Better backend for hardware layers.
With this new backend, a hardware layer is only recreated when
its associated view is udpated. This offers fast composition
in GL and fast update of the layer in GL as well.
Change-Id: I97c43a612f5955c6bf1c192c8ca4af10fdf1d076
diff --git a/libs/hwui/LayerRenderer.h b/libs/hwui/LayerRenderer.h
new file mode 100644
index 0000000..a8f1ff7
--- /dev/null
+++ b/libs/hwui/LayerRenderer.h
@@ -0,0 +1,55 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef ANDROID_HWUI_LAYER_RENDERER_H
+#define ANDROID_HWUI_LAYER_RENDERER_H
+
+#include "OpenGLRenderer.h"
+
+namespace android {
+namespace uirenderer {
+
+///////////////////////////////////////////////////////////////////////////////
+// Renderer
+///////////////////////////////////////////////////////////////////////////////
+
+class LayerRenderer: public OpenGLRenderer {
+public:
+ LayerRenderer(GLuint fbo): mFbo(fbo) {
+ }
+
+ ~LayerRenderer() {
+ }
+
+ void prepare(bool opaque);
+ void finish();
+
+ static GLuint createLayer(uint32_t width, uint32_t height,
+ uint32_t* layerWidth, uint32_t* layerHeight, GLuint* texture);
+ static void resizeLayer(GLuint fbo, GLuint texture, uint32_t width, uint32_t height,
+ uint32_t* layerWidth, uint32_t* layerHeight);
+ static void destroyLayer(GLuint fbo, GLuint texture);
+
+private:
+ GLuint mFbo;
+ GLuint mPreviousFbo;
+
+}; // class LayerRenderer
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_HWUI_LAYER_RENDERER_H