Add hooks for drawBitmap().

Change-Id: I58e962c3a8b2bc75c2605fe369ad3002579d86e0

Add texture cache.

Change-Id: I1c0e5581d228869e114438258a1014e33e024ad7
diff --git a/libs/hwui/Texture.h b/libs/hwui/Texture.h
new file mode 100644
index 0000000..b3b17ca
--- /dev/null
+++ b/libs/hwui/Texture.h
@@ -0,0 +1,50 @@
+/*
+ * Copyright (C) 2010 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_UI_TEXTURE_H
+#define ANDROID_UI_TEXTURE_H
+
+#include <GLES2/gl2.h>
+
+namespace android {
+namespace uirenderer {
+
+/**
+ * Represents an OpenGL texture.
+ */
+struct Texture {
+    /**
+     * Name of the texture.
+     */
+    GLuint id;
+    /**
+     * Indicates whether the texture requires blending.
+     */
+    bool blend;
+    /**
+     * Width of the backing bitmap.
+     */
+    unsigned int width;
+    /**
+     * Height of the backing bitmap.
+     */
+    unsigned int height;
+}; // struct Texture
+
+}; // namespace uirenderer
+}; // namespace android
+
+#endif // ANDROID_UI_TEXTURE_H