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bind the composite pixmap to the glpixmap only when the pixmaps are destroyed/recreat...
[dana/openbox.git] / loco / loco.c
1 /* -*- indent-tabs-mode: nil; tab-width: 4; c-basic-offset: 4; -*-
2
3    loco.c for the Openbox window manager
4    Copyright (c) 2008        Derek Foreman
5    Copyright (c) 2008        Dana Jansens
6
7    This program is free software; you can redistribute it and/or modify
8    it under the terms of the GNU General Public License as published by
9    the Free Software Foundation; either version 2 of the License, or
10    (at your option) any later version.
11
12    This program is distributed in the hope that it will be useful,
13    but WITHOUT ANY WARRANTY; without even the implied warranty of
14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15    GNU General Public License for more details.
16
17    See the COPYING file for a copy of the GNU General Public License.
18 */
19
20 #include <stdio.h>
21 #include "obt/mainloop.h"
22 #include "obt/display.h"
23 #include "obt/mainloop.h"
24 #include "obt/prop.h"
25 #include <glib.h>
26 #include <GL/glx.h>
27 #include <GL/glext.h>
28 #include <GL/glxext.h>
29 #include <GL/glxtokens.h>
30 /*
31 <dana> you want CreateNotify, DestroyNotify, MapNotify, UnmapNotify, and
32           ConfigureNotify
33           <dana> and then xdamage or whatever
34
35 */
36
37 #define glError()                                      \
38 {                                                      \
39     /*const GLchar *err_file = strrchr(err_path, '/');*/ \
40     GLenum        gl_error = glGetError();             \
41                                                        \
42     /*++err_file;*/                                        \
43                                                        \
44     for (; (gl_error); gl_error = glGetError())        \
45       fprintf(stderr, "%s: %d caught at line %u\n",    \
46               __FUNCTION__, gl_error, __LINE__);       \
47               /*(const GLchar*)gluErrorString(gl_error)*/ \
48 }
49
50
51 #define MAX_DEPTH 32
52
53 typedef struct {
54     Window id;
55     gint x, y, w, h;
56     gint depth;
57     gboolean input_only;
58     gboolean visible;
59     gint type; /* XXX make this an enum */
60     GLuint texname;
61     GLXPixmap glpixmap;
62 } LocoWindow;
63
64 typedef struct _LocoList {
65     struct _LocoList *next;
66     struct _LocoList *prev;
67     LocoWindow *window;
68 } LocoList;
69
70 static Window      loco_root;
71 static Window      loco_overlay;
72 /* Maps X Window ID -> LocoWindow* */
73 static GHashTable *window_map;
74 /* Maps X Window ID -> LocoList* which is in the stacking_top/bottom list */
75 static GHashTable *stacking_map;
76 /* From top to bottom */
77 static LocoList   *stacking_top;
78 static LocoList   *stacking_bottom;
79 static VisualID visualIDs[MAX_DEPTH + 1];
80 static XVisualInfo *glxPixmapVisuals[MAX_DEPTH + 1];
81 static int loco_screen_num;
82
83 void (*BindTexImageEXT)(Display *, GLXDrawable, int, const int *);
84 void (*ReleaseTexImageEXT)(Display *, GLXDrawable, int);
85
86 /*
87 static void print_stacking()
88 {
89     LocoList *it;
90
91     for (it = stacking_top; it; it = it->next) {
92         printf("0x%lx\n", it->window->id);
93     }
94 }
95 */
96
97 int create_glxpixmap(LocoWindow *lw)
98 {
99     XVisualInfo  *visinfo;
100     Pixmap pixmap;
101     static const int attrs[] =
102         {
103             GLX_TEXTURE_FORMAT_EXT, GLX_TEXTURE_FORMAT_RGBA_EXT,
104             None
105         };
106
107     static const int drawable_tfp_attrs[] =
108         {
109             GLX_CONFIG_CAVEAT, GLX_NONE,
110             GLX_DOUBLEBUFFER, False,
111             GLX_DEPTH_SIZE, 0,
112             GLX_RED_SIZE, 1,
113             GLX_GREEN_SIZE, 1,
114             GLX_BLUE_SIZE, 1,
115             GLX_ALPHA_SIZE, 1,
116             GLX_RENDER_TYPE, GLX_RGBA_BIT,
117             GLX_BIND_TO_TEXTURE_RGBA_EXT, True, // additional for tfp
118             None
119         };
120     int count;
121
122     pixmap = XCompositeNameWindowPixmap(obt_display, lw->id);
123     visinfo = glxPixmapVisuals[lw->depth];
124     if (!visinfo) {
125         printf("no visinfo for depth %d\n", lw->depth);
126         return 0;
127     }
128
129     GLXFBConfig fbc;
130     GLXFBConfig *fbconfigs = glXChooseFBConfig(obt_display,
131                                                loco_screen_num,
132                                                drawable_tfp_attrs, &count);
133
134     int i;
135     fbc = 0;
136     for(i = 0; i < count; ++i ) {
137         int value;
138         glXGetFBConfigAttrib(obt_display,
139                              fbconfigs[i], GLX_VISUAL_ID, &value);
140         if(value == (int)visinfo->visualid)
141         {
142             fbc = fbconfigs[i];
143             XFree(fbconfigs);
144         }
145     }
146
147     if (!fbc) {
148         printf("fbconfigless\n");
149         return 0;
150     }
151
152     lw->glpixmap = glXCreatePixmap(obt_display, fbc, pixmap, attrs);
153     return !!lw->glpixmap;
154 }
155
156 int bindPixmapToTexture(LocoWindow *lw)
157 {
158     if (lw->glpixmap != None)
159         return 1; /* already bound */
160
161     if (!create_glxpixmap(lw))
162         return 0; /* horrible failure */
163
164 /*
165     if (screen->queryDrawable (screen->display->display,
166                                texture->pixmap,
167                                GLX_TEXTURE_TARGET_EXT,
168                                &target))
169     {
170         fprintf (stderr, "%s: glXQueryDrawable failed\n", programName);
171
172         glXDestroyGLXPixmap (screen->display->display, texture->pixmap);
173         texture->pixmap = None;
174
175         return FALSE;
176     }
177 */
178
179     glBindTexture(GL_TEXTURE_2D, lw->texname);
180 glError();
181     BindTexImageEXT(obt_display, lw->glpixmap, GLX_FRONT_LEFT_EXT, NULL);
182
183     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_NEAREST);
184     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_NEAREST);
185
186     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
187     glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
188     glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
189     return 1;
190 }
191
192 void releasePixmapFromTexture(LocoWindow *lw)
193 {
194     if (lw->glpixmap) {
195         glBindTexture(GL_TEXTURE_2D, lw->texname);
196
197         ReleaseTexImageEXT(obt_display, lw->glpixmap, GLX_FRONT_LEFT_EXT);
198
199         glBindTexture(GL_TEXTURE_2D, 0);
200     }
201 }
202
203 void destroy_glxpixmap(LocoWindow *lw)
204 {
205     if (lw->glpixmap) {
206         releasePixmapFromTexture(lw);
207
208         glXDestroyGLXPixmap(obt_display, lw->glpixmap);
209         lw->glpixmap = None;
210     }
211 }
212
213 static void full_composite(void)
214 {
215     int ret;
216     LocoList *it;
217
218     glClear(GL_COLOR_BUFFER_BIT);
219     for (it = stacking_bottom; it != stacking_top; it = it->prev) {
220         if (it->window->input_only) continue;
221         if (!it->window->visible)   continue;
222
223         glBindTexture(GL_TEXTURE_2D, it->window->texname);
224         ret = bindPixmapToTexture(it->window);
225         glBegin(GL_QUADS);
226         glColor3f(1.0, 1.0, 1.0);
227         glVertex2i(it->window->x, it->window->y);
228         glTexCoord2f(1, 0);
229         glVertex2i(it->window->x + it->window->w, it->window->y);
230         glTexCoord2f(1, 1);
231         glVertex2i(it->window->x + it->window->w, it->window->y + it->window->h);
232         glTexCoord2f(0, 1);
233         glVertex2i(it->window->x, it->window->y + it->window->h);
234         glTexCoord2f(0, 0);
235         glEnd();
236     }
237     glXSwapBuffers(obt_display, loco_overlay);
238 }
239
240 static LocoList* loco_list_prepend(LocoList **top, LocoList **bottom,
241                                    LocoWindow *window)
242 {
243     LocoList *n = g_new(LocoList, 1);
244     n->window = window;
245
246     n->prev = NULL;
247     n->next = *top;
248     if (n->next) n->next->prev = n;
249
250     *top = n;
251     if (!*bottom) *bottom = n;
252     return n;
253 }
254
255 static void loco_list_delete_link(LocoList **top, LocoList **bottom,
256                                   LocoList *pos)
257 {
258     LocoList *prev = pos->prev;
259     LocoList *next = pos->next;
260
261     if (next)
262         next->prev = prev;
263     if (prev)
264         prev->next = next;
265     if (!next)
266         *bottom = prev;
267     if (!prev)
268         *top = next;
269
270     g_free(pos);
271 }
272
273 static void loco_list_move_before(LocoList **top, LocoList **bottom,
274                                   LocoList *move, LocoList *before)
275 {
276     LocoList *prev, *next;
277
278     /* these won't move it anywhere */
279     if (move == before || move->next == before) return;
280
281     prev = move->prev;
282     next = move->next;
283
284     /* remove it from the list */
285     if (next) next->prev = prev;
286     else      *bottom = prev;
287     if (prev) prev->next = next;
288     else      *top = next;
289
290     /* reinsert it */
291     if (before) {
292         move->next = before;
293         move->prev = before->prev;
294         move->next->prev = move;
295         if (move->prev) move->prev->next = move;
296     }
297     else {
298         /* after the bottom */
299         move->prev = *bottom;
300         move->next = NULL;
301         if (move->prev) move->prev->next = move;
302         *bottom = move;
303     }
304
305     if (!move->prev) *top = move;
306 }
307
308 /* Returns a LocoWindow structure */
309 static LocoWindow* find_window(Window window)
310 {
311     return g_hash_table_lookup(window_map, &window);
312 }
313
314 /* Returns a node from the stacking_top/bottom list */
315 static LocoList* find_stacking(Window window)
316 {
317     return g_hash_table_lookup(stacking_map, &window);
318 }
319
320 void composite_setup_window(LocoWindow *win)
321 {
322     /*something useful = */XDamageCreate(obt_display, win->id, XDamageReportRawRectangles);
323 }
324
325 static void add_window(Window window)
326 {
327     LocoWindow *lw;
328     LocoList *it;
329     XWindowAttributes attrib;
330
331     printf("add window 0x%lx\n", window);
332
333     if (!XGetWindowAttributes(obt_display, window, &attrib))
334         return;
335
336     lw = g_new0(LocoWindow, 1);
337     lw->id = window;
338     lw->input_only = attrib.class == InputOnly;
339     lw->x = attrib.x;
340     lw->y = attrib.y;
341     lw->w = attrib.width;
342     lw->h = attrib.height;
343     lw->depth = attrib.depth;
344     lw->visible = attrib.map_state != IsUnmapped;
345
346     g_hash_table_insert(window_map, &lw->id, lw);
347     /* new windows are at the top */
348     it = loco_list_prepend(&stacking_top, &stacking_bottom, lw);
349     g_hash_table_insert(stacking_map, &lw->id, it);
350
351     if (!lw->input_only) {
352         glGenTextures(1, &lw->texname);
353         //  glTexImage2D(TARGET, 0, GL_RGB, lw->w, lw->h, 0, GL_BGRA, GL_UNSIGNED_BYTE, NULL);
354         composite_setup_window(lw);
355     }
356
357     //print_stacking();
358 }
359
360 static void remove_window(LocoWindow *lw)
361 {
362     printf("remove window 0x%lx\n", lw->id);
363
364     LocoList *pos = find_stacking(lw->id);
365     g_assert(pos);
366
367     glDeleteTextures(1, &lw->texname);
368
369     loco_list_delete_link(&stacking_top, &stacking_bottom, pos);
370     g_hash_table_remove(stacking_map, &lw->id);
371     g_hash_table_remove(window_map, &lw->id);
372
373     g_free(lw);
374
375     //print_stacking();
376 }
377
378 static void show_window(LocoWindow *lw)
379 {
380     guint32 *type;
381     guint i, ntype;
382
383     lw->visible = TRUE;
384
385     /* get the window's semantic type (for different effects!) */
386     lw->type = 0; /* XXX set this to the default type */
387     if (OBT_PROP_GETA32(lw->id, NET_WM_WINDOW_TYPE, ATOM, &type, &ntype)) {
388         /* use the first value that we know about in the array */
389         for (i = 0; i < ntype; ++i) {
390             /* XXX SET THESE TO AN ENUM'S VALUES */
391             if (type[i] == OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_DESKTOP))
392                 lw->type = 1;
393             if (type[i] == OBT_PROP_ATOM(NET_WM_WINDOW_TYPE_MENU))
394                 lw->type = 2;
395             /* XXX there are more TYPES that need to be added to prop.h */
396         }
397         g_free(type);
398     }
399
400 }
401
402 static void hide_window(LocoWindow *lw, gboolean destroyed)
403 {
404     /* if destroyed, then the window is no longer available */
405     lw->visible = FALSE;
406     destroy_glxpixmap(lw);
407 }
408
409 void COMPOSTER_RAWR(const XEvent *e, gpointer data)
410 {
411     int redraw_required = 0;
412
413     //g_print("COMPOSTER_RAWR() %d\n", e->type);
414
415     if (e->type == ConfigureNotify) {
416         LocoWindow *lw;
417 redraw_required = 1;
418         printf("Window 0x%lx moved or something\n", e->xconfigure.window);
419
420         lw = find_window(e->xconfigure.window);
421         if (lw) {
422             LocoList *above, *pos;
423
424             pos = find_stacking(e->xconfigure.window);
425             above = find_stacking(e->xconfigure.above);
426
427             g_assert(pos != NULL && pos->window != NULL);
428             if (e->xconfigure.above && !above)
429                 printf("missing windows from the stacking list!!\n");
430
431             lw->x = e->xconfigure.x;
432             lw->y = e->xconfigure.y;
433             if ((lw->w != e->xconfigure.width) ||
434                 (lw->h != e->xconfigure.height))
435             {
436                 lw->w = e->xconfigure.width;
437                 lw->h = e->xconfigure.height;
438
439                 destroy_glxpixmap(lw);
440             }
441             printf("Window 0x%lx above 0x%lx\n", pos->window->id,
442                    above ? above->window->id : 0);
443             loco_list_move_before(&stacking_top, &stacking_bottom, pos, above);
444         }
445         //print_stacking();
446     }
447     else if (e->type == CreateNotify) {
448         add_window(e->xmap.window);
449     }
450     else if (e->type == DestroyNotify) {
451         LocoWindow *lw = find_window(e->xdestroywindow.window);
452         if (lw) {
453             hide_window(lw, TRUE);
454             if (lw->glpixmap != None) {
455                 destroy_glxpixmap(lw);
456             }
457             remove_window(lw);
458         }
459         else
460             printf("destroy notify for unknown window 0x%lx\n",
461                    e->xdestroywindow.window);
462     }
463     else if (e->type == ReparentNotify) {
464         if (e->xreparent.parent == loco_root)
465             add_window(e->xreparent.window);
466         else {
467             LocoWindow *lw = find_window(e->xreparent.window);
468             if (lw) {
469                 printf("window 0x%lx reparented from root\n", lw->id);
470                 hide_window(lw, FALSE);
471                 remove_window(lw);
472             }
473             else
474                 printf("reparent notify away from root for unknown window "
475                        "0x%lx\n", e->xreparent.window);
476         }
477     }
478
479     else if (e->type == MapNotify) {
480         LocoWindow *lw = find_window(e->xmap.window);
481         if (lw)
482             show_window(lw);
483         else
484             printf("map notify for unknown window 0x%lx\n",
485                    e->xmap.window);
486     }
487     else if (e->type == UnmapNotify) {
488         LocoWindow *lw = find_window(e->xunmap.window);
489         if (lw)
490             hide_window(lw, FALSE);
491         else
492             printf("unmap notify for unknown window 0x%lx\n",
493                    e->xunmap.window);
494     }
495     else if (e->type == obt_display_extension_damage_basep + XDamageNotify) {
496 //        LocoWindow *lw = find_window(e->xdamage.window);
497   //      if (lw->visible)
498             redraw_required = 1;
499     }
500     if (redraw_required && !XPending(obt_display))
501         full_composite();
502 }
503
504 static void find_all_windows(gint screen)
505 {
506     guint i, nchild;
507     Window w, *children;
508
509     if (!XQueryTree(obt_display, loco_root, &w, &w, &children, &nchild))
510         nchild = 0;
511
512     for (i = 0; i < nchild; ++i)
513         if (children[i] != None) add_window(children[i]);
514
515     if (children) XFree(children);
516 }
517
518 static guint window_hash(Window *w) { return *w; }
519 static gboolean window_comp(Window *w1, Window *w2) { return *w1 == *w2; }
520
521 void loco_set_mainloop(gint screen_num, ObtMainLoop *loop)
522 {
523     int db, stencil, depth;
524     int i, j, value, count;
525     int w, h;
526     XVisualInfo *vi, tvis, *visinfo;
527     GLXContext cont;
528     int config[] =
529         { GLX_DEPTH_SIZE, 1, GLX_DOUBLEBUFFER, GLX_RGBA, None };
530
531     loco_screen_num = screen_num;
532     loco_root = obt_root(screen_num);
533     loco_overlay = XCompositeGetOverlayWindow(obt_display, loco_root);
534 XserverRegion region = XFixesCreateRegion(obt_display, NULL, 0);
535
536     XFixesSetWindowShapeRegion (obt_display,
537                                 loco_overlay,
538                                 ShapeBounding,
539                                 0, 0,
540                                 0);
541     XFixesSetWindowShapeRegion (obt_display,
542                                 loco_overlay,
543                                 ShapeInput,
544                                 0, 0,
545                                 region);
546
547     XFixesDestroyRegion (obt_display, region);
548
549     vi = glXChooseVisual(obt_display, screen_num, config);
550     cont = glXCreateContext(obt_display, vi, NULL, GL_TRUE);
551     if (cont == NULL)
552         printf("context creation failed\n");
553     glXMakeCurrent(obt_display, loco_overlay, cont);
554
555     BindTexImageEXT =
556         glXGetProcAddress((const guchar*)"glXBindTexImageEXT");
557     ReleaseTexImageEXT =
558         glXGetProcAddress((const guchar*)"glXReleaseTexImageEXT");
559
560     w = WidthOfScreen(ScreenOfDisplay(obt_display, screen_num));
561     h = HeightOfScreen(ScreenOfDisplay(obt_display, screen_num));
562     glViewport(0, 0, w, h);
563     glMatrixMode(GL_PROJECTION);
564     glLoadIdentity();
565 printf("Setting up an orthographic projection of %dx%d\n", w, h);
566     glOrtho(0, w, h, 0.0, -1.0, 100.0);
567     glMatrixMode(GL_MODELVIEW);
568     glLoadIdentity();
569     glClear(GL_COLOR_BUFFER_BIT);
570     glEnable(GL_TEXTURE_2D);
571 glError();
572     glXSwapBuffers(obt_display, loco_overlay);
573     glClearColor(1.0, 0.0, 0.0, 1.0);
574 //    glBlendFunc(GL_ONE_MINUS_SRC_ALPHA, GL_SRC_ALPHA);
575 //    glEnable(GL_BLEND);
576     db = 32767;
577     stencil = 32767;
578     depth = 32767;
579     for (i = 0; i <= MAX_DEPTH; i++) {
580         tvis.depth = i;
581         visualIDs[i] = 0;
582         visinfo = XGetVisualInfo(obt_display, VisualDepthMask, &tvis, &count);
583         for (j = 0; j < count; j++) {
584             glXGetConfig(obt_display, &visinfo[j], GLX_USE_GL, &value);
585             if (!value)
586                 continue;
587
588             glXGetConfig(obt_display, &visinfo[j], GLX_DOUBLEBUFFER, &value);
589             if (value > db)
590                 continue;
591             db = value;
592
593             glXGetConfig(obt_display, &visinfo[j], GLX_STENCIL_SIZE, &value);
594             if (value > stencil)
595                 continue;
596             stencil = value;
597
598             glXGetConfig(obt_display, &visinfo[j], GLX_DEPTH_SIZE, &value);
599             if (value > depth)
600                 continue;
601             depth = value;
602
603             visualIDs[i] = visinfo[j].visualid;
604         }
605     }
606
607     for (i = 0 ;i <= MAX_DEPTH; i++) {
608         tvis.visualid = visualIDs[i];
609         glxPixmapVisuals[i] = XGetVisualInfo(obt_display, VisualIDMask, &tvis, &count);
610         if (glxPixmapVisuals[i])
611             printf("supporting depth %d\n", i);
612     }
613     obt_main_loop_x_add(loop, COMPOSTER_RAWR, NULL, NULL);
614     window_map = g_hash_table_new((GHashFunc)window_hash,
615                                   (GEqualFunc)window_comp);
616     stacking_map = g_hash_table_new((GHashFunc)window_hash,
617                                     (GEqualFunc)window_comp);
618     stacking_top = stacking_bottom = NULL;
619
620     XCompositeRedirectSubwindows(obt_display, loco_root, CompositeRedirectManual);
621     find_all_windows(screen_num);
622 }
623
624 void loco_shutdown(void)
625 {
626 }