xbmc/utils/GBMBufferObject.cpp

   1 /*
   2  *  Copyright (C) 2005-2018 Team Kodi
   3  *  This file is part of Kodi - https://kodi.tv
   4  *
   5  *  SPDX-License-Identifier: GPL-2.0-or-later
   6  *  See LICENSES/README.md for more information.
   7  */
   8
   9 #include "GBMBufferObject.h"
  10
  11 #include "BufferObjectFactory.h"
  12 #include "ServiceBroker.h"
  13 #include "windowing/gbm/WinSystemGbmEGLContext.h"
  14
  15 #include <gbm.h>
  16 #include <unistd.h>
  17
  18 using namespace KODI::WINDOWING::GBM;
  19
  20 std::unique_ptr<CBufferObject> CGBMBufferObject::Create()
  21 {
  22   return std::make_unique<CGBMBufferObject>();
  23 }
  24
  25 void CGBMBufferObject::Register()
  26 {
  27   CBufferObjectFactory::RegisterBufferObject(CGBMBufferObject::Create);
  28 }
  29
  30 CGBMBufferObject::CGBMBufferObject()
  31 {
  32   m_device =
  33       static_cast<CWinSystemGbmEGLContext*>(CServiceBroker::GetWinSystem())->GetGBMDevice()->Get();
  34 }
  35
  36 CGBMBufferObject::~CGBMBufferObject()
  37 {
  38   ReleaseMemory();
  39   DestroyBufferObject();
  40 }
  41
  42 bool CGBMBufferObject::CreateBufferObject(uint32_t format, uint32_t width, uint32_t height)
  43 {
  44   if (m_fd >= 0)
  45     return true;
  46
  47   m_width = width;
  48   m_height = height;
  49
  50   m_bo = gbm_bo_create(m_device, m_width, m_height, format, GBM_BO_USE_LINEAR);
  51
  52   if (!m_bo)
  53     return false;
  54
  55   m_fd = gbm_bo_get_fd(m_bo);
  56
  57   return true;
  58 }
  59
  60 void CGBMBufferObject::DestroyBufferObject()
  61 {
  62   close(m_fd);
  63
  64   if (m_bo)
  65     gbm_bo_destroy(m_bo);
  66
  67   m_bo = nullptr;
  68   m_fd = -1;
  69 }
  70
  71 uint8_t* CGBMBufferObject::GetMemory()
  72 {
  73   if (m_bo)
  74   {
  75     m_map = static_cast<uint8_t*>(gbm_bo_map(m_bo, 0, 0, m_width, m_height, GBM_BO_TRANSFER_WRITE, &m_stride, &m_map_data));
  76     if (m_map)
  77       return m_map;
  78   }
  79
  80   return nullptr;
  81 }
  82
  83 void CGBMBufferObject::ReleaseMemory()
  84 {
  85   if (m_bo && m_map)
  86   {
  87     gbm_bo_unmap(m_bo, m_map_data);
  88     m_map_data = nullptr;
  89     m_map = nullptr;
  90   }
  91 }
  92
  93 uint64_t CGBMBufferObject::GetModifier()
  94 {
  95 #if defined(HAS_GBM_MODIFIERS)
  96   return gbm_bo_get_modifier(m_bo);
  97 #else
  98   return 0;
  99 #endif
 100 }