Isolate SpriteIcon into its own file.

This is to isolate differences between internal master and AOSP so that
the open source intern can work on a relatively new project.

It also isolates a divergent piece of code into SpriteIcon.cpp.

Bug: None
Test: Pointer icons in ApiDemos still work.
Change-Id: I1bf8f23411ad7170de2497d6fee0f70b015e9b5f
Merged-In: I1bf8f23411ad7170de2497d6fee0f70b015e9b5f
diff --git a/libs/input/SpriteController.h b/libs/input/SpriteController.h
index 79a904f..137b564 100644
--- a/libs/input/SpriteController.h
+++ b/libs/input/SpriteController.h
@@ -22,7 +22,7 @@
 
 #include <gui/SurfaceComposerClient.h>
 
-#include <SkBitmap.h>
+#include "SpriteIcon.h"
 
 namespace android {
 
@@ -52,40 +52,6 @@
 };
 
 /*
- * Icon that a sprite displays, including its hotspot.
- */
-struct SpriteIcon {
-    inline SpriteIcon() : style(0), hotSpotX(0), hotSpotY(0) { }
-    inline SpriteIcon(const SkBitmap& bitmap, int32_t style, float hotSpotX, float hotSpotY) :
-            bitmap(bitmap), style(style), hotSpotX(hotSpotX), hotSpotY(hotSpotY) { }
-
-    SkBitmap bitmap;
-    int32_t style;
-    float hotSpotX;
-    float hotSpotY;
-
-    inline SpriteIcon copy() const {
-        SkBitmap bitmapCopy;
-        if (bitmapCopy.tryAllocPixels(bitmap.info().makeColorType(kN32_SkColorType))) {
-            bitmap.readPixels(bitmapCopy.info(), bitmapCopy.getPixels(), bitmapCopy.rowBytes(),
-                    0, 0);
-        }
-        return SpriteIcon(bitmapCopy, style, hotSpotX, hotSpotY);
-    }
-
-    inline void reset() {
-        bitmap.reset();
-        style = 0;
-        hotSpotX = 0;
-        hotSpotY = 0;
-    }
-
-    inline bool isValid() const {
-        return !bitmap.isNull() && !bitmap.empty();
-    }
-};
-
-/*
  * A sprite is a simple graphical object that is displayed on-screen above other layers.
  * The basic sprite class is an interface.
  * The implementation is provided by the sprite controller.
@@ -183,7 +149,7 @@
      * This structure is designed so that it can be copied during updates so that
      * surfaces can be resized and redrawn without blocking the client by holding a lock
      * on the sprites for a long time.
-     * Note that the SkBitmap holds a reference to a shared (and immutable) pixel ref. */
+     * Note that the SpriteIcon holds a reference to a shared (and immutable) bitmap. */
     struct SpriteState {
         inline SpriteState() :
                 dirty(0), visible(false),