dali/internal/event/images/bitmap-compressed.cpp

   1 /*
   2  * Copyright (c) 2021 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/internal/event/images/bitmap-compressed.h>
  20
  21 // EXTERNAL INCLUDES
  22 #include <cstdlib>
  23
  24 // INTERNAL INCLUDES
  25 #include <dali/integration-api/debug.h>
  26 #include <dali/internal/common/core-impl.h>
  27
  28 namespace Dali
  29 {
  30 namespace Internal
  31 {
  32 using namespace Dali::Pixel;
  33
  34 BitmapCompressed::BitmapCompressed(const ResourcePolicy::Discardable discardable)
  35 : Bitmap(discardable),
  36   mBufferSize(0)
  37 {
  38 }
  39
  40 BitmapCompressed::~BitmapCompressed()
  41 {
  42   DALI_LOG_TRACE_METHOD(Debug::Filter::gImage);
  43 }
  44
  45 void BitmapCompressed::Initialize(Pixel::Format  pixelFormat,
  46                                   const uint32_t width,
  47                                   const uint32_t height,
  48                                   const uint32_t bufferSize)
  49 {
  50   Dali::Integration::Bitmap::Initialize(pixelFormat, width, height);
  51   mBufferSize       = bufferSize;
  52   mAlphaChannelUsed = false; // Default to not using Alpha as we cannot scan the pixels to look for transparent pixels. A follow-up work-item and patch will add an "assume alpha present" flag to ImageAttributes.
  53 }
  54
  55 Dali::Integration::PixelBuffer* BitmapCompressed::ReserveBufferOfSize(Pixel::Format  pixelFormat,
  56                                                                       const uint32_t width,
  57                                                                       const uint32_t height,
  58                                                                       const uint32_t bufferSize)
  59 {
  60   // Sanity check that a not-outrageous amount of data is being passed in (indicating a client error):
  61   DALI_ASSERT_DEBUG(bufferSize < (1U << 27U) && "That is far too much compressed data."); // 128MB of compressed data == unreasonable.
  62   // delete existing buffer
  63   DeletePixelBuffer();
  64
  65   Initialize(pixelFormat, width, height, bufferSize);
  66
  67   mData = reinterpret_cast<Dali::Integration::PixelBuffer*>(malloc(bufferSize));
  68
  69   return mData;
  70 }
  71
  72 } // namespace Internal
  73
  74 } //namespace Dali