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// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef PPAPI_THUNK_PPB_IMAGE_DATA_API_H_
#define PPAPI_THUNK_PPB_IMAGE_DATA_API_H_
#include <stdint.h>
#include "ppapi/c/pp_bool.h"
#include "ppapi/c/ppb_image_data.h"
class SkCanvas;
namespace base {
class SharedMemory;
} // namespace base
namespace ppapi {
namespace thunk {
class PPB_ImageData_API {
public:
virtual ~PPB_ImageData_API() {}
virtual PP_Bool Describe(PP_ImageDataDesc* desc) = 0;
virtual void* Map() = 0;
virtual void Unmap() = 0;
// Trusted inteface.
virtual int32_t GetSharedMemory(base::SharedMemory** shm,
uint32_t* byte_count) = 0;
// Get the platform-specific canvas that backs this ImageData, if there is
// one.
// The canvas will be NULL:
// * If the image is not mapped.
// * Within untrusted code (which does not have skia).
// * If the ImageData is not backed by a platform-specific image buffer.
// This will be the case for ImageDatas created for use in NaCl.
// For this last reason, you should prefer GetCanvas any time you don't need
// a platform-specific canvas (e.g., for use with platform-specific APIs).
// Anything that relies on having a PlatformCanvas will not work for ImageDat
// objects created from NaCl.
virtual SkCanvas* GetPlatformCanvas() = 0;
// Get the canvas that backs this ImageData, if there is one.
// The canvas will be NULL:
// * If the image is not mapped.
// * Within untrusted code (which does not have skia).
virtual SkCanvas* GetCanvas() = 0;
// Signal that this image is a good candidate for reuse. Call this from APIs
// that receive ImageData resources of a fixed size and where the plugin will
// release its reference to the ImageData. If the current implementation
// supports image data reuse (only supported out-of-process) then the
// ImageData will be marked and potentially cached for re-use.
virtual void SetIsCandidateForReuse() = 0;
};
} // namespace thunk
} // namespace ppapi
#endif // PPAPI_THUNK_PPB_IMAGE_DATA_API_H_
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