1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef PPAPI_THUNK_PPB_IMAGE_DATA_API_H_ 6 #define PPAPI_THUNK_PPB_IMAGE_DATA_API_H_ 7 8 #include "ppapi/c/pp_bool.h" 9 #include "ppapi/c/ppb_image_data.h" 10 11 class SkCanvas; 12 13 namespace ppapi { 14 namespace thunk { 15 16 class PPB_ImageData_API { 17 public: 18 virtual ~PPB_ImageData_API() {} 19 20 virtual PP_Bool Describe(PP_ImageDataDesc* desc) = 0; 21 virtual void* Map() = 0; 22 virtual void Unmap() = 0; 23 24 // Trusted inteface. 25 virtual int32_t GetSharedMemory(int* handle, uint32_t* byte_count) = 0; 26 27 // Get the platform-specific canvas that backs this ImageData, if there is 28 // one. 29 // The canvas will be NULL: 30 // * If the image is not mapped. 31 // * Within untrusted code (which does not have skia). 32 // * If the ImageData is not backed by a platform-specific image buffer. 33 // This will be the case for ImageDatas created for use in NaCl. 34 // For this last reason, you should prefer GetCanvas any time you don't need 35 // a platform-specific canvas (e.g., for use with platform-specific APIs). 36 // Anything that relies on having a PlatformCanvas will not work for ImageDat 37 // objects created from NaCl. 38 virtual SkCanvas* GetPlatformCanvas() = 0; 39 40 // Get the canvas that backs this ImageData, if there is one. 41 // The canvas will be NULL: 42 // * If the image is not mapped. 43 // * Within untrusted code (which does not have skia). 44 virtual SkCanvas* GetCanvas() = 0; 45 46 // Signal that this image is a good candidate for reuse. Call this from APIs 47 // that receive ImageData resources of a fixed size and where the plugin will 48 // release its reference to the ImageData. If the current implementation 49 // supports image data reuse (only supported out-of-process) then the 50 // ImageData will be marked and potentially cached for re-use. 51 virtual void SetIsCandidateForReuse() = 0; 52 }; 53 54 } // namespace thunk 55 } // namespace ppapi 56 57 #endif // PPAPI_THUNK_PPB_IMAGE_DATA_API_H_ 58
