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A multi-platform library for OpenGL, OpenGL ES, Vulkan, window and input
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glfw/src/x11_platform.h

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//========================================================================
// GLFW - An OpenGL library
// Platform: X11/GLX
// API version: 3.0
// WWW: http://www.glfw.org/
//------------------------------------------------------------------------
// Copyright (c) 2002-2006 Marcus Geelnard
// Copyright (c) 2006-2010 Camilla Berglund <elmindreda@elmindreda.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.
//
//========================================================================
#ifndef _platform_h_
#define _platform_h_
#include <unistd.h>
#include <signal.h>
#include <stdint.h>
#include <X11/Xlib.h>
#include <X11/keysym.h>
#include <X11/Xatom.h>
#define GLX_GLXEXT_LEGACY
#include <GL/glx.h>
// This path may need to be changed if you build GLFW using your own setup
// GLFW comes with its own copy of glxext.h since it uses some fairly new
// extensions and not all operating systems come with an up-to-date version
#include "../support/GL/glxext.h"
// The XF86VidMode extension provides mode setting and gamma control
#if defined(_GLFW_HAS_XF86VIDMODE)
#include <X11/extensions/xf86vmode.h>
#endif
// The XRandR extension provides mode setting and gamma control
#if defined(_GLFW_HAS_XRANDR)
#include <X11/extensions/Xrandr.h>
#endif
// dlopen is used as a fallback function retrieval mechanism
#if defined(_GLFW_HAS_DLOPEN)
#include <dlfcn.h>
#endif
// The Xkb extension provides improved keyboard support
#if defined(_GLFW_HAS_XKB)
#include <X11/XKBlib.h>
#endif
// GLFW supports four different ways for getting addresses for GL/GLX
// extension functions: glXGetProcAddress, glXGetProcAddressARB,
// glXGetProcAddressEXT, and dlsym
#if defined(_GLFW_HAS_GLXGETPROCADDRESSARB)
#define _glfw_glXGetProcAddress(x) glXGetProcAddressARB(x)
#elif defined(_GLFW_HAS_GLXGETPROCADDRESS)
#define _glfw_glXGetProcAddress(x) glXGetProcAddress(x)
#elif defined(_GLFW_HAS_GLXGETPROCADDRESSEXT)
#define _glfw_glXGetProcAddress(x) glXGetProcAddressEXT(x)
#elif defined(_GLFW_HAS_DLOPEN)
#define _glfw_glXGetProcAddress(x) dlsym(_glfwLibrary.GLX.libGL, x)
#define _GLFW_DLOPEN_LIBGL
#else
#error "No OpenGL entry point retrieval mechanism was enabled"
#endif
#define _GLFW_PLATFORM_WINDOW_STATE _GLFWwindowX11 X11
#define _GLFW_PLATFORM_CONTEXT_STATE _GLFWcontextGLX GLX
#define _GLFW_PLATFORM_MONITOR_STATE _GLFWmonitorX11 X11
#define _GLFW_PLATFORM_LIBRARY_WINDOW_STATE _GLFWlibraryX11 X11
#define _GLFW_PLATFORM_LIBRARY_OPENGL_STATE _GLFWlibraryGLX GLX
// Clipboard format atom indices
#define _GLFW_CLIPBOARD_FORMAT_UTF8 0
#define _GLFW_CLIPBOARD_FORMAT_COMPOUND 1
#define _GLFW_CLIPBOARD_FORMAT_STRING 2
#define _GLFW_CLIPBOARD_FORMAT_COUNT 3
// Clipboard conversion status tokens
#define _GLFW_CONVERSION_INACTIVE 0
#define _GLFW_CONVERSION_SUCCEEDED 1
#define _GLFW_CONVERSION_FAILED 2
#ifndef GLX_MESA_swap_control
typedef int (*PFNGLXSWAPINTERVALMESAPROC)(int);
#endif
//========================================================================
// GLFW platform specific types
//========================================================================
//------------------------------------------------------------------------
// Pointer length integer
//------------------------------------------------------------------------
typedef intptr_t GLFWintptr;
//------------------------------------------------------------------------
// Platform-specific OpenGL context structure
//------------------------------------------------------------------------
typedef struct _GLFWcontextGLX
{
GLXContext context; // OpenGL rendering context
XVisualInfo* visual; // Visual for selected GLXFBConfig
} _GLFWcontextGLX;
//------------------------------------------------------------------------
// Platform-specific window structure
//------------------------------------------------------------------------
typedef struct _GLFWwindowX11
{
// Platform specific window resources
Colormap colormap; // Window colormap
Window handle; // Window handle
// Various platform specific internal variables
GLboolean overrideRedirect; // True if window is OverrideRedirect
GLboolean keyboardGrabbed; // True if keyboard is currently grabbed
GLboolean cursorGrabbed; // True if cursor is currently grabbed
GLboolean cursorHidden; // True if cursor is currently hidden
GLboolean cursorCentered; // True if cursor was moved since last poll
int cursorPosX, cursorPosY;
} _GLFWwindowX11;
//------------------------------------------------------------------------
// Platform-specific library global data for X11
//------------------------------------------------------------------------
typedef struct _GLFWlibraryX11
{
Display* display;
int screen;
Window root;
Cursor cursor; // Invisible cursor for hidden cursor
Atom wmDeleteWindow; // WM_DELETE_WINDOW atom
Atom wmName; // _NET_WM_NAME atom
Atom wmIconName; // _NET_WM_ICON_NAME atom
Atom wmPing; // _NET_WM_PING atom
Atom wmState; // _NET_WM_STATE atom
Atom wmStateFullscreen; // _NET_WM_STATE_FULLSCREEN atom
Atom wmActiveWindow; // _NET_ACTIVE_WINDOW atom
// True if window manager supports EWMH
GLboolean hasEWMH;
struct {
GLboolean available;
int eventBase;
int errorBase;
} VidMode;
struct {
GLboolean available;
int eventBase;
int errorBase;
int majorVersion;
int minorVersion;
GLboolean gammaBroken;
} RandR;
struct {
GLboolean available;
int majorOpcode;
int eventBase;
int errorBase;
int majorVersion;
int minorVersion;
} Xkb;
// Key code LUT (mapping X11 key codes to GLFW key codes)
int keyCodeLUT[256];
// Screensaver data
struct {
GLboolean changed;
int timeout;
int interval;
int blanking;
int exposure;
} saver;
// Fullscreen data
struct {
GLboolean modeChanged;
#if defined(_GLFW_HAS_XRANDR)
SizeID oldSizeID;
int oldWidth;
int oldHeight;
Rotation oldRotation;
#endif /*_GLFW_HAS_XRANDR*/
#if defined(_GLFW_HAS_XF86VIDMODE)
XF86VidModeModeInfo oldMode;
#endif /*_GLFW_HAS_XF86VIDMODE*/
} FS;
// Timer data
struct {
GLboolean monotonic;
double resolution;
uint64_t base;
} timer;
// Selection data
struct {
Atom atom;
Atom formats[_GLFW_CLIPBOARD_FORMAT_COUNT];
char* string;
Atom target;
Atom targets;
Atom property;
int status;
} selection;
struct {
int present;
int fd;
int numAxes;
int numButtons;
float* axis;
unsigned char* button;
} joystick[GLFW_JOYSTICK_LAST + 1];
} _GLFWlibraryX11;
//------------------------------------------------------------------------
// Platform-specific library global data for GLX
//------------------------------------------------------------------------
typedef struct _GLFWlibraryGLX
{
// Server-side GLX version
int majorVersion, minorVersion;
// GLX extensions
PFNGLXSWAPINTERVALSGIPROC SwapIntervalSGI;
PFNGLXSWAPINTERVALEXTPROC SwapIntervalEXT;
PFNGLXSWAPINTERVALMESAPROC SwapIntervalMESA;
PFNGLXGETFBCONFIGATTRIBSGIXPROC GetFBConfigAttribSGIX;
PFNGLXCHOOSEFBCONFIGSGIXPROC ChooseFBConfigSGIX;
PFNGLXCREATECONTEXTWITHCONFIGSGIXPROC CreateContextWithConfigSGIX;
PFNGLXGETVISUALFROMFBCONFIGSGIXPROC GetVisualFromFBConfigSGIX;
PFNGLXCREATECONTEXTATTRIBSARBPROC CreateContextAttribsARB;
GLboolean SGIX_fbconfig;
GLboolean SGI_swap_control;
GLboolean EXT_swap_control;
GLboolean MESA_swap_control;
GLboolean ARB_multisample;
GLboolean ARB_create_context;
GLboolean ARB_create_context_profile;
GLboolean ARB_create_context_robustness;
GLboolean EXT_create_context_es2_profile;
#if defined(_GLFW_DLOPEN_LIBGL)
void* libGL; // dlopen handle for libGL.so
#endif
} _GLFWlibraryGLX;
//------------------------------------------------------------------------
// Platform-specific window structure
//------------------------------------------------------------------------
typedef struct _GLFWmonitorX11
{
#if defined(_GLFW_HAS_XRANDR)
XRROutputInfo* output;
#else
int dummy;
#endif /*_GLFW_HAS_XRANDR*/
} _GLFWmonitorX11;
//========================================================================
// Prototypes for platform specific internal functions
//========================================================================
// Time
void _glfwInitTimer(void);
// Gamma
void _glfwInitGammaRamp(void);
void _glfwTerminateGammaRamp(void);
// OpenGL support
int _glfwInitOpenGL(void);
void _glfwTerminateOpenGL(void);
int _glfwCreateContext(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWfbconfig* fbconfig);
void _glfwDestroyContext(_GLFWwindow* window);
XVisualInfo* _glfwGetContextVisual(_GLFWwindow* window);
// Fullscreen support
int _glfwGetClosestVideoMode(int* width, int* height, int* rate);
void _glfwSetVideoModeMODE(int mode, int rate);
void _glfwSetVideoMode(int* width, int* height, int* rate);
void _glfwRestoreVideoMode(void);
// Joystick input
int _glfwInitJoysticks(void);
void _glfwTerminateJoysticks(void);
// Unicode support
long _glfwKeySym2Unicode(KeySym keysym);
// Clipboard handling
GLboolean _glfwReadSelection(XSelectionEvent* request);
Atom _glfwWriteSelection(XSelectionRequestEvent* request);
// Event processing
void _glfwProcessPendingEvents(void);
#endif // _platform_h_