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package org.mozilla.gecko.gfx;
import android.opengl.GLSurfaceView;
import java.util.concurrent.LinkedBlockingQueue;
import javax.microedition.khronos.opengles.GL10;
/**
* Thread which controls the rendering to OpenGL context. Render commands are queued and
* processed and delegated by this thread.
*/
public class RenderControllerThread extends Thread implements LayerView.Listener {
private LinkedBlockingQueue<RenderCommand> queue = new LinkedBlockingQueue<RenderCommand>();
private GLController controller;
private boolean renderQueued = false;
private int width;
private int height;
public RenderControllerThread(GLController controller) {
this.controller = controller;
}
@Override
public void run() {
while (true) {
RenderCommand command;
try {
command = queue.take();
execute(command);
if (command == RenderCommand.SHUTDOWN) {
return;
}
} catch (InterruptedException exception) {
throw new RuntimeException(exception);
}
}
}
void execute(RenderCommand command) {
switch (command) {
case SHUTDOWN:
doShutdown();
break;
case RENDER_FRAME:
doRenderFrame();
break;
case SIZE_CHANGED:
doSizeChanged();
break;
case SURFACE_CREATED:
doSurfaceCreated();
break;
case SURFACE_DESTROYED:
doSurfaceDestroyed();
break;
}
}
public void shutdown() {
queue.add(RenderCommand.SHUTDOWN);
}
@Override
public void compositorCreated() {
}
@Override
public void renderRequested() {
synchronized (this) {
if (!renderQueued) {
queue.add(RenderCommand.RENDER_FRAME);
renderQueued = true;
}
}
}
@Override
public void compositionPauseRequested() {
queue.add(RenderCommand.SURFACE_DESTROYED);
}
@Override
public void compositionResumeRequested(int width, int height) {
}
@Override
public void surfaceChanged(int width, int height) {
this.width = width;
this.height = height;
queue.add(RenderCommand.SIZE_CHANGED);
}
public void surfaceCreated() {
queue.add(RenderCommand.SURFACE_CREATED);
}
private GLSurfaceView.Renderer getRenderer() {
return controller.getView().getRenderer();
}
private void doShutdown() {
controller.disposeGLContext();
controller = null;
}
private void doRenderFrame() {
synchronized (this) {
renderQueued = false;
}
if (controller.getEGLSurface() == null) {
return;
}
GLSurfaceView.Renderer renderer = getRenderer();
if (renderer != null) {
renderer.onDrawFrame((GL10) controller.getGL());
}
controller.swapBuffers();
}
private void doSizeChanged() {
GLSurfaceView.Renderer renderer = getRenderer();
if (renderer != null) {
renderer.onSurfaceChanged((GL10) controller.getGL(), width, height);
}
}
private void doSurfaceCreated() {
if (!controller.hasSurface()) {
controller.initGLContext();
}
}
private void doSurfaceDestroyed() {
controller.disposeGLContext();
}
public enum RenderCommand {
SHUTDOWN,
RECREATE_SURFACE,
RENDER_FRAME,
SIZE_CHANGED,
SURFACE_CREATED,
SURFACE_DESTROYED,
}
}
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