text: // 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.
  
  #include "ppapi/shared_impl/ppb_image_data_shared.h"
  
  #include "base/logging.h"
  #include "build/build_config.h"
  
  #if !defined(OS_NACL) && !defined(NACL_WIN64)
  #include "third_party/skia/include/core/SkTypes.h"
  #endif
  
  namespace ppapi {
  
  // static
  PP_ImageDataFormat PPB_ImageData_Shared::GetNativeImageDataFormat() {
  #if defined(OS_NACL)
    // In NaCl, just default to something. If we're wrong, it will be converted
    // later.
    // TODO(dmichael): Really proxy this.
    return PP_IMAGEDATAFORMAT_BGRA_PREMUL;
  #elif defined(NACL_WIN64)
    // In the NaCl Win64 helper, this shouldn't be called. If we start building
    // Chrome on Windows 64 for realz, we should really implement this.
    NOTIMPLEMENTED();
    return PP_IMAGEDATAFORMAT_BGRA_PREMUL;
  #else
    if (SK_B32_SHIFT == 0)
      return PP_IMAGEDATAFORMAT_BGRA_PREMUL;
    else if (SK_R32_SHIFT == 0)
      return PP_IMAGEDATAFORMAT_RGBA_PREMUL;
    else
      return PP_IMAGEDATAFORMAT_BGRA_PREMUL;  // Default to something on failure
  #endif
  }
  
  // static
  PP_Bool PPB_ImageData_Shared::IsImageDataFormatSupported(
      PP_ImageDataFormat format) {
    return PP_FromBool(format == PP_IMAGEDATAFORMAT_BGRA_PREMUL ||
                       format == PP_IMAGEDATAFORMAT_RGBA_PREMUL);
  }
  
  // static
  PP_Bool PPB_ImageData_Shared::IsImageDataDescValid(
      const PP_ImageDataDesc& desc) {
    return PP_FromBool(IsImageDataFormatSupported(desc.format) &&
                       desc.size.width > 0 && desc.size.height > 0 &&
                       desc.stride > 0);
  }
  
  }  // namespace ppapi
  