重用渲染目标“溢出油漆”？

发布于 2024-12-13 19:23:01 字数 1265 浏览 0 评论 0原文

我有一些像这样的代码：（

        GraphicsDevice.SetRenderTarget(0, myRenderTarget);
        GraphicsDevice.Clear(Color.Black);
        spriteBatch.Begin(SpriteBlendMode.AlphaBlend, SpriteSortMode.Immediate, SaveStateMode.None);
        myEffect.Begin();
        myEffectCurrentTechnique.Passes[0].Begin();
        spriteBatch.Draw(aRegularTexture, Vector2.Zero, Color.White);
        spriteBatch.End();
        myEffect.CurrentTechnique.Passes[0].End();
        myEffect.End();
        GraphicsDevice.SetRenderTarget(0, backBuffer);
        Texture2D bloomTexture = myRenderTarget.GetTexture();
        ...
        GraphicsDevice.SetRenderTarget(0, myRenderTarget);
        GraphicsDevice.Clear(Color.Black);
        spriteBatch.Begin();
        spriteBatch.Draw(aRegularTexture, Vector2.Zero, Color.White);
        spriteBatch.End();
        GraphicsDevice.SetRenderTarget(0, backBuffer);
        aRegularTexture = myRenderTarget.GetTexture(); 
        //SHOULD be doing nothing, since I'm just rendering said texture into a render target and pulling it back out

注意：这是被修剪到最小的再现代码，而不是我实际使用的）

如果我在第二个代码块之前将 aRegularTexture 渲染到屏幕上，它看起来很好并且没有受到影响。但是，如果我在第二个代码块之后渲染它，它就会被设置为 aModifiedTexture 的内容，即使我从未做过任何会导致这种情况的事情。为什么？（使用XNA 3.1）

原文

I have some code that goes like this:

        GraphicsDevice.SetRenderTarget(0, myRenderTarget);
        GraphicsDevice.Clear(Color.Black);
        spriteBatch.Begin(SpriteBlendMode.AlphaBlend, SpriteSortMode.Immediate, SaveStateMode.None);
        myEffect.Begin();
        myEffectCurrentTechnique.Passes[0].Begin();
        spriteBatch.Draw(aRegularTexture, Vector2.Zero, Color.White);
        spriteBatch.End();
        myEffect.CurrentTechnique.Passes[0].End();
        myEffect.End();
        GraphicsDevice.SetRenderTarget(0, backBuffer);
        Texture2D bloomTexture = myRenderTarget.GetTexture();
        ...
        GraphicsDevice.SetRenderTarget(0, myRenderTarget);
        GraphicsDevice.Clear(Color.Black);
        spriteBatch.Begin();
        spriteBatch.Draw(aRegularTexture, Vector2.Zero, Color.White);
        spriteBatch.End();
        GraphicsDevice.SetRenderTarget(0, backBuffer);
        aRegularTexture = myRenderTarget.GetTexture(); 
        //SHOULD be doing nothing, since I'm just rendering said texture into a render target and pulling it back out

(note: this is trimmed down to the minimal reproduction code, not quite what i actually use)

If I render aRegularTexture to the screen before the second block of code, it looks fine and untouched. But if I render it out after the second block of code, it's set to the contents of aModifiedTexture, even though I'm never doing anything that would result in that. Why? (Using XNA 3.1)

分享到QQ

分享到微博