a.png

testApp.cpp

#include "testApp.h"

//--------------------------------------------------------------
void testApp::setup(){
    //画面の基本設定
    ofBackground(0,0,0);
    ofEnableSmoothing();
    myImage.loadImage("test.jpg");
    ofSetColor(255, 255, 255);
    myImage.draw(400, 400, 400, 400);
}

//--------------------------------------------------------------
void testApp::update(){

}

//--------------------------------------------------------------
void testApp::draw()
{
    unsigned char * pixels = myImage.getPixels();
    //画像の幅と高さを所得
    int w = myImage.width;
    int h = myImage.height;
    //画像を3ピクセル間隔でスキャン
    for (int i = 0; i < w; i += 3){
        for (int j = 0; j < h; j += 3){
            int valueR = pixels[j * 3 * w + i * 3];
            int valueG = pixels[j * 3 * w + i * 3 + 1];
            int valueB = pixels[j * 3 * w + i * 3 + 2];
            ofSetColor(valueR, valueG, valueB, 255.0);
            ofCircle(i, j, 1);
        }
    }
}

//--------------------------------------------------------------
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){ 

}