Question

Is it possible to use a pixel shader inside a sprite?

I have create a simple pixel shader, that just writes red color, for testing. I have surrounded my Sprite.DrawImage(tex,...) call by the effect.Begin(...), BeginPass(0), and EndPass(), End(), but my shader seems not to be used : My texture is drawn just normally.

Answer 1

I am not sure what language you are using. I will assume this is an XNA question.

Is it possible to use a pixel shader inside a sprite?

Yes, you can load a shader file (HLSL, up to and including shader model 3 in XNA) and call spritebatch with using it.

If you post sample code it would be easier for us to see if anything isn t setup properly. However, It looks like you have things in the right order. I would check the shader code.

Your application code should look something like this:

Effect effect; 
effect = Content.Load<Effect> ("customeffect"); //load "customeffect.fx"
effect.CurrentTechnique = effect.Techniques["customtechnique"];

effect.Begin();

foreach (EffectPass pass in effect.CurrentTechnique.Passes)
 {
     pass.Begin();

     spriteBatch.Begin(SpriteBlendMode.AlphaBlend, SpriteSortMode.Immediate, SaveStateMode.None);

     spriteBatch.Draw(texture, Vector2.Zero, null, Color.White, 0, new Vector2(20, 20), 1, SpriteEffects.None, 0);

     spriteBatch.End();

     pass.End();
 }

 effect.End();

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