lighten the default shadow, it's alittle harsh right now
[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        Ben 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 <X11/Xlib.h>
22 #include <X11/Xutil.h>
23
24 #include "render.h"
25 #include "gradient.h"
26 #include "font.h"
27 #include "mask.h"
28 #include "color.h"
29 #include "image.h"
30 #include "theme.h"
31
32 #include <glib.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 void RrPaint(RrAppearance *a, Window win, gint w, gint h)
42 {
43     gint i, transferred = 0, sw, sh, partial_w, partial_h;
44     RrPixel32 *source, *dest;
45     Pixmap oldp;
46     RrRect tarea; /* area in which to draw textures */
47     gboolean resized;
48
49     if (w <= 0 || h <= 0) return;
50
51     if (a->surface.parentx < 0 || a->surface.parenty < 0) {
52         /* ob_debug("Invalid parent co-ordinates\n"); */
53         return;
54     }
55     resized = (a->w != w || a->h != h);
56
57     oldp = a->pixmap; /* save to free after changing the visible pixmap */
58     a->pixmap = XCreatePixmap(RrDisplay(a->inst),
59                               RrRootWindow(a->inst),
60                               w, h, RrDepth(a->inst));
61
62     g_assert(a->pixmap != None);
63     a->w = w;
64     a->h = h;
65
66     if (a->xftdraw != NULL)
67         XftDrawDestroy(a->xftdraw);
68     a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap,
69                                RrVisual(a->inst), RrColormap(a->inst));
70     g_assert(a->xftdraw != NULL);
71
72     g_free(a->surface.pixel_data);
73     a->surface.pixel_data = g_new(RrPixel32, w * h);
74
75     if (a->surface.grad == RR_SURFACE_PARENTREL) {
76         g_assert (a->surface.parent);
77         g_assert (a->surface.parent->w);
78
79         sw = a->surface.parent->w;
80         sh = a->surface.parent->h;
81
82         if (a->surface.parentx >= sw || a->surface.parenty >= sh) {
83             return;
84         }
85
86         source = (a->surface.parent->surface.pixel_data +
87                   a->surface.parentx + sw * a->surface.parenty);
88         dest = a->surface.pixel_data;
89
90         if (a->surface.parentx + w > sw) {
91             partial_w = sw - a->surface.parentx;
92         } else partial_w = w;
93
94         if (a->surface.parenty + h > sh) {
95             partial_h = sh - a->surface.parenty;
96         } else partial_h = h;
97
98         for (i = 0; i < partial_h; i++, source += sw, dest += w) {
99             memcpy(dest, source, partial_w * sizeof(RrPixel32));
100         }
101     } else
102         RrRender(a, w, h);
103
104     {
105         gint l, t, r, b;
106         RrMargins(a, &l, &t, &r, &b);
107         RECT_SET(tarea, l, t, w - l - r, h - t - b); 
108     }       
109
110     for (i = 0; i < a->textures; i++) {
111         switch (a->texture[i].type) {
112         case RR_TEXTURE_NONE:
113             break;
114         case RR_TEXTURE_TEXT:
115             if (!transferred) {
116                 transferred = 1;
117                 if ((a->surface.grad != RR_SURFACE_SOLID)
118                     || (a->surface.interlaced))
119                     pixel_data_to_pixmap(a, 0, 0, w, h);
120             }
121             if (a->xftdraw == NULL) {
122                 a->xftdraw = XftDrawCreate(RrDisplay(a->inst), a->pixmap, 
123                                            RrVisual(a->inst),
124                                            RrColormap(a->inst));
125             }
126             RrFontDraw(a->xftdraw, &a->texture[i].data.text, &tarea);
127             break;
128         case RR_TEXTURE_LINE_ART:
129             if (!transferred) {
130                 transferred = 1;
131                 if ((a->surface.grad != RR_SURFACE_SOLID)
132                     || (a->surface.interlaced))
133                     pixel_data_to_pixmap(a, 0, 0, w, h);
134             }
135             XDrawLine(RrDisplay(a->inst), a->pixmap,
136                       RrColorGC(a->texture[i].data.lineart.color),
137                       a->texture[i].data.lineart.x1,
138                       a->texture[i].data.lineart.y1,
139                       a->texture[i].data.lineart.x2,
140                       a->texture[i].data.lineart.y2);
141             break;
142         case RR_TEXTURE_MASK:
143             if (!transferred) {
144                 transferred = 1;
145                 if ((a->surface.grad != RR_SURFACE_SOLID)
146                     || (a->surface.interlaced))
147                     pixel_data_to_pixmap(a, 0, 0, w, h);
148             }
149             RrPixmapMaskDraw(a->pixmap, &a->texture[i].data.mask, &tarea);
150             break;
151         case RR_TEXTURE_RGBA:
152             g_assert(!transferred);
153             RrImageDraw(a->surface.pixel_data,
154                         &a->texture[i].data.rgba,
155                         a->w, a->h,
156                         &tarea);
157         break;
158         }
159     }
160
161     if (!transferred) {
162         transferred = 1;
163         if ((a->surface.grad != RR_SURFACE_SOLID) || (a->surface.interlaced))
164             pixel_data_to_pixmap(a, 0, 0, w, h);
165     }
166
167     XSetWindowBackgroundPixmap(RrDisplay(a->inst), win, a->pixmap);
168     XClearWindow(RrDisplay(a->inst), win);
169     if (oldp) XFreePixmap(RrDisplay(a->inst), oldp);
170 }
171
172 RrAppearance *RrAppearanceNew(const RrInstance *inst, gint numtex)
173 {
174   RrAppearance *out;
175
176   out = g_new0(RrAppearance, 1);
177   out->inst = inst;
178   out->textures = numtex;
179   if (numtex) out->texture = g_new0(RrTexture, numtex);
180
181   return out;
182 }
183
184 RrAppearance *RrAppearanceCopy(RrAppearance *orig)
185 {
186     RrSurface *spo, *spc;
187     RrAppearance *copy = g_new(RrAppearance, 1);
188     gint i;
189
190     copy->inst = orig->inst;
191
192     spo = &(orig->surface);
193     spc = &(copy->surface);
194     spc->grad = spo->grad;
195     spc->relief = spo->relief;
196     spc->bevel = spo->bevel;
197     if (spo->primary != NULL)
198         spc->primary = RrColorNew(copy->inst,
199                                   spo->primary->r,
200                                   spo->primary->g, 
201                                   spo->primary->b);
202     else spc->primary = NULL;
203
204     if (spo->secondary != NULL)
205         spc->secondary = RrColorNew(copy->inst,
206                                     spo->secondary->r,
207                                     spo->secondary->g,
208                                     spo->secondary->b);
209     else spc->secondary = NULL;
210
211     if (spo->border_color != NULL)
212         spc->border_color = RrColorNew(copy->inst,
213                                        spo->border_color->r,
214                                        spo->border_color->g,
215                                        spo->border_color->b);
216     else spc->border_color = NULL;
217
218     if (spo->interlace_color != NULL)
219         spc->interlace_color = RrColorNew(copy->inst,
220                                        spo->interlace_color->r,
221                                        spo->interlace_color->g,
222                                        spo->interlace_color->b);
223     else spc->interlace_color = NULL;
224
225     if (spo->bevel_dark != NULL)
226         spc->bevel_dark = RrColorNew(copy->inst,
227                                      spo->bevel_dark->r,
228                                      spo->bevel_dark->g,
229                                      spo->bevel_dark->b);
230     else spc->bevel_dark = NULL;
231
232     if (spo->bevel_light != NULL)
233         spc->bevel_light = RrColorNew(copy->inst,
234                                       spo->bevel_light->r,
235                                       spo->bevel_light->g,
236                                       spo->bevel_light->b);
237     else spc->bevel_light = NULL;
238
239     spc->interlaced = spo->interlaced;
240     spc->border = spo->border;
241     spc->parent = NULL;
242     spc->parentx = spc->parenty = 0;
243     spc->pixel_data = NULL;
244
245     copy->textures = orig->textures;
246     copy->texture = g_memdup(orig->texture,
247                              orig->textures * sizeof(RrTexture));
248     for (i = 0; i < copy->textures; ++i)
249         if (copy->texture[i].type == RR_TEXTURE_RGBA) {
250             copy->texture[i].data.rgba.cache = NULL;
251         }
252     copy->pixmap = None;
253     copy->xftdraw = NULL;
254     copy->w = copy->h = 0;
255     return copy;
256 }
257
258 void RrAppearanceFree(RrAppearance *a)
259 {
260     gint i;
261
262     if (a) {
263         RrSurface *p;
264         if (a->pixmap != None) XFreePixmap(RrDisplay(a->inst), a->pixmap);
265         if (a->xftdraw != NULL) XftDrawDestroy(a->xftdraw);
266         for (i = 0; i < a->textures; ++i)
267             if (a->texture[i].type == RR_TEXTURE_RGBA) {
268                 g_free(a->texture[i].data.rgba.cache);
269                 a->texture[i].data.rgba.cache = NULL;
270             }
271         if (a->textures)
272             g_free(a->texture);
273         p = &a->surface;
274         RrColorFree(p->primary);
275         RrColorFree(p->secondary);
276         RrColorFree(p->border_color);
277         RrColorFree(p->interlace_color);
278         RrColorFree(p->bevel_dark);
279         RrColorFree(p->bevel_light);
280         g_free(p->pixel_data);
281         p->pixel_data = NULL;
282         g_free(a);
283     }
284 }
285
286
287 static void pixel_data_to_pixmap(RrAppearance *l,
288                                  gint x, gint y, gint w, gint h)
289 {
290     RrPixel32 *in, *scratch;
291     Pixmap out;
292     XImage *im = NULL;
293     im = XCreateImage(RrDisplay(l->inst), RrVisual(l->inst), RrDepth(l->inst),
294                       ZPixmap, 0, NULL, w, h, 32, 0);
295     g_assert(im != NULL);
296
297     in = l->surface.pixel_data;
298     out = l->pixmap;
299
300 /* this malloc is a complete waste of time on normal 32bpp
301    as reduce_depth just sets im->data = data and returns
302 */
303     scratch = g_new(RrPixel32, im->width * im->height);
304     im->data = (gchar*) scratch;
305     RrReduceDepth(l->inst, in, im);
306     XPutImage(RrDisplay(l->inst), out,
307               DefaultGC(RrDisplay(l->inst), RrScreen(l->inst)),
308               im, 0, 0, x, y, w, h);
309     im->data = NULL;
310     XDestroyImage(im);
311     g_free(scratch);
312 }
313
314 void RrMargins (RrAppearance *a, gint *l, gint *t, gint *r, gint *b)
315 {
316     *l = *t = *r = *b = 0;
317
318     if (a->surface.grad != RR_SURFACE_PARENTREL) {
319         if (a->surface.relief != RR_RELIEF_FLAT) {
320             switch (a->surface.bevel) {
321             case RR_BEVEL_1:
322                 *l = *t = *r = *b = 1;
323                 break;
324             case RR_BEVEL_2:
325                 *l = *t = *r = *b = 2;
326                 break;
327             }
328         } else if (a->surface.border) {
329             *l = *t = *r = *b = 1;
330         }
331     }
332 }
333
334 void RrMinsize(RrAppearance *a, gint *w, gint *h)
335 {
336     gint i;
337     RrSize *m;
338     gint l, t, r, b;
339     *w = *h = 0;
340
341     for (i = 0; i < a->textures; ++i) {
342         switch (a->texture[i].type) {
343         case RR_TEXTURE_NONE:
344             break;
345         case RR_TEXTURE_MASK:
346             *w = MAX(*w, a->texture[i].data.mask.mask->width);
347             *h = MAX(*h, a->texture[i].data.mask.mask->height);
348             break;
349         case RR_TEXTURE_TEXT:
350             m = RrFontMeasureString(a->texture[i].data.text.font,
351                                     a->texture[i].data.text.string);
352             *w = MAX(*w, m->width + 4);
353             m->height = RrFontHeight(a->texture[i].data.text.font);
354             *h += MAX(*h, m->height);
355             g_free(m);
356             break;
357         case RR_TEXTURE_RGBA:
358             *w += MAX(*w, a->texture[i].data.rgba.width);
359             *h += MAX(*h, a->texture[i].data.rgba.height);
360             break;
361         case RR_TEXTURE_LINE_ART:
362             *w += MAX(*w, MAX(a->texture[i].data.lineart.x1,
363                               a->texture[i].data.lineart.x2));
364             *h += MAX(*h, MAX(a->texture[i].data.lineart.y1,
365                               a->texture[i].data.lineart.y2));
366             break;
367         }
368     }
369
370     RrMargins(a, &l, &t, &r, &b);
371
372     *w += l + r;
373     *h += t + b;
374
375     if (*w < 1) *w = 1;
376     if (*h < 1) *h = 1;
377 }
378
379 static void reverse_bits(gchar *c, gint n)
380 {
381     gint i;
382     for (i = 0; i < n; i++, c++)
383         *c = (((*c * 0x0802UL & 0x22110UL) |
384                (*c * 0x8020UL & 0x88440UL)) * 0x10101UL) >> 16;
385 }
386
387 gboolean RrPixmapToRGBA(const RrInstance *inst,
388                         Pixmap pmap, Pixmap mask,
389                         gint *w, gint *h, RrPixel32 **data)
390 {
391     Window xr;
392     gint xx, xy;
393     guint pw, ph, mw, mh, xb, xd, i, x, y, di;
394     XImage *xi, *xm = NULL;
395
396     if (!XGetGeometry(RrDisplay(inst), pmap,
397                       &xr, &xx, &xy, &pw, &ph, &xb, &xd))
398         return FALSE;
399
400     if (mask) {
401         if (!XGetGeometry(RrDisplay(inst), mask,
402                           &xr, &xx, &xy, &mw, &mh, &xb, &xd))
403             return FALSE;
404         if (pw != mw || ph != mh || xd != 1)
405             return FALSE;
406     }
407
408     xi = XGetImage(RrDisplay(inst), pmap,
409                    0, 0, pw, ph, 0xffffffff, ZPixmap);
410     if (!xi)
411         return FALSE;
412
413     if (mask) {
414         xm = XGetImage(RrDisplay(inst), mask,
415                        0, 0, mw, mh, 0xffffffff, ZPixmap);
416         if (!xm) {
417             XDestroyImage(xi);
418             return FALSE;
419         }
420         if ((xm->bits_per_pixel == 1) && (xm->bitmap_bit_order != LSBFirst))
421             reverse_bits(xm->data, xm->bytes_per_line * xm->height);
422     }
423
424     if ((xi->bits_per_pixel == 1) && (xi->bitmap_bit_order != LSBFirst))
425         reverse_bits(xi->data, xi->bytes_per_line * xi->height);
426
427     *data = g_new(RrPixel32, pw * ph);
428     RrIncreaseDepth(inst, *data, xi);
429
430     if (mask) {
431         /* apply transparency from the mask */
432         di = 0;
433         for (i = 0, y = 0; y < ph; ++y) {
434             for (x = 0; x < pw; ++x, ++i) {
435                 if (!((((unsigned)xm->data[di + x / 8]) >> (x % 8)) & 0x1))
436                     (*data)[i] &= ~(0xff << RrDefaultAlphaOffset);
437             }
438             di += xm->bytes_per_line;
439         }
440     }
441
442     *w = pw;
443     *h = ph;
444
445     XDestroyImage(xi);
446     if (mask)
447         XDestroyImage(xm);
448
449     return TRUE;
450 }