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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#include "CGLContext.h"
#include "../base/Exception.h"
#include "../base/Logger.h"
#ifdef __APPLE__
#include <ApplicationServices/ApplicationServices.h>
#endif
#include <SDL/SDL.h>
#include <SDL/SDL_syswm.h>
#include <iostream>
namespace avg {
using namespace std;
using namespace boost;
CGLContext::CGLContext(const GLConfig& glConfig, const IntPoint& windowSize,
const SDL_SysWMinfo* pSDLWMInfo)
: GLContext(windowSize, pSDLWMInfo)
{
if (pSDLWMInfo) {
m_Context = CGLGetCurrentContext();
setCurrent();
} else {
CGLPixelFormatObj pixelFormatObj;
GLint numPixelFormats;
CGLPixelFormatAttribute attribs[] = {(CGLPixelFormatAttribute)NULL};
CGLChoosePixelFormat(attribs, &pixelFormatObj, &numPixelFormats);
CGLError err = CGLCreateContext(pixelFormatObj, 0, &m_Context);
if (err) {
cerr << CGLErrorString(err) << endl;
AVG_ASSERT(false);
}
CGLDestroyPixelFormat(pixelFormatObj);
}
init(glConfig, !pSDLWMInfo);
}
CGLContext::~CGLContext()
{
deleteObjects();
if (m_Context && ownsContext()) {
CGLSetCurrentContext(0);
CGLDestroyContext(m_Context);
m_Context = 0;
}
}
void CGLContext::activate()
{
CGLError err = CGLSetCurrentContext(m_Context);
AVG_ASSERT(err == kCGLNoError);
setCurrent();
}
bool CGLContext::initVBlank(int rate)
{
if (rate > 0) {
initMacVBlank(rate);
return true;
} else {
initMacVBlank(0);
return false;
}
}
void CGLContext::initMacVBlank(int rate)
{
CGLContextObj context = CGLGetCurrentContext();
AVG_ASSERT (context);
#if MAC_OS_X_VERSION_10_5
GLint l = rate;
#else
long l = rate;
#endif
if (rate > 1) {
AVG_TRACE(Logger::category::CONFIG, Logger::severity::WARNING,
"VBlank rate set to " << rate
<< " but Mac OS X only supports 1. Assuming 1.");
l = 1;
}
CGLError err = CGLSetParameter(context, kCGLCPSwapInterval, &l);
AVG_ASSERT(!err);
}
}
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