ebiten/internal/cglfw/internal.h

// SPDX-License-Identifier: Apache-2.0
// SPDX-FileCopyrightText: 2002-2006 Marcus Geelnard
// SPDX-FileCopyrightText: 2006-2019 Camilla Löwy <elmindreda@glfw.org>
// SPDX-FileCopyrightText: 2023 The Ebitengine Authors

//go:build darwin || freebsd || linux || netbsd || openbsd

#pragma once

#if defined(_GLFW_USE_CONFIG_H)
 #include "glfw_config.h"
#endif

#if defined(GLFW_INCLUDE_GLCOREARB) || \
    defined(GLFW_INCLUDE_ES1)       || \
    defined(GLFW_INCLUDE_ES2)       || \
    defined(GLFW_INCLUDE_ES3)       || \
    defined(GLFW_INCLUDE_ES31)      || \
    defined(GLFW_INCLUDE_ES32)      || \
    defined(GLFW_INCLUDE_NONE)      || \
    defined(GLFW_INCLUDE_GLEXT)     || \
    defined(GLFW_INCLUDE_GLU)       || \
    defined(GLFW_DLL)
 #error "You must not define any header option macros when compiling GLFW"
#endif

#define GLFW_INCLUDE_NONE
#include "glfw3.h"

#define _GLFW_INSERT_FIRST      0
#define _GLFW_INSERT_LAST       1

#define _GLFW_POLL_PRESENCE     0
#define _GLFW_POLL_AXES         1
#define _GLFW_POLL_BUTTONS      2
#define _GLFW_POLL_ALL          (_GLFW_POLL_AXES | _GLFW_POLL_BUTTONS)

#define _GLFW_MESSAGE_SIZE      1024

typedef int GLFWbool;

typedef struct _GLFWerror       _GLFWerror;
typedef struct _GLFWinitconfig  _GLFWinitconfig;
typedef struct _GLFWwndconfig   _GLFWwndconfig;
typedef struct _GLFWctxconfig   _GLFWctxconfig;
typedef struct _GLFWfbconfig    _GLFWfbconfig;
typedef struct _GLFWcontext     _GLFWcontext;
typedef struct _GLFWwindow      _GLFWwindow;
typedef struct _GLFWlibrary     _GLFWlibrary;
typedef struct _GLFWmonitor     _GLFWmonitor;
typedef struct _GLFWcursor      _GLFWcursor;
typedef struct _GLFWmapelement  _GLFWmapelement;
typedef struct _GLFWtls         _GLFWtls;
typedef struct _GLFWmutex       _GLFWmutex;

typedef void (* _GLFWmakecontextcurrentfun)(_GLFWwindow*);
typedef void (* _GLFWswapbuffersfun)(_GLFWwindow*);
typedef void (* _GLFWswapintervalfun)(int);
typedef int (* _GLFWextensionsupportedfun)(const char*);
typedef GLFWglproc (* _GLFWgetprocaddressfun)(const char*);
typedef void (* _GLFWdestroycontextfun)(_GLFWwindow*);

#define GL_VERSION 0x1f02
#define GL_NONE 0
#define GL_COLOR_BUFFER_BIT 0x00004000
#define GL_UNSIGNED_BYTE 0x1401
#define GL_EXTENSIONS 0x1f03
#define GL_NUM_EXTENSIONS 0x821d
#define GL_CONTEXT_FLAGS 0x821e
#define GL_CONTEXT_FLAG_FORWARD_COMPATIBLE_BIT 0x00000001
#define GL_CONTEXT_FLAG_DEBUG_BIT 0x00000002
#define GL_CONTEXT_PROFILE_MASK 0x9126
#define GL_CONTEXT_COMPATIBILITY_PROFILE_BIT 0x00000002
#define GL_CONTEXT_CORE_PROFILE_BIT 0x00000001
#define GL_RESET_NOTIFICATION_STRATEGY_ARB 0x8256
#define GL_LOSE_CONTEXT_ON_RESET_ARB 0x8252
#define GL_NO_RESET_NOTIFICATION_ARB 0x8261
#define GL_CONTEXT_RELEASE_BEHAVIOR 0x82fb
#define GL_CONTEXT_RELEASE_BEHAVIOR_FLUSH 0x82fc
#define GL_CONTEXT_FLAG_NO_ERROR_BIT_KHR 0x00000008

typedef int GLint;
typedef unsigned int GLuint;
typedef unsigned int GLenum;
typedef unsigned int GLbitfield;
typedef unsigned char GLubyte;

typedef void (APIENTRY * PFNGLCLEARPROC)(GLbitfield);
typedef const GLubyte* (APIENTRY * PFNGLGETSTRINGPROC)(GLenum);
typedef void (APIENTRY * PFNGLGETINTEGERVPROC)(GLenum,GLint*);
typedef const GLubyte* (APIENTRY * PFNGLGETSTRINGIPROC)(GLenum,GLuint);

#if defined(_GLFW_COCOA)
 #include "cocoa_platform_darwin.h"
#elif defined(_GLFW_X11)
 #include "x11_platform_linbsd.h"
#elif defined(_GLFW_WAYLAND)
 #include "wl_platform_linbsd.h"
#else
 #error "No supported window creation API selected"
#endif

// Constructs a version number string from the public header macros
#define _GLFW_CONCAT_VERSION(m, n, r) #m "." #n "." #r
#define _GLFW_MAKE_VERSION(m, n, r) _GLFW_CONCAT_VERSION(m, n, r)
#define _GLFW_VERSION_NUMBER _GLFW_MAKE_VERSION(GLFW_VERSION_MAJOR, \
                                                GLFW_VERSION_MINOR, \
                                                GLFW_VERSION_REVISION)

// Checks for whether the library has been initialized
#define _GLFW_REQUIRE_INIT()                         \
    if (!_glfw.initialized)                          \
    {                                                \
        _glfwInputError(GLFW_NOT_INITIALIZED, NULL); \
        return;                                      \
    }
#define _GLFW_REQUIRE_INIT_OR_RETURN(x)              \
    if (!_glfw.initialized)                          \
    {                                                \
        _glfwInputError(GLFW_NOT_INITIALIZED, NULL); \
        return x;                                    \
    }

// Swaps the provided pointers
#define _GLFW_SWAP_POINTERS(x, y) \
    {                             \
        void* t;                  \
        t = x;                    \
        x = y;                    \
        y = t;                    \
    }

// Per-thread error structure
//
struct _GLFWerror
{
    _GLFWerror*     next;
    int             code;
    char            description[_GLFW_MESSAGE_SIZE];
};

// Initialization configuration
//
// Parameters relating to the initialization of the library
//
struct _GLFWinitconfig
{
    struct {
        GLFWbool  menubar;
        GLFWbool  chdir;
    } ns;
};

// Window configuration
//
// Parameters relating to the creation of the window but not directly related
// to the framebuffer.  This is used to pass window creation parameters from
// shared code to the platform API.
//
struct _GLFWwndconfig
{
    int           width;
    int           height;
    const char*   title;
    GLFWbool      resizable;
    GLFWbool      visible;
    GLFWbool      decorated;
    GLFWbool      focused;
    GLFWbool      autoIconify;
    GLFWbool      floating;
    GLFWbool      maximized;
    GLFWbool      centerCursor;
    GLFWbool      focusOnShow;
    GLFWbool      scaleToMonitor;
    struct {
        GLFWbool  retina;
        char      frameName[256];
    } ns;
    struct {
        char      className[256];
        char      instanceName[256];
    } x11;
};

// Context configuration
//
// Parameters relating to the creation of the context but not directly related
// to the framebuffer.  This is used to pass context creation parameters from
// shared code to the platform API.
//
struct _GLFWctxconfig
{
    int           client;
    int           source;
    int           major;
    int           minor;
    GLFWbool      forward;
    GLFWbool      debug;
    GLFWbool      noerror;
    int           profile;
    int           robustness;
    int           release;
    _GLFWwindow*  share;
    struct {
        GLFWbool  offline;
    } nsgl;
};

// Framebuffer configuration
//
// This describes buffers and their sizes.  It also contains
// a platform-specific ID used to map back to the backend API object.
//
// It is used to pass framebuffer parameters from shared code to the platform
// API and also to enumerate and select available framebuffer configs.
//
struct _GLFWfbconfig
{
    int         redBits;
    int         greenBits;
    int         blueBits;
    int         alphaBits;
    int         depthBits;
    int         stencilBits;
    int         accumRedBits;
    int         accumGreenBits;
    int         accumBlueBits;
    int         accumAlphaBits;
    int         auxBuffers;
    GLFWbool    stereo;
    int         samples;
    GLFWbool    sRGB;
    GLFWbool    doublebuffer;
    GLFWbool    transparent;
    uintptr_t   handle;
};

// Context structure
//
struct _GLFWcontext
{
    int                 client;
    int                 source;
    int                 major, minor, revision;
    GLFWbool            forward, debug, noerror;
    int                 profile;
    int                 robustness;
    int                 release;

    PFNGLGETSTRINGIPROC  GetStringi;
    PFNGLGETINTEGERVPROC GetIntegerv;
    PFNGLGETSTRINGPROC   GetString;

    _GLFWmakecontextcurrentfun  makeCurrent;
    _GLFWswapbuffersfun         swapBuffers;
    _GLFWswapintervalfun        swapInterval;
    _GLFWextensionsupportedfun  extensionSupported;
    _GLFWgetprocaddressfun      getProcAddress;
    _GLFWdestroycontextfun      destroy;

    // This is defined in the context API's context.h
    _GLFW_PLATFORM_CONTEXT_STATE;
    // This is defined in egl_context.h
    _GLFW_EGL_CONTEXT_STATE;
    // This is defined in osmesa_context.h
    _GLFW_OSMESA_CONTEXT_STATE;
};

// Window and context structure
//
struct _GLFWwindow
{
    struct _GLFWwindow* next;

    // Window settings and state
    GLFWbool            resizable;
    GLFWbool            decorated;
    GLFWbool            autoIconify;
    GLFWbool            floating;
    GLFWbool            focusOnShow;
    GLFWbool            shouldClose;
    void*               userPointer;
    GLFWbool            doublebuffer;
    GLFWvidmode         videoMode;
    _GLFWmonitor*       monitor;
    _GLFWcursor*        cursor;

    int                 minwidth, minheight;
    int                 maxwidth, maxheight;
    int                 numer, denom;

    GLFWbool            stickyKeys;
    GLFWbool            stickyMouseButtons;
    GLFWbool            lockKeyMods;
    int                 cursorMode;
    char                mouseButtons[GLFW_MOUSE_BUTTON_LAST + 1];
    char                keys[GLFW_KEY_LAST + 1];
    // Virtual cursor position when cursor is disabled
    double              virtualCursorPosX, virtualCursorPosY;
    GLFWbool            rawMouseMotion;

    _GLFWcontext        context;

    struct {
        GLFWwindowposfun          pos;
        GLFWwindowsizefun         size;
        GLFWwindowclosefun        close;
        GLFWwindowrefreshfun      refresh;
        GLFWwindowfocusfun        focus;
        GLFWwindowiconifyfun      iconify;
        GLFWwindowmaximizefun     maximize;
        GLFWframebuffersizefun    fbsize;
        GLFWwindowcontentscalefun scale;
        GLFWmousebuttonfun        mouseButton;
        GLFWcursorposfun          cursorPos;
        GLFWcursorenterfun        cursorEnter;
        GLFWscrollfun             scroll;
        GLFWkeyfun                key;
        GLFWcharfun               character;
        GLFWcharmodsfun           charmods;
        GLFWdropfun               drop;
    } callbacks;

    // This is defined in the window API's platform.h
    _GLFW_PLATFORM_WINDOW_STATE;
};

// Monitor structure
//
struct _GLFWmonitor
{
    char            name[128];
    void*           userPointer;

    // Physical dimensions in millimeters.
    int             widthMM, heightMM;

    // The window whose video mode is current on this monitor
    _GLFWwindow*    window;

    GLFWvidmode*    modes;
    int             modeCount;
    GLFWvidmode     currentMode;

    GLFWgammaramp   originalRamp;
    GLFWgammaramp   currentRamp;

    // This is defined in the window API's platform.h
    _GLFW_PLATFORM_MONITOR_STATE;
};

// Cursor structure
//
struct _GLFWcursor
{
    _GLFWcursor*    next;

    // This is defined in the window API's platform.h
    _GLFW_PLATFORM_CURSOR_STATE;
};

// Thread local storage structure
//
struct _GLFWtls
{
    // This is defined in the platform's thread.h
    _GLFW_PLATFORM_TLS_STATE;
};

// Mutex structure
//
struct _GLFWmutex
{
    // This is defined in the platform's thread.h
    _GLFW_PLATFORM_MUTEX_STATE;
};

// Library global data
//
struct _GLFWlibrary
{
    GLFWbool            initialized;

    struct {
        _GLFWinitconfig init;
        _GLFWfbconfig   framebuffer;
        _GLFWwndconfig  window;
        _GLFWctxconfig  context;
        int             refreshRate;
    } hints;

    _GLFWerror*         errorListHead;
    _GLFWcursor*        cursorListHead;
    _GLFWwindow*        windowListHead;

    _GLFWmonitor**      monitors;
    int                 monitorCount;

    _GLFWtls            errorSlot;
    _GLFWtls            contextSlot;
    _GLFWmutex          errorLock;

    struct {
        uint64_t        offset;
        // This is defined in the platform's time.h
        _GLFW_PLATFORM_LIBRARY_TIMER_STATE;
    } timer;

    struct {
        GLFWmonitorfun  monitor;
    } callbacks;

    // This is defined in the window API's platform.h
    _GLFW_PLATFORM_LIBRARY_WINDOW_STATE;
    // This is defined in the context API's context.h
    _GLFW_PLATFORM_LIBRARY_CONTEXT_STATE;
    // This is defined in egl_context.h
    _GLFW_EGL_LIBRARY_CONTEXT_STATE;
    // This is defined in osmesa_context.h
    _GLFW_OSMESA_LIBRARY_CONTEXT_STATE;
};

// Global state shared between compilation units of GLFW
//
extern _GLFWlibrary _glfw;


//////////////////////////////////////////////////////////////////////////
//////                       GLFW platform API                      //////
//////////////////////////////////////////////////////////////////////////

int _glfwPlatformInit(void);
void _glfwPlatformTerminate(void);
const char* _glfwPlatformGetVersionString(void);

void _glfwPlatformGetCursorPos(_GLFWwindow* window, double* xpos, double* ypos);
void _glfwPlatformSetCursorPos(_GLFWwindow* window, double xpos, double ypos);
void _glfwPlatformSetCursorMode(_GLFWwindow* window, int mode);
void _glfwPlatformSetRawMouseMotion(_GLFWwindow *window, GLFWbool enabled);
GLFWbool _glfwPlatformRawMouseMotionSupported(void);
int _glfwPlatformCreateCursor(_GLFWcursor* cursor,
                              const GLFWimage* image, int xhot, int yhot);
int _glfwPlatformCreateStandardCursor(_GLFWcursor* cursor, int shape);
void _glfwPlatformDestroyCursor(_GLFWcursor* cursor);
void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor);

const char* _glfwPlatformGetScancodeName(int scancode);
int _glfwPlatformGetKeyScancode(int key);

void _glfwPlatformFreeMonitor(_GLFWmonitor* monitor);
void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos);
void _glfwPlatformGetMonitorContentScale(_GLFWmonitor* monitor,
                                         float* xscale, float* yscale);
void _glfwPlatformGetMonitorWorkarea(_GLFWmonitor* monitor, int* xpos, int* ypos, int *width, int *height);
GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count);
void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode);
GLFWbool _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp);
void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp);

void _glfwPlatformSetClipboardString(const char* string);
const char* _glfwPlatformGetClipboardString(void);

uint64_t _glfwPlatformGetTimerValue(void);
uint64_t _glfwPlatformGetTimerFrequency(void);

int _glfwPlatformCreateWindow(_GLFWwindow* window,
                              const _GLFWwndconfig* wndconfig,
                              const _GLFWctxconfig* ctxconfig,
                              const _GLFWfbconfig* fbconfig);
void _glfwPlatformDestroyWindow(_GLFWwindow* window);
void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title);
void _glfwPlatformSetWindowIcon(_GLFWwindow* window,
                                int count, const GLFWimage* images);
void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos);
void _glfwPlatformSetWindowPos(_GLFWwindow* window, int xpos, int ypos);
void _glfwPlatformGetWindowSize(_GLFWwindow* window, int* width, int* height);
void _glfwPlatformSetWindowSize(_GLFWwindow* window, int width, int height);
void _glfwPlatformSetWindowSizeLimits(_GLFWwindow* window,
                                      int minwidth, int minheight,
                                      int maxwidth, int maxheight);
void _glfwPlatformSetWindowAspectRatio(_GLFWwindow* window, int numer, int denom);
void _glfwPlatformGetFramebufferSize(_GLFWwindow* window, int* width, int* height);
void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window,
                                     int* left, int* top,
                                     int* right, int* bottom);
void _glfwPlatformGetWindowContentScale(_GLFWwindow* window,
                                        float* xscale, float* yscale);
void _glfwPlatformIconifyWindow(_GLFWwindow* window);
void _glfwPlatformRestoreWindow(_GLFWwindow* window);
void _glfwPlatformMaximizeWindow(_GLFWwindow* window);
void _glfwPlatformShowWindow(_GLFWwindow* window);
void _glfwPlatformHideWindow(_GLFWwindow* window);
void _glfwPlatformRequestWindowAttention(_GLFWwindow* window);
void _glfwPlatformFocusWindow(_GLFWwindow* window);
void _glfwPlatformSetWindowMonitor(_GLFWwindow* window, _GLFWmonitor* monitor,
                                   int xpos, int ypos, int width, int height,
                                   int refreshRate);
int _glfwPlatformWindowFocused(_GLFWwindow* window);
int _glfwPlatformWindowIconified(_GLFWwindow* window);
int _glfwPlatformWindowVisible(_GLFWwindow* window);
int _glfwPlatformWindowMaximized(_GLFWwindow* window);
int _glfwPlatformWindowHovered(_GLFWwindow* window);
int _glfwPlatformFramebufferTransparent(_GLFWwindow* window);
float _glfwPlatformGetWindowOpacity(_GLFWwindow* window);
void _glfwPlatformSetWindowResizable(_GLFWwindow* window, GLFWbool enabled);
void _glfwPlatformSetWindowDecorated(_GLFWwindow* window, GLFWbool enabled);
void _glfwPlatformSetWindowFloating(_GLFWwindow* window, GLFWbool enabled);
void _glfwPlatformSetWindowOpacity(_GLFWwindow* window, float opacity);

void _glfwPlatformPollEvents(void);
void _glfwPlatformWaitEvents(void);
void _glfwPlatformWaitEventsTimeout(double timeout);
void _glfwPlatformPostEmptyEvent(void);

GLFWbool _glfwPlatformCreateTls(_GLFWtls* tls);
void _glfwPlatformDestroyTls(_GLFWtls* tls);
void* _glfwPlatformGetTls(_GLFWtls* tls);
void _glfwPlatformSetTls(_GLFWtls* tls, void* value);

GLFWbool _glfwPlatformCreateMutex(_GLFWmutex* mutex);
void _glfwPlatformDestroyMutex(_GLFWmutex* mutex);
void _glfwPlatformLockMutex(_GLFWmutex* mutex);
void _glfwPlatformUnlockMutex(_GLFWmutex* mutex);


//////////////////////////////////////////////////////////////////////////
//////                         GLFW event API                       //////
//////////////////////////////////////////////////////////////////////////

void _glfwInputWindowFocus(_GLFWwindow* window, GLFWbool focused);
void _glfwInputWindowPos(_GLFWwindow* window, int xpos, int ypos);
void _glfwInputWindowSize(_GLFWwindow* window, int width, int height);
void _glfwInputFramebufferSize(_GLFWwindow* window, int width, int height);
void _glfwInputWindowContentScale(_GLFWwindow* window,
                                  float xscale, float yscale);
void _glfwInputWindowIconify(_GLFWwindow* window, GLFWbool iconified);
void _glfwInputWindowMaximize(_GLFWwindow* window, GLFWbool maximized);
void _glfwInputWindowDamage(_GLFWwindow* window);
void _glfwInputWindowCloseRequest(_GLFWwindow* window);
void _glfwInputWindowMonitor(_GLFWwindow* window, _GLFWmonitor* monitor);

void _glfwInputKey(_GLFWwindow* window,
                   int key, int scancode, int action, int mods);
void _glfwInputChar(_GLFWwindow* window,
                    uint32_t codepoint, int mods, GLFWbool plain);
void _glfwInputScroll(_GLFWwindow* window, double xoffset, double yoffset);
void _glfwInputMouseClick(_GLFWwindow* window, int button, int action, int mods);
void _glfwInputCursorPos(_GLFWwindow* window, double xpos, double ypos);
void _glfwInputCursorEnter(_GLFWwindow* window, GLFWbool entered);
void _glfwInputDrop(_GLFWwindow* window, int count, const char** names);

void _glfwInputMonitor(_GLFWmonitor* monitor, int action, int placement);
void _glfwInputMonitorWindow(_GLFWmonitor* monitor, _GLFWwindow* window);

#if defined(__GNUC__)
void _glfwInputError(int code, const char* format, ...)
    __attribute__((format(printf, 2, 3)));
#else
void _glfwInputError(int code, const char* format, ...);
#endif


//////////////////////////////////////////////////////////////////////////
//////                       GLFW internal API                      //////
//////////////////////////////////////////////////////////////////////////

GLFWbool _glfwStringInExtensionString(const char* string, const char* extensions);
const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
                                         const _GLFWfbconfig* alternatives,
                                         unsigned int count);
GLFWbool _glfwRefreshContextAttribs(_GLFWwindow* window,
                                    const _GLFWctxconfig* ctxconfig);
GLFWbool _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig);

const GLFWvidmode* _glfwChooseVideoMode(_GLFWmonitor* monitor,
                                        const GLFWvidmode* desired);
int _glfwCompareVideoModes(const GLFWvidmode* first, const GLFWvidmode* second);
_GLFWmonitor* _glfwAllocMonitor(const char* name, int widthMM, int heightMM);
void _glfwFreeMonitor(_GLFWmonitor* monitor);
void _glfwAllocGammaArrays(GLFWgammaramp* ramp, unsigned int size);
void _glfwFreeGammaArrays(GLFWgammaramp* ramp);
void _glfwSplitBPP(int bpp, int* red, int* green, int* blue);

void _glfwCenterCursorInContentArea(_GLFWwindow* window);

size_t _glfwEncodeUTF8(char* s, uint32_t codepoint);
char** _glfwParseUriList(char* text, int* count);

char* _glfw_strdup(const char* source);
int _glfw_min(int a, int b);
int _glfw_max(int a, int b);
float _glfw_fminf(float a, float b);
float _glfw_fmaxf(float a, float b);