main.cpp

#include "ofMain.h"
#include "ofApp.h"

int main(){
	ofSetupOpenGL(1024,768, OF_WINDOW);			// <-------- setup the GL context

	// this kicks off the running of my app
	// can be OF_WINDOW or OF_FULLSCREEN
	// pass in width and height too:
	ofRunApp( new ofApp() );
	return 0;
}


#ifdef TARGET_ANDROID
#include <jni.h>

//========================================================================
extern "C"{
	void Java_cc_openframeworks_OFAndroid_init( JNIEnv*  env, jobject  thiz ){
		main();
	}
}
#endif

ofapp.cpp

#include "ofApp.h"

//--------------------------------------------------------------
void ofApp::setup() {
	ofBackground(255, 255, 255);
	ofSetLogLevel (OF_LOG_VERBOSE);

	screenWidth = ofGetScreenWidth();
	screenHeight = ofGetScreenHeight();

	// this makes the camera directly return grayscale image, faster!
	grabber.setPixelFormat(OF_PIXELS_MONO);
	grabber.initGrabber(screenWidth, screenHeight);

	//gray.allocate(grabber.getWidth(),grabber.getHeight());
	bg.allocate(grabber.getWidth(), grabber.getHeight());
	//diff.allocate(grabber.getWidth(),grabber.getHeight());
	one_second_time = ofGetSystemTime();
	camera_fps = 0;
	frames_one_sec = 0;
	captureBg = false;
	captureBgCount = 3;

	circleRadius = 3;
}

//--------------------------------------------------------------
void ofApp::update() {
	grabber.update();
	if (grabber.isFrameNew()) {
		frames_one_sec++;
		if (ofGetSystemTime() - one_second_time >= 1000) {
			camera_fps = frames_one_sec;
			frames_one_sec = 0;
			one_second_time = ofGetSystemTime();
		}
		//gray.setFromPixels(grabber.getPixels(),grabber.getWidth(),grabber.getHeight());

		if (captureBg) {
			if (captureBgCount == 3) {
				captureBgCount = 0;
				bg = gray;
				captureBg = true;
				gray.absDiff(bg);
			} else {
				captureBgCount++;
			}

		}

		//gray.threshold(70);
	}
}

//--------------------------------------------------------------
void ofApp::draw() {
	ofSetHexColor(0xFFFFFF);
	//gray.draw(0,0);

	grabber.getTextureReference().drawSubsection(0, 0, screenWidth, screenHeight, 0, 0);

//	int x = (screenWidth/2) + circleRadius;
//	int y = circleRadius;

//	while (x + circleRadius < screenWidth) {
//		while (y + circleRadius < screenHeight) {
//			ofColor c = grabber.getPixelsRef().getColor(x-(screenWidth/2), y);
//			ofSetColor(c);
//			ofCircle(x, y, circleRadius);
//			y += circleRadius;
//		}
//		x += circleRadius;
//	}


	ofColor c2 = grabber.getPixelsRef().getColor(600,600);
	ofSetColor(c2);

	ofCircle(30,30,30);

//	ofSetColor(0x000000);
//	ofDrawBitmapString("screenWidth: " + screenWidth, 700, 700);
//	ofDrawBitmapString("screenHeight: " + screenHeight, 700 , 720);
}

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

}

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

}

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

}

//--------------------------------------------------------------
void ofApp::touchDown(int x, int y, int id) {

}

//--------------------------------------------------------------
void ofApp::touchMoved(int x, int y, int id) {

}

//--------------------------------------------------------------
void ofApp::touchUp(int x, int y, int id) {

}

//--------------------------------------------------------------
void ofApp::touchDoubleTap(int x, int y, int id) {

}

//--------------------------------------------------------------
void ofApp::touchCancelled(int x, int y, int id) {

}

//--------------------------------------------------------------
void ofApp::swipe(ofxAndroidSwipeDir swipeDir, int id) {

}

//--------------------------------------------------------------
void ofApp::pause() {

}

//--------------------------------------------------------------
void ofApp::stop() {

}

//--------------------------------------------------------------
void ofApp::resume() {

}

//--------------------------------------------------------------
void ofApp::reloadTextures() {

}

//--------------------------------------------------------------
bool ofApp::backPressed() {
	return false;
}

//--------------------------------------------------------------
void ofApp::okPressed() {

}

//--------------------------------------------------------------
void ofApp::cancelPressed() {

}

ofapp.h

#pragma once

#include "ofMain.h"
#include "ofxAndroid.h"

#include "ofxOpenCv.h"

class ofApp : public ofxAndroidApp{
	
	public:
		
		void setup();
		void update();
		void draw();

		void keyPressed(int key);
		void keyReleased(int key);
		void windowResized(int w, int h);

		void touchDown(int x, int y, int id);
		void touchMoved(int x, int y, int id);
		void touchUp(int x, int y, int id);
		void touchDoubleTap(int x, int y, int id);
		void touchCancelled(int x, int y, int id);
		void swipe(ofxAndroidSwipeDir swipeDir, int id);

		void pause();
		void stop();
		void resume();
		void reloadTextures();

		bool backPressed();
		void okPressed();
		void cancelPressed();

		ofVideoGrabber grabber;
		ofxCvGrayscaleImage gray, bg;//, diff;

		bool captureBg;

		int one_second_time;
		int camera_fps;
		int frames_one_sec;
		int captureBgCount;
		int circleRadius;

		int screenWidth;
		int screenHeight;

};