1 files changed, 86 insertions, 0 deletions
diff --git a/include/android/SkAnimatedImage.h b/include/android/SkAnimatedImage.h
new file mode 100644
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+++ b/include/android/SkAnimatedImage.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright 2018 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkAnimatedImage_DEFINED
+#define SkAnimatedImage_DEFINED
+
+#include "SkBitmap.h"
+#include "SkCodecAnimation.h"
+#include "SkDrawable.h"
+
+class SkAndroidCodec;
+
+/**
+ *  Thread unsafe drawable for drawing animated images (e.g. GIF).
+ */
+class SK_API SkAnimatedImage : public SkDrawable {
+public:
+    /**
+     *  Create an SkAnimatedImage from the SkAndroidCodec.
+     *
+     *  Returns null on failure to allocate pixels. On success, this will
+     *  decode the first frame. It will not animate until start() is called.
+     */
+    static sk_sp<SkAnimatedImage> Make(std::unique_ptr<SkAndroidCodec>);
+
+    ~SkAnimatedImage() override;
+
+    /**
+     *  Start or resume the animation. update() must be called to advance the
+     *  time.
+     */
+    void start();
+
+    /**
+     *  Stop the animation. update() has no effect while the animation is
+     *  stopped.
+     */
+    void stop();
+
+    /**
+     *  Reset the animation to the beginning.
+     */
+    void reset();
+
+    /**
+     *  Update the current time. If the image is animating, this may decode
+     *  a new frame.
+     *
+     *  @return the time to show the next frame.
+     *      Returns numeric_limits<double>::max() if there is no max frame to
+     *      show, and -1.0 if the animation is not running.
+     */
+    double update(double msecs);
+
+protected:
+    SkRect onGetBounds() override;
+    void onDraw(SkCanvas*) override;
+
+private:
+    struct Frame {
+        SkBitmap fBitmap;
+        int      fIndex;
+        SkCodecAnimation::DisposalMethod fDisposalMethod;
+
+        Frame();
+        bool copyTo(Frame*) const;
+    };
+
+    std::unique_ptr<SkAndroidCodec> fCodec;
+    bool                            fFinished;
+    bool                            fRunning;
+    double                          fNowMS;
+    double                          fRemainingMS;
+    Frame                           fActiveFrame;
+    Frame                           fRestoreFrame;
+
+    SkAnimatedImage(std::unique_ptr<SkAndroidCodec>);
+
+    typedef SkDrawable INHERITED;
+};
+
+#endif // SkAnimatedImage_DEFINED