带有片段着色器的 OpenGL 绘制像素

发布于 2024-11-15 01:15:45 字数 314 浏览 3 评论 0原文

我对 OpenGL 管道感到困惑。我有一个 openGL 方法，我尝试将 glDrawPixels 与片段着色器一起使用，因此我的代码如下所示：

// I setup the shader before this
glUseProgram(myshader);
glDrawPixels(...);

在某些显卡上应用着色器，但在其他显卡上则不然。我对 nvidia 没问题，但对各种 ATI 卡有问题。这是 ATI 卡的错误吗？还是英伟达只是更灵活，而我误解了管道？是否有其他方法可以解决此问题（除了纹理映射之外）？

谢谢，杰夫

原文

I'm confused about the OpenGL pipeline. I have an openGL method where I am trying to use glDrawPixels with a fragment shader, so my code looks like:

// I setup the shader before this
glUseProgram(myshader);
glDrawPixels(...);

On some graphics cards the shader gets applied, but on others it does not. I've no problem with nvidia, but problems with various ATI cards. Is this a bug with the ATI card? Or is nvidia just more flexible and I'm misunderstanding the pipeline? Are there alternatives to working around this (other than texture mapping)?

thanks,
Jeff

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