TestWindow.cpp

#include <iostream>
#include <glad/glad.h>
#include <GLFW/glfw3.h>
#include <GL/gl.h>
#include <stb/stb_image.h>

#include "imgui.h"
#include "backends/imgui_impl_glfw.h"
#include "backends/imgui_impl_opengl2.h"

const unsigned int width = 800;
const unsigned int height = 600;

GLuint loadTexture(const char* path) {
    int widthImg, heightImg, numColCh;
    stbi_set_flip_vertically_on_load(true);
    unsigned char* bytes = stbi_load(path, &widthImg, &heightImg, &numColCh, 0);
    
    if (!bytes) {
        std::cout << "Failed to load image: " << path << std::endl;
        return 0;
    }
    
    GLuint textureID;
    glGenTextures(1, &textureID);
    glBindTexture(GL_TEXTURE_2D, textureID);
    
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE);
    glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE);
    
    GLenum format = (numColCh == 4) ? GL_RGBA : GL_RGB;
    glTexImage2D(GL_TEXTURE_2D, 0, format, widthImg, heightImg, 0, format, GL_UNSIGNED_BYTE, bytes);
    
    stbi_image_free(bytes);
    return textureID;
}

int main() {
    glfwInit();
    
    glfwWindowHint(GLFW_CONTEXT_VERSION_MAJOR, 2);
    glfwWindowHint(GLFW_CONTEXT_VERSION_MINOR, 1);
    
    GLFWwindow* window = glfwCreateWindow(width, height, "FISH-Engine Test", NULL, NULL);
    
    if (window == NULL) {
        std::cout << "Failed to create GLFW window\n";
        glfwTerminate();
        return -1;
    }
    
    glfwMakeContextCurrent(window);
    gladLoadGL();
    glViewport(0, 0, width, height);
    
    glEnable(GL_BLEND);
    glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
    
    IMGUI_CHECKVERSION();
    ImGui::CreateContext();
    ImGui::GetIO().ConfigFlags |= ImGuiConfigFlags_NavEnableKeyboard;
    ImGui::StyleColorsDark();
    
    ImGui_ImplGlfw_InitForOpenGL(window, true);
    ImGui_ImplOpenGL2_Init();
    
    GLuint goldfishTexture = loadTexture("goldfish.jpg");
    
    while (!glfwWindowShouldClose(window)) {
        glfwPollEvents();
        
        ImGui_ImplOpenGL2_NewFrame();
        ImGui_ImplGlfw_NewFrame();
        ImGui::NewFrame();
        
        ImGui::Begin("FISH-Engine", NULL, ImGuiWindowFlags_AlwaysAutoResize);
        
        ImGui::Text("Fish is gay :)");
        
        if (goldfishTexture != 0) {
            ImGui::Image((void*)(intptr_t)goldfishTexture, ImVec2(400, 300));
        } else {
            ImGui::Text("Failed to load goldfish.jpg");
        }
        
        ImGui::End();
        
        glClearColor(0.2f, 0.2f, 0.2f, 1.0f);
        glClear(GL_COLOR_BUFFER_BIT);
        
        ImGui::Render();
        ImGui_ImplOpenGL2_RenderDrawData(ImGui::GetDrawData());
        
        glfwSwapBuffers(window);
    }
    
    if (goldfishTexture != 0) {
        glDeleteTextures(1, &goldfishTexture);
    }
    
    ImGui_ImplOpenGL2_Shutdown();
    ImGui_ImplGlfw_Shutdown();
    ImGui::DestroyContext();
    
    glfwDestroyWindow(window);
    glfwTerminate();
    return 0;
}