Rusettsten
commented
6 months ago UPDATE: I was able to replicate the bug by creating a new project with the default ImGui pom.xml for Maven and use the following code.
`import static org.lwjgl.glfw.GLFW.glfwPollEvents; import static org.lwjgl.glfw.GLFW.glfwSwapBuffers; import static org.lwjgl.glfw.GLFW.glfwWindowShouldClose;
import java.awt.Color; import java.io.IOException; import java.net.URISyntaxException; import java.nio.IntBuffer; import java.nio.file.Files; import java.nio.file.Paths; import java.util.Objects;
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.opengl.GLCapabilities; import org.lwjgl.system.MemoryStack; import org.lwjgl.system.MemoryUtil;
import imgui.ImFont; import imgui.ImFontAtlas; import imgui.ImFontConfig; import imgui.ImGui; import imgui.ImGuiIO; import imgui.flag.ImGuiConfigFlags; import imgui.gl3.ImGuiImplGl3; import imgui.glfw.ImGuiImplGlfw;
public class Main {
/*
* VARIABLES
*/
private final ImGuiImplGlfw imGuiGlfw = new ImGuiImplGlfw();
private final ImGuiImplGl3 imGuiGl3 = new ImGuiImplGl3();
private String GLSLversion = "#version 150";
private Color colorBg = new Color(.2f, 0f, .4f, 1);
public long windowHandle;
private GLCapabilities capabilities;
private ImFont defaultFont = new ImFont();
/*
* METHODS - MAIN
*/
public static void main(String[] args) {
Main main = new Main();
main.init();
while(!glfwWindowShouldClose(main.windowHandle)) {
main.processFrame();
}
}
/*
* METHODS - INIT
*/
public void init() {
initWindow();
ImGui.createContext();
imGuiGlfw.init(windowHandle, true);
imGuiGl3.init(GLSLversion);
setupDefaultFont();
}
private void initWindow() {
GLFWErrorCallback.createPrint(System.err).set();
if (!GLFW.glfwInit()) {
throw new IllegalStateException("Unable to initialize GLFW!");
}
//Set GLSL Version
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 for Mac Support
GLFW.glfwWindowHint(GLFW.GLFW_VISIBLE, GLFW.GLFW_FALSE);
final GLFWVidMode vidmode = Objects.requireNonNull(GLFW.glfwGetVideoMode(GLFW.glfwGetPrimaryMonitor()));
windowHandle = GLFW.glfwCreateWindow(vidmode.width(), vidmode.height(), "Font Test", MemoryUtil.NULL, MemoryUtil.NULL);
if (windowHandle == MemoryUtil.NULL) {
throw new RuntimeException("Failed to create GUI GLFW window!");
}
try (MemoryStack stack = MemoryStack.stackPush()) {
final IntBuffer pWidth = stack.mallocInt(1); // int*
final IntBuffer pHeight = stack.mallocInt(1); // int*
GLFW.glfwGetWindowSize(windowHandle, pWidth, pHeight);
GLFW.glfwSetWindowPos(windowHandle, (vidmode.width() - pWidth.get(0)) / 2, (vidmode.height() - pHeight.get(0)) / 2);
}
GLFW.glfwMakeContextCurrent(windowHandle);
GLFW.glfwSwapInterval(GLFW.GLFW_TRUE);
GLFW.glfwShowWindow(windowHandle);
GLFW.glfwMaximizeWindow(windowHandle);
capabilities = GL.createCapabilities();
}
public static byte[] loadBytesFromResources(String name) {
try {
return Files.readAllBytes(Paths.get(Main.class.getResource(name).toURI()));
} catch (IOException | URISyntaxException e) {
e.printStackTrace();
}
return null;
}
private void setupDefaultFont() {
final ImGuiIO io = ImGui.getIO();
ImFontAtlas fontAtlas = ImGui.getIO().getFonts();
fontAtlas.setLocked(false);
defaultFont = io.getFonts().addFontDefault();
final ImFontConfig fontConfig = new ImFontConfig();
fontConfig.setMergeMode(true);
fontConfig.setFontDataOwnedByAtlas(false);
fontConfig.setGlyphRanges(fontAtlas.getGlyphRangesDefault());
defaultFont = fontAtlas.addFontFromMemoryTTF(loadBytesFromResources("/fonts/Roboto-Medium.ttf"), 5, fontConfig);
fontAtlas.build();
fontConfig.destroy();
}
/*
* METHODS - RUNNING
*/
public void processFrame() {
startFrame();
drawWindow();
endFrame();
}
private void startFrame() {
GLFW.glfwMakeContextCurrent(windowHandle);
GL.setCapabilities(capabilities);
GL32.glClearColor(colorBg.getRed(), colorBg.getGreen(), colorBg.getBlue(), colorBg.getAlpha());
GL32.glClear(GL32.GL_COLOR_BUFFER_BIT | GL32.GL_DEPTH_BUFFER_BIT);
imGuiGlfw.newFrame();
ImGui.newFrame();
ImGui.pushFont(defaultFont);
}
private void endFrame() {
ImGui.popFont();
ImGui.render();
imGuiGl3.renderDrawData(ImGui.getDrawData());
if (ImGui.getIO().hasConfigFlags(ImGuiConfigFlags.ViewportsEnable)) {
final long backupWindowPtr = GLFW.glfwGetCurrentContext();
ImGui.updatePlatformWindows();
ImGui.renderPlatformWindowsDefault();
GLFW.glfwMakeContextCurrent(backupWindowPtr);
}
glfwPollEvents();
glfwSwapBuffers(windowHandle);
}
private void drawWindow() {
if(ImGui.begin("Window")) {
if(ImGui.button("hello")) {
}
ImGui.end();
}
}
/*
* CONSTRUCTOR
*/
public Main() {
}} `
Version
1.86.11
What happened?
When trying to add fonts, I noticed that no matter what file I loaded from memory or file made every texture appear pure black in OpenGL. After some testing, I determined that even when I set the textureID on the font, it still renders as ID 0.
I'm on Windows, 64-bit, with an NVIDIA 3080 GPU.
The font code is below.
Reproduction
I loaded different fonts using a few different calls and determined the texture ID did not change.
Relevant log output
No response