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| author | Magnus Auvinen <magnus.auvinen@gmail.com> | 2007-08-22 07:52:33 +0000 |
|---|---|---|
| committer | Magnus Auvinen <magnus.auvinen@gmail.com> | 2007-08-22 07:52:33 +0000 |
| commit | 8b3c16e6152a527f9aec1a88a9eed74119de7000 (patch) | |
| tree | f0bde5cea15e696e42cade06a3b12ff6b13acc57 /src/engine/external/glfw/lib/win32/win32_time.c | |
| parent | 9899666a7ce6679a3b9667ab09f615f4d0769c16 (diff) | |
| download | zcatch-8b3c16e6152a527f9aec1a88a9eed74119de7000.tar.gz zcatch-8b3c16e6152a527f9aec1a88a9eed74119de7000.zip | |
major engine cleanup. dependency on baselib removed. engine is now C code (not ansi tho). some other cruft removed aswell
Diffstat (limited to 'src/engine/external/glfw/lib/win32/win32_time.c')
| -rw-r--r-- | src/engine/external/glfw/lib/win32/win32_time.c | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/src/engine/external/glfw/lib/win32/win32_time.c b/src/engine/external/glfw/lib/win32/win32_time.c new file mode 100644 index 00000000..ea35a8e5 --- /dev/null +++ b/src/engine/external/glfw/lib/win32/win32_time.c @@ -0,0 +1,146 @@ +//======================================================================== +// GLFW - An OpenGL framework +// File: win32_time.c +// Platform: Windows +// API version: 2.6 +// WWW: http://glfw.sourceforge.net +//------------------------------------------------------------------------ +// Copyright (c) 2002-2006 Camilla Berglund +// +// This software is provided 'as-is', without any express or implied +// warranty. In no event will the authors be held liable for any damages +// arising from the use of this software. +// +// Permission is granted to anyone to use this software for any purpose, +// including commercial applications, and to alter it and redistribute it +// freely, subject to the following restrictions: +// +// 1. The origin of this software must not be misrepresented; you must not +// claim that you wrote the original software. If you use this software +// in a product, an acknowledgment in the product documentation would +// be appreciated but is not required. +// +// 2. Altered source versions must be plainly marked as such, and must not +// be misrepresented as being the original software. +// +// 3. This notice may not be removed or altered from any source +// distribution. +// +//======================================================================== + +#include "internal.h" + + +//************************************************************************ +//**** GLFW internal functions **** +//************************************************************************ + +//======================================================================== +// _glfwInitTimer() - Initialise timer +//======================================================================== + +void _glfwInitTimer( void ) +{ + __int64 freq; + + // Check if we have a performance counter + if( QueryPerformanceFrequency( (LARGE_INTEGER *)&freq ) ) + { + // Performance counter is available => use it! + _glfwLibrary.Timer.HasPerformanceCounter = GL_TRUE; + + // Counter resolution is 1 / counter frequency + _glfwLibrary.Timer.Resolution = 1.0 / (double)freq; + + // Set start time for timer + QueryPerformanceCounter( (LARGE_INTEGER *)&_glfwLibrary.Timer.t0_64 ); + } + else + { + // No performace counter available => use the tick counter + _glfwLibrary.Timer.HasPerformanceCounter = GL_FALSE; + + // Counter resolution is 1 ms + _glfwLibrary.Timer.Resolution = 0.001; + + // Set start time for timer + _glfwLibrary.Timer.t0_32 = _glfw_timeGetTime(); + } +} + + +//************************************************************************ +//**** Platform implementation functions **** +//************************************************************************ + +//======================================================================== +// Return timer value in seconds +//======================================================================== + +double _glfwPlatformGetTime( void ) +{ + double t; + __int64 t_64; + + if( _glfwLibrary.Timer.HasPerformanceCounter ) + { + QueryPerformanceCounter( (LARGE_INTEGER *)&t_64 ); + t = (double)(t_64 - _glfwLibrary.Timer.t0_64); + } + else + { + t = (double)(_glfw_timeGetTime() - _glfwLibrary.Timer.t0_32); + } + + // Calculate the current time in seconds + return t * _glfwLibrary.Timer.Resolution; +} + + +//======================================================================== +// Set timer value in seconds +//======================================================================== + +void _glfwPlatformSetTime( double t ) +{ + __int64 t_64; + + if( _glfwLibrary.Timer.HasPerformanceCounter ) + { + QueryPerformanceCounter( (LARGE_INTEGER *)&t_64 ); + _glfwLibrary.Timer.t0_64 = t_64 - (__int64)(t/_glfwLibrary.Timer.Resolution); + } + else + { + _glfwLibrary.Timer.t0_32 = _glfw_timeGetTime() - (int)(t*1000.0); + } +} + + +//======================================================================== +// Put a thread to sleep for a specified amount of time +//======================================================================== + +void _glfwPlatformSleep( double time ) +{ + DWORD t; + + if( time == 0.0 ) + { + t = 0; + } + else if( time < 0.001 ) + { + t = 1; + } + else if( time > 2147483647.0 ) + { + t = 2147483647; + } + else + { + t = (DWORD)(time*1000.0 + 0.5); + } + Sleep( t ); +} + |