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我在使用 opengles 创建帧缓冲区时遇到了一些问题。对于我的应用程序,我像这样创建主帧缓冲区:

glGenFramebuffers( 1, &viewFramebuffer );
glGenRenderbuffers( 1, &viewRenderbuffer );

glBindFramebuffer( GL_FRAMEBUFFER, viewFramebuffer );
glBindRenderbuffer( GL_RENDERBUFFER, viewRenderbuffer );
[ Context renderbufferStorage : GL_RENDERBUFFER fromDrawable : ( CAEAGLLayer* )self.layer ];
glFramebufferRenderbuffer( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER, viewRenderbuffer );

glGetRenderbufferParameteriv( GL_RENDERBUFFER, GL_RENDERBUFFER_WIDTH, &backingWidth );
glGetRenderbufferParameteriv( GL_RENDERBUFFER, GL_RENDERBUFFER_HEIGHT, &backingHeight );

if ( itUsesDepthBuffer )
{
    glGenRenderbuffers( 1, &depthRenderbuffer );
    glBindRenderbuffer( GL_RENDERBUFFER, depthRenderbuffer );
    glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH_COMPONENT16, backingWidth, backingHeight );
    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 ) );
    [ self destroyFramebuffer ];

    return NO;
}

但是函数 glGetRenderbufferParameteriv 为 GL_RENDERBUFFER_WIDTH 和 GL_RENDERBUFFER_HEIGHT 返回 0,最终 glCheckFramebufferStatus 返回错误,因为帧缓冲区附件不完整。

你知道为什么会这样吗?

先感谢您。

4

1 回答 1

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好的,我修复了它,它无法呈现缓冲区存储:

[ Context renderbufferStorage : GL_RENDERBUFFER fromDrawable : ( CAEAGLLayer* )self.layer ];

出于某种原因,我的“self.layer”没有返回正确的。

于 2013-02-04T14:04:40.560 回答