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

Comparing CV/CV.xs (file contents):
Revision 1.43 by root, Sun May 3 08:16:47 2009 UTC vs.
Revision 1.59 by root, Sat Apr 10 03:32:09 2021 UTC

…		…
7	#include <math.h>	7	#include <math.h>
8		8
9	#include <magic.h>	9	#include <magic.h>
10		10
11	#include <jpeglib.h>	11	#include <jpeglib.h>
		12	#include <jerror.h>
		13
12	#include <glib.h>	14	#include <glib.h>
13	#include <gtk/gtk.h>	15	#include <gtk/gtk.h>
		16	#include <gdk/gdkx.h>
14	#include <gdk-pixbuf/gdk-pixbuf.h>	17	#include <gdk-pixbuf/gdk-pixbuf.h>
15		18
16	#include <gperl.h>	19	#include <gperl.h>
17	#include <gtk2perl.h>	20	#include <gtk2perl.h>
18		21
19	#include <assert.h>	22	#include <assert.h>
20		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
21	#define IW 80 /* MUST match Schnauzer.pm! */	36	#define IW 80 /* MUST match Schnauzer.pm! */
22	#define IH 60 /* MUST match Schnauzer.pm! */	37	#define IH 60 /* MUST match Schnauzer.pm! */
23		38
24	#define RAND (seed = (seed + 7141) * 54773 % 134456)
25
26	#define LINELENGTH 240	39	#define LINELENGTH 240
27		40
28	#define ELLIPSIS "\xe2\x80\xa6"	41	#define ELLIPSIS "\xe2\x80\xa6"
29		42
30	typedef char *octet_string;	43	typedef char *octet_string;
		44
		45	static magic_t magic_cookie[2]; /* !mime, mime */
31		46
32	struct jpg_err_mgr	47	struct jpg_err_mgr
33	{	48	{
34	struct jpeg_error_mgr err;	49	struct jpeg_error_mgr err;
35	jmp_buf setjmp_buffer;	50	jmp_buf setjmp_buffer;
36	};	51	};
37		52
38	static void	53	static void
39	cv_error_exit (j_common_ptr cinfo)	54	cv_error_exit (j_common_ptr cinfo)
40	{	55	{
		56	cinfo->err->output_message (cinfo);
41	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);	57	longjmp (((struct jpg_err_mgr *)cinfo->err)->setjmp_buffer, 99);
42	}	58	}
43		59
44	static void	60	static void
45	cv_error_output (j_common_ptr cinfo)	61	cv_error_output (j_common_ptr cinfo)
46	{	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);
47	return;	68	return;
48	}	69	}
49		70
50	static void	71	static void
51	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,
…		…
148	if (!--a85_cnt)	169	if (!--a85_cnt)
149	{	170	{
150	a85_cnt = 4;	171	a85_cnt = 4;
151	if (a85_val)	172	if (a85_val)
152	{	173	{
153	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;	174	a85_ptr[4] = (a85_val % 85) + 33; a85_val /= 85;
154	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;	175	a85_ptr[3] = (a85_val % 85) + 33; a85_val /= 85;
155	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;	176	a85_ptr[2] = (a85_val % 85) + 33; a85_val /= 85;
156	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;	177	a85_ptr[1] = (a85_val % 85) + 33; a85_val /= 85;
157	a85_ptr[0] = (a85_val ) + 33;	178	a85_ptr[0] = (a85_val ) + 33;
158		179
159	a85_ptr += 5;	180	a85_ptr += 5;
160	}	181	}
…		…
183		204
184	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);	205	PerlIO_write (fp, a85_buf, a85_ptr - a85_buf);
185	}	206	}
186		207
187	/////////////////////////////////////////////////////////////////////////////	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	/////////////////////////////////////////////////////////////////////////////
188		303
189	MODULE = Gtk2::CV PACKAGE = Gtk2::CV	304	MODULE = Gtk2::CV PACKAGE = Gtk2::CV
190		305
191	PROTOTYPES: ENABLE	306	PROTOTYPES: ENABLE
192		307
		308	# calculate the common prefix length of two strings
193	# missing function in perl. really :)	309	# missing function in perl. really :)
194	int	310	int
195	common_prefix_length (a, b)	311	common_prefix_length (a, b)
196	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);	312	unsigned char a = (unsigned char )SvPVutf8_nolen ($arg);
197	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);	313	unsigned char b = (unsigned char )SvPVutf8_nolen ($arg);
…		…
206		322
207	OUTPUT:	323	OUTPUT:
208	RETVAL	324	RETVAL
209		325
210	const char *	326	const char *
211	magic (octet_string path)	327	magic (SV *path_or_data)
		328	ALIAS:
		329	magic = 0
		330	magic_mime = 1
		331	magic_buffer = 2
		332	magic_buffer_mime = 3
212	CODE:	333	CODE:
213	{	334	{
214	static magic_t cookie;	335	STRLEN len;
		336	char *data = SvPVbyte (path_or_data, len);
215		337
216	if (!cookie)	338	if (!magic_cookie[0])
		339	{
		340	magic_cookie[0] = magic_open (MAGIC_SYMLINK);
		341	magic_cookie[1] = magic_open (MAGIC_SYMLINK \| MAGIC_MIME_TYPE);
		342	magic_load (magic_cookie[0], 0);
		343	magic_load (magic_cookie[1], 0);
217	{	344	}
218	cookie = magic_open (MAGIC_NONE);
219		345
220	if (cookie)	346	perlinterp_release ();
221	magic_load (cookie, 0);
222	else
223	XSRETURN_UNDEF;
224	}
225		347
226	RETVAL = magic_file (cookie, path);
227	}
228	OUTPUT:
229	RETVAL	348	RETVAL = ix & 2
		349	? magic_buffer (magic_cookie[ix & 1], data, len)
		350	: magic_file (magic_cookie[ix & 1], data);
230		351
231	const char *	352	perlinterp_acquire ();
232	magic_mime (octet_string path)
233	CODE:
234	{
235	static magic_t cookie;
236
237	if (!cookie)
238	{
239	cookie = magic_open (MAGIC_MIME);
240
241	if (cookie)
242	magic_load (cookie, 0);
243	else
244	XSRETURN_UNDEF;
245	}
246
247	RETVAL = magic_file (cookie, path);
248	}	353	}
249	OUTPUT:	354	OUTPUT:
250	RETVAL	355	RETVAL
251		356
252	# missing/broken in Gtk2 perl module	357	# missing/broken in Gtk2 perl module
…		…
268	RETVAL	373	RETVAL
269		374
270	GdkPixbuf_noinc *	375	GdkPixbuf_noinc *
271	dealpha_expose (GdkPixbuf *pb)	376	dealpha_expose (GdkPixbuf *pb)
272	CODE:	377	CODE:
		378	perlinterp_release ();
273	{	379	{
274	int w = gdk_pixbuf_get_width (pb);	380	int w = gdk_pixbuf_get_width (pb);
275	int h = gdk_pixbuf_get_height (pb);	381	int h = gdk_pixbuf_get_height (pb);
276	int bpp = gdk_pixbuf_get_n_channels (pb);	382	int bpp = gdk_pixbuf_get_n_channels (pb);
277	int x, y, i;	383	int x, y, i;
…		…
286	for (x = 0; x < w; x++)	392	for (x = 0; x < w; x++)
287	for (y = 0; y < h; y++)	393	for (y = 0; y < h; y++)
288	for (i = 0; i < 3; i++)	394	for (i = 0; i < 3; i++)
289	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];	395	dst[x * 3 + y * dstr + i] = src[x * bpp + y * sstr + i];
290	}	396	}
		397	perlinterp_acquire ();
291	OUTPUT:	398	OUTPUT:
292	RETVAL	399	RETVAL
293		400
294	GdkPixbuf_noinc *	401	GdkPixbuf_noinc *
295	rotate (GdkPixbuf *pb, int angle)	402	rotate (GdkPixbuf *pb, int angle)
296	CODE:	403	CODE:
		404	perlinterp_release ();
		405	if (angle < 0)
		406	angle += 360;
297	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE	407	RETVAL = gdk_pixbuf_rotate_simple (pb, angle == 0 ? GDK_PIXBUF_ROTATE_NONE
298	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE	408	: angle == 90 ? GDK_PIXBUF_ROTATE_COUNTERCLOCKWISE
299	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN	409	: angle == 180 ? GDK_PIXBUF_ROTATE_UPSIDEDOWN
300	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE	410	: angle == 270 ? GDK_PIXBUF_ROTATE_CLOCKWISE
301	: angle);	411	: angle);
		412	perlinterp_acquire ();
302	OUTPUT:	413	OUTPUT:
303	RETVAL	414	RETVAL
304		415
		416	const char *
		417	filetype (SV *image_data)
		418	CODE:
		419	{
		420	STRLEN data_len;
		421	U8 *data = SvPVbyte (image_data, data_len);
		422	static const unsigned char jxl_header[] = {
		423	0, 0, 0, 0x0c, 0x4a, 0x58, 0x4c, 0x20,
		424	0x0d, 0xa, 0x87, 0x0a, 0, 0, 0, 0x14,
		425	0x66, 0x74, 0x79, 0x70, 0x6a, 0x78, 0x6c, 0x20,
		426	0, 0, 0, 0, 0x6a, 0x78, 0x6c, 0x20,
		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";
		456	else
		457	XSRETURN_UNDEF;
		458	}
		459	OUTPUT:
		460	RETVAL
		461
305	GdkPixbuf_noinc *	462	GdkPixbuf_noinc *
306	load_jpeg (SV *path, int thumbnail=0)	463	decode_webp (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		464	CODE:
		465	{
		466	#if WEBP
		467	STRLEN data_size;
		468	int alpha;
		469	WebPData data;
		470	WebPDemuxer *demux;
		471	WebPIterator iter;
		472	WebPDecoderConfig config;
		473	int inw, inh;
		474
		475	data.bytes = (uint8_t *)SvPVbyte (image_data, data_size);
		476	data.size = data_size;
		477
		478	perlinterp_release ();
		479
		480	RETVAL = 0;
		481
		482	if (!(demux = WebPDemux (&data)))
		483	goto err_demux;
		484
		485	if (!WebPDemuxGetFrame (demux, 1, &iter))
		486	goto err_iter;
		487
		488	if (!WebPInitDecoderConfig (&config))
		489	goto err_iter;
		490
		491	config.options.use_threads = 1;
		492
		493	if (WebPGetFeatures (iter.fragment.bytes, iter.fragment.size, &config.input) != VP8_STATUS_OK)
		494	goto err_iter;
		495
		496	inw = config.input.width;
		497	inh = config.input.height;
		498
		499	if (thumbnail)
		500	{
		501	if (inw * ih > inh * iw)
		502	ih = (iw * inh + inw - 1) / inw;
		503	else
		504	iw = (ih * inw + inh - 1) / inh;
		505
		506	config.options.bypass_filtering = 1;
		507	config.options.no_fancy_upsampling = 1;
		508
		509	config.options.use_scaling = 1;
		510	config.options.scaled_width = iw;
		511	config.options.scaled_height = ih;
		512	}
		513	else
		514	{
		515	iw = inw;
		516	ih = inh;
		517	}
		518
		519	alpha = !!config.input.has_alpha;
		520
		521	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, alpha, 8, iw, ih);
		522	if (!RETVAL)
		523	goto err_iter;
		524
		525	config.output.colorspace = alpha ? MODE_RGBA : MODE_RGB;
		526	config.output.u.RGBA.rgba = gdk_pixbuf_get_pixels (RETVAL);
		527	config.output.u.RGBA.stride = gdk_pixbuf_get_rowstride (RETVAL);
		528	config.output.u.RGBA.size = gdk_pixbuf_get_byte_length (RETVAL);
		529	config.output.is_external_memory = 1;
		530
		531	if (WebPDecode (iter.fragment.bytes, iter.fragment.size, &config) != VP8_STATUS_OK)
		532	{
		533	g_object_unref (RETVAL);
		534	RETVAL = 0;
		535	goto err_iter;
		536	}
		537
		538	err_iter:
		539	WebPDemuxReleaseIterator (&iter);
		540	err_demux:
		541	WebPDemuxDelete (demux);
		542
		543	perlinterp_acquire ();
		544	#else
		545	croak ("load_webp: webp not enabled at compile time");
		546	#endif
		547	}
		548	OUTPUT:
		549	RETVAL
		550
		551	GdkPixbuf_noinc *
		552	decode_jxl (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
		553	CODE:
		554	{
		555	#if JXL
		556	JxlDecoder *dec = JxlDecoderCreate (0);
		557	JxlBasicInfo info;
		558	const uint8_t next_in = (uint8_t )SvPVbyte_nolen (image_data);
		559	size_t avail_in = SvCUR (image_data);
		560	const char *error = 0;
		561	void *runner = 0;
		562	struct bmff_box box;
		563
		564	perlinterp_release ();
		565
		566	RETVAL = 0;
		567
		568	error = "JxlDecoderCreate failed";
		569	if (!dec)
		570	goto done;
		571
		572	runner = JxlThreadParallelRunnerCreate (0, JxlThreadParallelRunnerDefaultNumWorkerThreads ());
		573
		574	error = "JxlDecoderSetParallelRunner failed";
		575	if (JxlDecoderSetParallelRunner (dec, JxlThreadParallelRunner, runner) != JXL_DEC_SUCCESS)
		576	goto done;
		577
		578	error = "JxlDecoderSubscribeEvents failed";
		579	if (JxlDecoderSubscribeEvents (dec, JXL_DEC_FULL_IMAGE \| JXL_DEC_BASIC_INFO) != JXL_DEC_SUCCESS)
		580	goto done;
		581
		582	error = "JxlDecoderSetInput failed";
		583	if (JxlDecoderSetInput (dec, next_in, avail_in) != JXL_DEC_SUCCESS)
		584	goto done;
		585
		586	for (;;)
		587	{
		588	JxlDecoderStatus status = JxlDecoderProcessInput (dec);
		589
		590	printf ("status %d\n",status);
		591
		592	switch (status)
		593	{
		594	case JXL_DEC_ERROR:
		595	error = "JxlDecoderProcessInput failed";
		596	goto done;
		597
		598	case JXL_DEC_NEED_MORE_INPUT:
		599	error = "incomplete file";
		600	goto done;
		601
		602	case JXL_DEC_SUCCESS:
		603	goto done;
		604
		605	case JXL_DEC_NEED_IMAGE_OUT_BUFFER:
		606	{
		607	error = "JxlDecoderGetBasicInfo failed";
		608	if (JxlDecoderGetBasicInfo (dec, &info) != JXL_DEC_SUCCESS)
		609	goto done;
		610
		611	RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, !!info.alpha_bits, 8, info.xsize, info.ysize);
		612	error = "unable to allocate pixbuf";
		613	if (!RETVAL)
		614	goto done;
		615
		616	JxlPixelFormat format = {
		617	info.alpha_bits ? 4 : 3,
		618	JXL_TYPE_UINT8,
		619	JXL_NATIVE_ENDIAN,
		620	gdk_pixbuf_get_rowstride (RETVAL)
		621	};
		622
		623	error = "JxlDecoderSetImageOutBuffer failed";
		624	if (JxlDecoderSetImageOutBuffer (
		625	dec,
		626	&format,
		627	gdk_pixbuf_get_pixels (RETVAL),
		628	gdk_pixbuf_get_byte_length (RETVAL)
		629	) != JXL_DEC_SUCCESS)
		630	goto done;
		631	}
		632	break;
		633
		634	default:
		635	error = "unexpected event";
		636	goto done;
		637	}
		638	}
		639
		640	done:
		641	if (dec)
		642	JxlDecoderDestroy (dec);
		643
		644	if (runner)
		645	JxlThreadParallelRunnerDestroy (runner);
		646
		647	perlinterp_acquire ();
		648
		649	if (error)
		650	{
		651	if (RETVAL)
		652	g_object_unref (RETVAL);
		653
		654	croak ("load_jxl: %s", error);
		655	}
		656	#else
		657	croak ("load_jxl: jpeg-xl not enabled at compile time");
		658	#endif
		659	}
		660	OUTPUT:
		661	RETVAL
		662
		663	GdkPixbuf_noinc *
		664	decode_jpeg (SV *image_data, int thumbnail = 0, int iw = 0, int ih = 0)
307	CODE:	665	CODE:
308	{	666	{
309	struct jpeg_decompress_struct cinfo;	667	struct jpeg_decompress_struct cinfo;
310	struct jpg_err_mgr jerr;	668	struct jpg_err_mgr jerr;
311	guchar *data;
312	int rs;	669	int rs;
313	FILE *fp;
314	volatile GdkPixbuf *pb = 0;	670	volatile GdkPixbuf *pb = 0;
		671	STRLEN data_len;
		672	guchar *data = SvPVbyte (image_data, data_len);
315		673
316	RETVAL = 0;	674	RETVAL = 0;
317		675
318	fp = fopen (SvPVbyte_nolen (path), "rb");	676	perlinterp_release ();
319
320	if (!fp)
321	XSRETURN_UNDEF;
322		677
323	cinfo.err = jpeg_std_error (&jerr.err);	678	cinfo.err = jpeg_std_error (&jerr.err);
324		679
325	jerr.err.error_exit = cv_error_exit;	680	jerr.err.error_exit = cv_error_exit;
326	jerr.err.output_message = cv_error_output;	681	jerr.err.output_message = cv_error_output;
327		682
328	if ((rs = setjmp (jerr.setjmp_buffer)))	683	if ((rs = setjmp (jerr.setjmp_buffer)))
329	{	684	{
330	fclose (fp);
331	jpeg_destroy_decompress (&cinfo);	685	jpeg_destroy_decompress (&cinfo);
332		686
333	if (pb)	687	if (pb)
334	g_object_unref ((gpointer)pb);	688	g_object_unref ((gpointer)pb);
335		689
		690	perlinterp_acquire ();
336	XSRETURN_UNDEF;	691	XSRETURN_UNDEF;
337	}	692	}
338		693
		694	if (!data_len)
		695	longjmp (jerr.setjmp_buffer, 4);
		696
339	jpeg_create_decompress (&cinfo);	697	jpeg_create_decompress (&cinfo);
		698	cv_jpeg_mem_src (&cinfo, data, data_len);
340		699
341	jpeg_stdio_src (&cinfo, fp);
342	jpeg_read_header (&cinfo, TRUE);	700	jpeg_read_header (&cinfo, TRUE);
343		701
344	cinfo.dct_method = JDCT_DEFAULT;	702	cinfo.dct_method = JDCT_DEFAULT;
345	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */	703	cinfo.do_fancy_upsampling = FALSE; /* worse quality, but nobody compained so far, and gdk-pixbuf does the same */
346	cinfo.do_block_smoothing = FALSE;	704	cinfo.do_block_smoothing = FALSE;
…		…
356	{	714	{
357	cinfo.dct_method = JDCT_FASTEST;	715	cinfo.dct_method = JDCT_FASTEST;
358	cinfo.do_fancy_upsampling = FALSE;	716	cinfo.do_fancy_upsampling = FALSE;
359		717
360	while (cinfo.scale_denom < 8	718	while (cinfo.scale_denom < 8
361	&& cinfo.output_width >= IW*4	719	&& cinfo.output_width >= iw*4
362	&& cinfo.output_height >= IH*4)	720	&& cinfo.output_height >= ih*4)
363	{	721	{
364	cinfo.scale_denom <<= 1;	722	cinfo.scale_denom <<= 1;
365	jpeg_calc_output_dimensions (&cinfo);	723	jpeg_calc_output_dimensions (&cinfo);
366	}	724	}
367	}	725	}
368		726
		727	if (cinfo.output_components != 3)
		728	longjmp (jerr.setjmp_buffer, 3);
		729
		730	if (cinfo.jpeg_color_space == JCS_YCCK \|\| cinfo.jpeg_color_space == JCS_CMYK)
		731	{
		732	cinfo.out_color_space = JCS_CMYK;
		733	cinfo.output_components = 4;
		734	}
		735
369	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, 0, 8, cinfo.output_width, cinfo.output_height);	736	pb = RETVAL = gdk_pixbuf_new (GDK_COLORSPACE_RGB, cinfo.output_components == 4, 8, cinfo.output_width, cinfo.output_height);
370	if (!RETVAL)	737	if (!RETVAL)
371	longjmp (jerr.setjmp_buffer, 2);	738	longjmp (jerr.setjmp_buffer, 2);
372		739
373	data = gdk_pixbuf_get_pixels (RETVAL);	740	data = gdk_pixbuf_get_pixels (RETVAL);
374	rs = gdk_pixbuf_get_rowstride (RETVAL);	741	rs = gdk_pixbuf_get_rowstride (RETVAL);
375
376	if (cinfo.output_components != 3)
377	longjmp (jerr.setjmp_buffer, 3);
378		742
379	jpeg_start_decompress (&cinfo);	743	jpeg_start_decompress (&cinfo);
380		744
381	while (cinfo.output_scanline < cinfo.output_height)	745	while (cinfo.output_scanline < cinfo.output_height)
382	{	746	{
…		…
389	rp [3] = (guchar *)rp [2] + rs;	753	rp [3] = (guchar *)rp [2] + rs;
390		754
391	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);	755	jpeg_read_scanlines (&cinfo, rp, remaining < 4 ? remaining : 4);
392	}	756	}
393		757
		758	if (cinfo.out_color_space == JCS_CMYK)
		759	{
		760	guchar end = data + cinfo.output_height rs;
		761
		762	while (data < end)
		763	{
		764	U32 c = data [0];
		765	U32 m = data [1];
		766	U32 y = data [2];
		767	U32 k = data [3];
		768
		769	if (0)
		770	if (cinfo.Adobe_transform == 2)
		771	{
		772	c ^= 0xff;
		773	m ^= 0xff;
		774	y ^= 0xff;
		775	k ^= 0xff;
		776	}
		777
		778	data [0] = (c * k + 0x80) / 0xff;
		779	data [1] = (m * k + 0x80) / 0xff;
		780	data [2] = (y * k + 0x80) / 0xff;
		781	data [3] = 0xff;
		782
		783	data += 4;
		784	}
		785	}
		786
394	jpeg_finish_decompress (&cinfo);	787	jpeg_finish_decompress (&cinfo);
395	fclose (fp);
396	jpeg_destroy_decompress (&cinfo);	788	jpeg_destroy_decompress (&cinfo);
		789	perlinterp_acquire ();
397	}	790	}
398	OUTPUT:	791	OUTPUT:
399	RETVAL	792	RETVAL
400		793
401	void	794	void
402	compare (GdkPixbuf a, GdkPixbuf b)	795	compare (GdkPixbuf a, GdkPixbuf b)
403	PPCODE:	796	PPCODE:
		797	perlinterp_release ();
404	{	798	{
405	int w = gdk_pixbuf_get_width (a);	799	int w = gdk_pixbuf_get_width (a);
406	int h = gdk_pixbuf_get_height (a);	800	int h = gdk_pixbuf_get_height (a);
407		801
408	int sa = gdk_pixbuf_get_rowstride (a);	802	int sa = gdk_pixbuf_get_rowstride (a);
…		…
435	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));	829	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
436	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));	830	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
437	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));	831	d = ((int)pa_++) - ((int)pb_++); diff += d*d; peak = MAX (peak, abs (d));
438	}	832	}
439	}	833	}
		834
		835	perlinterp_acquire ();
440		836
441	EXTEND (SP, 2);	837	EXTEND (SP, 2);
442	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));	838	PUSHs (sv_2mortal (newSVnv (sqrt (diff / (w * h * 3. * 255. * 255.)))));
443	PUSHs (sv_2mortal (newSVnv (peak / 255.)));	839	PUSHs (sv_2mortal (newSVnv (peak / 255.)));
444	}	840	}

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Comparing CV/CV.xs (file contents): Revision 1.43 by root, Sun May 3 08:16:47 2009 UTC vs. Revision 1.59 by root, Sat Apr 10 03:32:09 2021 UTC

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Comparing CV/CV.xs (file contents):
Revision 1.43 by root, Sun May 3 08:16:47 2009 UTC vs.
Revision 1.59 by root, Sat Apr 10 03:32:09 2021 UTC