Method create

testbed/opengl-framework/src/FrameBufferObject.cpp:44–86

Create the frame buffer object

// Create the frame buffer object
bool FrameBufferObject::create(uint width, uint height, bool needRenderBuffer) {

    // Destroy the current FBO
    destroy();

    // Check that the needed OpenGL extensions are available
    bool isExtensionOK = checkOpenGLExtensions();
    if (!isExtensionOK) {
        std::cerr << "Error : Impossible to use Framebuffer Object on this platform" << std::endl;
        assert(false);
        return false;
    }

    // Generate a new FBO
    glGenFramebuffers(1, &mFrameBufferID);
    assert(mFrameBufferID != 0);

    // If we also need to create a render buffer
    if (needRenderBuffer) {

        // Generate the render buffer
        glGenRenderbuffers(1, &mRenderBufferID);
        assert(mRenderBufferID != 0);

        glBindRenderbuffer(GL_RENDERBUFFER, mRenderBufferID);
        glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT32, width, height);
        glBindFramebuffer(GL_FRAMEBUFFER, mFrameBufferID);
        glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER,
                                  mRenderBufferID);
        glBindRenderbuffer(GL_RENDERBUFFER, 0);
        glBindFramebuffer(GL_FRAMEBUFFER, 0);
    }

    // Check the FBO status
    GLenum statusFBO = glCheckFramebufferStatus(GL_FRAMEBUFFER);
    if(statusFBO != GL_FRAMEBUFFER_COMPLETE) {
        std::cerr << "Error : An error occured while creating the Frame Buffer Object !" << endl;
        assert(false);
        return false;
    }

    return true;
}

// Destroy the FBO
void FrameBufferObject::destroy() {