1 files changed, 67 insertions, 0 deletions
diff --git a/gfx/skia/skia/src/gpu/GrYUVProvider.h b/gfx/skia/skia/src/gpu/GrYUVProvider.h
new file mode 100644
index 000000000..c32af15df
--- /dev/null
+++ b/gfx/skia/skia/src/gpu/GrYUVProvider.h
@@ -0,0 +1,67 @@
+/*
+ * 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 GrYUVProvider_DEFINED
+#define GrYUVProvider_DEFINED
+
+#include "GrTypes.h"
+#include "SkImageInfo.h"
+#include "SkYUVSizeInfo.h"
+
+class GrContext;
+class GrTexture;
+
+/**
+ *  There are at least 2 different ways to extract/retrieve YUV planar data...
+ *  - SkPixelRef
+ *  - SkImageGeneartor
+ *
+ *  To share common functionality around using the planar data, we use this abstract base-class
+ *  to represent accessing that data.
+ */
+class GrYUVProvider {
+public:
+    virtual ~GrYUVProvider() {}
+
+    /**
+     *  On success, this returns a texture that has converted the YUV data from the provider
+     *  into a form that is supported by the GPU (typically transformed into RGB). If useCache
+     *  is true, then the texture will automatically have a key added, so it can be retrieved
+     *  from the cache (assuming it is requested by a provider w/ the same genID).
+     *
+     *  On failure (e.g. the provider had no data), this returns NULL.
+     */
+    sk_sp<GrTexture> refAsTexture(GrContext*, const GrSurfaceDesc&, bool useCache);
+
+    virtual uint32_t onGetID() = 0;
+
+    // These are not meant to be called by a client, only by the implementation
+
+    /**
+     *  If decoding to YUV is supported, this returns true.  Otherwise, this
+     *  returns false and does not modify any of the parameters.
+     *
+     *  @param sizeInfo   Output parameter indicating the sizes and required
+     *                    allocation widths of the Y, U, and V planes.
+     *  @param colorSpace Output parameter.
+     */
+    virtual bool onQueryYUV8(SkYUVSizeInfo* sizeInfo, SkYUVColorSpace* colorSpace) const = 0;
+
+    /**
+     *  Returns true on success and false on failure.
+     *  This always attempts to perform a full decode.  If the client only
+     *  wants size, it should call onQueryYUV8().
+     *
+     *  @param sizeInfo   Needs to exactly match the values returned by the
+     *                    query, except the WidthBytes may be larger than the
+     *                    recommendation (but not smaller).
+     *  @param planes     Memory for each of the Y, U, and V planes.
+     */
+    virtual bool onGetYUV8Planes(const SkYUVSizeInfo& sizeInfo, void* planes[3]) = 0;
+};
+
+#endif