Open GL ES 2.0 renderbufferStorage returns false

Question

我试图创建一个Framebuffer来显示我的iOS应用程序中的3D模型，但是当Framebuffer被创建时，renderbufferStorage返回false。我的代码是基于glcamerariapple的示例代码。

创建帧缓冲区的代码如下:

- (void)createFramebuffer
{
if (_context && !defaultFramebuffer) {
    [EAGLContext setCurrentContext:_context];
    // Create default framebuffer object
    glGenFramebuffers(1, &defaultFramebuffer);
    glBindFramebuffer(GL_FRAMEBUFFER, defaultFramebuffer);
    // Create colour renderbuffer and allocate backing store
    glGenRenderbuffers(1, &colorRenderbuffer);
    glBindRenderbuffer(GL_RENDERBUFFER, colorRenderbuffer);
    // Allocate the renderbuffer's storage (shared with the drawable object)
    CAEAGLLayer *layer = (CAEAGLLayer*)self.glkView.layer;
    BOOL success = [_context renderbufferStorage:GL_RENDERBUFFER fromDrawable:layer];
    if(!success) {
        NSLog(@"Error rendering buffer storage");
    }
    glRenderbufferStorage(GL_RENDERBUFFER, GL_RGBA4, layer.bounds.size.width, layer.bounds.size.height);
    glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &framebufferWidth);
    glGetRenderbufferParameteriv(GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &framebufferHeight);

    // Create the depth render buffer and allocate storage
    glGenRenderbuffers(1, &depthRenderbuffer);
    glBindRenderbuffer(GL_RENDERBUFFER, depthRenderbuffer);
    glRenderbufferStorage(GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, framebufferWidth, framebufferHeight);
    // Attach colour and depth render buffers to the frame buffer
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, colorRenderbuffer);
    glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthRenderbuffer);

    if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE)
        NSLog(@"Failed to make complete framebuffer object %x", glCheckFramebufferStatus(GL_FRAMEBUFFER));
}
}

任何帮助都将不胜感激。

Answer 1

我也在努力解决这个问题，并找到了一个适合我的解决方案。我用的是

var openGLView = OpenGLView()

和"renderbufferStorage"返回false。在我把它改成

之后

var openGLView: OpenGLView!

我得到"renderbufferStorage"返回true

Answer 2

你不能在iOS中使用标准的renderbufferStorage。你必须使用一个对象这个对象是EAGLContext