1 files changed, 129 insertions, 0 deletions
diff --git a/services/input/PointerController.h b/services/input/PointerController.h
new file mode 100644
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+++ b/services/input/PointerController.h
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+/*
+ * 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 _UI_POINTER_CONTROLLER_H
+#define _UI_POINTER_CONTROLLER_H
+
+#include <ui/DisplayInfo.h>
+#include <utils/RefBase.h>
+#include <utils/String8.h>
+
+#include <surfaceflinger/Surface.h>
+#include <surfaceflinger/SurfaceComposerClient.h>
+#include <surfaceflinger/ISurfaceComposer.h>
+
+#include <SkBitmap.h>
+
+namespace android {
+
+enum {
+    POINTER_BUTTON_1 = 1 << 0,
+};
+
+/**
+ * Interface for tracking a single (mouse) pointer.
+ *
+ * The pointer controller is responsible for providing synchronization and for tracking
+ * display orientation changes if needed.
+ */
+class PointerControllerInterface : public virtual RefBase {
+protected:
+    PointerControllerInterface() { }
+    virtual ~PointerControllerInterface() { }
+
+public:
+    /* Gets the bounds of the region that the pointer can traverse.
+     * Returns true if the bounds are available. */
+    virtual bool getBounds(float* outMinX, float* outMinY,
+            float* outMaxX, float* outMaxY) const = 0;
+
+    /* Move the pointer. */
+    virtual void move(float deltaX, float deltaY) = 0;
+
+    /* Sets a mask that indicates which buttons are pressed. */
+    virtual void setButtonState(uint32_t buttonState) = 0;
+
+    /* Gets a mask that indicates which buttons are pressed. */
+    virtual uint32_t getButtonState() const = 0;
+
+    /* Sets the absolute location of the pointer. */
+    virtual void setPosition(float x, float y) = 0;
+
+    /* Gets the absolute location of the pointer. */
+    virtual void getPosition(float* outX, float* outY) const = 0;
+};
+
+
+/*
+ * Tracks pointer movements and draws the pointer sprite to a surface.
+ *
+ * Handles pointer acceleration and animation.
+ */
+class PointerController : public PointerControllerInterface {
+protected:
+    virtual ~PointerController();
+
+public:
+    PointerController(int32_t pointerLayer);
+
+    virtual bool getBounds(float* outMinX, float* outMinY,
+            float* outMaxX, float* outMaxY) const;
+    virtual void move(float deltaX, float deltaY);
+    virtual void setButtonState(uint32_t buttonState);
+    virtual uint32_t getButtonState() const;
+    virtual void setPosition(float x, float y);
+    virtual void getPosition(float* outX, float* outY) const;
+
+    void setDisplaySize(int32_t width, int32_t height);
+    void setDisplayOrientation(int32_t orientation);
+    void setPointerIcon(const SkBitmap* bitmap, float hotSpotX, float hotSpotY);
+
+private:
+    mutable Mutex mLock;
+
+    int32_t mPointerLayer;
+    sp<SurfaceComposerClient> mSurfaceComposerClient;
+    sp<SurfaceControl> mSurfaceControl;
+
+    struct Locked {
+        int32_t displayWidth;
+        int32_t displayHeight;
+        int32_t displayOrientation;
+
+        float pointerX;
+        float pointerY;
+        uint32_t buttonState;
+
+        SkBitmap* iconBitmap;
+        float iconHotSpotX;
+        float iconHotSpotY;
+
+        bool wantVisible;
+        bool visible;
+        bool drawn;
+    } mLocked;
+
+    bool getBoundsLocked(float* outMinX, float* outMinY, float* outMaxX, float* outMaxY) const;
+    void setPositionLocked(float x, float y);
+    void updateLocked();
+    bool createSurfaceIfNeededLocked();
+    bool drawPointerIfNeededLocked();
+    bool resizeSurfaceLocked(int32_t width, int32_t height);
+};
+
+} // namespace android
+
+#endif // _UI_POINTER_CONTROLLER_H