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Comparing rxvt-unicode/src/rxvtimg.C (file contents):
Revision 1.45 by root, Thu Jun 7 17:21:56 2012 UTC vs.
Revision 1.109 by sf-exg, Sat Jul 15 08:16:31 2017 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
31typedef rxvt_img::nv nv;
32
33namespace
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->d->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 // the casts are needed in C++11 (see 8.5.1)
194 XRenderColor rc = {
195 (unsigned short)(c.r * c.a / 65535),
196 (unsigned short)(c.g * c.a / 65535),
197 (unsigned short)(c.b * c.a / 65535),
198 c.a
199 };
200 msk = XRenderCreateSolidFill (dpy, &rc);
201 ecb_assume (msk);
202 }
203
204 void fill (const rgba &c)
205 {
206 XRenderColor rc = {
207 (unsigned short)(c.r * c.a / 65535),
208 (unsigned short)(c.g * c.a / 65535),
209 (unsigned short)(c.b * c.a / 65535),
210 c.a
211 };
212
213 XRenderFillRectangle (dpy, PictOpSrc, msk, &rc, 0, 0, 1, 1);
214 }
215
216 operator rxvt_img *()
217 {
218 return dstimg;
219 }
220
221 ecb_noinline
222 ~composer ()
223 {
224 XRenderFreePicture (dpy, src);
225 XRenderFreePicture (dpy, dst);
226 if (msk) XRenderFreePicture (dpy, msk);
227 }
228 };
229}
230
231static XRenderPictFormat *
232find_alpha_format_for (Display *dpy, XRenderPictFormat *format)
233{
234 if (format->direct.alphaMask)
235 return format; // already has alpha
236
237 // try to find a suitable alpha format, one bit alpha is enough for our purposes
238 if (format->type == PictTypeDirect)
239 for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
240 if (f->direct.alphaMask
241 && f->type == PictTypeDirect
242 && ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
243 && ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
244 && ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
245 return f;
246
247 // should be a very good fallback
248 return XRenderFindStandardFormat (dpy, PictStandardARGB32);
249}
250
7rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height, int repeat) 251rxvt_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), 252: d(screen->display), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
9 pm(0), ref(0) 253 pm(0), ref(0)
10{ 254{
11} 255}
12 256
257rxvt_img::rxvt_img (rxvt_display *display, XRenderPictFormat *format, int x, int y, int width, int height, int repeat)
258: d(display), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
259 pm(0), ref(0)
260{
261}
262
13rxvt_img::rxvt_img (const rxvt_img &img) 263rxvt_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) 264: d(img.d), 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{ 265{
16 ++ref->cnt; 266 ++ref->cnt;
17} 267}
18 268
19#if 0
20rxvt_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
26rxvt_img * 269rxvt_img *
27rxvt_img::new_from_root (rxvt_screen *s) 270rxvt_img::new_from_root (rxvt_screen *s)
28{ 271{
29 Display *dpy = s->display->dpy; 272 Display *dpy = s->dpy;
30 unsigned int root_pm_w, root_pm_h; 273 unsigned int root_pm_w, root_pm_h;
31 Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_XROOTPMAP_ID]); 274 Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa [XA_XROOTPMAP_ID]);
32 if (root_pixmap == None) 275 if (root_pixmap == None)
33 root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_ESETROOT_PMAP_ID]); 276 root_pixmap = s->display->get_pixmap_property (s->display->xa [XA_ESETROOT_PMAP_ID]);
34 277
35 if (root_pixmap == None) 278 if (root_pixmap == None)
36 return 0; 279 return 0;
37 280
38 Window wdummy; 281 Window wdummy;
… …
56 img->ref->ours = false; 299 img->ref->ours = false;
57 300
58 return img; 301 return img;
59} 302}
60 303
304# if HAVE_PIXBUF
305
306rxvt_img *
307rxvt_img::new_from_pixbuf (rxvt_screen *s, GdkPixbuf *pb)
308{
309 Display *dpy = s->dpy;
310
311 int width = gdk_pixbuf_get_width (pb);
312 int height = gdk_pixbuf_get_height (pb);
313
314 if (width > 32767 || height > 32767) // well, we *could* upload in chunks
315 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
316
317 // since we require rgb24/argb32 formats from xrender we assume
318 // that both 24 and 32 bpp MUST be supported by any screen that supports xrender
319
320 int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
321
322 XImage xi;
323
324 xi.width = width;
325 xi.height = height;
326 xi.xoffset = 0;
327 xi.format = ZPixmap;
328 xi.byte_order = ImageByteOrder (dpy);
329 xi.bitmap_unit = 0; //XY only, unused
330 xi.bitmap_bit_order = 0; //XY only, unused
331 xi.bitmap_pad = BitmapPad (dpy);
332 xi.depth = 32;
333 xi.bytes_per_line = 0;
334 xi.bits_per_pixel = 32; //Z only
335 xi.red_mask = 0x00000000; //Z only, unused
336 xi.green_mask = 0x00000000; //Z only, unused
337 xi.blue_mask = 0x00000000; //Z only, unused
338 xi.obdata = 0; // probably unused
339
340 bool byte_order_mismatch = byte_order != xi.byte_order;
341
342 if (!XInitImage (&xi))
343 rxvt_fatal ("unable to initialise ximage, please report.\n");
344
345 if (height > INT_MAX / xi.bytes_per_line)
346 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
347
348 xi.data = (char *)rxvt_malloc (height * xi.bytes_per_line);
349
350 int rowstride = gdk_pixbuf_get_rowstride (pb);
351 bool pb_has_alpha = gdk_pixbuf_get_has_alpha (pb);
352 unsigned char *row = gdk_pixbuf_get_pixels (pb);
353
354 char *line = xi.data;
355
356 for (int y = 0; y < height; y++)
357 {
358 unsigned char *src = row;
359 uint32_t *dst = (uint32_t *)line;
360
361 for (int x = 0; x < width; x++)
362 {
363 uint8_t r = *src++;
364 uint8_t g = *src++;
365 uint8_t b = *src++;
366 uint8_t a = *src;
367
368 // this is done so it can be jump-free, but newer gcc's clone inner the loop
369 a = pb_has_alpha ? a : 255;
370 src += pb_has_alpha;
371
372 r = (r * a + 127) / 255;
373 g = (g * a + 127) / 255;
374 b = (b * a + 127) / 255;
375
376 uint32_t v = (a << 24) | (r << 16) | (g << 8) | b;
377
378 if (ecb_big_endian () ? !byte_order_mismatch : byte_order_mismatch)
379 v = ecb_bswap32 (v);
380
381 *dst++ = v;
382 }
383
384 row += rowstride;
385 line += xi.bytes_per_line;
386 }
387
388 rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, PictStandardARGB32), 0, 0, width, height);
389 img->alloc ();
390
391 GC gc = XCreateGC (dpy, img->pm, 0, 0);
392 XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
393 XFreeGC (dpy, gc);
394
395 free (xi.data);
396
397 return img;
398}
399
61rxvt_img * 400rxvt_img *
62rxvt_img::new_from_file (rxvt_screen *s, const char *filename) 401rxvt_img::new_from_file (rxvt_screen *s, const char *filename)
63{ 402{
64 GError *err = 0; 403 GError *err = 0;
65 GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err); 404 GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
66 405
67 if (!pb) 406 if (!pb)
68 rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message); 407 rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
69 408
70 rxvt_img *img = new rxvt_img ( 409 rxvt_img *img = new_from_pixbuf (s, pb);
71 s,
72 XRenderFindStandardFormat (s->display->dpy, gdk_pixbuf_get_has_alpha (pb) ? PictStandardARGB32 : PictStandardRGB24),
73 0,
74 0,
75 gdk_pixbuf_get_width (pb),
76 gdk_pixbuf_get_height (pb)
77 );
78 img->alloc ();
79 img->render_pixbuf (pb, 0, 0, img->w, img->h, 0, 0);
80 410
81 g_object_unref (pb); 411 g_object_unref (pb);
82 412
83 return img; 413 return img;
84} 414}
415
416# endif
85 417
86void 418void
87rxvt_img::destroy () 419rxvt_img::destroy ()
88{ 420{
89 if (--ref->cnt) 421 if (--ref->cnt)
90 return; 422 return;
91 423
92 if (pm && ref->ours) 424 if (pm && ref->ours)
93 XFreePixmap (s->display->dpy, pm); 425 XFreePixmap (d->dpy, pm);
94 426
95 delete ref; 427 delete ref;
96} 428}
97 429
98rxvt_img::~rxvt_img () 430rxvt_img::~rxvt_img ()
… …
101} 433}
102 434
103void 435void
104rxvt_img::alloc () 436rxvt_img::alloc ()
105{ 437{
106 pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth); 438 pm = XCreatePixmap (d->dpy, d->root, w, h, format->depth);
107 ref = new pixref (w, h); 439 ref = new pixref (w, h);
108} 440}
109 441
442rxvt_img *
443rxvt_img::new_empty ()
444{
445 rxvt_img *img = new rxvt_img (d, format, x, y, w, h, repeat);
446 img->alloc ();
447
448 return img;
449}
450
110Picture 451Picture
111rxvt_img::src_picture () 452rxvt_img::picture ()
112{ 453{
113 Display *dpy = s->display->dpy; 454 Display *dpy = d->dpy;
114 455
115 XRenderPictureAttributes pa; 456 XRenderPictureAttributes pa;
116 pa.repeat = repeat; 457 pa.repeat = repeat;
117 Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa); 458 Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
118 459
… …
123rxvt_img::unshare () 464rxvt_img::unshare ()
124{ 465{
125 if (ref->cnt == 1 && ref->ours) 466 if (ref->cnt == 1 && ref->ours)
126 return; 467 return;
127 468
128 //TODO: maybe should reify instead
129 Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth); 469 Pixmap pm2 = XCreatePixmap (d->dpy, d->root, ref->w, ref->h, format->depth);
130 GC gc = XCreateGC (s->display->dpy, pm, 0, 0); 470 GC gc = XCreateGC (d->dpy, pm, 0, 0);
131 XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0); 471 XCopyArea (d->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
132 XFreeGC (s->display->dpy, gc); 472 XFreeGC (d->dpy, gc);
133 473
134 destroy (); 474 destroy ();
135 475
136 pm = pm2; 476 pm = pm2;
137 ref = new pixref (ref->w, ref->h); 477 ref = new pixref (ref->w, ref->h);
138} 478}
139 479
140void 480void
481rxvt_img::fill (const rgba &c, int x, int y, int w, int h)
482{
483 XRenderColor rc = { c.r, c.g, c.b, c.a };
484
485 Display *dpy = d->dpy;
486 Picture src = picture ();
487 XRenderFillRectangle (dpy, PictOpSrc, src, &rc, x, y, w, h);
488 XRenderFreePicture (dpy, src);
489}
490
491void
141rxvt_img::fill (const rxvt_color &c) 492rxvt_img::fill (const rgba &c)
142{ 493{
143 XGCValues gcv; 494 fill (c, 0, 0, w, h);
144 gcv.foreground = c; 495}
145 GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv); 496
146 XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h); 497void
147 XFreeGC (s->display->dpy, gc); 498rxvt_img::add_alpha ()
499{
500 if (format->direct.alphaMask)
501 return;
502
503 composer cc (this, new rxvt_img (d, find_alpha_format_for (d->dpy, format), x, y, w, h, repeat));
504
505 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
506
507 rxvt_img *img = cc;
508
509 ::swap (img->ref, ref);
510 ::swap (img->pm , pm );
511
512 delete img;
148} 513}
149 514
150static void 515static void
151get_gaussian_kernel (int radius, int width, double *kernel, XFixed *params) 516get_gaussian_kernel (int radius, int width, nv *kernel, XFixed *params)
152{ 517{
153 double sigma = radius / 2.0; 518 nv sigma = radius / 2.0;
154 double scale = sqrt (2.0 * M_PI) * sigma; 519 nv scale = sqrt (2.0 * M_PI) * sigma;
155 double sum = 0.0; 520 nv sum = 0.0;
156 521
157 for (int i = 0; i < width; i++) 522 for (int i = 0; i < width; i++)
158 { 523 {
159 double x = i - width / 2; 524 nv x = i - width / 2;
160 kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale; 525 kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
161 sum += kernel[i]; 526 sum += kernel[i];
162 } 527 }
163 528
164 params[0] = XDoubleToFixed (width); 529 params[0] = XDoubleToFixed (width);
… …
169} 534}
170 535
171rxvt_img * 536rxvt_img *
172rxvt_img::blur (int rh, int rv) 537rxvt_img::blur (int rh, int rv)
173{ 538{
174 if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV)) 539 if (!(d->flags & DISPLAY_HAS_RENDER_CONV))
175 return clone (); 540 return clone ();
176 541
177 Display *dpy = s->display->dpy; 542 Display *dpy = d->dpy;
178 int size = max (rh, rv) * 2 + 1; 543 int size = max (rh, rv) * 2 + 1;
179 double *kernel = (double *)malloc (size * sizeof (double)); 544 nv *kernel = (nv *)malloc (size * sizeof (nv));
180 XFixed *params = (XFixed *)malloc ((size + 2) * sizeof (XFixed)); 545 XFixed *params = rxvt_temp_buf<XFixed> (size + 2);
181 rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat); 546 rxvt_img *img = new_empty ();
182 img->alloc ();
183
184 Picture src = src_picture ();
185 547
186 XRenderPictureAttributes pa; 548 XRenderPictureAttributes pa;
187 pa.repeat = RepeatPad; 549 pa.repeat = RepeatPad;
188 Picture dst = XRenderCreatePicture (dpy, img->pm, format, CPRepeat, &pa); 550 Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
551 Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
189 552
190 Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth); 553 Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
191 Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa); 554 Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
192 XFreePixmap (dpy, tmp_pm); 555 XFreePixmap (dpy, tmp_pm);
193 556
… …
209 572
210 size = rv * 2 + 1; 573 size = rv * 2 + 1;
211 get_gaussian_kernel (rv, size, kernel, params); 574 get_gaussian_kernel (rv, size, kernel, params);
212 ::swap (params[0], params[1]); 575 ::swap (params[0], params[1]);
213 576
214 XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2); 577 XRenderSetPictureFilter (dpy, tmp, FilterConvolution, params, size+2);
215 XRenderComposite (dpy, 578 XRenderComposite (dpy,
216 PictOpSrc, 579 PictOpSrc,
217 tmp, 580 tmp,
218 None, 581 None,
219 dst, 582 dst,
… …
222 0, 0, 585 0, 0,
223 w, h); 586 w, h);
224 } 587 }
225 588
226 free (kernel); 589 free (kernel);
227 free (params); 590
228 XRenderFreePicture (dpy, src); 591 XRenderFreePicture (dpy, src);
229 XRenderFreePicture (dpy, dst); 592 XRenderFreePicture (dpy, dst);
230 XRenderFreePicture (dpy, tmp); 593 XRenderFreePicture (dpy, tmp);
231 594
232 return img; 595 return img;
233} 596}
234 597
235static Picture 598rxvt_img *
236create_xrender_mask (Display *dpy, Drawable drawable, Bool argb) 599rxvt_img::muladd (nv mul, nv add)
237{ 600{
238 Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8); 601 // STEP 1: double the image width, fill all odd columns with white (==1)
239 602
240 XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8); 603 composer cc (this, new rxvt_img (d, format, 0, 0, w * 2, h, repeat));
241 XRenderPictureAttributes pa;
242 pa.repeat = True;
243 Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
244 604
245 XFreePixmap (dpy, pixmap); 605 // why the hell does XRenderSetPictureTransform want a writable matrix :(
606 // that keeps us from just static const'ing this matrix.
607 XTransform h_double = {
608 0x08000, 0, 0,
609 0, 0x10000, 0,
610 0, 0, 0x10000
611 };
246 612
247 return mask; 613 XRenderSetPictureFilter (cc.dpy, cc.src, "nearest", 0, 0);
614 XRenderSetPictureTransform (cc.dpy, cc.src, &h_double);
615 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
616
617 cc.mask (false, 2, 1);
618
619 static const XRenderColor c0 = { 0, 0, 0, 0 };
620 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &c0, 0, 0, 1, 1);
621 static const XRenderColor c1 = { 65535, 65535, 65535, 65535 };
622 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &c1, 1, 0, 1, 1);
623
624 Picture white = XRenderCreateSolidFill (cc.dpy, &c1);
625
626 XRenderComposite (cc.dpy, PictOpOver, white, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
627
628 XRenderFreePicture (cc.dpy, white);
629
630 // STEP 2: convolve the image with a 3x1 filter
631 // a 2x1 filter would obviously suffice, but given the total lack of specification
632 // for xrender, I expect different xrender implementations to randomly diverge.
633 // we also halve the image, and hope for the best (again, for lack of specs).
634 composer cc2 (cc.dstimg);
635
636 XFixed kernel [] = {
637 XDoubleToFixed (3), XDoubleToFixed (1),
638 XDoubleToFixed (0), XDoubleToFixed (mul), XDoubleToFixed (add)
639 };
640
641 XTransform h_halve = {
642 0x20000, 0, 0,
643 0, 0x10000, 0,
644 0, 0, 0x10000
645 };
646
647 XRenderSetPictureFilter (cc.dpy, cc2.src, "nearest", 0, 0);
648 XRenderSetPictureTransform (cc.dpy, cc2.src, &h_halve);
649 XRenderSetPictureFilter (cc.dpy, cc2.src, FilterConvolution, kernel, ecb_array_length (kernel));
650
651 XRenderComposite (cc.dpy, PictOpSrc, cc2.src, None, cc2.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
652
653 return cc2;
654}
655
656ecb_noinline static void
657extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc)
658{
659 int32_t x = clamp (c, cl0, cl1);
660 c -= x;
661 xc = x;
662}
663
664ecb_noinline static bool
665extract (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)
666{
667 extract (cl0, cl1, r, xr);
668 extract (cl0, cl1, g, xg);
669 extract (cl0, cl1, b, xb);
670 extract (cl0, cl1, a, xa);
671
672 return xr | xg | xb | xa;
248} 673}
249 674
250void 675void
251rxvt_img::brightness (unsigned short r, unsigned short g, unsigned short b, unsigned short a) 676rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a)
252{ 677{
678 unshare ();
679
253 Display *dpy = s->display->dpy; 680 Display *dpy = d->dpy;
254 Picture src = create_xrender_mask (dpy, pm, True);
255 Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); 681 Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
256 682
683 // loop should not be needed for brightness, as only -1..1 makes sense
684 //while (r | g | b | a)
685 {
686 unsigned short xr, xg, xb, xa;
257 XRenderColor mask_c; 687 XRenderColor mask_c;
258 mask_c.red = r; 688
259 mask_c.green = g; 689 if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
260 mask_c.blue = b;
261 mask_c.alpha = a;
262 XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1); 690 XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
263 691
264 XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h); 692 if (extract (-65535, 0, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
693 {
694 XRenderColor mask_w = { 65535, 65535, 65535, 65535 };
695 XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
696 mask_c.red = -mask_c.red; //TODO: verify that doing clamp, assign, and negation does the right thing
697 mask_c.green = -mask_c.green;
698 mask_c.blue = -mask_c.blue;
699 mask_c.alpha = -mask_c.alpha;
700 XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
701 XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
702 }
703 }
265 704
266 XRenderFreePicture (dpy, src);
267 XRenderFreePicture (dpy, dst); 705 XRenderFreePicture (dpy, dst);
268} 706}
269 707
270void 708void
271rxvt_img::contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short a) 709rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a)
272{ 710{
273 if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL)) 711 if (r < 0 || g < 0 || b < 0 || a < 0)
274 return; 712 rxvt_fatal ("rxvt_img::contrast does not support negative values.\n");
275 713
276 Display *dpy = s->display->dpy; 714 // premultiply (yeah, these are not exact, sue me or fix it)
277 Picture src = create_xrender_mask (dpy, pm, True); 715 r = (r * (a >> 8)) >> 8;
278 Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); 716 g = (g * (a >> 8)) >> 8;
717 b = (b * (a >> 8)) >> 8;
279 718
719 composer cc (this);
720 rxvt_img *img = cc;
721 img->fill (rgba (0, 0, 0, 0));
722
723 cc.mask (true);
724
725 //TODO: this operator does not yet implement some useful contrast
726 while (r | g | b | a)
727 {
728 unsigned short xr, xg, xb, xa;
280 XRenderColor mask_c; 729 XRenderColor mask_c;
281 mask_c.red = r;
282 mask_c.green = g;
283 mask_c.blue = b;
284 mask_c.alpha = a;
285 XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1);
286 730
287 XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h); 731 if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
288
289 XRenderFreePicture (dpy, src);
290 XRenderFreePicture (dpy, dst);
291}
292
293bool
294rxvt_img::render_pixbuf (GdkPixbuf *pixbuf, int src_x, int src_y, int width, int height, int dst_x, int dst_y)
295{
296 Display *dpy = s->display->dpy;
297
298 if (s->visual->c_class != TrueColor)
299 return false;
300
301 uint32_t red_mask, green_mask, blue_mask, alpha_mask;
302
303 red_mask = (uint32_t)format->direct.redMask << format->direct.red;
304 green_mask = (uint32_t)format->direct.greenMask << format->direct.green;
305 blue_mask = (uint32_t)format->direct.blueMask << format->direct.blue;
306 alpha_mask = (uint32_t)format->direct.alphaMask << format->direct.alpha;
307
308 int width_r = ecb_popcount32 (red_mask);
309 int width_g = ecb_popcount32 (green_mask);
310 int width_b = ecb_popcount32 (blue_mask);
311 int width_a = ecb_popcount32 (alpha_mask);
312
313 if (width_r > 8 || width_g > 8 || width_b > 8 || width_a > 8)
314 return false;
315
316 int sh_r = ecb_ctz32 (red_mask);
317 int sh_g = ecb_ctz32 (green_mask);
318 int sh_b = ecb_ctz32 (blue_mask);
319 int sh_a = ecb_ctz32 (alpha_mask);
320
321 if (width > 32767 || height > 32767)
322 return false;
323
324 XImage *ximage = XCreateImage (dpy, s->visual, format->depth, ZPixmap, 0, 0,
325 width, height, 32, 0);
326 if (!ximage)
327 return false;
328
329 if (height > INT_MAX / ximage->bytes_per_line
330 || !(ximage->data = (char *)malloc (height * ximage->bytes_per_line)))
331 {
332 XDestroyImage (ximage);
333 return false;
334 }
335
336 GC gc = XCreateGC (dpy, pm, 0, 0);
337
338 ximage->byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
339
340 int rowstride = gdk_pixbuf_get_rowstride (pixbuf);
341 int channels = gdk_pixbuf_get_n_channels (pixbuf);
342 unsigned char *row = gdk_pixbuf_get_pixels (pixbuf) + src_y * rowstride + src_x * channels;
343 char *line = ximage->data;
344
345 for (int y = 0; y < height; y++)
346 {
347 for (int x = 0; x < width; x++)
348 { 732 {
349 unsigned char *pixel = row + x * channels; 733 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &mask_c, 0, 0, 1, 1);
350 uint32_t value; 734 XRenderComposite (cc.dpy, PictOpAdd, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
351 unsigned char r, g, b, a;
352
353 if (channels == 4)
354 {
355 a = pixel[3];
356 r = pixel[0] * a / 0xff;
357 g = pixel[1] * a / 0xff;
358 b = pixel[2] * a / 0xff;
359 }
360 else
361 {
362 a = 0xff;
363 r = pixel[0];
364 g = pixel[1];
365 b = pixel[2];
366 }
367
368 value = ((r >> (8 - width_r)) << sh_r)
369 | ((g >> (8 - width_g)) << sh_g)
370 | ((b >> (8 - width_b)) << sh_b)
371 | ((a >> (8 - width_a)) << sh_a);
372
373 if (ximage->bits_per_pixel == 32)
374 ((uint32_t *)line)[x] = value;
375 else
376 XPutPixel (ximage, x, y, value);
377 } 735 }
378
379 row += rowstride;
380 line += ximage->bytes_per_line;
381 } 736 }
382 737
383 XPutImage (dpy, pm, gc, ximage, 0, 0, dst_x, dst_y, width, height); 738 ::swap (img->ref, ref);
384 XDestroyImage (ximage); 739 ::swap (img->pm , pm );
385 XFreeGC (dpy, gc);
386 740
387 return true; 741 delete img;
742}
743
744void
745rxvt_img::draw (rxvt_img *img, int op, nv mask)
746{
747 unshare ();
748
749 composer cc (img, this);
750
751 if (mask != 1.)
752 cc.mask (rgba (0, 0, 0, float_to_component (mask)));
753
754 XRenderComposite (cc.dpy, op, cc.src, cc.msk, cc.dst, x - img->x, y - img->y, 0, 0, 0, 0, w, h);
388} 755}
389 756
390rxvt_img * 757rxvt_img *
391rxvt_img::clone () 758rxvt_img::clone ()
392{ 759{
… …
397rxvt_img::reify () 764rxvt_img::reify ()
398{ 765{
399 if (x == 0 && y == 0 && w == ref->w && h == ref->h) 766 if (x == 0 && y == 0 && w == ref->w && h == ref->h)
400 return clone (); 767 return clone ();
401 768
402 Display *dpy = s->display->dpy; 769 // add an alpha channel if...
403
404 bool alpha = !format->direct.alphaMask 770 bool alpha = !format->direct.alphaMask // pixmap has none yet
405 && (x || y) 771 && (x || y) // we need one because of non-zero offset
406 && repeat == RepeatNone; 772 && repeat == RepeatNone; // and we have no good pixels to fill with
407 773
408 rxvt_img *img = new rxvt_img (s, alpha ? XRenderFindStandardFormat (dpy, PictStandardARGB32) : format, 0, 0, w, h, repeat); 774 composer cc (this, new rxvt_img (d, alpha ? find_alpha_format_for (d->dpy, format) : format,
409 img->alloc (); 775 0, 0, w, h, repeat));
410 776
411 Picture src = src_picture (); 777 if (repeat == RepeatNone)
412 Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
413
414 if (alpha)
415 { 778 {
416 XRenderColor rc = { 0, 0, 0, 0 }; 779 XRenderColor rc = { 0, 0, 0, 0 };
417 XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles 780 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
418 XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h); 781 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, x, y, ref->w, ref->h);
419 } 782 }
420 else 783 else
421 XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h); 784 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, -x, -y, 0, 0, 0, 0, w, h);
422 785
423 XRenderFreePicture (dpy, src);
424 XRenderFreePicture (dpy, dst);
425
426 return img; 786 return cc;
427} 787}
428 788
429rxvt_img * 789rxvt_img *
430rxvt_img::sub_rect (int x, int y, int width, int height) 790rxvt_img::sub_rect (int x, int y, int width, int height)
431{ 791{
432 rxvt_img *img = clone (); 792 rxvt_img *img = clone ();
433 793
434 img->x += x; 794 img->x -= x;
435 img->y += y; 795 img->y -= y;
436 796
437 if (w != width || h != height) 797 if (w != width || h != height)
438 { 798 {
439 img->w = width; 799 img->w = width;
440 img->h = height; 800 img->h = height;
… …
446 806
447 return img; 807 return img;
448} 808}
449 809
450rxvt_img * 810rxvt_img *
451rxvt_img::transform (int new_width, int new_height, double matrix[9]) 811rxvt_img::transform (const nv matrix[3][3])
452{ 812{
453 rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat); 813 return transform (mat3x3 (&matrix[0][0]));
454 img->alloc (); 814}
455 815
456 Display *dpy = s->display->dpy; 816rxvt_img *
457 Picture src = src_picture (); 817rxvt_img::transform (const nv *matrix)
458 Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0); 818{
819 mat3x3 m (matrix);
820
821 // calculate new pixel bounding box coordinates
822 nv rmin[2], rmax[2];
823
824 for (int i = 0; i < 2; ++i)
825 {
826 nv v;
827
828 v = m.apply1 (i, 0+x, 0+y); rmin [i] = rmax [i] = v;
829 v = m.apply1 (i, w+x, 0+y); min_it (rmin [i], v); max_it (rmax [i], v);
830 v = m.apply1 (i, 0+x, h+y); min_it (rmin [i], v); max_it (rmax [i], v);
831 v = m.apply1 (i, w+x, h+y); min_it (rmin [i], v); max_it (rmax [i], v);
832 }
833
834 float sx = rmin [0] - x;
835 float sy = rmin [1] - y;
836
837 // TODO: adjust matrix for subpixel accuracy
838 int nx = floor (rmin [0]);
839 int ny = floor (rmin [1]);
840
841 int new_width = ceil (rmax [0] - rmin [0]);
842 int new_height = ceil (rmax [1] - rmin [1]);
843
844 mat3x3 inv = (mat3x3::translate (-x, -y) * m * mat3x3::translate (x, y)).inverse ();
845
846 composer cc (this, new rxvt_img (d, format, nx, ny, new_width, new_height, repeat));
459 847
460 XTransform xfrm; 848 XTransform xfrm;
461 849
462 for (int i = 0; i < 3; ++i) 850 for (int i = 0; i < 3; ++i)
463 for (int j = 0; j < 3; ++j) 851 for (int j = 0; j < 3; ++j)
464 xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]); 852 xfrm.matrix [i][j] = XDoubleToFixed (inv [i][j]);
465 853
466#if 0
467 xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
468 xfrm.matrix [1][2] -= XDoubleToFixed (y);
469#endif
470
471 XRenderSetPictureFilter (dpy, src, "good", 0, 0); 854 XRenderSetPictureFilter (cc.dpy, cc.src, "good", 0, 0);
472 XRenderSetPictureTransform (dpy, src, &xfrm); 855 XRenderSetPictureTransform (cc.dpy, cc.src, &xfrm);
473 XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height); 856 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, sx, sy, 0, 0, 0, 0, new_width, new_height);
474 857
475 XRenderFreePicture (dpy, src);
476 XRenderFreePicture (dpy, dst);
477
478 return img; 858 return cc;
479} 859}
480 860
481rxvt_img * 861rxvt_img *
482rxvt_img::scale (int new_width, int new_height) 862rxvt_img::scale (int new_width, int new_height)
483{ 863{
484 if (w == new_width && h == new_height) 864 if (w == new_width && h == new_height)
485 return clone (); 865 return clone ();
486 866
487 double matrix[9] = {
488 w / (double)new_width, 0, 0,
489 0, h / (double)new_height, 0,
490 0, 0, 1
491 };
492
493 int old_repeat_mode = repeat; 867 int old_repeat_mode = repeat;
494 repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems 868 repeat = RepeatPad; // not right, but xrender can't properly scale it seems
495 869
496 rxvt_img *img = transform (new_width, new_height, matrix); 870 rxvt_img *img = transform (mat3x3::scale (new_width / (nv)w, new_height / (nv)h));
497 871
498 repeat = old_repeat_mode; 872 repeat = old_repeat_mode;
499 img->repeat = repeat; 873 img->repeat = repeat;
500 874
501 return img; 875 return img;
502} 876}
503 877
504rxvt_img * 878rxvt_img *
505rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi) 879rxvt_img::rotate (int cx, int cy, nv phi)
506{ 880{
507 double s = sin (phi); 881 move (-cx, -cy);
508 double c = cos (phi); 882 rxvt_img *img = transform (mat3x3::rotate (phi));
883 move ( cx, cy);
884 img->move (cx, cy);
509 885
510 double matrix[9] = { 886 return img;
511 c, -s, -c * x + s * y + x,
512 s, c, -s * x - c * y + y,
513 0, 0, 1
514 };
515
516 return transform (new_width, new_height, matrix);
517} 887}
518 888
519rxvt_img * 889rxvt_img *
520rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg) 890rxvt_img::convert_format (XRenderPictFormat *new_format, const rgba &bg)
521{ 891{
522 if (new_format == format) 892 if (new_format == format)
523 return clone (); 893 return clone ();
524 894
525 rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat); 895 composer cc (this, new rxvt_img (d, new_format, x, y, w, h, repeat));
526 img->alloc ();
527 896
528 Display *dpy = s->display->dpy;
529 Picture src = src_picture ();
530 Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
531 int op = PictOpSrc; 897 int op = PictOpSrc;
532 898
533 if (format->direct.alphaMask && !new_format->direct.alphaMask) 899 if (format->direct.alphaMask && !new_format->direct.alphaMask)
534 { 900 {
535 // does it have to be that complicated 901 // does it have to be that complicated
536 rgba c;
537 bg.get (c);
538
539 XRenderColor rc = { c.r, c.g, c.b, 0xffff }; 902 XRenderColor rc = { bg.r, bg.g, bg.b, bg.a };
540 XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h); 903 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);
541 904
542 op = PictOpOver; 905 op = PictOpOver;
543 } 906 }
544 907
545 XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h); 908 XRenderComposite (cc.dpy, op, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
546 909
547 XRenderFreePicture (dpy, src); 910 return cc;
548 XRenderFreePicture (dpy, dst); 911}
912
913rxvt_img *
914rxvt_img::tint (const rgba &c)
915{
916 composer cc (this);
917 cc.mask (true);
918 cc.fill (c);
919
920 XRenderComposite (cc.dpy, PictOpSrc, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
921
922 return cc;
923}
924
925rxvt_img *
926rxvt_img::shade (nv factor, rgba c)
927{
928 clamp_it (factor, -1., 1.);
929 factor++;
930
931 if (factor > 1)
932 {
933 c.r = c.r * (2 - factor);
934 c.g = c.g * (2 - factor);
935 c.b = c.b * (2 - factor);
936 }
937 else
938 {
939 c.r = c.r * factor;
940 c.g = c.g * factor;
941 c.b = c.b * factor;
942 }
943
944 rxvt_img *img = this->tint (c);
945
946 if (factor > 1)
947 {
948 c.a = 0xffff;
949 c.r =
950 c.g =
951 c.b = 0xffff * (factor - 1);
952
953 img->brightness (c.r, c.g, c.b, c.a);
954 }
549 955
550 return img; 956 return img;
551} 957}
552 958
553rxvt_img * 959rxvt_img *
554rxvt_img::blend (rxvt_img *img, double factor) 960rxvt_img::filter (const char *name, int nparams, nv *params)
555{ 961{
556 rxvt_img *img2 = clone (); 962 composer cc (this);
557 Display *dpy = s->display->dpy;
558 Picture src = img->src_picture ();
559 Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
560 Picture mask = create_xrender_mask (dpy, img->pm, False);
561 963
562 XRenderColor mask_c; 964 XFixed *xparams = rxvt_temp_buf<XFixed> (nparams);
563 965
564 mask_c.alpha = float_to_component (factor); 966 for (int i = 0; i < nparams; ++i)
565 mask_c.red = 967 xparams [i] = XDoubleToFixed (params [i]);
566 mask_c.green =
567 mask_c.blue = 0;
568 XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
569 968
969 XRenderSetPictureFilter (cc.dpy, cc.src, name, xparams, nparams);
970
570 XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h); 971 XRenderComposite (cc.dpy, PictOpSrc, cc.src, 0, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
571 972
572 XRenderFreePicture (dpy, src);
573 XRenderFreePicture (dpy, dst);
574 XRenderFreePicture (dpy, mask);
575
576 return img2; 973 return cc;
577} 974}
578 975
579#endif 976#endif
580 977

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