Ios GLKView,如果可能,如何使用blitFrameBuffer
这是我的设置,宽度和高度是GLKView的边界*缩放Ios GLKView,如果可能,如何使用blitFrameBuffer,ios,opengl-es,Ios,Opengl Es,这是我的设置,宽度和高度是GLKView的边界*缩放 private func initFrameBuffer() -> GLuint { var framebuffer_id: GLuint = 0 glGenFramebuffers(1, &framebuffer_id) glBindFramebuffer(GLenum(GL_FRAMEBUFFER), framebuffer_id) return framebuffer_id } priva
private func initFrameBuffer() -> GLuint {
var framebuffer_id: GLuint = 0
glGenFramebuffers(1, &framebuffer_id)
glBindFramebuffer(GLenum(GL_FRAMEBUFFER), framebuffer_id)
return framebuffer_id
}
private func initRenderBuffer(_ width: GLsizei, _ height: GLsizei) -> GLuint {
var renderBuffer_id: GLuint = 0
glGenRenderbuffers(1, &renderBuffer_id)
glBindRenderbuffer(GLenum(GL_RENDERBUFFER), renderBuffer_id)
glRenderbufferStorage(GLenum(GL_RENDERBUFFER), GLenum(GL_RGBA8), width, height)
glFramebufferRenderbuffer(GLenum(GL_FRAMEBUFFER), GLenum(GL_COLOR_ATTACHMENT0), GLenum(GL_RENDERBUFFER), renderBuffer_id)
return renderBuffer_id
}
func blitz() {
glBindFramebuffer(GLenum(GL_FRAMEBUFFER), frameBuffer)
bindDrawable()
glBlitFramebuffer(0, 0, width, height, 0, 0, width, height, GLbitfield(GL_COLOR_BUFFER_BIT), GLenum(GL_LINEAR))
}
我在draw(\urect)
中调用blitz()
,但什么也没发生,所以当我检查错误时,它会给我一个GL\u无效的操作
我还尝试获取ios FBO的id并手动绑定它,以代替调用bindDrawble()
,这也失败了。glBlitFramebuffer
将当前绑定的GL\u READ\u FRAMEBUFFER
复制到当前绑定的GL\u DRAW\u FRAMEBUFFER
。绑定到目标GL\u FRAMEBUFFER
是同时将FBO绑定到GL\u READ\u FRAMEBUFFER
和GL\u DRAW\u FRAMEBUFFER
的快捷方式,因此您的blit是从FRAMEBUFFER
到FRAMEBUFFER
,这是不允许的。非常感谢您