ref: 0a99762fecf60df9be62bc61f6bc979cf2188be5
dir: /external/glfw/src/init.c/
//========================================================================
// GLFW 3.3 - www.glfw.org
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2018 Camilla Löwy <elmindreda@glfw.org>
//
// 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.
//
//========================================================================
// Please use C89 style variable declarations in this file because VS 2010
//========================================================================
#include "internal.h"
#include "mappings.h"
#include <string.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <assert.h>
// The global variables below comprise all mutable global data in GLFW
//
// Any other global variable is a bug
// Global state shared between compilation units of GLFW
//
_GLFWlibrary _glfw = { GLFW_FALSE };
// These are outside of _glfw so they can be used before initialization and
// after termination
//
static _GLFWerror _glfwMainThreadError;
static GLFWerrorfun _glfwErrorCallback;
static _GLFWinitconfig _glfwInitHints =
{
GLFW_TRUE, // hat buttons
{
GLFW_TRUE, // macOS menu bar
GLFW_TRUE // macOS bundle chdir
}
};
// Terminate the library
//
static void terminate(void)
{
int i;
memset(&_glfw.callbacks, 0, sizeof(_glfw.callbacks));
while (_glfw.windowListHead)
glfwDestroyWindow((GLFWwindow*) _glfw.windowListHead);
while (_glfw.cursorListHead)
glfwDestroyCursor((GLFWcursor*) _glfw.cursorListHead);
for (i = 0; i < _glfw.monitorCount; i++)
{
_GLFWmonitor* monitor = _glfw.monitors[i];
if (monitor->originalRamp.size)
_glfwPlatformSetGammaRamp(monitor, &monitor->originalRamp);
_glfwFreeMonitor(monitor);
}
free(_glfw.monitors);
_glfw.monitors = NULL;
_glfw.monitorCount = 0;
free(_glfw.mappings);
_glfw.mappings = NULL;
_glfw.mappingCount = 0;
_glfwTerminateVulkan();
_glfwPlatformTerminate();
_glfw.initialized = GLFW_FALSE;
while (_glfw.errorListHead)
{
_GLFWerror* error = _glfw.errorListHead;
_glfw.errorListHead = error->next;
free(error);
}
_glfwPlatformDestroyTls(&_glfw.contextSlot);
_glfwPlatformDestroyTls(&_glfw.errorSlot);
_glfwPlatformDestroyMutex(&_glfw.errorLock);
memset(&_glfw, 0, sizeof(_glfw));
}
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
char* _glfw_strdup(const char* source)
{
const size_t length = strlen(source);
char* result = calloc(length + 1, 1);
strcpy(result, source);
return result;
}
float _glfw_fminf(float a, float b)
{
if (a != a)
return b;
else if (b != b)
return a;
else if (a < b)
return a;
else
return b;
}
float _glfw_fmaxf(float a, float b)
{
if (a != a)
return b;
else if (b != b)
return a;
else if (a > b)
return a;
else
return b;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW event API //////
//////////////////////////////////////////////////////////////////////////
// Notifies shared code of an error
//
void _glfwInputError(int code, const char* format, ...)
{
_GLFWerror* error;
char description[_GLFW_MESSAGE_SIZE];
if (format)
{
va_list vl;
va_start(vl, format);
vsnprintf(description, sizeof(description), format, vl);
va_end(vl);
description[sizeof(description) - 1] = '\0';
}
else
{
if (code == GLFW_NOT_INITIALIZED)
strcpy(description, "The GLFW library is not initialized");
else if (code == GLFW_NO_CURRENT_CONTEXT)
strcpy(description, "There is no current context");
else if (code == GLFW_INVALID_ENUM)
strcpy(description, "Invalid argument for enum parameter");
else if (code == GLFW_INVALID_VALUE)
strcpy(description, "Invalid value for parameter");
else if (code == GLFW_OUT_OF_MEMORY)
strcpy(description, "Out of memory");
else if (code == GLFW_API_UNAVAILABLE)
strcpy(description, "The requested API is unavailable");
else if (code == GLFW_VERSION_UNAVAILABLE)
strcpy(description, "The requested API version is unavailable");
else if (code == GLFW_PLATFORM_ERROR)
strcpy(description, "A platform-specific error occurred");
else if (code == GLFW_FORMAT_UNAVAILABLE)
strcpy(description, "The requested format is unavailable");
else if (code == GLFW_NO_WINDOW_CONTEXT)
strcpy(description, "The specified window has no context");
else
strcpy(description, "ERROR: UNKNOWN GLFW ERROR");
}
if (_glfw.initialized)
{
error = _glfwPlatformGetTls(&_glfw.errorSlot);
if (!error)
{
error = calloc(1, sizeof(_GLFWerror));
_glfwPlatformSetTls(&_glfw.errorSlot, error);
_glfwPlatformLockMutex(&_glfw.errorLock);
error->next = _glfw.errorListHead;
_glfw.errorListHead = error;
_glfwPlatformUnlockMutex(&_glfw.errorLock);
}
}
else
error = &_glfwMainThreadError;
error->code = code;
strcpy(error->description, description);
if (_glfwErrorCallback)
_glfwErrorCallback(code, description);
}
//////////////////////////////////////////////////////////////////////////
////// GLFW public API //////
//////////////////////////////////////////////////////////////////////////
GLFWAPI int glfwInit(void)
{
if (_glfw.initialized)
return GLFW_TRUE;
memset(&_glfw, 0, sizeof(_glfw));
_glfw.hints.init = _glfwInitHints;
if (!_glfwPlatformInit())
{
terminate();
return GLFW_FALSE;
}
if (!_glfwPlatformCreateMutex(&_glfw.errorLock) ||
!_glfwPlatformCreateTls(&_glfw.errorSlot) ||
!_glfwPlatformCreateTls(&_glfw.contextSlot))
{
terminate();
return GLFW_FALSE;
}
_glfwPlatformSetTls(&_glfw.errorSlot, &_glfwMainThreadError);
_glfw.initialized = GLFW_TRUE;
_glfw.timer.offset = _glfwPlatformGetTimerValue();
glfwDefaultWindowHints();
{
int i;
for (i = 0; _glfwDefaultMappings[i]; i++)
{
if (!glfwUpdateGamepadMappings(_glfwDefaultMappings[i]))
{
terminate();
return GLFW_FALSE;
}
}
}
return GLFW_TRUE;
}
GLFWAPI void glfwTerminate(void)
{
if (!_glfw.initialized)
return;
terminate();
}
GLFWAPI void glfwInitHint(int hint, int value)
{
switch (hint)
{
case GLFW_JOYSTICK_HAT_BUTTONS:
_glfwInitHints.hatButtons = value;
return;
case GLFW_COCOA_CHDIR_RESOURCES:
_glfwInitHints.ns.chdir = value;
return;
case GLFW_COCOA_MENUBAR:
_glfwInitHints.ns.menubar = value;
return;
}
_glfwInputError(GLFW_INVALID_ENUM,
"Invalid init hint 0x%08X", hint);
}
GLFWAPI void glfwGetVersion(int* major, int* minor, int* rev)
{
if (major != NULL)
*major = GLFW_VERSION_MAJOR;
if (minor != NULL)
*minor = GLFW_VERSION_MINOR;
if (rev != NULL)
*rev = GLFW_VERSION_REVISION;
}
GLFWAPI const char* glfwGetVersionString(void)
{
return _glfwPlatformGetVersionString();
}
GLFWAPI int glfwGetError(const char** description)
{
_GLFWerror* error;
int code = GLFW_NO_ERROR;
if (description)
*description = NULL;
if (_glfw.initialized)
error = _glfwPlatformGetTls(&_glfw.errorSlot);
else
error = &_glfwMainThreadError;
if (error)
{
code = error->code;
error->code = GLFW_NO_ERROR;
if (description && code)
*description = error->description;
}
return code;
}
GLFWAPI GLFWerrorfun glfwSetErrorCallback(GLFWerrorfun cbfun)
{
_GLFW_SWAP_POINTERS(_glfwErrorCallback, cbfun);
return cbfun;
}