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()
  46 : mImpl{new BufferDefinition::Impl}
  47 {
  48 }
  49
  50 BufferDefinition::~BufferDefinition() = default;
  51
  52 BufferDefinition::BufferDefinition(BufferDefinition&& other)
  53 : mResourcePath(std::move(other.mResourcePath)),
  54   mUri(std::move(other.mUri)),
  55   mByteLength(std::move(other.mByteLength)),
  56   mName(std::move(other.mName)),
  57   mImpl(std::move(other.mImpl))
  58 {
  59 }
  60
  61 std::iostream& BufferDefinition::GetBufferStream()
  62 {
  63   LoadBuffer();
  64   return mImpl.get()->stream.get()->GetStream();
  65 }
  66
  67 std::string BufferDefinition::GetUri()
  68 {
  69   return mResourcePath + ((mIsEmbedded) ? std::string() : mUri);
  70 }
  71
  72 bool BufferDefinition::IsAvailable()
  73 {
  74   LoadBuffer();
  75   return mImpl.get()->stream != nullptr;
  76 }
  77
  78 void BufferDefinition::LoadBuffer()
  79 {
  80   if(mImpl.get()->stream == nullptr)
  81   {
  82     if(mUri.find(EMBEDDED_DATA_PREFIX.data()) == 0 && mUri.find(EMBEDDED_DATA_APPLICATION_MEDIA_TYPE.data(), EMBEDDED_DATA_PREFIX.length()) == EMBEDDED_DATA_PREFIX.length())
  83     {
  84       uint32_t position = mUri.find(EMBEDDED_DATA_BASE64_ENCODING_TYPE.data(), EMBEDDED_DATA_PREFIX.length() + EMBEDDED_DATA_APPLICATION_MEDIA_TYPE.length());
  85       if(position != std::string::npos)
  86       {
  87         position += EMBEDDED_DATA_BASE64_ENCODING_TYPE.length();
  88         std::string data = mUri.substr(position);
  89         mImpl.get()->buffer.clear();
  90         Dali::Toolkit::DecodeBase64PropertyData(data, mImpl.get()->buffer);
  91         mImpl.get()->stream = std::make_shared<Dali::FileStream>(reinterpret_cast<uint8_t*>(mImpl.get()->buffer.data()), mByteLength, FileStream::READ | FileStream::BINARY);
  92         mIsEmbedded         = true;
  93       }
  94     }
  95     else
  96     {
  97       mImpl.get()->stream = std::make_shared<Dali::FileStream>(mResourcePath + mUri, FileStream::READ | FileStream::BINARY);
  98       if(mImpl.get()->stream == nullptr)
  99       {
 100         DALI_LOG_ERROR("Failed to load %s\n", (mResourcePath + mUri).c_str());
 101       }
 102     }
 103   }
 104 }
 105
 106 } // namespace Loader
 107 } // namespace Scene3D
 108 } // namespace Dali