1 files changed, 107 insertions, 0 deletions
diff --git a/xbmc/windowing/gbm/GBMUtils.cpp b/xbmc/windowing/gbm/GBMUtils.cpp
new file mode 100644
index 0000000..5267c93
--- /dev/null
+++ b/xbmc/windowing/gbm/GBMUtils.cpp
@@ -0,0 +1,107 @@
+/*
+ *  Copyright (C) 2005-2018 Team Kodi
+ *  This file is part of Kodi - https://kodi.tv
+ *
+ *  SPDX-License-Identifier: GPL-2.0-or-later
+ *  See LICENSES/README.md for more information.
+ */
+
+#include "GBMUtils.h"
+
+#include "utils/log.h"
+
+#include <mutex>
+
+using namespace KODI::WINDOWING::GBM;
+
+namespace
+{
+std::once_flag flag;
+}
+
+bool CGBMUtils::CreateDevice(int fd)
+{
+  auto device = gbm_create_device(fd);
+  if (!device)
+  {
+    CLog::Log(LOGERROR, "CGBMUtils::{} - failed to create device: {}", __FUNCTION__,
+              strerror(errno));
+    return false;
+  }
+
+  m_device.reset(new CGBMDevice(device));
+
+  return true;
+}
+
+CGBMUtils::CGBMDevice::CGBMDevice(gbm_device* device) : m_device(device)
+{
+}
+
+bool CGBMUtils::CGBMDevice::CreateSurface(
+    int width, int height, uint32_t format, const uint64_t* modifiers, const int modifiers_count)
+{
+  gbm_surface* surface{nullptr};
+#if defined(HAS_GBM_MODIFIERS)
+  if (modifiers)
+  {
+    surface = gbm_surface_create_with_modifiers(m_device, width, height, format, modifiers,
+                                                modifiers_count);
+  }
+#endif
+  if (!surface)
+  {
+    surface = gbm_surface_create(m_device, width, height, format,
+                                 GBM_BO_USE_SCANOUT | GBM_BO_USE_RENDERING);
+  }
+
+  if (!surface)
+  {
+    CLog::Log(LOGERROR, "CGBMUtils::{} - failed to create surface: {}", __FUNCTION__,
+              strerror(errno));
+    return false;
+  }
+
+  CLog::Log(LOGDEBUG, "CGBMUtils::{} - created surface with size {}x{}", __FUNCTION__, width,
+            height);
+
+  m_surface.reset(new CGBMSurface(surface));
+
+  return true;
+}
+
+CGBMUtils::CGBMDevice::CGBMSurface::CGBMSurface(gbm_surface* surface) : m_surface(surface)
+{
+}
+
+CGBMUtils::CGBMDevice::CGBMSurface::CGBMSurfaceBuffer* CGBMUtils::CGBMDevice::CGBMSurface::
+    LockFrontBuffer()
+{
+  m_buffers.emplace(std::make_unique<CGBMSurfaceBuffer>(m_surface));
+
+  if (!static_cast<bool>(gbm_surface_has_free_buffers(m_surface)))
+  {
+    /*
+     * We want to use call_once here because we want it to be logged the first time that
+     * we have to release buffers. This means that the maximum amount of buffers had been reached.
+     * For mesa this should be 4 buffers but it may vary across other implementations.
+     */
+    std::call_once(
+        flag, [this]() { CLog::Log(LOGDEBUG, "CGBMUtils - using {} buffers", m_buffers.size()); });
+
+    m_buffers.pop();
+  }
+
+  return m_buffers.back().get();
+}
+
+CGBMUtils::CGBMDevice::CGBMSurface::CGBMSurfaceBuffer::CGBMSurfaceBuffer(gbm_surface* surface)
+  : m_surface(surface), m_buffer(gbm_surface_lock_front_buffer(surface))
+{
+}
+
+CGBMUtils::CGBMDevice::CGBMSurface::CGBMSurfaceBuffer::~CGBMSurfaceBuffer()
+{
+  if (m_surface && m_buffer)
+    gbm_surface_release_buffer(m_surface, m_buffer);
+}