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Comparing rxvt-unicode/src/rxvtimg.C (file contents):
Revision 1.75 by sf-exg, Sun Jun 10 07:51:45 2012 UTC vs.
Revision 1.105 by sf-exg, Sat Jan 19 10:04:34 2013 UTC

1/*----------------------------------------------------------------------*
2 * File: rxvtimg.C
3 *----------------------------------------------------------------------*
4 *
5 * All portions of code are copyright by their respective author/s.
6 * Copyright (c) 2012 Marc Lehmann <schmorp@schmorp.de>
7 * Copyright (c) 2012 Emanuele Giaquinta <e.giaquinta@glauco.it>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *---------------------------------------------------------------------*/
23
24#include <string.h>
1#include <math.h> 25#include <math.h>
2#include "../config.h" 26#include "../config.h"
3#include "rxvt.h" 27#include "rxvt.h"
4 28
5#if HAVE_IMG 29#if HAVE_IMG
6 30
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->s->dpy;
170 src = srcimg->picture ();
171 dst = this->dstimg->picture ();
172 }
173
174 ecb_noinline
175 void mask (bool rgb = true, int w = 1, int h = 1)
176 {
177 Pixmap pixmap = XCreatePixmap (dpy, srcimg->pm, w, h, rgb ? 32 : 8);
178
179 XRenderPictFormat *format = XRenderFindStandardFormat (dpy, rgb ? PictStandardARGB32 : PictStandardA8);
180 XRenderPictureAttributes pa;
181 pa.repeat = RepeatNormal;
182 pa.component_alpha = rgb;
183 msk = XRenderCreatePicture (dpy, pixmap, format, CPRepeat | CPComponentAlpha, &pa);
184
185 XFreePixmap (dpy, pixmap);
186
187 ecb_assume (msk);
188 }
189
190 // CreateSolidFill creates a very very very weird picture
191 void mask (const rgba &c)
192 {
193 XRenderColor rc = {
194 c.r * c.a / 65535,
195 c.g * c.a / 65535,
196 c.b * c.a / 65535,
197 c.a
198 };
199 msk = XRenderCreateSolidFill (dpy, &rc);
200 ecb_assume (msk);
201 }
202
203 void fill (const rgba &c)
204 {
205 XRenderColor rc = {
206 c.r * c.a / 65535,
207 c.g * c.a / 65535,
208 c.b * c.a / 65535,
209 c.a
210 };
211
212 XRenderFillRectangle (dpy, PictOpSrc, msk, &rc, 0, 0, 1, 1);
213 }
214
215 operator rxvt_img *()
216 {
217 return dstimg;
218 }
219
220 ecb_noinline
221 ~composer ()
222 {
223 XRenderFreePicture (dpy, src);
224 XRenderFreePicture (dpy, dst);
225 if (msk) XRenderFreePicture (dpy, msk);
226 }
227 };
228}
229
230static XRenderPictFormat *
231find_alpha_format_for (Display *dpy, XRenderPictFormat *format)
232{
233 if (format->direct.alphaMask)
234 return format; // already has alpha
235
236 // try to find a suitable alpha format, one bit alpha is enough for our purposes
237 if (format->type == PictTypeDirect)
238 for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
239 if (f->direct.alphaMask
240 && f->type == PictTypeDirect
241 && ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
242 && ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
243 && ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
244 return f;
245
246 // should be a very good fallback
247 return XRenderFindStandardFormat (dpy, PictStandardARGB32);
248}
249
7rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height, int repeat) 250rxvt_img::rxvt_img (rxvt_screen *screen, XRenderPictFormat *format, int x, int y, int width, int height, int repeat)
8: s(screen), x(x), y(y), w(width), h(height), format(format), repeat(repeat), 251: s(screen), x(x), y(y), w(width), h(height), format(format), repeat(repeat),
9 pm(0), ref(0) 252 pm(0), ref(0)
10{ 253{
11} 254}
… …
17} 260}
18 261
19rxvt_img * 262rxvt_img *
20rxvt_img::new_from_root (rxvt_screen *s) 263rxvt_img::new_from_root (rxvt_screen *s)
21{ 264{
22 Display *dpy = s->display->dpy; 265 Display *dpy = s->dpy;
23 unsigned int root_pm_w, root_pm_h; 266 unsigned int root_pm_w, root_pm_h;
24 Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_XROOTPMAP_ID]); 267 Pixmap root_pixmap = s->display->get_pixmap_property (s->display->xa [XA_XROOTPMAP_ID]);
25 if (root_pixmap == None) 268 if (root_pixmap == None)
26 root_pixmap = s->display->get_pixmap_property (s->display->xa[XA_ESETROOT_PMAP_ID]); 269 root_pixmap = s->display->get_pixmap_property (s->display->xa [XA_ESETROOT_PMAP_ID]);
27 270
28 if (root_pixmap == None) 271 if (root_pixmap == None)
29 return 0; 272 return 0;
30 273
31 Window wdummy; 274 Window wdummy;
… …
50 293
51 return img; 294 return img;
52} 295}
53 296
54# if HAVE_PIXBUF 297# if HAVE_PIXBUF
298
55rxvt_img * 299rxvt_img *
56rxvt_img::new_from_pixbuf (rxvt_screen *s, GdkPixbuf *pb) 300rxvt_img::new_from_pixbuf (rxvt_screen *s, GdkPixbuf *pb)
57{ 301{
58 Display *dpy = s->display->dpy; 302 Display *dpy = s->dpy;
59 303
60 int width = gdk_pixbuf_get_width (pb); 304 int width = gdk_pixbuf_get_width (pb);
61 int height = gdk_pixbuf_get_height (pb); 305 int height = gdk_pixbuf_get_height (pb);
62 306
63 if (width > 32767 || height > 32767) // well, we *could* upload in chunks 307 if (width > 32767 || height > 32767) // well, we *could* upload in chunks
64 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n"); 308 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big (maximum size 32768x32768).\n");
65 309
66 // since we require rgb24/argb32 formats from xrender we assume 310 // since we require rgb24/argb32 formats from xrender we assume
67 // that both 24 and 32 bpp MUST be supported by any screen that supports xrender 311 // that both 24 and 32 bpp MUST be supported by any screen that supports xrender
68 int depth = gdk_pixbuf_get_has_alpha (pb) ? 32 : 24;
69 312
70 int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst; 313 int byte_order = ecb_big_endian () ? MSBFirst : LSBFirst;
71 314
72 XImage xi; 315 XImage xi;
73 316
… …
77 xi.format = ZPixmap; 320 xi.format = ZPixmap;
78 xi.byte_order = ImageByteOrder (dpy); 321 xi.byte_order = ImageByteOrder (dpy);
79 xi.bitmap_unit = 0; //XY only, unused 322 xi.bitmap_unit = 0; //XY only, unused
80 xi.bitmap_bit_order = 0; //XY only, unused 323 xi.bitmap_bit_order = 0; //XY only, unused
81 xi.bitmap_pad = BitmapPad (dpy); 324 xi.bitmap_pad = BitmapPad (dpy);
82 xi.depth = depth; 325 xi.depth = 32;
83 xi.bytes_per_line = 0; 326 xi.bytes_per_line = 0;
84 xi.bits_per_pixel = 32; //Z only 327 xi.bits_per_pixel = 32; //Z only
85 xi.red_mask = 0x00000000; //Z only, unused 328 xi.red_mask = 0x00000000; //Z only, unused
86 xi.green_mask = 0x00000000; //Z only, unused 329 xi.green_mask = 0x00000000; //Z only, unused
87 xi.blue_mask = 0x00000000; //Z only, unused 330 xi.blue_mask = 0x00000000; //Z only, unused
… …
96 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n"); 339 rxvt_fatal ("rxvt_img::new_from_pixbuf: image too big for Xlib.\n");
97 340
98 xi.data = (char *)rxvt_malloc (height * xi.bytes_per_line); 341 xi.data = (char *)rxvt_malloc (height * xi.bytes_per_line);
99 342
100 int rowstride = gdk_pixbuf_get_rowstride (pb); 343 int rowstride = gdk_pixbuf_get_rowstride (pb);
101 344 bool pb_has_alpha = gdk_pixbuf_get_has_alpha (pb);
102 assert (3 + (depth == 32) == gdk_pixbuf_get_n_channels (pb));
103 unsigned char *row = gdk_pixbuf_get_pixels (pb); 345 unsigned char *row = gdk_pixbuf_get_pixels (pb);
346
104 char *line = xi.data; 347 char *line = xi.data;
105 348
106 for (int y = 0; y < height; y++) 349 for (int y = 0; y < height; y++)
107 { 350 {
108 unsigned char *src = row; 351 unsigned char *src = row;
109 uint32_t *dst = (uint32_t *)line; 352 uint32_t *dst = (uint32_t *)line;
110 353
111 if (depth == 24)
112 for (int x = 0; x < width; x++) 354 for (int x = 0; x < width; x++)
113 { 355 {
114 uint8_t r = *src++; 356 uint8_t r = *src++;
115 uint8_t g = *src++; 357 uint8_t g = *src++;
116 uint8_t b = *src++; 358 uint8_t b = *src++;
359 uint8_t a = *src;
117 360
361 // this is done so it can be jump-free, but newer gcc's clone inner the loop
362 a = pb_has_alpha ? a : 255;
363 src += pb_has_alpha;
364
365 r = (r * a + 127) / 255;
366 g = (g * a + 127) / 255;
367 b = (b * a + 127) / 255;
368
118 uint32_t v = (r << 16) | (g << 8) | b; 369 uint32_t v = (a << 24) | (r << 16) | (g << 8) | b;
119 370
120 if (ecb_big_endian () ? !byte_order_mismatch : byte_order_mismatch) 371 if (ecb_big_endian () ? !byte_order_mismatch : byte_order_mismatch)
121 v = ecb_bswap32 (v); 372 v = ecb_bswap32 (v);
122 373
123 *dst++ = v; 374 *dst++ = v;
124 } 375 }
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 }
140 376
141 row += rowstride; 377 row += rowstride;
142 line += xi.bytes_per_line; 378 line += xi.bytes_per_line;
143 } 379 }
144 380
145 rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, depth == 24 ? PictStandardRGB24 : PictStandardARGB32), 0, 0, width, height); 381 rxvt_img *img = new rxvt_img (s, XRenderFindStandardFormat (dpy, PictStandardARGB32), 0, 0, width, height);
146 img->alloc (); 382 img->alloc ();
147 383
148 GC gc = XCreateGC (dpy, img->pm, 0, 0); 384 GC gc = XCreateGC (dpy, img->pm, 0, 0);
149 XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height); 385 XPutImage (dpy, img->pm, gc, &xi, 0, 0, 0, 0, width, height);
150 XFreeGC (dpy, gc); 386 XFreeGC (dpy, gc);
… …
167 403
168 g_object_unref (pb); 404 g_object_unref (pb);
169 405
170 return img; 406 return img;
171} 407}
408
172# endif 409# endif
173 410
174void 411void
175rxvt_img::destroy () 412rxvt_img::destroy ()
176{ 413{
177 if (--ref->cnt) 414 if (--ref->cnt)
178 return; 415 return;
179 416
180 if (pm && ref->ours) 417 if (pm && ref->ours)
181 XFreePixmap (s->display->dpy, pm); 418 XFreePixmap (s->dpy, pm);
182 419
183 delete ref; 420 delete ref;
184} 421}
185 422
186rxvt_img::~rxvt_img () 423rxvt_img::~rxvt_img ()
… …
189} 426}
190 427
191void 428void
192rxvt_img::alloc () 429rxvt_img::alloc ()
193{ 430{
194 pm = XCreatePixmap (s->display->dpy, s->display->root, w, h, format->depth); 431 pm = XCreatePixmap (s->dpy, s->display->root, w, h, format->depth);
195 ref = new pixref (w, h); 432 ref = new pixref (w, h);
196} 433}
197 434
435rxvt_img *
436rxvt_img::new_empty ()
437{
438 rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
439 img->alloc ();
440
441 return img;
442}
443
198Picture 444Picture
199rxvt_img::src_picture () 445rxvt_img::picture ()
200{ 446{
201 Display *dpy = s->display->dpy; 447 Display *dpy = s->dpy;
202 448
203 XRenderPictureAttributes pa; 449 XRenderPictureAttributes pa;
204 pa.repeat = repeat; 450 pa.repeat = repeat;
205 Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa); 451 Picture pic = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
206 452
… …
211rxvt_img::unshare () 457rxvt_img::unshare ()
212{ 458{
213 if (ref->cnt == 1 && ref->ours) 459 if (ref->cnt == 1 && ref->ours)
214 return; 460 return;
215 461
216 Pixmap pm2 = XCreatePixmap (s->display->dpy, s->display->root, ref->w, ref->h, format->depth); 462 Pixmap pm2 = XCreatePixmap (s->dpy, s->display->root, ref->w, ref->h, format->depth);
217 GC gc = XCreateGC (s->display->dpy, pm, 0, 0); 463 GC gc = XCreateGC (s->dpy, pm, 0, 0);
218 XCopyArea (s->display->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0); 464 XCopyArea (s->dpy, pm, pm2, gc, 0, 0, ref->w, ref->h, 0, 0);
219 XFreeGC (s->display->dpy, gc); 465 XFreeGC (s->dpy, gc);
220 466
221 destroy (); 467 destroy ();
222 468
223 pm = pm2; 469 pm = pm2;
224 ref = new pixref (ref->w, ref->h); 470 ref = new pixref (ref->w, ref->h);
225} 471}
226 472
227void 473void
474rxvt_img::fill (const rgba &c, int x, int y, int w, int h)
475{
476 XRenderColor rc = { c.r, c.g, c.b, c.a };
477
478 Display *dpy = s->dpy;
479 Picture src = picture ();
480 XRenderFillRectangle (dpy, PictOpSrc, src, &rc, x, y, w, h);
481 XRenderFreePicture (dpy, src);
482}
483
484void
228rxvt_img::fill (const rxvt_color &c) 485rxvt_img::fill (const rgba &c)
229{ 486{
230 XGCValues gcv; 487 fill (c, 0, 0, w, h);
231 gcv.foreground = c; 488}
232 GC gc = XCreateGC (s->display->dpy, pm, GCForeground, &gcv); 489
233 XFillRectangle (s->display->dpy, pm, gc, 0, 0, w, h); 490void
234 XFreeGC (s->display->dpy, gc); 491rxvt_img::add_alpha ()
492{
493 if (format->direct.alphaMask)
494 return;
495
496 composer cc (this, new rxvt_img (s, find_alpha_format_for (s->dpy, format), x, y, w, h, repeat));
497
498 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
499
500 rxvt_img *img = cc;
501
502 ::swap (img->ref, ref);
503 ::swap (img->pm , pm );
504
505 delete img;
235} 506}
236 507
237static void 508static void
238get_gaussian_kernel (int radius, int width, double *kernel, XFixed *params) 509get_gaussian_kernel (int radius, int width, nv *kernel, XFixed *params)
239{ 510{
240 double sigma = radius / 2.0; 511 nv sigma = radius / 2.0;
241 double scale = sqrt (2.0 * M_PI) * sigma; 512 nv scale = sqrt (2.0 * M_PI) * sigma;
242 double sum = 0.0; 513 nv sum = 0.0;
243 514
244 for (int i = 0; i < width; i++) 515 for (int i = 0; i < width; i++)
245 { 516 {
246 double x = i - width / 2; 517 nv x = i - width / 2;
247 kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale; 518 kernel[i] = exp (-(x * x) / (2.0 * sigma * sigma)) / scale;
248 sum += kernel[i]; 519 sum += kernel[i];
249 } 520 }
250 521
251 params[0] = XDoubleToFixed (width); 522 params[0] = XDoubleToFixed (width);
… …
259rxvt_img::blur (int rh, int rv) 530rxvt_img::blur (int rh, int rv)
260{ 531{
261 if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV)) 532 if (!(s->display->flags & DISPLAY_HAS_RENDER_CONV))
262 return clone (); 533 return clone ();
263 534
264 Display *dpy = s->display->dpy; 535 Display *dpy = s->dpy;
265 int size = max (rh, rv) * 2 + 1; 536 int size = max (rh, rv) * 2 + 1;
266 double *kernel = (double *)malloc (size * sizeof (double)); 537 nv *kernel = (nv *)malloc (size * sizeof (nv));
267 XFixed *params = (XFixed *)malloc ((size + 2) * sizeof (XFixed)); 538 XFixed *params = (XFixed *)malloc ((size + 2) * sizeof (XFixed));
268 rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat); 539 rxvt_img *img = new_empty ();
269 img->alloc ();
270 540
271 XRenderPictureAttributes pa; 541 XRenderPictureAttributes pa;
272 pa.repeat = RepeatPad; 542 pa.repeat = RepeatPad;
273 Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa); 543 Picture src = XRenderCreatePicture (dpy, pm, format, CPRepeat, &pa);
274 Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0); 544 Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
… …
309 w, h); 579 w, h);
310 } 580 }
311 581
312 free (kernel); 582 free (kernel);
313 free (params); 583 free (params);
584
314 XRenderFreePicture (dpy, src); 585 XRenderFreePicture (dpy, src);
315 XRenderFreePicture (dpy, dst); 586 XRenderFreePicture (dpy, dst);
316 XRenderFreePicture (dpy, tmp); 587 XRenderFreePicture (dpy, tmp);
317 588
318 return img; 589 return img;
319} 590}
320 591
321static Picture 592rxvt_img *
322create_xrender_mask (Display *dpy, Drawable drawable, Bool argb, Bool component_alpha) 593rxvt_img::muladd (nv mul, nv add)
323{ 594{
324 Pixmap pixmap = XCreatePixmap (dpy, drawable, 1, 1, argb ? 32 : 8); 595 // STEP 1: double the image width, fill all odd columns with white (==1)
325 596
326 XRenderPictFormat *format = XRenderFindStandardFormat (dpy, argb ? PictStandardARGB32 : PictStandardA8); 597 composer cc (this, new rxvt_img (s, format, 0, 0, w * 2, h, repeat));
327 XRenderPictureAttributes pa;
328 pa.repeat = RepeatNormal;
329 pa.component_alpha = component_alpha;
330 Picture mask = XRenderCreatePicture (dpy, pixmap, format, CPRepeat | CPComponentAlpha, &pa);
331 598
332 XFreePixmap (dpy, pixmap); 599 // why the hell does XRenderSetPictureTransform want a writable matrix :(
600 // that keeps us from just static const'ing this matrix.
601 XTransform h_double = {
602 0x08000, 0, 0,
603 0, 0x10000, 0,
604 0, 0, 0x10000
605 };
333 606
334 return mask; 607 XRenderSetPictureFilter (cc.dpy, cc.src, "nearest", 0, 0);
335} 608 XRenderSetPictureTransform (cc.dpy, cc.src, &h_double);
609 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
336 610
337static void 611 cc.mask (false, 2, 1);
612
613 static const XRenderColor c0 = { 0, 0, 0, 0 };
614 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &c0, 0, 0, 1, 1);
615 static const XRenderColor c1 = { 65535, 65535, 65535, 65535 };
616 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &c1, 1, 0, 1, 1);
617
618 Picture white = XRenderCreateSolidFill (cc.dpy, &c1);
619
620 XRenderComposite (cc.dpy, PictOpOver, white, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
621
622 XRenderFreePicture (cc.dpy, white);
623
624 // STEP 2: convolve the image with a 3x1 filter
625 // a 2x1 filter would obviously suffice, but given the total lack of specification
626 // for xrender, I expect different xrender implementations to randomly diverge.
627 // we also halve the image, and hope for the best (again, for lack of specs).
628 composer cc2 (cc.dstimg);
629
630 XFixed kernel [] = {
631 XDoubleToFixed (3), XDoubleToFixed (1),
632 XDoubleToFixed (0), XDoubleToFixed (mul), XDoubleToFixed (add)
633 };
634
635 XTransform h_halve = {
636 0x20000, 0, 0,
637 0, 0x10000, 0,
638 0, 0, 0x10000
639 };
640
641 XRenderSetPictureFilter (cc.dpy, cc2.src, "nearest", 0, 0);
642 XRenderSetPictureTransform (cc.dpy, cc2.src, &h_halve);
643 XRenderSetPictureFilter (cc.dpy, cc2.src, FilterConvolution, kernel, ecb_array_length (kernel));
644
645 XRenderComposite (cc.dpy, PictOpSrc, cc2.src, None, cc2.dst, 0, 0, 0, 0, 0, 0, w * 2, h);
646
647 return cc2;
648}
649
650ecb_noinline static void
338extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc) 651extract (int32_t cl0, int32_t cl1, int32_t &c, unsigned short &xc)
339{ 652{
340 int32_t x = clamp (c, cl0, cl1); 653 int32_t x = clamp (c, cl0, cl1);
341 c -= x; 654 c -= x;
342 xc = x; 655 xc = x;
343} 656}
344 657
345static bool 658ecb_noinline static bool
346extract (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) 659extract (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)
347{ 660{
348 extract (cl0, cl1, r, xr); 661 extract (cl0, cl1, r, xr);
349 extract (cl0, cl1, g, xg); 662 extract (cl0, cl1, g, xg);
350 extract (cl0, cl1, b, xb); 663 extract (cl0, cl1, b, xb);
… …
356void 669void
357rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a) 670rxvt_img::brightness (int32_t r, int32_t g, int32_t b, int32_t a)
358{ 671{
359 unshare (); 672 unshare ();
360 673
361 Display *dpy = s->display->dpy; 674 Display *dpy = s->dpy;
362 Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0); 675 Picture dst = XRenderCreatePicture (dpy, pm, format, 0, 0);
363 676
364 // loop should not be needed for brightness, as only -1..1 makes sense 677 // loop should not be needed for brightness, as only -1..1 makes sense
365 //while (r | g | b | a) 678 //while (r | g | b | a)
366 { 679 {
… …
390rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a) 703rxvt_img::contrast (int32_t r, int32_t g, int32_t b, int32_t a)
391{ 704{
392 if (r < 0 || g < 0 || b < 0 || a < 0) 705 if (r < 0 || g < 0 || b < 0 || a < 0)
393 rxvt_fatal ("rxvt_img::contrast does not support negative values.\n"); 706 rxvt_fatal ("rxvt_img::contrast does not support negative values.\n");
394 707
395 rxvt_img *img = new rxvt_img (s, format, x, y, w, h, repeat);
396 img->alloc ();
397
398 {
399 rxvt_color empty;
400 empty.set (s, rgba (0, 0, 0, 0));
401 img->fill (empty);
402 }
403
404 // premultiply (yeah, these are not exact, sue me or fix it) 708 // premultiply (yeah, these are not exact, sue me or fix it)
405 r = (r * (a >> 8)) >> 8; 709 r = (r * (a >> 8)) >> 8;
406 g = (g * (a >> 8)) >> 8; 710 g = (g * (a >> 8)) >> 8;
407 b = (b * (a >> 8)) >> 8; 711 b = (b * (a >> 8)) >> 8;
408 712
409 Display *dpy = s->display->dpy; 713 composer cc (this);
714 rxvt_img *img = cc;
715 img->fill (rgba (0, 0, 0, 0));
410 716
411 Picture src = src_picture (); 717 cc.mask (true);
412 Picture dst = XRenderCreatePicture (dpy, img->pm, format, 0, 0);
413 Picture mul = create_xrender_mask (dpy, pm, True, True);
414 718
415 //TODO: this operator does not yet implement some useful contrast 719 //TODO: this operator does not yet implement some useful contrast
416 while (r | g | b | a) 720 while (r | g | b | a)
417 { 721 {
418 unsigned short xr, xg, xb, xa; 722 unsigned short xr, xg, xb, xa;
419 XRenderColor mask_c; 723 XRenderColor mask_c;
420 724
421 if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha)) 725 if (extract (0, 65535, r, g, b, a, mask_c.red, mask_c.green, mask_c.blue, mask_c.alpha))
422 { 726 {
423 XRenderFillRectangle (dpy, PictOpSrc, mul, &mask_c, 0, 0, 1, 1); 727 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.msk, &mask_c, 0, 0, 1, 1);
424 XRenderComposite (dpy, PictOpAdd, src, mul, dst, 0, 0, 0, 0, 0, 0, w, h); 728 XRenderComposite (cc.dpy, PictOpAdd, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
425 } 729 }
426 } 730 }
427
428 XRenderFreePicture (dpy, mul);
429 XRenderFreePicture (dpy, dst);
430 XRenderFreePicture (dpy, src);
431 731
432 ::swap (img->ref, ref); 732 ::swap (img->ref, ref);
433 ::swap (img->pm , pm ); 733 ::swap (img->pm , pm );
434 734
435 delete img; 735 delete img;
436} 736}
437 737
738void
739rxvt_img::draw (rxvt_img *img, int op, nv mask)
740{
741 unshare ();
742
743 composer cc (img, this);
744
745 if (mask != 1.)
746 cc.mask (rgba (0, 0, 0, float_to_component (mask)));
747
748 XRenderComposite (cc.dpy, op, cc.src, cc.msk, cc.dst, x - img->x, y - img->y, 0, 0, 0, 0, w, h);
749}
750
438rxvt_img * 751rxvt_img *
439rxvt_img::clone () 752rxvt_img::clone ()
440{ 753{
441 return new rxvt_img (*this); 754 return new rxvt_img (*this);
442}
443
444static XRenderPictFormat *
445find_alpha_format_for (Display *dpy, XRenderPictFormat *format)
446{
447 if (format->direct.alphaMask)
448 return format; // already has alpha
449
450 // try to find a suitable alpha format, one bit alpha is enough for our purposes
451 if (format->type == PictTypeDirect)
452 for (int n = 0; XRenderPictFormat *f = XRenderFindFormat (dpy, 0, 0, n); ++n)
453 if (f->direct.alphaMask
454 && f->type == PictTypeDirect
455 && ecb_popcount32 (f->direct.redMask ) >= ecb_popcount32 (format->direct.redMask )
456 && ecb_popcount32 (f->direct.greenMask) >= ecb_popcount32 (format->direct.greenMask)
457 && ecb_popcount32 (f->direct.blueMask ) >= ecb_popcount32 (format->direct.blueMask ))
458 return f;
459
460 // should be a very good fallback
461 return XRenderFindStandardFormat (dpy, PictStandardARGB32);
462} 755}
463 756
464rxvt_img * 757rxvt_img *
465rxvt_img::reify () 758rxvt_img::reify ()
466{ 759{
467 if (x == 0 && y == 0 && w == ref->w && h == ref->h) 760 if (x == 0 && y == 0 && w == ref->w && h == ref->h)
468 return clone (); 761 return clone ();
469
470 Display *dpy = s->display->dpy;
471 762
472 // add an alpha channel if... 763 // add an alpha channel if...
473 bool alpha = !format->direct.alphaMask // pixmap has none yet 764 bool alpha = !format->direct.alphaMask // pixmap has none yet
474 && (x || y) // we need one because of non-zero offset 765 && (x || y) // we need one because of non-zero offset
475 && repeat == RepeatNone; // and we have no good pixels to fill with 766 && repeat == RepeatNone; // and we have no good pixels to fill with
476 767
477 rxvt_img *img = new rxvt_img (s, alpha ? find_alpha_format_for (dpy, format) : format, 0, 0, w, h, repeat); 768 composer cc (this, new rxvt_img (s, alpha ? find_alpha_format_for (s->dpy, format) : format,
478 img->alloc (); 769 0, 0, w, h, repeat));
479 770
480 Picture src = src_picture (); 771 if (repeat == RepeatNone)
481 Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0);
482
483 if (alpha)
484 { 772 {
485 XRenderColor rc = { 0, 0, 0, 0 }; 773 XRenderColor rc = { 0, 0, 0, 0 };
486 XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles 774 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);//TODO: split into four fillrectangles
487 XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, -x, -y, ref->w, ref->h); 775 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, 0, 0, 0, 0, x, y, ref->w, ref->h);
488 } 776 }
489 else 777 else
490 XRenderComposite (dpy, PictOpSrc, src, None, dst, x, y, 0, 0, 0, 0, w, h); 778 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, -x, -y, 0, 0, 0, 0, w, h);
491 779
492 XRenderFreePicture (dpy, src);
493 XRenderFreePicture (dpy, dst);
494
495 return img; 780 return cc;
496} 781}
497 782
498rxvt_img * 783rxvt_img *
499rxvt_img::sub_rect (int x, int y, int width, int height) 784rxvt_img::sub_rect (int x, int y, int width, int height)
500{ 785{
501 rxvt_img *img = clone (); 786 rxvt_img *img = clone ();
502 787
503 img->x += x; 788 img->x -= x;
504 img->y += y; 789 img->y -= y;
505 790
506 if (w != width || h != height) 791 if (w != width || h != height)
507 { 792 {
508 img->w = width; 793 img->w = width;
509 img->h = height; 794 img->h = height;
… …
515 800
516 return img; 801 return img;
517} 802}
518 803
519rxvt_img * 804rxvt_img *
520rxvt_img::transform (int new_width, int new_height, double matrix[9]) 805rxvt_img::transform (const nv matrix[3][3])
521{ 806{
522 rxvt_img *img = new rxvt_img (s, format, 0, 0, new_width, new_height, repeat); 807 return transform (mat3x3 (&matrix[0][0]));
523 img->alloc (); 808}
524 809
525 Display *dpy = s->display->dpy; 810rxvt_img *
526 Picture src = src_picture (); 811rxvt_img::transform (const nv *matrix)
527 Picture dst = XRenderCreatePicture (dpy, img->pm, img->format, 0, 0); 812{
813 mat3x3 m (matrix);
814
815 // calculate new pixel bounding box coordinates
816 nv rmin[2], rmax[2];
817
818 for (int i = 0; i < 2; ++i)
819 {
820 nv v;
821
822 v = m.apply1 (i, 0+x, 0+y); rmin [i] = rmax [i] = v;
823 v = m.apply1 (i, w+x, 0+y); min_it (rmin [i], v); max_it (rmax [i], v);
824 v = m.apply1 (i, 0+x, h+y); min_it (rmin [i], v); max_it (rmax [i], v);
825 v = m.apply1 (i, w+x, h+y); min_it (rmin [i], v); max_it (rmax [i], v);
826 }
827
828 float sx = rmin [0] - x;
829 float sy = rmin [1] - y;
830
831 // TODO: adjust matrix for subpixel accuracy
832 int nx = floor (rmin [0]);
833 int ny = floor (rmin [1]);
834
835 int new_width = ceil (rmax [0] - rmin [0]);
836 int new_height = ceil (rmax [1] - rmin [1]);
837
838 mat3x3 inv = (mat3x3::translate (-x, -y) * m * mat3x3::translate (x, y)).inverse ();
839
840 composer cc (this, new rxvt_img (s, format, nx, ny, new_width, new_height, repeat));
528 841
529 XTransform xfrm; 842 XTransform xfrm;
530 843
531 for (int i = 0; i < 3; ++i) 844 for (int i = 0; i < 3; ++i)
532 for (int j = 0; j < 3; ++j) 845 for (int j = 0; j < 3; ++j)
533 xfrm.matrix [i][j] = XDoubleToFixed (matrix [i * 3 + j]); 846 xfrm.matrix [i][j] = XDoubleToFixed (inv [i][j]);
534 847
535 xfrm.matrix [0][2] -= XDoubleToFixed (x);//TODO
536 xfrm.matrix [1][2] -= XDoubleToFixed (y);
537
538 XRenderSetPictureFilter (dpy, src, "good", 0, 0); 848 XRenderSetPictureFilter (cc.dpy, cc.src, "good", 0, 0);
539 XRenderSetPictureTransform (dpy, src, &xfrm); 849 XRenderSetPictureTransform (cc.dpy, cc.src, &xfrm);
540 XRenderComposite (dpy, PictOpSrc, src, None, dst, 0, 0, 0, 0, 0, 0, new_width, new_height); 850 XRenderComposite (cc.dpy, PictOpSrc, cc.src, None, cc.dst, sx, sy, 0, 0, 0, 0, new_width, new_height);
541 851
542 XRenderFreePicture (dpy, src);
543 XRenderFreePicture (dpy, dst);
544
545 return img; 852 return cc;
546} 853}
547 854
548rxvt_img * 855rxvt_img *
549rxvt_img::scale (int new_width, int new_height) 856rxvt_img::scale (int new_width, int new_height)
550{ 857{
551 if (w == new_width && h == new_height) 858 if (w == new_width && h == new_height)
552 return clone (); 859 return clone ();
553 860
554 double matrix[9] = {
555 w / (double)new_width, 0, 0,
556 0, h / (double)new_height, 0,
557 0, 0, 1
558 };
559
560 int old_repeat_mode = repeat; 861 int old_repeat_mode = repeat;
561 repeat = RepeatPad; // not right, but xrender can't proeprly scale it seems 862 repeat = RepeatPad; // not right, but xrender can't properly scale it seems
562 863
563 rxvt_img *img = transform (new_width, new_height, matrix); 864 rxvt_img *img = transform (mat3x3::scale (new_width / (nv)w, new_height / (nv)h));
564 865
565 repeat = old_repeat_mode; 866 repeat = old_repeat_mode;
566 img->repeat = repeat; 867 img->repeat = repeat;
567 868
568 return img; 869 return img;
569} 870}
570 871
571rxvt_img * 872rxvt_img *
572rxvt_img::rotate (int new_width, int new_height, int x, int y, double phi) 873rxvt_img::rotate (int cx, int cy, nv phi)
573{ 874{
574 double s = sin (phi); 875 move (-cx, -cy);
575 double c = cos (phi); 876 rxvt_img *img = transform (mat3x3::rotate (phi));
877 move ( cx, cy);
878 img->move (cx, cy);
576 879
577 double matrix[9] = { 880 return img;
578 c, -s, -c * x + s * y + x,
579 s, c, -s * x - c * y + y,
580 0, 0, 1
581 };
582
583 return transform (new_width, new_height, matrix);
584} 881}
585 882
586rxvt_img * 883rxvt_img *
587rxvt_img::convert_format (XRenderPictFormat *new_format, const rxvt_color &bg) 884rxvt_img::convert_format (XRenderPictFormat *new_format, const rgba &bg)
588{ 885{
589 if (new_format == format) 886 if (new_format == format)
590 return clone (); 887 return clone ();
591 888
592 rxvt_img *img = new rxvt_img (s, new_format, x, y, w, h, repeat); 889 composer cc (this, new rxvt_img (s, new_format, x, y, w, h, repeat));
593 img->alloc ();
594 890
595 Display *dpy = s->display->dpy;
596 Picture src = src_picture ();
597 Picture dst = XRenderCreatePicture (dpy, img->pm, new_format, 0, 0);
598 int op = PictOpSrc; 891 int op = PictOpSrc;
599 892
600 if (format->direct.alphaMask && !new_format->direct.alphaMask) 893 if (format->direct.alphaMask && !new_format->direct.alphaMask)
601 { 894 {
602 // does it have to be that complicated 895 // does it have to be that complicated
603 rgba c;
604 bg.get (c);
605
606 XRenderColor rc = { c.r, c.g, c.b, 0xffff }; 896 XRenderColor rc = { bg.r, bg.g, bg.b, bg.a };
607 XRenderFillRectangle (dpy, PictOpSrc, dst, &rc, 0, 0, w, h); 897 XRenderFillRectangle (cc.dpy, PictOpSrc, cc.dst, &rc, 0, 0, w, h);
608 898
609 op = PictOpOver; 899 op = PictOpOver;
610 } 900 }
611 901
612 XRenderComposite (dpy, op, src, None, dst, 0, 0, 0, 0, 0, 0, w, h); 902 XRenderComposite (cc.dpy, op, cc.src, None, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
613 903
614 XRenderFreePicture (dpy, src); 904 return cc;
615 XRenderFreePicture (dpy, dst); 905}
906
907rxvt_img *
908rxvt_img::tint (const rgba &c)
909{
910 composer cc (this);
911 cc.mask (true);
912 cc.fill (c);
913
914 XRenderComposite (cc.dpy, PictOpSrc, cc.src, cc.msk, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
915
916 return cc;
917}
918
919rxvt_img *
920rxvt_img::shade (nv factor, rgba c)
921{
922 clamp_it (factor, -1., 1.);
923 factor++;
924
925 if (factor > 1)
926 {
927 c.r = c.r * (2 - factor);
928 c.g = c.g * (2 - factor);
929 c.b = c.b * (2 - factor);
930 }
931 else
932 {
933 c.r = c.r * factor;
934 c.g = c.g * factor;
935 c.b = c.b * factor;
936 }
937
938 rxvt_img *img = this->tint (c);
939
940 if (factor > 1)
941 {
942 c.a = 0xffff;
943 c.r =
944 c.g =
945 c.b = 0xffff * (factor - 1);
946
947 img->brightness (c.r, c.g, c.b, c.a);
948 }
616 949
617 return img; 950 return img;
618} 951}
619 952
620rxvt_img * 953rxvt_img *
621rxvt_img::blend (rxvt_img *img, double factor) 954rxvt_img::filter (const char *name, int nparams, nv *params)
622{ 955{
623 rxvt_img *img2 = clone (); 956 composer cc (this);
624 Display *dpy = s->display->dpy;
625 Picture src = img->src_picture ();
626 Picture dst = XRenderCreatePicture (dpy, img2->pm, img2->format, 0, 0);
627 Picture mask = create_xrender_mask (dpy, img->pm, False, False);
628 957
629 XRenderColor mask_c; 958 XFixed *xparams = rxvt_temp_buf<XFixed> (nparams);
630 959
631 mask_c.alpha = float_to_component (factor); 960 for (int i = 0; i < nparams; ++i)
632 mask_c.red = 961 xparams [i] = XDoubleToFixed (params [i]);
633 mask_c.green =
634 mask_c.blue = 0;
635 XRenderFillRectangle (dpy, PictOpSrc, mask, &mask_c, 0, 0, 1, 1);
636 962
963 XRenderSetPictureFilter (cc.dpy, cc.src, name, xparams, nparams);
964
637 XRenderComposite (dpy, PictOpOver, src, mask, dst, 0, 0, 0, 0, 0, 0, w, h); 965 XRenderComposite (cc.dpy, PictOpSrc, cc.src, 0, cc.dst, 0, 0, 0, 0, 0, 0, w, h);
638 966
639 XRenderFreePicture (dpy, src);
640 XRenderFreePicture (dpy, dst);
641 XRenderFreePicture (dpy, mask);
642
643 return img2; 967 return cc;
644} 968}
645 969
646#endif 970#endif
647 971

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