1 files changed, 39 insertions, 0 deletions
diff --git a/gfx/2d/Scale.h b/gfx/2d/Scale.h
new file mode 100644
index 0000000000..673bb88233
--- /dev/null
+++ b/gfx/2d/Scale.h
@@ -0,0 +1,39 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef MOZILLA_GFX_SCALE_H_
+#define MOZILLA_GFX_SCALE_H_
+
+#include "Types.h"
+
+namespace mozilla {
+namespace gfx {
+
+/**
+ * Scale an image using a high-quality filter.
+ *
+ * Synchronously scales an image and writes the output to the destination in
+ * 32-bit format. The destination must be pre-allocated by the caller.
+ *
+ * Returns true if scaling was successful, and false otherwise. Currently, this
+ * function is implemented using Skia. If Skia is not enabled when building,
+ * calling this function will always return false.
+ *
+ * IMPLEMTATION NOTES:
+ * This API is not currently easily hardware acceleratable. A better API might
+ * take a SourceSurface and return a SourceSurface; the Direct2D backend, for
+ * example, could simply set a status bit on a copy of the image, and use
+ * Direct2D's high-quality scaler at draw time.
+ */
+GFX2D_API bool Scale(uint8_t* srcData, int32_t srcWidth, int32_t srcHeight,
+                     int32_t srcStride, uint8_t* dstData, int32_t dstWidth,
+                     int32_t dstHeight, int32_t dstStride,
+                     SurfaceFormat format);
+
+}  // namespace gfx
+}  // namespace mozilla
+
+#endif /* MOZILLA_GFX_BLUR_H_ */