private final class CanvasThread extends Thread {
final LTimerContext timerContext = new LTimerContext();
final SystemTimer timer = LSystem.getSystemTimer();
private long lastTimeMicros,
currTimeMicros,
goalTimeMicros,
elapsedTimeMicros,
remainderMicros,
elapsedTime,
frameCount,
frames;
public CanvasThread() {
isRunning = true;
setName("CanvasThread");
}
synchronized void updateCapture(final Bitmap bit) {
if (!handler.next()) {
return;
}
handler.calls();
handler.runTimer(timerContext);
if (LSystem.AUTO_REPAINT) {
canvas = surfaceHolder.lockCanvas(null);
if (canvas == null) {
return;
}
synchronized (surfaceHolder) {
gl.update(bit);
repaintMode = handler.getRepaintMode();
switch (repaintMode) {
case Screen.SCREEN_BITMAP_REPAINT:
gl.drawBitmap(handler.getBackground(), 0, 0);
break;
case Screen.SCREEN_CANVAS_REPAINT:
gl.drawClear();
break;
case Screen.SCREEN_NOT_REPAINT:
break;
default:
gl.drawBitmap(
handler.getBackground(),
repaintMode / 2 - LSystem.random.nextInt(repaintMode),
repaintMode / 2 - LSystem.random.nextInt(repaintMode));
break;
}
handler.draw(gl);
if (isFPS) {
tickFrames();
gl.setFont(fpsFont);
gl.setColor(LColor.white);
gl.drawString("FPS:" + curFPS, 5, 20);
}
if (isMemory) {
Runtime runtime = Runtime.getRuntime();
long totalMemory = runtime.totalMemory();
long currentMemory = totalMemory - runtime.freeMemory();
String memory =
((float) ((currentMemory * 10) >> 20) / 10)
+ " of "
+ ((float) ((totalMemory * 10) >> 20) / 10)
+ " MB";
gl.setFont(fpsFont);
gl.setColor(LColor.white);
gl.drawString("MEMORY:" + memory, 5, 45);
}
if (emulatorButtons != null) {
emulatorButtons.draw(gl);
}
}
surfaceHolder.unlockCanvasAndPost(canvas);
}
}
/** 游戏窗体主循环 */
public void run() {
boolean isScale = handler.isScale();
Thread currentThread = Thread.currentThread();
int restoreCount = 0;
try {
do {
if (LSystem.isPaused || !isFocusable()) {
pause(500);
lastTimeMicros = timer.getTimeMicros();
elapsedTime = 0;
remainderMicros = 0;
continue;
}
if (!handler.next()) {
continue;
}
handler.calls();
goalTimeMicros = lastTimeMicros + 1000000L / maxFrames;
currTimeMicros = timer.sleepTimeMicros(goalTimeMicros);
elapsedTimeMicros = currTimeMicros - lastTimeMicros + remainderMicros;
elapsedTime = Math.max(0, (int) (elapsedTimeMicros / 1000));
remainderMicros = elapsedTimeMicros - elapsedTime * 1000;
lastTimeMicros = currTimeMicros;
timerContext.millisSleepTime = remainderMicros;
timerContext.timeSinceLastUpdate = elapsedTime;
handler.runTimer(timerContext);
if (LSystem.AUTO_REPAINT) {
canvas = surfaceHolder.lockCanvas(null);
if (canvas == null) {
continue;
}
synchronized (surfaceHolder) {
if (isScale) {
canvas.setDrawFilter(zoomFilter);
canvas.scale(LSystem.scaleWidth, LSystem.scaleHeight);
restoreCount = canvas.save();
}
gl.update(canvas);
repaintMode = handler.getRepaintMode();
switch (repaintMode) {
case Screen.SCREEN_BITMAP_REPAINT:
if (handler.getX() == 0 && handler.getY() == 0) {
gl.drawBitmap(handler.getBackground(), 0, 0);
} else {
gl.drawClear();
gl.drawBitmap(handler.getBackground(), handler.getX(), handler.getY());
}
break;
case Screen.SCREEN_CANVAS_REPAINT:
gl.drawClear();
break;
case Screen.SCREEN_NOT_REPAINT:
break;
default:
if (handler.getX() == 0 && handler.getY() == 0) {
gl.drawBitmap(
handler.getBackground(),
repaintMode / 2 - LSystem.random.nextInt(repaintMode),
repaintMode / 2 - LSystem.random.nextInt(repaintMode));
} else {
gl.drawClear();
gl.drawBitmap(
handler.getBackground(),
handler.getX() + repaintMode / 2 - LSystem.random.nextInt(repaintMode),
handler.getY() + repaintMode / 2 - LSystem.random.nextInt(repaintMode));
}
break;
}
handler.draw(gl);
if (isFPS) {
tickFrames();
gl.setFont(fpsFont);
gl.setColor(LColor.white);
gl.drawString("FPS:" + curFPS, 5, 20);
}
if (isMemory) {
Runtime runtime = Runtime.getRuntime();
long totalMemory = runtime.totalMemory();
long currentMemory = totalMemory - runtime.freeMemory();
String memory =
((float) ((currentMemory * 10) >> 20) / 10)
+ " of "
+ ((float) ((totalMemory * 10) >> 20) / 10)
+ " MB";
gl.setFont(fpsFont);
gl.setColor(LColor.white);
gl.drawString("MEMORY:" + memory, 5, 45);
}
if (emulatorButtons != null) {
emulatorButtons.draw(gl);
}
if (isScale) {
canvas.restoreToCount(restoreCount);
}
}
surfaceHolder.unlockCanvasAndPost(canvas);
}
} while (isRunning && mainLoop == currentThread);
} catch (Exception ex) {
Log.d("Android2DView", "LGame 2D View Error :", ex);
} finally {
destroyView();
}
}
private final void pause(long sleep) {
try {
Thread.sleep(sleep);
} catch (InterruptedException ex) {
}
}
private void tickFrames() {
long time = System.currentTimeMillis();
if (time - frameCount > 1000L) {
curFPS = Math.min(maxFrames, frames);
frames = 0;
frameCount = time;
}
frames++;
}
}
