test project for #3598

main.cpp

#include "ofMain.h"


class ofApp : public ofBaseApp{

public:

	ofFbo mFbo;
	ofFbo mFbo1;
	ofFbo mFbo2;


	void setup(){

		// ofDisableArbTex();

		ofSetSphereResolution(3);

		ofFbo::Settings settings;

		settings.numSamples = 4;
		settings.numColorbuffers = 3;
		settings.internalformat = GL_RGBA;
		settings.textureTarget = GL_TEXTURE_2D;
		settings.width = 256;
		settings.height = 256;

		mFbo.allocate(settings);

		settings.numSamples = 0;
		mFbo1.allocate(settings);

		settings.numSamples = 16;
		mFbo2.allocate(settings);
	}

	//--------------------------------------------------------------

	void drawScene(){
		glEnable(GL_MULTISAMPLE);
		ofNoFill();
		ofPushMatrix();
		ofTranslate(128,128,0);
		ofRotate(360 * (ofGetFrameNum() % 720) / 720.);
		ofDrawSphere(100);
		ofPopMatrix();
		ofFill();
		glDisable(GL_MULTISAMPLE);
	}

	void renderFbo(ofFbo& fbo_){
		vector<int> db;
		db.push_back(1);
		db.push_back(2);

		fbo_.begin();

		fbo_.setActiveDrawBuffer(0);
		ofClear(ofColor::black);
		ofSetColor(ofColor::white);
		drawScene();

		fbo_.setActiveDrawBuffers(db);
		ofClear(ofColor::green);
		ofSetColor(ofColor::red);
		drawScene();

		fbo_.setActiveDrawBuffer(2);
		ofClear(ofColor::blue);
		ofSetColor(ofColor::red);
		drawScene();

		fbo_.end();
	}

	//--------------------------------------------------------------
	void draw(){


		renderFbo(mFbo);
		renderFbo(mFbo1);
		renderFbo(mFbo2);

		ofSetColor(ofColor::white);
		mFbo.getTexture(0).draw(20, 20);
		mFbo.getTexture(1).draw(20, 20 + 256);
		mFbo.getTexture(2).draw(20, 20 + 256 + 256);

		mFbo1.getTexture(0).draw(20+256, 20);
		mFbo1.getTexture(1).draw(20+256, 20 + 256);
		mFbo1.getTexture(2).draw(20+256, 20 + 256 + 256);

		mFbo2.getTexture(0).draw(20+256 * 2, 20);
		mFbo2.getTexture(1).draw(20+256 * 2, 20 + 256);
		mFbo2.getTexture(2).draw(20+256 * 2, 20 + 256 + 256);

	}

};

//========================================================================
int main( ){

	ofGLWindowSettings settings;
	settings.position = ofVec2f(1000,500);
	settings.width = 850;
	settings.height = 850;
	settings.setGLVersion(4,2);

	ofCreateWindow(settings);

	// this kicks off the running of my app
	// can be OF_WINDOW or OF_FULLSCREEN
	// pass in width and height too:
	ofRunApp(new ofApp());

}