7249d8344177603ccc2f947d8e73e88a3ae51465
[goodguy/history.git] / cinelerra-5.0 / guicast / bcpbuffer.C
1
2 /*
3  * CINELERRA
4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
5  * 
6  * This program is free software; you can redistribute it and/or modify
7  * it under the terms of the GNU General Public License as published by
8  * the Free Software Foundation; either version 2 of the License, or
9  * (at your option) any later version.
10  * 
11  * This program is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
14  * GNU General Public License for more details.
15  * 
16  * You should have received a copy of the GNU General Public License
17  * along with this program; if not, write to the Free Software
18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
19  * 
20  */
21
22 #include "bcpbuffer.h"
23 #include "bcresources.h"
24 #include "bcsignals.h"
25 #include "bcsynchronous.h"
26 #include "bcwindowbase.h"
27
28
29
30
31 BC_PBuffer::BC_PBuffer(int w, int h)
32 {
33         reset();
34         this->w = w;
35         this->h = h;
36         create_pbuffer(w, h);
37 }
38
39 BC_PBuffer::~BC_PBuffer()
40 {
41 #ifdef HAVE_GL
42         BC_WindowBase::get_synchronous()->release_pbuffer(window_id, pbuffer);
43 #endif
44 }
45
46
47 void BC_PBuffer::reset()
48 {
49 #ifdef HAVE_GL
50         pbuffer = 0;
51         window_id = -1;
52 #endif
53 }
54
55 #ifdef HAVE_GL
56
57 GLXPbuffer BC_PBuffer::get_pbuffer()
58 {
59         return pbuffer;
60 }
61 #endif
62
63
64 void BC_PBuffer::create_pbuffer(int w, int h)
65 {
66 #ifdef HAVE_GL
67         int ww = (w + 3) & ~3, hh = (h + 3) & ~3;
68         int pb_attrs[] = {
69                 GLX_PBUFFER_WIDTH, ww,
70                 GLX_PBUFFER_HEIGHT, hh,
71                 GLX_LARGEST_PBUFFER, False,
72                 GLX_PRESERVED_CONTENTS, True,
73                 None
74         };
75
76         BC_WindowBase *current_window = BC_WindowBase::get_synchronous()->current_window;
77         Display *dpy = current_window->get_display();
78         GLXFBConfig *fb_cfgs = current_window->glx_pbuffer_fb_configs();
79         int nfb_cfgs = current_window->n_fbcfgs_pbuffer;
80         XVisualInfo *visinfo = 0;
81
82         for( int i=0; !pbuffer && i<nfb_cfgs; ++i ) {
83                 if( visinfo ) { XFree(visinfo);  visinfo = 0; }
84                 BC_Resources::error = 0;
85                 visinfo = glXGetVisualFromFBConfig(dpy, fb_cfgs[i]);
86                 if( !visinfo || BC_Resources::error ) continue;
87                 pbuffer = glXCreatePbuffer(dpy, fb_cfgs[i], pb_attrs);
88                 if( BC_Resources::error ) pbuffer = 0;
89         }
90
91 // printf("BC_PBuffer::create_pbuffer %d current_config=%d visinfo=%p error=%d pbuffer=%p\n",
92 // __LINE__, current_config, visinfo, BC_Resources::error, pbuffer);
93
94         if( pbuffer ) {
95                 window_id = current_window->get_id();
96                 glx_context = glXCreateContext(dpy, visinfo, current_window->glx_win_context, 1);
97                 BC_WindowBase::get_synchronous()->put_pbuffer(w, h, pbuffer, glx_context);
98         }
99         else
100                 printf("BC_PBuffer::create_pbuffer: failed\n");
101
102         if( visinfo ) XFree(visinfo);
103 #endif
104 }
105
106
107 int bcgl_enable_ret; // debug
108
109 void BC_PBuffer::enable_opengl()
110 {
111 #ifdef HAVE_GL
112         BC_WindowBase *current_window = BC_WindowBase::get_synchronous()->current_window;
113         bcgl_enable_ret = current_window->glx_make_current(pbuffer);
114         BC_WindowBase::get_synchronous()->is_pbuffer = 1;
115 #endif
116 }
117