opengl - CL GL Interop：CL 上下文创建参数

问题描述

我一直在尝试创建一个绑定到 OpenGL 上下文的 OpenCL 上下文。我未能找到查询可用设备的方法properties所需的参数的适当值。KHRGLSharing.clGetGLContextInfoKHROpenGL 上下文是使用 GLFW 创建的，我要使用的窗口是当前上下文（使用设置glfwMakeContextCurrent）

以下代码片段显示了我到目前为止的想法：

public static List<Long> queryDevicesForPlatform(long platform) {
        stack.push(); // MemoryStack defined elsewhere
        //Create properties
        //Problematic piece of code
        long[] properties =  switch (Platform.get()) {
            //These parameters let the JVM crash when clGetGLContextInfoKHR is called
            case LINUX -> new long[]{
                    CL_CONTEXT_PLATFORM, platform,
                    CL_GL_CONTEXT_KHR, GLX14.glXGetCurrentContext(),
                    CL_GLX_DISPLAY_KHR, GLX14.glXGetCurrentDisplay(),
                    0
            };
            //Not yet tested
            case MACOSX -> new long[]{
                    CL_CONTEXT_PLATFORM, platform,
                    CL_CGL_SHAREGROUP_KHR, CGL.CGLGetShareGroup(CGL.CGLGetCurrentContext()),
                    0
            };
            //This one works
            case WINDOWS -> new long[]{
                    CL_CONTEXT_PLATFORM, platform,
                    CL_GL_CONTEXT_KHR, glfwGetCurrentContext(),
                    CL_WGL_HDC_KHR, wglGetCurrentDC(),
                    0
            };
        };

        //Copy properties to a buffer
        ByteBuffer byteProp = stack.malloc(properties.length * Long.BYTES);
        byteProp.asLongBuffer().put(properties);
        ByteBuffer bytes = stack.malloc(Long.BYTES);

        //JVM crashes here
        int error = KHRGLSharing.clGetGLContextInfoKHR(PointerBuffer.create(byteProp),
                CL_DEVICES_FOR_GL_CONTEXT_KHR, (ByteBuffer) null, PointerBuffer.create(bytes));
        assert error == CL22.CL_SUCCESS: error;

        ByteBuffer value = stack.malloc((int) bytes.asLongBuffer().get(0));
        error = KHRGLSharing.clGetGLContextInfoKHR(PointerBuffer.create(byteProp), CL_DEVICES_FOR_GL_CONTEXT_KHR, value, null);
        assert error == CL22.CL_SUCCESS: error;
        LongBuffer devices = value.asLongBuffer();

        ArrayList<Long> ret = new ArrayList<>();
        while(devices.hasRemaining()) {
            ret.add(devices.get());
        }

        stack.pop();
        return ret;
    }

Linux：我不知道要为和传递CL_CONTEXT_PLATFORM什么CL_GL_CONTEXT_KHR值CL_GLX_DISPLAY_KHR。当前使 JVM 崩溃并带有SIGSEGV.

Windows：代码有效，但我不确定这是否是正确的方法。

Apple：我没有机器可以对此进行测试，但如果我也知道那里的正确参数，我将不胜感激。

标签： openglopencllwjglglfw

opengl - CL GL Interop：CL 上下文创建参数

问题描述

解决方案

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