36 lines
908 B
Java
36 lines
908 B
Java
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The Shader class is responsible for writing final pixel color
|
||
|
|
* to the screen (GraphicWrapper), from a Fragment.
|
||
|
|
* Subclass this base class and implement the ::shade() method.
|
||
|
|
* @author cdehais
|
||
|
|
*/
|
||
|
|
|
||
|
|
public abstract class Shader {
|
||
|
|
|
||
|
|
protected GraphicsWrapper screen;
|
||
|
|
|
||
|
|
public Shader (GraphicsWrapper screen) {
|
||
|
|
this.screen = screen;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Common entry point to ree-initialize the shader
|
||
|
|
*/
|
||
|
|
public void reset () { }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Computes the fragment color and write the result to the screen.
|
||
|
|
*/
|
||
|
|
public abstract void shade (Fragment fragment);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Test whether the fragment falls onto the screen.
|
||
|
|
*/
|
||
|
|
public boolean isClipped (Fragment fragment) {
|
||
|
|
return ((fragment.getX () < 0) || (fragment.getX () >= screen.getWidth ()) ||
|
||
|
|
(fragment.getY () < 0) || (fragment.getY () >= screen.getHeight ()));
|
||
|
|
}
|
||
|
|
}
|