#include "ofMain.h"

class ofApp : public ofBaseApp
{

	ofFbo fbo_canvas;
	ofFbo fbo_to_artnet;

public:

	void setup()
	{
//		fbo_canvas.allocate(27, 51, GL_RGB); // <-- NG: このサイズだとなんかピクピクしてる...
		fbo_canvas.allocate(28, 50, GL_RGB); // <-- OK: このサイズだとOK!
		fbo_to_artnet.allocate(512/3, 1, GL_RGB);
	}

	void update()
	{
		ofPushStyle();
		{
			// canvasになんか絵をかく
			fbo_canvas.begin();
			ofClear(0);
			ofSetColor(255);
			ofRect(10, 10, 1, 1);
			fbo_canvas.end();


			// fbo_canvasで書いた絵をpixによみこみ
			ofPixels pix;
			fbo_canvas.readToPixels(pix);


			// 最終的にartnetに渡す用に、1列に整列
			fbo_to_artnet.begin();
			for (int y=0; y<pix.getHeight(); y++)
			{
				for (int x=0; x<pix.getWidth(); x++)
				{
					const ofColor &color = pix.getColor(x, y);
					ofSetColor(color);
					ofNoFill();
					ofRect(y*pix.getWidth() + x, 0, 1, 1);
				}
			}
			fbo_to_artnet.end();
		}
		ofPopStyle();
	}

	void draw()
	{
		ofScale(5, 10); // 適当に大きくかく。コメントアウト可

		ofPushStyle();
		{
			ofSetColor(255);
			fbo_canvas.draw(0, 0);
			fbo_to_artnet.draw(0, fbo_canvas.getHeight() + 1);
		}
		ofPopStyle();
	}
};



#pragma mark -
#pragma mark main
int main(){
	ofSetupOpenGL(1600, 900, OF_WINDOW);
	ofRunApp(new ofApp());
}