[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 1.56 by root, Wed Dec 27 17:48:16 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	// memory source for libjpeg
		207
		208	static void cv_ms_init (j_decompress_ptr cinfo)
		209	{
		210	}
		211
		212	static void cv_ms_term (j_decompress_ptr cinfo)
		213	{
		214	}
		215
		216	static boolean cv_ms_fill (j_decompress_ptr cinfo)
		217	{
		218	ERREXIT (cinfo, JERR_INPUT_EMPTY);
		219
		220	return TRUE;
		221	}
		222
		223	static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes)
		224	{
		225	if (num_bytes > 0)
		226	{
		227	struct jpeg_source_mgr src = (struct jpeg_source_mgr )cinfo->src;
		228
		229	src->next_input_byte += num_bytes;
		230	src->bytes_in_buffer -= num_bytes;
		231	}
		232	}
		233
		234	static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen)
		235	{
		236	struct jpeg_source_mgr *src;
		237
		238	if (!cinfo->src)
		239	cinfo->src = (struct jpeg_source_mgr *)
		240	(*cinfo->mem->alloc_small) (
		241	(j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)
		242	);
		243
		244	src = (struct jpeg_source_mgr *)cinfo->src;
		245	src->init_source = cv_ms_init;
		246	src->fill_input_buffer = cv_ms_fill;
		247	src->skip_input_data = cv_ms_skip;
		248	src->resync_to_restart = jpeg_resync_to_restart;
		249	src->term_source = cv_ms_term;
		250	src->next_input_byte = (JOCTET *)buf;
		251	src->bytes_in_buffer = buflen;
		252	}
		253
		254	/////////////////////////////////////////////////////////////////////////////
		255
68	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::ImageWindow	256	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
69		257
70	PROTOTYPES: ENABLE	258	PROTOTYPES: ENABLE
71		259
		260	# calculate the common prefix length of two strings
		261	# missing function in perl. really :)
		262	int
		263	common_prefix_length (a, b)
		264	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		265	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		266	CODE:
		267	RETVAL = 0;
		268
		269	while (a == b && *a)
		270	{
		271	RETVAL += (*a & 0xc0) != 0x80;
		272	a++, b++;
		273	}
		274
		275	OUTPUT:
		276	RETVAL
		277
		278	const char *
		279	magic (SV *path_or_data)
		280	ALIAS:
		281	magic = 0
		282	magic_mime = 1
		283	magic_buffer = 2
		284	magic_buffer_mime = 3
		285	CODE:
		286	{
		287	STRLEN len;
		288	char *data = SvPVbyte (path_or_data, len);
		289
		290	if (!magic_cookie[0])
		291	{
		292	magic_cookie[0] = magic_open (MAGIC_SYMLINK);
		293	magic_cookie[1] = magic_open (MAGIC_SYMLINK \| MAGIC_MIME_TYPE);
		294	magic_load (magic_cookie[0], 0);
		295	magic_load (magic_cookie[1], 0);
		296	}
		297
		298	perlinterp_release ();
		299
		300	RETVAL = ix & 2
		301	? magic_buffer (magic_cookie[ix & 1], data, len)
		302	: magic_file (magic_cookie[ix & 1], data);
		303
		304	perlinterp_acquire ();
		305	}
		306	OUTPUT:
		307	RETVAL
		308
		309	# missing/broken in Gtk2 perl module
		310
		311	void
		312	gdk_window_clear_hints (GdkWindow *window)
		313	CODE:
		314	gdk_window_set_geometry_hints (window, 0, 0);
		315
		316	gboolean
		317	gdk_net_wm_supports (GdkAtom property)
		318	CODE:
		319	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		320	RETVAL = gdk_net_wm_supports (property);
		321	#else
		322	RETVAL = 0;
		323	#endif
		324	OUTPUT:
		325	RETVAL
		326
72	GdkPixbuf_noinc *	327	GdkPixbuf_noinc *
73	transpose (GdkPixbuf *pb)	328	dealpha_expose (GdkPixbuf *pb)
74	CODE:	329	CODE:
		330	perlinterp_release ();
75	{	331	{
76	int w = gdk_pixbuf_get_width (pb);	332	int w = gdk_pixbuf_get_width (pb);
77	int h = gdk_pixbuf_get_height (pb);	333	int h = gdk_pixbuf_get_height (pb);
78	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;	334	int bpp = gdk_pixbuf_get_n_channels (pb);
79	int x, y, i;	335	int x, y, i;
80	guchar src = gdk_pixbuf_get_pixels (pb), dst;	336	guchar src = gdk_pixbuf_get_pixels (pb), dst;
81	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	337	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
82		338
83	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	339	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
84		340
85	dst = gdk_pixbuf_get_pixels (RETVAL);	341	dst = gdk_pixbuf_get_pixels (RETVAL);
86	dstr = gdk_pixbuf_get_rowstride (RETVAL);	342	dstr = gdk_pixbuf_get_rowstride (RETVAL);
87		343
88	for (y = 0; y < h; y++)
89	for (x = 0; x < w; x++)	344	for (x = 0; x < w; x++)
		345	for (y = 0; y < h; y++)
90	for (i = 0; i < bpp; i++)	346	for (i = 0; i < 3; i++)
91	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	347	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
92	}	348	}
		349	perlinterp_acquire ();
93	OUTPUT:	350	OUTPUT:
94	RETVAL	351	RETVAL
95		352
96	GdkPixbuf_noinc *	353	GdkPixbuf_noinc *
97	flop (GdkPixbuf *pb)	354	rotate (GdkPixbuf *pb, int angle)
98	CODE:	355	CODE:
99	{	356	perlinterp_release ();
100	int w = gdk_pixbuf_get_width (pb);	357	if (angle < 0)
101	int h = gdk_pixbuf_get_height (pb);	358	angle += 360;
102	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;	359	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
103	int x, y, i;	360	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
104	guchar src = gdk_pixbuf_get_pixels (pb), dst;	361	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
105	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	362	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
106		363	: angle);
107	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	364	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:	365	OUTPUT:
118	RETVAL	366	RETVAL
119		367
		368	const char *
		369	filetype (SV *image_data)
		370	CODE:
		371	{
		372	STRLEN data_len;
		373	U8 *data = SvPVbyte (image_data, data_len);
		374
		375	if (data_len >= 20
		376	&& data[0] == 0xff
		377	&& data[1] == 0xd8
		378	&& data[2] == 0xff)
		379	RETVAL = "jpg";
		380	else if (data_len >= 12
		381	&& data[ 0] == (U8)'R'
		382	&& data[ 1] == (U8)'I'
		383	&& data[ 2] == (U8)'F'
		384	&& data[ 3] == (U8)'F'
		385	&& data[ 8] == (U8)'W'
		386	&& data[ 9] == (U8)'E'
		387	&& data[10] == (U8)'B'
		388	&& data[11] == (U8)'P')
		389	RETVAL = "webp";
		390	else if (data_len >= 16
		391	&& data[ 0] == 0x89
		392	&& data[ 1] == (U8)'P'
		393	&& data[ 2] == (U8)'N'
		394	&& data[ 3] == (U8)'G'
		395	&& data[ 4] == 0x0d
		396	&& data[ 5] == 0x0a
		397	&& data[ 6] == 0x1a
		398	&& data[ 7] == 0x0a)
		399	RETVAL = "png";
		400	else
		401	RETVAL = "other";
		402	}
		403	OUTPUT:
		404	RETVAL
		405
		406	GdkPixbuf_noinc *
		407	decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		408	CODE:
		409	{
		410	#if WEBP
		411	STRLEN data_size;
		412	int alpha;
		413	WebPData data;
		414	WebPDemuxer *demux;
		415	WebPIterator iter;
		416	WebPDecoderConfig config;
		417	int inw, inh;
		418
		419	data.bytes = (uint8_t *)SvPVbyte (image_data, data_size);
		420	data.size = data_size;
		421
		422	perlinterp_release ();
		423
		424	RETVAL = 0;
		425
		426	if (!(demux = WebPDemux (&data)))
		427	goto err_demux;
		428
		429	if (!WebPDemuxGetFrame (demux, 1, &iter))
		430	goto err_iter;
		431
		432	if (!WebPInitDecoderConfig (&config))
		433	goto err_iter;
		434
		435	config.options.use_threads = 1;
		436
		437	if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK)
		438	goto err_iter;
		439
		440	inw = config.input.width;
		441	inh = config.input.height;
		442
		443	if (thumbnail)
		444	{
		445	if (inw * ih > inh * iw)
		446	ih = (iw * inh + inw - 1) / inw;
		447	else
		448	iw = (ih * inw + inh - 1) / inh;
		449
		450	config.options.bypass_filtering = 1;
		451	config.options.no_fancy_upsampling = 1;
		452
		453	config.options.use_scaling = 1;
		454	config.options.scaled_width = iw;
		455	config.options.scaled_height = ih;
		456	}
		457	else
		458	{
		459	iw = inw;
		460	ih = inh;
		461	}
		462
		463	alpha = !!config.input.has_alpha;
		464
		465	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih);
		466	if (!RETVAL)
		467	goto err_iter;
		468
		469	config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
		470	config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
		471	config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
		472	config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
		473	config.output.is_external_memory = 1;
		474
		475	if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK)
		476	{
		477	g_object_unref (RETVAL);
		478	RETVAL = 0;
		479	goto err_iter;
		480	}
		481
		482	err_iter:
		483	WebPDemuxReleaseIterator (&iter);
		484	err_demux:
		485	WebPDemuxDelete (demux);
		486
		487	perlinterp_acquire ();
		488	#else
		489	croak ("load_webp: webp not enabled at compile time");
		490	#endif
		491	}
		492	OUTPUT:
		493	RETVAL
		494
		495	GdkPixbuf_noinc *
		496	decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		497	CODE:
		498	{
		499	struct jpeg_decompress_struct cinfo;
		500	struct jpg_err_mgr jerr;
		501	int rs;
		502	volatile GdkPixbuf *pb = 0;
		503	STRLEN data_len;
		504	guchar *data = SvPVbyte (image_data, data_len);
		505
		506	RETVAL = 0;
		507
		508	perlinterp_release ();
		509
		510	cinfo.err = jpeg_std_error (&jerr.err);
		511
		512	jerr.err.error_exit = cv_error_exit;
		513	jerr.err.output_message = cv_error_output;
		514
		515	if ((rs = setjmp (jerr.setjmp_buffer)))
		516	{
		517	jpeg_destroy_decompress (&cinfo);
		518
		519	if (pb)
		520	g_object_unref ((gpointer)pb);
		521
		522	perlinterp_acquire ();
		523	XSRETURN_UNDEF;
		524	}
		525
		526	jpeg_create_decompress (&cinfo);
		527	cv_jpeg_mem_src (&cinfo, data, data_len);
		528
		529	jpeg_read_header (&cinfo, TRUE);
		530
		531	cinfo.dct_method = JDCT_DEFAULT;
		532	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
		533	cinfo.do_block_smoothing = FALSE;
		534	cinfo.out_color_space = JCS_RGB;
		535	cinfo.quantize_colors = FALSE;
		536
		537	cinfo.scale_num = 1;
		538	cinfo.scale_denom = 1;
		539
		540	jpeg_calc_output_dimensions (&cinfo);
		541
		542	if (thumbnail)
		543	{
		544	cinfo.dct_method = JDCT_FASTEST;
		545	cinfo.do_fancy_upsampling = FALSE;
		546
		547	while (cinfo.scale_denom < 8
		548	&& cinfo.output_width >= iw*4
		549	&& cinfo.output_height >= ih*4)
		550	{
		551	cinfo.scale_denom <<= 1;
		552	jpeg_calc_output_dimensions (&cinfo);
		553	}
		554	}
		555
		556	if (cinfo.output_components != 3)
		557	longjmp (jerr.setjmp_buffer, 3);
		558
		559	if (cinfo.jpeg_color_space == JCS_YCCK \|\| cinfo.jpeg_color_space == JCS_CMYK)
		560	{
		561	cinfo.out_color_space = JCS_CMYK;
		562	cinfo.output_components = 4;
		563	}
		564
		565	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
		566	if (!RETVAL)
		567	longjmp (jerr.setjmp_buffer, 2);
		568
		569	data = gdk_pixbuf_get_pixels (RETVAL);
		570	rs = gdk_pixbuf_get_rowstride (RETVAL);
		571
		572	jpeg_start_decompress (&cinfo);
		573
		574	while (cinfo.output_scanline < cinfo.output_height)
		575	{
		576	int remaining = cinfo.output_height - cinfo.output_scanline;
		577	JSAMPROW rp[4];
		578
		579	rp [0] = data + cinfo.output_scanline * rs;
		580	rp [1] = (guchar *)rp [0] + rs;
		581	rp [2] = (guchar *)rp [1] + rs;
		582	rp [3] = (guchar *)rp [2] + rs;
		583
		584	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
		585	}
		586
		587	if (cinfo.out_color_space == JCS_CMYK)
		588	{
		589	guchar end = data + cinfo.output_height rs;
		590
		591	while (data < end)
		592	{
		593	U32 c = data [0];
		594	U32 m = data [1];
		595	U32 y = data [2];
		596	U32 k = data [3];
		597
		598	if (0)
		599	if (cinfo.Adobe_transform == 2)
		600	{
		601	c ^= 0xff;
		602	m ^= 0xff;
		603	y ^= 0xff;
		604	k ^= 0xff;
		605	}
		606
		607	data [0] = (c * k + 0x80) / 0xff;
		608	data [1] = (m * k + 0x80) / 0xff;
		609	data [2] = (y * k + 0x80) / 0xff;
		610	data [3] = 0xff;
		611
		612	data += 4;
		613	}
		614	}
		615
		616	jpeg_finish_decompress (&cinfo);
		617	jpeg_destroy_decompress (&cinfo);
		618	perlinterp_acquire ();
		619	}
		620	OUTPUT:
		621	RETVAL
		622
		623	void
		624	compare (GdkPixbuf a, GdkPixbuf b)
		625	PPCODE:
		626	perlinterp_release ();
		627	{
		628	int w = gdk_pixbuf_get_width (a);
		629	int h = gdk_pixbuf_get_height (a);
		630
		631	int sa = gdk_pixbuf_get_rowstride (a);
		632	int sb = gdk_pixbuf_get_rowstride (b);
		633
		634	guchar *pa = gdk_pixbuf_get_pixels (a);
		635	guchar *pb = gdk_pixbuf_get_pixels (b);
		636
		637	int x, y;
		638
		639	assert (w == gdk_pixbuf_get_width (b));
		640	assert (h == gdk_pixbuf_get_height (b));
		641
		642	assert (gdk_pixbuf_get_n_channels (a) == 3);
		643	assert (gdk_pixbuf_get_n_channels (b) == 3);
		644
		645	double diff = 0.;
		646	int peak = 0;
		647
		648	if (w && h)
		649	for (y = 0; y < h; y++)
		650	{
		651	guchar pa_ = pa + y sa;
		652	guchar pb_ = pb + y sb;
		653
		654	for (x = 0; x < w; x++)
		655	{
		656	int d;
		657
		658	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		659	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		660	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		661	}
		662	}
		663
		664	perlinterp_acquire ();
		665
		666	EXTEND (SP, 2);
		667	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		668	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		669	}
		670
		671	#############################################################################
		672
120	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	673	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
121		674
		675	# currently only works for filenames (octet strings)
		676
		677	SV *
		678	foldcase (SV *pathsv)
		679	PROTOTYPE: $
		680	CODE:
		681	{
		682	STRLEN plen;
		683	U8 path = (U8 )SvPV (pathsv, plen);
		684	U8 *pend = path + plen;
		685	U8 dst [plen * 6 * 3], *dstp = dst;
		686
		687	while (path < pend)
		688	{
		689	U8 ch = *path;
		690
		691	if (ch >= 'a' && ch <= 'z')
		692	dstp++ = path++;
		693	else if (ch >= 'A' && ch <= 'Z')
		694	dstp++ = path++ + ('a' - 'A');
		695	else if (ch >= '0' && ch <= '9')
		696	{
		697	STRLEN el, nl = 0;
		698	while (path >= '0' && path <= '9' && path < pend)
		699	path++, nl++;
		700
		701	for (el = nl; el < 6; el++)
		702	*dstp++ = '0';
		703
		704	memcpy (dstp, path - nl, nl);
		705	dstp += nl;
		706	}
		707	else
		708	dstp++ = path++;
		709	#if 0
		710	else
		711	{
		712	STRLEN cl;
		713	to_utf8_fold (path, dstp, &cl);
		714	dstp += cl;
		715	path += is_utf8_char (path);
		716	}
		717	#endif
		718	}
		719
		720	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		721	}
		722	OUTPUT:
		723	RETVAL
		724
122	GdkPixbuf_noinc *	725	GdkPixbuf_noinc *
123	p7_to_pb (int w, int h, guchar *src)	726	p7_to_pb (int w, int h, SV *src_sv)
		727	PROTOTYPE: @
124	CODE:	728	CODE:
125	{	729	{
126	int x, y;	730	int x, y;
127	guchar dst, d;	731	guchar dst, d;
128	int dstr;	732	int dstr;
		733	guchar src = (guchar )SvPVbyte_nolen (src_sv);
129		734
130	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	735	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
131	dst = gdk_pixbuf_get_pixels (RETVAL);	736	dst = gdk_pixbuf_get_pixels (RETVAL);
132	dstr = gdk_pixbuf_get_rowstride (RETVAL);	737	dstr = gdk_pixbuf_get_rowstride (RETVAL);
133		738
…		…
142	}	747	}
143	}	748	}
144	OUTPUT:	749	OUTPUT:
145	RETVAL	750	RETVAL
146		751
		752	#############################################################################
		753
		754	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		755
		756	void
		757	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		758	CODE:
		759	{
		760	int w = gdk_pixbuf_get_width (pb);
		761	int h = gdk_pixbuf_get_height (pb);
		762	int x, y, i;
		763	guchar *dst;
		764	int bpp = gdk_pixbuf_get_n_channels (pb);
		765	guchar *src = gdk_pixbuf_get_pixels (pb);
		766	int sstr = gdk_pixbuf_get_rowstride (pb);
		767
		768	a85_init ();
		769
		770	for (y = 0; y < h; y++)
		771	for (x = 0; x < w; x++)
		772	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		773	a85_push (fp, src [x * bpp + y * sstr + i]);
		774
		775	a85_finish (fp);
		776	}
		777
		778	void
		779	dump_binary (PerlIO fp, GdkPixbuf pb)
		780	CODE:
		781	{
		782	int w = gdk_pixbuf_get_width (pb);
		783	int h = gdk_pixbuf_get_height (pb);
		784	int x, y, i;
		785	guchar *dst;
		786	int bpp = gdk_pixbuf_get_n_channels (pb);
		787	guchar *src = gdk_pixbuf_get_pixels (pb);
		788	int sstr = gdk_pixbuf_get_rowstride (pb);
		789
		790	for (y = 0; y < h; y++)
		791	for (x = 0; x < w; x++)
		792	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		793	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		794	}
		795
		796	#############################################################################
		797
		798	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		799
147	SV *	800	SV *
148	pb_to_p7 (GdkPixbuf *pb)	801	pb_to_hv84 (GdkPixbuf *pb)
149	CODE:	802	CODE:
150	{	803	{
151	int w = gdk_pixbuf_get_width (pb);	804	int w = gdk_pixbuf_get_width (pb);
152	int h = gdk_pixbuf_get_height (pb);	805	int h = gdk_pixbuf_get_height (pb);
153	int x, y;	806	int x, y;
154	guchar *dst;	807	guchar *dst;
155	int bpp = gdk_pixbuf_get_has_alpha (pb) ? 4 : 3;	808	int bpp = gdk_pixbuf_get_n_channels (pb);
156	guchar *src = gdk_pixbuf_get_pixels (pb);	809	guchar *src = gdk_pixbuf_get_pixels (pb);
157	int sstr = gdk_pixbuf_get_rowstride (pb);	810	int sstr = gdk_pixbuf_get_rowstride (pb);
158	int Er[IW], Eg[IW], Eb[IW];
159	int seed = 77;
160		811
161	RETVAL = newSV (w * h);	812	RETVAL = newSV (6 * 8 * 12 / 8);
162	SvPOK_only (RETVAL);	813	SvPOK_only (RETVAL);
163	SvCUR_set (RETVAL, w * h);	814	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
164		815
165	dst = SvPVX (RETVAL);	816	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		817
171	/* some primitive error distribution + random dithering */	818	/* some primitive error distribution + random dithering */
172		819
173	for (y = 0; y < h; y++)	820	for (y = 0; y < h; y++)
174	{	821	{
175	int er = 0, eg = 0, eb = 0;	822	guchar p = src + y sstr;
176		823
177	for (x = 0; x < w; x++)	824	for (x = 0; x < w; x += 2)
178	{	825	{
179	int r, g, b;	826	unsigned int r, g, b, h, s, v, H, V1, V2;
180	guchar p = src + x bpp + y * sstr;
181		827
182	r = ((p[0] + er + Er[x]) * 7 + 128) / 255;	828	if (bpp == 3)
183	g = ((p[1] + eg + Eg[x]) * 7 + 128) / 255;	829	r = p++, g = p++, b = *p++;
184	b = ((p[2] + eb + Eb[x]) * 3 + 128) / 255;	830	else if (bpp == 1)
		831	r = g = b = *p++;
		832	else
		833	abort ();
185		834
186	r = r > 7 ? 7 : r < 0 ? 0 : r;	835	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		836
190	er += p[0] - (r * 255 + 4) / 7;	837	H = (h * 15 / 255) << 4;
191	eg += p[1] - (g * 255 + 4) / 7;	838	V1 = v;
192	eb += p[2] - (b * 255 + 2) / 3;
193		839
194	Er[x] = er / 2; er -= er / 2 + RAND % 7 - 3;	840	if (bpp == 3)
195	Eg[x] = eg / 2; eg -= eg / 2 + RAND % 7 - 3;	841	r = p++, g = p++, b = *p++;
196	Eb[x] = eb / 2; eb -= eb / 2 + RAND % 7 - 3;	842	else if (bpp == 1)
		843	r = g = b = *p++;
		844	else
		845	abort ();
197		846
198	*dst++ = r << 5 \| g << 2 \| b;	847	rgb_to_hsv (r, g, b, &h, &s, &v);
		848
		849	H \|= h * 15 / 255;
		850	V2 = v;
		851
		852	*dst++ = H;
		853	*dst++ = V1;
		854	*dst++ = V2;
199	}	855	}
200	}	856	}
201	}	857	}
202	OUTPUT:	858	OUTPUT:
203	RETVAL	859	RETVAL
204		860
		861	SV *
		862	hv84_to_av (unsigned char *hv84)
		863	CODE:
		864	{
		865	int i = 72 / 3;
		866	AV *av = newAV ();
		867
		868	RETVAL = (SV )newRV_noinc ((SV )av);
		869	while (i--)
		870	{
		871	int h = *hv84++;
		872	int v1 = *hv84++;
		873	int v2 = *hv84++;
		874
		875	av_push (av, newSViv (v1));
		876	av_push (av, newSViv ((h >> 4) * 255 / 15));
		877	av_push (av, newSViv (v2));
		878	av_push (av, newSViv ((h & 15) * 255 / 15));
		879	}
		880	}
		881	OUTPUT:
		882	RETVAL
		883
		884	#############################################################################
		885
205	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript	886	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
206		887
207	void	888	SV *
208	dump_pb (PerlIO fp, GdkPixbuf pb)	889	extract_features (SV *ar)
209	CODE:	890	CODE:
210	{	891	{
211	int w = gdk_pixbuf_get_width (pb);	892	int i;
212	int h = gdk_pixbuf_get_height (pb);	893	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		894
219	a85_init ();	895	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		896	croak ("Not an array ref as first argument to extract_features");
220		897
221	for (y = 0; y < h; y++)	898	av = (AV *) SvRV (ar);
222	for (x = 0; x < w; x++)	899	result = newAV ();
223	for (i = 0; i < 3; i++)
224	a85_push (fp, src [x * bpp + y * sstr + i]);
225		900
226	a85_finish (fp);	901	for (i = 0; i <= av_len (av); ++i)
227	}	902	{
		903	SV sv = av_fetch (av, i, 1);
		904	SV histsv = newSV (9 sizeof (float) + 1);
228		905
		906	SvPOK_on (histsv);
		907	SvCUR_set (histsv, 9 * sizeof (float));
		908	float hist = (float )SvPVX (histsv);
229		909
		910	struct feature f_h, f_s, f_v;
		911	feature_init (&f_h);
		912	feature_init (&f_s);
		913	feature_init (&f_v);
230		914
		915	{
		916	STRLEN len;
		917	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		918	while (len >= 3)
		919	{
		920	unsigned int r, g, b, h, s, v;
		921	r = buf++; g = buf++; b = *buf++;
		922	rgb_to_hsv (r, g, b, &h, &s, &v);
231		923
		924	feature_update_pass_1 (&f_h, h);
		925	feature_update_pass_1 (&f_s, s);
		926	feature_update_pass_1 (&f_v, v);
		927
		928	len -= 3;
		929	}
		930
		931	feature_finish_pass_1 (&f_h);
		932	feature_finish_pass_1 (&f_s);
		933	feature_finish_pass_1 (&f_v);
		934	}
		935
		936	{
		937	STRLEN len;
		938	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		939	while (len >= 3)
		940	{
		941	unsigned int r, g, b, h, s, v;
		942	r = buf++; g = buf++; b = *buf++;
		943	rgb_to_hsv (r, g, b, &h, &s, &v);
		944
		945	feature_update_pass_2 (&f_h, h);
		946	feature_update_pass_2 (&f_s, s);
		947	feature_update_pass_2 (&f_v, v);
		948
		949	len -= 3;
		950	}
		951
		952	feature_finish_pass_2 (&f_h);
		953	feature_finish_pass_2 (&f_s);
		954	feature_finish_pass_2 (&f_v);
		955	}
		956
		957	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		958	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		959	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
		960
		961	av_push (result, histsv);
		962	}
		963
		964	RETVAL = newRV_noinc ((SV *)result);
		965	}
		966	OUTPUT:
		967	RETVAL
		968

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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 1.56 by root, Wed Dec 27 17:48:16 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 1.56 by root, Wed Dec 27 17:48:16 2017 UTC