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

Comparing rxvt-unicode/src/rxvtimg.C (file contents):
Revision 1.17 by root, Mon Jun 4 18:17:25 2012 UTC vs.
Revision 1.79 by root, Tue Jun 12 10:45:53 2012 UTC

…		…
2	#include "../config.h"	2	#include "../config.h"
3	#include "rxvt.h"	3	#include "rxvt.h"
4		4
5	#if HAVE_IMG	5	#if HAVE_IMG
6		6
7	#define float_to_component(d) ((d) * 65535.99)
8
9	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height)	7	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int x, int y, int width, int height, int repeat)
10	: s(screen), w(width), h(height), format(format), shared(false)
11	{
12	pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
13	}
14
15	rxvt_img::rxvt_img (rxvt_screen screen, XRenderPictFormat format, int width, int height, Pixmap pixmap)
16	: s(screen), pm(pixmap), w(width), h(height), format(format), shared(false)	8	: s(screen), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
		9	pm(0), ref(0)
17	{	10	{
		11	}
		12
		13	rxvt_img::rxvt_img (const rxvt_img &img)
		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)
		15	{
		16	++ref->cnt;
		17	}
		18
		19	rxvt_img *
		20	rxvt_img::new_from_root (rxvt_screen *s)
		21	{
		22	Display *dpy = s->display->dpy;
		23	unsigned int root_pm_w, root_pm_h;
		24	Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_XROOTPMAP_ID]);
		25	if (root_pixmap == None)
		26	root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_ESETROOT_PMAP_ID]);
		27
		28	if (root_pixmap == None)
		29	return 0;
		30
		31	Window wdummy;
		32	int idummy;
		33	unsigned int udummy;
		34
		35	if (!XGetGeometry (dpy, root_pixmap, &wdummy, &idummy, &idummy, &root_pm_w, &root_pm_h, &udummy, &udummy))
		36	return 0;
		37
		38	rxvt_img *img = new rxvt_img (
		39	s,
		40	XRenderFindVisualFormat (dpy, DefaultVisual (dpy, s->display->screen)),
		41	0,
		42	0,
		43	root_pm_w,
		44	root_pm_h
		45	);
		46
		47	img->pm = root_pixmap;
		48	img->ref = new pixref (root_pm_w, root_pm_h);
		49	img->ref->ours = false;
		50
		51	return img;
		52	}
		53
		54	# if HAVE_PIXBUF
		55
		56	rxvt_img *
		57	rxvt_img::new_from_pixbuf (rxvt_screen s, GdkPixbuf pb)
		58	{
		59	Display *dpy = s->display->dpy;
		60
		61	int width = gdk_pixbuf_get_width (pb);
		62	int height = gdk_pixbuf_get_height (pb);
		63
		64	if (width > 32767 \|\| height > 32767) // well, we could upload in chunks
		65	rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
		66
		67	// since we require rgb24/argb32 formats from xrender we assume
		68	// that both 24 and 32 bpp MUST be supported by any screen that supports xrender
		69
		70	int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
		71
		72	XImage xi;
		73
		74	xi.width = width;
		75	xi.height = height;
		76	xi.xoffset = 0;
		77	xi.format = ZPixmap;
		78	xi.byte_order = ImageByteOrder (dpy);
		79	xi.bitmap_unit = 0; //XY only, unused
		80	xi.bitmap_bit_order = 0; //XY only, unused
		81	xi.bitmap_pad = BitmapPad (dpy);
		82	xi.depth = 32;
		83	xi.bytes_per_line = 0;
		84	xi.bits_per_pixel = 32; //Z only
		85	xi.red_mask = 0x00000000; //Z only, unused
		86	xi.green_mask = 0x00000000; //Z only, unused
		87	xi.blue_mask = 0x00000000; //Z only, unused
		88	xi.obdata = 0; // probably unused
		89
		90	bool byte_order_mismatch = byte_order != xi.byte_order;
		91
		92	if (!XInitImage (&xi))
		93	rxvt_fatal ("unable to initialise ximage, please report.\n");
		94
		95	if (height > INT_MAX / xi.bytes_per_line)
		96	rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
		97
		98	xi.data = (char )rxvt_malloc (height xi.bytes_per_line);
		99
		100	int rowstride = gdk_pixbuf_get_rowstride (pb);
		101	bool pb_has_alpha = gdk_pixbuf_get_has_alpha (pb);
		102	unsigned char *row = gdk_pixbuf_get_pixels (pb);
		103
		104	char *line = xi.data;
		105
		106	for (int y = 0; y < height; y++)
		107	{
		108	unsigned char *src = row;
		109	uint32_t dst = (uint32_t )line;
		110
		111	if (!pb_has_alpha)
		112	for (int x = 0; x < width; x++)
		113	{
		114	uint8_t r = *src++;
		115	uint8_t g = *src++;
		116	uint8_t b = *src++;
		117
		118	uint32_t v = (255 << 24) \| (r << 16) \| (g << 8) \| b;
		119
		120	if (ecb_big_endian () ? !byte_order_mismatch : byte_order_mismatch)
		121	v = ecb_bswap32 (v);
		122
		123	*dst++ = v;
		124	}
		125	else
		126	for (int x = 0; x < width; x++)
		127	{
		128	uint32_t v = (uint32_t )src; src += 4;
		129
		130	if (ecb_big_endian ())
		131	v = ecb_bswap32 (v);
		132
		133	v = ecb_rotl32 (v, 8); // abgr to bgra
		134
		135	if (!byte_order_mismatch)
		136	v = ecb_bswap32 (v);
		137
		138	*dst++ = v;
		139	}
		140
		141	row += rowstride;
		142	line += xi.bytes_per_line;
		143	}
		144
		145	rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, PictStandardARGB32), 0, 0, width, height);
		146	img->alloc ();
		147
		148	GC gc = XCreateGC (dpy, img->pm, 0, 0);
		149	XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
		150	XFreeGC (dpy, gc);
		151
		152	free (xi.data);
		153
		154	return img;
18	}	155	}
19		156
20	rxvt_img *	157	rxvt_img *
21	rxvt_img::new_from_file (rxvt_screen s, const char filename)	158	rxvt_img::new_from_file (rxvt_screen s, const char filename)
22	{	159	{
…		…
24	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);	161	GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
25		162
26	if (!pb)	163	if (!pb)
27	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);	164	rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
28		165
29	rxvt_img *img = new rxvt_img (	166	rxvt_img *img = new_from_pixbuf (s, pb);
30	s,
31	XRenderFindStandardFormat (s->display->dpy, gdk_pixbuf_get_has_alpha (pb) ? PictStandardARGB32 : PictStandardRGB24),
32	gdk_pixbuf_get_width (pb),
33	gdk_pixbuf_get_height (pb)
34	);
35		167
36	img->render_pixbuf (pb, 0, 0, img->w, img->h, 0, 0);	168	g_object_unref (pb);
37		169
		170	return img;
		171	}
		172
		173	# endif
		174
		175	void
		176	rxvt_img::destroy ()
		177	{
		178	if (--ref->cnt)
38	return img;	179	return;
		180
		181	if (pm && ref->ours)
		182	XFreePixmap (s->display->dpy, pm);
		183
		184	delete ref;
39	}	185	}
40		186
41	rxvt_img::~rxvt_img ()	187	rxvt_img::~rxvt_img ()
42	{	188	{
43	if (!shared)	189	destroy ();
44	XFreePixmap (s->display->dpy, pm);	190	}
		191
		192	void
		193	rxvt_img::alloc ()
		194	{
		195	pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth);
		196	ref = new pixref (w, h);
		197	}
		198
		199	Picture
		200	rxvt_img::src_picture ()
		201	{
		202	Display *dpy = s->display->dpy;
		203
		204	XRenderPictureAttributes pa;
		205	pa.repeat = repeat;
		206	Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
		207
		208	return pic;
45	}	209	}
46		210
47	void	211	void
48	rxvt_img::unshare ()	212	rxvt_img::unshare ()
49	{	213	{
50	if (!shared)	214	if (ref->cnt == 1 && ref->ours)
51	return;	215	return;
52		216
53	rxvt_img *img = clone ();	217	Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth);
		218	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
		219	XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
		220	XFreeGC (s->display->dpy, gc);
54		221
55	::swap (pm , img->pm);	222	destroy ();
56	::swap (shared, img->shared);
57		223
58	delete img;	224	pm = pm2;
		225	ref = new pixref (ref->w, ref->h);
59	}	226	}
60		227
61	void	228	void
62	rxvt_img::fill (const rxvt_color &c)	229	rxvt_img::fill (const rxvt_color &c)
63	{	230	{
64	XGCValues gcv;	231	rgba cc;
65	gcv.foreground = c;	232	c.get (cc);
66	GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv);	233	XRenderColor rc = { cc.r, cc.g, cc.b, cc.a };
67	XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h);	234
68	XFreeGC (s->display->dpy, gc);	235	Display *dpy = s->display->dpy;
		236	Picture src = src_picture ();
		237	XRenderFillRectangle (dpy, PictOpSrc, src, &rc, 0, 0, w, h);
		238	XRenderFreePicture (dpy, src);
69	}	239	}
70		240
71	static void	241	static void
72	get_gaussian_kernel (int radius, int width, double kernel, XFixed params)	242	get_gaussian_kernel (int radius, int width, double kernel, XFixed params)
73	{	243	{
…		…
87		257
88	for (int i = 0; i < width; i++)	258	for (int i = 0; i < width; i++)
89	params[i+2] = XDoubleToFixed (kernel[i] / sum);	259	params[i+2] = XDoubleToFixed (kernel[i] / sum);
90	}	260	}
91		261
92	void	262	rxvt_img *
93	rxvt_img::blur (int rh, int rv)	263	rxvt_img::blur (int rh, int rv)
94	{	264	{
95	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))	265	if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
96	return;	266	return clone ();
97		267
98	Display *dpy = s->display->dpy;	268	Display *dpy = s->display->dpy;
99	int size = max (rh, rv) * 2 + 1;	269	int size = max (rh, rv) * 2 + 1;
100	double kernel = (double )malloc (size * sizeof (double));	270	double kernel = (double )malloc (size * sizeof (double));
101	XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));	271	XFixed params = (XFixed )malloc ((size + 2) * sizeof (XFixed));
		272	rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
		273	img->alloc ();
102		274
103	XRenderPictureAttributes pa;	275	XRenderPictureAttributes pa;
104
105	pa.repeat = RepeatPad;	276	pa.repeat = RepeatPad;
106	Picture src = XRenderCreatePicture (dpy, pm , format, CPRepeat, &pa);	277	Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
		278	Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
		279
107	Pixmap tmp = XCreatePixmap (dpy, pm, w, h, format->depth);	280	Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
108	Picture dst = XRenderCreatePicture (dpy, tmp, format, CPRepeat, &pa);	281	Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
109	XFreePixmap (dpy, tmp);	282	XFreePixmap (dpy, tmp_pm);
110		283
111	if (kernel && params)	284	if (kernel && params)
112	{	285	{
113	size = rh * 2 + 1;	286	size = rh * 2 + 1;
114	get_gaussian_kernel (rh, size, kernel, params);	287	get_gaussian_kernel (rh, size, kernel, params);
115		288
116	XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);	289	XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
117	XRenderComposite (dpy,	290	XRenderComposite (dpy,
118	PictOpSrc,	291	PictOpSrc,
119	src,	292	src,
		293	None,
		294	tmp,
		295	0, 0,
		296	0, 0,
		297	0, 0,
		298	w, h);
		299
		300	size = rv * 2 + 1;
		301	get_gaussian_kernel (rv, size, kernel, params);
		302	::swap (params[0], params[1]);
		303
		304	XRenderSetPictureFilter (dpy, tmp, FilterConvolution, params, size+2);
		305	XRenderComposite (dpy,
		306	PictOpSrc,
		307	tmp,
120	None,	308	None,
121	dst,	309	dst,
122	0, 0,	310	0, 0,
123	0, 0,	311	0, 0,
124	0, 0,	312	0, 0,
125	w, h);	313	w, h);
126
127	::swap (src, dst);
128
129	size = rv * 2 + 1;
130	get_gaussian_kernel (rv, size, kernel, params);
131	::swap (params[0], params[1]);
132
133	XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2);
134	XRenderComposite (dpy,
135	PictOpSrc,
136	src,
137	None,
138	dst,
139	0, 0,
140	0, 0,
141	0, 0,
142	w, h);
143	}	314	}
144		315
145	free (kernel);	316	free (kernel);
146	free (params);	317	free (params);
		318
147	XRenderFreePicture (dpy, src);	319	XRenderFreePicture (dpy, src);
148	XRenderFreePicture (dpy, dst);	320	XRenderFreePicture (dpy, dst);
		321	XRenderFreePicture (dpy, tmp);
		322
		323	return img;
149	}	324	}
150		325
151	static Picture	326	static Picture
152	create_xrender_mask (Display *dpy, Drawable drawable, Bool argb)	327	create_xrender_mask (Display *dpy, Drawable drawable, Bool argb, Bool component_alpha)
153	{	328	{
154	Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);	329	Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8);
155		330
156	XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);	331	XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8);
157	XRenderPictureAttributes pa;	332	XRenderPictureAttributes pa;
158	pa.repeat = True;	333	pa.repeat = RepeatNormal;
		334	pa.component_alpha = component_alpha;
159	Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);	335	Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat \| CPComponentAlpha, &pa);
160		336
161	XFreePixmap (dpy, pixmap);	337	XFreePixmap (dpy, pixmap);
162		338
163	return mask;	339	return mask;
164	}	340	}
165		341
		342	static void
		343	extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc)
		344	{
		345	int32_t x = clamp (c, cl0, cl1);
		346	c -= x;
		347	xc = x;
		348	}
		349
		350	static bool
		351	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)
		352	{
		353	extract (cl0, cl1, r, xr);
		354	extract (cl0, cl1, g, xg);
		355	extract (cl0, cl1, b, xb);
		356	extract (cl0, cl1, a, xa);
		357
		358	return xr \| xg \| xb \| xa;
		359	}
		360
166	void	361	void
167	rxvt_img::brightness (double r, double g, double b, double a)	362	rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a)
168	{	363	{
		364	unshare ();
		365
169	Display *dpy = s->display->dpy;	366	Display *dpy = s->display->dpy;
170	Picture src = create_xrender_mask (dpy, pm, True);
171	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);	367	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
172		368
		369	// loop should not be needed for brightness, as only -1..1 makes sense
		370	//while (r \| g \| b \| a)
		371	{
		372	unsigned short xr, xg, xb, xa;
173	XRenderColor mask_c;	373	XRenderColor mask_c;
174	mask_c.red = float_to_component (r);	374
175	mask_c.green = float_to_component (g);	375	if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
176	mask_c.blue = float_to_component (b);
177	mask_c.alpha = float_to_component (a);
178	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);	376	XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
179		377
180	XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);	378	if (extract (-65535, 0, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
		379	{
		380	XRenderColor mask_w = { 65535, 65535, 65535, 65535 };
		381	XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
		382	mask_c.red = -mask_c.red; //TODO: verify that doing clamp, assign, and negation does the right thing
		383	mask_c.green = -mask_c.green;
		384	mask_c.blue = -mask_c.blue;
		385	mask_c.alpha = -mask_c.alpha;
		386	XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
		387	XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
		388	}
		389	}
		390
		391	XRenderFreePicture (dpy, dst);
181	}	392	}
182		393
183	void	394	void
184	rxvt_img::contrast (double r, double g, double b, double a)	395	rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a)
185	{	396	{
186	if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL))	397	if (r < 0 \|\| g < 0 \|\| b < 0 \|\| a < 0)
187	return;	398	rxvt_fatal ("rxvt_img::contrast does not support negative values.\n");
188		399
		400	rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
		401	img->alloc ();
		402
		403	{
		404	rxvt_color empty;
		405	empty.set (s, rgba (0, 0, 0, 0));
		406	img->fill (empty);
		407	}
		408
		409	// premultiply (yeah, these are not exact, sue me or fix it)
		410	r = (r * (a >> 8)) >> 8;
		411	g = (g * (a >> 8)) >> 8;
		412	b = (b * (a >> 8)) >> 8;
		413
189	Display *dpy = s->display->dpy;	414	Display *dpy = s->display->dpy;
190	Picture src = create_xrender_mask (dpy, pm, True);	415
		416	Picture src = src_picture ();
191	Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);	417	Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
		418	Picture mul = create_xrender_mask (dpy, pm, True, True);
192		419
		420	//TODO: this operator does not yet implement some useful contrast
		421	while (r \| g \| b \| a)
		422	{
		423	unsigned short xr, xg, xb, xa;
193	XRenderColor mask_c;	424	XRenderColor mask_c;
194	mask_c.red = float_to_component (r);	425
195	mask_c.green = float_to_component (g);	426	if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
196	mask_c.blue = float_to_component (b);	427	{
197	mask_c.alpha = float_to_component (a);
198	XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);	428	XRenderFillRectangle (dpy, PictOpSrc, mul, &mask_c, 0, 0, 1, 1);
199
200	XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);	429	XRenderComposite (dpy, PictOpAdd, src, mul, dst, 0, 0, 0, 0, 0, 0, w, h);
201	}	430	}
202
203	bool
204	rxvt_img::render_pixbuf (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y)
205	{
206	bool argb = format->id == PictStandardARGB32;
207
208	Display *dpy = s->display->dpy;
209
210	if (s->visual->c_class != TrueColor)
211	return false;
212
213	uint32_t red_mask, green_mask, blue_mask, alpha_mask;
214
215	if (argb)
216	{	431	}
217	red_mask = 0xff << 16;	432
218	green_mask = 0xff << 8;	433	XRenderFreePicture (dpy, mul);
219	blue_mask = 0xff;	434	XRenderFreePicture (dpy, dst);
220	alpha_mask = 0xff << 24;	435	XRenderFreePicture (dpy, src);
		436
		437	::swap (img->ref, ref);
		438	::swap (img->pm , pm );
		439
		440	delete img;
		441	}
		442
		443	rxvt_img *
		444	rxvt_img::clone ()
		445	{
		446	return new rxvt_img (*this);
		447	}
		448
		449	static XRenderPictFormat *
		450	find_alpha_format_for (Display dpy, XRenderPictFormat format)
		451	{
		452	if (format->direct.alphaMask)
		453	return format; // already has alpha
		454
		455	// try to find a suitable alpha format, one bit alpha is enough for our purposes
		456	if (format->type == PictTypeDirect)
		457	for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
		458	if (f->direct.alphaMask
		459	&& f->type == PictTypeDirect
		460	&& ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
		461	&& ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
		462	&& ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
		463	return f;
		464
		465	// should be a very good fallback
		466	return XRenderFindStandardFormat (dpy, PictStandardARGB32);
		467	}
		468
		469	rxvt_img *
		470	rxvt_img::reify ()
		471	{
		472	if (x == 0 && y == 0 && w == ref->w && h == ref->h)
		473	return clone ();
		474
		475	Display *dpy = s->display->dpy;
		476
		477	// add an alpha channel if...
		478	bool alpha = !format->direct.alphaMask // pixmap has none yet
		479	&& (x \|\| y) // we need one because of non-zero offset
		480	&& repeat == RepeatNone; // and we have no good pixels to fill with
		481
		482	rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat);
		483	img->alloc ();
		484
		485	Picture src = src_picture ();
		486	Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
		487
		488	if (alpha)
		489	{
		490	XRenderColor rc = { 0, 0, 0, 0 };
		491	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
		492	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h);
221	}	493	}
222	else	494	else
223	{	495	XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h);
224	red_mask = s->visual->red_mask;	496
225	green_mask = s->visual->green_mask;	497	XRenderFreePicture (dpy, src);
226	blue_mask = s->visual->blue_mask;	498	XRenderFreePicture (dpy, dst);
227	alpha_mask = (uint32_t)format->direct.alphaMask << format->direct.alpha;	499
		500	return img;
		501	}
		502
		503	rxvt_img *
		504	rxvt_img::sub_rect (int x, int y, int width, int height)
		505	{
		506	rxvt_img *img = clone ();
		507
		508	img->x += x;
		509	img->y += y;
		510
		511	if (w != width \|\| h != height)
228	}	512	{
		513	img->w = width;
		514	img->h = height;
229		515
230	int width_r = ecb_popcount32 (red_mask);	516	rxvt_img *img2 = img->reify ();
231	int width_g = ecb_popcount32 (green_mask);	517	delete img;
232	int width_b = ecb_popcount32 (blue_mask);	518	img = img2;
233	int width_a = ecb_popcount32 (alpha_mask);
234
235	if (width_r > 8 \|\| width_g > 8 \|\| width_b > 8 \|\| width_a > 8)
236	return false;
237
238	int sh_r = ecb_ctz32 (red_mask);
239	int sh_g = ecb_ctz32 (green_mask);
240	int sh_b = ecb_ctz32 (blue_mask);
241	int sh_a = ecb_ctz32 (alpha_mask);
242
243	if (width > 32767 \|\| height > 32767)
244	return false;
245
246	XImage *ximage = XCreateImage (dpy, s->visual, argb ? 32 : format->depth, ZPixmap, 0, 0,
247	width, height, 32, 0);
248	if (!ximage)
249	return false;
250
251	if (height > INT_MAX / ximage->bytes_per_line
252	\|\| !(ximage->data = (char )malloc (height ximage->bytes_per_line)))
253	{	519	}
254	XDestroyImage (ximage);
255	return false;
256	}
257		520
258	GC gc = XCreateGC (dpy, pm, 0, 0);	521	return img;
259
260	ximage->byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
261
262	int rowstride = gdk_pixbuf_get_rowstride (pixbuf);
263	int channels = gdk_pixbuf_get_n_channels (pixbuf);
264	unsigned char row = gdk_pixbuf_get_pixels (pixbuf) + src_y rowstride + src_x * channels;
265	char *line = ximage->data;
266
267	rgba c (0, 0, 0);
268
269	if (channels == 4 && alpha_mask == 0)
270	{
271	//pix_colors[Color_bg].get (c);
272	//TODO
273	c.r = 0xffff; c.g = 0xc0c0; c.b = 0xcbcb;//D
274	c.r >>= 8;
275	c.g >>= 8;
276	c.b >>= 8;
277	}
278
279	for (int y = 0; y < height; y++)
280	{
281	for (int x = 0; x < width; x++)
282	{
283	unsigned char pixel = row + x channels;
284	uint32_t value;
285	unsigned char r, g, b, a;
286
287	if (channels == 4)
288	{
289	a = pixel[3];
290	r = (pixel[0] * a + c.r * (0xff - a)) / 0xff;
291	g = (pixel[1] * a + c.g * (0xff - a)) / 0xff;
292	b = (pixel[2] * a + c.b * (0xff - a)) / 0xff;
293	}
294	else
295	{
296	a = 0xff;
297	r = pixel[0];
298	g = pixel[1];
299	b = pixel[2];
300	}
301
302	value = ((r >> (8 - width_r)) << sh_r)
303	\| ((g >> (8 - width_g)) << sh_g)
304	\| ((b >> (8 - width_b)) << sh_b)
305	\| ((a >> (8 - width_a)) << sh_a);
306
307	if (ximage->bits_per_pixel == 32)
308	((uint32_t *)line)[x] = value;
309	else
310	XPutPixel (ximage, x, y, value);
311	}
312
313	row += rowstride;
314	line += ximage->bytes_per_line;
315	}
316
317	XPutImage (dpy, pm, gc, ximage, 0, 0, dst_x, dst_y, width, height);
318	XDestroyImage (ximage);
319	XFreeGC (dpy, gc);
320
321	return true;
322	}	522	}
323		523
324	rxvt_img *	524	rxvt_img *
325	rxvt_img::clone ()	525	rxvt_img::transform (double matrix[9], int new_width, int new_height)
326	{	526	{
327	GC gc = XCreateGC (s->display->dpy, pm, 0, 0);
328	Pixmap pm2 = XCreatePixmap (s->display->dpy, pm, w, h, format->depth);
329	XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, w, h, 0, 0);
330	XFreeGC (s->display->dpy, gc);
331	return new rxvt_img (s, format, w, h, pm2);
332	}
333
334	rxvt_img *
335	rxvt_img::transform (int new_width, int new_height, int repeat, double matrix[9])
336	{
337	rxvt_img *img = new rxvt_img (s, format, new_width, new_height);	527	rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat);
		528	img->alloc ();
338		529
339	Display *dpy = s->display->dpy;	530	Display *dpy = s->display->dpy;
340	XRenderPictureAttributes pa;	531	Picture src = src_picture ();
341	pa.repeat = repeat;
342	Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
343	Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);	532	Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
344		533
345	XTransform xfrm;	534	XTransform xfrm;
346		535
347	for (int i = 0; i < 3; ++i)	536	for (int i = 0; i < 3; ++i)
348	for (int j = 0; j < 3; ++j)	537	for (int j = 0; j < 3; ++j)
349	xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);	538	xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]);
350		539
		540	xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
		541	xfrm.matrix [1][2] -= XDoubleToFixed (y);
		542
351	XRenderSetPictureFilter (dpy, src, "good", 0, 0);	543	XRenderSetPictureFilter (dpy, src, "good", 0, 0);
352	XRenderSetPictureTransform (dpy, src, &xfrm);	544	XRenderSetPictureTransform (dpy, src, &xfrm);
353	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);	545	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height);
354		546
355	XRenderFreePicture (dpy, src);	547	XRenderFreePicture (dpy, src);
…		…
359	}	551	}
360		552
361	rxvt_img *	553	rxvt_img *
362	rxvt_img::scale (int new_width, int new_height)	554	rxvt_img::scale (int new_width, int new_height)
363	{	555	{
		556	if (w == new_width && h == new_height)
		557	return clone ();
		558
364	double matrix[9] = {	559	double matrix[9] = {
365	w / (double)new_width, 0, 0,	560	w / (double)new_width, 0, 0,
366	0, h / (double)new_height, 0,	561	0, h / (double)new_height, 0,
367	0, 0, 1	562	0, 0, 1
368	};	563	};
369		564
370	return transform (new_width, new_height, RepeatNormal, matrix);	565	int old_repeat_mode = repeat;
371	}	566	repeat = RepeatPad; // not right, but xrender can't properly scale it seems
372		567
		568	rxvt_img *img = transform (matrix, new_width, new_height);
		569
		570	repeat = old_repeat_mode;
		571	img->repeat = repeat;
		572
		573	return img;
		574	}
		575
373	rxvt_img *	576	rxvt_img *
374	rxvt_img::rotate (int new_width, int new_height, int repeat, int x, int y, double phi)	577	rxvt_img::rotate (int x, int y, double phi, int new_width, int new_height)
375	{	578	{
376	double s = sin (phi);	579	double s = sin (phi);
377	double c = cos (phi);	580	double c = cos (phi);
378		581
379	double matrix[9] = {	582	double matrix[9] = {
380	c, -s, -c * x + s * y + x,	583	c, -s, -c * x + s * y + x,
381	s, c, -s * x - c * y + y,	584	s, c, -s * x - c * y + y,
382	0, 0, 1	585	0, 0, 1
383	};	586	};
384		587
385	return transform (new_width, new_height, repeat, matrix);	588	return transform (matrix, new_width, new_height);
386	}	589	}
387		590
388	rxvt_img *	591	rxvt_img *
389	rxvt_img::convert_to (XRenderPictFormat *new_format)	592	rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg)
390	{	593	{
		594	if (new_format == format)
		595	return clone ();
		596
391	rxvt_img *img = new rxvt_img (s, new_format, w, h);	597	rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat);
		598	img->alloc ();
392		599
393	Display *dpy = s->display->dpy;	600	Display *dpy = s->display->dpy;
394	Picture src = XRenderCreatePicture (dpy, pm, format, 0, 0);	601	Picture src = src_picture ();
395	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);	602	Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
		603	int op = PictOpSrc;
396		604
		605	if (format->direct.alphaMask && !new_format->direct.alphaMask)
		606	{
		607	// does it have to be that complicated
		608	rgba c;
		609	bg.get (c);
		610
		611	XRenderColor rc = { c.r, c.g, c.b, 0xffff };
		612	XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);
		613
		614	op = PictOpOver;
		615	}
		616
397	XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);	617	XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h);
398		618
399	XRenderFreePicture (dpy, src);	619	XRenderFreePicture (dpy, src);
400	XRenderFreePicture (dpy, dst);	620	XRenderFreePicture (dpy, dst);
401		621
402	return img;	622	return img;
403	}	623	}
404		624
		625	rxvt_img *
		626	rxvt_img::blend (rxvt_img *img, double factor)
		627	{
		628	rxvt_img *img2 = clone ();
		629	Display *dpy = s->display->dpy;
		630	Picture src = img->src_picture ();
		631	Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
		632	Picture mask = create_xrender_mask (dpy, img->pm, False, False);
		633
		634	XRenderColor mask_c;
		635
		636	mask_c.alpha = float_to_component (factor);
		637	mask_c.red =
		638	mask_c.green =
		639	mask_c.blue = 0;
		640	XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
		641
		642	XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h);
		643
		644	XRenderFreePicture (dpy, src);
		645	XRenderFreePicture (dpy, dst);
		646	XRenderFreePicture (dpy, mask);
		647
		648	return img2;
		649	}
		650
405	#endif	651	#endif
406		652

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Comparing rxvt-unicode/src/rxvtimg.C (file contents): Revision 1.17 by root, Mon Jun 4 18:17:25 2012 UTC vs. Revision 1.79 by root, Tue Jun 12 10:45:53 2012 UTC

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Comparing rxvt-unicode/src/rxvtimg.C (file contents):
Revision 1.17 by root, Mon Jun 4 18:17:25 2012 UTC vs.
Revision 1.79 by root, Tue Jun 12 10:45:53 2012 UTC