Parse icc profiles and exif orientation from jpeg markers

include/codec/SkCodec.h

Index: include/codec/SkCodec.h
diff --git a/include/codec/SkCodec.h b/include/codec/SkCodec.h
index 3855064f614d552bcb18e9ce6f6893bdb53e3740..629274d21ccacc734259c981b670d60cf1d37c5e 100644
--- a/include/codec/SkCodec.h
+++ b/include/codec/SkCodec.h
@@ -107,6 +107,25 @@ public:
      */
     SkColorSpace* getColorSpace() const { return fColorSpace.get(); }
 
+    enum Origin {
+        kTopLeft_Origin     = 1, // Default
+        kTopRight_Origin    = 2, // Reflected across y-axis
+        kBottomRight_Origin = 3, // Rotated 180
+        kBottomLeft_Origin  = 4, // Reflected across x-axis
+        kLeftTop_Origin     = 5, // Reflected across x-axis, Rotated 90 CCW
+        kRightTop_Origin    = 6, // Rotated 90 CW
+        kRightBottom_Origin = 7, // Reflected across x-axis, Rotated 90 CW
+        kLeftBottom_Origin  = 8, // Rotated 90 CCW
+        kDefault_Origin     = kTopLeft_Origin,
+        kLast_Origin        = kLeftBottom_Origin,
+    };
+
+    /**
+     *  Returns the image orientation stored in the EXIF data.
+     *  If there is no EXIF data, or if we cannot read the EXIF data, returns kTopLeft.
+     */
+    Origin getOrigin() const { return fOrigin; }
+
     /**
      *  Return a size that approximately supports the desired scale factor.
      *  The codec may not be able to scale efficiently to the exact scale
@@ -491,9 +510,11 @@ public:
 protected:
     /**
      *  Takes ownership of SkStream*
-     *  Does not affect ownership of SkColorSpace*
      */
-    SkCodec(const SkImageInfo&, SkStream*, sk_sp<SkColorSpace> = nullptr);
+    SkCodec(const SkImageInfo&,
+            SkStream*,
+            sk_sp<SkColorSpace> = nullptr,
+            Origin = kTopLeft_Origin);
 
     virtual SkISize onGetScaledDimensions(float /*desiredScale*/) const {
         // By default, scaling is not supported.
@@ -625,6 +646,7 @@ private:
     SkAutoTDelete<SkStream>     fStream;
     bool                        fNeedsRewind;
     sk_sp<SkColorSpace>         fColorSpace;
+    const Origin                fOrigin;
 
     // These fields are only meaningful during scanline decodes.
     SkImageInfo                 fDstInfo;