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Comparing rxvt-unicode/src/rxvtimg.C (file contents):
Revision 1.58 by root, Thu Jun 7 20:35:35 2012 UTC vs.
Revision 1.112 by root, Tue Sep 17 18:31:32 2019 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
61rxvt_img * 306rxvt_img *
62rxvt_img::new_from_pixbuf (rxvt_screen *s, GdkPixbuf *pb) 307rxvt_img::new_from_pixbuf (rxvt_screen *s, GdkPixbuf *pb)
63{ 308{
64 Display *dpy = s->display->dpy; 309 Display *dpy = s->dpy;
65 310
66 int width = gdk_pixbuf_get_width (pb); 311 int width = gdk_pixbuf_get_width (pb);
67 int height = gdk_pixbuf_get_height (pb); 312 int height = gdk_pixbuf_get_height (pb);
68 313
69 if (width > 32767 || height > 32767) // well, we *could* upload in chunks 314 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"); 315 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
71 316
72 // since we require rgb24/argb32 formats from xrender we assume 317 // 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 318 // 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;
75 319
76 int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst; 320 int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
77 321
78 XImage xi; 322 XImage xi;
79 323
… …
83 xi.format = ZPixmap; 327 xi.format = ZPixmap;
84 xi.byte_order = ImageByteOrder (dpy); 328 xi.byte_order = ImageByteOrder (dpy);
85 xi.bitmap_unit = 0; //XY only, unused 329 xi.bitmap_unit = 0; //XY only, unused
86 xi.bitmap_bit_order = 0; //XY only, unused 330 xi.bitmap_bit_order = 0; //XY only, unused
87 xi.bitmap_pad = BitmapPad (dpy); 331 xi.bitmap_pad = BitmapPad (dpy);
88 xi.depth = depth; 332 xi.depth = 32;
89 xi.bytes_per_line = 0; 333 xi.bytes_per_line = 0;
90 xi.bits_per_pixel = 32; //Z only 334 xi.bits_per_pixel = 32; //Z only
91 xi.red_mask = 0x00000000; //Z only, unused 335 xi.red_mask = 0x00000000; //Z only, unused
92 xi.green_mask = 0x00000000; //Z only, unused 336 xi.green_mask = 0x00000000; //Z only, unused
93 xi.blue_mask = 0x00000000; //Z only, unused 337 xi.blue_mask = 0x00000000; //Z only, unused
… …
102 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n"); 346 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
103 347
104 xi.data = (char *)rxvt_malloc (height * xi.bytes_per_line); 348 xi.data = (char *)rxvt_malloc (height * xi.bytes_per_line);
105 349
106 int rowstride = gdk_pixbuf_get_rowstride (pb); 350 int rowstride = gdk_pixbuf_get_rowstride (pb);
107 351 bool pb_has_alpha = gdk_pixbuf_get_has_alpha (pb);
108 assert (3 + (depth == 32) == gdk_pixbuf_get_n_channels (pb));
109 unsigned char *row = gdk_pixbuf_get_pixels (pb); 352 unsigned char *row = gdk_pixbuf_get_pixels (pb);
353
110 char *line = xi.data; 354 char *line = xi.data;
111 355
112 for (int y = 0; y < height; y++) 356 for (int y = 0; y < height; y++)
113 { 357 {
114 unsigned char *src = row; 358 unsigned char *src = row;
115 uint32_t *dst = (uint32_t *)line; 359 uint32_t *dst = (uint32_t *)line;
116 360
117 if (depth == 24)
118 for (int x = 0; x < width; x++) 361 for (int x = 0; x < width; x++)
119 { 362 {
120 uint8_t r = *src++; 363 uint8_t r = *src++;
121 uint8_t g = *src++; 364 uint8_t g = *src++;
122 uint8_t b = *src++; 365 uint8_t b = *src++;
366 uint8_t a = *src;
123 367
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
124 uint32_t v = (r << 16) | (g << 8) | b; 376 uint32_t v = (a << 24) | (r << 16) | (g << 8) | b;
125 377
126 if (ecb_big_endian () ? !byte_order_mismatch : byte_order_mismatch) 378 if (ecb_big_endian () ? !byte_order_mismatch : byte_order_mismatch)
127 v = ecb_bswap32 (v); 379 v = ecb_bswap32 (v);
128 380
129 *dst++ = v; 381 *dst++ = v;
130 } 382 }
131 else
132 for (int x = 0; x < width; x++)
133 {
134 uint32_t v = *(uint32_t *)src; src += 4;
135
136 if (ecb_big_endian ())
137 v = ecb_bswap32 (v);
138
139 v = ecb_rotl32 (v, 8); // abgr to bgra
140
141 if (!byte_order_mismatch)
142 v = ecb_bswap32 (v);
143
144 *dst++ = v;
145 }
146 383
147 row += rowstride; 384 row += rowstride;
148 line += xi.bytes_per_line; 385 line += xi.bytes_per_line;
149 } 386 }
150 387
151 rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, depth == 24 ? PictStandardRGB24 : PictStandardARGB32), 0, 0, width, height); 388 rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, PictStandardARGB32), 0, 0, width, height);
152 img->alloc (); 389 img->alloc ();
153 390
154 GC gc = XCreateGC (dpy, img->pm, 0, 0); 391 GC gc = XCreateGC (dpy, img->pm, 0, 0);
155 XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height); 392 XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
156 XFreeGC (dpy, gc); 393 XFreeGC (dpy, gc);
… …
165{ 402{
166 GError *err = 0; 403 GError *err = 0;
167 GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err); 404 GdkPixbuf *pb = gdk_pixbuf_new_from_file (filename, &err);
168 405
169 if (!pb) 406 if (!pb)
407 try
408 {
170 rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message); 409 rxvt_fatal ("rxvt_img::new_from_file: %s\n", err->message);
410 }
411 catch (...)
412 {
413 g_error_free (err);
414 throw;
415 }
171 416
172 rxvt_img *img = new_from_pixbuf (s, pb); 417 rxvt_img *img = new_from_pixbuf (s, pb);
173 418
174 g_object_unref (pb); 419 g_object_unref (pb);
175 420
176 return img; 421 return img;
177} 422}
423
424# endif
178 425
179void 426void
180rxvt_img::destroy () 427rxvt_img::destroy ()
181{ 428{
182 if (--ref->cnt) 429 if (--ref->cnt)
183 return; 430 return;
184 431
185 if (pm && ref->ours) 432 if (pm && ref->ours)
186 XFreePixmap (s->display->dpy, pm); 433 XFreePixmap (d->dpy, pm);
187 434
188 delete ref; 435 delete ref;
189} 436}
190 437
191rxvt_img::~rxvt_img () 438rxvt_img::~rxvt_img ()
… …
194} 441}
195 442
196void 443void
197rxvt_img::alloc () 444rxvt_img::alloc ()
198{ 445{
199 pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth); 446 pm = XCreatePixmap (d->dpy, d->root, w, h, format->depth);
200 ref = new pixref (w, h); 447 ref = new pixref (w, h);
201} 448}
202 449
450rxvt_img *
451rxvt_img::new_empty ()
452{
453 rxvt_img *img = new rxvt_img (d, format, x, y, w, h, repeat);
454 img->alloc ();
455
456 return img;
457}
458
203Picture 459Picture
204rxvt_img::src_picture () 460rxvt_img::picture ()
205{ 461{
206 Display *dpy = s->display->dpy; 462 Display *dpy = d->dpy;
207 463
208 XRenderPictureAttributes pa; 464 XRenderPictureAttributes pa;
209 pa.repeat = repeat; 465 pa.repeat = repeat;
210 Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa); 466 Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
211 467
… …
216rxvt_img::unshare () 472rxvt_img::unshare ()
217{ 473{
218 if (ref->cnt == 1 && ref->ours) 474 if (ref->cnt == 1 && ref->ours)
219 return; 475 return;
220 476
221 //TODO: maybe should reify instead
222 Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth); 477 Pixmap pm2 = XCreatePixmap (d->dpy, d->root, ref->w, ref->h, format->depth);
223 GC gc = XCreateGC (s->display->dpy, pm, 0, 0); 478 GC gc = XCreateGC (d->dpy, pm, 0, 0);
224 XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0); 479 XCopyArea (d->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
225 XFreeGC (s->display->dpy, gc); 480 XFreeGC (d->dpy, gc);
226 481
227 destroy (); 482 destroy ();
228 483
229 pm = pm2; 484 pm = pm2;
230 ref = new pixref (ref->w, ref->h); 485 ref = new pixref (ref->w, ref->h);
231} 486}
232 487
233void 488void
489rxvt_img::fill (const rgba &c, int x, int y, int w, int h)
490{
491 XRenderColor rc = { c.r, c.g, c.b, c.a };
492
493 Display *dpy = d->dpy;
494 Picture src = picture ();
495 XRenderFillRectangle (dpy, PictOpSrc, src, &rc, x, y, w, h);
496 XRenderFreePicture (dpy, src);
497}
498
499void
234rxvt_img::fill (const rxvt_color &c) 500rxvt_img::fill (const rgba &c)
235{ 501{
236 XGCValues gcv; 502 fill (c, 0, 0, w, h);
237 gcv.foreground = c; 503}
238 GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv); 504
239 XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h); 505void
240 XFreeGC (s->display->dpy, gc); 506rxvt_img::add_alpha ()
507{
508 if (format->direct.alphaMask)
509 return;
510
511 composer cc (this, new rxvt_img (d, find_alpha_format_for (d->dpy, format), x, y, w, h, repeat));
512
513 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
514
515 rxvt_img *img = cc;
516
517 ::swap (img->ref, ref);
518 ::swap (img->pm , pm );
519
520 delete img;
241} 521}
242 522
243static void 523static void
244get_gaussian_kernel (int radius, int width, double *kernel, XFixed *params) 524get_gaussian_kernel (int radius, int width, nv *kernel, XFixed *params)
245{ 525{
246 double sigma = radius / 2.0; 526 nv sigma = radius / 2.0;
247 double scale = sqrt (2.0 * M_PI) * sigma; 527 nv scale = sqrt (2.0 * M_PI) * sigma;
248 double sum = 0.0; 528 nv sum = 0.0;
249 529
250 for (int i = 0; i < width; i++) 530 for (int i = 0; i < width; i++)
251 { 531 {
252 double x = i - width / 2; 532 nv x = i - width / 2;
253 kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale; 533 kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
254 sum += kernel[i]; 534 sum += kernel[i];
255 } 535 }
256 536
257 params[0] = XDoubleToFixed (width); 537 params[0] = XDoubleToFixed (width);
… …
262} 542}
263 543
264rxvt_img * 544rxvt_img *
265rxvt_img::blur (int rh, int rv) 545rxvt_img::blur (int rh, int rv)
266{ 546{
267 if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV)) 547 if (!(d->flags & DISPLAY_HAS_RENDER_CONV))
268 return clone (); 548 return clone ();
269 549
270 Display *dpy = s->display->dpy; 550 Display *dpy = d->dpy;
271 int size = max (rh, rv) * 2 + 1; 551 int size = max (rh, rv) * 2 + 1;
272 double *kernel = (double *)malloc (size * sizeof (double)); 552 nv *kernel = (nv *)malloc (size * sizeof (nv));
273 XFixed *params = (XFixed *)malloc ((size + 2) * sizeof (XFixed)); 553 XFixed *params = rxvt_temp_buf<XFixed> (size + 2);
274 rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat); 554 rxvt_img *img = new_empty ();
275 img->alloc ();
276
277 Picture src = src_picture ();
278 555
279 XRenderPictureAttributes pa; 556 XRenderPictureAttributes pa;
280 pa.repeat = RepeatPad; 557 pa.repeat = RepeatPad;
281 Picture dst = XRenderCreatePicture (dpy, img->pm, format, CPRepeat, &pa); 558 Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
559 Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
282 560
283 Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth); 561 Pixmap tmp_pm = XCreatePixmap (dpy, pm, w, h, format->depth);
284 Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa); 562 Picture tmp = XRenderCreatePicture (dpy, tmp_pm , format, CPRepeat, &pa);
285 XFreePixmap (dpy, tmp_pm); 563 XFreePixmap (dpy, tmp_pm);
286 564
… …
302 580
303 size = rv * 2 + 1; 581 size = rv * 2 + 1;
304 get_gaussian_kernel (rv, size, kernel, params); 582 get_gaussian_kernel (rv, size, kernel, params);
305 ::swap (params[0], params[1]); 583 ::swap (params[0], params[1]);
306 584
307 XRenderSetPictureFilter (dpy, src, FilterConvolution, params, size+2); 585 XRenderSetPictureFilter (dpy, tmp, FilterConvolution, params, size+2);
308 XRenderComposite (dpy, 586 XRenderComposite (dpy,
309 PictOpSrc, 587 PictOpSrc,
310 tmp, 588 tmp,
311 None, 589 None,
312 dst, 590 dst,
… …
315 0, 0, 593 0, 0,
316 w, h); 594 w, h);
317 } 595 }
318 596
319 free (kernel); 597 free (kernel);
320 free (params); 598
321 XRenderFreePicture (dpy, src); 599 XRenderFreePicture (dpy, src);
322 XRenderFreePicture (dpy, dst); 600 XRenderFreePicture (dpy, dst);
323 XRenderFreePicture (dpy, tmp); 601 XRenderFreePicture (dpy, tmp);
324 602
325 return img; 603 return img;
326} 604}
327 605
328static Picture 606rxvt_img *
329create_xrender_mask (Display *dpy, Drawable drawable, Bool argb) 607rxvt_img::muladd (nv mul, nv add)
330{ 608{
331 Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8); 609 // STEP 1: double the image width, fill all odd columns with white (==1)
332 610
333 XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8); 611 composer cc (this, new rxvt_img (d, format, 0, 0, w * 2, h, repeat));
334 XRenderPictureAttributes pa;
335 pa.repeat = True;
336 Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat, &pa);
337 612
338 XFreePixmap (dpy, pixmap); 613 // why the hell does XRenderSetPictureTransform want a writable matrix :(
614 // that keeps us from just static const'ing this matrix.
615 XTransform h_double = {
616 0x08000, 0, 0,
617 0, 0x10000, 0,
618 0, 0, 0x10000
619 };
339 620
340 return mask; 621 XRenderSetPictureFilter (cc.dpy, cc.src, "nearest", 0, 0);
622 XRenderSetPictureTransform (cc.dpy, cc.src, &h_double);
623 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
624
625 cc.mask (false, 2, 1);
626
627 static const XRenderColor c0 = { 0, 0, 0, 0 };
628 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &c0, 0, 0, 1, 1);
629 static const XRenderColor c1 = { 65535, 65535, 65535, 65535 };
630 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &c1, 1, 0, 1, 1);
631
632 Picture white = XRenderCreateSolidFill (cc.dpy, &c1);
633
634 XRenderComposite (cc.dpy, PictOpOver, white, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
635
636 XRenderFreePicture (cc.dpy, white);
637
638 // STEP 2: convolve the image with a 3x1 filter
639 // a 2x1 filter would obviously suffice, but given the total lack of specification
640 // for xrender, I expect different xrender implementations to randomly diverge.
641 // we also halve the image, and hope for the best (again, for lack of specs).
642 composer cc2 (cc.dstimg);
643
644 XFixed kernel [] = {
645 XDoubleToFixed (3), XDoubleToFixed (1),
646 XDoubleToFixed (0), XDoubleToFixed (mul), XDoubleToFixed (add)
647 };
648
649 XTransform h_halve = {
650 0x20000, 0, 0,
651 0, 0x10000, 0,
652 0, 0, 0x10000
653 };
654
655 XRenderSetPictureFilter (cc.dpy, cc2.src, "nearest", 0, 0);
656 XRenderSetPictureTransform (cc.dpy, cc2.src, &h_halve);
657 XRenderSetPictureFilter (cc.dpy, cc2.src, FilterConvolution, kernel, ecb_array_length (kernel));
658
659 XRenderComposite (cc.dpy, PictOpSrc, cc2.src, None, cc2.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
660
661 return cc2;
662}
663
664ecb_noinline static void
665extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc)
666{
667 int32_t x = clamp (c, cl0, cl1);
668 c -= x;
669 xc = x;
670}
671
672ecb_noinline static bool
673extract (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)
674{
675 extract (cl0, cl1, r, xr);
676 extract (cl0, cl1, g, xg);
677 extract (cl0, cl1, b, xb);
678 extract (cl0, cl1, a, xa);
679
680 return xr | xg | xb | xa;
341} 681}
342 682
343void 683void
344rxvt_img::brightness (unsigned short r, unsigned short g, unsigned short b, unsigned short a) 684rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a)
345{ 685{
686 unshare ();
687
346 Display *dpy = s->display->dpy; 688 Display *dpy = d->dpy;
347 Picture src = create_xrender_mask (dpy, pm, True);
348 Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); 689 Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
349 690
691 // loop should not be needed for brightness, as only -1..1 makes sense
692 //while (r | g | b | a)
693 {
694 unsigned short xr, xg, xb, xa;
350 XRenderColor mask_c; 695 XRenderColor mask_c;
351 mask_c.red = r; 696
352 mask_c.green = g; 697 if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
353 mask_c.blue = b;
354 mask_c.alpha = a;
355 XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1); 698 XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
356 699
357 XRenderComposite (dpy, PictOpAdd, src, None, dst, 0, 0, 0, 0, 0, 0, w, h); 700 if (extract (-65535, 0, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
701 {
702 XRenderColor mask_w = { 65535, 65535, 65535, 65535 };
703 XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
704 mask_c.red = -mask_c.red; //TODO: verify that doing clamp, assign, and negation does the right thing
705 mask_c.green = -mask_c.green;
706 mask_c.blue = -mask_c.blue;
707 mask_c.alpha = -mask_c.alpha;
708 XRenderFillRectangle (dpy, PictOpAdd, dst, &mask_c, 0, 0, w, h);
709 XRenderFillRectangle (dpy, PictOpDifference, dst, &mask_w, 0, 0, w, h);
710 }
711 }
358 712
359 XRenderFreePicture (dpy, src);
360 XRenderFreePicture (dpy, dst); 713 XRenderFreePicture (dpy, dst);
361} 714}
362 715
363void 716void
364rxvt_img::contrast (unsigned short r, unsigned short g, unsigned short b, unsigned short a) 717rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a)
365{ 718{
366 if (!(s->display->flags & DISPLAY_HAS_RENDER_MUL)) 719 if (r < 0 || g < 0 || b < 0 || a < 0)
367 return; 720 rxvt_fatal ("rxvt_img::contrast does not support negative values.\n");
368 721
369 Display *dpy = s->display->dpy; 722 // premultiply (yeah, these are not exact, sue me or fix it)
370 Picture src = create_xrender_mask (dpy, pm, True); 723 r = (r * (a >> 8)) >> 8;
371 Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); 724 g = (g * (a >> 8)) >> 8;
725 b = (b * (a >> 8)) >> 8;
372 726
727 composer cc (this);
728 rxvt_img *img = cc;
729 img->fill (rgba (0, 0, 0, 0));
730
731 cc.mask (true);
732
733 //TODO: this operator does not yet implement some useful contrast
734 while (r | g | b | a)
735 {
736 unsigned short xr, xg, xb, xa;
373 XRenderColor mask_c; 737 XRenderColor mask_c;
374 mask_c.red = r; 738
375 mask_c.green = g; 739 if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
376 mask_c.blue = b; 740 {
377 mask_c.alpha = a;
378 XRenderFillRectangle (dpy, PictOpSrc, src, &mask_c, 0, 0, 1, 1); 741 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &mask_c, 0, 0, 1, 1);
379
380 XRenderComposite (dpy, PictOpMultiply, src, None, dst, 0, 0, 0, 0, 0, 0, w, h); 742 XRenderComposite (cc.dpy, PictOpAdd, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
743 }
744 }
381 745
382 XRenderFreePicture (dpy, src); 746 ::swap (img->ref, ref);
383 XRenderFreePicture (dpy, dst); 747 ::swap (img->pm , pm );
748
749 delete img;
750}
751
752void
753rxvt_img::draw (rxvt_img *img, int op, nv mask)
754{
755 unshare ();
756
757 composer cc (img, this);
758
759 if (mask != 1.)
760 cc.mask (rgba (0, 0, 0, float_to_component (mask)));
761
762 XRenderComposite (cc.dpy, op, cc.src, cc.msk, cc.dst, x - img->x, y - img->y, 0, 0, 0, 0, w, h);
384} 763}
385 764
386rxvt_img * 765rxvt_img *
387rxvt_img::clone () 766rxvt_img::clone ()
388{ 767{
389 return new rxvt_img (*this); 768 return new rxvt_img (*this);
390}
391
392static XRenderPictFormat *
393find_alpha_format_for (Display *dpy, XRenderPictFormat *format)
394{
395 if (format->direct.alphaMask)
396 return format; // already has alpha
397
398 // try to find a suitable alpha format, one bit alpha is enough for our purposes
399 if (format->type == PictTypeDirect)
400 for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
401 if (f->direct.alphaMask
402 && f->type == PictTypeDirect
403 && ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
404 && ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
405 && ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
406 return f;
407
408 // should be a very good fallback
409 return XRenderFindStandardFormat (dpy, PictStandardARGB32);
410} 769}
411 770
412rxvt_img * 771rxvt_img *
413rxvt_img::reify () 772rxvt_img::reify ()
414{ 773{
415 if (x == 0 && y == 0 && w == ref->w && h == ref->h) 774 if (x == 0 && y == 0 && w == ref->w && h == ref->h)
416 return clone (); 775 return clone ();
417 776
418 Display *dpy = s->display->dpy; 777 // add an alpha channel if...
419
420 bool alpha = !format->direct.alphaMask 778 bool alpha = !format->direct.alphaMask // pixmap has none yet
421 && (x || y) 779 && (x || y) // we need one because of non-zero offset
422 && repeat == RepeatNone; 780 && repeat == RepeatNone; // and we have no good pixels to fill with
423 781
424 rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat); 782 composer cc (this, new rxvt_img (d, alpha ? find_alpha_format_for (d->dpy, format) : format,
425 img->alloc (); 783 0, 0, w, h, repeat));
426 784
427 Picture src = src_picture (); 785 if (repeat == RepeatNone)
428 Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
429
430 if (alpha)
431 { 786 {
432 XRenderColor rc = { 0, 0, 0, 0 }; 787 XRenderColor rc = { 0, 0, 0, 0 };
433 XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles 788 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
434 XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h); 789 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, x, y, ref->w, ref->h);
435 } 790 }
436 else 791 else
437 XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h); 792 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, -x, -y, 0, 0, 0, 0, w, h);
438 793
439 XRenderFreePicture (dpy, src);
440 XRenderFreePicture (dpy, dst);
441
442 return img; 794 return cc;
443} 795}
444 796
445rxvt_img * 797rxvt_img *
446rxvt_img::sub_rect (int x, int y, int width, int height) 798rxvt_img::sub_rect (int x, int y, int width, int height)
447{ 799{
448 rxvt_img *img = clone (); 800 rxvt_img *img = clone ();
449 801
450 img->x += x; 802 img->x -= x;
451 img->y += y; 803 img->y -= y;
452 804
453 if (w != width || h != height) 805 if (w != width || h != height)
454 { 806 {
455 img->w = width; 807 img->w = width;
456 img->h = height; 808 img->h = height;
… …
462 814
463 return img; 815 return img;
464} 816}
465 817
466rxvt_img * 818rxvt_img *
467rxvt_img::transform (int new_width, int new_height, double matrix[9]) 819rxvt_img::transform (const nv matrix[3][3])
468{ 820{
469 rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat); 821 return transform (mat3x3 (&matrix[0][0]));
470 img->alloc (); 822}
471 823
472 Display *dpy = s->display->dpy; 824rxvt_img *
473 Picture src = src_picture (); 825rxvt_img::transform (const nv *matrix)
474 Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0); 826{
827 mat3x3 m (matrix);
828
829 // calculate new pixel bounding box coordinates
830 nv rmin[2], rmax[2];
831
832 for (int i = 0; i < 2; ++i)
833 {
834 nv v;
835
836 v = m.apply1 (i, 0+x, 0+y); rmin [i] = rmax [i] = v;
837 v = m.apply1 (i, w+x, 0+y); min_it (rmin [i], v); max_it (rmax [i], v);
838 v = m.apply1 (i, 0+x, h+y); min_it (rmin [i], v); max_it (rmax [i], v);
839 v = m.apply1 (i, w+x, h+y); min_it (rmin [i], v); max_it (rmax [i], v);
840 }
841
842 float sx = rmin [0] - x;
843 float sy = rmin [1] - y;
844
845 // TODO: adjust matrix for subpixel accuracy
846 int nx = floor (rmin [0]);
847 int ny = floor (rmin [1]);
848
849 int new_width = ceil (rmax [0] - rmin [0]);
850 int new_height = ceil (rmax [1] - rmin [1]);
851
852 mat3x3 inv = (mat3x3::translate (-x, -y) * m * mat3x3::translate (x, y)).inverse ();
853
854 composer cc (this, new rxvt_img (d, format, nx, ny, new_width, new_height, repeat));
475 855
476 XTransform xfrm; 856 XTransform xfrm;
477 857
478 for (int i = 0; i < 3; ++i) 858 for (int i = 0; i < 3; ++i)
479 for (int j = 0; j < 3; ++j) 859 for (int j = 0; j < 3; ++j)
480 xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]); 860 xfrm.matrix [i][j] = XDoubleToFixed (inv [i][j]);
481 861
482#if 0
483 xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
484 xfrm.matrix [1][2] -= XDoubleToFixed (y);
485#endif
486
487 XRenderSetPictureFilter (dpy, src, "good", 0, 0); 862 XRenderSetPictureFilter (cc.dpy, cc.src, "good", 0, 0);
488 XRenderSetPictureTransform (dpy, src, &xfrm); 863 XRenderSetPictureTransform (cc.dpy, cc.src, &xfrm);
489 XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height); 864 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, sx, sy, 0, 0, 0, 0, new_width, new_height);
490 865
491 XRenderFreePicture (dpy, src);
492 XRenderFreePicture (dpy, dst);
493
494 return img; 866 return cc;
495} 867}
496 868
497rxvt_img * 869rxvt_img *
498rxvt_img::scale (int new_width, int new_height) 870rxvt_img::scale (int new_width, int new_height)
499{ 871{
500 if (w == new_width && h == new_height) 872 if (w == new_width && h == new_height)
501 return clone (); 873 return clone ();
502 874
503 double matrix[9] = {
504 w / (double)new_width, 0, 0,
505 0, h / (double)new_height, 0,
506 0, 0, 1
507 };
508
509 int old_repeat_mode = repeat; 875 int old_repeat_mode = repeat;
510 repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems 876 repeat = RepeatPad; // not right, but xrender can't properly scale it seems
511 877
512 rxvt_img *img = transform (new_width, new_height, matrix); 878 rxvt_img *img = transform (mat3x3::scale (new_width / (nv)w, new_height / (nv)h));
513 879
514 repeat = old_repeat_mode; 880 repeat = old_repeat_mode;
515 img->repeat = repeat; 881 img->repeat = repeat;
516 882
517 return img; 883 return img;
518} 884}
519 885
520rxvt_img * 886rxvt_img *
521rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi) 887rxvt_img::rotate (int cx, int cy, nv phi)
522{ 888{
523 double s = sin (phi); 889 move (-cx, -cy);
524 double c = cos (phi); 890 rxvt_img *img = transform (mat3x3::rotate (phi));
891 move ( cx, cy);
892 img->move (cx, cy);
525 893
526 double matrix[9] = { 894 return img;
527 c, -s, -c * x + s * y + x,
528 s, c, -s * x - c * y + y,
529 0, 0, 1
530 };
531
532 return transform (new_width, new_height, matrix);
533} 895}
534 896
535rxvt_img * 897rxvt_img *
536rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg) 898rxvt_img::convert_format (XRenderPictFormat *new_format, const rgba &bg)
537{ 899{
538 if (new_format == format) 900 if (new_format == format)
539 return clone (); 901 return clone ();
540 902
541 rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat); 903 composer cc (this, new rxvt_img (d, new_format, x, y, w, h, repeat));
542 img->alloc ();
543 904
544 Display *dpy = s->display->dpy;
545 Picture src = src_picture ();
546 Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
547 int op = PictOpSrc; 905 int op = PictOpSrc;
548 906
549 if (format->direct.alphaMask && !new_format->direct.alphaMask) 907 if (format->direct.alphaMask && !new_format->direct.alphaMask)
550 { 908 {
551 // does it have to be that complicated 909 // does it have to be that complicated
552 rgba c;
553 bg.get (c);
554
555 XRenderColor rc = { c.r, c.g, c.b, 0xffff }; 910 XRenderColor rc = { bg.r, bg.g, bg.b, bg.a };
556 XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h); 911 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);
557 912
558 op = PictOpOver; 913 op = PictOpOver;
559 } 914 }
560 915
561 XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h); 916 XRenderComposite (cc.dpy, op, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
562 917
563 XRenderFreePicture (dpy, src); 918 return cc;
564 XRenderFreePicture (dpy, dst); 919}
920
921rxvt_img *
922rxvt_img::tint (const rgba &c)
923{
924 composer cc (this);
925 cc.mask (true);
926 cc.fill (c);
927
928 XRenderComposite (cc.dpy, PictOpSrc, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
929
930 return cc;
931}
932
933rxvt_img *
934rxvt_img::shade (nv factor, rgba c)
935{
936 clamp_it (factor, -1., 1.);
937 factor++;
938
939 if (factor > 1)
940 {
941 c.r = c.r * (2 - factor);
942 c.g = c.g * (2 - factor);
943 c.b = c.b * (2 - factor);
944 }
945 else
946 {
947 c.r = c.r * factor;
948 c.g = c.g * factor;
949 c.b = c.b * factor;
950 }
951
952 rxvt_img *img = this->tint (c);
953
954 if (factor > 1)
955 {
956 c.a = 0xffff;
957 c.r =
958 c.g =
959 c.b = 0xffff * (factor - 1);
960
961 img->brightness (c.r, c.g, c.b, c.a);
962 }
565 963
566 return img; 964 return img;
567} 965}
568 966
569rxvt_img * 967rxvt_img *
570rxvt_img::blend (rxvt_img *img, double factor) 968rxvt_img::filter (const char *name, int nparams, nv *params)
571{ 969{
572 rxvt_img *img2 = clone (); 970 composer cc (this);
573 Display *dpy = s->display->dpy;
574 Picture src = img->src_picture ();
575 Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
576 Picture mask = create_xrender_mask (dpy, img->pm, False);
577 971
578 XRenderColor mask_c; 972 XFixed *xparams = rxvt_temp_buf<XFixed> (nparams);
579 973
580 mask_c.alpha = float_to_component (factor); 974 for (int i = 0; i < nparams; ++i)
581 mask_c.red = 975 xparams [i] = XDoubleToFixed (params [i]);
582 mask_c.green =
583 mask_c.blue = 0;
584 XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
585 976
977 XRenderSetPictureFilter (cc.dpy, cc.src, name, xparams, nparams);
978
586 XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h); 979 XRenderComposite (cc.dpy, PictOpSrc, cc.src, 0, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
587 980
588 XRenderFreePicture (dpy, src);
589 XRenderFreePicture (dpy, dst);
590 XRenderFreePicture (dpy, mask);
591
592 return img2; 981 return cc;
593} 982}
594 983
595#endif 984#endif
596 985

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