apply codec origin in generator

Bug: skia:
Change-Id: I383dacb49b1e3c88467ccdbf3288764bb1bbf01a
Reviewed-on: https://skia-review.googlesource.com/58600
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Mike Reed <reed@google.com>

1 files changed, 33 insertions, 0 deletions

diff --git a/src/core/SkPixmapPriv.h b/src/core/SkPixmapPriv.h
new file mode 100644
index 0000000000..dfc9ce2dd0
--- /dev/null
+++ b/src/core/SkPixmapPriv.h
@@ -0,0 +1,33 @@
+/*
+ * Copyright 2015 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#ifndef SkPixmapPriv_DEFINED
+#define SkPixmapPriv_DEFINED
+
+#include "SkPixmap.h"
+#include "SkCodec.h"
+
+class SkPixmapPriv {
+public:
+    // These flag are applied in this order (swap is applied last)
+    enum OrientFlags {
+        kMirrorX = 1 << 0,
+        kMirrorY = 1 << 1,
+        kSwapXY  = 1 << 2,
+    };
+
+    static OrientFlags OriginToOrient(SkCodec::Origin);
+
+    /**
+     *  Copy the pixels in this pixmap into dst, applying the orientation transformations specified
+     *  by the flags. If the inputs are invalid, this returns false and no copy is made.
+     */
+    static bool Orient(const SkPixmap& dst, const SkPixmap& src, OrientFlags);
+};
+
+#endif
+