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

Comparing CV/CV.xs (file contents):
Revision 1.17 by root, Wed Jul 20 06:20:36 2005 UTC vs.
Revision 1.69 by root, Wed Jun 7 17:18:46 2023 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>
5	#include <setjmp.h>	6	#include <setjmp.h>
		7	#include <math.h>
		8
		9	#include <magic.h>
6		10
7	#include <jpeglib.h>	11	#include <jpeglib.h>
		12	#include <jerror.h>
		13
		14	#include <glib.h>
		15	#include <gtk/gtk.h>
		16	#include <gdk/gdkx.h>
8	#include <gdk-pixbuf/gdk-pixbuf.h>	17	#include <gdk-pixbuf/gdk-pixbuf.h>
9		18
10	#include <gperl.h>	19	#include <gperl.h>
11	#include <gtk2perl.h>	20	#include <gtk2perl.h>
12		21
		22	#include <assert.h>
		23
		24	#if WEBP
		25	#include <webp/demux.h>
		26	#include <webp/decode.h>
		27	#endif
		28
		29	#if JXL
		30	#include <jxl/decode.h>
		31	#include "jxl/thread_parallel_runner.h"
		32	#endif
		33
		34	#include "perlmulticore.h"
		35
13	#define IW 80 /* MUST match Schnauer.pm! */	36	#define IW 80 /* MUST match Schnauzer.pm! */
14	#define IH 60 /* MUST match Schnauer.pm! */	37	#define IH 60 /* MUST match Schnauzer.pm! */
15
16	#define RAND (seed = (seed + 7141) * 54773 % 134456)
17		38
18	#define LINELENGTH 240	39	#define LINELENGTH 240
19		40
20	#define ELLIPSIS "\xe2\x80\xa6"	41	#define ELLIPSIS "\xe2\x80\xa6"
		42
		43	typedef char *octet_string;
		44
		45	static magic_t magic_cookie[2]; /* !mime, mime */
21		46
22	struct jpg_err_mgr	47	struct jpg_err_mgr
23	{	48	{
24	struct jpeg_error_mgr err;	49	struct jpeg_error_mgr err;
25	jmp_buf setjmp_buffer;	50	jmp_buf setjmp_buffer;
26	};	51	};
27		52
28	static void	53	static void
29	cv_error_exit (j_common_ptr cinfo)	54	cv_error_exit (j_common_ptr cinfo)
30	{	55	{
		56	cinfo->err->output_message (cinfo);
31	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);	57	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
32	}	58	}
33		59
34	static void	60	static void
35	cv_error_output (j_common_ptr cinfo)	61	cv_error_output (j_common_ptr cinfo)
36	{	62	{
		63	char msg[JMSG_LENGTH_MAX];
		64
		65	cinfo->err->format_message (cinfo, msg);
		66
		67	fprintf (stderr, "JPEG decoding error: %s\n", msg);
37	return;	68	return;
38	}	69	}
39		70
40	static void	71	static void
41	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,	72	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
62		93
63	*h &= 255;	94	*h &= 255;
64	}	95	}
65	}	96	}
66		97
		98	struct feature {
		99	float v1, v2, v3; // mean, square, cube
		100	int n;
		101	};
		102
		103	static void
		104	feature_init (struct feature *f)
		105	{
		106	f->v1 = 0.;
		107	f->v2 = 0.;
		108	f->v3 = 0.;
		109	f->n = 0;
		110	}
		111
		112	// didn't find an algorithm to neatly do mean, variance and skew in one pass.
		113	// elmex ist schuld.
		114	static void
		115	feature_update_pass_1 (struct feature *f, unsigned int v)
		116	{
		117	f->v1 += v;
		118	f->n += 1;
		119	}
		120
		121	static void
		122	feature_finish_pass_1 (struct feature *f)
		123	{
		124	if (f->n < 1)
		125	return;
		126
		127	f->v1 /= f->n;
		128	}
		129
		130	static void
		131	feature_update_pass_2 (struct feature *f, unsigned int v)
		132	{
		133	float d = v - f->v1;
		134
		135	f->v2 += d * d;
		136	f->v3 += d * d * d;
		137	}
		138
		139	static void
		140	feature_finish_pass_2 (struct feature *f)
		141	{
		142	if (f->n < 1)
		143	return;
		144
		145	f->v2 /= f->n;
		146	f->v3 /= f->n;
		147
		148	f->v1 /= 255.;
		149	f->v2 /= 255. * 255.; f->v2 = sqrtf (f->v2);
		150	f->v3 /= 255. * 255. * 255.; f->v3 = powf (fabsf (f->v3), 1./3.);
		151	}
		152
67	static guint32 a85_val;	153	static guint32 a85_val;
68	static guint a85_cnt;	154	static guint a85_cnt;
69	static guchar a85_buf[LINELENGTH], *a85_ptr;	155	static guchar a85_buf[LINELENGTH], *a85_ptr;
70		156
71	static void	157	static void
…		…
83	if (!--a85_cnt)	169	if (!--a85_cnt)
84	{	170	{
85	a85_cnt = 4;	171	a85_cnt = 4;
86	if (a85_val)	172	if (a85_val)
87	{	173	{
88	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;	174	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
89	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;	175	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
90	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;	176	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
91	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;	177	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
92	a85_ptr[0] = (a85_val ) + 33;	178	a85_ptr[0] = (a85_val ) + 33;
93		179
94	a85_ptr += 5;	180	a85_ptr += 5;
95	}	181	}
…		…
118		204
119	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	205	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
120	}	206	}
121		207
122	/////////////////////////////////////////////////////////////////////////////	208	/////////////////////////////////////////////////////////////////////////////
		209	// memory source for libjpeg
		210
		211	static void cv_ms_init (j_decompress_ptr cinfo)
		212	{
		213	}
		214
		215	static void cv_ms_term (j_decompress_ptr cinfo)
		216	{
		217	}
		218
		219	static boolean cv_ms_fill (j_decompress_ptr cinfo)
		220	{
		221	// unexpected EOF, warn and generate fake EOI marker
		222
		223	WARNMS (cinfo, JWRN_JPEG_EOF);
		224
		225	struct jpeg_source_mgr src = (struct jpeg_source_mgr )cinfo->src;
		226
		227	static const JOCTET eoi[] = { 0xFF, JPEG_EOI };
		228
		229	src->next_input_byte = eoi;
		230	src->bytes_in_buffer = sizeof (eoi);
		231
		232	return TRUE;
		233	}
		234
		235	static void cv_ms_skip (j_decompress_ptr cinfo, long num_bytes)
		236	{
		237	struct jpeg_source_mgr src = (struct jpeg_source_mgr )cinfo->src;
		238
		239	src->next_input_byte += num_bytes;
		240	src->bytes_in_buffer -= num_bytes;
		241	}
		242
		243	static void cv_jpeg_mem_src (j_decompress_ptr cinfo, void *buf, size_t buflen)
		244	{
		245	struct jpeg_source_mgr *src;
		246
		247	if (!cinfo->src)
		248	cinfo->src = (struct jpeg_source_mgr *)
		249	(*cinfo->mem->alloc_small) (
		250	(j_common_ptr) cinfo, JPOOL_PERMANENT, sizeof (struct jpeg_source_mgr)
		251	);
		252
		253	src = (struct jpeg_source_mgr *)cinfo->src;
		254	src->init_source = cv_ms_init;
		255	src->fill_input_buffer = cv_ms_fill;
		256	src->skip_input_data = cv_ms_skip;
		257	src->resync_to_restart = jpeg_resync_to_restart;
		258	src->term_source = cv_ms_term;
		259	src->next_input_byte = (JOCTET *)buf;
		260	src->bytes_in_buffer = buflen;
		261	}
		262
		263	/////////////////////////////////////////////////////////////////////////////
		264
		265	/* great, the jpeg-xl reference implementaton requires us to parse bmff files */
		266
		267	struct bmff_box
		268	{
		269	char type[4];
		270	const uint8_t *ptr;
		271	size_t size;
		272	};
		273
		274	static int
		275	bmff_parse_box (struct bmff_box box, const uint8_t next_in, size_t avail_in)
		276	{
		277	if (*avail_in < 8)
		278	return 0;
		279
		280	box->size = ((*next_in)[0] << 24)
		281	\| ((*next_in)[1] << 16)
		282	\| ((*next_in)[2] << 8)
		283	\| ((*next_in)[3] );
		284
		285	if (box->size < 8)
		286	return 0;
		287
		288	if (*avail_in < box->size)
		289	return 0;
		290
		291	memcpy (box->type, *next_in + 4, 4);
		292	box->ptr = *next_in + 8;
		293
		294	*next_in += box->size;
		295	*avail_in -= box->size;
		296
		297	box->size -= 8;
		298
		299	return 1;
		300	}
		301
		302	/////////////////////////////////////////////////////////////////////////////
123		303
124	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	304	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
125		305
126	PROTOTYPES: ENABLE	306	PROTOTYPES: ENABLE
127		307
		308	void
		309	_exit (int code)
		310
		311	# calculate the common prefix length of two strings
		312	# missing function in perl. really :)
		313	int
		314	common_prefix_length (a, b)
		315	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
		316	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
		317	CODE:
		318	RETVAL = 0;
		319
		320	while (a == b && *a)
		321	{
		322	RETVAL += (*a & 0xc0) != 0x80;
		323	a++, b++;
		324	}
		325
		326	OUTPUT:
		327	RETVAL
		328
		329	const char *
		330	magic (SV *path_or_data)
		331	ALIAS:
		332	magic = 0
		333	magic_mime = 1
		334	magic_buffer = 2
		335	magic_buffer_mime = 3
		336	CODE:
		337	{
		338	STRLEN len;
		339	char *data = SvPVbyte (path_or_data, len);
		340
		341	if (!magic_cookie[0])
		342	{
		343	magic_cookie[0] = magic_open (MAGIC_SYMLINK);
		344	magic_cookie[1] = magic_open (MAGIC_SYMLINK \| MAGIC_MIME_TYPE);
		345	magic_load (magic_cookie[0], 0);
		346	magic_load (magic_cookie[1], 0);
		347	}
		348
		349	perlinterp_release ();
		350
		351	RETVAL = ix & 2
		352	? magic_buffer (magic_cookie[ix & 1], data, len)
		353	: magic_file (magic_cookie[ix & 1], data);
		354
		355	perlinterp_acquire ();
		356	}
		357	OUTPUT:
		358	RETVAL
		359
		360	# missing/broken in Gtk2 perl module
		361
		362	void
		363	gdk_window_clear_hints (GdkWindow *window)
		364	CODE:
		365	gdk_window_set_geometry_hints (window, 0, 0);
		366
		367	gboolean
		368	gdk_net_wm_supports (GdkAtom property)
		369	CODE:
		370	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
		371	RETVAL = gdk_net_wm_supports (property);
		372	#else
		373	RETVAL = 0;
		374	#endif
		375	OUTPUT:
		376	RETVAL
		377
128	GdkPixbuf_noinc *	378	GdkPixbuf_noinc *
129	transpose (GdkPixbuf *pb)	379	dealpha_expose (GdkPixbuf *pb)
130	CODE:	380	CODE:
		381	perlinterp_release ();
131	{	382	{
132	int w = gdk_pixbuf_get_width (pb);	383	int w = gdk_pixbuf_get_width (pb);
133	int h = gdk_pixbuf_get_height (pb);	384	int h = gdk_pixbuf_get_height (pb);
134	int bpp = gdk_pixbuf_get_n_channels (pb);	385	int bpp = gdk_pixbuf_get_n_channels (pb);
135	int x, y, i;	386	int x, y, i;
136	guchar src = gdk_pixbuf_get_pixels (pb), dst;	387	guchar src = gdk_pixbuf_get_pixels (pb), dst;
137	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	388	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
138		389
139	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	390	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
140		391
141	dst = gdk_pixbuf_get_pixels (RETVAL);	392	dst = gdk_pixbuf_get_pixels (RETVAL);
142	dstr = gdk_pixbuf_get_rowstride (RETVAL);	393	dstr = gdk_pixbuf_get_rowstride (RETVAL);
143		394
144	for (y = 0; y < h; y++)
145	for (x = 0; x < w; x++)	395	for (x = 0; x < w; x++)
		396	for (y = 0; y < h; y++)
146	for (i = 0; i < bpp; i++)	397	for (i = 0; i < 3; i++)
147	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];	398	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
148	}	399	}
		400	perlinterp_acquire ();
149	OUTPUT:	401	OUTPUT:
150	RETVAL	402	RETVAL
151		403
152	GdkPixbuf_noinc *	404	GdkPixbuf_noinc *
153	flop (GdkPixbuf *pb)	405	rotate (GdkPixbuf *pb, int angle)
154	CODE:	406	CODE:
155	{	407	perlinterp_release ();
156	int w = gdk_pixbuf_get_width (pb);	408	if (angle < 0)
157	int h = gdk_pixbuf_get_height (pb);	409	angle += 360;
158	int bpp = gdk_pixbuf_get_n_channels (pb);	410	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
159	int x, y, i;	411	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
160	guchar src = gdk_pixbuf_get_pixels (pb), dst;	412	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
161	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	413	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
162		414	: angle);
163	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	415	perlinterp_acquire ();
164
165	dst = gdk_pixbuf_get_pixels (RETVAL);
166	dstr = gdk_pixbuf_get_rowstride (RETVAL);
167
168	for (y = 0; y < h; y++)
169	for (x = 0; x < w; x++)
170	for (i = 0; i < bpp; i++)
171	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];
172	}
173	OUTPUT:	416	OUTPUT:
174	RETVAL	417	RETVAL
175		418
		419	const char *
		420	filetype (SV *image_data)
		421	CODE:
		422	{
		423	STRLEN data_len;
		424	U8 *data = SvPVbyte (image_data, data_len);
		425	static const unsigned char jxl_header[] = {
		426	0, 0, 0, 0x0c, 0x4a, 0x58, 0x4c, 0x20, 0x0d, 0xa, 0x87, 0x0a
		427	};
		428
		429	if (data_len >= 20
		430	&& data[0] == 0xff
		431	&& data[1] == 0xd8
		432	&& data[2] == 0xff)
		433	RETVAL = "image/jpeg";
		434	else if (data_len >= 12
		435	&& data[ 0] == (U8)'R'
		436	&& data[ 1] == (U8)'I'
		437	&& data[ 2] == (U8)'F'
		438	&& data[ 3] == (U8)'F'
		439	&& data[ 8] == (U8)'W'
		440	&& data[ 9] == (U8)'E'
		441	&& data[10] == (U8)'B'
		442	&& data[11] == (U8)'P')
		443	RETVAL = "image/webp";
		444	else if (data_len >= 16
		445	&& data[ 0] == 0x89
		446	&& data[ 1] == (U8)'P'
		447	&& data[ 2] == (U8)'N'
		448	&& data[ 3] == (U8)'G'
		449	&& data[ 4] == 0x0d
		450	&& data[ 5] == 0x0a
		451	&& data[ 6] == 0x1a
		452	&& data[ 7] == 0x0a)
		453	RETVAL = "image/png";
		454	else if (data_len >= sizeof (jxl_header) && memcmp (data, jxl_header, sizeof (jxl_header)) == 0)
		455	RETVAL = "image/jxl"; // todo: might want to use JxlSignatureCheck
		456	else if (data_len >= 2
		457	&& data[0] == 0xff
		458	&& data[1] == 0x0a)
		459	RETVAL = "image/jxl";
		460	else if (data_len >= 13
		461	&& data[0] == 'G'
		462	&& data[1] == 'I'
		463	&& data[2] == 'F'
		464	&& data[3] == '8'
		465	//&& (data[4] == '7' \|\| data[4] == '9')
		466	&& data[5] == 'a')
		467	{
		468	RETVAL = "image/gif";
		469
		470	// now see if its animated - we require the netscape application header for this
		471	int ofs = 13;
		472
		473	if (data[10] & 0x80)
		474	ofs += (1 << ((data[10] & 7) + 1)) * 3;
		475
		476	if (data_len >= ofs + 2 + 1 + 11)
		477	{
		478
		479	// skip a graphic control extension block. we assume
		480	// there is at most one such block - while the NAB
		481	// has to come firstz, some files do not obey this
		482	if (data[ofs] == 0x21 && data[ofs + 1] == 0xf9)
		483	ofs += 3 + data[ofs + 2] + 1;
		484
		485	if (data_len >= ofs + 2 + 1 + 11)
		486	if (!memcmp (data + ofs, "\x21\xff\x0bNETSCAPE2.0", sizeof ("\x21\xff\x0bNETSCAPE2.0") - 1))
		487	RETVAL = "video/gif";
		488	}
		489	}
		490	else if (data_len >= 0x8000 + 6
		491	&& data[0x8000+1] == (U8)'B'
		492	&& data[0x8000+2] == (U8)'E'
		493	&& data[0x8000+3] == (U8)'A'
		494	&& data[0x8000+4] == (U8)'0'
		495	&& data[0x8000+5] == (U8)'1')
		496	RETVAL = "video/iso-bluray";
		497	else if (data_len >= 0x8000 + 6
		498	&& data[0x8000+1] == (U8)'C'
		499	&& data[0x8000+2] == (U8)'D'
		500	&& data[0x8000+3] == (U8)'0'
		501	&& data[0x8000+4] == (U8)'0'
		502	&& data[0x8000+5] == (U8)'1')
		503	RETVAL = "video/iso9660";
		504
		505	else
		506	XSRETURN_UNDEF;
		507	}
		508	OUTPUT:
		509	RETVAL
		510
176	GdkPixbuf_noinc *	511	GdkPixbuf_noinc *
177	load_jpeg (char *path, int thumbnail=0)	512	decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		513	CODE:
		514	{
		515	#if WEBP
		516	STRLEN data_size;
		517	int alpha;
		518	WebPData data;
		519	WebPDemuxer *demux;
		520	WebPIterator iter;
		521	WebPDecoderConfig config;
		522	int inw, inh;
		523
		524	data.bytes = (uint8_t *)SvPVbyte (image_data, data_size);
		525	data.size = data_size;
		526
		527	perlinterp_release ();
		528
		529	RETVAL = 0;
		530
		531	if (!(demux = WebPDemux (&data)))
		532	goto err_demux;
		533
		534	if (!WebPDemuxGetFrame (demux, 1, &iter))
		535	goto err_iter;
		536
		537	if (!WebPInitDecoderConfig (&config))
		538	goto err_iter;
		539
		540	config.options.use_threads = 1;
		541
		542	if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK)
		543	goto err_iter;
		544
		545	inw = config.input.width;
		546	inh = config.input.height;
		547
		548	if (thumbnail)
		549	{
		550	if (inw * ih > inh * iw)
		551	ih = (iw * inh + inw - 1) / inw;
		552	else
		553	iw = (ih * inw + inh - 1) / inh;
		554
		555	config.options.bypass_filtering = 1;
		556	config.options.no_fancy_upsampling = 1;
		557
		558	config.options.use_scaling = 1;
		559	config.options.scaled_width = iw;
		560	config.options.scaled_height = ih;
		561	}
		562	else
		563	{
		564	iw = inw;
		565	ih = inh;
		566	}
		567
		568	alpha = !!config.input.has_alpha;
		569
		570	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih);
		571	if (!RETVAL)
		572	goto err_iter;
		573
		574	config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
		575	config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
		576	config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
		577	config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
		578	config.output.is_external_memory = 1;
		579
		580	if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK)
		581	{
		582	g_object_unref (RETVAL);
		583	RETVAL = 0;
		584	goto err_iter;
		585	}
		586
		587	err_iter:
		588	WebPDemuxReleaseIterator (&iter);
		589	err_demux:
		590	WebPDemuxDelete (demux);
		591
		592	perlinterp_acquire ();
		593	#else
		594	croak ("load_webp: webp not enabled at compile time");
		595	#endif
		596	}
		597	OUTPUT:
		598	RETVAL
		599
		600	GdkPixbuf_noinc *
		601	decode_jxl (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		602	CODE:
		603	{
		604	#if JXL
		605	JxlDecoder *dec;
		606	JxlBasicInfo info;
		607	const uint8_t next_in = (uint8_t )SvPVbyte_nolen (image_data);
		608	size_t avail_in = SvCUR (image_data);
		609	const char *error = 0;
		610	JxlDecoderStatus status;
		611	static void *runner_cache;
		612	void *runner = 0;
		613
		614	RETVAL = 0;
		615
		616	if (runner_cache)
		617	runner = runner_cache;
		618	else
		619	runner = JxlThreadParallelRunnerCreate (0, JxlThreadParallelRunnerDefaultNumWorkerThreads ());
		620
		621	runner_cache = 0;
		622
		623	perlinterp_release ();
		624
		625	dec = JxlDecoderCreate (0);
		626
		627	error = "JxlDecoderCreate failed";
		628	if (!dec)
		629	goto done;
		630
		631	status = JxlDecoderSetParallelRunner (dec, JxlThreadParallelRunner, runner);
		632	error = "JxlDecoderSetParallelRunner failed";
		633	if (status != JXL_DEC_SUCCESS)
		634	goto done;
		635
		636	error = "JxlDecoderSubscribeEvents failed";
		637	status = JxlDecoderSubscribeEvents (dec, JXL_DEC_BASIC_INFO \| JXL_DEC_FULL_IMAGE);
		638	if (status != JXL_DEC_SUCCESS)
		639	goto done;
		640
		641	status = JxlDecoderSetInput (dec, next_in, avail_in);
		642	error = "JxlDecoderSetInput failed";
		643	if (status != JXL_DEC_SUCCESS)
		644	goto done;
		645
		646	for (;;)
		647	{
		648	status = JxlDecoderProcessInput (dec);
		649
		650	switch (status)
		651	{
		652	case JXL_DEC_FULL_IMAGE:
		653	error = 0;
		654	goto done;
		655
		656	case JXL_DEC_ERROR:
		657	error = "JxlDecoderProcessInput failed";
		658	goto done;
		659
		660	case JXL_DEC_NEED_MORE_INPUT:
		661	error = "incomplete file";
		662	goto done;
		663
		664	case JXL_DEC_SUCCESS:
		665	error = "incomplete decode";
		666	goto done;
		667
		668	case JXL_DEC_BASIC_INFO:
		669	{
		670	status = JxlDecoderGetBasicInfo (dec, &info);
		671	error = "JxlDecoderGetBasicInfo failed";
		672	if (status != JXL_DEC_SUCCESS)
		673	goto done;
		674
		675	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!info.alpha_bits, 8, info.xsize, info.ysize);
		676	error = "unable to allocate pixbuf";
		677	if (!RETVAL)
		678	goto done;
		679
		680	JxlPixelFormat format = {
		681	info.alpha_bits ? 4 : 3,
		682	JXL_TYPE_UINT8,
		683	JXL_NATIVE_ENDIAN,
		684	gdk_pixbuf_get_rowstride (RETVAL)
		685	};
		686
		687	// cannot use gdk_pixbuf_get_byte_length because that does
		688	// not return the size of the buffer, but the size of the buffer without
		689	// the last padding bytes. the internal buffer is rowstride * ysize,
		690	// and this is what the jxl decoder needs. none of this is documented
		691	// in either library, of course.
		692
		693	status = JxlDecoderSetImageOutBuffer (
		694	dec,
		695	&format,
		696	gdk_pixbuf_get_pixels (RETVAL),
		697	gdk_pixbuf_get_rowstride (RETVAL) * info.ysize
		698	);
		699	error = "JxlDecoderSetImageOutBuffer failed";
		700	if (status != JXL_DEC_SUCCESS)
		701	goto done;
		702	}
		703	break;
		704
		705	default:
		706	error = "unexpected event";
		707	goto done;
		708	}
		709	}
		710
		711	done:
		712	if (dec)
		713	JxlDecoderDestroy (dec);
		714
		715	perlinterp_acquire ();
		716
		717	if (runner_cache)
		718	JxlThreadParallelRunnerDestroy (runner);
		719
		720	runner_cache = runner;
		721
		722	if (error)
		723	{
		724	if (RETVAL)
		725	g_object_unref (RETVAL);
		726
		727	croak ("load_jxl: %s (status %d)", error, status);
		728	}
		729	#else
		730	croak ("load_jxl: jpeg-xl not enabled at compile time");
		731	#endif
		732	}
		733	OUTPUT:
		734	RETVAL
		735
		736	GdkPixbuf_noinc *
		737	decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
178	CODE:	738	CODE:
179	{	739	{
180	struct jpeg_decompress_struct cinfo;	740	struct jpeg_decompress_struct cinfo;
181	struct jpg_err_mgr jerr;	741	struct jpg_err_mgr jerr;
182	guchar *data;
183	int rs;	742	int rs;
184	FILE *fp;
185	volatile GdkPixbuf *pb = 0;	743	volatile GdkPixbuf *pb = 0;
		744	STRLEN data_len;
		745	guchar *data = SvPVbyte (image_data, data_len);
		746
186	RETVAL = 0;	747	RETVAL = 0;
187		748
188	if (!(fp = fopen (path, "rb")))	749	perlinterp_release ();
189	XSRETURN_UNDEF;
190		750
191	cinfo.err = jpeg_std_error (&jerr.err);	751	cinfo.err = jpeg_std_error (&jerr.err);
192		752
193	jerr.err.error_exit = cv_error_exit;	753	jerr.err.error_exit = cv_error_exit;
194	jerr.err.output_message = cv_error_output;	754	jerr.err.output_message = cv_error_output;
195		755
196	if ((rs = setjmp (jerr.setjmp_buffer)))	756	if ((rs = setjmp (jerr.setjmp_buffer)))
197	{	757	{
198	fclose (fp);
199	jpeg_destroy_decompress (&cinfo);	758	jpeg_destroy_decompress (&cinfo);
200		759
201	if (pb)	760	if (pb)
202	g_object_unref ((gpointer)pb);	761	g_object_unref ((gpointer)pb);
203		762
		763	perlinterp_acquire ();
204	XSRETURN_UNDEF;	764	XSRETURN_UNDEF;
205	}	765	}
206		766
		767	if (!data_len)
		768	longjmp (jerr.setjmp_buffer, 4);
		769
207	jpeg_create_decompress (&cinfo);	770	jpeg_create_decompress (&cinfo);
		771	cv_jpeg_mem_src (&cinfo, data, data_len);
208		772
209	jpeg_stdio_src (&cinfo, fp);
210	jpeg_read_header (&cinfo, TRUE);	773	jpeg_read_header (&cinfo, TRUE);
211		774
212	cinfo.dct_method = JDCT_DEFAULT;	775	cinfo.dct_method = JDCT_DEFAULT;
213	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */	776	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
214	cinfo.do_block_smoothing = FALSE;	777	cinfo.do_block_smoothing = FALSE;
…		…
224	{	787	{
225	cinfo.dct_method = JDCT_FASTEST;	788	cinfo.dct_method = JDCT_FASTEST;
226	cinfo.do_fancy_upsampling = FALSE;	789	cinfo.do_fancy_upsampling = FALSE;
227		790
228	while (cinfo.scale_denom < 8	791	while (cinfo.scale_denom < 8
229	&& (cinfo.output_width >> 1) >= IW	792	&& cinfo.output_width >= iw*4
230	&& (cinfo.output_height >> 1) >= IH)	793	&& cinfo.output_height >= ih*4)
231	{	794	{
232	cinfo.scale_denom <<= 1;	795	cinfo.scale_denom <<= 1;
233	jpeg_calc_output_dimensions (&cinfo);	796	jpeg_calc_output_dimensions (&cinfo);
234	}	797	}
235	}	798	}
236		799
		800	if (cinfo.output_components != 3)
		801	longjmp (jerr.setjmp_buffer, 3);
		802
		803	if (cinfo.jpeg_color_space == JCS_YCCK \|\| cinfo.jpeg_color_space == JCS_CMYK)
		804	{
		805	cinfo.out_color_space = JCS_CMYK;
		806	cinfo.output_components = 4;
		807	}
		808
237	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);	809	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
238	if (!RETVAL)	810	if (!RETVAL)
239	longjmp (jerr.setjmp_buffer, 2);	811	longjmp (jerr.setjmp_buffer, 2);
240		812
241	data = gdk_pixbuf_get_pixels (RETVAL);	813	data = gdk_pixbuf_get_pixels (RETVAL);
242	rs = gdk_pixbuf_get_rowstride (RETVAL);	814	rs = gdk_pixbuf_get_rowstride (RETVAL);
243
244	if (cinfo.output_components != 3)
245	longjmp (jerr.setjmp_buffer, 3);
246		815
247	jpeg_start_decompress (&cinfo);	816	jpeg_start_decompress (&cinfo);
248		817
249	while (cinfo.output_scanline < cinfo.output_height)	818	while (cinfo.output_scanline < cinfo.output_height)
250	{	819	{
…		…
257	rp [3] = (guchar *)rp [2] + rs;	826	rp [3] = (guchar *)rp [2] + rs;
258		827
259	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);	828	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
260	}	829	}
261		830
		831	if (cinfo.out_color_space == JCS_CMYK)
		832	{
		833	guchar end = data + cinfo.output_height rs;
		834
		835	while (data < end)
		836	{
		837	U32 c = data [0];
		838	U32 m = data [1];
		839	U32 y = data [2];
		840	U32 k = data [3];
		841
		842	if (0)
		843	if (cinfo.Adobe_transform == 2)
		844	{
		845	c ^= 0xff;
		846	m ^= 0xff;
		847	y ^= 0xff;
		848	k ^= 0xff;
		849	}
		850
		851	data [0] = (c * k + 0x80) / 0xff;
		852	data [1] = (m * k + 0x80) / 0xff;
		853	data [2] = (y * k + 0x80) / 0xff;
		854	data [3] = 0xff;
		855
		856	data += 4;
		857	}
		858	}
		859
262	jpeg_finish_decompress (&cinfo);	860	jpeg_finish_decompress (&cinfo);
263	fclose (fp);
264	jpeg_destroy_decompress (&cinfo);	861	jpeg_destroy_decompress (&cinfo);
		862	perlinterp_acquire ();
265	}	863	}
266	OUTPUT:	864	OUTPUT:
267	RETVAL	865	RETVAL
268		866
		867	void
		868	compare (GdkPixbuf a, GdkPixbuf b)
		869	PPCODE:
		870	perlinterp_release ();
		871	{
		872	int w = gdk_pixbuf_get_width (a);
		873	int h = gdk_pixbuf_get_height (a);
		874
		875	int sa = gdk_pixbuf_get_rowstride (a);
		876	int sb = gdk_pixbuf_get_rowstride (b);
		877
		878	guchar *pa = gdk_pixbuf_get_pixels (a);
		879	guchar *pb = gdk_pixbuf_get_pixels (b);
		880
		881	int x, y;
		882
		883	assert (w == gdk_pixbuf_get_width (b));
		884	assert (h == gdk_pixbuf_get_height (b));
		885
		886	assert (gdk_pixbuf_get_n_channels (a) == 3);
		887	assert (gdk_pixbuf_get_n_channels (b) == 3);
		888
		889	double diff = 0.;
		890	int peak = 0;
		891
		892	if (w && h)
		893	for (y = 0; y < h; y++)
		894	{
		895	guchar pa_ = pa + y sa;
		896	guchar pb_ = pb + y sb;
		897
		898	for (x = 0; x < w; x++)
		899	{
		900	int d;
		901
		902	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		903	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		904	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		905	}
		906	}
		907
		908	perlinterp_acquire ();
		909
		910	EXTEND (SP, 2);
		911	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		912	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		913	}
		914
269	#############################################################################	915	#############################################################################
270		916
271	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	917	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
272		918
		919	# currently only works for filenames (octet strings)
		920
		921	SV *
		922	foldcase (SV *pathsv)
		923	PROTOTYPE: $
		924	CODE:
		925	{
		926	STRLEN plen;
		927	U8 path = (U8 )SvPV (pathsv, plen);
		928	U8 *pend = path + plen;
		929	U8 dst [plen * 8 * 3], *dstp = dst;
		930
		931	while (path < pend)
		932	{
		933	U8 ch = *path;
		934
		935	if (ch >= 'a' && ch <= 'z')
		936	dstp++ = path++;
		937	else if (ch >= 'A' && ch <= 'Z')
		938	dstp++ = path++ + ('a' - 'A');
		939	else if (ch >= '0' && ch <= '9')
		940	{
		941	/* version sort, up to 8 digits */
		942	STRLEN el, nl = 0;
		943	while (path >= '0' && path <= '9' && path < pend)
		944	path++, nl++;
		945
		946	for (el = nl; el < 8; el++)
		947	*dstp++ = '0';
		948
		949	memcpy (dstp, path - nl, nl);
		950	dstp += nl;
		951	}
		952	else
		953	dstp++ = path++;
		954	#if 0
		955	else
		956	{
		957	STRLEN cl;
		958	to_utf8_fold (path, dstp, &cl);
		959	dstp += cl;
		960	path += is_utf8_char (path);
		961	}
		962	#endif
		963	}
		964
		965	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
		966	}
		967	OUTPUT:
		968	RETVAL
		969
273	GdkPixbuf_noinc *	970	GdkPixbuf_noinc *
274	p7_to_pb (int w, int h, guchar *src)	971	p7_to_pb (int w, int h, SV *src_sv)
		972	PROTOTYPE: @
275	CODE:	973	CODE:
276	{	974	{
277	int x, y;	975	int x, y;
278	guchar dst, d;	976	guchar dst, d;
279	int dstr;	977	int dstr;
		978	guchar src = (guchar )SvPVbyte_nolen (src_sv);
280		979
281	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	980	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
282	dst = gdk_pixbuf_get_pixels (RETVAL);	981	dst = gdk_pixbuf_get_pixels (RETVAL);
283	dstr = gdk_pixbuf_get_rowstride (RETVAL);	982	dstr = gdk_pixbuf_get_rowstride (RETVAL);
284		983
…		…
293	}	992	}
294	}	993	}
295	OUTPUT:	994	OUTPUT:
296	RETVAL	995	RETVAL
297		996
		997	#############################################################################
		998
		999	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		1000
		1001	void
		1002	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		1003	CODE:
		1004	{
		1005	int w = gdk_pixbuf_get_width (pb);
		1006	int h = gdk_pixbuf_get_height (pb);
		1007	int x, y, i;
		1008	guchar *dst;
		1009	int bpp = gdk_pixbuf_get_n_channels (pb);
		1010	guchar *src = gdk_pixbuf_get_pixels (pb);
		1011	int sstr = gdk_pixbuf_get_rowstride (pb);
		1012
		1013	a85_init ();
		1014
		1015	for (y = 0; y < h; y++)
		1016	for (x = 0; x < w; x++)
		1017	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		1018	a85_push (fp, src [x * bpp + y * sstr + i]);
		1019
		1020	a85_finish (fp);
		1021	}
		1022
		1023	void
		1024	dump_binary (PerlIO fp, GdkPixbuf pb)
		1025	CODE:
		1026	{
		1027	int w = gdk_pixbuf_get_width (pb);
		1028	int h = gdk_pixbuf_get_height (pb);
		1029	int x, y, i;
		1030	guchar *dst;
		1031	int bpp = gdk_pixbuf_get_n_channels (pb);
		1032	guchar *src = gdk_pixbuf_get_pixels (pb);
		1033	int sstr = gdk_pixbuf_get_rowstride (pb);
		1034
		1035	for (y = 0; y < h; y++)
		1036	for (x = 0; x < w; x++)
		1037	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		1038	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		1039	}
		1040
		1041	#############################################################################
		1042
		1043	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		1044
298	SV *	1045	SV *
299	pb_to_p7 (GdkPixbuf *pb)	1046	pb_to_hv84 (GdkPixbuf *pb)
300	CODE:	1047	CODE:
301	{	1048	{
302	int w = gdk_pixbuf_get_width (pb);	1049	int w = gdk_pixbuf_get_width (pb);
303	int h = gdk_pixbuf_get_height (pb);	1050	int h = gdk_pixbuf_get_height (pb);
304	int x, y;	1051	int x, y;
305	guchar *dst;	1052	guchar *dst;
306	int bpp = gdk_pixbuf_get_n_channels (pb);	1053	int bpp = gdk_pixbuf_get_n_channels (pb);
307	guchar *src = gdk_pixbuf_get_pixels (pb);	1054	guchar *src = gdk_pixbuf_get_pixels (pb);
308	int sstr = gdk_pixbuf_get_rowstride (pb);	1055	int sstr = gdk_pixbuf_get_rowstride (pb);
309	int Er[IW], Eg[IW], Eb[IW];
310	int seed = 77;
311
312	RETVAL = newSV (w * h);
313	SvPOK_only (RETVAL);
314	SvCUR_set (RETVAL, w * h);
315
316	dst = SvPVX (RETVAL);
317
318	memset (Er, 0, sizeof (int) * IW);
319	memset (Eg, 0, sizeof (int) * IW);
320	memset (Eb, 0, sizeof (int) * IW);
321
322	/* some primitive error distribution + random dithering */
323
324	for (y = 0; y < h; y++)
325	{
326	int er = 0, eg = 0, eb = 0;
327
328	for (x = 0; x < w; x++)
329	{
330	int r, g, b;
331	guchar p = src + x bpp + y * sstr;
332
333	r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
334	g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
335	b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
336
337	r = r > 7 ? 7 : r < 0 ? 0 : r;
338	g = g > 7 ? 7 : g < 0 ? 0 : g;
339	b = b > 3 ? 3 : b < 0 ? 0 : b;
340
341	er += p[0] - (r * 255 + 4) / 7;
342	eg += p[1] - (g * 255 + 4) / 7;
343	eb += p[2] - (b * 255 + 2) / 3;
344
345	Er[x] = er >> 1; er -= (er + 1) >> 1;
346	Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
347	Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
348
349	*dst++ = r << 5 \| g << 2 \| b;
350	}
351	}
352	}
353	OUTPUT:
354	RETVAL
355
356	SV *
357	make_histogram (SV *ar)
358	CODE:
359	{
360	int i;
361	AV av, result;
362
363	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
364	croak ("Not an array ref as first argument to make_histogram");
365
366	av = (AV *) SvRV (ar);
367	result = newAV ();
368
369	for (i = 0; i <= av_len (av); ++i)
370	{
371	const int HISTSIZE = 64;
372
373	int j;
374	SV sv = av_fetch (av, i, 1);
375	STRLEN len;
376	char *buf = SvPVbyte (sv, len);
377
378	int tmphist[HISTSIZE];
379	float *hist;
380
381	SV histsv = newSV (HISTSIZE sizeof (float) + 1);
382	SvPOK_on (histsv);
383	SvCUR_set (histsv, HISTSIZE * sizeof (float));
384	hist = (float *)SvPVX (histsv);
385
386	Zero (tmphist, sizeof (tmphist), char);
387
388	for (j = len; j--; )
389	{
390	unsigned int idx
391	= ((*buf & 0xc0) >> 2)
392	\| ((*buf & 0x18) >> 1)
393	\| (*buf & 0x03);
394
395	++tmphist[idx];
396	++buf;
397	}
398
399	for (j = 0; j < HISTSIZE; ++j)
400	hist[j] = (float)tmphist[j] / (len + 1e-30);
401
402	av_push (result, histsv);
403	}
404
405	RETVAL = newRV_noinc ((SV *)result);
406	}
407	OUTPUT:
408	RETVAL
409
410	#############################################################################
411
412	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
413
414	void
415	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
416	CODE:
417	{
418	int w = gdk_pixbuf_get_width (pb);
419	int h = gdk_pixbuf_get_height (pb);
420	int x, y, i;
421	guchar *dst;
422	int bpp = gdk_pixbuf_get_n_channels (pb);
423	guchar *src = gdk_pixbuf_get_pixels (pb);
424	int sstr = gdk_pixbuf_get_rowstride (pb);
425
426	a85_init ();
427
428	for (y = 0; y < h; y++)
429	for (x = 0; x < w; x++)
430	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
431	a85_push (fp, src [x * bpp + y * sstr + i]);
432
433	a85_finish (fp);
434	}
435
436	void
437	dump_binary (PerlIO fp, GdkPixbuf pb)
438	CODE:
439	{
440	int w = gdk_pixbuf_get_width (pb);
441	int h = gdk_pixbuf_get_height (pb);
442	int x, y, i;
443	guchar *dst;
444	int bpp = gdk_pixbuf_get_n_channels (pb);
445	guchar *src = gdk_pixbuf_get_pixels (pb);
446	int sstr = gdk_pixbuf_get_rowstride (pb);
447
448	for (y = 0; y < h; y++)
449	for (x = 0; x < w; x++)
450	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
451	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
452	}
453
454	#############################################################################
455
456	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
457
458	SV *
459	pb_to_hv84 (GdkPixbuf *pb)
460	CODE:
461	{
462	int w = gdk_pixbuf_get_width (pb);
463	int h = gdk_pixbuf_get_height (pb);
464	int x, y;
465	guchar *dst;
466	int bpp = gdk_pixbuf_get_n_channels (pb);
467	guchar *src = gdk_pixbuf_get_pixels (pb);
468	int sstr = gdk_pixbuf_get_rowstride (pb);
469		1056
470	RETVAL = newSV (6 * 8 * 12 / 8);	1057	RETVAL = newSV (6 * 8 * 12 / 8);
471	SvPOK_only (RETVAL);	1058	SvPOK_only (RETVAL);
472	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	1059	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
473		1060
474	dst = SvPVX (RETVAL);	1061	dst = (guchar *)SvPVX (RETVAL);
475		1062
476	/* some primitive error distribution + random dithering */	1063	/* some primitive error distribution + random dithering */
477		1064
478	for (y = 0; y < h; y++)	1065	for (y = 0; y < h; y++)
479	{	1066	{
…		…
537	}	1124	}
538	}	1125	}
539	OUTPUT:	1126	OUTPUT:
540	RETVAL	1127	RETVAL
541		1128
		1129	#############################################################################
542		1130
		1131	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
543		1132
		1133	SV *
		1134	extract_features (SV *ar)
		1135	CODE:
		1136	{
		1137	int i;
		1138	AV av, result;
		1139
		1140	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		1141	croak ("Not an array ref as first argument to extract_features");
		1142
		1143	av = (AV *) SvRV (ar);
		1144	result = newAV ();
		1145
		1146	for (i = 0; i <= av_len (av); ++i)
		1147	{
		1148	SV sv = av_fetch (av, i, 1);
		1149	SV histsv = newSV (9 sizeof (float) + 1);
		1150
		1151	SvPOK_on (histsv);
		1152	SvCUR_set (histsv, 9 * sizeof (float));
		1153	float hist = (float )SvPVX (histsv);
		1154
		1155	struct feature f_h, f_s, f_v;
		1156	feature_init (&f_h);
		1157	feature_init (&f_s);
		1158	feature_init (&f_v);
		1159
		1160	{
		1161	STRLEN len;
		1162	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		1163	while (len >= 3)
		1164	{
		1165	unsigned int r, g, b, h, s, v;
		1166	r = buf++; g = buf++; b = *buf++;
		1167	rgb_to_hsv (r, g, b, &h, &s, &v);
		1168
		1169	feature_update_pass_1 (&f_h, h);
		1170	feature_update_pass_1 (&f_s, s);
		1171	feature_update_pass_1 (&f_v, v);
		1172
		1173	len -= 3;
		1174	}
		1175
		1176	feature_finish_pass_1 (&f_h);
		1177	feature_finish_pass_1 (&f_s);
		1178	feature_finish_pass_1 (&f_v);
		1179	}
		1180
		1181	{
		1182	STRLEN len;
		1183	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		1184	while (len >= 3)
		1185	{
		1186	unsigned int r, g, b, h, s, v;
		1187	r = buf++; g = buf++; b = *buf++;
		1188	rgb_to_hsv (r, g, b, &h, &s, &v);
		1189
		1190	feature_update_pass_2 (&f_h, h);
		1191	feature_update_pass_2 (&f_s, s);
		1192	feature_update_pass_2 (&f_v, v);
		1193
		1194	len -= 3;
		1195	}
		1196
		1197	feature_finish_pass_2 (&f_h);
		1198	feature_finish_pass_2 (&f_s);
		1199	feature_finish_pass_2 (&f_v);
		1200	}
		1201
		1202	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		1203	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		1204	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
		1205
		1206	av_push (result, histsv);
		1207	}
		1208
		1209	RETVAL = newRV_noinc ((SV *)result);
		1210	}
		1211	OUTPUT:
		1212	RETVAL
		1213

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Comparing CV/CV.xs (file contents): Revision 1.17 by root, Wed Jul 20 06:20:36 2005 UTC vs. Revision 1.69 by root, Wed Jun 7 17:18:46 2023 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.17 by root, Wed Jul 20 06:20:36 2005 UTC vs.
Revision 1.69 by root, Wed Jun 7 17:18:46 2023 UTC