Question

我正在尝试使用GLFW在Mac上获得高于版本2的OpenGL上下文。我的配置是Mavericks（10.9.1）+ XCode，我有一个Nvidia Geforce 650M GPU，可能支持OpenGL 4.1 Full Profile。我使用以下代码：

    static void test_error_cb (int error, const char *description)
{
    fprintf(stderr, "%d: %s\n", error, description);
}

int main（void） { GLFWwindow *窗口;

glfwSetErrorCallback(test_error_cb);

// Initialise GLFW
if (!glfwInit())
{
    fprintf(stderr, "Failed to initialize GLFW\n");
    exit(EXIT_FAILURE);
}


//Request Specific Version
glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);

// Open OpenGL window
window = glfwCreateWindow(500, 500, "Split view demo", NULL, NULL);
if (!window)
{
    fprintf(stderr, "Failed to open GLFW window\n");

    glfwTerminate();
    exit(EXIT_FAILURE);
}

// Set callback functions
glfwSetFramebufferSizeCallback(window, framebufferSizeFun);
glfwSetWindowRefreshCallback(window, windowRefreshFun);
glfwSetCursorPosCallback(window, cursorPosFun);
glfwSetMouseButtonCallback(window, mouseButtonFun);
glfwSetKeyCallback(window, key_callback);

// Enable vsync
glfwMakeContextCurrent(window);
glfwSwapInterval(1);

glfwGetFramebufferSize(window, &width, &height);
framebufferSizeFun(window, width, height);

//Check Version
int major, minor, rev;
major = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MAJOR);
minor = glfwGetWindowAttrib(window, GLFW_CONTEXT_VERSION_MINOR);
rev = glfwGetWindowAttrib(window, GLFW_CONTEXT_REVISION);
printf("OpenGL version recieved: %d.%d.%d\n", major, minor, rev);
printf("Supported OpenGL is %s\n", (const char*)glGetString(GL_VERSION));
printf("Supported GLSL is %s\n", (const char*)glGetString(GL_SHADING_LANGUAGE_VERSION));


// Main loop
for (;;)
{
    // Only redraw if we need to
    if (do_redraw)
    {
        // Draw all views
        drawAllViews();

        // Swap buffers
        glfwSwapBuffers(window);

        do_redraw = 0;
    }

    // Wait for new events
    glfwWaitEvents();

    // Check if the window should be closed
    if (glfwWindowShouldClose(window))
        break;
}

// Close OpenGL window and terminate GLFW
glfwTerminate();

exit(EXIT_SUCCESS);

}

目前glfwCreateWindow函数失败。没有任何提示（即没有glfwWindowHint调用）我只能在1.20处使用带有glsl版本的OpenGL 2.1。指教。

Answer 1

在OSX上访问大于2.1的GL版本需要Core上下文。

取消注释GLFW_OPENGL_PROFILE提示。

Answer 2

尝试在#include <GLFW/glfw3.h>之前添加此内容并取消注释您的个人资料提示。

#define GLFW_INCLUDE_GLCOREARB

Answer 3

不确定为什么要禁用核心配置文件提示。我没有答案，但您可能通过错误回调获取更多信息，例如，

extern "C"
{
    static void test_error_cb (int error, const char *description)
    {
        fprintf(stderr, "%d: %s\n", error, description);
    }
}

...

{
    glfwSetErrorCallback(test_error_cb);

    if (glfwInit() != GL_TRUE)
    {
        ....

这是一个可以在glfwInit之前使用的功能。

GLFW无法在小牛队获得OpenGL 4.1上下文

3 个答案: