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

Comparing rxvt-unicode/src/rxvtimg.C (file contents):
Revision 1.50 by root, Thu Jun 7 19:42:09 2012 UTC vs.
Revision 1.106 by sf-exg, Fri Mar 1 09:34:40 2013 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 2 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
		31	typedef rxvt_img::nv nv;
		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
7	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int x, int y, int width, int height, int repeat)	250	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int x, int y, int width, int height, int repeat)
8	: s(screen), x(x), y(y), w(width), h(height), format(format), repeat(repeat),	251	: s(screen), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
9	pm(0), ref(0)	252	pm(0), ref(0)
10	{	253	{
11	}	254	}
14	: 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)	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)
15	{	258	{
16	++ref->cnt;	259	++ref->cnt;
17	}	260	}
18		261
19	#if 0
20	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height, Pixmap pixmap)
21	: s(screen), x(0), y(0), w(width), h(height), format(format), repeat(RepeatNormal), shared(false), pm(pixmap)
22	{
23	}
24	#endif
25
26	rxvt_img *	262	rxvt_img *
27	rxvt_img::new_from_root (rxvt_screen *s)	263	rxvt_img::new_from_root (rxvt_screen *s)
28	{	264	{
29	Display *dpy = s->display->dpy;	265	Display *dpy = s->dpy;
30	unsigned int root_pm_w, root_pm_h;	266	unsigned int root_pm_w, root_pm_h;
31	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]);
32	if (root_pixmap == None)	268	if (root_pixmap == None)
33	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]);
34		270
35	if (root_pixmap == None)	271	if (root_pixmap == None)
36	return 0;	272	return 0;
37		273
38	Window wdummy;	274	Window wdummy;
…		…
56	img->ref->ours = false;	292	img->ref->ours = false;
57		293
58	return img;	294	return img;
59	}	295	}
60		296
		297	# if HAVE_PIXBUF
		298
61	rxvt_img *	299	rxvt_img *
62	rxvt_img::new_from_pixbuf (rxvt_screen s, GdkPixbuf pb)	300	rxvt_img::new_from_pixbuf (rxvt_screen s, GdkPixbuf pb)
63	{	301	{
64	Display *dpy = s->display->dpy;	302	Display *dpy = s->dpy;
65		303
66	int width = gdk_pixbuf_get_width (pb);	304	int width = gdk_pixbuf_get_width (pb);
67	int height = gdk_pixbuf_get_height (pb);	305	int height = gdk_pixbuf_get_height (pb);
68		306
69	if (width > 32767 \|\| height > 32767) // well, we could upload in chunks	307	if (width > 32767 \|\| height > 32767) // well, we could upload in chunks
70	rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");	308	rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
71		309
72	// since we require rgb24/argb32 formats from xrender we assume	310	// since we require rgb24/argb32 formats from xrender we assume
73	// that both 24 and 32 bpp MUST be supported by any screen that supports xrender	311	// that both 24 and 32 bpp MUST be supported by any screen that supports xrender
74	int depth = gdk_pixbuf_get_has_alpha (pb) ? 32 : 24;	312
		313	int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
75		314
76	XImage xi;	315	XImage xi;
77		316
78	xi.width = width;	317	xi.width = width;
79	xi.height = height;	318	xi.height = height;
80	xi.xoffset = 0;	319	xi.xoffset = 0;
81	xi.format = ZPixmap;	320	xi.format = ZPixmap;
82	xi.byte_order = LSBFirst; // maybe go for host byte order, because servers are usually local?	321	xi.byte_order = ImageByteOrder (dpy);
83	xi.bitmap_unit = 32;	322	xi.bitmap_unit = 0; //XY only, unused
84	xi.bitmap_bit_order = LSBFirst;	323	xi.bitmap_bit_order = 0; //XY only, unused
85	xi.bitmap_pad = BitmapPad (dpy);	324	xi.bitmap_pad = BitmapPad (dpy);
86	xi.depth = depth;	325	xi.depth = 32;
87	xi.bytes_per_line = 0;	326	xi.bytes_per_line = 0;
88	xi.bits_per_pixel = 32;	327	xi.bits_per_pixel = 32; //Z only
89	xi.red_mask = 0x000000ff;	328	xi.red_mask = 0x00000000; //Z only, unused
90	xi.green_mask = 0x0000ff00;	329	xi.green_mask = 0x00000000; //Z only, unused
91	xi.blue_mask = 0x00ff0000;	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;
92		334
93	if (!XInitImage (&xi))	335	if (!XInitImage (&xi))
94	rxvt_fatal ("unable to initialise ximage, please report.\n");	336	rxvt_fatal ("unable to initialise ximage, please report.\n");
95		337
96	if (height > INT_MAX / xi.bytes_per_line)	338	if (height > INT_MAX / xi.bytes_per_line)
97	rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");	339	rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
98		340
99	xi.data = (char )rxvt_malloc (height xi.bytes_per_line);	341	xi.data = (char )rxvt_malloc (height xi.bytes_per_line);
100		342
101	int rowstride = gdk_pixbuf_get_rowstride (pb);	343	int rowstride = gdk_pixbuf_get_rowstride (pb);
102		344	bool pb_has_alpha = gdk_pixbuf_get_has_alpha (pb);
103	assert (3 + (depth == 32) == gdk_pixbuf_get_n_channels (pb));
104	unsigned char *row = gdk_pixbuf_get_pixels (pb);	345	unsigned char *row = gdk_pixbuf_get_pixels (pb);
		346
105	char *line = xi.data;	347	char *line = xi.data;
106		348
107	for (int y = 0; y < height; y++)	349	for (int y = 0; y < height; y++)
108	{	350	{
109	unsigned char *src = row;	351	unsigned char *src = row;
110	uint32_t dst = (uint32_t )line;	352	uint32_t dst = (uint32_t )line;
111		353
112	if (depth == 24)
113	for (int x = 0; x < width; x++)	354	for (int x = 0; x < width; x++)
114	{	355	{
115	uint8_t r = *src++;	356	uint8_t r = *src++;
116	uint8_t g = *src++;	357	uint8_t g = *src++;
117	uint8_t b = *src++;	358	uint8_t b = *src++;
		359	uint8_t a = *src;
118		360
119	uint32_t v = r \| (g << 8) \| (b << 16);	361	// this is done so it can be jump-free, but newer gcc's clone inner the loop
120		362	a = pb_has_alpha ? a : 255;
121	if (ecb_big_endian ())	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)
122	v = ecb_bswap32 (v);	372	v = ecb_bswap32 (v);
123		373
124	*dst++ = x;	374	*dst++ = v;
125	}	375	}
126	else
127	for (int x = 0; x < width; x++)
128	{
129	uint32_t v = (uint32_t )src; src += 4;
130	v = ecb_big_endian () ? ecb_rotr32 (v, 8) : ecb_rotl32 (v, 8);
131	*dst++ = ecb_bswap32 (v);
132	}
133		376
134	row += rowstride;	377	row += rowstride;
135	line += xi.bytes_per_line;	378	line += xi.bytes_per_line;
136	}	379	}
137		380
138	rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, depth == 24 ? PictStandardRGB24 : PictStandardARGB32), 0, 0, width, height);	381	rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, PictStandardARGB32), 0, 0, width, height);
139	img->alloc ();	382	img->alloc ();
140		383
141	GC gc = XCreateGC (dpy, img->pm, 0, 0);	384	GC gc = XCreateGC (dpy, img->pm, 0, 0);
142	XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);	385	XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
143	XFreeGC (dpy, gc);	386	XFreeGC (dpy, gc);
…		…
161	g_object_unref (pb);	404	g_object_unref (pb);
162		405
163	return img;	406	return img;
164	}	407	}
165		408
		409	# endif
		410
166	void	411	void
167	rxvt_img::destroy ()	412	rxvt_img::destroy ()
168	{	413	{
169	if (--ref->cnt)	414	if (--ref->cnt)
170	return;	415	return;
171		416
172	if (pm && ref->ours)	417	if (pm && ref->ours)
173	XFreePixmap (s->display->dpy, pm);	418	XFreePixmap (s->dpy, pm);
174		419
175	delete ref;	420	delete ref;
176	}	421	}
177		422
178	rxvt_img::~rxvt_img ()	423	rxvt_img::~rxvt_img ()
…		…
181	}	426	}
182		427
183	void	428	void
184	rxvt_img::alloc ()	429	rxvt_img::alloc ()
185	{	430	{
186	pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);	431	pm = XCreatePixmap (s->dpy, s->display->root, w, h, format->depth);
187	ref = new pixref (w, h);	432	ref = new pixref (w, h);
188	}	433	}
189		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
190	Picture	444	Picture
191	rxvt_img::src_picture ()	445	rxvt_img::picture ()
192	{	446	{
193	Display *dpy = s->display->dpy;	447	Display *dpy = s->dpy;
194		448
195	XRenderPictureAttributes pa;	449	XRenderPictureAttributes pa;
196	pa.repeat = repeat;	450	pa.repeat = repeat;
197	Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);	451	Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
198		452
…		…
203	rxvt_img::unshare ()	457	rxvt_img::unshare ()
204	{	458	{
205	if (ref->cnt == 1 && ref->ours)	459	if (ref->cnt == 1 && ref->ours)
206	return;	460	return;
207		461
208	//TODO: maybe should reify instead
209	Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth);	462	Pixmap pm2 = XCreatePixmap (s->dpy, s->display->root, ref->w, ref->h, format->depth);
210	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);	463	GC gc = XCreateGC (s->dpy, pm, 0, 0);
211	XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);	464	XCopyArea (s->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
212	XFreeGC (s->display->dpy, gc);	465	XFreeGC (s->dpy, gc);
213		466
214	destroy ();	467	destroy ();
215		468
216	pm = pm2;	469	pm = pm2;
217	ref = new pixref (ref->w, ref->h);	470	ref = new pixref (ref->w, ref->h);
218	}	471	}
219		472
220	void	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
221	rxvt_img::fill (const rxvt_color &c)	485	rxvt_img::fill (const rgba &c)
222	{	486	{
223	XGCValues gcv;	487	fill (c, 0, 0, w, h);
224	gcv.foreground = c;	488	}
225	GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);	489
226	XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);	490	void
227	XFreeGC (s->display->dpy, gc);	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
		500	rxvt_img *img = cc;
		501
		502	::swap (img->ref, ref);
		503	::swap (img->pm , pm );
		504
		505	delete img;
228	}	506	}
229		507
230	static void	508	static void
231	get_gaussian_kernel (int radius, int width, double kernel, XFixed params)	509	get_gaussian_kernel (int radius, int width, nv kernel, XFixed params)
232	{	510	{
233	double sigma = radius / 2.0;	511	nv sigma = radius / 2.0;
234	double scale = sqrt (2.0 * M_PI) * sigma;	512	nv scale = sqrt (2.0 * M_PI) * sigma;
235	double sum = 0.0;	513	nv sum = 0.0;
236		514
237	for (int i = 0; i < width; i++)	515	for (int i = 0; i < width; i++)
238	{	516	{
239	double x = i - width / 2;	517	nv x = i - width / 2;
240	kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;	518	kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
241	sum += kernel[i];	519	sum += kernel[i];
242	}	520	}
243		521
244	params[0] = XDoubleToFixed (width);	522	params[0] = XDoubleToFixed (width);
…		…
252	rxvt_img::blur (int rh, int rv)	530	rxvt_img::blur (int rh, int rv)
253	{	531	{
254	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))	532	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
255	return clone ();	533	return clone ();
256		534
257	Display *dpy = s->display->dpy;	535	Display *dpy = s->dpy;
258	int size = max (rh, rv) * 2 + 1;	536	int size = max (rh, rv) * 2 + 1;
259	double kernel = (double )malloc (size * sizeof (double));	537	nv kernel = (nv )malloc (size * sizeof (nv));
260	XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));	538	XFixed *params = rxvt_temp_buf<XFixed> (size + 2);
261	rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);	539	rxvt_img *img = new_empty ();
262	img->alloc ();
263
264	Picture src = src_picture ();
265		540
266	XRenderPictureAttributes pa;	541	XRenderPictureAttributes pa;
267	pa.repeat = RepeatPad;	542	pa.repeat = RepeatPad;
268	Picture dst = XRenderCreatePicture (dpy, img->pm, format, CPRepeat, &pa);	543	Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
		544	Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
269		545
270	Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);	546	Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
271	Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);	547	Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
272	XFreePixmap (dpy, tmp_pm);	548	XFreePixmap (dpy, tmp_pm);
273		549
…		…
289		565
290	size = rv * 2 + 1;	566	size = rv * 2 + 1;
291	get_gaussian_kernel (rv, size, kernel, params);	567	get_gaussian_kernel (rv, size, kernel, params);
292	::swap (params[0], params[1]);	568	::swap (params[0], params[1]);
293		569
294	XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);	570	XRenderSetPictureFilter (dpy, tmp, FilterConvolution, params, size+2);
295	XRenderComposite (dpy,	571	XRenderComposite (dpy,
296	PictOpSrc,	572	PictOpSrc,
297	tmp,	573	tmp,
298	None,	574	None,
299	dst,	575	dst,
…		…
302	0, 0,	578	0, 0,
303	w, h);	579	w, h);
304	}	580	}
305		581
306	free (kernel);	582	free (kernel);
307	free (params);	583
308	XRenderFreePicture (dpy, src);	584	XRenderFreePicture (dpy, src);
309	XRenderFreePicture (dpy, dst);	585	XRenderFreePicture (dpy, dst);
310	XRenderFreePicture (dpy, tmp);	586	XRenderFreePicture (dpy, tmp);
311		587
312	return img;	588	return img;
313	}	589	}
314		590
315	static Picture	591	rxvt_img *
316	create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)	592	rxvt_img::muladd (nv mul, nv add)
317	{	593	{
318	Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);	594	// STEP 1: double the image width, fill all odd columns with white (==1)
319		595
320	XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);	596	composer cc (this, new rxvt_img (s, format, 0, 0, w * 2, h, repeat));
321	XRenderPictureAttributes pa;
322	pa.repeat = True;
323	Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
324		597
325	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	};
326		605
327	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;
328	}	666	}
329		667
330	void	668	void
331	rxvt_img::brightness (unsigned short r, unsigned short g, unsigned short b, unsigned short a)	669	rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a)
332	{	670	{
		671	unshare ();
		672
333	Display *dpy = s->display->dpy;	673	Display *dpy = s->dpy;
334	Picture src = create_xrender_mask (dpy, pm, True);
335	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);	674	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
336		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;
337	XRenderColor mask_c;	680	XRenderColor mask_c;
338	mask_c.red = r;	681
339	mask_c.green = g;	682	if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
340	mask_c.blue = b;
341	mask_c.alpha = a;
342	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);	683	XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
343		684
344	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	}
345		697
346	XRenderFreePicture (dpy, src);
347	XRenderFreePicture (dpy, dst);	698	XRenderFreePicture (dpy, dst);
348	}	699	}
349		700
350	void	701	void
351	rxvt_img::contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short a)	702	rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a)
352	{	703	{
353	if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))	704	if (r < 0 \|\| g < 0 \|\| b < 0 \|\| a < 0)
354	return;	705	rxvt_fatal ("rxvt_img::contrast does not support negative values.\n");
355		706
356	Display *dpy = s->display->dpy;	707	// premultiply (yeah, these are not exact, sue me or fix it)
357	Picture src = create_xrender_mask (dpy, pm, True);	708	r = (r * (a >> 8)) >> 8;
358	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);	709	g = (g * (a >> 8)) >> 8;
		710	b = (b * (a >> 8)) >> 8;
359		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;
360	XRenderColor mask_c;	722	XRenderColor mask_c;
361	mask_c.red = r;	723
362	mask_c.green = g;	724	if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
363	mask_c.blue = b;	725	{
364	mask_c.alpha = a;
365	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);	726	XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &mask_c, 0, 0, 1, 1);
366
367	XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);	727	XRenderComposite (cc.dpy, PictOpAdd, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
		728	}
		729	}
368		730
369	XRenderFreePicture (dpy, src);	731	::swap (img->ref, ref);
370	XRenderFreePicture (dpy, dst);	732	::swap (img->pm , pm );
		733
		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);
371	}	748	}
372		749
373	rxvt_img *	750	rxvt_img *
374	rxvt_img::clone ()	751	rxvt_img::clone ()
375	{	752	{
376	return new rxvt_img (*this);	753	return new rxvt_img (*this);
377	}
378
379	static XRenderPictFormat *
380	find_alpha_format_for (Display dpy, XRenderPictFormat format)
381	{
382	if (format->direct.alphaMask)
383	return format; // already has alpha
384
385	// try to find a suitable alpha format, one bit alpha is enough for our purposes
386	if (format->type == PictTypeDirect)
387	for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
388	if (f->direct.alphaMask
389	&& f->type == PictTypeDirect
390	&& ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
391	&& ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
392	&& ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
393	return f;
394
395	// should be a very good fallback
396	return XRenderFindStandardFormat (dpy, PictStandardARGB32);
397	}	754	}
398		755
399	rxvt_img *	756	rxvt_img *
400	rxvt_img::reify ()	757	rxvt_img::reify ()
401	{	758	{
402	if (x == 0 && y == 0 && w == ref->w && h == ref->h)	759	if (x == 0 && y == 0 && w == ref->w && h == ref->h)
403	return clone ();	760	return clone ();
404		761
405	Display *dpy = s->display->dpy;	762	// add an alpha channel if...
406
407	bool alpha = !format->direct.alphaMask	763	bool alpha = !format->direct.alphaMask // pixmap has none yet
408	&& (x \|\| y)	764	&& (x \|\| y) // we need one because of non-zero offset
409	&& repeat == RepeatNone;	765	&& repeat == RepeatNone; // and we have no good pixels to fill with
410		766
411	rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat);	767	composer cc (this, new rxvt_img (s, alpha ? find_alpha_format_for (s->dpy, format) : format,
412	img->alloc ();	768	0, 0, w, h, repeat));
413		769
414	Picture src = src_picture ();	770	if (repeat == RepeatNone)
415	Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
416
417	if (alpha)
418	{	771	{
419	XRenderColor rc = { 0, 0, 0, 0 };	772	XRenderColor rc = { 0, 0, 0, 0 };
420	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles	773	XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
421	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h);	774	XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, x, y, ref->w, ref->h);
422	}	775	}
423	else	776	else
424	XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h);	777	XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, -x, -y, 0, 0, 0, 0, w, h);
425		778
426	XRenderFreePicture (dpy, src);
427	XRenderFreePicture (dpy, dst);
428
429	return img;	779	return cc;
430	}	780	}
431		781
432	rxvt_img *	782	rxvt_img *
433	rxvt_img::sub_rect (int x, int y, int width, int height)	783	rxvt_img::sub_rect (int x, int y, int width, int height)
434	{	784	{
435	rxvt_img *img = clone ();	785	rxvt_img *img = clone ();
436		786
437	img->x += x;	787	img->x -= x;
438	img->y += y;	788	img->y -= y;
439		789
440	if (w != width \|\| h != height)	790	if (w != width \|\| h != height)
441	{	791	{
442	img->w = width;	792	img->w = width;
443	img->h = height;	793	img->h = height;
…		…
449		799
450	return img;	800	return img;
451	}	801	}
452		802
453	rxvt_img *	803	rxvt_img *
454	rxvt_img::transform (int new_width, int new_height, double matrix[9])	804	rxvt_img::transform (const nv matrix[3][3])
455	{	805	{
456	rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat);	806	return transform (mat3x3 (&matrix[0][0]));
457	img->alloc ();	807	}
458		808
459	Display *dpy = s->display->dpy;	809	rxvt_img *
460	Picture src = src_picture ();	810	rxvt_img::transform (const nv *matrix)
461	Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);	811	{
		812	mat3x3 m (matrix);
		813
		814	// calculate new pixel bounding box coordinates
		815	nv rmin[2], rmax[2];
		816
		817	for (int i = 0; i < 2; ++i)
		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));
462		840
463	XTransform xfrm;	841	XTransform xfrm;
464		842
465	for (int i = 0; i < 3; ++i)	843	for (int i = 0; i < 3; ++i)
466	for (int j = 0; j < 3; ++j)	844	for (int j = 0; j < 3; ++j)
467	xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);	845	xfrm.matrix [i][j] = XDoubleToFixed (inv [i][j]);
468		846
469	#if 0
470	xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
471	xfrm.matrix [1][2] -= XDoubleToFixed (y);
472	#endif
473
474	XRenderSetPictureFilter (dpy, src, "good", 0, 0);	847	XRenderSetPictureFilter (cc.dpy, cc.src, "good", 0, 0);
475	XRenderSetPictureTransform (dpy, src, &xfrm);	848	XRenderSetPictureTransform (cc.dpy, cc.src, &xfrm);
476	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);
477		850
478	XRenderFreePicture (dpy, src);
479	XRenderFreePicture (dpy, dst);
480
481	return img;	851	return cc;
482	}	852	}
483		853
484	rxvt_img *	854	rxvt_img *
485	rxvt_img::scale (int new_width, int new_height)	855	rxvt_img::scale (int new_width, int new_height)
486	{	856	{
487	if (w == new_width && h == new_height)	857	if (w == new_width && h == new_height)
488	return clone ();	858	return clone ();
489		859
490	double matrix[9] = {
491	w / (double)new_width, 0, 0,
492	0, h / (double)new_height, 0,
493	0, 0, 1
494	};
495
496	int old_repeat_mode = repeat;	860	int old_repeat_mode = repeat;
497	repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems	861	repeat = RepeatPad; // not right, but xrender can't properly scale it seems
498		862
499	rxvt_img *img = transform (new_width, new_height, matrix);	863	rxvt_img *img = transform (mat3x3::scale (new_width / (nv)w, new_height / (nv)h));
500		864
501	repeat = old_repeat_mode;	865	repeat = old_repeat_mode;
502	img->repeat = repeat;	866	img->repeat = repeat;
503		867
504	return img;	868	return img;
505	}	869	}
506		870
507	rxvt_img *	871	rxvt_img *
508	rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi)	872	rxvt_img::rotate (int cx, int cy, nv phi)
509	{	873	{
510	double s = sin (phi);	874	move (-cx, -cy);
511	double c = cos (phi);	875	rxvt_img *img = transform (mat3x3::rotate (phi));
		876	move ( cx, cy);
		877	img->move (cx, cy);
512		878
513	double matrix[9] = {	879	return img;
514	c, -s, -c * x + s * y + x,
515	s, c, -s * x - c * y + y,
516	0, 0, 1
517	};
518
519	return transform (new_width, new_height, matrix);
520	}	880	}
521		881
522	rxvt_img *	882	rxvt_img *
523	rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)	883	rxvt_img::convert_format (XRenderPictFormat *new_format, const rgba &bg)
524	{	884	{
525	if (new_format == format)	885	if (new_format == format)
526	return clone ();	886	return clone ();
527		887
528	rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat);	888	composer cc (this, new rxvt_img (s, new_format, x, y, w, h, repeat));
529	img->alloc ();
530		889
531	Display *dpy = s->display->dpy;
532	Picture src = src_picture ();
533	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
534	int op = PictOpSrc;	890	int op = PictOpSrc;
535		891
536	if (format->direct.alphaMask && !new_format->direct.alphaMask)	892	if (format->direct.alphaMask && !new_format->direct.alphaMask)
537	{	893	{
538	// does it have to be that complicated	894	// does it have to be that complicated
539	rgba c;
540	bg.get (c);
541
542	XRenderColor rc = { c.r, c.g, c.b, 0xffff };	895	XRenderColor rc = { bg.r, bg.g, bg.b, bg.a };
543	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);	896	XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);
544		897
545	op = PictOpOver;	898	op = PictOpOver;
546	}	899	}
547		900
548	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);
549		902
550	XRenderFreePicture (dpy, src);	903	return cc;
551	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	}
552		948
553	return img;	949	return img;
554	}	950	}
555		951
556	rxvt_img *	952	rxvt_img *
557	rxvt_img::blend (rxvt_img *img, double factor)	953	rxvt_img::filter (const char name, int nparams, nv params)
558	{	954	{
559	rxvt_img *img2 = clone ();	955	composer cc (this);
560	Display *dpy = s->display->dpy;
561	Picture src = img->src_picture ();
562	Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
563	Picture mask = create_xrender_mask (dpy, img->pm, False);
564		956
565	XRenderColor mask_c;	957	XFixed *xparams = rxvt_temp_buf<XFixed> (nparams);
566		958
567	mask_c.alpha = float_to_component (factor);	959	for (int i = 0; i < nparams; ++i)
568	mask_c.red =	960	xparams [i] = XDoubleToFixed (params [i]);
569	mask_c.green =
570	mask_c.blue = 0;
571	XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
572		961
		962	XRenderSetPictureFilter (cc.dpy, cc.src, name, xparams, nparams);
		963
573	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);
574		965
575	XRenderFreePicture (dpy, src);
576	XRenderFreePicture (dpy, dst);
577	XRenderFreePicture (dpy, mask);
578
579	return img2;	966	return cc;
580	}	967	}
581		968
582	#endif	969	#endif
583		970

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Comparing rxvt-unicode/src/rxvtimg.C (file contents): Revision 1.50 by root, Thu Jun 7 19:42:09 2012 UTC vs. Revision 1.106 by sf-exg, Fri Mar 1 09:34:40 2013 UTC

Diff Legend

Comparing rxvt-unicode/src/rxvtimg.C (file contents):
Revision 1.50 by root, Thu Jun 7 19:42:09 2012 UTC vs.
Revision 1.106 by sf-exg, Fri Mar 1 09:34:40 2013 UTC