aspect ratio

getFitAspectRatioSize

 static ofVec2f getFitAspectRatioSize(float maxWidth, float maxHeight, float imgWidth, float imgHeight)
    {
        ofVec2f result;
        float widthRatio = maxWidth / imgWidth;
        float heightRatio = maxHeight / imgHeight;
        float bestRatio = min(widthRatio, heightRatio);
        
        result.x = imgWidth * bestRatio;
        result.y = imgHeight * bestRatio;
        return result;
    }
    
    static ofVec2f getFitAspectRatioSize(ofVec2f windowSize, float imgWidth, float imgHeight)
    {
        return getFitAspectRatioSize(windowSize.x, windowSize.y, imgWidth, imgHeight);
    }
    
    static ofVec2f getFitAspectRatioSize(ofVec2f windowSize, ofImage& image)
    {
        return getFitAspectRatioSize(windowSize, image.getWidth(), image.getHeight());
    }