Question

我正在尝试在MacOS上升级到OpenGL 4.1。为此，我正在尝试使用MultiSample技术。这是我选择像素格式的代码：

GLint answer;
int numAttribs = 0;
CGLRendererInfoObj rend;
bool multisampleSupport = false;

CGLQueryRendererInfo(CGDisplayIDToOpenGLDisplayMask
(kCGDirectMainDisplay), &rend, &answer);

CGLDescribeRenderer(rend, 0, kCGLRPSampleModes, &answer);
if ((answer & kCGLMultisampleBit) != 0)
    multisampleSupport = true;

NSOpenGLPixelFormatAttribute attributes[64] = { 0 };

attributes[numAttribs++] = NSOpenGLPFAOpenGLProfile;
attributes[numAttribs++] = NSOpenGLProfileVersion4_1Core;
attributes[numAttribs++] = NSOpenGLPFADoubleBuffer;
attributes[numAttribs++] = NSOpenGLPFAClosestPolicy;
attributes[numAttribs++] = NSOpenGLPFANoRecovery;
attributes[numAttribs++] = NSOpenGLPFAColorSize;
attributes[numAttribs++] = (NSOpenGLPixelFormatAttribute) 24;
attributes[numAttribs++] = NSOpenGLPFAAlphaSize;
attributes[numAttribs++] = (NSOpenGLPixelFormatAttribute) 8;
attributes[numAttribs++] = NSOpenGLPFADepthSize;
attributes[numAttribs++] = (NSOpenGLPixelFormatAttribute) 24;
attributes[numAttribs++] = NSOpenGLPFAStencilSize;
attributes[numAttribs++] = (NSOpenGLPixelFormatAttribute) 1;

if (multisampleSupport)
{
    attributes[numAttribs++] = NSOpenGLPFAMultisample;
    attributes[numAttribs++] = NSOpenGLPFASampleBuffers;
    attributes[numAttribs++] = (NSOpenGLPixelFormatAttribute) 1;
    attributes[numAttribs++] = NSOpenGLPFASamples;
    attributes[numAttribs++] = (NSOpenGLPixelFormatAttribute) 4;
}

_masterPixelFormat = (WCOGLPixelFormatRef)[[NSOpenGLPixelFormat alloc] initWithAttributes:(NSOpenGLPixelFormatAttribute*) attributes];

如果我将multisampleSupport设置为FALSE，则一切正常（当然，没有抗锯齿）。但是，如果由于渲染器支持而将其设置为true（应该如此），则会显示白色窗口。

是的，我知道OpenGL已弃用，但它仍然可以正常工作。我在做什么错了？

Mac OS上的OpenGL MultiSampling提供白色窗口

0 个答案: