2 * Copyright (c) 2014 Samsung Electronics Co., Ltd.
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
8 * http://www.apache.org/licenses/LICENSE-2.0
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.
19 #include "vsync-monitor.h"
22 #include <sys/types.h>
27 #include <dali/integration-api/debug.h>
40 // constants to keep code readability with unsigned int has to be used as boolean (due to multithreading)
41 const unsigned int TRUE = 1u;
42 const unsigned int FALSE = 0u;
44 const int FD_NONE( -1 );
46 } // unnamed namespace
48 VSyncMonitor::VSyncMonitor()
49 : mFileDescriptor( FD_NONE ),
50 mUseHardwareVSync( FALSE ),
51 mHardwareVSyncAvailable( FALSE )
55 VSyncMonitor::~VSyncMonitor()
60 void VSyncMonitor::SetUseHardwareVSync( bool useHardware )
62 mUseHardwareVSync = useHardware;
65 void VSyncMonitor::SetHardwareVSyncAvailable( bool hardwareVSyncAvailable )
67 mHardwareVSyncAvailable = hardwareVSyncAvailable;
70 void VSyncMonitor::Initialize()
72 DALI_ASSERT_DEBUG( mFileDescriptor == FD_NONE && "VSyncMonitor::Initialize() called twice" );
74 // setup vblank request - block and wait for next vblank
75 mVBlankInfo.request.type = DRM_VBLANK_NEXTONMISS;
76 mVBlankInfo.request.sequence = 0;
77 mVBlankInfo.request.signal = 0;
79 // setup vblank reply - block and wait for next vblank
80 mVBlankInfo.reply.type = DRM_VBLANK_NEXTONMISS;
81 mVBlankInfo.reply.sequence = 0;
82 mVBlankInfo.reply.tval_sec = 0;
83 mVBlankInfo.reply.tval_usec = 0;
86 void VSyncMonitor::Terminate()
90 bool VSyncMonitor::UseHardware()
92 return mUseHardwareVSync && mHardwareVSyncAvailable && (FD_NONE != mFileDescriptor );
96 bool VSyncMonitor::DoSync( unsigned int& frameNumber, unsigned int& seconds, unsigned int& microseconds )
98 DALI_ASSERT_DEBUG( mFileDescriptor != FD_NONE && "ECoreX::VSyncMonitor is not initialized" );
100 if( 0 == drmWaitVBlank( mFileDescriptor, &mVBlankInfo ) )
102 frameNumber = mVBlankInfo.reply.sequence;
103 seconds = mVBlankInfo.reply.tval_sec;
104 microseconds = mVBlankInfo.reply.tval_usec;
112 } // namespace Adaptor
114 } // namespace Internal