OpenGL-ES 学习(6)---- Ubuntu OES 环境搭建

OpenGL-ES Ubuntu 环境搭建

此的方法在 ubuntu 和 deepin 上验证都可以成功搭建

软件包安装

sudo apt install libx11-dev
sudo apt install libglfw3 libglfw3-dev
sudo apt-get install libgles2-mesa
sudo apt-get install libgles2-mesa-dev

检查环境是否安装成功：
/usr/include 下是否有 EGL GL GLES2 GLES3 的目录

Note: 上面的环境中同时安装了 x11 和 glfw，实际上只需要安装一个自己需要的即可, x11 和 glfw 都是为 OES 环境对接到窗口系统中，
个人觉得 x11 的API 对 egl 的封装比较标准话一些，可以用于学习 egl 的api

第一个三角形

基于 glfw 实现

#include <stdio.h>
#include <time.h>
#include <GLES2/gl2.h>
#include <GLFW/glfw3.h>

// Vertex Shader source code
// Vertex Shader source code
const GLchar* vertexSource =
        "#version 300 es\n"
        "layout(location = 0) in vec4 position;\n"
        "void main() {\n"
        "    gl_Position = position;\n"
        "}\n";

// Fragment Shader source code
const GLchar* fragmentSource =
        "#version 300 es\n"
        "precision mediump float;\n"
        "out vec4 fragColor;\n"
        "void main() {\n"
        "    fragColor = vec4(1.0, 0.0, 0.0, 1.0);\n"
        "}\n";

int main() {
   
   
    printf("main testsuites enter n");
    // Initialize GLFW
    if (!glfwInit()) {
   
   
        fprintf(stderr, "Failed to initialize GLFW\n");
        return -1;
    }

    // Create a windowed mode window and its OpenGL context
    GLFWwindow* window = glfwCreateWindow(640, 480, "opengles-glfw", NULL, NULL);
    if (!window) {
   
   
        fprintf(stderr, "Failed to create GLFW window\n");
        glfwTerminate();
        return -1;
    }
    // Make the window's context current
    glfwMakeContextCurrent(window);

    // Load the OpenGL ES functions
    glClearColor(0.0f, 0.0f, 0.0f, 1.0f);

    // Create and compile the vertex shader
    GLint status;
    GLuint vertexShader = glCreateShader(GL_VERTEX_SHADER);
    glShaderSource(vertexShader, 1, &vertexSource, NULL);
    glCompileShader(vertexShader);
    // Check for compilation errors
    if (status != GL_TRUE) {
   
   
        char buffer[512];
        glGetShaderInfoLog(vertexShader, 512, NULL, buffer);
        fprintf(stderr, "Vertex Shader Compile Error: %s\n", buffer);
    }

    // Create and compile the fragment shader
    GLuint fragmentShader = glCreateShader(GL_FRAGMENT_SHADER);
    glShaderSource(fragmentShader, 1, &fragmentSource, NULL);
    glCompileShader(fragmentShader);
    glGetShaderiv(fragmentShader, GL_COMPILE_STATUS, &status);
    if (status != GL_TRUE) {
   
   
        char buffer[512];
        glGetShaderInfoLog(fragmentShader, 512, NULL, buffer);
        fprintf(stderr, "Fragment Shader Compile Error: %s\n", buffer);
    }

    // Link the vertex and