GLFWtest0/Displayer.cpp at master · RailgunHamster/GLFWtest0 · GitHub

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//
//  Displayer.cpp
//  GLFWosxTEST1
//
//  Created by 王宇鑫 on 2017/9/7.
//  Copyright © 2017年 王宇鑫. All rights reserved.
//
#include "Displayer.hpp"
#include "Manager.hpp"
#include <iostream>
#include <string>
using namespace std;

Displayer& Displayer::displayer = Displayer::initDisplayer();
GLchar* Displayer::vertexShaderSource = new GLchar[200];
GLchar* Displayer::fragmentShaderSource = new GLchar[200];

Displayer::Displayer() : window(nullptr), title("Hello World"), windowWidth(800), windowHeight(600)
{
    ;
}

Displayer& Displayer::initDisplayer()
{
    //source
    vertexShaderSource = "#version 410 core\n\
        layout (location = 0) in vec3 position;\n\
        layout (location = 1) in vec3 color;\n\
        out vec3 ourColor;\n\
        void main()\n\
        {\n\
            gl_Position = vec4(position, 1.0);\n\
            ourColor = color;\n\
        }";

    fragmentShaderSource = "#version 410 core\n\
        in vec3 ourColor;\n\
        out vec4 color;\n\
        void main()\n\
        {\n\
            color = vec4(ourColor, 1.0);\n\
        }";
    //vec4(1.0, 0.5, 0.2, 1.0);
    //
    Displayer& d = *(new Displayer());

    if (!glfwInit())
        throw string("displayer init error");

    //
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 4);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
	glfwWindowHint(GLFW_OPENGL_FORWARD_COMPAT, GL_TRUE);
    glfwWindowHint(GLFW_OPENGL_PROFILE, GLFW_OPENGL_CORE_PROFILE);
    glfwWindowHint(GLFW_RESIZABLE, GL_FALSE);

    //
    d.window = glfwCreateWindow(d.windowWidth, d.windowHeight, d.title.c_str(), nullptr, nullptr);

    if (!d.window)
    {
        glfwTerminate();
        throw string("displayer window create error");
    }

    glfwSetErrorCallback(Manager::errorCallback);

    glfwSetKeyCallback(d.window, Manager::keyCallback);

    glfwMakeContextCurrent(d.window);

    gladLoadGLLoader((GLADloadproc)glfwGetProcAddress);

    //
    d.vertexShader = glad_glCreateShader(GL_VERTEX_SHADER);
    glad_glShaderSource(d.vertexShader, 1, &vertexShaderSource, nullptr);
    glad_glCompileShader(d.vertexShader);

    d.fragmentShader = glad_glCreateShader(GL_FRAGMENT_SHADER);
    glad_glShaderSource(d.fragmentShader, 1, &fragmentShaderSource, nullptr);
    glad_glCompileShader(d.fragmentShader);

/*    glad_glGetShaderiv(d.vertexShader, GL_COMPILE_STATUS, &success);

    if (!success)
    {
        glad_glGetShaderInfoLog(d.vertexShader, 512, nullptr, infoLog);
        throw string("shader compile error\n") + infoLog;
    }*/

    d.shaderProgram = glad_glCreateProgram();

    glad_glAttachShader(d.shaderProgram, d.vertexShader);
    glad_glAttachShader(d.shaderProgram, d.fragmentShader);
    glad_glLinkProgram(d.shaderProgram);

    GLint success;
    GLchar infoLog[512];
    glad_glGetProgramiv(d.shaderProgram, GL_LINK_STATUS, &success);
    if(!success)
    {
        glad_glGetProgramInfoLog(d.shaderProgram, 512, nullptr, infoLog);
        throw string("program link error\n") + infoLog;
    }

    glad_glDeleteShader(d.vertexShader);
    glad_glDeleteShader(d.fragmentShader);
    //
    glad_glGenVertexArrays(1, &d.VAO);
    glad_glGenBuffers(1, &d.VBO);
    glad_glGenBuffers(1, &d.EBO);

    glad_glBindVertexArray(d.VAO);

    glad_glBindBuffer(GL_ARRAY_BUFFER, d.VBO);
    glad_glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, d.EBO);

    Manager::manager.bufferData();

    glad_glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GL_FLOAT), (GLvoid*)0);
    glad_glEnableVertexAttribArray(0);
    glad_glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GL_FLOAT), (GLvoid*)(3 * sizeof(GL_FLOAT)));
    glad_glEnableVertexAttribArray(1);

    glad_glBindVertexArray(0);

    //test
    /*
    GLint nrAttributes;
    glad_glGetIntegerv(GL_MAX_VERTEX_ATTRIBS, &nrAttributes);
    cout << "Maximum nr of vertex attributes supported: " << nrAttributes << endl;
     */

    return d;
}

void Displayer::mainloop()
{
    while (!glfwWindowShouldClose(Displayer::window))
    {
        glfwPollEvents();

        Manager::manager.render();

        glfwSwapBuffers(Displayer::window);
    }

    //end
    glad_glDeleteVertexArrays(1, &VAO);
    glad_glDeleteBuffers(1, &VBO);

    glfwTerminate();
}