dali-scene3d/public-api/loader/buffer-definition.cpp

   1 /*
   2  * Copyright (c) 2023 Samsung Electronics Co., Ltd.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  *
  16  */
  17
  18 // INTERNAL INCLUDES
  19 #include <dali-scene3d/public-api/loader/buffer-definition.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <dali-toolkit/devel-api/builder/base64-encoding.h>
  23 #include <dali/devel-api/adaptor-framework/file-stream.h>
  24 #include <dali/integration-api/debug.h>
  25
  26 namespace Dali
  27 {
  28 namespace Scene3D
  29 {
  30 namespace Loader
  31 {
  32 namespace
  33 {
  34 static constexpr std::string_view EMBEDDED_DATA_PREFIX                 = "data:";
  35 static constexpr std::string_view EMBEDDED_DATA_APPLICATION_MEDIA_TYPE = "application/";
  36 static constexpr std::string_view EMBEDDED_DATA_BASE64_ENCODING_TYPE   = "base64,";
  37 } // namespace
  38
  39 struct BufferDefinition::Impl
  40 {
  41   std::vector<uint8_t>              buffer;
  42   std::shared_ptr<Dali::FileStream> stream;
  43 };
  44
  45 BufferDefinition::BufferDefinition(std::vector<uint8_t>& buffer)
  46 : mImpl{new BufferDefinition::Impl}
  47 {
  48   mImpl.get()->buffer = std::move(buffer);
  49   mImpl.get()->stream = std::make_shared<Dali::FileStream>(reinterpret_cast<uint8_t*>(mImpl.get()->buffer.data()), mImpl.get()->buffer.size(), FileStream::READ | FileStream::BINARY);
  50   mIsEmbedded         = true;
  51 }
  52
  53 BufferDefinition::BufferDefinition()
  54 : mImpl{new BufferDefinition::Impl}
  55 {
  56 }
  57
  58 BufferDefinition::~BufferDefinition() = default;
  59
  60 BufferDefinition::BufferDefinition(BufferDefinition&& other)
  61 : mResourcePath(std::move(other.mResourcePath)),
  62   mUri(std::move(other.mUri)),
  63   mByteLength(std::move(other.mByteLength)),
  64   mName(std::move(other.mName)),
  65   mImpl(std::move(other.mImpl))
  66 {
  67 }
  68
  69 std::iostream& BufferDefinition::GetBufferStream()
  70 {
  71   LoadBuffer();
  72   return mImpl.get()->stream.get()->GetStream();
  73 }
  74
  75 std::string BufferDefinition::GetUri()
  76 {
  77   return mResourcePath + ((mIsEmbedded) ? std::string() : mUri);
  78 }
  79
  80 bool BufferDefinition::IsAvailable()
  81 {
  82   LoadBuffer();
  83   return mImpl.get()->stream != nullptr;
  84 }
  85
  86 void BufferDefinition::LoadBuffer()
  87 {
  88   if(mImpl.get()->stream == nullptr)
  89   {
  90     if(mUri.find(EMBEDDED_DATA_PREFIX.data()) == 0 && mUri.find(EMBEDDED_DATA_APPLICATION_MEDIA_TYPE.data(), EMBEDDED_DATA_PREFIX.length()) == EMBEDDED_DATA_PREFIX.length())
  91     {
  92       uint32_t position = mUri.find(EMBEDDED_DATA_BASE64_ENCODING_TYPE.data(), EMBEDDED_DATA_PREFIX.length() + EMBEDDED_DATA_APPLICATION_MEDIA_TYPE.length());
  93       if(position != std::string::npos)
  94       {
  95         position += EMBEDDED_DATA_BASE64_ENCODING_TYPE.length();
  96         std::string_view data = std::string_view(mUri).substr(position);
  97         mImpl.get()->buffer.clear();
  98         Dali::Toolkit::DecodeBase64FromString(data, mImpl.get()->buffer);
  99         mImpl.get()->stream = std::make_shared<Dali::FileStream>(reinterpret_cast<uint8_t*>(mImpl.get()->buffer.data()), mByteLength, FileStream::READ | FileStream::BINARY);
 100         mIsEmbedded         = true;
 101       }
 102     }
 103     else
 104     {
 105       mImpl.get()->stream = std::make_shared<Dali::FileStream>(mResourcePath + mUri, FileStream::READ | FileStream::BINARY);
 106       if(mImpl.get()->stream == nullptr)
 107       {
 108         DALI_LOG_ERROR("Failed to load %s\n", (mResourcePath + mUri).c_str());
 109       }
 110     }
 111   }
 112 }
 113
 114 } // namespace Loader
 115 } // namespace Scene3D
 116 } // namespace Dali