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

Comparing CV/CV.xs (file contents):
Revision 1.27 by root, Sun Aug 21 02:23:52 2005 UTC vs.
Revision 1.70 by root, Thu Jun 8 15:42:03 2023 UTC

…		…
2	#include "perl.h"	2	#include "perl.h"
3	#include "XSUB.h"	3	#include "XSUB.h"
4		4
5	#include <string.h>	5	#include <string.h>
6	#include <setjmp.h>	6	#include <setjmp.h>
		7	#include <math.h>
		8
		9	#include <magic.h>
7		10
8	#include <jpeglib.h>	11	#include <jpeglib.h>
		12	#include <jerror.h>
		13
9	#include <glib.h>	14	#include <glib.h>
10	#include <gtk/gtk.h>	15	#include <gtk/gtk.h>
		16	#include <gdk/gdkx.h>
11	#include <gdk-pixbuf/gdk-pixbuf.h>	17	#include <gdk-pixbuf/gdk-pixbuf.h>
12		18
13	#include <gperl.h>	19	#include <gperl.h>
14	#include <gtk2perl.h>	20	#include <gtk2perl.h>
15		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
16	#define IW 80 /* MUST match Schnauer.pm! */	36	#define IW 80 /* MUST match Schnauzer.pm! */
17	#define IH 60 /* MUST match Schnauer.pm! */	37	#define IH 60 /* MUST match Schnauzer.pm! */
18
19	#define RAND (seed = (seed + 7141) * 54773 % 134456)
20		38
21	#define LINELENGTH 240	39	#define LINELENGTH 240
22		40
23	#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 */
24		46
25	struct jpg_err_mgr	47	struct jpg_err_mgr
26	{	48	{
27	struct jpeg_error_mgr err;	49	struct jpeg_error_mgr err;
28	jmp_buf setjmp_buffer;	50	jmp_buf setjmp_buffer;
29	};	51	};
30		52
31	static void	53	static void
32	cv_error_exit (j_common_ptr cinfo)	54	cv_error_exit (j_common_ptr cinfo)
33	{	55	{
		56	cinfo->err->output_message (cinfo);
34	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);	57	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
35	}	58	}
36		59
37	static void	60	static void
38	cv_error_output (j_common_ptr cinfo)	61	cv_error_output (j_common_ptr cinfo)
39	{	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);
40	return;	68	return;
41	}	69	}
42		70
43	static void	71	static void
44	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,
…		…
65		93
66	*h &= 255;	94	*h &= 255;
67	}	95	}
68	}	96	}
69		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
70	static guint32 a85_val;	153	static guint32 a85_val;
71	static guint a85_cnt;	154	static guint a85_cnt;
72	static guchar a85_buf[LINELENGTH], *a85_ptr;	155	static guchar a85_buf[LINELENGTH], *a85_ptr;
73		156
74	static void	157	static void
…		…
86	if (!--a85_cnt)	169	if (!--a85_cnt)
87	{	170	{
88	a85_cnt = 4;	171	a85_cnt = 4;
89	if (a85_val)	172	if (a85_val)
90	{	173	{
91	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;	174	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
92	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;	175	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
93	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;	176	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
94	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;	177	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
95	a85_ptr[0] = (a85_val ) + 33;	178	a85_ptr[0] = (a85_val ) + 33;
96		179
97	a85_ptr += 5;	180	a85_ptr += 5;
98	}	181	}
…		…
121		204
122	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	205	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
123	}	206	}
124		207
125	/////////////////////////////////////////////////////////////////////////////	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	/////////////////////////////////////////////////////////////////////////////
126		303
127	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	304	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
128		305
129	PROTOTYPES: ENABLE	306	PROTOTYPES: ENABLE
130		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	int
		330	common_prefix_length_byte (a, b)
		331	unsigned char a = (unsigned char )SvPVbyte_nolen ($arg);
		332	unsigned char b = (unsigned char )SvPVbyte_nolen ($arg);
		333	CODE:
		334	RETVAL = 0;
		335	while (a == b && *a)
		336	a++, b++, RETVAL++;
		337	OUTPUT:
		338	RETVAL
		339
		340	const char *
		341	magic (SV *path_or_data)
		342	ALIAS:
		343	magic = 0
		344	magic_mime = 1
		345	magic_buffer = 2
		346	magic_buffer_mime = 3
		347	CODE:
		348	{
		349	STRLEN len;
		350	char *data = SvPVbyte (path_or_data, len);
		351
		352	if (!magic_cookie[0])
		353	{
		354	magic_cookie[0] = magic_open (MAGIC_SYMLINK);
		355	magic_cookie[1] = magic_open (MAGIC_SYMLINK \| MAGIC_MIME_TYPE);
		356	magic_load (magic_cookie[0], 0);
		357	magic_load (magic_cookie[1], 0);
		358	}
		359
		360	perlinterp_release ();
		361
		362	RETVAL = ix & 2
		363	? magic_buffer (magic_cookie[ix & 1], data, len)
		364	: magic_file (magic_cookie[ix & 1], data);
		365
		366	perlinterp_acquire ();
		367	}
		368	OUTPUT:
		369	RETVAL
		370
131	# missing in Gtk2 perl module	371	# missing/broken in Gtk2 perl module
		372
		373	void
		374	gdk_window_clear_hints (GdkWindow *window)
		375	CODE:
		376	gdk_window_set_geometry_hints (window, 0, 0);
132		377
133	gboolean	378	gboolean
134	gdk_net_wm_supports (GdkAtom property)	379	gdk_net_wm_supports (GdkAtom property)
135	CODE:	380	CODE:
136	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)	381	#if defined(GDK_WINDOWING_X11) && !defined(GDK_MULTIHEAD_SAFE)
…		…
142	RETVAL	387	RETVAL
143		388
144	GdkPixbuf_noinc *	389	GdkPixbuf_noinc *
145	dealpha_expose (GdkPixbuf *pb)	390	dealpha_expose (GdkPixbuf *pb)
146	CODE:	391	CODE:
		392	perlinterp_release ();
147	{	393	{
148	int w = gdk_pixbuf_get_width (pb);	394	int w = gdk_pixbuf_get_width (pb);
149	int h = gdk_pixbuf_get_height (pb);	395	int h = gdk_pixbuf_get_height (pb);
150	int bpp = gdk_pixbuf_get_n_channels (pb);	396	int bpp = gdk_pixbuf_get_n_channels (pb);
151	int x, y, i;	397	int x, y, i;
…		…
160	for (x = 0; x < w; x++)	406	for (x = 0; x < w; x++)
161	for (y = 0; y < h; y++)	407	for (y = 0; y < h; y++)
162	for (i = 0; i < 3; i++)	408	for (i = 0; i < 3; i++)
163	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];	409	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
164	}	410	}
		411	perlinterp_acquire ();
165	OUTPUT:	412	OUTPUT:
166	RETVAL	413	RETVAL
167		414
168	GdkPixbuf_noinc *	415	GdkPixbuf_noinc *
169	transpose (GdkPixbuf *pb)	416	rotate (GdkPixbuf *pb, int angle)
170	CODE:	417	CODE:
171	{	418	perlinterp_release ();
172	int w = gdk_pixbuf_get_width (pb);	419	if (angle < 0)
173	int h = gdk_pixbuf_get_height (pb);	420	angle += 360;
174	int bpp = gdk_pixbuf_get_n_channels (pb);	421	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
175	int x, y, i;	422	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
176	guchar src = gdk_pixbuf_get_pixels (pb), dst;	423	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
177	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	424	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
178		425	: angle);
179	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	426	perlinterp_acquire ();
180
181	dst = gdk_pixbuf_get_pixels (RETVAL);
182	dstr = gdk_pixbuf_get_rowstride (RETVAL);
183
184	for (y = 0; y < h; y++)
185	for (x = 0; x < w; x++)
186	for (i = 0; i < bpp; i++)
187	dst[y * bpp + x * dstr + i] = src[x * bpp + y * sstr + i];
188	}
189	OUTPUT:	427	OUTPUT:
190	RETVAL	428	RETVAL
191		429
		430	const char *
		431	filetype (SV *image_data)
		432	CODE:
		433	{
		434	STRLEN data_len;
		435	U8 *data = SvPVbyte (image_data, data_len);
		436	static const unsigned char jxl_header[] = {
		437	0, 0, 0, 0x0c, 0x4a, 0x58, 0x4c, 0x20, 0x0d, 0xa, 0x87, 0x0a
		438	};
		439
		440	if (data_len >= 20
		441	&& data[0] == 0xff
		442	&& data[1] == 0xd8
		443	&& data[2] == 0xff)
		444	RETVAL = "image/jpeg";
		445	else if (data_len >= 12
		446	&& data[ 0] == (U8)'R'
		447	&& data[ 1] == (U8)'I'
		448	&& data[ 2] == (U8)'F'
		449	&& data[ 3] == (U8)'F'
		450	&& data[ 8] == (U8)'W'
		451	&& data[ 9] == (U8)'E'
		452	&& data[10] == (U8)'B'
		453	&& data[11] == (U8)'P')
		454	RETVAL = "image/webp";
		455	else if (data_len >= 16
		456	&& data[ 0] == 0x89
		457	&& data[ 1] == (U8)'P'
		458	&& data[ 2] == (U8)'N'
		459	&& data[ 3] == (U8)'G'
		460	&& data[ 4] == 0x0d
		461	&& data[ 5] == 0x0a
		462	&& data[ 6] == 0x1a
		463	&& data[ 7] == 0x0a)
		464	RETVAL = "image/png";
		465	else if (data_len >= sizeof (jxl_header) && memcmp (data, jxl_header, sizeof (jxl_header)) == 0)
		466	RETVAL = "image/jxl"; // todo: might want to use JxlSignatureCheck
		467	else if (data_len >= 2
		468	&& data[0] == 0xff
		469	&& data[1] == 0x0a)
		470	RETVAL = "image/jxl";
		471	else if (data_len >= 13
		472	&& data[0] == 'G'
		473	&& data[1] == 'I'
		474	&& data[2] == 'F'
		475	&& data[3] == '8'
		476	//&& (data[4] == '7' \|\| data[4] == '9')
		477	&& data[5] == 'a')
		478	{
		479	RETVAL = "image/gif";
		480
		481	// now see if its animated - we require the netscape application header for this
		482	int ofs = 13;
		483
		484	if (data[10] & 0x80)
		485	ofs += (1 << ((data[10] & 7) + 1)) * 3;
		486
		487	if (data_len >= ofs + 2 + 1 + 11)
		488	{
		489
		490	// skip a graphic control extension block. we assume
		491	// there is at most one such block - while the NAB
		492	// has to come firstz, some files do not obey this
		493	if (data[ofs] == 0x21 && data[ofs + 1] == 0xf9)
		494	ofs += 3 + data[ofs + 2] + 1;
		495
		496	if (data_len >= ofs + 2 + 1 + 11)
		497	if (!memcmp (data + ofs, "\x21\xff\x0bNETSCAPE2.0", sizeof ("\x21\xff\x0bNETSCAPE2.0") - 1))
		498	RETVAL = "video/gif";
		499	}
		500	}
		501	else if (data_len >= 0x8000 + 6
		502	&& data[0x8000+1] == (U8)'B'
		503	&& data[0x8000+2] == (U8)'E'
		504	&& data[0x8000+3] == (U8)'A'
		505	&& data[0x8000+4] == (U8)'0'
		506	&& data[0x8000+5] == (U8)'1')
		507	RETVAL = "video/iso-bluray";
		508	else if (data_len >= 0x8000 + 6
		509	&& data[0x8000+1] == (U8)'C'
		510	&& data[0x8000+2] == (U8)'D'
		511	&& data[0x8000+3] == (U8)'0'
		512	&& data[0x8000+4] == (U8)'0'
		513	&& data[0x8000+5] == (U8)'1')
		514	RETVAL = "video/iso9660";
		515
		516	else
		517	XSRETURN_UNDEF;
		518	}
		519	OUTPUT:
		520	RETVAL
		521
192	GdkPixbuf_noinc *	522	GdkPixbuf_noinc *
193	flop (GdkPixbuf *pb)	523	decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
194	CODE:	524	CODE:
195	{	525	{
196	int w = gdk_pixbuf_get_width (pb);	526	#if WEBP
197	int h = gdk_pixbuf_get_height (pb);	527	STRLEN data_size;
198	int bpp = gdk_pixbuf_get_n_channels (pb);	528	int alpha;
		529	WebPData data;
		530	WebPDemuxer *demux;
		531	WebPIterator iter;
		532	WebPDecoderConfig config;
199	int x, y, i;	533	int inw, inh;
200	guchar src = gdk_pixbuf_get_pixels (pb), dst;
201	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
202		534
		535	data.bytes = (uint8_t *)SvPVbyte (image_data, data_size);
		536	data.size = data_size;
		537
		538	perlinterp_release ();
		539
		540	RETVAL = 0;
		541
		542	if (!(demux = WebPDemux (&data)))
		543	goto err_demux;
		544
		545	if (!WebPDemuxGetFrame (demux, 1, &iter))
		546	goto err_iter;
		547
		548	if (!WebPInitDecoderConfig (&config))
		549	goto err_iter;
		550
		551	config.options.use_threads = 1;
		552
		553	if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK)
		554	goto err_iter;
		555
		556	inw = config.input.width;
		557	inh = config.input.height;
		558
		559	if (thumbnail)
		560	{
		561	if (inw * ih > inh * iw)
		562	ih = (iw * inh + inw - 1) / inw;
		563	else
		564	iw = (ih * inw + inh - 1) / inh;
		565
		566	config.options.bypass_filtering = 1;
		567	config.options.no_fancy_upsampling = 1;
		568
		569	config.options.use_scaling = 1;
		570	config.options.scaled_width = iw;
		571	config.options.scaled_height = ih;
		572	}
		573	else
		574	{
		575	iw = inw;
		576	ih = inh;
		577	}
		578
		579	alpha = !!config.input.has_alpha;
		580
203	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	581	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih);
		582	if (!RETVAL)
		583	goto err_iter;
204		584
205	dst = gdk_pixbuf_get_pixels (RETVAL);	585	config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
		586	config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
206	dstr = gdk_pixbuf_get_rowstride (RETVAL);	587	config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
		588	config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
		589	config.output.is_external_memory = 1;
207		590
208	for (y = 0; y < h; y++)	591	if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK)
209	for (x = 0; x < w; x++)	592	{
210	for (i = 0; i < bpp; i++)	593	g_object_unref (RETVAL);
211	dst[(w - 1 - x) * bpp + y * dstr + i] = src[x * bpp + y * sstr + i];	594	RETVAL = 0;
		595	goto err_iter;
		596	}
		597
		598	err_iter:
		599	WebPDemuxReleaseIterator (&iter);
		600	err_demux:
		601	WebPDemuxDelete (demux);
		602
		603	perlinterp_acquire ();
		604	#else
		605	croak ("load_webp: webp not enabled at compile time");
		606	#endif
212	}	607	}
213	OUTPUT:	608	OUTPUT:
214	RETVAL	609	RETVAL
215		610
216	GdkPixbuf_noinc *	611	GdkPixbuf_noinc *
217	load_jpeg (SV *path, int thumbnail=0)	612	decode_jxl (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		613	CODE:
		614	{
		615	#if JXL
		616	JxlDecoder *dec;
		617	JxlBasicInfo info;
		618	const uint8_t next_in = (uint8_t )SvPVbyte_nolen (image_data);
		619	size_t avail_in = SvCUR (image_data);
		620	const char *error = 0;
		621	JxlDecoderStatus status;
		622	static void *runner_cache;
		623	void *runner = 0;
		624
		625	RETVAL = 0;
		626
		627	if (runner_cache)
		628	runner = runner_cache;
		629	else
		630	runner = JxlThreadParallelRunnerCreate (0, JxlThreadParallelRunnerDefaultNumWorkerThreads ());
		631
		632	runner_cache = 0;
		633
		634	perlinterp_release ();
		635
		636	dec = JxlDecoderCreate (0);
		637
		638	error = "JxlDecoderCreate failed";
		639	if (!dec)
		640	goto done;
		641
		642	status = JxlDecoderSetParallelRunner (dec, JxlThreadParallelRunner, runner);
		643	error = "JxlDecoderSetParallelRunner failed";
		644	if (status != JXL_DEC_SUCCESS)
		645	goto done;
		646
		647	error = "JxlDecoderSubscribeEvents failed";
		648	status = JxlDecoderSubscribeEvents (dec, JXL_DEC_BASIC_INFO \| JXL_DEC_FULL_IMAGE);
		649	if (status != JXL_DEC_SUCCESS)
		650	goto done;
		651
		652	status = JxlDecoderSetInput (dec, next_in, avail_in);
		653	error = "JxlDecoderSetInput failed";
		654	if (status != JXL_DEC_SUCCESS)
		655	goto done;
		656
		657	for (;;)
		658	{
		659	status = JxlDecoderProcessInput (dec);
		660
		661	switch (status)
		662	{
		663	case JXL_DEC_FULL_IMAGE:
		664	error = 0;
		665	goto done;
		666
		667	case JXL_DEC_ERROR:
		668	error = "JxlDecoderProcessInput failed";
		669	goto done;
		670
		671	case JXL_DEC_NEED_MORE_INPUT:
		672	error = "incomplete file";
		673	goto done;
		674
		675	case JXL_DEC_SUCCESS:
		676	error = "incomplete decode";
		677	goto done;
		678
		679	case JXL_DEC_BASIC_INFO:
		680	{
		681	status = JxlDecoderGetBasicInfo (dec, &info);
		682	error = "JxlDecoderGetBasicInfo failed";
		683	if (status != JXL_DEC_SUCCESS)
		684	goto done;
		685
		686	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!info.alpha_bits, 8, info.xsize, info.ysize);
		687	error = "unable to allocate pixbuf";
		688	if (!RETVAL)
		689	goto done;
		690
		691	JxlPixelFormat format = {
		692	info.alpha_bits ? 4 : 3,
		693	JXL_TYPE_UINT8,
		694	JXL_NATIVE_ENDIAN,
		695	gdk_pixbuf_get_rowstride (RETVAL)
		696	};
		697
		698	// cannot use gdk_pixbuf_get_byte_length because that does
		699	// not return the size of the buffer, but the size of the buffer without
		700	// the last padding bytes. the internal buffer is rowstride * ysize,
		701	// and this is what the jxl decoder needs. none of this is documented
		702	// in either library, of course.
		703
		704	status = JxlDecoderSetImageOutBuffer (
		705	dec,
		706	&format,
		707	gdk_pixbuf_get_pixels (RETVAL),
		708	gdk_pixbuf_get_rowstride (RETVAL) * info.ysize
		709	);
		710	error = "JxlDecoderSetImageOutBuffer failed";
		711	if (status != JXL_DEC_SUCCESS)
		712	goto done;
		713	}
		714	break;
		715
		716	default:
		717	error = "unexpected event";
		718	goto done;
		719	}
		720	}
		721
		722	done:
		723	if (dec)
		724	JxlDecoderDestroy (dec);
		725
		726	perlinterp_acquire ();
		727
		728	if (runner_cache)
		729	JxlThreadParallelRunnerDestroy (runner);
		730
		731	runner_cache = runner;
		732
		733	if (error)
		734	{
		735	if (RETVAL)
		736	g_object_unref (RETVAL);
		737
		738	croak ("load_jxl: %s (status %d)", error, status);
		739	}
		740	#else
		741	croak ("load_jxl: jpeg-xl not enabled at compile time");
		742	#endif
		743	}
		744	OUTPUT:
		745	RETVAL
		746
		747	GdkPixbuf_noinc *
		748	decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
218	CODE:	749	CODE:
219	{	750	{
220	struct jpeg_decompress_struct cinfo;	751	struct jpeg_decompress_struct cinfo;
221	struct jpg_err_mgr jerr;	752	struct jpg_err_mgr jerr;
222	guchar *data;
223	int rs;	753	int rs;
224	FILE *fp;
225	volatile GdkPixbuf *pb = 0;	754	volatile GdkPixbuf *pb = 0;
226	gchar *filename;	755	STRLEN data_len;
		756	guchar *data = SvPVbyte (image_data, data_len);
227		757
228	RETVAL = 0;	758	RETVAL = 0;
229		759
230	filename = g_filename_from_utf8 (SvPVutf8_nolen (path), -1, 0, 0, 0);	760	perlinterp_release ();
231	fp = fopen (filename, "rb");
232	g_free (filename);
233
234	if (!fp)
235	XSRETURN_UNDEF;
236		761
237	cinfo.err = jpeg_std_error (&jerr.err);	762	cinfo.err = jpeg_std_error (&jerr.err);
238		763
239	jerr.err.error_exit = cv_error_exit;	764	jerr.err.error_exit = cv_error_exit;
240	jerr.err.output_message = cv_error_output;	765	jerr.err.output_message = cv_error_output;
241		766
242	if ((rs = setjmp (jerr.setjmp_buffer)))	767	if ((rs = setjmp (jerr.setjmp_buffer)))
243	{	768	{
244	fclose (fp);
245	jpeg_destroy_decompress (&cinfo);	769	jpeg_destroy_decompress (&cinfo);
246		770
247	if (pb)	771	if (pb)
248	g_object_unref ((gpointer)pb);	772	g_object_unref ((gpointer)pb);
249		773
		774	perlinterp_acquire ();
250	XSRETURN_UNDEF;	775	XSRETURN_UNDEF;
251	}	776	}
252		777
		778	if (!data_len)
		779	longjmp (jerr.setjmp_buffer, 4);
		780
253	jpeg_create_decompress (&cinfo);	781	jpeg_create_decompress (&cinfo);
		782	cv_jpeg_mem_src (&cinfo, data, data_len);
254		783
255	jpeg_stdio_src (&cinfo, fp);
256	jpeg_read_header (&cinfo, TRUE);	784	jpeg_read_header (&cinfo, TRUE);
257		785
258	cinfo.dct_method = JDCT_DEFAULT;	786	cinfo.dct_method = JDCT_DEFAULT;
259	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */	787	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
260	cinfo.do_block_smoothing = FALSE;	788	cinfo.do_block_smoothing = FALSE;
…		…
270	{	798	{
271	cinfo.dct_method = JDCT_FASTEST;	799	cinfo.dct_method = JDCT_FASTEST;
272	cinfo.do_fancy_upsampling = FALSE;	800	cinfo.do_fancy_upsampling = FALSE;
273		801
274	while (cinfo.scale_denom < 8	802	while (cinfo.scale_denom < 8
275	&& cinfo.output_width >= IW*4	803	&& cinfo.output_width >= iw*4
276	&& cinfo.output_height >= IH*4)	804	&& cinfo.output_height >= ih*4)
277	{	805	{
278	cinfo.scale_denom <<= 1;	806	cinfo.scale_denom <<= 1;
279	jpeg_calc_output_dimensions (&cinfo);	807	jpeg_calc_output_dimensions (&cinfo);
280	}	808	}
281	}	809	}
282		810
		811	if (cinfo.output_components != 3)
		812	longjmp (jerr.setjmp_buffer, 3);
		813
		814	if (cinfo.jpeg_color_space == JCS_YCCK \|\| cinfo.jpeg_color_space == JCS_CMYK)
		815	{
		816	cinfo.out_color_space = JCS_CMYK;
		817	cinfo.output_components = 4;
		818	}
		819
283	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);	820	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
284	if (!RETVAL)	821	if (!RETVAL)
285	longjmp (jerr.setjmp_buffer, 2);	822	longjmp (jerr.setjmp_buffer, 2);
286		823
287	data = gdk_pixbuf_get_pixels (RETVAL);	824	data = gdk_pixbuf_get_pixels (RETVAL);
288	rs = gdk_pixbuf_get_rowstride (RETVAL);	825	rs = gdk_pixbuf_get_rowstride (RETVAL);
289
290	if (cinfo.output_components != 3)
291	longjmp (jerr.setjmp_buffer, 3);
292		826
293	jpeg_start_decompress (&cinfo);	827	jpeg_start_decompress (&cinfo);
294		828
295	while (cinfo.output_scanline < cinfo.output_height)	829	while (cinfo.output_scanline < cinfo.output_height)
296	{	830	{
…		…
303	rp [3] = (guchar *)rp [2] + rs;	837	rp [3] = (guchar *)rp [2] + rs;
304		838
305	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);	839	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
306	}	840	}
307		841
		842	if (cinfo.out_color_space == JCS_CMYK)
		843	{
		844	guchar end = data + cinfo.output_height rs;
		845
		846	while (data < end)
		847	{
		848	U32 c = data [0];
		849	U32 m = data [1];
		850	U32 y = data [2];
		851	U32 k = data [3];
		852
		853	if (0)
		854	if (cinfo.Adobe_transform == 2)
		855	{
		856	c ^= 0xff;
		857	m ^= 0xff;
		858	y ^= 0xff;
		859	k ^= 0xff;
		860	}
		861
		862	data [0] = (c * k + 0x80) / 0xff;
		863	data [1] = (m * k + 0x80) / 0xff;
		864	data [2] = (y * k + 0x80) / 0xff;
		865	data [3] = 0xff;
		866
		867	data += 4;
		868	}
		869	}
		870
308	jpeg_finish_decompress (&cinfo);	871	jpeg_finish_decompress (&cinfo);
309	fclose (fp);
310	jpeg_destroy_decompress (&cinfo);	872	jpeg_destroy_decompress (&cinfo);
		873	perlinterp_acquire ();
311	}	874	}
312	OUTPUT:	875	OUTPUT:
313	RETVAL	876	RETVAL
314		877
		878	void
		879	compare (GdkPixbuf a, GdkPixbuf b)
		880	PPCODE:
		881	perlinterp_release ();
		882	{
		883	int w = gdk_pixbuf_get_width (a);
		884	int h = gdk_pixbuf_get_height (a);
		885
		886	int sa = gdk_pixbuf_get_rowstride (a);
		887	int sb = gdk_pixbuf_get_rowstride (b);
		888
		889	guchar *pa = gdk_pixbuf_get_pixels (a);
		890	guchar *pb = gdk_pixbuf_get_pixels (b);
		891
		892	int x, y;
		893
		894	assert (w == gdk_pixbuf_get_width (b));
		895	assert (h == gdk_pixbuf_get_height (b));
		896
		897	assert (gdk_pixbuf_get_n_channels (a) == 3);
		898	assert (gdk_pixbuf_get_n_channels (b) == 3);
		899
		900	double diff = 0.;
		901	int peak = 0;
		902
		903	if (w && h)
		904	for (y = 0; y < h; y++)
		905	{
		906	guchar pa_ = pa + y sa;
		907	guchar pb_ = pb + y sb;
		908
		909	for (x = 0; x < w; x++)
		910	{
		911	int d;
		912
		913	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		914	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		915	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
		916	}
		917	}
		918
		919	perlinterp_acquire ();
		920
		921	EXTEND (SP, 2);
		922	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
		923	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
		924	}
		925
315	#############################################################################	926	#############################################################################
316		927
317	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	928	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
		929
		930	# currently only works for filenames (octet strings)
318		931
319	SV *	932	SV *
320	foldcase (SV *pathsv)	933	foldcase (SV *pathsv)
321	PROTOTYPE: $	934	PROTOTYPE: $
322	CODE:	935	CODE:
323	{	936	{
324	STRLEN plen;	937	STRLEN plen;
325	U8 path = (U8 )SvPVutf8 (pathsv, plen);	938	U8 path = (U8 )SvPV (pathsv, plen);
326	U8 *pend = path + plen;	939	U8 *pend = path + plen;
327	U8 dst [plen * 6 * 3], *dstp = dst;	940	U8 dst [plen * 8 * 3], *dstp = dst;
328		941
329	while (path < pend)	942	while (path < pend)
330	{	943	{
331	U8 ch = *path;	944	U8 ch = *path;
332		945
333	if (ch >= 'a' && ch <= 'z')	946	if (ch >= 'a' && ch <= 'z')
334	dstp++ = path++;	947	dstp++ = path++;
		948	else if (ch >= 'A' && ch <= 'Z')
		949	dstp++ = path++ + ('a' - 'A');
335	else if (ch >= '0' && ch <= '9')	950	else if (ch >= '0' && ch <= '9')
336	{	951	{
		952	/* version sort, up to 8 digits */
337	STRLEN el, nl = 0;	953	STRLEN el, nl = 0;
338	while (path >= '0' && path <= '9' && path < pend)	954	while (path >= '0' && path <= '9' && path < pend)
339	path++, nl++;	955	path++, nl++;
340		956
341	for (el = nl; el < 6; el++)	957	for (el = nl; el < 8; el++)
342	*dstp++ = '0';	958	*dstp++ = '0';
343		959
344	memcpy (dstp, path - nl, nl);	960	memcpy (dstp, path - nl, nl);
345	dstp += nl;	961	dstp += nl;
346	}	962	}
		963	else
		964	dstp++ = path++;
		965	#if 0
347	else	966	else
348	{	967	{
349	STRLEN cl;	968	STRLEN cl;
350	to_utf8_fold (path, dstp, &cl);	969	to_utf8_fold (path, dstp, &cl);
351	dstp += cl;	970	dstp += cl;
352	path += is_utf8_char (path);	971	path += is_utf8_char (path);
353	}	972	}
		973	#endif
354	}	974	}
355		975
356	RETVAL = newSVpvn ((const char *)dst, dstp - dst);	976	RETVAL = newSVpvn ((const char *)dst, dstp - dst);
357	}	977	}
358	OUTPUT:	978	OUTPUT:
…		…
383	}	1003	}
384	}	1004	}
385	OUTPUT:	1005	OUTPUT:
386	RETVAL	1006	RETVAL
387		1007
		1008	#############################################################################
		1009
		1010	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
		1011
		1012	void
		1013	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
		1014	CODE:
		1015	{
		1016	int w = gdk_pixbuf_get_width (pb);
		1017	int h = gdk_pixbuf_get_height (pb);
		1018	int x, y, i;
		1019	guchar *dst;
		1020	int bpp = gdk_pixbuf_get_n_channels (pb);
		1021	guchar *src = gdk_pixbuf_get_pixels (pb);
		1022	int sstr = gdk_pixbuf_get_rowstride (pb);
		1023
		1024	a85_init ();
		1025
		1026	for (y = 0; y < h; y++)
		1027	for (x = 0; x < w; x++)
		1028	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		1029	a85_push (fp, src [x * bpp + y * sstr + i]);
		1030
		1031	a85_finish (fp);
		1032	}
		1033
		1034	void
		1035	dump_binary (PerlIO fp, GdkPixbuf pb)
		1036	CODE:
		1037	{
		1038	int w = gdk_pixbuf_get_width (pb);
		1039	int h = gdk_pixbuf_get_height (pb);
		1040	int x, y, i;
		1041	guchar *dst;
		1042	int bpp = gdk_pixbuf_get_n_channels (pb);
		1043	guchar *src = gdk_pixbuf_get_pixels (pb);
		1044	int sstr = gdk_pixbuf_get_rowstride (pb);
		1045
		1046	for (y = 0; y < h; y++)
		1047	for (x = 0; x < w; x++)
		1048	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
		1049	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
		1050	}
		1051
		1052	#############################################################################
		1053
		1054	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
		1055
388	SV *	1056	SV *
389	pb_to_p7 (GdkPixbuf *pb)	1057	pb_to_hv84 (GdkPixbuf *pb)
390	CODE:	1058	CODE:
391	{	1059	{
392	int w = gdk_pixbuf_get_width (pb);	1060	int w = gdk_pixbuf_get_width (pb);
393	int h = gdk_pixbuf_get_height (pb);	1061	int h = gdk_pixbuf_get_height (pb);
394	int x, y;	1062	int x, y;
395	guchar *dst;	1063	guchar *dst;
396	int bpp = gdk_pixbuf_get_n_channels (pb);	1064	int bpp = gdk_pixbuf_get_n_channels (pb);
397	guchar *src = gdk_pixbuf_get_pixels (pb);	1065	guchar *src = gdk_pixbuf_get_pixels (pb);
398	int sstr = gdk_pixbuf_get_rowstride (pb);	1066	int sstr = gdk_pixbuf_get_rowstride (pb);
399	int Er[IW], Eg[IW], Eb[IW];
400	int seed = 77;
401
402	RETVAL = newSV (w * h);
403	SvPOK_only (RETVAL);
404	SvCUR_set (RETVAL, w * h);
405
406	dst = (guchar *)SvPVX (RETVAL);
407
408	memset (Er, 0, sizeof (int) * IW);
409	memset (Eg, 0, sizeof (int) * IW);
410	memset (Eb, 0, sizeof (int) * IW);
411
412	/* some primitive error distribution + random dithering */
413
414	for (y = 0; y < h; y++)
415	{
416	int er = 0, eg = 0, eb = 0;
417
418	for (x = 0; x < w; x++)
419	{
420	int r, g, b;
421	guchar p = src + x bpp + y * sstr;
422
423	r = ((p[0] + er + Er[x]) * 7 + (RAND & 127) + 64) / 255;
424	g = ((p[1] + eg + Eg[x]) * 7 + (RAND & 127) + 64) / 255;
425	b = ((p[2] + eb + Eb[x]) * 3 + (RAND & 127) + 64) / 255;
426
427	r = r > 7 ? 7 : r < 0 ? 0 : r;
428	g = g > 7 ? 7 : g < 0 ? 0 : g;
429	b = b > 3 ? 3 : b < 0 ? 0 : b;
430
431	er += p[0] - (r * 255 + 4) / 7;
432	eg += p[1] - (g * 255 + 4) / 7;
433	eb += p[2] - (b * 255 + 2) / 3;
434
435	Er[x] = er >> 1; er -= (er + 1) >> 1;
436	Eg[x] = eg >> 1; eg -= (eg + 1) >> 1;
437	Eb[x] = eb >> 1; eb -= (eb + 1) >> 1;
438
439	*dst++ = r << 5 \| g << 2 \| b;
440	}
441	}
442	}
443	OUTPUT:
444	RETVAL
445
446	#############################################################################
447
448	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::PostScript
449
450	void
451	dump_ascii85 (PerlIO fp, GdkPixbuf pb)
452	CODE:
453	{
454	int w = gdk_pixbuf_get_width (pb);
455	int h = gdk_pixbuf_get_height (pb);
456	int x, y, i;
457	guchar *dst;
458	int bpp = gdk_pixbuf_get_n_channels (pb);
459	guchar *src = gdk_pixbuf_get_pixels (pb);
460	int sstr = gdk_pixbuf_get_rowstride (pb);
461
462	a85_init ();
463
464	for (y = 0; y < h; y++)
465	for (x = 0; x < w; x++)
466	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
467	a85_push (fp, src [x * bpp + y * sstr + i]);
468
469	a85_finish (fp);
470	}
471
472	void
473	dump_binary (PerlIO fp, GdkPixbuf pb)
474	CODE:
475	{
476	int w = gdk_pixbuf_get_width (pb);
477	int h = gdk_pixbuf_get_height (pb);
478	int x, y, i;
479	guchar *dst;
480	int bpp = gdk_pixbuf_get_n_channels (pb);
481	guchar *src = gdk_pixbuf_get_pixels (pb);
482	int sstr = gdk_pixbuf_get_rowstride (pb);
483
484	for (y = 0; y < h; y++)
485	for (x = 0; x < w; x++)
486	for (i = 0; i < (bpp < 3 ? 1 : 3); i++)
487	PerlIO_putc (fp, src [x * bpp + y * sstr + i]);
488	}
489
490	#############################################################################
491
492	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
493
494	SV *
495	pb_to_hv84 (GdkPixbuf *pb)
496	CODE:
497	{
498	int w = gdk_pixbuf_get_width (pb);
499	int h = gdk_pixbuf_get_height (pb);
500	int x, y;
501	guchar *dst;
502	int bpp = gdk_pixbuf_get_n_channels (pb);
503	guchar *src = gdk_pixbuf_get_pixels (pb);
504	int sstr = gdk_pixbuf_get_rowstride (pb);
505		1067
506	RETVAL = newSV (6 * 8 * 12 / 8);	1068	RETVAL = newSV (6 * 8 * 12 / 8);
507	SvPOK_only (RETVAL);	1069	SvPOK_only (RETVAL);
508	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	1070	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
509		1071
…		…
578	#############################################################################	1140	#############################################################################
579		1141
580	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster	1142	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
581		1143
582	SV *	1144	SV *
583	make_histograms (SV *ar)	1145	extract_features (SV *ar)
584	CODE:	1146	CODE:
585	{	1147	{
586	int i;	1148	int i;
587	AV av, result;	1149	AV av, result;
588		1150
589	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)	1151	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
590	croak ("Not an array ref as first argument to make_histogram");	1152	croak ("Not an array ref as first argument to extract_features");
591		1153
592	av = (AV *) SvRV (ar);	1154	av = (AV *) SvRV (ar);
593	result = newAV ();	1155	result = newAV ();
594		1156
595	for (i = 0; i <= av_len (av); ++i)	1157	for (i = 0; i <= av_len (av); ++i)
596	{	1158	{
597	const int HISTSIZE = 64;
598
599	int j;
600	SV sv = av_fetch (av, i, 1);	1159	SV sv = av_fetch (av, i, 1);
601	STRLEN len;
602	char *buf = SvPVbyte (sv, len);
603
604	int tmphist[HISTSIZE];
605	float *hist;
606
607	SV histsv = newSV (HISTSIZE sizeof (float) + 1);	1160	SV histsv = newSV (9 sizeof (float) + 1);
		1161
608	SvPOK_on (histsv);	1162	SvPOK_on (histsv);
609	SvCUR_set (histsv, HISTSIZE * sizeof (float));	1163	SvCUR_set (histsv, 9 * sizeof (float));
610	hist = (float *)SvPVX (histsv);	1164	float hist = (float )SvPVX (histsv);
611		1165
612	Zero (tmphist, sizeof (tmphist), char);	1166	struct feature f_h, f_s, f_v;
		1167	feature_init (&f_h);
		1168	feature_init (&f_s);
		1169	feature_init (&f_v);
613		1170
614	for (j = len; j--; )
615	{
616	unsigned int idx
617	= ((*buf & 0xc0) >> 2)
618	\| ((*buf & 0x18) >> 1)
619	\| (*buf & 0x03);
620
621	++tmphist[idx];
622	++buf;
623	}
624		1171	{
625	for (j = 0; j < HISTSIZE; ++j)	1172	STRLEN len;
626	hist[j] = (float)tmphist[j] / (len + 1e-30);	1173	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		1174	while (len >= 3)
		1175	{
		1176	unsigned int r, g, b, h, s, v;
		1177	r = buf++; g = buf++; b = *buf++;
		1178	rgb_to_hsv (r, g, b, &h, &s, &v);
		1179
		1180	feature_update_pass_1 (&f_h, h);
		1181	feature_update_pass_1 (&f_s, s);
		1182	feature_update_pass_1 (&f_v, v);
		1183
		1184	len -= 3;
		1185	}
		1186
		1187	feature_finish_pass_1 (&f_h);
		1188	feature_finish_pass_1 (&f_s);
		1189	feature_finish_pass_1 (&f_v);
		1190	}
		1191
		1192	{
		1193	STRLEN len;
		1194	unsigned char buf = (unsigned char )SvPVbyte (sv, len);
		1195	while (len >= 3)
		1196	{
		1197	unsigned int r, g, b, h, s, v;
		1198	r = buf++; g = buf++; b = *buf++;
		1199	rgb_to_hsv (r, g, b, &h, &s, &v);
		1200
		1201	feature_update_pass_2 (&f_h, h);
		1202	feature_update_pass_2 (&f_s, s);
		1203	feature_update_pass_2 (&f_v, v);
		1204
		1205	len -= 3;
		1206	}
		1207
		1208	feature_finish_pass_2 (&f_h);
		1209	feature_finish_pass_2 (&f_s);
		1210	feature_finish_pass_2 (&f_v);
		1211	}
		1212
		1213	hist [0] = f_h.v1 * 2.; hist [1] = f_h.v2 * 2.; hist [2] = f_h.v3 * 2.;
		1214	hist [3] = f_s.v1 ; hist [4] = f_s.v2 ; hist [5] = f_s.v3 ;
		1215	hist [6] = f_v.v1 * .5; hist [7] = f_v.v2 * .5; hist [8] = f_v.v3 * .5;
627		1216
628	av_push (result, histsv);	1217	av_push (result, histsv);
629	}	1218	}
630		1219
631	RETVAL = newRV_noinc ((SV *)result);	1220	RETVAL = newRV_noinc ((SV *)result);
632	}	1221	}
633	OUTPUT:	1222	OUTPUT:
634	RETVAL	1223	RETVAL
635		1224
636

Diff Legend

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

Comparing CV/CV.xs (file contents): Revision 1.27 by root, Sun Aug 21 02:23:52 2005 UTC vs. Revision 1.70 by root, Thu Jun 8 15:42:03 2023 UTC

Diff Legend

Comparing CV/CV.xs (file contents):
Revision 1.27 by root, Sun Aug 21 02:23:52 2005 UTC vs.
Revision 1.70 by root, Thu Jun 8 15:42:03 2023 UTC