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//========================================================================
// GLFW 3.5 - 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.
//
//========================================================================
#include "internal.h"
#include <string.h>
#include <stdlib.h>
// These construct a string literal from individual numeric constants
#define _GLFW_CONCAT_VERSION(m, n, r) #m "." #n "." #r
#define _GLFW_MAKE_VERSION(m, n, r) _GLFW_CONCAT_VERSION(m, n, r)
//////////////////////////////////////////////////////////////////////////
////// GLFW internal API //////
//////////////////////////////////////////////////////////////////////////
static const struct
{
int ID;
GLFWbool (*connect)(int,_GLFWplatform*);
} supportedPlatforms[] =
{
#if defined(_GLFW_WIN32)
{ GLFW_PLATFORM_WIN32, _glfwConnectWin32 },
#endif
#if defined(_GLFW_COCOA)
{ GLFW_PLATFORM_COCOA, _glfwConnectCocoa },
#endif
#if defined(_GLFW_WAYLAND)
{ GLFW_PLATFORM_WAYLAND, _glfwConnectWayland },
#endif
#if defined(_GLFW_X11)
{ GLFW_PLATFORM_X11, _glfwConnectX11 },
#endif
};
GLFWbool _glfwSelectPlatform(int desiredID, _GLFWplatform* platform)
{
const size_t count = sizeof(supportedPlatforms) / sizeof(supportedPlatforms[0]);
size_t i;
if (desiredID != GLFW_ANY_PLATFORM &&
desiredID != GLFW_PLATFORM_WIN32 &&
desiredID != GLFW_PLATFORM_COCOA &&
desiredID != GLFW_PLATFORM_WAYLAND &&
desiredID != GLFW_PLATFORM_X11 &&
desiredID != GLFW_PLATFORM_NULL)
{
_glfwInputError(GLFW_INVALID_ENUM, "Invalid platform ID 0x%08X", desiredID);
return GLFW_FALSE;
}
// Only allow the Null platform if specifically requested
if (desiredID == GLFW_PLATFORM_NULL)
return _glfwConnectNull(desiredID, platform);
else if (count == 0)
{
_glfwInputError(GLFW_PLATFORM_UNAVAILABLE, "This binary only supports the Null platform");
return GLFW_FALSE;
}
#if defined(_GLFW_WAYLAND) && defined(_GLFW_X11)
if (desiredID == GLFW_ANY_PLATFORM)
{
const char* const session = getenv("XDG_SESSION_TYPE");
if (session)
{
// Only follow XDG_SESSION_TYPE if it is set correctly and the
// environment looks plausble; otherwise fall back to detection
if (strcmp(session, "wayland") == 0 && getenv("WAYLAND_DISPLAY"))
desiredID = GLFW_PLATFORM_WAYLAND;
else if (strcmp(session, "x11") == 0 && getenv("DISPLAY"))
desiredID = GLFW_PLATFORM_X11;
}
}
#endif
if (desiredID == GLFW_ANY_PLATFORM)
{
// If there is exactly one platform available for auto-selection, let it emit the
// error on failure as the platform-specific error description may be more helpful
if (count == 1)
return supportedPlatforms[0].connect(supportedPlatforms[0].ID, platform);
for (i = 0; i < count; i++)
{
if (supportedPlatforms[i].connect(desiredID, platform))
return GLFW_TRUE;
}
_glfwInputError(GLFW_PLATFORM_UNAVAILABLE, "Failed to detect any supported platform");
}
else
{
for (i = 0; i < count; i++)
{
if (supportedPlatforms[i].ID == desiredID)
return supportedPlatforms[i].connect(desiredID, platform);
}
_glfwInputError(GLFW_PLATFORM_UNAVAILABLE, "The requested platform is not supported");
}
return GLFW_FALSE;
}
//////////////////////////////////////////////////////////////////////////
////// GLFW public API //////
//////////////////////////////////////////////////////////////////////////
GLFWAPI int glfwGetPlatform(void)
{
_GLFW_REQUIRE_INIT_OR_RETURN(0);
return _glfw.platform.platformID;
}
GLFWAPI int glfwPlatformSupported(int platformID)
{
const size_t count = sizeof(supportedPlatforms) / sizeof(supportedPlatforms[0]);
size_t i;
if (platformID != GLFW_PLATFORM_WIN32 &&
platformID != GLFW_PLATFORM_COCOA &&
platformID != GLFW_PLATFORM_WAYLAND &&
platformID != GLFW_PLATFORM_X11 &&
platformID != GLFW_PLATFORM_NULL)
{
_glfwInputError(GLFW_INVALID_ENUM, "Invalid platform ID 0x%08X", platformID);
return GLFW_FALSE;
}
if (platformID == GLFW_PLATFORM_NULL)
return GLFW_TRUE;
for (i = 0; i < count; i++)
{
if (platformID == supportedPlatforms[i].ID)
return GLFW_TRUE;
}
return GLFW_FALSE;
}
GLFWAPI const char* glfwGetVersionString(void)
{
return _GLFW_MAKE_VERSION(GLFW_VERSION_MAJOR,
GLFW_VERSION_MINOR,
GLFW_VERSION_REVISION)
#if defined(_GLFW_WIN32)
" Win32 WGL"
#endif
#if defined(_GLFW_COCOA)
" Cocoa NSGL"
#endif
#if defined(_GLFW_WAYLAND)
" Wayland"
#endif
#if defined(_GLFW_X11)
" X11 GLX"
#endif
" Null"
" EGL"
" OSMesa"
#if defined(__MINGW64_VERSION_MAJOR)
" MinGW-w64"
#elif defined(__MINGW32__)
" MinGW"
#elif defined(_MSC_VER)
" VisualC"
#endif
#if defined(_GLFW_USE_HYBRID_HPG) || defined(_GLFW_USE_OPTIMUS_HPG)
" hybrid-GPU"
#endif
#if defined(_POSIX_MONOTONIC_CLOCK)
" monotonic"
#endif
#if defined(_GLFW_BUILD_DLL)
#if defined(_WIN32)
" DLL"
#elif defined(__APPLE__)
" dynamic"
#else
" shared"
#endif
#endif
;
}
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