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我正在尝试将 3D 场景渲染为多重采样 FBO。我使用以下代码 FBO 创建 FBO:

GLuint fbo, vtex, depthbuffer;
glGenTextures(1, &vtex); GLCHECK();
glBindTexture( vtarget, vtex ); GLCHECK();
glTexImage2DMultisample( GL_TEXTURE_2D_MULTISAMPLE, samples /*=4*/, GL_RGBA, width, height, false); GLCHECK();
glBindTexture(vtarget, 0); GLCHECK();

glGenRenderbuffers(1, &depthbuffer); GLCHECK();
glBindRenderbuffer(GL_RENDERBUFFER, depthbuffer); GLCHECK();
glRenderbufferStorageMultisample(GL_RENDERBUFFER, samples/*=4*/, GL_DEPTH_COMPONENT32, width, height); GLCHECK();
glBindRenderbuffer(GL_RENDERBUFFER, 0); GLCHECK();

glGenFramebuffers( 1, &fbo );GLCHECK();
glBindFramebuffer( GL_FRAMEBUFFER, fbo );GLCHECK();
glFramebufferRenderbuffer(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, depthbuffer); GLCHECK();
glFramebufferTexture2D( GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, GL_TEXTURE_2D_MULTISAMPLE, vtex, 0 ); GLCHECK();

if ((status = glCheckFramebufferStatus(GL_FRAMEBUFFER)) != GL_FRAMEBUFFER_COMPLETE)
{
    fprintf(stderr, "Can't allocate frame buffer! Status: 0x%x\n", status);
    assert(0);
}
glBindFramebuffer(GL_FRAMEBUFFER, 0); GLCHECK();

我得到错误 GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE。我做错了什么?

A 已阅读 主题,FBO 文档,但没有帮助。

我可以创建没有深度附件的 FBO。但在这种情况下,当我尝试将它放到屏幕上时它不起作用:

 glBindFramebuffer(GL_READ_FRAMEBUFFER, fbo); GLCHECK();
 glReadBuffer(GL_COLOR_ATTACHMENT0);

 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 0); GLCHECK();
 glDrawBuffer(GL_BACK); GLCHECK();

 glBlitFramebuffer(0, 0, resolution.width, resolution.height, 0, 0, resolution.width, resolution.height, GL_COLOR_BUFFER_BIT, GL_NEAREST); GLCHECK();

 glBindFramebuffer(GL_FRAMEBUFFER, 0);

请帮帮我。

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1 回答 1

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您需要指定固定的样本位置。例如GL_TRUE对于 的最后一个参数glTexImage2DMultisample

GL_FRAMEBUFFER_INCOMPLETE_MULTISAMPLE 您可以在此处阅读有关原因。

于 2015-08-31T12:23:02.957 回答