void _textureDownload()
{
if( !_texture )
_texture = new util::Texture( GL_TEXTURE_RECTANGLE_ARB,
_channel->getObjectManager().glewGetContext( ));
const PixelViewport& pvp = _channel->getPixelViewport();
_texture->copyFromFrameBuffer( GL_RGBA, pvp );
// Needed as copyFromFrameBuffer only grows the texture!
_texture->resize( pvp.w, pvp.h );
_texture->download( buffer.getData( ));
}
bool _fboDownload()
{
const SystemWindow* sysWindow = _channel->getWindow()->getSystemWindow();
const util::FrameBufferObject* fbo = sysWindow->getFrameBufferObject();
if( !fbo || fbo->getColorTextures().size() != 1 )
return false;
const util::Texture* texture = fbo->getColorTextures().front();
const PixelViewport& pvp = _channel->getPixelViewport();
if( texture->getWidth() != pvp.w || texture->getHeight() != pvp.h )
return false;
texture->download( buffer.getData( ));
return true;
}
int height() { return _channel->getPixelViewport().h; }
int width() { return _channel->getPixelViewport().w; }
float screen_pixel_aspect_ratio()
{
float pixels_per_unit_x = _channel->getPixelViewport().w / (_canvas_width * _channel->getViewport().w);
float pixels_per_unit_y = _channel->getPixelViewport().h / (_canvas_height * _channel->getViewport().h);
return pixels_per_unit_y / pixels_per_unit_x;
}
int screen_height() { return _channel->getPixelViewport().h / _channel->getViewport().h; }
int screen_width() { return _channel->getPixelViewport().w / _channel->getViewport().w; }