allow font rendering to use multiple lines
[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             RrImageDraw(a->surface.pixel_data,
136                         &a->texture[i].data.rgba,
137                         a->w, a->h,
138                         &tarea);
139             force_transfer = 1;
140         break;
141         }
142     }
143
144     if (!transferred) {
145         transferred = 1;
146         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced) ||
147             force_transfer)
148         {
149             pixel_data_to_pixmap(a, 0, 0, w, h);
150         }
151     }
152
153     return oldp;
154 }
155
156 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
157 {
158     Pixmap oldp;
159
160     oldp = RrPaintPixmap(a, w, h);
161     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
162     XClearWindow(RrDisplay(a->inst), win);
163     /* free this after changing the visible pixmap */
164     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
165 }
166
167 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
168 {
169   RrAppearance *out;
170
171   out = g_new0(RrAppearance, 1);
172   out->inst = inst;
173   out->textures = numtex;
174   out->surface.bevel_light_adjust = 128;
175   out->surface.bevel_dark_adjust = 64;
176   if (numtex) out->texture = g_new0(RrTexture, numtex);
177
178   return out;
179 }
180
181 void RrAppearanceRemoveTextures(RrAppearance *a)
182 {
183     g_free(a->texture);
184     a->textures = 0;
185 }
186
187 void RrAppearanceAddTextures(RrAppearance *a, gint numtex)
188 {
189     g_assert(a->textures == 0);
190
191     a->textures = numtex;
192     if (numtex) a->texture = g_new0(RrTexture, numtex);
193 }
194
195 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
196 {
197     RrSurface *spo, *spc;
198     RrAppearance *copy = g_new(RrAppearance, 1);
199     gint i;
200
201     copy->inst = orig->inst;
202
203     spo = &(orig->surface);
204     spc = &(copy->surface);
205     spc->grad = spo->grad;
206     spc->relief = spo->relief;
207     spc->bevel = spo->bevel;
208     if (spo->primary != NULL)
209         spc->primary = RrColorNew(copy->inst,
210                                   spo->primary->r,
211                                   spo->primary->g,
212                                   spo->primary->b);
213     else spc->primary = NULL;
214
215     if (spo->secondary != NULL)
216         spc->secondary = RrColorNew(copy->inst,
217                                     spo->secondary->r,
218                                     spo->secondary->g,
219                                     spo->secondary->b);
220     else spc->secondary = NULL;
221
222     if (spo->border_color != NULL)
223         spc->border_color = RrColorNew(copy->inst,
224                                        spo->border_color->r,
225                                        spo->border_color->g,
226                                        spo->border_color->b);
227     else spc->border_color = NULL;
228
229     if (spo->interlace_color != NULL)
230         spc->interlace_color = RrColorNew(copy->inst,
231                                        spo->interlace_color->r,
232                                        spo->interlace_color->g,
233                                        spo->interlace_color->b);
234     else spc->interlace_color = NULL;
235
236     if (spo->bevel_dark != NULL)
237         spc->bevel_dark = RrColorNew(copy->inst,
238                                      spo->bevel_dark->r,
239                                      spo->bevel_dark->g,
240                                      spo->bevel_dark->b);
241     else spc->bevel_dark = NULL;
242
243     if (spo->bevel_light != NULL)
244         spc->bevel_light = RrColorNew(copy->inst,
245                                       spo->bevel_light->r,
246                                       spo->bevel_light->g,
247                                       spo->bevel_light->b);
248     else spc->bevel_light = NULL;
249
250     if (spo->split_primary != NULL)
251         spc->split_primary = RrColorNew(copy->inst,
252                                         spo->split_primary->r,
253                                         spo->split_primary->g,
254                                         spo->split_primary->b);
255     else spc->split_primary = NULL;
256
257     if (spo->split_secondary != NULL)
258         spc->split_secondary = RrColorNew(copy->inst,
259                                         spo->split_secondary->r,
260                                         spo->split_secondary->g,
261                                         spo->split_secondary->b);
262     else spc->split_secondary = NULL;
263
264     spc->interlaced = spo->interlaced;
265     spc->bevel_light_adjust = spo->bevel_light_adjust;
266     spc->bevel_dark_adjust = spo->bevel_dark_adjust;
267     spc->border = spo->border;
268     spc->parent = NULL;
269     spc->parentx = spc->parenty = 0;
270     spc->pixel_data = NULL;
271
272     copy->textures = orig->textures;
273     copy->texture = g_memdup(orig->texture,
274                              orig->textures * sizeof(RrTexture));
275     for (i = 0; i < copy->textures; ++i)
276         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
277             copy->texture[i].data.rgba.cache = NULL;
278         }
279     copy->pixmap = None;
280     copy->xftdraw = NULL;
281     copy->w = copy->h = 0;
282     return copy;
283 }
284
285 void RrAppearanceFree(RrAppearance *a)
286 {
287     gint i;
288
289     if (a) {
290         RrSurface *p;
291         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
292         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
293         for (i = 0; i < a->textures; ++i)
294             if (a->texture[i].type == RR_TEXTURE_RGBA) {
295                 g_free(a->texture[i].data.rgba.cache);
296                 a->texture[i].data.rgba.cache = NULL;
297             }
298         if (a->textures)
299             g_free(a->texture);
300         p = &a->surface;
301         RrColorFree(p->primary);
302         RrColorFree(p->secondary);
303         RrColorFree(p->border_color);
304         RrColorFree(p->interlace_color);
305         RrColorFree(p->bevel_dark);
306         RrColorFree(p->bevel_light);
307         RrColorFree(p->split_primary);
308         RrColorFree(p->split_secondary);
309         g_free(p->pixel_data);
310         p->pixel_data = NULL;
311         g_free(a);
312     }
313 }
314
315
316 static void pixel_data_to_pixmap(RrAppearance *l,
317                                  gint x, gint y, gint w, gint h)
318 {
319     RrPixel32 *in, *scratch;
320     Pixmap out;
321     XImage *im = NULL;
322     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
323                       ZPixmap, 0, NULL, w, h, 32, 0);
324     g_assert(im != NULL);
325
326     in = l->surface.pixel_data;
327     out = l->pixmap;
328
329 /* this malloc is a complete waste of time on normal 32bpp
330    as reduce_depth just sets im->data = data and returns
331 */
332     scratch = g_new(RrPixel32, im->width * im->height);
333     im->data = (gchar*) scratch;
334     RrReduceDepth(l->inst, in, im);
335     XPutImage(RrDisplay(l->inst), out,
336               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
337               im, 0, 0, x, y, w, h);
338     im->data = NULL;
339     XDestroyImage(im);
340     g_free(scratch);
341 }
342
343 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
344 {
345     *l = *t = *r = *b = 0;
346
347     if (a->surface.grad != RR_SURFACE_PARENTREL) {
348         if (a->surface.relief != RR_RELIEF_FLAT) {
349             switch (a->surface.bevel) {
350             case RR_BEVEL_1:
351                 *l = *t = *r = *b = 1;
352                 break;
353             case RR_BEVEL_2:
354                 *l = *t = *r = *b = 2;
355                 break;
356             }
357         } else if (a->surface.border) {
358             *l = *t = *r = *b = 1;
359         }
360     }
361 }
362
363 void RrMinSize(RrAppearance *a, gint *w, gint *h)
364 {
365     *w = RrMinWidth(a);
366     *h = RrMinHeight(a);
367 }
368
369 gint RrMinWidth(RrAppearance *a)
370 {
371     gint i;
372     RrSize *m;
373     gint l, t, r, b;
374     gint w = 0;
375
376     for (i = 0; i < a->textures; ++i) {
377         switch (a->texture[i].type) {
378         case RR_TEXTURE_NONE:
379             break;
380         case RR_TEXTURE_MASK:
381             w = MAX(w, a->texture[i].data.mask.mask->width);
382             break;
383         case RR_TEXTURE_TEXT:
384             m = RrFontMeasureString(a->texture[i].data.text.font,
385                                     a->texture[i].data.text.string,
386                                     a->texture[i].data.text.shadow_offset_x,
387                                     a->texture[i].data.text.shadow_offset_y,
388                                     a->texture[i].data.text.flow,
389                                     a->texture[i].data.text.maxwidth);
390             w = MAX(w, m->width);
391             g_free(m);
392             break;
393         case RR_TEXTURE_RGBA:
394             w += MAX(w, a->texture[i].data.rgba.width);
395             break;
396         case RR_TEXTURE_LINE_ART:
397             w += MAX(w, MAX(a->texture[i].data.lineart.x1,
398                             a->texture[i].data.lineart.x2));
399             break;
400         }
401     }
402
403     RrMargins(a, &l, &t, &r, &b);
404
405     w += l + r;
406
407     if (w < 1) w = 1;
408     return w;
409 }
410
411 gint RrMinHeight(RrAppearance *a)
412 {
413     gint i;
414     gint l, t, r, b;
415     RrSize *m;
416     gint h = 0;
417
418     for (i = 0; i < a->textures; ++i) {
419         switch (a->texture[i].type) {
420         case RR_TEXTURE_NONE:
421             break;
422         case RR_TEXTURE_MASK:
423             h = MAX(h, a->texture[i].data.mask.mask->height);
424             break;
425         case RR_TEXTURE_TEXT:
426             if (a->texture[i].data.text.flow) {
427                 g_assert(a->texture[i].data.text.string != NULL);
428
429                 m = RrFontMeasureString
430                     (a->texture[i].data.text.font,
431                      a->texture[i].data.text.string,
432                      a->texture[i].data.text.shadow_offset_x,
433                      a->texture[i].data.text.shadow_offset_y,
434                      a->texture[i].data.text.flow,
435                      a->texture[i].data.text.maxwidth);
436                 h += MAX(h, m->height);
437                 g_free(m);
438             }
439             else
440                 h += MAX(h,
441                          RrFontHeight
442                          (a->texture[i].data.text.font,
443                           a->texture[i].data.text.shadow_offset_y));
444             break;
445         case RR_TEXTURE_RGBA:
446             h += MAX(h, a->texture[i].data.rgba.height);
447             break;
448         case RR_TEXTURE_LINE_ART:
449             h += MAX(h, MAX(a->texture[i].data.lineart.y1,
450                             a->texture[i].data.lineart.y2));
451             break;
452         }
453     }
454
455     RrMargins(a, &l, &t, &r, &b);
456
457     h += t + b;
458
459     if (h < 1) h = 1;
460     return h;
461 }
462
463 static void reverse_bits(gchar *c, gint n)
464 {
465     gint i;
466     for (i = 0; i < n; i++, c++)
467         *c = (((*c * 0x0802UL & 0x22110UL) |
468                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
469 }
470
471 gboolean RrPixmapToRGBA(const RrInstance *inst,
472                         Pixmap pmap, Pixmap mask,
473                         gint *w, gint *h, RrPixel32 **data)
474 {
475     Window xr;
476     gint xx, xy;
477     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
478     XImage *xi, *xm = NULL;
479
480     if (!XGetGeometry(RrDisplay(inst), pmap,
481                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
482         return FALSE;
483
484     if (mask) {
485         if (!XGetGeometry(RrDisplay(inst), mask,
486                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
487             return FALSE;
488         if (pw != mw || ph != mh || xd != 1)
489             return FALSE;
490     }
491
492     xi = XGetImage(RrDisplay(inst), pmap,
493                    0, 0, pw, ph, 0xffffffff, ZPixmap);
494     if (!xi)
495         return FALSE;
496
497     if (mask) {
498         xm = XGetImage(RrDisplay(inst), mask,
499                        0, 0, mw, mh, 0xffffffff, ZPixmap);
500         if (!xm) {
501             XDestroyImage(xi);
502             return FALSE;
503         }
504         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
505             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
506     }
507
508     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
509         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
510
511     *data = g_new(RrPixel32, pw * ph);
512     RrIncreaseDepth(inst, *data, xi);
513
514     if (mask) {
515         /* apply transparency from the mask */
516         di = 0;
517         for (i = 0, y = 0; y < ph; ++y) {
518             for (x = 0; x < pw; ++x, ++i) {
519                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
520                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
521             }
522             di += xm->bytes_per_line;
523         }
524     }
525
526     *w = pw;
527     *h = ph;
528
529     XDestroyImage(xi);
530     if (mask)
531         XDestroyImage(xm);
532
533     return TRUE;
534 }