CODEWITHSUNDEEP
opengl
user3901459
user3901459

Reputation: 844

Framebuffer Incomplete Attachment for Texture with Internal Format?

So i am trying to create a FrameBuffer where i render to a texture, but i can't seem to get it to work with the format i need. That is GL_RGB32F. It works for GL_RGB16F and GL_RGBA32F so i don't understand why GL_RGB32F is giving me GL_FRAMEBUFFER_INCOMEPLETE_ATTACHMENT from glCheckFramebufferStatus. I get no errors from the calls creating the texture either. Is there a special requirement to use that internal format? Can i see if i have support for it?

glGenFramebuffers(1, &fbo);
glBindFramebuffer(GL_FRAMEBUFFER, fbo);

glGenTextures(1, &positionTexture);
    glBindTexture(GL_TEXTURE_2D, positionTexture);
    glTexImage2D(GL_TEXTURE_2D, 0, GL_RGB32F, width, height, 0, GL_RGB, GL_FLOAT, nullptr);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);

    glFramebufferTexture2D(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D, positionTexture, 0);

Upvotes: 2

Views: 2302

Answers (1)

derhass
derhass

Reputation: 45322

GL_RGB16F andGL_RGB32F are not required color buffer formats in the GL, while GL_RGBA32F is. You can have a look in Table 8.12 of the OpenGL 4.5 core profile specification (pages 198-200, assuming june 2017 revision of said document). It tells you that all these mentioned formats are color renderable but only GL_RGBA32F out of that set is a required render format. Implementations might support the other ones optionally, but you can't rely on that.

Upvotes: 5

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