如何基于Mac OS X上的OpenGL上下文创建OpenCL上下文 [英] How to create OpenCL context based on the openGL context on mac os x

问题描述

我创建一个有关Mac OS X上的粒子系统项目。我发现在互联网上类似的问题，我的问题是一样的<一个href=\"http://stackoverflow.com/questions/28955023/how-can-i-create-an-shared-context-between-opengl-and-opencl-with-glfw3-on-osx\">How我可以创建的OpenGL和OpenCL之间的共享上下文与OSX glfw3？
，但我仍然没有解决我的问题呢。请帮帮我，谢谢你。

I am creating a project about particle system on mac os x. I found similar questions on Internet, and my question is the same as How can I create an shared context between OpenGL and OpenCL with glfw3 on OSX? ,but I still haven't solved my problem yet. Please help me, thank you.

这是我的code的一部分：

This is a part of my code:

    CGLContextObj glContext = CGLGetCurrentContext();
    CGLShareGroupObj shareGroup = CGLGetShareGroup(glContext);

    cl_context_properties props[] =
    {
      CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE,
      (cl_context_properties)kCGLShareGroup,`
      0
    };

我的错误信息是：

my error messages are :

particles.cpp：522：2：错误：CGLContextObj在此范围未声明
  CGLContextObj glContext = CGLGetCurrentContext（）;

particles.cpp：523：2：错误：CGLShareGroupObj在此范围未声明
  CGLShareGroupObj shareGroup = CGLGetShareGroup（glContext）;

particles.cpp：527：2：错误：CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE在此范围未声明
  CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE，

particles.cpp：528：25：错误：'kCGLShareGroup在此范围未声明（cl_context_properties）kCGLShareGroup，0

推荐答案

你包含哪些头文件？在头文件中的符号位置：

What header files do you include? Location of symbols in header files:

• 的#include＆LT;的OpenCL / cl_gl_ext.h＆GT; 为 CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE


• 的#include＆LT;的OpenGL / CGLDevice.h＆GT; 为 CGLGetShareGroup（）


• 的#include＆LT;的OpenGL / CGLCurrent.h＆GT; 为 CGLGetCurrentContext（）

• #include <OpenCL/cl_gl_ext.h> for CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE
• #include <OpenGL/CGLDevice.h> for CGLGetShareGroup()
• #include <OpenGL/CGLCurrent.h> for CGLGetCurrentContext()

虽然你的可能的包括上面的头文件，我觉得更方便，只是包括下列2头文件：

Although you could include the header files above, I find it more convenient to just include the following 2 header files:

#include <OpenCL/opencl.h>
#include <OpenGL/OpenGL.h>

举例code：

CGLContextObj    gl_ctx        = CGLGetCurrentContext();
CGLShareGroupObj gl_sharegroup = CGLGetShareGroup(gl_ctx);

cl_context default_ctx;
cl_context_properties properties[] = {
        CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE, (cl_context_properties) gl_sharegroup,
        0
};

cl_int err_code;
default_ctx = clCreateContext(  properties,
                                1,
                                &device, /* cl_device */
                                [](const char* errinfo, const void* private_info, size_t cb, void* user_data) -> void {
                                    /* context-creation and runtime error handler */
                                    cout << "Context error: " << errinfo << endl;
                                }, /* C++11, this parameter can be nullptr */
                                nullptr /*user_data*/,
                                &err_code);

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