->v3 += d * d * d;
		134	}
		135
		136	static void
		137	feature_finish_pass_2 (struct feature *f)
		138	{
		139	if (f->n < 1)
		140	return;
		141
		142	f->v2 /= f->n;
		143	f->v3 /= f->n;
		144
		145	f->v1 /= 255.;
		146	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		147	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		148	}
13		149
14	static guint32 a85_val;	150	static guint32 a85_val;
15	static guint a85_cnt;	151	static guint a85_cnt;
16	static guchar a85_buf[80], *a85_ptr;	152	static guchar a85_buf[LINELENGTH], *a85_ptr;
17		153
18	static void	154	static void
19	a85_init (void)	155	a85_init (void)
20	{	156	{
21	a85_cnt = 4;	157	a85_cnt = 4;
30	if (!--a85_cnt)	166	if (!--a85_cnt)
31	{	167	{
32	a85_cnt = 4;	168	a85_cnt = 4;
33	if (a85_val)	169	if (a85_val)
34	{	170	{
35	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;	171	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
36	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;	172	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
37	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;	173	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
38	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;	174	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
39	a85_ptr[0] = (a85_val ) + 33;	175	a85_ptr[0] = (a85_val ) + 33;
40		176
41	a85_ptr += 5;	177	a85_ptr += 5;
42	}	178	}
…		…
51	}	187	}
52	}	188	}
53		189
54	}	190	}
55		191
		192	static void
56	a85_finish (PerlIO *fp)	193	a85_finish (PerlIO *fp)
57	{	194	{
58	while (a85_cnt != 4)	195	while (a85_cnt != 4)
59	a85_push (fp, 0);	196	a85_push (fp, 0);
60		197
…		…
63	*a85_ptr++ = '\n';	200	*a85_ptr++ = '\n';
64		201
65	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	202	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
66	}	203	}
67		204
		205	/////////////////////////////////////////////////////////////////////////////
		206
		207	static void cv_ms_init (j_decompress_ptr cinfo)
		208	{
		209	}
		210
		211	static void cv_ms_term (j_decompress_ptr cinfo)
		212	{
		213	}
		214
		215	static boolean cv_ms_fill (j_decompress_ptr cinfo)
		216	{
		217	ERREXIT (cinfo, JERR_INPUT_EMPTY);
		218
		219	return TRUE;
		220	}
		221
		222	static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes)
		223	{
		224	if (num_bytes > 0)
		225	{
		226	struct jpeg_source_mgr src = (struct jpeg_source_mgr )cinfo->src;
		227
		228	src->next_input_byte += num_bytes;
		229	src->bytes_in_buffer -= num_bytes;
		230	}
		231	}
		232
		233	static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen)
		234	{
		235	struct jpeg_source_mgr *src;
		236
		237	if (!cinfo->src)
		238	cinfo->src = (struct jpeg_source_mgr *)
		239	(*cinfo->mem->alloc_small) (
		240	(j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)
		241	);
		242
		243	src = (struct jpeg_source_mgr *)cinfo->src;
		244	src->init_source = cv_ms_init;
		245	src->fill_input_buffer = cv_ms_fill;
		246	src->skip_input_data = cv_ms_skip;
		247	src->resync_to_restart = jpeg_resync_to_restart;
		248	src->term_source = cv_ms_term;
		249	src->next_input_byte = (JOCTET *)buf;
		250	src->bytes_in_buffer = buflen;
		251	}
		252
		253	/////////////////////////////////////////////////////////////////////////////
		254
68	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow	255	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
69		256
70	PROTOTYPES: ENABLE	257	PROTOTYPES: ENABLE
71		258
		259	# missing function in perl. really :)
		260	int
		261	common_prefix_length (a, b)
		262	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		263	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		264	CODE:
		265	RETVAL = 0;
		266
		267	while (a == b && *a)
		268	{
		269	RETVAL += (*a & 0xc0) != 0x80;
		270	a++, b++;
		271	}
		272
		273	OUTPUT:
		274	RETVAL
		275
		276	const char *
		277	magic (SV *path_or_data)
		278	ALIAS:
		279	magic = 0
		280	magic_mime = 1
		281	magic_buffer = 2
		282	magic_buffer_mime = 3
		283	CODE:
		284	{
		285	STRLEN len;
		286	char *data = SvPVbyte (path_or_data, len);
		287
		288	if (!magic_cookie[0])
		289	{
		290	magic_cookie[0] = magic_open (MAGIC_SYMLINK);
		291	magic_cookie[1] = magic_open (MAGIC_SYMLINK \| MAGIC_MIME_TYPE);
		292	magic_load (magic_cookie[0], 0);
		293	magic_load (magic_cookie[1], 0);
		294	}
		295
		296	perlinterp_release ();
		297
		298	RETVAL = ix & 2
		299	? magic_buffer (magic_cookie[ix & 1], data, len)
		300	: magic_file (magic_cookie[ix & 1], data);
		301
		302	perlinterp_acquire ();
		303	}
		304	OUTPUT:
		305	RETVAL
		306
		307	# missing/broken in Gtk2 perl module
		308
		309	void
		310	gdk_window_clear_hints (GdkWindow *window)
		311	CODE:
		312	gdk_window_set_geometry_hints (window, 0, 0);
		313
		314	gboolean
		315	gdk_net_wm_supports (GdkAtom property)
		316	CODE:
		317	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		318	RETVAL = gdk_net_wm_supports (property);
		319	#else
		320	RETVAL = 0;
		321	#endif
		322	OUTPUT:
		323	RETVAL
		324
72	GdkPixbuf_noinc *	325	GdkPixbuf_noinc *
73	transpose (GdkPixbuf *pb)	326	dealpha_expose (GdkPixbuf *pb)
74	CODE:	327	CODE:
		328	perlinterp_release ();
75	{	329	{
76	int w = gdk_pixbuf_get_width (pb);	330	int w = gdk_pixbuf_get_width (pb);
77	int h = gdk_pixbuf_get_height (pb);	331	int h = gdk_pixbuf_get_height (pb);
78	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;	332	int bpp = gdk_pixbuf_get_n_channels (pb);
79	int x, y, i;	333	int x, y, i;
80	guchar src = gdk_pixbuf_get_pixels (pb), dst;	334	guchar src = gdk_pixbuf_get_pixels (pb), dst;
81	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	335	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
82		336
83	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	337	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
84		338
85	dst = gdk_pixbuf_get_pixels (RETVAL);	339	dst = gdk_pixbuf_get_pixels (RETVAL);
86	dstr = gdk_pixbuf_get_rowstride (RETVAL);	340	dstr = gdk_pixbuf_get_rowstride (RETVAL);
87		341
88	for (y = 0; y < h; y++)
89	for (x = 0; x < w; x++)	342	for (x = 0; x < w; x++)
		343	for (y = 0; y < h; y++)
90	for (i = 0; i < bpp; i++)	344	for (i = 0; i < 3; i++)
91	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	345	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
92	}	346	}
		347	perlinterp_acquire ();
93	OUTPUT:	348	OUTPUT:
94	RETVAL	349	RETVAL
95		350
96	GdkPixbuf_noinc *	351	GdkPixbuf_noinc *
97	flop (GdkPixbuf *pb)	352	rotate (GdkPixbuf *pb, int angle)
98	CODE:	353	CODE:
99	{	354	perlinterp_release ();
100	int w = gdk_pixbuf_get_width (pb);	355	if (angle < 0)
101	int h = gdk_pixbuf_get_height (pb);	356	angle += 360;
102	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;	357	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
103	int x, y, i;	358	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
104	guchar src = gdk_pixbuf_get_pixels (pb), dst;	359	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
105	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	360	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
106		361	: angle);
107	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	362	perlinterp_acquire ();
108
109	dst = gdk_pixbuf_get_pixels (RETVAL);
110	dstr = gdk_pixbuf_get_rowstride (RETVAL);
111
112	for (y = 0; y < h; y++)
113	for (x = 0; x < w; x++)
114	for (i = 0; i < bpp; i++)
115	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
116	}
117	OUTPUT:	363	OUTPUT:
118	RETVAL	364	RETVAL
119		365
		366	const char *
		367	filetype (SV *image_data)
		368	CODE:
		369	{
		370	STRLEN data_len;
		371	U8 *data = SvPVbyte (image_data, data_len);
		372
		373	if (data_len >= 20
		374	&& data[0] == 0xff
		375	&& data[1] == 0xd8
		376	&& data[2] == 0xff)
		377	RETVAL = "jpg";
		378	else if (data_len >= 12
		379	&& data[ 0] == (U8)'R'
		380	&& data[ 1] == (U8)'I'
		381	&& data[ 2] == (U8)'F'
		382	&& data[ 3] == (U8)'F'
		383	&& data[ 8] == (U8)'W'
		384	&& data[ 9] == (U8)'E'
		385	&& data[10] == (U8)'B'
		386	&& data[11] == (U8)'P')
		387	RETVAL = "webp";
		388	else if (data_len >= 16
		389	&& data[ 0] == 0x89
		390	&& data[ 1] == (U8)'P'
		391	&& data[ 2] == (U8)'N'
		392	&& data[ 3] == (U8)'G'
		393	&& data[ 4] == 0x0d
		394	&& data[ 5] == 0x0a
		395	&& data[ 6] == 0x1a
		396	&& data[ 7] == 0x0a)
		397	RETVAL = "png";
		398	else
		399	RETVAL = "other";
		400	}
		401	OUTPUT:
		402	RETVAL
		403
		404	GdkPixbuf_noinc *
		405	decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		406	CODE:
		407	{
		408	#if WEBP
		409	STRLEN data_size;
		410	int alpha;
		411	WebPData data;
		412	WebPDemuxer *demux;
		413	WebPIterator iter;
		414	WebPDecoderConfig config;
		415	int inw, inh;
		416
		417	data.bytes = (uint8_t *)SvPVbyte (image_data, data_size);
		418	data.size = data_size;
		419
		420	perlinterp_release ();
		421
		422	RETVAL = 0;
		423
		424	if (!(demux = WebPDemux (&data)))
		425	goto err_demux;
		426
		427	if (!WebPDemuxGetFrame (demux, 1, &iter))
		428	goto err_iter;
		429
		430	if (!WebPInitDecoderConfig (&config))
		431	goto err_iter;
		432
		433	config.options.use_threads = 1;
		434
		435	if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK)
		436	goto err_iter;
		437
		438	inw = config.input.width;
		439	inh = config.input.height;
		440
		441	if (thumbnail)
		442	{
		443	if (inw * ih > inh * iw)
		444	ih = (iw * inh + inw - 1) / inw;
		445	else
		446	iw = (ih * inw + inh - 1) / inh;
		447
		448	config.options.bypass_filtering = 1;
		449	config.options.no_fancy_upsampling = 1;
		450
		451	config.options.use_scaling = 1;
		452	config.options.scaled_width = iw;
		453	config.options.scaled_height = ih;
		454	}
		455	else
		456	{
		457	iw = inw;
		458	ih = inh;
		459	}
		460
		461	alpha = !!config.input.has_alpha;
		462
		463	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih);
		464	if (!RETVAL)
		465	goto err_iter;
		466
		467	config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
		468	config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
		469	config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
		470	config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
		471	config.output.is_external_memory = 1;
		472
		473	if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK)
		474	{
		475	g_object_unref (RETVAL);
		476	RETVAL = 0;
		477	goto err_iter;
		478	}
		479
		480	err_iter:
		481	WebPDemuxReleaseIterator (&iter);
		482	err_demux:
		483
		484	perlinterp_acquire ();
		485	#else
		486	croak ("load_webp: webp not enabled at compile time");
		487	#endif
		488	}
		489	OUTPUT:
		490	RETVAL
		491
		492	GdkPixbuf_noinc *
		493	decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		494	CODE:
		495	{
		496	struct jpeg_decompress_struct cinfo;
		497	struct jpg_err_mgr jerr;
		498	int rs;
		499	volatile GdkPixbuf *pb = 0;
		500	STRLEN data_len;
		501	guchar *data = SvPVbyte (image_data, data_len);
		502
		503	RETVAL = 0;
		504
		505	perlinterp_release ();
		506
		507	cinfo.err = jpeg_std_error (&jerr.err);
		508
		509	jerr.err.error_exit = cv_error_exit;
		510	jerr.err.output_message = cv_error_output;
		511
		512	if ((rs = setjmp (jerr.setjmp_buffer)))
		513	{
		514	jpeg_destroy_decompress (&cinfo);
		515
		516	if (pb)
		517	g_object_unref ((gpointer)pb);
		518
		519	perlinterp_acquire ();
		520	XSRETURN_UNDEF;
		521	}
		522
		523	jpeg_create_decompress (&cinfo);
		524	cv_jpeg_mem_src (&cinfo, data, data_len);
		525
		526	jpeg_read_header (&cinfo, TRUE);
		527
		528	cinfo.dct_method = JDCT_DEFAULT;
		529	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
		530	cinfo.do_block_smoothing = FALSE;
		531	cinfo.out_color_space = JCS_RGB;
		532	cinfo.quantize_colors = FALSE;
		533
		534	cinfo.scale_num = 1;
		535	cinfo.scale_denom = 1;
		536
		537	jpeg_calc_output_dimensions (&cinfo);
		538
		539	if (thumbnail)
		540	{
		541	cinfo.dct_method = JDCT_FASTEST;
		542	cinfo.do_fancy_upsampling = FALSE;
		543
		544	while (cinfo.scale_denom < 8
		545	&& cinfo.output_width >= iw*4
		546	&& cinfo.output_height >= ih*4)
		547	{
		548	cinfo.scale_denom <<= 1;
		549	jpeg_calc_output_dimensions (&cinfo);
		550	}
		551	}
		552
		553	if (cinfo.output_components != 3)
		554	longjmp (jerr.setjmp_buffer, 3);
		555
		556	if (cinfo.jpeg_color_space == JCS_YCCK \|\| cinfo.jpeg_color_space == JCS_CMYK)
		557	{
		558	cinfo.out_color_space = JCS_CMYK;
		559	cinfo.output_components = 4;
		560	}
		561
		562	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
		563	if (!RETVAL)
		564	longjmp (jerr.setjmp_buffer, 2);
		565
		566	data = gdk_pixbuf_get_pixels (RETVAL);
		567	rs = gdk_pixbuf_get_rowstride (RETVAL);
		568
		569	jpeg_start_decompress (&cinfo);
		570
		571	while (cinfo.output_scanline < cinfo.output_height)
		572	{
		573	int remaining = cinfo.output_height - cinfo.output_scanline;
		574	JSAMPROW rp[4];
		575
		576	rp [0] = data + cinfo.output_scanline * rs;
		577	rp [1] = (guchar *)rp [0] + rs;
		578	rp [2] = (guchar *)rp [1] + rs;
		579	rp [3] = (guchar *)rp [2] + rs;
		580
		581	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
		582	}
		583
		584	if (cinfo.out_color_space == JCS_CMYK)
		585	{
		586	guchar end = data + cinfo.output_height rs;
		587
		588	while (data < end)
		589	{
		590	U32 c = data [0];
		591	U32 m = data [1];
		592	U32 y = data [2];
		593	U32 k = data [3];
		594
		595	if (0)
		596	if (cinfo.Adobe_transform == 2)
		597	{
		598	c ^= 0xff;
		599	m ^= 0xff;
		600	y ^= 0xff;
		601	k ^= 0xff;
		602	}
		603
		604	data [0] = (c * k + 0x80) / 0xff;
		605	data [1] = (m * k + 0x80) / 0xff;
		606	data [2] = (y * k + 0x80) / 0xff;
		607	data [3] = 0xff;
		608
		609	data += 4;
		610	}
		611	}
		612
		613	jpeg_finish_decompress (&cinfo);
		614	jpeg_destroy_decompress (&cinfo);
		615	perlinterp_acquire ();
		616	}
		617	OUTPUT:
		618	RETVAL
		619
		620	void
		621	compare (GdkPixbuf a, GdkPixbuf b)
		622	PPCODE:
		623	perlinterp_release ();
		624	{
		625	int w = gdk_pixbuf_get_width (a);
		626	int h = gdk_pixbuf_get_height (a);
		627
		628	int sa = gdk_pixbuf_get_rowstride (a);
		629	int sb = gdk_pixbuf_get_rowstride (b);
		630
		631	guchar *pa = gdk_pixbuf_get_pixels (a);
		632	guchar *pb = gdk_pixbuf_get_pixels (b);
		633
		634	int x, y;
		635
		636	assert (w == gdk_pixbuf_get_width (b));
		637	assert (h == gdk_pixbuf_get_height (b));
		638
		639	assert (gdk_pixbuf_get_n_channels (a) == 3);
		640	assert (gdk_pixbuf_get_n_channels (b) == 3);
		641
		642	double diff = 0.;
		643	int peak = 0;
		644
		645	if (w && h)
		646	for (y = 0; y < h; y++)
		647	{
		648	guchar pa_ = pa + y sa;
		649	guchar pb_ = pb + y sb;
		650
		651	for (x = 0; x < w; x++)
		652	{
		653	int d;
		654
		655	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		656	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		657	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		658	}
		659	}
		660
		661	perlinterp_acquire ();
		662
		663	EXTEND (SP, 2);
		664	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		665	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		666	}
		667
		668	#############################################################################
		669
120	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	670	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
121		671
		672	# currently only works for filenames (octet strings)
		673
		674	SV *
		675	foldcase (SV *pathsv)
		676	PROTOTYPE: $
		677	CODE:
		678	{
		679	STRLEN plen;
		680	U8 path = (U8 )SvPV (pathsv, plen);
		681	U8 *pend = path + plen;
		682	U8 dst [plen * 6 * 3], *dstp = dst;
		683
		684	while (path < pend)
		685	{
		686	U8 ch = *path;
		687
		688	if (ch >= 'a' && ch <= 'z')
		689	dstp++ = path++;
		690	else if (ch >= 'A' && ch <= 'Z')
		691	dstp++ = path++ + ('a' - 'A');
		692	else if (ch >= '0' && ch <= '9')
		693	{
		694	STRLEN el, nl = 0;
		695	while (path >= '0' && path <= '9' && path < pend)
		696	path++, nl++;
		697
		698	for (el = nl; el < 6; el++)
		699	*dstp++ = '0';
		700
		701	memcpy (dstp, path - nl, nl);
		702	dstp += nl;
		703	}
		704	else
		705	dstp++ = path++;
		706	#if 0
		707	else
		708	{
		709	STRLEN cl;
		710	to_utf8_fold (path, dstp, &cl);
		711	dstp += cl;
		712	path += is_utf8_char (path);
		713	}
		714	#endif
		715	}
		716
		717	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		718	}
		719	OUTPUT:
		720	RETVAL
		721
122	GdkPixbuf_noinc *	722	GdkPixbuf_noinc *
123	p7_to_pb (int w, int h, guchar *src)	723	p7_to_pb (int w, int h, SV *src_sv)
		724	PROTOTYPE: @
124	CODE:	725	CODE:
125	{	726	{
126	int x, y;	727	int x, y;
127	guchar dst, d;	728	guchar dst, d;
128	int dstr;	729	int dstr;
		730	guchar src = (guchar )SvPVbyte_nolen (src_sv);
129		731
130	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	732	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
131	dst = gdk_pixbuf_get_pixels (RETVAL);	733	dst = gdk_pixbuf_get_pixels (RETVAL);
132	dstr = gdk_pixbuf_get_rowstride (RETVAL);	734	dstr = gdk_pixbuf_get_rowstride (RETVAL);
133		735
…		…
142	}	744	}
143	}	745	}
144	OUTPUT:	746	OUTPUT:
145	RETVAL	747	RETVAL
146		748
		749	#############################################################################
		750
		751	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		752
		753	void
		754	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		755	CODE:
		756	{
		757	int w = gdk_pixbuf_get_width (pb);
		758	int h = gdk_pixbuf_get_height (pb);
		759	int x, y, i;
		760	guchar *dst;
		761	int bpp = gdk_pixbuf_get_n_channels (pb);
		762	guchar *src = gdk_pixbuf_get_pixels (pb);
		763	int sstr = gdk_pixbuf_get_rowstride (pb);
		764
		765	a85_init ();
		766
		767	for (y = 0; y < h; y++)
		768	for (x = 0; x < w; x++)
		769	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		770	a85_push (fp, src [x * bpp + y * sstr + i]);
		771
		772	a85_finish (fp);
		773	}
		774
		775	void
		776	dump_binary (PerlIO fp, GdkPixbuf pb)
		777	CODE:
		778	{
		779	int w = gdk_pixbuf_get_width (pb);
		780	int h = gdk_pixbuf_get_height (pb);
		781	int x, y, i;
		782	guchar *dst;
		783	int bpp = gdk_pixbuf_get_n_channels (pb);
		784	guchar *src = gdk_pixbuf_get_pixels (pb);
		785	int sstr = gdk_pixbuf_get_rowstride (pb);
		786
		787	for (y = 0; y < h; y++)
		788	for (x = 0; x < w; x++)
		789	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		790	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		791	}
		792
		793	#############################################################################
		794
		795	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		796
147	SV *	797	SV *
148	pb_to_p7 (GdkPixbuf *pb)	798	pb_to_hv84 (GdkPixbuf *pb)
149	CODE:	799	CODE:
150	{	800	{
151	int w = gdk_pixbuf_get_width (pb);	801	int w = gdk_pixbuf_get_width (pb);
152	int h = gdk_pixbuf_get_height (pb);	802	int h = gdk_pixbuf_get_height (pb);
153	int x, y;	803	int x, y;
154	guchar *dst;	804	guchar *dst;
155	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;	805	int bpp = gdk_pixbuf_get_n_channels (pb);
156	guchar *src = gdk_pixbuf_get_pixels (pb);	806	guchar *src = gdk_pixbuf_get_pixels (pb);
157	int sstr = gdk_pixbuf_get_rowstride (pb);	807	int sstr = gdk_pixbuf_get_rowstride (pb);
158	int Er[IW], Eg[IW], Eb[IW];
159	int seed = 77;
160		808
161	RETVAL = newSV (w * h);	809	RETVAL = newSV (6 * 8 * 12 / 8);
162	SvPOK_only (RETVAL);	810	SvPOK_only (RETVAL);
163	SvCUR_set (RETVAL, w * h);	811	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
164		812
165	dst = SvPVX (RETVAL);	813	dst = (guchar *)SvPVX (RETVAL);
166
167	memset (Er, 0, sizeof (int) * IW);
168	memset (Eg, 0, sizeof (int) * IW);
169	memset (Eb, 0, sizeof (int) * IW);
170		814
171	/* some primitive error distribution + random dithering */	815	/* some primitive error distribution + random dithering */
172		816
173	for (y = 0; y < h; y++)	817	for (y = 0; y < h; y++)
174	{	818	{
175	int er = 0, eg = 0, eb = 0;	819	guchar p = src + y sstr;
176		820
177	for (x = 0; x < w; x++)	821	for (x = 0; x < w; x += 2)
178	{	822	{
179	int r, g, b;	823	unsigned int r, g, b, h, s, v, H, V1, V2;
180	guchar p = src + x bpp + y * sstr;
181		824
182	r = ((p[0] + er + Er[x]) * 7 + 128) / 255;	825	if (bpp == 3)
183	g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;	826	r = p++, g = p++, b = *p++;
184	b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;	827	else if (bpp == 1)
		828	r = g = b = *p++;
		829	else
		830	abort ();
185		831
186	r = r > 7 ? 7 : r < 0 ? 0 : r;	832	rgb_to_hsv (r, g, b, &h, &s, &v);
187	g = g > 7 ? 7 : g < 0 ? 0 : g;
188	b = b > 3 ? 3 : b < 0 ? 0 : b;
189		833
190	er += p[0] - (r * 255 + 4) / 7;	834	H = (h * 15 / 255) << 4;
191	eg += p[1] - (g * 255 + 4) / 7;	835	V1 = v;
192	eb += p[2] - (b * 255 + 2) / 3;
193		836
194	Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;	837	if (bpp == 3)
195	Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;	838	r = p++, g = p++, b = *p++;
196	Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;	839	else if (bpp == 1)
		840	r = g = b = *p++;
		841	else
		842	abort ();
197		843
198	*dst++ = r << 5 \| g << 2 \| b;	844	rgb_to_hsv (r, g, b, &h, &s, &v);
		845
		846	H \|= h * 15 / 255;
		847	V2 = v;
		848
		849	*dst++ = H;
		850	*dst++ = V1;
		851	*dst++ = V2;
199	}	852	}
200	}	853	}
201	}	854	}
202	OUTPUT:	855	OUTPUT:
203	RETVAL	856	RETVAL
204		857
		858	SV *
		859	hv84_to_av (unsigned char *hv84)
		860	CODE:
		861	{
		862	int i = 72 / 3;
		863	AV *av = newAV ();
		864
		865	RETVAL = (SV )newRV_noinc ((SV )av);
		866	while (i--)
		867	{
		868	int h = *hv84++;
		869	int v1 = *hv84++;
		870	int v2 = *hv84++;
		871
		872	av_push (av, newSViv (v1));
		873	av_push (av, newSViv ((h >> 4) * 255 / 15));
		874	av_push (av, newSViv (v2));
		875	av_push (av, newSViv ((h & 15) * 255 / 15));
		876	}
		877	}
		878	OUTPUT:
		879	RETVAL
		880
		881	#############################################################################
		882
205	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript	883	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
206		884
207	void	885	SV *
208	dump_pb (PerlIO fp, GdkPixbuf pb)	886	extract_features (SV *ar)
209	CODE:	887	CODE:
210	{	888	{
211	int w = gdk_pixbuf_get_width (pb);	889	int i;
212	int h = gdk_pixbuf_get_height (pb);	890	AV av, result;
213	int x, y, i;
214	guchar *dst;
215	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;
216	guchar *src = gdk_pixbuf_get_pixels (pb);
217	int sstr = gdk_pixbuf_get_rowstride (pb);
218		891
219	a85_init ();	892	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		893	croak ("Not an array ref as first argument to extract_features");
220		894
221	for (y = 0; y < h; y++)	895	av = (AV *) SvRV (ar);
222	for (x = 0; x < w; x++)	896	result = newAV ();
223	for (i = 0; i < 3; i++)
224	a85_push (fp, src [x * bpp + y * sstr + i]);
225		897
226	a85_finish (fp);	898	for (i = 0; i <= av_len (av); ++i)
227	}	899	{
		900	SV sv = av_fetch (av, i, 1);
		901	SV histsv = newSV (9 sizeof (float) + 1);
228		902
		903	SvPOK_on (histsv);
		904	SvCUR_set (histsv, 9 * sizeof (float));
		905	float hist = (float )SvPVX (histsv);
229		906
		907	struct feature f_h, f_s, f_v;
		908	feature_init (&f_h);
		909	feature_init (&f_s);
		910	feature_init (&f_v);
230		911
		912	{
		913	STRLEN len;
		914	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		915	while (len >= 3)
		916	{
		917	unsigned int r, g, b, h, s, v;
		918	r = buf++; g = buf++; b = *buf++;
		919	rgb_to_hsv (r, g, b, &h, &s, &v);
231		920
		921	feature_update_pass_1 (&f_h, h);
		922	feature_update_pass_1 (&f_s, s);
		923	feature_update_pass_1 (&f_v, v);
		924
		925	len -= 3;
		926	}
		927
		928	feature_finish_pass_1 (&f_h);
		929	feature_finish_pass_1 (&f_s);
		930	feature_finish_pass_1 (&f_v);
		931	}
		932
		933	{
		934	STRLEN len;
		935	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		936	while (len >= 3)
		937	{
		938	unsigned int r, g, b, h, s, v;
		939	r = buf++; g = buf++; b = *buf++;
		940	rgb_to_hsv (r, g, b, &h, &s, &v);
		941
		942	feature_update_pass_2 (&f_h, h);
		943	feature_update_pass_2 (&f_s, s);
		944	feature_update_pass_2 (&f_v, v);
		945
		946	len -= 3;
		947	}
		948
		949	feature_finish_pass_2 (&f_h);
		950	feature_finish_pass_2 (&f_s);
		951	feature_finish_pass_2 (&f_v);
		952	}
		953
		954	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		955	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		956	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
		957
		958	av_push (result, histsv);
		959	}
		960
		961	RETVAL = newRV_noinc ((SV *)result);
		962	}
		963	OUTPUT:
		964	RETVAL
		965

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Comparing CV/CV.xs (file contents): Revision 1.5 by root, Sat Nov 8 22:18:50 2003 UTC vs. Revision 1.54 by root, Sat Dec 23 08:04:48 2017 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.5 by root, Sat Nov 8 22:18:50 2003 UTC vs.
Revision 1.54 by root, Sat Dec 23 08:04:48 2017 UTC