Merge branch 'wip/alttab'
[mikachu/openbox.git] / render / render.c
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
2
3    render.c for the Openbox window manager
4    Copyright (c) 2006        Mikael Magnusson
5    Copyright (c) 2003-2007   Dana Jansens
6    Copyright (c) 2003        Derek Foreman
7
8    This program is free software; you can redistribute it and/or modify
9    it under the terms of the GNU General Public License as published by
10    the Free Software Foundation; either version 2 of the License, or
11    (at your option) any later version.
12
13    This program is distributed in the hope that it will be useful,
14    but WITHOUT ANY WARRANTY; without even the implied warranty of
15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16    GNU General Public License for more details.
17
18    See the COPYING file for a copy of the GNU General Public License.
19 */
20
21 #include "render.h"
22 #include "gradient.h"
23 #include "font.h"
24 #include "mask.h"
25 #include "color.h"
26 #include "image.h"
27 #include "theme.h"
28
29 #include <glib.h>
30 #include <X11/Xlib.h>
31 #include <X11/Xutil.h>
32 #include <X11/Xft/Xft.h>
33
34 #ifdef HAVE_STDLIB_H
35 #  include <stdlib.h>
36 #endif
37
38 static void pixel_data_to_pixmap(RrAppearance *l,
39                                  gint x, gint y, gint w, gint h);
40
41 Pixmap RrPaintPixmap(RrAppearance *a, gint w, gint h)
42 {
43     gint i, transferred = 0, force_transfer = 0;
44     Pixmap oldp = None;
45     RrRect tarea; /* area in which to draw textures */
46     gboolean resized;
47
48     if (w <= 0 || h <= 0) return None;
49
50     if (a->surface.parentx < 0 || a->surface.parenty < 0) {
51         /* ob_debug("Invalid parent co-ordinates\n"); */
52         return None;
53     }
54
55     if (a->surface.grad == RR_SURFACE_PARENTREL &&
56         (a->surface.parentx >= a->surface.parent->w ||
57          a->surface.parenty >= a->surface.parent->h))
58     {
59         return None;
60     }
61
62     resized = (a->w != w || a->h != h);
63
64     oldp = a->pixmap; /* save to free after changing the visible pixmap */
65     a->pixmap = XCreatePixmap(RrDisplay(a->inst),
66                               RrRootWindow(a->inst),
67                               w, h, RrDepth(a->inst));
68
69     g_assert(a->pixmap != None);
70     a->w = w;
71     a->h = h;
72
73     if (a->xftdraw != NULL)
74         XftDrawDestroy(a->xftdraw);
75     a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
76                                RrVisual(a->inst), RrColormap(a->inst));
77     g_assert(a->xftdraw != NULL);
78
79     if (resized) {
80         g_free(a->surface.pixel_data);
81         a->surface.pixel_data = g_new(RrPixel32, w * h);
82     }
83
84     RrRender(a, w, h);
85
86     {
87         gint l, t, r, b;
88         RrMargins(a, &l, &t, &r, &b);
89         RECT_SET(tarea, l, t, w - l - r, h - t - b);
90     }
91
92     for (i = 0; i < a->textures; i++) {
93         switch (a->texture[i].type) {
94         case RR_TEXTURE_NONE:
95             break;
96         case RR_TEXTURE_TEXT:
97             if (!transferred) {
98                 transferred = 1;
99                 if ((a->surface.grad != RR_SURFACE_SOLID)
100                     || (a->surface.interlaced))
101                     pixel_data_to_pixmap(a, 0, 0, w, h);
102             }
103             if (a->xftdraw == NULL) {
104                 a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
105                                            RrVisual(a->inst),
106                                            RrColormap(a->inst));
107             }
108             RrFontDraw(a->xftdraw, &a->texture[i].data.text, &tarea);
109             break;
110         case RR_TEXTURE_LINE_ART:
111             if (!transferred) {
112                 transferred = 1;
113                 if ((a->surface.grad != RR_SURFACE_SOLID)
114                     || (a->surface.interlaced))
115                     pixel_data_to_pixmap(a, 0, 0, w, h);
116             }
117             XDrawLine(RrDisplay(a->inst), a->pixmap,
118                       RrColorGC(a->texture[i].data.lineart.color),
119                       a->texture[i].data.lineart.x1,
120                       a->texture[i].data.lineart.y1,
121                       a->texture[i].data.lineart.x2,
122                       a->texture[i].data.lineart.y2);
123             break;
124         case RR_TEXTURE_MASK:
125             if (!transferred) {
126                 transferred = 1;
127                 if ((a->surface.grad != RR_SURFACE_SOLID)
128                     || (a->surface.interlaced))
129                     pixel_data_to_pixmap(a, 0, 0, w, h);
130             }
131             RrPixmapMaskDraw(a->pixmap, &a->texture[i].data.mask, &tarea);
132             break;
133         case RR_TEXTURE_RGBA:
134             g_assert(!transferred);
135             {
136                 RrRect narea = tarea;
137                 RrTextureRGBA *rgb = &a->texture[i].data.rgba;
138                 if (rgb->twidth)
139                     narea.width = MIN(tarea.width, rgb->twidth);
140                 if (rgb->theight)
141                     narea.height = MIN(tarea.height, rgb->theight);
142                 narea.x += rgb->tx;
143                 narea.y += rgb->ty;
144                 RrImageDraw(a->surface.pixel_data,
145                             &a->texture[i].data.rgba,
146                             a->w, a->h,
147                             &narea);
148             }
149             force_transfer = 1;
150         break;
151         }
152     }
153
154     if (!transferred) {
155         transferred = 1;
156         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced) ||
157             force_transfer)
158         {
159             pixel_data_to_pixmap(a, 0, 0, w, h);
160         }
161     }
162
163     return oldp;
164 }
165
166 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
167 {
168     Pixmap oldp;
169
170     oldp = RrPaintPixmap(a, w, h);
171     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
172     XClearWindow(RrDisplay(a->inst), win);
173     /* free this after changing the visible pixmap */
174     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
175 }
176
177 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
178 {
179   RrAppearance *out;
180
181   out = g_new0(RrAppearance, 1);
182   out->inst = inst;
183   out->textures = numtex;
184   out->surface.bevel_light_adjust = 128;
185   out->surface.bevel_dark_adjust = 64;
186   if (numtex) out->texture = g_new0(RrTexture, numtex);
187
188   return out;
189 }
190
191 void RrAppearanceRemoveTextures(RrAppearance *a)
192 {
193     g_free(a->texture);
194     a->textures = 0;
195 }
196
197 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
198 {
199     g_assert(a->textures == 0);
200
201     a->textures = numtex;
202     if (numtex) a->texture = g_new0(RrTexture, numtex);
203 }
204
205 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
206 {
207     RrSurface *spo, *spc;
208     RrAppearance *copy = g_new(RrAppearance, 1);
209     gint i;
210
211     copy->inst = orig->inst;
212
213     spo = &(orig->surface);
214     spc = &(copy->surface);
215     spc->grad = spo->grad;
216     spc->relief = spo->relief;
217     spc->bevel = spo->bevel;
218     if (spo->primary != NULL)
219         spc->primary = RrColorNew(copy->inst,
220                                   spo->primary->r,
221                                   spo->primary->g,
222                                   spo->primary->b);
223     else spc->primary = NULL;
224
225     if (spo->secondary != NULL)
226         spc->secondary = RrColorNew(copy->inst,
227                                     spo->secondary->r,
228                                     spo->secondary->g,
229                                     spo->secondary->b);
230     else spc->secondary = NULL;
231
232     if (spo->border_color != NULL)
233         spc->border_color = RrColorNew(copy->inst,
234                                        spo->border_color->r,
235                                        spo->border_color->g,
236                                        spo->border_color->b);
237     else spc->border_color = NULL;
238
239     if (spo->interlace_color != NULL)
240         spc->interlace_color = RrColorNew(copy->inst,
241                                        spo->interlace_color->r,
242                                        spo->interlace_color->g,
243                                        spo->interlace_color->b);
244     else spc->interlace_color = NULL;
245
246     if (spo->bevel_dark != NULL)
247         spc->bevel_dark = RrColorNew(copy->inst,
248                                      spo->bevel_dark->r,
249                                      spo->bevel_dark->g,
250                                      spo->bevel_dark->b);
251     else spc->bevel_dark = NULL;
252
253     if (spo->bevel_light != NULL)
254         spc->bevel_light = RrColorNew(copy->inst,
255                                       spo->bevel_light->r,
256                                       spo->bevel_light->g,
257                                       spo->bevel_light->b);
258     else spc->bevel_light = NULL;
259
260     if (spo->split_primary != NULL)
261         spc->split_primary = RrColorNew(copy->inst,
262                                         spo->split_primary->r,
263                                         spo->split_primary->g,
264                                         spo->split_primary->b);
265     else spc->split_primary = NULL;
266
267     if (spo->split_secondary != NULL)
268         spc->split_secondary = RrColorNew(copy->inst,
269                                         spo->split_secondary->r,
270                                         spo->split_secondary->g,
271                                         spo->split_secondary->b);
272     else spc->split_secondary = NULL;
273
274     spc->interlaced = spo->interlaced;
275     spc->bevel_light_adjust = spo->bevel_light_adjust;
276     spc->bevel_dark_adjust = spo->bevel_dark_adjust;
277     spc->border = spo->border;
278     spc->parent = NULL;
279     spc->parentx = spc->parenty = 0;
280     spc->pixel_data = NULL;
281
282     copy->textures = orig->textures;
283     copy->texture = g_memdup(orig->texture,
284                              orig->textures * sizeof(RrTexture));
285     for (i = 0; i < copy->textures; ++i)
286         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
287             copy->texture[i].data.rgba.cache = NULL;
288         }
289     copy->pixmap = None;
290     copy->xftdraw = NULL;
291     copy->w = copy->h = 0;
292     return copy;
293 }
294
295 void RrAppearanceFree(RrAppearance *a)
296 {
297     gint i;
298
299     if (a) {
300         RrSurface *p;
301         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
302         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
303         for (i = 0; i < a->textures; ++i)
304             if (a->texture[i].type == RR_TEXTURE_RGBA) {
305                 g_free(a->texture[i].data.rgba.cache);
306                 a->texture[i].data.rgba.cache = NULL;
307             }
308         if (a->textures)
309             g_free(a->texture);
310         p = &a->surface;
311         RrColorFree(p->primary);
312         RrColorFree(p->secondary);
313         RrColorFree(p->border_color);
314         RrColorFree(p->interlace_color);
315         RrColorFree(p->bevel_dark);
316         RrColorFree(p->bevel_light);
317         RrColorFree(p->split_primary);
318         RrColorFree(p->split_secondary);
319         g_free(p->pixel_data);
320         p->pixel_data = NULL;
321         g_free(a);
322     }
323 }
324
325
326 static void pixel_data_to_pixmap(RrAppearance *l,
327                                  gint x, gint y, gint w, gint h)
328 {
329     RrPixel32 *in, *scratch;
330     Pixmap out;
331     XImage *im = NULL;
332     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
333                       ZPixmap, 0, NULL, w, h, 32, 0);
334     g_assert(im != NULL);
335
336     in = l->surface.pixel_data;
337     out = l->pixmap;
338
339 /* this malloc is a complete waste of time on normal 32bpp
340    as reduce_depth just sets im->data = data and returns
341 */
342     scratch = g_new(RrPixel32, im->width * im->height);
343     im->data = (gchar*) scratch;
344     RrReduceDepth(l->inst, in, im);
345     XPutImage(RrDisplay(l->inst), out,
346               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
347               im, 0, 0, x, y, w, h);
348     im->data = NULL;
349     XDestroyImage(im);
350     g_free(scratch);
351 }
352
353 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
354 {
355     *l = *t = *r = *b = 0;
356
357     if (a->surface.grad != RR_SURFACE_PARENTREL) {
358         if (a->surface.relief != RR_RELIEF_FLAT) {
359             switch (a->surface.bevel) {
360             case RR_BEVEL_1:
361                 *l = *t = *r = *b = 1;
362                 break;
363             case RR_BEVEL_2:
364                 *l = *t = *r = *b = 2;
365                 break;
366             }
367         } else if (a->surface.border) {
368             *l = *t = *r = *b = 1;
369         }
370     }
371 }
372
373 void RrMinSize(RrAppearance *a, gint *w, gint *h)
374 {
375     *w = RrMinWidth(a);
376     *h = RrMinHeight(a);
377 }
378
379 gint RrMinWidth(RrAppearance *a)
380 {
381     gint i;
382     RrSize *m;
383     gint l, t, r, b;
384     gint w = 0;
385
386     for (i = 0; i < a->textures; ++i) {
387         switch (a->texture[i].type) {
388         case RR_TEXTURE_NONE:
389             break;
390         case RR_TEXTURE_MASK:
391             w = MAX(w, a->texture[i].data.mask.mask->width);
392             break;
393         case RR_TEXTURE_TEXT:
394             m = RrFontMeasureString(a->texture[i].data.text.font,
395                                     a->texture[i].data.text.string,
396                                     a->texture[i].data.text.shadow_offset_x,
397                                     a->texture[i].data.text.shadow_offset_y,
398                                     a->texture[i].data.text.flow,
399                                     a->texture[i].data.text.maxwidth);
400             w = MAX(w, m->width);
401             g_free(m);
402             break;
403         case RR_TEXTURE_RGBA:
404             w += MAX(w, a->texture[i].data.rgba.width);
405             break;
406         case RR_TEXTURE_LINE_ART:
407             w += MAX(w, MAX(a->texture[i].data.lineart.x1,
408                             a->texture[i].data.lineart.x2));
409             break;
410         }
411     }
412
413     RrMargins(a, &l, &t, &r, &b);
414
415     w += l + r;
416
417     if (w < 1) w = 1;
418     return w;
419 }
420
421 gint RrMinHeight(RrAppearance *a)
422 {
423     gint i;
424     gint l, t, r, b;
425     RrSize *m;
426     gint h = 0;
427
428     for (i = 0; i < a->textures; ++i) {
429         switch (a->texture[i].type) {
430         case RR_TEXTURE_NONE:
431             break;
432         case RR_TEXTURE_MASK:
433             h = MAX(h, a->texture[i].data.mask.mask->height);
434             break;
435         case RR_TEXTURE_TEXT:
436             if (a->texture[i].data.text.flow) {
437                 g_assert(a->texture[i].data.text.string != NULL);
438
439                 m = RrFontMeasureString
440                     (a->texture[i].data.text.font,
441                      a->texture[i].data.text.string,
442                      a->texture[i].data.text.shadow_offset_x,
443                      a->texture[i].data.text.shadow_offset_y,
444                      a->texture[i].data.text.flow,
445                      a->texture[i].data.text.maxwidth);
446                 h += MAX(h, m->height);
447                 g_free(m);
448             }
449             else
450                 h += MAX(h,
451                          RrFontHeight
452                          (a->texture[i].data.text.font,
453                           a->texture[i].data.text.shadow_offset_y));
454             break;
455         case RR_TEXTURE_RGBA:
456             h += MAX(h, a->texture[i].data.rgba.height);
457             break;
458         case RR_TEXTURE_LINE_ART:
459             h += MAX(h, MAX(a->texture[i].data.lineart.y1,
460                             a->texture[i].data.lineart.y2));
461             break;
462         }
463     }
464
465     RrMargins(a, &l, &t, &r, &b);
466
467     h += t + b;
468
469     if (h < 1) h = 1;
470     return h;
471 }
472
473 static void reverse_bits(gchar *c, gint n)
474 {
475     gint i;
476     for (i = 0; i < n; i++, c++)
477         *c = (((*c * 0x0802UL & 0x22110UL) |
478                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
479 }
480
481 gboolean RrPixmapToRGBA(const RrInstance *inst,
482                         Pixmap pmap, Pixmap mask,
483                         gint *w, gint *h, RrPixel32 **data)
484 {
485     Window xr;
486     gint xx, xy;
487     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
488     XImage *xi, *xm = NULL;
489
490     if (!XGetGeometry(RrDisplay(inst), pmap,
491                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
492         return FALSE;
493
494     if (mask) {
495         if (!XGetGeometry(RrDisplay(inst), mask,
496                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
497             return FALSE;
498         if (pw != mw || ph != mh || xd != 1)
499             return FALSE;
500     }
501
502     xi = XGetImage(RrDisplay(inst), pmap,
503                    0, 0, pw, ph, 0xffffffff, ZPixmap);
504     if (!xi)
505         return FALSE;
506
507     if (mask) {
508         xm = XGetImage(RrDisplay(inst), mask,
509                        0, 0, mw, mh, 0xffffffff, ZPixmap);
510         if (!xm) {
511             XDestroyImage(xi);
512             return FALSE;
513         }
514         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
515             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
516     }
517
518     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
519         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
520
521     *data = g_new(RrPixel32, pw * ph);
522     RrIncreaseDepth(inst, *data, xi);
523
524     if (mask) {
525         /* apply transparency from the mask */
526         di = 0;
527         for (i = 0, y = 0; y < ph; ++y) {
528             for (x = 0; x < pw; ++x, ++i) {
529                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
530                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
531             }
532             di += xm->bytes_per_line;
533         }
534     }
535
536     *w = pw;
537     *h = ph;
538
539     XDestroyImage(xi);
540     if (mask)
541         XDestroyImage(xm);
542
543     return TRUE;
544 }