opengl - FBO and mipmap textures

Question

Is it possible to attach a texture to an FBO which has mipmaps? I am currently trying to do this.I have a texture with several mipmap levels. I am attaching it to an FBO. When I clear the color for this buffer I still see the original texture in the output. Once I attach another texture with 1 mipmap level only the FBO draws the results correctly.

Answer 1

尽管没有任何代码很难说出您的问题出在哪里，但快速而简单的答案就是：当然这是可能的！有没有想过level所有这些glFramebufferTexture函数的参数是什么？

但是您只能写入相应纹理的单个 mipmap 级别，所有其他级别都将保持不变。通常的方法是写入 mipmap 级别 0（就像您对非 mipmap 纹理所做的那样）并通过glGenerateMipmap. 但是您也可以单独写入任何其他级别或每个级别。