我写了一个类TestingView,它是NSOpenGLView的子类,并通过Interface Builder将它添加到NSWindow
@implementation TestingView
- (void)prepareOpenGL
{
[super prepareOpenGL];
glGenRenderbuffers( NumRenderbuffers, renderbuffer );
glBindRenderbuffer( GL_RENDERBUFFER, renderbuffer[Color] );
glRenderbufferStorage( GL_RENDERBUFFER, GL_RGBA, 1024, 768 );
glBindRenderbuffer( GL_RENDERBUFFER, renderbuffer[Depth] );
glRenderbufferStorage( GL_RENDERBUFFER, GL_DEPTH_COMPONENT24, 1024, 768);
glGenFramebuffers( 1, &framebuffer );
glBindFramebuffer( GL_DRAW_FRAMEBUFFER, framebuffer );
glFramebufferRenderbuffer( GL_DRAW_FRAMEBUFFER,
GL_COLOR_ATTACHMENT0, GL_RENDERBUFFER,
renderbuffer[Color] );
glFramebufferRenderbuffer( GL_DRAW_FRAMEBUFFER,
GL_DEPTH_ATTACHMENT, GL_RENDERBUFFER, renderbuffer[Depth] );
glEnable( GL_DEPTH_TEST );
}
- (void)show
{
glBindFramebuffer( GL_READ_FRAMEBUFFER, framebuffer );
glBindFramebuffer( GL_DRAW_FRAMEBUFFER, 0 );
glViewport(0, 0, self.window.frame.size.width, self.window.frame.size.height);
glClearColor( 0.0, 0.0, 0.0, 0.0 );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
glBlitFramebuffer( 0, 0, 1024, 768, 0, 0, 1024, 768, GL_COLOR_BUFFER_BIT, GL_NEAREST );
glSwapAPPLE();
}
- (void)draw
{
/* Prepare to render into the renderbuffer */
glBindFramebuffer( GL_DRAW_FRAMEBUFFER, framebuffer );
glViewport( 0, 0, 1024, 768 );
/* Render into renderbuffer */
glClearColor( 1.0, 1.0, 0.0, 1.0 );
glClear( GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT );
}
@end
它工作正常.但是在我的第二个项目中我不能使用Interface Builder,所以我这样做,
TestingView *testingView = [[TestingView alloc] initWithFrame:CGRectMake(0, 0, 1024, 768)];
[self.view addSubview:testingView];
它不起作用. OpengGLContext无法正确初始化.我也试过了
GLuint pixAttribs[] =
{
NSOpenGLPFAWindow, // choose among pixelformats capable of rendering to windows
NSOpenGLPFAAccelerated, // require hardware-accelerated pixelformat
NSOpenGLPFADoubleBuffer, // require double-buffered pixelformat
NSOpenGLPFAColorSize, 24, // require 24 bits for color-channels
NSOpenGLPFAAlphaSize, 8, // require an 8-bit alpha channel
NSOpenGLPFADepthSize, 24, // require a 24-bit depth buffer
NSOpenGLPFAMinimumPolicy, // select a pixelformat which meets or exceeds these requirements
0
};
NSOpenGLPixelFormat *pixFormat = [[NSOpenGLPixelFormat alloc] initWithAttributes:pixAttribs];
NSOpenGLContext *context = [[NSOpenGLContext alloc] initWithFormat:pixFormat shareContext:nil];
TestingView *testingView = [[TestingView alloc] initWithFrame:CGRectMake(0, 0, 1024, 768) pixelFormat:pixFormat];
testingView.openGLContext = context;
和OpenGL仍然无法正常工作.如何在不使用Interface Builder的情况下将NSOpenGLView添加为子视图?
最佳答案 我对那个人砸了几下头.我发现我的pixformat挡路了.这是我要做的:
// Assuming you have a self.window initialized somewhere
TestingView *testingView = [[TestingView alloc] initWithFrame:self.window.frame pixelFormat:nil];
[self.window setContentView:testingView];
你可以在这里查看我的完整实现(根本没有Interface Builder):https://gitorious.org/glengine/glengine