Inceptum/src/main/java/io/gitlab/jfronny/inceptum/InceptumGui.java

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Java
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2021-10-30 22:05:24 +02:00
package io.gitlab.jfronny.inceptum;
import imgui.ImGui;
import imgui.ImGuiIO;
import imgui.flag.ImGuiConfigFlags;
import imgui.gl3.ImGuiImplGl3;
import imgui.glfw.ImGuiImplGlfw;
import io.gitlab.jfronny.inceptum.util.api.account.AccountManager;
import io.gitlab.jfronny.inceptum.windows.MainWindow;
import io.gitlab.jfronny.inceptum.windows.Window;
import org.lwjgl.glfw.Callbacks;
import org.lwjgl.glfw.GLFW;
import org.lwjgl.glfw.GLFWErrorCallback;
import org.lwjgl.glfw.GLFWVidMode;
import org.lwjgl.opengl.GL;
import org.lwjgl.opengl.GL32;
import org.lwjgl.system.MemoryStack;
import org.lwjgl.system.MemoryUtil;
import java.io.IOException;
import java.io.InputStream;
import java.nio.IntBuffer;
import java.util.LinkedHashSet;
import java.util.Objects;
import java.util.Set;
public class InceptumGui {
public static final Set<Window> WINDOWS = new LinkedHashSet<>();
private static final ImGuiImplGlfw imGuiGlfw = new ImGuiImplGlfw();
private static final ImGuiImplGl3 imGuiGl3 = new ImGuiImplGl3();
/**
* Pointer to the native GLFW window.
*/
protected static long handle;
private static String glslVersion = null;
public static void main(String[] args) {
AccountManager.loadAccounts();
Inceptum.LOGGER.info("Initializing UI");
InceptumGui.WINDOWS.add(new MainWindow());
InceptumGui.init();
InceptumGui.run();
InceptumGui.dispose();
}
public static void open(Window window) {
WINDOWS.add(window);
}
/**
* Method to initialize application.
*/
public static void init() {
initWindow();
initImGui();
imGuiGlfw.init(handle, true);
imGuiGl3.init(glslVersion);
}
/**
* Method to dispose all used application resources and destroy its window.
*/
public static void dispose() {
imGuiGl3.dispose();
imGuiGlfw.dispose();
//TODO figure out why this is a problem
//ImGui.destroyContext();
Callbacks.glfwFreeCallbacks(handle);
GLFW.glfwDestroyWindow(handle);
GLFW.glfwTerminate();
Objects.requireNonNull(GLFW.glfwSetErrorCallback(null)).free();
}
/**
* Method to create and initialize GLFW window.
*/
protected static void initWindow() {
GLFWErrorCallback.createPrint(System.err).set();
if (!GLFW.glfwInit()) {
throw new IllegalStateException("Unable to initialize GLFW");
}
decideGlGlslVersions();
GLFW.glfwWindowHint(GLFW.GLFW_VISIBLE, GLFW.GLFW_FALSE);
GLFW.glfwWindowHint(GLFW.GLFW_RESIZABLE, GLFW.GLFW_FALSE);
handle = GLFW.glfwCreateWindow(10, 10, "Inceptum", MemoryUtil.NULL, MemoryUtil.NULL);
if (handle == MemoryUtil.NULL) {
throw new RuntimeException("Failed to create the GLFW window");
}
try (MemoryStack stack = MemoryStack.stackPush()) {
final IntBuffer pWidth = stack.mallocInt(1); // int*
final IntBuffer pHeight = stack.mallocInt(1); // int*
GLFW.glfwGetWindowSize(handle, pWidth, pHeight);
final GLFWVidMode vidmode = Objects.requireNonNull(GLFW.glfwGetVideoMode(GLFW.glfwGetPrimaryMonitor()));
GLFW.glfwSetWindowPos(handle, (vidmode.width() - pWidth.get(0)) / 2, (vidmode.height() - pHeight.get(0)) / 2);
}
GLFW.glfwMakeContextCurrent(handle);
GL.createCapabilities();
GLFW.glfwSwapInterval(GLFW.GLFW_TRUE);
clearBuffer();
renderBuffer();
}
private static void decideGlGlslVersions() {
final boolean isMac = System.getProperty("os.name").toLowerCase().contains("mac");
if (isMac) {
glslVersion = "#version 150";
GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MAJOR, 3);
GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MINOR, 2);
GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_PROFILE, GLFW.GLFW_OPENGL_CORE_PROFILE); // 3.2+ only
GLFW.glfwWindowHint(GLFW.GLFW_OPENGL_FORWARD_COMPAT, GLFW.GLFW_TRUE); // Required on Mac
} else {
glslVersion = "#version 130";
GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MAJOR, 3);
GLFW.glfwWindowHint(GLFW.GLFW_CONTEXT_VERSION_MINOR, 0);
}
}
/**
* Method to initialize Dear ImGui context. Could be overridden to do custom Dear ImGui setup before application start.
*/
protected static void initImGui() {
ImGui.createContext();
ImGuiIO io = ImGui.getIO();
io.addConfigFlags(ImGuiConfigFlags.ViewportsEnable);
//io.setConfigViewportsNoDecoration(false);
io.setConfigViewportsNoAutoMerge(true);
//TODO use included icons (https://www.nerdfonts.com/cheat-sheet)
//Nerd Fonts-patched ubuntu font
try (InputStream is = Inceptum.class.getClassLoader().getResourceAsStream("font.ttf")) {
assert is != null;
io.setFontDefault(io.getFonts().addFontFromMemoryTTF(is.readAllBytes(), 16f));
} catch (IOException e) {
e.printStackTrace();
}
applyTheme();
}
/**
* Main application loop.
*/
public static void run() {
while (!GLFW.glfwWindowShouldClose(handle)) {
//frame
clearBuffer();
imGuiGlfw.newFrame();
ImGui.newFrame();
//render
if (WINDOWS.isEmpty()) exit();
else {
Window[] array = WINDOWS.toArray(new Window[0]);
for (int i = 0, arrayLength = array.length; i < arrayLength; i++) {
Window window = array[i];
if (window.isNew()) window.preFirstDraw();
if (ImGui.begin(window.getName() + "##" + i, window.getOpenState(), window.getFlags()))
window.draw();
ImGui.end();
if (!window.getOpenState().get()) window.close();
}
}
//end frame
ImGui.render();
imGuiGl3.renderDrawData(ImGui.getDrawData());
if (ImGui.getIO().hasConfigFlags(ImGuiConfigFlags.ViewportsEnable)) {
final long backupWindowPtr = GLFW.glfwGetCurrentContext();
ImGui.updatePlatformWindows();
ImGui.renderPlatformWindowsDefault();
GLFW.glfwMakeContextCurrent(backupWindowPtr);
}
renderBuffer();
}
}
private static void clearBuffer() {
GL32.glClear(GL32.GL_COLOR_BUFFER_BIT | GL32.GL_DEPTH_BUFFER_BIT);
}
private static void renderBuffer() {
GLFW.glfwSwapBuffers(handle);
GLFW.glfwPollEvents();
}
public static void exit() {
GLFW.glfwSetWindowShouldClose(handle, true);
}
public static void applyTheme() {
if (Inceptum.CONFIG.darkTheme) ImGui.styleColorsDark();
else ImGui.styleColorsLight();
}
}