[Cinder] Different Image Sizing Snippets

gistfile1.cpp

using namespace ci;

enum Sizing {
  //! Native resolution with no scaling
  Native,
  //! Fit exactly by scaling x/y independently
  Fit,
  //! Resize to fit at least mSize while maintaining aspect ratio
  Aspect,
  //! Resize to fit at most mSize while maintaining aspect ratio
  AspectFit,
  //! Resize to fit at least mSize while maintaining aspect ratio and cropping outside of mSize
  AspectFill
};

// ...

const void drawTexture(const gl::Texture& aTexture, const Rectf& aTargetRect, const Sizing aSizing = Native) {
  switch (aSizing) {
    case AspectFit:
      gl::draw(aTexture, Rectf(aTexture.getBounds()).getCenteredFit(aTargetRect, true));
      break;
      
    case AspectFill:
      gl::draw(aTexture, Area(aTargetRect.getCenteredFit(aTexture.getBounds(), true)), aTargetRect);
      break;
      
    case Aspect:
      gl::draw(aTexture, Area(aTargetRect.getCenteredFit(aTexture.getBounds(), true)));
      break;
      
    case Fit:
      gl::draw(aTexture, aTargetRect);
      break;
      
    default:
    case Native:
      gl::draw(aTexture);
      break;
  }
}