[ViewVC] Diff of: cvs/rxvt-unicode/src/rxvtimg.C

Comparing rxvt-unicode/src/rxvtimg.C (file contents):
Revision 1.30 by root, Wed Jun 6 22:01:44 2012 UTC vs.
Revision 1.107 by root, Thu May 22 18:54:33 2014 UTC

…		…
		1	/----------------------------------------------------------------------
		2	* File: rxvtimg.C
		3	----------------------------------------------------------------------
		4	*
		5	* All portions of code are copyright by their respective author/s.
		6	* Copyright (c) 2012 Marc Lehmann <schmorp@schmorp.de>
		7	* Copyright (c) 2012 Emanuele Giaquinta <e.giaquinta@glauco.it>
		8	*
		9	* This program is free software; you can redistribute it and/or modify
		10	* it under the terms of the GNU General Public License as published by
		11	* the Free Software Foundation; either version 3 of the License, or
		12	* (at your option) any later version.
		13	*
		14	* This program is distributed in the hope that it will be useful,
		15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
		16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
		17	* GNU General Public License for more details.
		18	*
		19	* You should have received a copy of the GNU General Public License
		20	* along with this program; if not, write to the Free Software
		21	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
		22	---------------------------------------------------------------------/
		23
		24	#include <string.h>
1	#include <math.h>	25	#include <math.h>
2	#include "../config.h"	26	#include "../config.h"
3	#include "rxvt.h"	27	#include "rxvt.h"
4		28
5	#if HAVE_IMG	29	#if HAVE_IMG
6		30
7	#define float_to_component(d) ((d) * 65535.99)	31	typedef rxvt_img::nv nv;
8		32
		33	namespace
		34	{
		35	struct mat3x3
		36	{
		37	nv v[3][3];
		38
		39	mat3x3 ()
		40	{
		41	}
		42
		43	mat3x3 (const nv *matrix)
		44	{
		45	memcpy (v, matrix, sizeof (v));
		46	}
		47
		48	mat3x3 (nv v11, nv v12, nv v13, nv v21, nv v22, nv v23, nv v31, nv v32, nv v33)
		49	{
		50	v[0][0] = v11; v[0][1] = v12; v[0][2] = v13;
		51	v[1][0] = v21; v[1][1] = v22; v[1][2] = v23;
		52	v[2][0] = v31; v[2][1] = v32; v[2][2] = v33;
		53	}
		54
		55	mat3x3 inverse ();
		56
		57	nv *operator [](int i) { return &v[i][0]; }
		58	const nv *operator [](int i) const { return &v[i][0]; }
		59
		60	operator const nv * () const { return &v[0][0]; }
		61	operator nv * () { return &v[0][0]; }
		62
		63	// quite inefficient, hopefully gcc pulls the w calc out of any loops
		64	nv apply1 (int i, nv x, nv y)
		65	{
		66	mat3x3 &m = *this;
		67
		68	nv v = m[i][0] * x + m[i][1] * y + m[i][2];
		69	nv w = m[2][0] * x + m[2][1] * y + m[2][2];
		70
		71	return v * (1. / w);
		72	}
		73
		74	static mat3x3 translate (nv x, nv y);
		75	static mat3x3 scale (nv s, nv t);
		76	static mat3x3 rotate (nv phi);
		77	};
		78
		79	mat3x3
		80	mat3x3::inverse ()
		81	{
		82	mat3x3 &m = *this;
		83	mat3x3 inv;
		84
		85	nv s0 = m[2][2] * m[1][1] - m[2][1] * m[1][2];
		86	nv s1 = m[2][1] * m[0][2] - m[2][2] * m[0][1];
		87	nv s2 = m[1][2] * m[0][1] - m[1][1] * m[0][2];
		88
		89	nv invdet = 1. / (m[0][0] * s0 + m[1][0] * s1 + m[2][0] * s2);
		90
		91	inv[0][0] = invdet * s0;
		92	inv[0][1] = invdet * s1;
		93	inv[0][2] = invdet * s2;
		94
		95	inv[1][0] = invdet * (m[2][0] * m[1][2] - m[2][2] * m[1][0]);
		96	inv[1][1] = invdet * (m[2][2] * m[0][0] - m[2][0] * m[0][2]);
		97	inv[1][2] = invdet * (m[1][0] * m[0][2] - m[1][2] * m[0][0]);
		98
		99	inv[2][0] = invdet * (m[2][1] * m[1][0] - m[2][0] * m[1][1]);
		100	inv[2][1] = invdet * (m[2][0] * m[0][1] - m[2][1] * m[0][0]);
		101	inv[2][2] = invdet * (m[1][1] * m[0][0] - m[1][0] * m[0][1]);
		102
		103	return inv;
		104	}
		105
		106	static mat3x3
		107	operator *(const mat3x3 &a, const mat3x3 &b)
		108	{
		109	mat3x3 r;
		110
		111	for (int i = 0; i < 3; ++i)
		112	for (int j = 0; j < 3; ++j)
		113	r[i][j] = a[i][0] * b[0][j]
		114	+ a[i][1] * b[1][j]
		115	+ a[i][2] * b[2][j];
		116
		117	return r;
		118	}
		119
		120	mat3x3
		121	mat3x3::translate (nv x, nv y)
		122	{
		123	return mat3x3 (
		124	1, 0, x,
		125	0, 1, y,
		126	0, 0, 1
		127	);
		128	}
		129
		130	mat3x3
		131	mat3x3::scale (nv s, nv t)
		132	{
		133	return mat3x3 (
		134	s, 0, 0,
		135	0, t, 0,
		136	0, 0, 1
		137	);
		138	}
		139
		140	// clockwise
		141	mat3x3
		142	mat3x3::rotate (nv phi)
		143	{
		144	nv s = sin (phi);
		145	nv c = cos (phi);
		146
		147	return mat3x3 (
		148	c, -s, 0,
		149	s, c, 0,
		150	0, 0, 1
		151	);
		152	}
		153
		154	struct composer
		155	{
		156	rxvt_img srcimg, dstimg;
		157	Picture src, dst, msk;
		158	Display *dpy;
		159
		160	ecb_noinline
		161	composer (rxvt_img srcimg, rxvt_img dstimg = 0)
		162	: srcimg (srcimg), dstimg (dstimg), msk (0)
		163	{
		164	if (!this->dstimg)
		165	this->dstimg = srcimg->new_empty ();
		166	else if (!this->dstimg->pm) // somewhat unsatisfying
		167	this->dstimg->alloc ();
		168
		169	dpy = srcimg->s->dpy;
		170	src = srcimg->picture ();
		171	dst = this->dstimg->picture ();
		172	}
		173
		174	ecb_noinline
		175	void mask (bool rgb = true, int w = 1, int h = 1)
		176	{
		177	Pixmap pixmap = XCreatePixmap (dpy, srcimg->pm, w, h, rgb ? 32 : 8);
		178
		179	XRenderPictFormat *format = XRenderFindStandardFormat (dpy, rgb ? PictStandardARGB32 : PictStandardA8);
		180	XRenderPictureAttributes pa;
		181	pa.repeat = RepeatNormal;
		182	pa.component_alpha = rgb;
		183	msk = XRenderCreatePicture (dpy, pixmap, format, CPRepeat \| CPComponentAlpha, &pa);
		184
		185	XFreePixmap (dpy, pixmap);
		186
		187	ecb_assume (msk);
		188	}
		189
		190	// CreateSolidFill creates a very very very weird picture
		191	void mask (const rgba &c)
		192	{
		193	XRenderColor rc = {
		194	c.r * c.a / 65535,
		195	c.g * c.a / 65535,
		196	c.b * c.a / 65535,
		197	c.a
		198	};
		199	msk = XRenderCreateSolidFill (dpy, &rc);
		200	ecb_assume (msk);
		201	}
		202
		203	void fill (const rgba &c)
		204	{
		205	XRenderColor rc = {
		206	c.r * c.a / 65535,
		207	c.g * c.a / 65535,
		208	c.b * c.a / 65535,
		209	c.a
		210	};
		211
		212	XRenderFillRectangle (dpy, PictOpSrc, msk, &rc, 0, 0, 1, 1);
		213	}
		214
		215	operator rxvt_img *()
		216	{
		217	return dstimg;
		218	}
		219
		220	ecb_noinline
		221	~composer ()
		222	{
		223	XRenderFreePicture (dpy, src);
		224	XRenderFreePicture (dpy, dst);
		225	if (msk) XRenderFreePicture (dpy, msk);
		226	}
		227	};
		228	}
		229
		230	static XRenderPictFormat *
		231	find_alpha_format_for (Display dpy, XRenderPictFormat format)
		232	{
		233	if (format->direct.alphaMask)
		234	return format; // already has alpha
		235
		236	// try to find a suitable alpha format, one bit alpha is enough for our purposes
		237	if (format->type == PictTypeDirect)
		238	for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
		239	if (f->direct.alphaMask
		240	&& f->type == PictTypeDirect
		241	&& ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
		242	&& ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
		243	&& ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
		244	return f;
		245
		246	// should be a very good fallback
		247	return XRenderFindStandardFormat (dpy, PictStandardARGB32);
		248	}
		249
9	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height)	250	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int x, int y, int width, int height, int repeat)
10	: s(screen), x(0), y(0), w(width), h(height), format(format), repeat(RepeatNormal), shared(false)	251	: s(screen), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
		252	pm(0), ref(0)
11	{	253	{
12	pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
13	}	254	}
14		255
15	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height, Pixmap pixmap)	256	rxvt_img::rxvt_img (const rxvt_img &img)
16	: s(screen), x(0), y(0), w(width), h(height), format(format), repeat(RepeatNormal), shared(false), pm(pixmap)	257	: s(img.s), x(img.x), y(img.y), w(img.w), h(img.h), format(img.format), repeat(img.repeat), pm(img.pm), ref(img.ref)
17	{	258	{
		259	++ref->cnt;
18	}	260	}
19		261
20	rxvt_img *	262	rxvt_img *
21	rxvt_img::new_from_root (rxvt_screen *s)	263	rxvt_img::new_from_root (rxvt_screen *s)
22	{	264	{
23	Display *dpy = s->display->dpy;	265	Display *dpy = s->dpy;
24	unsigned int root_pm_w, root_pm_h;	266	unsigned int root_pm_w, root_pm_h;
25	Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_XROOTPMAP_ID]);	267	Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa [XA_XROOTPMAP_ID]);
26	if (root_pixmap == None)	268	if (root_pixmap == None)
27	root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_ESETROOT_PMAP_ID]);	269	root_pixmap = s->display->get_pixmap_property (s->display->xa [XA_ESETROOT_PMAP_ID]);
28		270
29	if (root_pixmap == None)	271	if (root_pixmap == None)
30	return 0;	272	return 0;
31		273
32	Window wdummy;	274	Window wdummy;
37	return 0;	279	return 0;
38		280
39	rxvt_img *img = new rxvt_img (	281	rxvt_img *img = new rxvt_img (
40	s,	282	s,
41	XRenderFindVisualFormat (dpy, DefaultVisual (dpy, s->display->screen)),	283	XRenderFindVisualFormat (dpy, DefaultVisual (dpy, s->display->screen)),
		284	0,
		285	0,
42	root_pm_w,	286	root_pm_w,
43	root_pm_h,	287	root_pm_h
44	root_pixmap
45	);	288	);
46		289
47	img->shared = true;	290	img->pm = root_pixmap;
		291	img->ref = new pixref (root_pm_w, root_pm_h);
		292	img->ref->ours = false;
		293
		294	return img;
		295	}
		296
		297	# if HAVE_PIXBUF
		298
		299	rxvt_img *
		300	rxvt_img::new_from_pixbuf (rxvt_screen s, GdkPixbuf pb)
		301	{
		302	Display *dpy = s->dpy;
		303
		304	int width = gdk_pixbuf_get_width (pb);
		305	int height = gdk_pixbuf_get_height (pb);
		306
		307	if (width > 32767 \|\| height > 32767) // well, we could upload in chunks
		308	rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
		309
		310	// since we require rgb24/argb32 formats from xrender we assume
		311	// that both 24 and 32 bpp MUST be supported by any screen that supports xrender
		312
		313	int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
		314
		315	XImage xi;
		316
		317	xi.width = width;
		318	xi.height = height;
		319	xi.xoffset = 0;
		320	xi.format = ZPixmap;
		321	xi.byte_order = ImageByteOrder (dpy);
		322	xi.bitmap_unit = 0; //XY only, unused
		323	xi.bitmap_bit_order = 0; //XY only, unused
		324	xi.bitmap_pad = BitmapPad (dpy);
		325	xi.depth = 32;
		326	xi.bytes_per_line = 0;
		327	xi.bits_per_pixel = 32; //Z only
		328	xi.red_mask = 0x00000000; //Z only, unused
		329	xi.green_mask = 0x00000000; //Z only, unused
		330	xi.blue_mask = 0x00000000; //Z only, unused
		331	xi.obdata = 0; // probably unused
		332
		333	bool byte_order_mismatch = byte_order != xi.byte_order;
		334
		335	if (!XInitImage (&xi))
		336	rxvt_fatal ("unable to initialise ximage, please report.\n");
		337
		338	if (height > INT_MAX / xi.bytes_per_line)
		339	rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
		340
		341	xi.data = (char )rxvt_malloc (height xi.bytes_per_line);
		342
		343	int rowstride = gdk_pixbuf_get_rowstride (pb);
		344	bool pb_has_alpha = gdk_pixbuf_get_has_alpha (pb);
		345	unsigned char *row = gdk_pixbuf_get_pixels (pb);
		346
		347	char *line = xi.data;
		348
		349	for (int y = 0; y < height; y++)
		350	{
		351	unsigned char *src = row;
		352	uint32_t dst = (uint32_t )line;
		353
		354	for (int x = 0; x < width; x++)
		355	{
		356	uint8_t r = *src++;
		357	uint8_t g = *src++;
		358	uint8_t b = *src++;
		359	uint8_t a = *src;
		360
		361	// this is done so it can be jump-free, but newer gcc's clone inner the loop
		362	a = pb_has_alpha ? a : 255;
		363	src += pb_has_alpha;
		364
		365	r = (r * a + 127) / 255;
		366	g = (g * a + 127) / 255;
		367	b = (b * a + 127) / 255;
		368
		369	uint32_t v = (a << 24) \| (r << 16) \| (g << 8) \| b;
		370
		371	if (ecb_big_endian () ? !byte_order_mismatch : byte_order_mismatch)
		372	v = ecb_bswap32 (v);
		373
		374	*dst++ = v;
		375	}
		376
		377	row += rowstride;
		378	line += xi.bytes_per_line;
		379	}
		380
		381	rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, PictStandardARGB32), 0, 0, width, height);
		382	img->alloc ();
		383
		384	GC gc = XCreateGC (dpy, img->pm, 0, 0);
		385	XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
		386	XFreeGC (dpy, gc);
		387
		388	free (xi.data);
48		389
49	return img;	390	return img;
50	}	391	}
51		392
52	rxvt_img *	393	rxvt_img *
…		…
56	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);	397	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
57		398
58	if (!pb)	399	if (!pb)
59	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);	400	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
60		401
61	rxvt_img *img = new rxvt_img (	402	rxvt_img *img = new_from_pixbuf (s, pb);
62	s,
63	XRenderFindStandardFormat (s->display->dpy, gdk_pixbuf_get_has_alpha (pb) ? PictStandardARGB32 : PictStandardRGB24),
64	gdk_pixbuf_get_width (pb),
65	gdk_pixbuf_get_height (pb)
66	);
67
68	img->render_pixbuf (pb, 0, 0, img->w, img->h, 0, 0);
69		403
70	g_object_unref (pb);	404	g_object_unref (pb);
71		405
72	return img;	406	return img;
73	}	407	}
74		408
		409	# endif
		410
		411	void
		412	rxvt_img::destroy ()
		413	{
		414	if (--ref->cnt)
		415	return;
		416
		417	if (pm && ref->ours)
		418	XFreePixmap (s->dpy, pm);
		419
		420	delete ref;
		421	}
		422
75	rxvt_img::~rxvt_img ()	423	rxvt_img::~rxvt_img ()
76	{	424	{
77	if (!shared)	425	destroy ();
78	XFreePixmap (s->display->dpy, pm);	426	}
		427
		428	void
		429	rxvt_img::alloc ()
		430	{
		431	pm = XCreatePixmap (s->dpy, s->display->root, w, h, format->depth);
		432	ref = new pixref (w, h);
		433	}
		434
		435	rxvt_img *
		436	rxvt_img::new_empty ()
		437	{
		438	rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
		439	img->alloc ();
		440
		441	return img;
		442	}
		443
		444	Picture
		445	rxvt_img::picture ()
		446	{
		447	Display *dpy = s->dpy;
		448
		449	XRenderPictureAttributes pa;
		450	pa.repeat = repeat;
		451	Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
		452
		453	return pic;
79	}	454	}
80		455
81	void	456	void
82	rxvt_img::unshare ()	457	rxvt_img::unshare ()
83	{	458	{
84	if (!shared)	459	if (ref->cnt == 1 && ref->ours)
85	return;	460	return;
86		461
		462	Pixmap pm2 = XCreatePixmap (s->dpy, s->display->root, ref->w, ref->h, format->depth);
		463	GC gc = XCreateGC (s->dpy, pm, 0, 0);
		464	XCopyArea (s->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
		465	XFreeGC (s->dpy, gc);
		466
		467	destroy ();
		468
		469	pm = pm2;
		470	ref = new pixref (ref->w, ref->h);
		471	}
		472
		473	void
		474	rxvt_img::fill (const rgba &c, int x, int y, int w, int h)
		475	{
		476	XRenderColor rc = { c.r, c.g, c.b, c.a };
		477
		478	Display *dpy = s->dpy;
		479	Picture src = picture ();
		480	XRenderFillRectangle (dpy, PictOpSrc, src, &rc, x, y, w, h);
		481	XRenderFreePicture (dpy, src);
		482	}
		483
		484	void
		485	rxvt_img::fill (const rgba &c)
		486	{
		487	fill (c, 0, 0, w, h);
		488	}
		489
		490	void
		491	rxvt_img::add_alpha ()
		492	{
		493	if (format->direct.alphaMask)
		494	return;
		495
		496	composer cc (this, new rxvt_img (s, find_alpha_format_for (s->dpy, format), x, y, w, h, repeat));
		497
		498	XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
		499
87	rxvt_img *img = clone ();	500	rxvt_img *img = cc;
88		501
89	::swap (pm , img->pm);	502	::swap (img->ref, ref);
90	::swap (shared, img->shared);	503	::swap (img->pm , pm );
91		504
92	delete img;	505	delete img;
93	}	506	}
94		507
95	void
96	rxvt_img::fill (const rxvt_color &c)
97	{
98	XGCValues gcv;
99	gcv.foreground = c;
100	GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);
101	XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);
102	XFreeGC (s->display->dpy, gc);
103	}
104
105	static void	508	static void
106	get_gaussian_kernel (int radius, int width, double kernel, XFixed params)	509	get_gaussian_kernel (int radius, int width, nv kernel, XFixed params)
107	{	510	{
108	double sigma = radius / 2.0;	511	nv sigma = radius / 2.0;
109	double scale = sqrt (2.0 * M_PI) * sigma;	512	nv scale = sqrt (2.0 * M_PI) * sigma;
110	double sum = 0.0;	513	nv sum = 0.0;
111		514
112	for (int i = 0; i < width; i++)	515	for (int i = 0; i < width; i++)
113	{	516	{
114	double x = i - width / 2;	517	nv x = i - width / 2;
115	kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;	518	kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
116	sum += kernel[i];	519	sum += kernel[i];
117	}	520	}
118		521
119	params[0] = XDoubleToFixed (width);	522	params[0] = XDoubleToFixed (width);
…		…
127	rxvt_img::blur (int rh, int rv)	530	rxvt_img::blur (int rh, int rv)
128	{	531	{
129	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))	532	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
130	return clone ();	533	return clone ();
131		534
132	Display *dpy = s->display->dpy;	535	Display *dpy = s->dpy;
133	int size = max (rh, rv) * 2 + 1;	536	int size = max (rh, rv) * 2 + 1;
134	double kernel = (double )malloc (size * sizeof (double));	537	nv kernel = (nv )malloc (size * sizeof (nv));
135	XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));	538	XFixed *params = rxvt_temp_buf<XFixed> (size + 2);
136	rxvt_img *img = new rxvt_img (s, format, w, h);	539	rxvt_img *img = new_empty ();
137		540
138	XRenderPictureAttributes pa;	541	XRenderPictureAttributes pa;
139
140	pa.repeat = RepeatPad;	542	pa.repeat = RepeatPad;
141	Picture src = XRenderCreatePicture (dpy, pm , format, CPRepeat, &pa);	543	Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
142	Picture dst = XRenderCreatePicture (dpy, img->pm, format, CPRepeat, &pa);	544	Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
143		545
144	Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);	546	Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
145	Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);	547	Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
146	XFreePixmap (dpy, tmp_pm);	548	XFreePixmap (dpy, tmp_pm);
147		549
…		…
163		565
164	size = rv * 2 + 1;	566	size = rv * 2 + 1;
165	get_gaussian_kernel (rv, size, kernel, params);	567	get_gaussian_kernel (rv, size, kernel, params);
166	::swap (params[0], params[1]);	568	::swap (params[0], params[1]);
167		569
168	XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);	570	XRenderSetPictureFilter (dpy, tmp, FilterConvolution, params, size+2);
169	XRenderComposite (dpy,	571	XRenderComposite (dpy,
170	PictOpSrc,	572	PictOpSrc,
171	tmp,	573	tmp,
172	None,	574	None,
173	dst,	575	dst,
…		…
176	0, 0,	578	0, 0,
177	w, h);	579	w, h);
178	}	580	}
179		581
180	free (kernel);	582	free (kernel);
181	free (params);	583
182	XRenderFreePicture (dpy, src);	584	XRenderFreePicture (dpy, src);
183	XRenderFreePicture (dpy, dst);	585	XRenderFreePicture (dpy, dst);
184	XRenderFreePicture (dpy, tmp);	586	XRenderFreePicture (dpy, tmp);
185		587
186	return img;	588	return img;
187	}	589	}
188		590
189	static Picture	591	rxvt_img *
190	create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)	592	rxvt_img::muladd (nv mul, nv add)
191	{	593	{
192	Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);	594	// STEP 1: double the image width, fill all odd columns with white (==1)
193		595
194	XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);	596	composer cc (this, new rxvt_img (s, format, 0, 0, w * 2, h, repeat));
195	XRenderPictureAttributes pa;
196	pa.repeat = True;
197	Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
198		597
199	XFreePixmap (dpy, pixmap);	598	// why the hell does XRenderSetPictureTransform want a writable matrix :(
		599	// that keeps us from just static const'ing this matrix.
		600	XTransform h_double = {
		601	0x08000, 0, 0,
		602	0, 0x10000, 0,
		603	0, 0, 0x10000
		604	};
200		605
201	return mask;	606	XRenderSetPictureFilter (cc.dpy, cc.src, "nearest", 0, 0);
		607	XRenderSetPictureTransform (cc.dpy, cc.src, &h_double);
		608	XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
		609
		610	cc.mask (false, 2, 1);
		611
		612	static const XRenderColor c0 = { 0, 0, 0, 0 };
		613	XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &c0, 0, 0, 1, 1);
		614	static const XRenderColor c1 = { 65535, 65535, 65535, 65535 };
		615	XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &c1, 1, 0, 1, 1);
		616
		617	Picture white = XRenderCreateSolidFill (cc.dpy, &c1);
		618
		619	XRenderComposite (cc.dpy, PictOpOver, white, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
		620
		621	XRenderFreePicture (cc.dpy, white);
		622
		623	// STEP 2: convolve the image with a 3x1 filter
		624	// a 2x1 filter would obviously suffice, but given the total lack of specification
		625	// for xrender, I expect different xrender implementations to randomly diverge.
		626	// we also halve the image, and hope for the best (again, for lack of specs).
		627	composer cc2 (cc.dstimg);
		628
		629	XFixed kernel [] = {
		630	XDoubleToFixed (3), XDoubleToFixed (1),
		631	XDoubleToFixed (0), XDoubleToFixed (mul), XDoubleToFixed (add)
		632	};
		633
		634	XTransform h_halve = {
		635	0x20000, 0, 0,
		636	0, 0x10000, 0,
		637	0, 0, 0x10000
		638	};
		639
		640	XRenderSetPictureFilter (cc.dpy, cc2.src, "nearest", 0, 0);
		641	XRenderSetPictureTransform (cc.dpy, cc2.src, &h_halve);
		642	XRenderSetPictureFilter (cc.dpy, cc2.src, FilterConvolution, kernel, ecb_array_length (kernel));
		643
		644	XRenderComposite (cc.dpy, PictOpSrc, cc2.src, None, cc2.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
		645
		646	return cc2;
		647	}
		648
		649	ecb_noinline static void
		650	extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc)
		651	{
		652	int32_t x = clamp (c, cl0, cl1);
		653	c -= x;
		654	xc = x;
		655	}
		656
		657	ecb_noinline static bool
		658	extract (int32_t cl0, int32_t cl1, int32_t &r, int32_t &g, int32_t &b, int32_t &a, unsigned short &xr, unsigned short &xg, unsigned short &xb, unsigned short &xa)
		659	{
		660	extract (cl0, cl1, r, xr);
		661	extract (cl0, cl1, g, xg);
		662	extract (cl0, cl1, b, xb);
		663	extract (cl0, cl1, a, xa);
		664
		665	return xr \| xg \| xb \| xa;
202	}	666	}
203		667
204	void	668	void
205	rxvt_img::brightness (double r, double g, double b, double a)	669	rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a)
206	{	670	{
		671	unshare ();
		672
207	Display *dpy = s->display->dpy;	673	Display *dpy = s->dpy;
208	Picture src = create_xrender_mask (dpy, pm, True);
209	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);	674	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
210		675
		676	// loop should not be needed for brightness, as only -1..1 makes sense
		677	//while (r \| g \| b \| a)
		678	{
		679	unsigned short xr, xg, xb, xa;
211	XRenderColor mask_c;	680	XRenderColor mask_c;
212	mask_c.red = float_to_component (r);	681
213	mask_c.green = float_to_component (g);	682	if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
214	mask_c.blue = float_to_component (b);
215	mask_c.alpha = float_to_component (a);
216	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);	683	XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
217		684
218	XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);	685	if (extract (-65535, 0, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
		686	{
		687	XRenderColor mask_w = { 65535, 65535, 65535, 65535 };
		688	XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
		689	mask_c.red = -mask_c.red; //TODO: verify that doing clamp, assign, and negation does the right thing
		690	mask_c.green = -mask_c.green;
		691	mask_c.blue = -mask_c.blue;
		692	mask_c.alpha = -mask_c.alpha;
		693	XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
		694	XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
		695	}
		696	}
219		697
220	XRenderFreePicture (dpy, src);
221	XRenderFreePicture (dpy, dst);	698	XRenderFreePicture (dpy, dst);
222	}	699	}
223		700
224	void	701	void
225	rxvt_img::contrast (double r, double g, double b, double a)	702	rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a)
226	{	703	{
227	if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))	704	if (r < 0 \|\| g < 0 \|\| b < 0 \|\| a < 0)
228	return;	705	rxvt_fatal ("rxvt_img::contrast does not support negative values.\n");
229		706
230	Display *dpy = s->display->dpy;	707	// premultiply (yeah, these are not exact, sue me or fix it)
231	Picture src = create_xrender_mask (dpy, pm, True);	708	r = (r * (a >> 8)) >> 8;
232	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);	709	g = (g * (a >> 8)) >> 8;
		710	b = (b * (a >> 8)) >> 8;
233		711
		712	composer cc (this);
		713	rxvt_img *img = cc;
		714	img->fill (rgba (0, 0, 0, 0));
		715
		716	cc.mask (true);
		717
		718	//TODO: this operator does not yet implement some useful contrast
		719	while (r \| g \| b \| a)
		720	{
		721	unsigned short xr, xg, xb, xa;
234	XRenderColor mask_c;	722	XRenderColor mask_c;
235	mask_c.red = float_to_component (r);
236	mask_c.green = float_to_component (g);
237	mask_c.blue = float_to_component (b);
238	mask_c.alpha = float_to_component (a);
239	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
240		723
241	XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);	724	if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
242
243	XRenderFreePicture (dpy, src);
244	XRenderFreePicture (dpy, dst);
245	}
246
247	bool
248	rxvt_img::render_pixbuf (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y)
249	{
250	Display *dpy = s->display->dpy;
251
252	if (s->visual->c_class != TrueColor)
253	return false;
254
255	uint32_t red_mask, green_mask, blue_mask, alpha_mask;
256
257	red_mask = (uint32_t)format->direct.redMask << format->direct.red;
258	green_mask = (uint32_t)format->direct.greenMask << format->direct.green;
259	blue_mask = (uint32_t)format->direct.blueMask << format->direct.blue;
260	alpha_mask = (uint32_t)format->direct.alphaMask << format->direct.alpha;
261
262	int width_r = ecb_popcount32 (red_mask);
263	int width_g = ecb_popcount32 (green_mask);
264	int width_b = ecb_popcount32 (blue_mask);
265	int width_a = ecb_popcount32 (alpha_mask);
266
267	if (width_r > 8 \|\| width_g > 8 \|\| width_b > 8 \|\| width_a > 8)
268	return false;
269
270	int sh_r = ecb_ctz32 (red_mask);
271	int sh_g = ecb_ctz32 (green_mask);
272	int sh_b = ecb_ctz32 (blue_mask);
273	int sh_a = ecb_ctz32 (alpha_mask);
274
275	if (width > 32767 \|\| height > 32767)
276	return false;
277
278	XImage *ximage = XCreateImage (dpy, s->visual, format->depth, ZPixmap, 0, 0,
279	width, height, 32, 0);
280	if (!ximage)
281	return false;
282
283	if (height > INT_MAX / ximage->bytes_per_line
284	\|\| !(ximage->data = (char )malloc (height ximage->bytes_per_line)))
285	{
286	XDestroyImage (ximage);
287	return false;
288	}
289
290	GC gc = XCreateGC (dpy, pm, 0, 0);
291
292	ximage->byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
293
294	int rowstride = gdk_pixbuf_get_rowstride (pixbuf);
295	int channels = gdk_pixbuf_get_n_channels (pixbuf);
296	unsigned char row = gdk_pixbuf_get_pixels (pixbuf) + src_y rowstride + src_x * channels;
297	char *line = ximage->data;
298
299	for (int y = 0; y < height; y++)
300	{
301	for (int x = 0; x < width; x++)
302	{	725	{
303	unsigned char pixel = row + x channels;	726	XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &mask_c, 0, 0, 1, 1);
304	uint32_t value;	727	XRenderComposite (cc.dpy, PictOpAdd, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
305	unsigned char r, g, b, a;
306
307	if (channels == 4)
308	{
309	a = pixel[3];
310	r = pixel[0] * a / 0xff;
311	g = pixel[1] * a / 0xff;
312	b = pixel[2] * a / 0xff;
313	}
314	else
315	{
316	a = 0xff;
317	r = pixel[0];
318	g = pixel[1];
319	b = pixel[2];
320	}
321
322	value = ((r >> (8 - width_r)) << sh_r)
323	\| ((g >> (8 - width_g)) << sh_g)
324	\| ((b >> (8 - width_b)) << sh_b)
325	\| ((a >> (8 - width_a)) << sh_a);
326
327	if (ximage->bits_per_pixel == 32)
328	((uint32_t *)line)[x] = value;
329	else
330	XPutPixel (ximage, x, y, value);
331	}	728	}
332
333	row += rowstride;
334	line += ximage->bytes_per_line;
335	}	729	}
336		730
337	XPutImage (dpy, pm, gc, ximage, 0, 0, dst_x, dst_y, width, height);	731	::swap (img->ref, ref);
338	XDestroyImage (ximage);	732	::swap (img->pm , pm );
339	XFreeGC (dpy, gc);
340		733
341	return true;	734	delete img;
		735	}
		736
		737	void
		738	rxvt_img::draw (rxvt_img *img, int op, nv mask)
		739	{
		740	unshare ();
		741
		742	composer cc (img, this);
		743
		744	if (mask != 1.)
		745	cc.mask (rgba (0, 0, 0, float_to_component (mask)));
		746
		747	XRenderComposite (cc.dpy, op, cc.src, cc.msk, cc.dst, x - img->x, y - img->y, 0, 0, 0, 0, w, h);
342	}	748	}
343		749
344	rxvt_img *	750	rxvt_img *
345	rxvt_img::clone ()	751	rxvt_img::clone ()
346	{	752	{
347	rxvt_img *img = new rxvt_img (s, format, w, h);	753	return new rxvt_img (*this);
		754	}
348		755
349	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);	756	rxvt_img *
350	XCopyArea (s->display->dpy, pm, img->pm, gc, 0, 0, w, h, 0, 0);	757	rxvt_img::reify ()
351	XFreeGC (s->display->dpy, gc);	758	{
		759	if (x == 0 && y == 0 && w == ref->w && h == ref->h)
		760	return clone ();
		761
		762	// add an alpha channel if...
		763	bool alpha = !format->direct.alphaMask // pixmap has none yet
		764	&& (x \|\| y) // we need one because of non-zero offset
		765	&& repeat == RepeatNone; // and we have no good pixels to fill with
		766
		767	composer cc (this, new rxvt_img (s, alpha ? find_alpha_format_for (s->dpy, format) : format,
		768	0, 0, w, h, repeat));
		769
		770	if (repeat == RepeatNone)
		771	{
		772	XRenderColor rc = { 0, 0, 0, 0 };
		773	XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
		774	XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, x, y, ref->w, ref->h);
		775	}
		776	else
		777	XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, -x, -y, 0, 0, 0, 0, w, h);
		778
		779	return cc;
		780	}
		781
		782	rxvt_img *
		783	rxvt_img::sub_rect (int x, int y, int width, int height)
		784	{
		785	rxvt_img *img = clone ();
		786
		787	img->x -= x;
		788	img->y -= y;
		789
		790	if (w != width \|\| h != height)
		791	{
		792	img->w = width;
		793	img->h = height;
		794
		795	rxvt_img *img2 = img->reify ();
		796	delete img;
		797	img = img2;
		798	}
352		799
353	return img;	800	return img;
354	}	801	}
355		802
356	rxvt_img *	803	rxvt_img *
357	rxvt_img::sub_rect (int x, int y, int width, int height)	804	rxvt_img::transform (const nv matrix[3][3])
358	{	805	{
359	rxvt_img *img = new rxvt_img (s, format, width, height);	806	return transform (mat3x3 (&matrix[0][0]));
360
361	Display *dpy = s->display->dpy;
362	XRenderPictureAttributes pa;
363	pa.repeat = repeat;
364	Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
365	Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
366
367	XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, width, height);
368
369	XRenderFreePicture (dpy, src);
370	XRenderFreePicture (dpy, dst);
371
372	return img;
373	}	807	}
374		808
375	rxvt_img *	809	rxvt_img *
376	rxvt_img::transform (int new_width, int new_height, double matrix[9])	810	rxvt_img::transform (const nv *matrix)
377	{	811	{
378	rxvt_img *img = new rxvt_img (s, format, new_width, new_height);	812	mat3x3 m (matrix);
379		813
380	Display *dpy = s->display->dpy;	814	// calculate new pixel bounding box coordinates
381	XRenderPictureAttributes pa;	815	nv rmin[2], rmax[2];
382	pa.repeat = repeat;	816
383	Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);	817	for (int i = 0; i < 2; ++i)
384	Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);	818	{
		819	nv v;
		820
		821	v = m.apply1 (i, 0+x, 0+y); rmin [i] = rmax [i] = v;
		822	v = m.apply1 (i, w+x, 0+y); min_it (rmin [i], v); max_it (rmax [i], v);
		823	v = m.apply1 (i, 0+x, h+y); min_it (rmin [i], v); max_it (rmax [i], v);
		824	v = m.apply1 (i, w+x, h+y); min_it (rmin [i], v); max_it (rmax [i], v);
		825	}
		826
		827	float sx = rmin [0] - x;
		828	float sy = rmin [1] - y;
		829
		830	// TODO: adjust matrix for subpixel accuracy
		831	int nx = floor (rmin [0]);
		832	int ny = floor (rmin [1]);
		833
		834	int new_width = ceil (rmax [0] - rmin [0]);
		835	int new_height = ceil (rmax [1] - rmin [1]);
		836
		837	mat3x3 inv = (mat3x3::translate (-x, -y) * m * mat3x3::translate (x, y)).inverse ();
		838
		839	composer cc (this, new rxvt_img (s, format, nx, ny, new_width, new_height, repeat));
385		840
386	XTransform xfrm;	841	XTransform xfrm;
387		842
388	for (int i = 0; i < 3; ++i)	843	for (int i = 0; i < 3; ++i)
389	for (int j = 0; j < 3; ++j)	844	for (int j = 0; j < 3; ++j)
390	xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);	845	xfrm.matrix [i][j] = XDoubleToFixed (inv [i][j]);
391		846
392	XRenderSetPictureFilter (dpy, src, "good", 0, 0);	847	XRenderSetPictureFilter (cc.dpy, cc.src, "good", 0, 0);
393	XRenderSetPictureTransform (dpy, src, &xfrm);	848	XRenderSetPictureTransform (cc.dpy, cc.src, &xfrm);
394	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);	849	XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, sx, sy, 0, 0, 0, 0, new_width, new_height);
395		850
396	XRenderFreePicture (dpy, src);	851	return cc;
397	XRenderFreePicture (dpy, dst);	852	}
		853
		854	rxvt_img *
		855	rxvt_img::scale (int new_width, int new_height)
		856	{
		857	if (w == new_width && h == new_height)
		858	return clone ();
		859
		860	int old_repeat_mode = repeat;
		861	repeat = RepeatPad; // not right, but xrender can't properly scale it seems
		862
		863	rxvt_img *img = transform (mat3x3::scale (new_width / (nv)w, new_height / (nv)h));
		864
		865	repeat = old_repeat_mode;
		866	img->repeat = repeat;
398		867
399	return img;	868	return img;
400	}	869	}
401		870
402	rxvt_img *	871	rxvt_img *
403	rxvt_img::scale (int new_width, int new_height)	872	rxvt_img::rotate (int cx, int cy, nv phi)
404	{	873	{
405	double matrix[9] = {	874	move (-cx, -cy);
406	w / (double)new_width, 0, 0,	875	rxvt_img *img = transform (mat3x3::rotate (phi));
407	0, h / (double)new_height, 0,	876	move ( cx, cy);
408	0, 0, 1	877	img->move (cx, cy);
409	};
410		878
411	return transform (new_width, new_height, matrix);	879	return img;
412	}	880	}
413		881
414	rxvt_img *	882	rxvt_img *
415	rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi)
416	{
417	double s = sin (phi);
418	double c = cos (phi);
419
420	double matrix[9] = {
421	c, -s, -c * x + s * y + x,
422	s, c, -s * x - c * y + y,
423	0, 0, 1
424	};
425
426	return transform (new_width, new_height, matrix);
427	}
428
429	rxvt_img *
430	rxvt_img::convert_to (XRenderPictFormat *new_format, const rxvt_color &bg)	883	rxvt_img::convert_format (XRenderPictFormat *new_format, const rgba &bg)
431	{	884	{
432	rxvt_img *img = new rxvt_img (s, new_format, w, h);	885	if (new_format == format)
		886	return clone ();
433		887
434	Display *dpy = s->display->dpy;	888	composer cc (this, new rxvt_img (s, new_format, x, y, w, h, repeat));
435	Picture src = XRenderCreatePicture (dpy, pm, format, 0, 0);	889
436	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
437	int op = PictOpSrc;	890	int op = PictOpSrc;
438		891
439	if (format->direct.alphaMask && !new_format->direct.alphaMask)	892	if (format->direct.alphaMask && !new_format->direct.alphaMask)
440	{	893	{
441	// does it have to be that complicated	894	// does it have to be that complicated
442	rgba c;
443	bg.get (c);
444
445	XRenderColor rc = { c.r, c.g, c.b, 0xffff };	895	XRenderColor rc = { bg.r, bg.g, bg.b, bg.a };
446	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);	896	XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);
447		897
448	op = PictOpOver;	898	op = PictOpOver;
449	}	899	}
450		900
451	XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);	901	XRenderComposite (cc.dpy, op, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
452		902
453	XRenderFreePicture (dpy, src);	903	return cc;
454	XRenderFreePicture (dpy, dst);	904	}
		905
		906	rxvt_img *
		907	rxvt_img::tint (const rgba &c)
		908	{
		909	composer cc (this);
		910	cc.mask (true);
		911	cc.fill (c);
		912
		913	XRenderComposite (cc.dpy, PictOpSrc, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
		914
		915	return cc;
		916	}
		917
		918	rxvt_img *
		919	rxvt_img::shade (nv factor, rgba c)
		920	{
		921	clamp_it (factor, -1., 1.);
		922	factor++;
		923
		924	if (factor > 1)
		925	{
		926	c.r = c.r * (2 - factor);
		927	c.g = c.g * (2 - factor);
		928	c.b = c.b * (2 - factor);
		929	}
		930	else
		931	{
		932	c.r = c.r * factor;
		933	c.g = c.g * factor;
		934	c.b = c.b * factor;
		935	}
		936
		937	rxvt_img *img = this->tint (c);
		938
		939	if (factor > 1)
		940	{
		941	c.a = 0xffff;
		942	c.r =
		943	c.g =
		944	c.b = 0xffff * (factor - 1);
		945
		946	img->brightness (c.r, c.g, c.b, c.a);
		947	}
455		948
456	return img;	949	return img;
457	}	950	}
458		951
459	rxvt_img *	952	rxvt_img *
460	rxvt_img::blend (rxvt_img *img, double factor)	953	rxvt_img::filter (const char name, int nparams, nv params)
461	{	954	{
462	rxvt_img *img2 = clone ();	955	composer cc (this);
463	Display *dpy = s->display->dpy;
464	Picture src = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
465	Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
466	Picture mask = create_xrender_mask (dpy, img->pm, False);
467		956
468	XRenderColor mask_c;	957	XFixed *xparams = rxvt_temp_buf<XFixed> (nparams);
469		958
470	mask_c.alpha = float_to_component (factor);	959	for (int i = 0; i < nparams; ++i)
471	mask_c.red =	960	xparams [i] = XDoubleToFixed (params [i]);
472	mask_c.green =
473	mask_c.blue = 0;
474	XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
475		961
		962	XRenderSetPictureFilter (cc.dpy, cc.src, name, xparams, nparams);
		963
476	XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h);	964	XRenderComposite (cc.dpy, PictOpSrc, cc.src, 0, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
477		965
478	XRenderFreePicture (dpy, src);
479	XRenderFreePicture (dpy, dst);
480	XRenderFreePicture (dpy, mask);
481
482	return img2;	966	return cc;
483	}	967	}
484		968
485	#endif	969	#endif
486		970

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Comparing rxvt-unicode/src/rxvtimg.C (file contents): Revision 1.30 by root, Wed Jun 6 22:01:44 2012 UTC vs. Revision 1.107 by root, Thu May 22 18:54:33 2014 UTC

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Comparing rxvt-unicode/src/rxvtimg.C (file contents):
Revision 1.30 by root, Wed Jun 6 22:01:44 2012 UTC vs.
Revision 1.107 by root, Thu May 22 18:54:33 2014 UTC