[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 1.56 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>
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	#include "perlmulticore.h"
		30
13	#define IW 80 /* MUST match Schnauer.pm! */	31	#define IW 80 /* MUST match Schnauzer.pm! */
14	#define IH 60 /* MUST match Schnauer.pm! */	32	#define IH 60 /* MUST match Schnauzer.pm! */
15		33
16	#define RAND (seed = (seed + 7141) * 54773 % 134456)	34	#define RAND (seed = (seed + 7141) * 54773 % 134456)
17		35
18	#define LINELENGTH 240	36	#define LINELENGTH 240
19		37
20	#define ELLIPSIS "\xe2\x80\xa6"	38	#define ELLIPSIS "\xe2\x80\xa6"
		39
		40	typedef char *octet_string;
		41
		42	static magic_t magic_cookie[2]; /* !mime, mime */
21		43
22	struct jpg_err_mgr	44	struct jpg_err_mgr
23	{	45	{
24	struct jpeg_error_mgr err;	46	struct jpeg_error_mgr err;
25	jmp_buf setjmp_buffer;	47	jmp_buf setjmp_buffer;
26	};	48	};
27		49
28	static void	50	static void
29	cv_error_exit (j_common_ptr cinfo)	51	cv_error_exit (j_common_ptr cinfo)
30	{	52	{
		53	cinfo->err->output_message (cinfo);
31	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);	54	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
32	}	55	}
33		56
34	static void	57	static void
35	cv_error_output (j_common_ptr cinfo)	58	cv_error_output (j_common_ptr cinfo)
36	{	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);
37	return;	65	return;
38	}	66	}
39		67
40	static void	68	static void
41	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,	69	rgb_to_hsv (unsigned int r, unsigned int g, unsigned int b,
62		90
63	*h &= 255;	91	*h &= 255;
64	}	92	}
65	}	93	}
66		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	}
		149
67	static guint32 a85_val;	150	static guint32 a85_val;
68	static guint a85_cnt;	151	static guint a85_cnt;
69	static guchar a85_buf[LINELENGTH], *a85_ptr;	152	static guchar a85_buf[LINELENGTH], *a85_ptr;
70		153
71	static void	154	static void
…		…
83	if (!--a85_cnt)	166	if (!--a85_cnt)
84	{	167	{
85	a85_cnt = 4;	168	a85_cnt = 4;
86	if (a85_val)	169	if (a85_val)
87	{	170	{
88	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;	171	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
89	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;	172	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
90	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;	173	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
91	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;	174	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
92	a85_ptr[0] = (a85_val ) + 33;	175	a85_ptr[0] = (a85_val ) + 33;
93		176
94	a85_ptr += 5;	177	a85_ptr += 5;
95	}	178	}
…		…
118		201
119	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	202	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
120	}	203	}
121		204
122	/////////////////////////////////////////////////////////////////////////////	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	/////////////////////////////////////////////////////////////////////////////
123		255
124	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	256	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
125		257
126	PROTOTYPES: ENABLE	258	PROTOTYPES: ENABLE
127		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
128	GdkPixbuf_noinc *	327	GdkPixbuf_noinc *
129	transpose (GdkPixbuf *pb)	328	dealpha_expose (GdkPixbuf *pb)
130	CODE:	329	CODE:
		330	perlinterp_release ();
131	{	331	{
132	int w = gdk_pixbuf_get_width (pb);	332	int w = gdk_pixbuf_get_width (pb);
133	int h = gdk_pixbuf_get_height (pb);	333	int h = gdk_pixbuf_get_height (pb);
134	int bpp = gdk_pixbuf_get_n_channels (pb);	334	int bpp = gdk_pixbuf_get_n_channels (pb);
135	int x, y, i;	335	int x, y, i;
136	guchar src = gdk_pixbuf_get_pixels (pb), dst;	336	guchar src = gdk_pixbuf_get_pixels (pb), dst;
137	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	337	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;
138		338
139	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, h, w);	339	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
140		340
141	dst = gdk_pixbuf_get_pixels (RETVAL);	341	dst = gdk_pixbuf_get_pixels (RETVAL);
142	dstr = gdk_pixbuf_get_rowstride (RETVAL);	342	dstr = gdk_pixbuf_get_rowstride (RETVAL);
143		343
144	for (y = 0; y < h; y++)
145	for (x = 0; x < w; x++)	344	for (x = 0; x < w; x++)
		345	for (y = 0; y < h; y++)
146	for (i = 0; i < bpp; i++)	346	for (i = 0; i < 3; i++)
147	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];
148	}	348	}
		349	perlinterp_acquire ();
149	OUTPUT:	350	OUTPUT:
150	RETVAL	351	RETVAL
151		352
152	GdkPixbuf_noinc *	353	GdkPixbuf_noinc *
153	flop (GdkPixbuf *pb)	354	rotate (GdkPixbuf *pb, int angle)
154	CODE:	355	CODE:
155	{	356	perlinterp_release ();
156	int w = gdk_pixbuf_get_width (pb);	357	if (angle < 0)
157	int h = gdk_pixbuf_get_height (pb);	358	angle += 360;
158	int bpp = gdk_pixbuf_get_n_channels (pb);	359	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
159	int x, y, i;	360	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
160	guchar src = gdk_pixbuf_get_pixels (pb), dst;	361	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
161	int sstr = gdk_pixbuf_get_rowstride (pb), dstr;	362	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
162		363	: angle);
163	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, bpp == 4, 8, w, h);	364	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:	365	OUTPUT:
174	RETVAL	366	RETVAL
175		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
176	GdkPixbuf_noinc *	406	GdkPixbuf_noinc *
177	load_jpeg (char *path, int thumbnail=0)	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)
178	CODE:	497	CODE:
179	{	498	{
180	struct jpeg_decompress_struct cinfo;	499	struct jpeg_decompress_struct cinfo;
181	struct jpg_err_mgr jerr;	500	struct jpg_err_mgr jerr;
182	guchar *data;
183	int rs;	501	int rs;
184	FILE *fp;
185	volatile GdkPixbuf *pb = 0;	502	volatile GdkPixbuf *pb = 0;
		503	STRLEN data_len;
		504	guchar *data = SvPVbyte (image_data, data_len);
		505
186	RETVAL = 0;	506	RETVAL = 0;
187		507
188	if (!(fp = fopen (path, "rb")))	508	perlinterp_release ();
189	XSRETURN_UNDEF;
190		509
191	cinfo.err = jpeg_std_error (&jerr.err);	510	cinfo.err = jpeg_std_error (&jerr.err);
192		511
193	jerr.err.error_exit = cv_error_exit;	512	jerr.err.error_exit = cv_error_exit;
194	jerr.err.output_message = cv_error_output;	513	jerr.err.output_message = cv_error_output;
195		514
196	if ((rs = setjmp (jerr.setjmp_buffer)))	515	if ((rs = setjmp (jerr.setjmp_buffer)))
197	{	516	{
198	fclose (fp);
199	jpeg_destroy_decompress (&cinfo);	517	jpeg_destroy_decompress (&cinfo);
200		518
201	if (pb)	519	if (pb)
202	g_object_unref ((gpointer)pb);	520	g_object_unref ((gpointer)pb);
203		521
		522	perlinterp_acquire ();
204	XSRETURN_UNDEF;	523	XSRETURN_UNDEF;
205	}	524	}
206		525
207	jpeg_create_decompress (&cinfo);	526	jpeg_create_decompress (&cinfo);
		527	cv_jpeg_mem_src (&cinfo, data, data_len);
208		528
209	jpeg_stdio_src (&cinfo, fp);
210	jpeg_read_header (&cinfo, TRUE);	529	jpeg_read_header (&cinfo, TRUE);
211		530
212	cinfo.dct_method = JDCT_DEFAULT;	531	cinfo.dct_method = JDCT_DEFAULT;
213	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */	532	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
214	cinfo.do_block_smoothing = FALSE;	533	cinfo.do_block_smoothing = FALSE;
…		…
224	{	543	{
225	cinfo.dct_method = JDCT_FASTEST;	544	cinfo.dct_method = JDCT_FASTEST;
226	cinfo.do_fancy_upsampling = FALSE;	545	cinfo.do_fancy_upsampling = FALSE;
227		546
228	while (cinfo.scale_denom < 8	547	while (cinfo.scale_denom < 8
229	&& (cinfo.output_width >> 1) >= IW	548	&& cinfo.output_width >= iw*4
230	&& (cinfo.output_height >> 1) >= IH)	549	&& cinfo.output_height >= ih*4)
231	{	550	{
232	cinfo.scale_denom <<= 1;	551	cinfo.scale_denom <<= 1;
233	jpeg_calc_output_dimensions (&cinfo);	552	jpeg_calc_output_dimensions (&cinfo);
234	}	553	}
235	}	554	}
236		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
237	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);	565	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
238	if (!RETVAL)	566	if (!RETVAL)
239	longjmp (jerr.setjmp_buffer, 2);	567	longjmp (jerr.setjmp_buffer, 2);
240		568
241	data = gdk_pixbuf_get_pixels (RETVAL);	569	data = gdk_pixbuf_get_pixels (RETVAL);
242	rs = gdk_pixbuf_get_rowstride (RETVAL);	570	rs = gdk_pixbuf_get_rowstride (RETVAL);
243
244	if (cinfo.output_components != 3)
245	longjmp (jerr.setjmp_buffer, 3);
246		571
247	jpeg_start_decompress (&cinfo);	572	jpeg_start_decompress (&cinfo);
248		573
249	while (cinfo.output_scanline < cinfo.output_height)	574	while (cinfo.output_scanline < cinfo.output_height)
250	{	575	{
…		…
257	rp [3] = (guchar *)rp [2] + rs;	582	rp [3] = (guchar *)rp [2] + rs;
258		583
259	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);	584	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
260	}	585	}
261		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
262	jpeg_finish_decompress (&cinfo);	616	jpeg_finish_decompress (&cinfo);
263	fclose (fp);
264	jpeg_destroy_decompress (&cinfo);	617	jpeg_destroy_decompress (&cinfo);
		618	perlinterp_acquire ();
265	}	619	}
266	OUTPUT:	620	OUTPUT:
267	RETVAL	621	RETVAL
268		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
269	#############################################################################	671	#############################################################################
270		672
271	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer	673	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Schnauzer
272		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
273	GdkPixbuf_noinc *	725	GdkPixbuf_noinc *
274	p7_to_pb (int w, int h, guchar *src)	726	p7_to_pb (int w, int h, SV *src_sv)
		727	PROTOTYPE: @
275	CODE:	728	CODE:
276	{	729	{
277	int x, y;	730	int x, y;
278	guchar dst, d;	731	guchar dst, d;
279	int dstr;	732	int dstr;
		733	guchar src = (guchar )SvPVbyte_nolen (src_sv);
280		734
281	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);	735	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, w, h);
282	dst = gdk_pixbuf_get_pixels (RETVAL);	736	dst = gdk_pixbuf_get_pixels (RETVAL);
283	dstr = gdk_pixbuf_get_rowstride (RETVAL);	737	dstr = gdk_pixbuf_get_rowstride (RETVAL);
284		738
…		…
293	}	747	}
294	}	748	}
295	OUTPUT:	749	OUTPUT:
296	RETVAL	750	RETVAL
297		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
298	SV *	800	SV *
299	pb_to_p7 (GdkPixbuf *pb)	801	pb_to_hv84 (GdkPixbuf *pb)
300	CODE:	802	CODE:
301	{	803	{
302	int w = gdk_pixbuf_get_width (pb);	804	int w = gdk_pixbuf_get_width (pb);
303	int h = gdk_pixbuf_get_height (pb);	805	int h = gdk_pixbuf_get_height (pb);
304	int x, y;	806	int x, y;
305	guchar *dst;	807	guchar *dst;
306	int bpp = gdk_pixbuf_get_n_channels (pb);	808	int bpp = gdk_pixbuf_get_n_channels (pb);
307	guchar *src = gdk_pixbuf_get_pixels (pb);	809	guchar *src = gdk_pixbuf_get_pixels (pb);
308	int sstr = gdk_pixbuf_get_rowstride (pb);	810	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		811
470	RETVAL = newSV (6 * 8 * 12 / 8);	812	RETVAL = newSV (6 * 8 * 12 / 8);
471	SvPOK_only (RETVAL);	813	SvPOK_only (RETVAL);
472	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);	814	SvCUR_set (RETVAL, 6 * 8 * 12 / 8);
473		815
474	dst = SvPVX (RETVAL);	816	dst = (guchar *)SvPVX (RETVAL);
475		817
476	/* some primitive error distribution + random dithering */	818	/* some primitive error distribution + random dithering */
477		819
478	for (y = 0; y < h; y++)	820	for (y = 0; y < h; y++)
479	{	821	{
…		…
537	}	879	}
538	}	880	}
539	OUTPUT:	881	OUTPUT:
540	RETVAL	882	RETVAL
541		883
		884	#############################################################################
542		885
		886	MODULE = Gtk2::CV PACKAGE = Gtk2::CV::Plugin::RCluster
543		887
		888	SV *
		889	extract_features (SV *ar)
		890	CODE:
		891	{
		892	int i;
		893	AV av, result;
		894
		895	if (!SvROK (ar) \|\| SvTYPE (SvRV (ar)) != SVt_PVAV)
		896	croak ("Not an array ref as first argument to extract_features");
		897
		898	av = (AV *) SvRV (ar);
		899	result = newAV ();
		900
		901	for (i = 0; i <= av_len (av); ++i)
		902	{
		903	SV sv = av_fetch (av, i, 1);
		904	SV histsv = newSV (9 sizeof (float) + 1);
		905
		906	SvPOK_on (histsv);
		907	SvCUR_set (histsv, 9 * sizeof (float));
		908	float hist = (float )SvPVX (histsv);
		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);
		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);
		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 1.17 by root, Wed Jul 20 06:20:36 2005 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 1.17 by root, Wed Jul 20 06:20:36 2005 UTC vs.
Revision 1.56 by root, Wed Dec 27 17:48:16 2017 UTC