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package processing.webgpu;
import org.lwjgl.glfw.*;
import org.lwjgl.system.MemoryUtil;
import org.lwjgl.system.Platform;
import processing.core.PApplet;
import processing.core.PConstants;
import processing.core.PGraphics;
import processing.core.PImage;
import processing.core.PSurface;
import processing.event.Event;
import processing.event.KeyEvent;
import processing.event.MouseEvent;
import java.io.File;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.concurrent.locks.Condition;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReentrantLock;
public class PSurfaceGLFW implements PSurface {
protected PApplet sketch;
protected PGraphics graphics;
protected long window;
protected long display;
protected boolean running = false;
protected boolean paused;
private final Lock pauseLock = new ReentrantLock();
private final Condition pauseCondition = pauseLock.newCondition();
protected float frameRateTarget = 60;
protected long frameRatePeriod = 1000000000L / 60L;
private static final AtomicInteger windowCount = new AtomicInteger(0);
private static AtomicBoolean glfwInitialized = new AtomicBoolean(false);
private GLFWFramebufferSizeCallback framebufferSizeCallback;
private GLFWWindowPosCallback windowPosCallback;
private GLFWCursorPosCallback cursorPosCallback;
private GLFWMouseButtonCallback mouseButtonCallback;
private GLFWScrollCallback scrollCallback;
private GLFWKeyCallback keyCallback;
private GLFWCharCallback charCallback;
private GLFWCursorEnterCallback cursorEnterCallback;
private GLFWWindowFocusCallback windowFocusCallback;
private double lastCursorX;
private double lastCursorY;
private int currentMouseButton;
private int currentModifiers;
// Cursor callbacks fire from inside glfwPollEvents and must do no FFI
// or allocation, or a high-poll-rate mouse can refill events faster
// than glfwPollEvents drains. Buffer the raw (x, y) here and replay
// them in runDrawLoop after polling returns.
private double[] cursorXs = new double[256];
private double[] cursorYs = new double[256];
private int cursorCount;
public PSurfaceGLFW(PGraphics graphics) {
this.graphics = graphics;
}
@Override
public void initOffscreen(PApplet sketch) {
throw new IllegalStateException("PSurfaceGLFW does not support offscreen rendering");
}
@Override
public void initFrame(PApplet sketch) {
this.sketch = sketch;
if (glfwInitialized.compareAndSet(false, true)) {
GLFWErrorCallback.createPrint(System.err).set();
if (!GLFW.glfwInit()) {
glfwInitialized.set(false);
throw new IllegalStateException("Failed to initialize GLFW");
}
System.out.println("PSurfaceGLFW: GLFW initialized successfully");
}
GLFW.glfwDefaultWindowHints();
GLFW.glfwWindowHint(GLFW.GLFW_CLIENT_API, GLFW.GLFW_NO_API);
GLFW.glfwWindowHint(GLFW.GLFW_VISIBLE, GLFW.GLFW_FALSE);
GLFW.glfwWindowHint(GLFW.GLFW_RESIZABLE, GLFW.GLFW_FALSE);
window = GLFW.glfwCreateWindow(sketch.sketchWidth(), sketch.sketchHeight(), "Processing",
MemoryUtil.NULL, MemoryUtil.NULL);
if (window == MemoryUtil.NULL) {
throw new RuntimeException("Failed to create GLFW window");
}
display = GLFW.glfwGetPrimaryMonitor();
windowCount.incrementAndGet();
initListeners();
if (graphics instanceof PGraphicsWebGPU webgpu) {
PWebGPU.init();
long windowHandle = getWindowHandle();
long displayHandle = getDisplayHandle();
int width = sketch.sketchWidth();
int height = sketch.sketchHeight();
float scaleFactor = sketch.sketchPixelDensity();
webgpu.initWebGPUSurface(windowHandle, displayHandle, width, height, scaleFactor);
}
}
protected void initListeners() {
long surfaceId = getSurfaceId();
// glfwSet*Callback returns the *previous* callback, not the new one.
// The new wrapper must be held in a field or it will be GC'd while
// still registered with native GLFW and events will silently stop.
framebufferSizeCallback = GLFWFramebufferSizeCallback.create((win, w, h) -> {
if (sketch != null) sketch.postWindowResized(w, h);
});
GLFW.glfwSetFramebufferSizeCallback(window, framebufferSizeCallback);
windowPosCallback = GLFWWindowPosCallback.create((win, xpos, ypos) -> {
if (sketch != null) sketch.postWindowMoved(xpos, ypos);
});
GLFW.glfwSetWindowPosCallback(window, windowPosCallback);
cursorPosCallback = GLFWCursorPosCallback.create((win, xpos, ypos) -> {
int n = cursorCount;
if (n >= cursorXs.length) {
int newLen = cursorXs.length * 2;
double[] nx = new double[newLen];
double[] ny = new double[newLen];
System.arraycopy(cursorXs, 0, nx, 0, n);
System.arraycopy(cursorYs, 0, ny, 0, n);
cursorXs = nx;
cursorYs = ny;
}
cursorXs[n] = xpos;
cursorYs[n] = ypos;
cursorCount = n + 1;
lastCursorX = xpos;
lastCursorY = ypos;
});
GLFW.glfwSetCursorPosCallback(window, cursorPosCallback);
mouseButtonCallback = GLFWMouseButtonCallback.create((win, button, action, mods) -> {
int peButton = switch (button) {
case GLFW.GLFW_MOUSE_BUTTON_LEFT -> PConstants.LEFT;
case GLFW.GLFW_MOUSE_BUTTON_MIDDLE -> PConstants.CENTER;
case GLFW.GLFW_MOUSE_BUTTON_RIGHT -> PConstants.RIGHT;
default -> 0;
};
currentModifiers = glfwModsToProcessing(mods);
boolean pressed = (action == GLFW.GLFW_PRESS);
if (surfaceId != 0 && peButton != 0) {
byte btn = (byte) (peButton == PConstants.LEFT ? 0
: peButton == PConstants.CENTER ? 1 : 2);
PWebGPU.inputMouseButton(surfaceId, btn, pressed);
}
if (peButton != 0) {
if (pressed) currentMouseButton = peButton;
if (sketch != null) {
int peAction = pressed ? MouseEvent.PRESS : MouseEvent.RELEASE;
sketch.postEvent(new MouseEvent(null, System.currentTimeMillis(),
peAction, currentModifiers,
(int) lastCursorX, (int) lastCursorY, peButton, 1));
}
if (!pressed) currentMouseButton = 0;
}
});
GLFW.glfwSetMouseButtonCallback(window, mouseButtonCallback);
scrollCallback = GLFWScrollCallback.create((win, xoffset, yoffset) -> {
if (surfaceId != 0) {
PWebGPU.inputScroll(surfaceId, (float) xoffset, (float) yoffset);
}
if (sketch != null) {
// Flip: Processing wheel is negative-up, GLFW is positive-up.
sketch.postEvent(new MouseEvent(null, System.currentTimeMillis(),
MouseEvent.WHEEL, currentModifiers,
(int) lastCursorX, (int) lastCursorY, 0,
(int) -yoffset));
}
});
GLFW.glfwSetScrollCallback(window, scrollCallback);
keyCallback = GLFWKeyCallback.create((win, key, scancode, action, mods) -> {
currentModifiers = glfwModsToProcessing(mods);
if (surfaceId != 0 && action != GLFW.GLFW_REPEAT) {
PWebGPU.inputKey(surfaceId, key, action == GLFW.GLFW_PRESS);
}
if (sketch != null && action != GLFW.GLFW_REPEAT) {
int peAction = (action == GLFW.GLFW_PRESS) ? KeyEvent.PRESS : KeyEvent.RELEASE;
sketch.postEvent(new KeyEvent(null, System.currentTimeMillis(),
peAction, currentModifiers,
glfwKeyToChar(key), key));
}
});
GLFW.glfwSetKeyCallback(window, keyCallback);
charCallback = GLFWCharCallback.create((win, codepoint) -> {
if (surfaceId != 0) {
PWebGPU.inputChar(surfaceId, 0, codepoint);
}
if (sketch != null) {
sketch.postEvent(new KeyEvent(null, System.currentTimeMillis(),
KeyEvent.TYPE, currentModifiers,
(char) codepoint, 0));
}
});
GLFW.glfwSetCharCallback(window, charCallback);
cursorEnterCallback = GLFWCursorEnterCallback.create((win, entered) -> {
if (surfaceId != 0) {
if (entered) PWebGPU.inputCursorEnter(surfaceId);
else PWebGPU.inputCursorLeave(surfaceId);
}
});
GLFW.glfwSetCursorEnterCallback(window, cursorEnterCallback);
windowFocusCallback = GLFWWindowFocusCallback.create((win, focused) -> {
if (surfaceId != 0) PWebGPU.inputFocus(surfaceId, focused);
});
GLFW.glfwSetWindowFocusCallback(window, windowFocusCallback);
}
private static int glfwModsToProcessing(int mods) {
int m = 0;
if ((mods & GLFW.GLFW_MOD_SHIFT) != 0) m |= Event.SHIFT;
if ((mods & GLFW.GLFW_MOD_CONTROL) != 0) m |= Event.CTRL;
if ((mods & GLFW.GLFW_MOD_ALT) != 0) m |= Event.ALT;
if ((mods & GLFW.GLFW_MOD_SUPER) != 0) m |= Event.META;
return m;
}
private static char glfwKeyToChar(int glfwKey) {
if (glfwKey >= 32 && glfwKey < 127) {
return (char) glfwKey;
}
return switch (glfwKey) {
case GLFW.GLFW_KEY_ENTER, GLFW.GLFW_KEY_KP_ENTER -> '\n';
case GLFW.GLFW_KEY_TAB -> '\t';
case GLFW.GLFW_KEY_BACKSPACE -> '\b';
case GLFW.GLFW_KEY_ESCAPE -> 27;
case GLFW.GLFW_KEY_DELETE -> 127;
default -> PConstants.CODED;
};
}
private long getSurfaceId() {
if (graphics instanceof PGraphicsWebGPU webgpu) {
return webgpu.getSurfaceId();
}
return 0;
}
@Override
public Object getNative() {
return window;
}
public long getWindowHandle() {
if (Platform.get() == Platform.MACOSX) {
return GLFWNativeCocoa.glfwGetCocoaWindow(window);
} else if (Platform.get() == Platform.WINDOWS) {
return GLFWNativeWin32.glfwGetWin32Window(window);
} else if (Platform.get() == Platform.LINUX) {
// TODO: need to check if x11 or wayland
return GLFWNativeWayland.glfwGetWaylandWindow(window);
} else {
throw new UnsupportedOperationException("Window handle retrieval not implemented for this platform");
}
}
public long getDisplayHandle() {
if (Platform.get() == Platform.MACOSX) {
return 0;
} else if (Platform.get() == Platform.WINDOWS) {
return 0;
} else if (Platform.get() == Platform.LINUX) {
// TODO: need to check if x11 or wayland
return GLFWNativeWayland.glfwGetWaylandDisplay();
} else {
throw new UnsupportedOperationException("Window handle retrieval not implemented for this platform");
}
}
@Override
public void setTitle(String title) {
if (window != MemoryUtil.NULL) {
GLFW.glfwSetWindowTitle(window, title);
}
}
@Override
public void setVisible(boolean visible) {
if (window != MemoryUtil.NULL) {
if (visible) {
GLFW.glfwShowWindow(window);
} else {
GLFW.glfwHideWindow(window);
}
}
}
@Override
public void setResizable(boolean resizable) {
if (window != MemoryUtil.NULL) {
GLFW.glfwSetWindowAttrib(window, GLFW.GLFW_RESIZABLE,
resizable ? GLFW.GLFW_TRUE : GLFW.GLFW_FALSE);
}
}
@Override
public void setAlwaysOnTop(boolean always) {
if (window != MemoryUtil.NULL) {
GLFW.glfwSetWindowAttrib(window, GLFW.GLFW_FLOATING,
always ? GLFW.GLFW_TRUE : GLFW.GLFW_FALSE);
}
}
@Override
public void setIcon(PImage icon) {
// TODO: set icon with glfw
}
@Override
public void placeWindow(int[] location, int[] editorLocation) {
if (window == MemoryUtil.NULL) return;
int x, y;
if (location != null) {
x = location[0];
y = location[1];
} else if (editorLocation != null) {
x = editorLocation[0] - 20;
y = editorLocation[1];
if (x - sketch.sketchWidth() < 10) {
long monitor = GLFW.glfwGetPrimaryMonitor();
var vidmode = GLFW.glfwGetVideoMode(monitor);
if (vidmode != null) {
x = (vidmode.width() - sketch.sketchWidth()) / 2;
y = (vidmode.height() - sketch.sketchHeight()) / 2;
} else {
x = 100;
y = 100;
}
}
} else {
long monitor = GLFW.glfwGetPrimaryMonitor();
var vidmode = GLFW.glfwGetVideoMode(monitor);
if (vidmode != null) {
x = (vidmode.width() - sketch.sketchWidth()) / 2;
y = (vidmode.height() - sketch.sketchHeight()) / 2;
} else {
x = 100;
y = 100;
}
}
GLFW.glfwSetWindowPos(window, x, y);
}
@Override
public void placePresent(int stopColor) {
// TODO: implement present mode support
}
@Override
public void setLocation(int x, int y) {
if (window != MemoryUtil.NULL) {
GLFW.glfwSetWindowPos(window, x, y);
}
}
@Override
public void setSize(int width, int height) {
if (width == sketch.width && height == sketch.height) {
return;
}
sketch.width = width;
sketch.height = height;
graphics.setSize(width, height);
if (window != MemoryUtil.NULL) {
GLFW.glfwSetWindowSize(window, width, height);
}
}
@Override
public void setFrameRate(float fps) {
frameRateTarget = fps;
frameRatePeriod = (long) (1000000000.0 / frameRateTarget);
}
@Override
public void setCursor(int kind) {
// TODO: implement cursor types
}
@Override
public void setCursor(PImage image, int hotspotX, int hotspotY) {
// TODO: implement custom cursor
}
@Override
public void showCursor() {
if (window != MemoryUtil.NULL) {
GLFW.glfwSetInputMode(window, GLFW.GLFW_CURSOR, GLFW.GLFW_CURSOR_NORMAL);
}
}
@Override
public void hideCursor() {
if (window != MemoryUtil.NULL) {
GLFW.glfwSetInputMode(window, GLFW.GLFW_CURSOR, GLFW.GLFW_CURSOR_HIDDEN);
}
}
@Override
public PImage loadImage(String path, Object... args) {
// TODO: implement image loading without awt
throw new UnsupportedOperationException("Image loading not yet implemented for WebGPU");
}
@Override
public boolean openLink(String url) {
// TODO: implement links without awt
return false;
}
@Override
public void selectInput(String prompt, String callback, File file, Object callbackObject) {
throw new UnsupportedOperationException("File dialogs not yet implemented for WebGPU");
}
@Override
public void selectOutput(String prompt, String callback, File file, Object callbackObject) {
throw new UnsupportedOperationException("File dialogs not yet implemented for WebGPU");
}
@Override
public void selectFolder(String prompt, String callback, File file, Object callbackObject) {
throw new UnsupportedOperationException("Folder selection not yet implemented for WebGPU");
}
@Override
public void startThread() {
if (running) {
throw new IllegalStateException("Draw loop already running");
}
running = true;
runDrawLoop();
}
protected void runDrawLoop() {
GLFW.glfwShowWindow(window);
// macOS: when the JVM is launched as a child of another GUI process,
// NSApplication isn't activated and input events stop after a brief
// initial spurt unless we force focus.
GLFW.glfwFocusWindow(window);
long beforeTime = System.nanoTime();
long overSleepTime = 0L;
sketch.start();
while (running) {
checkPause();
GLFW.glfwPollEvents();
if (GLFW.glfwWindowShouldClose(window)) {
sketch.exit();
break;
}
int n = cursorCount;
if (n > 0) {
long sid = getSurfaceId();
long now = System.currentTimeMillis();
for (int i = 0; i < n; i++) {
float x = (float) cursorXs[i];
float y = (float) cursorYs[i];
if (sid != 0) {
PWebGPU.inputMouseMove(sid, x, y);
}
if (sketch != null) {
int action = (currentMouseButton == 0) ? MouseEvent.MOVE : MouseEvent.DRAG;
sketch.postEvent(new MouseEvent(null, now, action, currentModifiers,
(int) x, (int) y, currentMouseButton, 0));
}
}
cursorCount = 0;
}
PWebGPU.inputFlush();
if (!sketch.finished) {
sketch.handleDraw();
}
long afterTime = System.nanoTime();
long timeDiff = afterTime - beforeTime;
long sleepTime = (frameRatePeriod - timeDiff) - overSleepTime;
if (sleepTime > 0) {
try {
Thread.sleep(sleepTime / 1000000L, (int) (sleepTime % 1000000L));
} catch (InterruptedException ex) {
Thread.currentThread().interrupt();
}
overSleepTime = (System.nanoTime() - afterTime) - sleepTime;
} else {
overSleepTime = 0L;
}
beforeTime = System.nanoTime();
}
sketch.dispose();
}
@Override
public void pauseThread() {
paused = true;
}
protected void checkPause() {
if (paused) {
pauseLock.lock();
try {
while (paused) {
pauseCondition.await();
}
} catch (InterruptedException e) {
Thread.currentThread().interrupt();
} finally {
pauseLock.unlock();
}
}
}
@Override
public void resumeThread() {
pauseLock.lock();
try {
paused = false;
pauseCondition.signalAll();
} finally {
pauseLock.unlock();
}
}
@Override
public boolean stopThread() {
if (!running) {
return false;
}
running = false;
try {
if (window != MemoryUtil.NULL) {
GLFW.glfwDestroyWindow(window);
window = MemoryUtil.NULL;
if (windowCount.decrementAndGet() == 0) {
if (glfwInitialized.compareAndSet(true, false)) {
GLFW.glfwTerminate();
System.out.println("PSurfaceGLFW: GLFW terminated");
}
}
}
} finally {
freeCallbacks();
}
return true;
}
private void freeCallbacks() {
if (framebufferSizeCallback != null) {
framebufferSizeCallback.free();
framebufferSizeCallback = null;
}
if (windowPosCallback != null) {
windowPosCallback.free();
windowPosCallback = null;
}
if (cursorPosCallback != null) {
cursorPosCallback.free();
cursorPosCallback = null;
}
if (mouseButtonCallback != null) {
mouseButtonCallback.free();
mouseButtonCallback = null;
}
if (scrollCallback != null) {
scrollCallback.free();
scrollCallback = null;
}
if (keyCallback != null) {
keyCallback.free();
keyCallback = null;
}
if (charCallback != null) {
charCallback.free();
charCallback = null;
}
if (cursorEnterCallback != null) {
cursorEnterCallback.free();
cursorEnterCallback = null;
}
if (windowFocusCallback != null) {
windowFocusCallback.free();
windowFocusCallback = null;
}
}
@Override
public boolean isStopped() {
return !running;
}
}