ImGui 与高兴的 openGL 加载器抛出分段错误(核心转储)

ImGui with the glad openGL loader throws segmentation fault (core dumped)

本文关键字:错误 分段 核心 转储 高兴 openGL 加载 ImGui      更新时间:2023-10-16

我是ImGue库的新手,最近我一直在尝试包含的示例。一切都像魅力一样工作,直到我将gl3w的包含(和功能(更改为glad(我想使用的加载器(。当我在两个加载器之间交换时,我在imgui_impl_glfw_gl3.cpp文件中出现了分段错误异常。我发现一篇文章表明这可能是因为某些函数无法"绑定"并产生空指针而发生的。

我已经在imgui_impl_glfw_gl3.cpp line 216中找到了错误这是第 216 行中的代码:

glGetIntegerv(GL_TEXTURE_BINDING_2D, &last_texture);

我还将 imgui_impl_glfw_gl3.cpp 中的包含文件从 gl3w 更改为glad,但没有结果。

这是我正在执行的主要函数(这是使用 glad 的 imgui 的基本 opengl3 示例(:

#include "gui/imgui.h"
#include "gui/imgui_impl_glfw_gl3.h"
#include <stdio.h>
#include <glad/glad.h>    // This example is using gl3w to access OpenGL functions (because it is small). You may use glew/glad/glLoadGen/etc. whatever already works for you.
#include <GLFW/glfw3.h>
static void error_callback(int error, const char* description)
{
    fprintf(stderr, "Error %d: %sn", error, description);
}
int main(int, char**)
{
    // Setup window
    glfwSetErrorCallback(error_callback);
    if (!glfwInit())
        return 1;
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 3);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 2);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
    GLFWwindow* window = glfwCreateWindow(1280, 720, "ImGui OpenGL3 example", NULL, NULL);
    glfwMakeContextCurrent(window);
    glfwSwapInterval(1); // Enable vsync
    glfwInit();
    // Setup ImGui binding
    ImGui_ImplGlfwGL3_Init(window, true);
    // Setup style
    //ImGui::StyleColorsDark();
    ImGui::StyleColorsClassic();
    bool show_demo_window = true;
    bool show_another_window = false;
    bool algo = true;
    ImVec4 clear_color = ImVec4(0.45f, 0.55f, 0.60f, 1.00f);
    // Main loop
    while (!glfwWindowShouldClose(window))
    {
        glfwPollEvents();
        ImGui_ImplGlfwGL3_NewFrame();
        // 1. Show a simple window.
        // Tip: if we don't call ImGui::Begin()/ImGui::End() the widgets automatically appears in a window called "Debug".
        {
            static float f = 0.0f;
            static int counter = 0;
            ImGui::Text("Hello, world!");                           // Display some text (you can use a format string too)
            ImGui::SliderFloat("float", &f, 0.0f, 1.0f);            // Edit 1 float using a slider from 0.0f to 1.0f    
            ImGui::ColorEdit3("COLORINES", (float*)&clear_color); // Edit 3 floats representing a color
            ImGui::Checkbox("Demo Window", &show_demo_window);      // Edit bools storing our windows open/close state
            ImGui::Checkbox("Booleanooooo", &algo);
            ImGui::Checkbox("Another Window", &show_another_window);
            if (ImGui::Button("Button"))                            // Buttons return true when clicked (NB: most widgets return true when edited/activated)
                counter++;
            ImGui::SameLine();
            ImGui::Text("counter = %d", counter);
            ImGui::Text("pues se ve que hay texto: %d", algo);
            ImGui::Text("Application average %.3f ms/frame (%.1f FPS)", 1000.0f / ImGui::GetIO().Framerate, ImGui::GetIO().Framerate);
        }
        {
            ImGui::Begin("VENTANA WAPA");
            ImGui::Text("POS SA QUEDAO BUENA VENTANA");
            static float yee = 0.0f;
            ImGui::SliderFloat("lel", &yee,1.0f,0.5f);
            ImGui::End();
        }
        // 2. Show another simple window. In most cases you will use an explicit Begin/End pair to name your windows.
        if (show_another_window)
        {
            ImGui::Begin("Another Window", &show_another_window);
            ImGui::Text("Hello from another window!");
            if (ImGui::Button("Close Me"))
                show_another_window = false;
            ImGui::End();
        }
        // 3. Show the ImGui demo window. Most of the sample code is in ImGui::ShowDemoWindow(). Read its code to learn more about Dear ImGui!
        if (show_demo_window)
        {
            ImGui::SetNextWindowPos(ImVec2(650, 20), ImGuiCond_FirstUseEver); // Normally user code doesn't need/want to call this because positions are saved in .ini file anyway. Here we just want to make the demo initial state a bit more friendly!
            ImGui::ShowDemoWindow(&show_demo_window);
        }
        // Rendering
        int display_w, display_h;
        glfwGetFramebufferSize(window, &display_w, &display_h);
        glViewport(0, 0, display_w, display_h);
        glClearColor(clear_color.x, clear_color.y, clear_color.z, clear_color.w);
        glClear(GL_COLOR_BUFFER_BIT);
        ImGui::Render();
        glfwSwapBuffers(window);
    }
    // Cleanup
    //ImGui_ImplGlfwGL3_Shutdown();
    glfwTerminate();
    return 0;
}

我不知道为什么会发生这种情况,而且我对打开GL an ImGui很陌生,所以,有什么想法吗? :(

Glad 和 gl3w 都是扩展加载器库。 在使用之前,通常需要在当前的 GL 上下文中初始化它们。

原始代码称为 gl3wInit() 。 你的缺少任何一种快乐的初始化。

确保在glfwMakeContextCurrent()之后和调用任何OpenGL函数之前初始化了apping(gladLoadGLLoader((GLADloadproc) glfwGetProcAddress)(。

否则,所有 OpenGL 函数指针 happy 声明将保持 NULL。 尝试调用 NULL 函数指针通常不适合进程。