cinelerra-5.1/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         BC_WindowBase *current_window = BC_WindowBase::get_synchronous()->current_window;
  69         window_id = current_window->get_id();
  70
  71         pbuffer = BC_WindowBase::get_synchronous()->get_pbuffer(ww, hh, &glx_context);
  72         if( pbuffer ) return;
  73
  74         int pb_attrs[] = {
  75                 GLX_PBUFFER_WIDTH, ww,
  76                 GLX_PBUFFER_HEIGHT, hh,
  77                 GLX_LARGEST_PBUFFER, False,
  78                 GLX_PRESERVED_CONTENTS, True,
  79                 None
  80         };
  81
  82         Display *dpy = current_window->get_display();
  83         GLXFBConfig *fb_cfgs = current_window->glx_pbuffer_fb_configs();
  84         int nfb_cfgs = current_window->n_fbcfgs_pbuffer;
  85         XVisualInfo *visinfo = 0;
  86
  87         for( int i=0; !pbuffer && i<nfb_cfgs; ++i ) {
  88                 if( visinfo ) { XFree(visinfo);  visinfo = 0; }
  89                 BC_Resources::error = 0;
  90                 visinfo = glXGetVisualFromFBConfig(dpy, fb_cfgs[i]);
  91                 if( !visinfo || BC_Resources::error ) continue;
  92                 pbuffer = glXCreatePbuffer(dpy, fb_cfgs[i], pb_attrs);
  93                 if( BC_Resources::error ) pbuffer = 0;
  94         }
  95
  96 // printf("BC_PBuffer::create_pbuffer %d current_config=%d visinfo=%p error=%d pbuffer=%p\n",
  97 // __LINE__, current_config, visinfo, BC_Resources::error, pbuffer);
  98
  99         if( pbuffer ) {
 100                 glx_context = glXCreateContext(dpy, visinfo, current_window->glx_win_context, 1);
 101                 BC_WindowBase::get_synchronous()->put_pbuffer(ww, hh, pbuffer, glx_context);
 102         }
 103         else
 104                 printf("BC_PBuffer::create_pbuffer: failed\n");
 105
 106         if( visinfo ) XFree(visinfo);
 107 #endif
 108 }
 109
 110
 111 int bcgl_enable_ret; // debug
 112
 113 void BC_PBuffer::enable_opengl()
 114 {
 115 #ifdef HAVE_GL
 116         BC_WindowBase *current_window = BC_WindowBase::get_synchronous()->current_window;
 117         bcgl_enable_ret = current_window->glx_make_current(pbuffer);
 118         BC_WindowBase::get_synchronous()->is_pbuffer = 1;
 119 #endif
 120 }
 121