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 // CLASS HEADER
  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::Scene3D::Loader
  27 {
  28 namespace
  29 {
  30 static constexpr std::string_view EMBEDDED_DATA_PREFIX                 = "data:";
  31 static constexpr std::string_view EMBEDDED_DATA_APPLICATION_MEDIA_TYPE = "application/";
  32 static constexpr std::string_view EMBEDDED_DATA_BASE64_ENCODING_TYPE   = "base64,";
  33 } // namespace
  34
  35 struct BufferDefinition::Impl
  36 {
  37   std::vector<uint8_t>              buffer;
  38   std::shared_ptr<Dali::FileStream> stream;
  39 };
  40
  41 BufferDefinition::BufferDefinition(std::vector<uint8_t>& buffer)
  42 : mImpl{new BufferDefinition::Impl}
  43 {
  44   mImpl.get()->buffer = std::move(buffer);
  45   mImpl.get()->stream = std::make_shared<Dali::FileStream>(reinterpret_cast<uint8_t*>(mImpl.get()->buffer.data()), mImpl.get()->buffer.size(), FileStream::READ | FileStream::BINARY);
  46   mIsEmbedded         = true;
  47 }
  48
  49 BufferDefinition::BufferDefinition()
  50 : mImpl{new BufferDefinition::Impl}
  51 {
  52 }
  53
  54 BufferDefinition::~BufferDefinition() = default;
  55
  56 BufferDefinition::BufferDefinition(BufferDefinition&& other)
  57 : mResourcePath(std::move(other.mResourcePath)),
  58   mUri(std::move(other.mUri)),
  59   mByteLength(std::move(other.mByteLength)),
  60   mName(std::move(other.mName)),
  61   mImpl(std::move(other.mImpl))
  62 {
  63 }
  64
  65 std::iostream& BufferDefinition::GetBufferStream()
  66 {
  67   LoadBuffer();
  68   return mImpl.get()->stream.get()->GetStream();
  69 }
  70
  71 std::string BufferDefinition::GetUri()
  72 {
  73   return mResourcePath + ((mIsEmbedded) ? std::string() : mUri);
  74 }
  75
  76 bool BufferDefinition::IsAvailable()
  77 {
  78   LoadBuffer();
  79   return mImpl.get()->stream != nullptr;
  80 }
  81
  82 void BufferDefinition::LoadBuffer()
  83 {
  84   if(mImpl.get()->stream == nullptr)
  85   {
  86     if(mUri.find(EMBEDDED_DATA_PREFIX.data()) == 0 && mUri.find(EMBEDDED_DATA_APPLICATION_MEDIA_TYPE.data(), EMBEDDED_DATA_PREFIX.length()) == EMBEDDED_DATA_PREFIX.length())
  87     {
  88       uint32_t position = mUri.find(EMBEDDED_DATA_BASE64_ENCODING_TYPE.data(), EMBEDDED_DATA_PREFIX.length() + EMBEDDED_DATA_APPLICATION_MEDIA_TYPE.length());
  89       if(position != std::string::npos)
  90       {
  91         position += EMBEDDED_DATA_BASE64_ENCODING_TYPE.length();
  92         std::string_view data = std::string_view(mUri).substr(position);
  93         mImpl.get()->buffer.clear();
  94         Dali::Toolkit::DecodeBase64FromString(data, mImpl.get()->buffer);
  95         mImpl.get()->stream = std::make_shared<Dali::FileStream>(reinterpret_cast<uint8_t*>(mImpl.get()->buffer.data()), mByteLength, FileStream::READ | FileStream::BINARY);
  96         mIsEmbedded         = true;
  97       }
  98     }
  99     else
 100     {
 101       mImpl.get()->stream = std::make_shared<Dali::FileStream>(mResourcePath + mUri, FileStream::READ | FileStream::BINARY);
 102       if(mImpl.get()->stream == nullptr)
 103       {
 104         DALI_LOG_ERROR("Failed to load %s\n", (mResourcePath + mUri).c_str());
 105       }
 106     }
 107   }
 108 }
 109
 110 } // namespace Dali::Scene3D::Loader