Multithreaded image loading

testApp.cpp

#include "testApp.h"

static CGLContextObj ctx;
static CGLPixelFormatObj pixStuff;

class MyThread : public ofThread
{
public:

	ofImage image;

	void threadedFunction()
	{
		printf("start\n");
		
		CGLContextObj newCtx;
		CGLCreateContext(pixStuff, ctx, &newCtx);
		CGLLockContext(newCtx);
		CGLSetCurrentContext(newCtx);
		CGLEnable(newCtx, kCGLCEMPEngine);

		image.loadImage("http://forum.openframeworks.cc/Themes/ofw-theme/images/site/banner.gif");

		CGLDisable(newCtx, kCGLCEMPEngine);
		CGLUnlockContext(newCtx);
		CGLDestroyContext(newCtx);
		
		printf("stop\n");
	}
};

MyThread thread;

//--------------------------------------------------------------
void testApp::setup()
{
	ofSetFrameRate(60);
	ofSetVerticalSync(true);
	
	ctx = CGLGetCurrentContext();
	pixStuff = CGLGetPixelFormat(ctx);

	thread.startThread(true, false);
}

//--------------------------------------------------------------
void testApp::draw()
{
	ofDrawBitmapString(ofToString(ofGetFrameRate(), 2), 10, 20);
	
	thread.image.draw(0, 30);
}

//--------------------------------------------------------------
void testApp::keyPressed(int key)
{

}

//--------------------------------------------------------------
void testApp::keyReleased(int key)
{

}

//--------------------------------------------------------------
void testApp::mouseMoved(int x, int y)
{

}

//--------------------------------------------------------------
void testApp::mouseDragged(int x, int y, int button)
{

}

//--------------------------------------------------------------
void testApp::mousePressed(int x, int y, int button)
{

}

//--------------------------------------------------------------
void testApp::mouseReleased(int x, int y, int button)
{

}

//--------------------------------------------------------------
void testApp::windowResized(int w, int h)
{

}

//--------------------------------------------------------------
void testApp::gotMessage(ofMessage msg)
{

}

//--------------------------------------------------------------
void testApp::dragEvent(ofDragInfo dragInfo)
{

}