Initial Contribution
diff --git a/libs/surfaceflinger/Transform.h b/libs/surfaceflinger/Transform.h
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+++ b/libs/surfaceflinger/Transform.h
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+/*
+ * Copyright (C) 2007 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_TRANSFORM_H
+#define ANDROID_TRANSFORM_H
+
+#include <stdint.h>
+#include <sys/types.h>
+
+#include <ui/Point.h>
+#include <ui/Rect.h>
+
+#include <GLES/gl.h>
+
+#include <corecg/SkMatrix.h>
+
+namespace android {
+
+class Region;
+
+// ---------------------------------------------------------------------------
+
+class Transform
+{
+public:
+ Transform();
+ Transform(const Transform& other);
+ ~Transform();
+
+ enum orientation_flags {
+ ROT_0 = 0x00000000,
+ FLIP_H = 0x00000001,
+ FLIP_V = 0x00000002,
+ ROT_90 = 0x00000004,
+ ROT_180 = FLIP_H|FLIP_V,
+ ROT_270 = ROT_180|ROT_90,
+ ROT_INVALID = 0x80000000
+ };
+
+ bool transformed() const;
+ int32_t getOrientation() const;
+ bool preserveRects() const;
+
+ int tx() const;
+ int ty() const;
+
+ void reset();
+ void set(float xx, float xy, float yx, float yy);
+ void set(int tx, int ty);
+
+ Rect makeBounds(int w, int h) const;
+ void transform(GLfixed* point, int x, int y) const;
+ Region transform(const Region& reg) const;
+ Rect transform(const Rect& bounds) const;
+
+ Transform operator * (const Transform& rhs) const;
+ float operator [] (int i) const;
+
+ inline uint32_t getType() const { return type(); }
+
+ inline Transform(bool) : mType(0xFF) { };
+
+private:
+ uint8_t type() const;
+
+private:
+ SkMatrix mTransform;
+ mutable uint32_t mType;
+};
+
+// ---------------------------------------------------------------------------
+}; // namespace android
+
+#endif /* ANDROID_TRANSFORM_H */