Method getGPUInfos

Engine/OSGLContext_mac.cpp:523–635

// clang-format on

void
OSGLContext_mac::getGPUInfos(std::list<OpenGLRendererInfo>& renderers)
{
    CGLContextObj curr_ctx = 0;

    curr_ctx = CGLGetCurrentContext (); // get current CGL context

    CGLRendererInfoObj rend;
    GLint nrend = 0;
    CGLQueryRendererInfo(0xffffffff, &rend, &nrend);
    for (GLint i = 0; i < nrend; ++i) {
        OpenGLRendererInfo info;
        GLint rendererID, haccelerated;
        if (CGLDescribeRenderer(rend, i,  kCGLRPRendererID, &rendererID) != kCGLNoError) {
            qDebug() << "Could not describe OpenGL renderer" << i;
            continue;
        }
        CGLDescribeRenderer(rend, i,  kCGLRPAccelerated, &haccelerated);

        // We don't allow renderers that are not hardware accelerated
        if (!haccelerated) {
            qDebug() << "OpenGL renderer" << RendererIDString(rendererID) << "is not accelerated";
            continue;
        }

        info.rendererID.renderID = rendererID;

#if !defined(MAC_OS_X_VERSION_10_7) || \
        MAC_OS_X_VERSION_MAX_ALLOWED < MAC_OS_X_VERSION_10_7
        GLint nBytesMem;
        CGLDescribeRenderer(rend, i,  kCGLRPVideoMemory, &nBytesMem);
        GLint nBytesTexMem;
        CGLDescribeRenderer(rend, i,  kCGLRPTextureMemory, &nBytesTexMem);
        qDebug() << "OpenGL renderer" << RendererIDString(rendererID) << "has" << nBytesMem/(1024.*1024.) << "MB of VRAM and" << nBytesTexMem/(1024.*1024.) << "MB of texture";

        info.maxMemBytes = (std::size_t)nBytesMem;
#else
        //Available in OS X v10.0 and later.
        //Deprecated in OS X v10.7.
        GLint nMBMem;
        CGLDescribeRenderer(rend, i,  kCGLRPVideoMemoryMegabytes, &nMBMem);
        GLint nMBTexMem;
        CGLDescribeRenderer(rend, i,  kCGLRPTextureMemoryMegabytes, &nMBTexMem);

        info.maxMemBytes = (std::size_t)nMBMem * 1e6;
        qDebug() << "OpenGL renderer" << RendererIDString(rendererID) << "has" << nMBMem << "MB of VRAM and" << nMBTexMem << "MB of texture";

        // Available in OS X v10.9
        //GLint maxOpenGLMajorVersion;
        //CGLDescribeRenderer(rend, i,  kCGLRPMajorGLVersion, &maxOpenGLMajorVersion);

#endif
        /*GLint fragCapable, clCapable
           CGLDescribeRenderer(rend, i,  kCGLRPGPUFragProcCapable, &fragCapable);
           CGLDescribeRenderer(rend, i,  kCGLRPAcceleratedCompute, &clCapable);*/
        //info.fragCapable = (bool)fragCapable;
        //info.clCapable = (bool)clCapable;