What kind of shader for 2D games (ie. Super Mario)

Question

I've been trying to figure out how to use OpenGL ES 2.0 for 2D. So far I think I have a handle on most things. But the one thing that I haven't figured out is what to do for the shaders?

I understand that you set up the camera/view and the lights in the shader, but I don't want shadows or any kind of sign of lighting. Basically I just want to move sprites around the screen and have the sprites look exactly like they did when I drew them in photoshop.

Anyone have an example of a shader that would do this? Or maybe an article that talks about this?

I already find that there's a lot of 3d overhead in OpenGL when trying to make a purely 2D program, but apparently it's the only viable option on Android.

Answer 1

I made a 2D videogame and these are the shaders I used. Two very simple shaders. Is this what you asking for?

**VERTEX_SHADER_2D =**    
   attribute vec4 position;
   attribute vec2 textureCoordIn;
   varying vec2 vTextureCoordOut;

   uniform mediump mat4 modelViewMatrix;

   void main()
      {
          gl_Position = modelViewMatrix * position;
          vTextureCoordOut = textureCoordIn;
      }


**FRAGMENT_SHADER_2D =** 
      varying mediump vec2 vTextureCoordOut;

      uniform sampler2D sampler;

      void main()
      {
          gl_FragColor = texture2D(sampler, vTextureCoordOut);
      }