Linux 配置OpenGL环境

安装QT

sudo apt-get install qt5-default qtcreator

或者在应用管家中查找ｑｔ进行安装也可以．

安装glfw

1．安装cmake

sudo apt-get build-dep glfw
sudo apt-get install cmake xorg-dev libglu1-mesa-dev

安装中报了个无法解析域名archive.ubuntukylin.com 的错误，可以查看下自己的DNS Server:

cat /etc/resolv.conf
# This file is managed by man:systemd-resolved(8). Do not edit.
#
# This is a dynamic resolv.conf file for connecting local clients to the
# internal DNS stub resolver of systemd-resolved. This file lists all
# configured search domains.
#
# Run "systemd-resolve --status" to see details about the uplink DNS servers
# currently in use.
#
# Third party programs must not access this file directly, but only through the
# symlink at /etc/resolv.conf. To manage man:resolv.conf(5) in a different way,
# replace this symlink by a static file or a different symlink.
#
# See man:systemd-resolved.service(8) for details about the supported modes of
# operation for /etc/resolv.conf.

nameserver 127.0.0.53
options edns0
search DHCP HOST

如果你的和上边一样，只有１２７．０．０．５３这个地址，那可以通过下面的方式修改，再进行cmake的安装：

1. sudo vim /etc/resolv.conf # 添加如下内容
nameserver 8.8.8.8
nameserver 8.8.4.4
nameserver 127.0.0.1
2. 输入Esc，:wq，保存并退出
3. sudo /etc/init.d/networking restart

２．在　https://www.glfw.org/　下载GLFW压缩包到本地，找个文件集命名为GLFW，然后将压缩包内文件提取到该文件夹中，在该文件夹内打开终端窗窗口，执行

makedir build
cd build
cmake ../
make
sudo make install

安装glad

glad与glew作用相同，可以将其看作是glew的升级版

在下载页面选择版本和模式，版本选择最新，profile可以选择核心模式，还是Compatibility，如果不需要对老版本进行支持，建议选择核心模式．选好后点击generate, 跳转到下载页面，点击zip文件链接进行下载：

img

下载后，解压到本地，将include中的文件拷贝到/usr/local/include当中:

cd include
sudo mv * /usr/local/include

配置QT工程设置

考虑到跨平台，而且cmake使用较多，所以我们新建qt工程的时候使用的是camke作为工程配置的, 你可以根据需要，在最后的target_link_libraries中添加所需要的库即可

cmake_minimum_required(VERSION 2.8.12)

project(GLConsole)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_INCLUDE_CURRENT_DIR ON)
set(CMAKE_AUTOMOC ON)
set(SOURCE_FILES main.cpp glad.c) # 源文件

find_package(Qt5Core)

add_executable(${PROJECT_NAME} ${SOURCE_FILES})　

# 在这里添加lib库
target_link_libraries(${PROJECT_NAME} glfw3 GL m Xrandr Xi X11 Xxf86vm pthread dl Xinerama Xcursor)

配置好以后，我们就写一个Hello OpenGL吧，具体代码如下:

#include <iostream>

#include <glad/glad.h>
#include <GLFW/glfw3.h>

#define GOUT std::cout
#define GENDL std::endl

enum GError{
    GERROR_WINDOW_FAIL=-1,
    GERROR_GLFW_FAIL = -2,
    GERROR_GLAD_FAIL = -3
};

void framebuffer_size_callback(GLFWwindow* window, int width, int height)
{
    glViewport(0, 0, width, height);
}

int main()
{
    // system("pause");
    // 初始化glfw
    glfwInit();
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR,4);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR,5);
    glfwWindowHint(GLFW_OPENGL_PROFILE,GLFW_OPENGL_CORE_PROFILE);
    glfwWindowHint(GLFW_RESIZABLE,GL_FALSE);

    // Create GLWindow
    GLFWwindow* window = glfwCreateWindow(800, 600,"Hello OpenGL", nullptr, nullptr);
    if(nullptr == window)
    {
        GOUT<<"Failed to create OpenGL window."<<GENDL;
        glfwTerminate(); // Release GL Resources.
        return GERROR_WINDOW_FAIL;
    }
    glfwMakeContextCurrent(window);


    // Initialize GLAD
    if(!gladLoadGLLoader((GLADloadproc)glfwGetProcAddress))
    {
        std::cout << "Failed to initialize GLAD" << std::endl;
        return -1;
    }

    // 此函数设置窗口的维度(Dimension)
    glViewport(0, 0, 800, 600);
    glfwSetFramebufferSizeCallback(window, framebuffer_size_callback);

    while(!glfwWindowShouldClose(window))
    {
        glfwSwapBuffers(window);
        glfwPollEvents();
    }

    std::cout<<"hello open gl"<<std::endl;

    return 0;
}