尝试附加纹理时，GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT [英] GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT when trying to attach texture

问题描述

尝试创建渲染为纹理的帧缓冲区后，出现错误GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT.我不知道出了什么问题，我们将不胜感激.

I get an error GL_FRAMEBUFFER_INCOMPLETE_ATTACHMENT after I try to create a framebuffer that renders to a texture. I can't figure out what is wrong, any help is greatly appreciated.

已修复！工作代码:

    glGenTextures(1, &texture);
    glBindTexture(GL_TEXTURE_2D, texture);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGBA, 768, 1024, 0, GL_RGBA, GL_UNSIGNED_BYTE, 0);
    glBindTexture(GL_TEXTURE_2D, 0);

    glGenRenderbuffers(1, &rboID);
    glBindRenderbuffer(GL_RENDERBUFFER, rboID);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, 768, 1024);
    glBindRenderbuffer(GL_RENDERBUFFER, 0);

    glGenFramebuffers(1, &backFramebuffer);
    glBindFramebuffer(GL_FRAMEBUFFER, backFramebuffer);
    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, texture, 0);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, rboID);
    [self checkFramebufferStatus];
    glBindFramebuffer(GL_FRAMEBUFFER, 0);

注意:如果您的版本不起作用，请确保在每次调用后检查错误，并且在第一次调用之前清除错误，否则您将在此之前对代码进行错误检查.

Note: If your version doesn't work, make sure you check for errors after each and every call AND that you clear the error before your first call, else you'll be error-checking the code before that.

推荐答案

纹理可能不完整.纹理的默认MIN_FILTER指定了mipmapping，但是您仅提供了纹理级别0，因此纹理本身是不完整的.

It is likely that the texture is incomplete. The default MIN_FILTER for a texture specifies mipmapping, but you've provided only for Texture Level 0, so the texture itself is incomplete.

添加对glTexParamter的调用，以将MIN_FILTER设置为非映射模式之一.

Add calls to glTexParamter to set the MIN_FILTER to one of the non-mipmapped modes.

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