1 files changed, 148 insertions, 0 deletions
diff --git a/android/source/src/java/org/mozilla/gecko/gfx/RenderControllerThread.java b/android/source/src/java/org/mozilla/gecko/gfx/RenderControllerThread.java
new file mode 100644
index 000000000..06f82f158
--- /dev/null
+++ b/android/source/src/java/org/mozilla/gecko/gfx/RenderControllerThread.java
@@ -0,0 +1,148 @@
+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,
+    }
+}