Question

我正在mac os x上创建一个关于粒子系统的项目。我在互联网上发现了类似的问题，我的问题与How can I create an shared context between OpenGL and OpenCL with glfw3 on OSX?相同，但我还没有解决我的问题。请帮帮我，谢谢。

这是我的代码的一部分：

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

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

我的错误消息是：

particles.cpp:522:2: error: ‘CGLContextObj’ was not declared in this scope CGLContextObj glContext = CGLGetCurrentContext();

particles.cpp:523:2: error: ‘CGLShareGroupObj’ was not declared in this scope CGLShareGroupObj shareGroup = CGLGetShareGroup(glContext);

particles.cpp:527:2: error: ‘CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE’ was not declared in this scope CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE,

particles.cpp:528:25: error: ‘kCGLShareGroup’ was not declared in this scope (cl_context_properties)kCGLShareGroup,0

Answer 1

您包含哪些头文件？头文件中符号的位置：

#include <OpenCL/cl_gl_ext.h>

CL_CONTEXT_PROPERTY_USE_CGL_SHAREGROUP_APPLE

#include <OpenGL/CGLDevice.h>

CGLGetShareGroup()

#include <OpenGL/CGLCurrent.h>

CGLGetCurrentContext()

虽然可以包含上面的头文件，但我发现只包含以下2个头文件更方便：

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

示例代码：

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);

如何基于mac os x上的openGL上下文创建OpenCL上下文

1 个答案: