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glfw/src/internal.h
Camilla Berglund 6b8d490249 Make all client API functions dynamically loaded
2015-08-12 01:01:42 +02:00

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//========================================================================
// GLFW 3.1 - 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 _glfw3_internal_h_
#define _glfw3_internal_h_
#if defined(_GLFW_USE_CONFIG_H)
#include "glfw_config.h"
#endif
#define _GLFW_VERSION_NUMBER "3.1.2"
#if defined(GLFW_INCLUDE_GLCOREARB) || \
defined(GLFW_INCLUDE_ES1) || \
defined(GLFW_INCLUDE_ES2) || \
defined(GLFW_INCLUDE_ES3) || \
defined(GLFW_INCLUDE_NONE) || \
defined(GLFW_INCLUDE_GLEXT) || \
defined(GLFW_INCLUDE_GLU) || \
defined(GLFW_DLL)
#error "You may not define any header option macros when compiling GLFW"
#endif
#if defined(_GLFW_USE_OPENGL)
// This is the default for glfw3.h
#elif defined(_GLFW_USE_GLESV1)
#define GLFW_INCLUDE_ES1
#elif defined(_GLFW_USE_GLESV2)
#define GLFW_INCLUDE_ES2
#else
#error "No supported client library selected"
#endif
// Disable the inclusion of the platform glext.h by gl.h to allow proper
// inclusion of our own, newer glext.h below
#define GL_GLEXT_LEGACY
#include "../include/GLFW/glfw3.h"
#if defined(_GLFW_USE_OPENGL)
// This path may need to be changed if you build GLFW using your own setup
// GLFW comes with its own copy of glext.h since it uses fairly new extensions
// and not all development environments come with an up-to-date version
#include "../deps/GL/glext.h"
#endif
typedef void (APIENTRY * PFNGLCLEARPROC)(GLbitfield);
typedef const GLubyte* (APIENTRY * PFNGLGETSTRINGPROC)(GLenum);
typedef void (APIENTRY * PFNGLGETINTEGERVPROC)(GLenum,GLint*);
typedef struct _GLFWwndconfig _GLFWwndconfig;
typedef struct _GLFWctxconfig _GLFWctxconfig;
typedef struct _GLFWfbconfig _GLFWfbconfig;
typedef struct _GLFWwindow _GLFWwindow;
typedef struct _GLFWlibrary _GLFWlibrary;
typedef struct _GLFWmonitor _GLFWmonitor;
typedef struct _GLFWcursor _GLFWcursor;
#if defined(_GLFW_COCOA)
#include "cocoa_platform.h"
#elif defined(_GLFW_WIN32)
#include "win32_platform.h"
#elif defined(_GLFW_X11)
#include "x11_platform.h"
#elif defined(_GLFW_WAYLAND)
#include "wl_platform.h"
#elif defined(_GLFW_MIR)
#include "mir_platform.h"
#else
#error "No supported window creation API selected"
#endif
//========================================================================
// Doxygen group definitions
//========================================================================
/*! @defgroup platform Platform interface
* @brief The interface implemented by the platform-specific code.
*
* The platform API is the interface exposed by the platform-specific code for
* each platform and is called by the shared code of the public API It mirrors
* the public API except it uses objects instead of handles.
*/
/*! @defgroup event Event interface
* @brief The interface used by the platform-specific code to report events.
*
* The event API is used by the platform-specific code to notify the shared
* code of events that can be translated into state changes and/or callback
* calls.
*/
/*! @defgroup utility Utility functions
* @brief Various utility functions for internal use.
*
* These functions are shared code and may be used by any part of GLFW
* Each platform may add its own utility functions, but those may only be
* called by the platform-specific code
*/
//========================================================================
// Helper macros
//========================================================================
// Checks for whether the library has been initialized
#define _GLFW_REQUIRE_INIT() \
if (!_glfwInitialized) \
{ \
_glfwInputError(GLFW_NOT_INITIALIZED, NULL); \
return; \
}
#define _GLFW_REQUIRE_INIT_OR_RETURN(x) \
if (!_glfwInitialized) \
{ \
_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; \
}
//========================================================================
// Platform-independent structures
//========================================================================
/*! @brief 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;
GLboolean resizable;
GLboolean visible;
GLboolean decorated;
GLboolean focused;
GLboolean autoIconify;
GLboolean floating;
_GLFWmonitor* monitor;
};
/*! @brief 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 api;
int major;
int minor;
GLboolean forward;
GLboolean debug;
int profile;
int robustness;
int release;
_GLFWwindow* share;
};
/*! @brief 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;
int stereo;
int samples;
int sRGB;
int doublebuffer;
// This is defined in the context API's context.h
_GLFW_PLATFORM_FBCONFIG;
};
/*! @brief Window and context structure.
*/
struct _GLFWwindow
{
struct _GLFWwindow* next;
// Window settings and state
GLboolean resizable;
GLboolean decorated;
GLboolean autoIconify;
GLboolean floating;
GLboolean closed;
void* userPointer;
GLFWvidmode videoMode;
_GLFWmonitor* monitor;
_GLFWcursor* cursor;
// Window input state
GLboolean stickyKeys;
GLboolean stickyMouseButtons;
double cursorPosX, cursorPosY;
int cursorMode;
char mouseButtons[GLFW_MOUSE_BUTTON_LAST + 1];
char keys[GLFW_KEY_LAST + 1];
// OpenGL extensions and context attributes
struct {
int api;
int major, minor, revision;
GLboolean forward, debug;
int profile;
int robustness;
int release;
} context;
#if defined(_GLFW_USE_OPENGL)
PFNGLGETSTRINGIPROC GetStringi;
#endif
PFNGLGETINTEGERVPROC GetIntegerv;
PFNGLGETSTRINGPROC GetString;
PFNGLCLEARPROC Clear;
struct {
GLFWwindowposfun pos;
GLFWwindowsizefun size;
GLFWwindowclosefun close;
GLFWwindowrefreshfun refresh;
GLFWwindowfocusfun focus;
GLFWwindowiconifyfun iconify;
GLFWframebuffersizefun fbsize;
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;
// This is defined in the context API's context.h
_GLFW_PLATFORM_CONTEXT_STATE;
};
/*! @brief Monitor structure.
*/
struct _GLFWmonitor
{
char* name;
// Physical dimensions in millimeters.
int widthMM, heightMM;
GLFWvidmode* modes;
int modeCount;
GLFWvidmode currentMode;
GLFWgammaramp originalRamp;
GLFWgammaramp currentRamp;
// This is defined in the window API's platform.h
_GLFW_PLATFORM_MONITOR_STATE;
};
/*! @brief Cursor structure
*/
struct _GLFWcursor
{
_GLFWcursor* next;
// This is defined in the window API's platform.h
_GLFW_PLATFORM_CURSOR_STATE;
};
/*! @brief Library global data.
*/
struct _GLFWlibrary
{
struct {
_GLFWfbconfig framebuffer;
_GLFWwndconfig window;
_GLFWctxconfig context;
int refreshRate;
} hints;
double cursorPosX, cursorPosY;
_GLFWcursor* cursorListHead;
_GLFWwindow* windowListHead;
_GLFWwindow* cursorWindow;
_GLFWmonitor** monitors;
int monitorCount;
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 the platform's time.h
_GLFW_PLATFORM_LIBRARY_TIME_STATE;
// This is defined in the platform's joystick.h
_GLFW_PLATFORM_LIBRARY_JOYSTICK_STATE;
// This is defined in the platform's tls.h
_GLFW_PLATFORM_LIBRARY_TLS_STATE;
};
//========================================================================
// Global state shared between compilation units of GLFW
//========================================================================
/*! @brief Flag indicating whether GLFW has been successfully initialized.
*/
extern GLboolean _glfwInitialized;
/*! @brief All global data protected by @ref _glfwInitialized.
* This should only be touched after a call to @ref glfwInit that has not been
* followed by a call to @ref glfwTerminate.
*/
extern _GLFWlibrary _glfw;
//========================================================================
// Platform API functions
//========================================================================
/*! @brief Initializes the platform-specific part of the library.
* @return `GL_TRUE` if successful, or `GL_FALSE` if an error occurred.
* @ingroup platform
*/
int _glfwPlatformInit(void);
/*! @brief Terminates the platform-specific part of the library.
* @ingroup platform
*/
void _glfwPlatformTerminate(void);
/*! @copydoc glfwGetVersionString
* @ingroup platform
*
* @note The returned string must be available for the duration of the program.
*
* @note The returned string must not change for the duration of the program.
*/
const char* _glfwPlatformGetVersionString(void);
/*! @copydoc glfwGetCursorPos
* @ingroup platform
*/
void _glfwPlatformGetCursorPos(_GLFWwindow* window, double* xpos, double* ypos);
/*! @copydoc glfwSetCursorPos
* @ingroup platform
*/
void _glfwPlatformSetCursorPos(_GLFWwindow* window, double xpos, double ypos);
/*! @brief Applies the cursor mode of the specified window to the system.
* @param[in] window The window whose cursor mode to apply.
* @ingroup platform
*/
void _glfwPlatformApplyCursorMode(_GLFWwindow* window);
/*! @copydoc glfwGetMonitors
* @ingroup platform
*/
_GLFWmonitor** _glfwPlatformGetMonitors(int* count);
/*! @brief Checks whether two monitor objects represent the same monitor.
*
* @param[in] first The first monitor.
* @param[in] second The second monitor.
* @return @c GL_TRUE if the monitor objects represent the same monitor, or @c
* GL_FALSE otherwise.
* @ingroup platform
*/
GLboolean _glfwPlatformIsSameMonitor(_GLFWmonitor* first, _GLFWmonitor* second);
/*! @copydoc glfwGetMonitorPos
* @ingroup platform
*/
void _glfwPlatformGetMonitorPos(_GLFWmonitor* monitor, int* xpos, int* ypos);
/*! @copydoc glfwGetVideoModes
* @ingroup platform
*/
GLFWvidmode* _glfwPlatformGetVideoModes(_GLFWmonitor* monitor, int* count);
/*! @ingroup platform
*/
void _glfwPlatformGetVideoMode(_GLFWmonitor* monitor, GLFWvidmode* mode);
/*! @copydoc glfwGetGammaRamp
* @ingroup platform
*/
void _glfwPlatformGetGammaRamp(_GLFWmonitor* monitor, GLFWgammaramp* ramp);
/*! @copydoc glfwSetGammaRamp
* @ingroup platform
*/
void _glfwPlatformSetGammaRamp(_GLFWmonitor* monitor, const GLFWgammaramp* ramp);
/*! @copydoc glfwSetClipboardString
* @ingroup platform
*/
void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string);
/*! @copydoc glfwGetClipboardString
* @ingroup platform
*
* @note The returned string must be valid until the next call to @ref
* _glfwPlatformGetClipboardString or @ref _glfwPlatformSetClipboardString.
*/
const char* _glfwPlatformGetClipboardString(_GLFWwindow* window);
/*! @copydoc glfwJoystickPresent
* @ingroup platform
*/
int _glfwPlatformJoystickPresent(int joy);
/*! @copydoc glfwGetJoystickAxes
* @ingroup platform
*/
const float* _glfwPlatformGetJoystickAxes(int joy, int* count);
/*! @copydoc glfwGetJoystickButtons
* @ingroup platform
*/
const unsigned char* _glfwPlatformGetJoystickButtons(int joy, int* count);
/*! @copydoc glfwGetJoystickName
* @ingroup platform
*/
const char* _glfwPlatformGetJoystickName(int joy);
/*! @copydoc glfwGetTime
* @ingroup platform
*/
double _glfwPlatformGetTime(void);
/*! @copydoc glfwSetTime
* @ingroup platform
*/
void _glfwPlatformSetTime(double time);
/*! @ingroup platform
*/
int _glfwPlatformCreateWindow(_GLFWwindow* window,
const _GLFWwndconfig* wndconfig,
const _GLFWctxconfig* ctxconfig,
const _GLFWfbconfig* fbconfig);
/*! @ingroup platform
*/
void _glfwPlatformDestroyWindow(_GLFWwindow* window);
/*! @copydoc glfwSetWindowTitle
* @ingroup platform
*/
void _glfwPlatformSetWindowTitle(_GLFWwindow* window, const char* title);
/*! @copydoc glfwGetWindowPos
* @ingroup platform
*/
void _glfwPlatformGetWindowPos(_GLFWwindow* window, int* xpos, int* ypos);
/*! @copydoc glfwSetWindowPos
* @ingroup platform
*/
void _glfwPlatformSetWindowPos(_GLFWwindow* window, int xpos, int ypos);
/*! @copydoc glfwGetWindowSize
* @ingroup platform
*/
void _glfwPlatformGetWindowSize(_GLFWwindow* window, int* width, int* height);
/*! @copydoc glfwSetWindowSize
* @ingroup platform
*/
void _glfwPlatformSetWindowSize(_GLFWwindow* window, int width, int height);
/*! @copydoc glfwGetFramebufferSize
* @ingroup platform
*/
void _glfwPlatformGetFramebufferSize(_GLFWwindow* window, int* width, int* height);
/*! @copydoc glfwGetWindowFrameSize
* @ingroup platform
*/
void _glfwPlatformGetWindowFrameSize(_GLFWwindow* window, int* left, int* top, int* right, int* bottom);
/*! @copydoc glfwIconifyWindow
* @ingroup platform
*/
void _glfwPlatformIconifyWindow(_GLFWwindow* window);
/*! @copydoc glfwRestoreWindow
* @ingroup platform
*/
void _glfwPlatformRestoreWindow(_GLFWwindow* window);
/*! @copydoc glfwShowWindow
* @ingroup platform
*/
void _glfwPlatformShowWindow(_GLFWwindow* window);
/*! @ingroup platform
*/
void _glfwPlatformUnhideWindow(_GLFWwindow* window);
/*! @copydoc glfwHideWindow
* @ingroup platform
*/
void _glfwPlatformHideWindow(_GLFWwindow* window);
/*! @brief Returns whether the window is focused.
* @ingroup platform
*/
int _glfwPlatformWindowFocused(_GLFWwindow* window);
/*! @brief Returns whether the window is iconified.
* @ingroup platform
*/
int _glfwPlatformWindowIconified(_GLFWwindow* window);
/*! @brief Returns whether the window is visible.
* @ingroup platform
*/
int _glfwPlatformWindowVisible(_GLFWwindow* window);
/*! @copydoc glfwPollEvents
* @ingroup platform
*/
void _glfwPlatformPollEvents(void);
/*! @copydoc glfwWaitEvents
* @ingroup platform
*/
void _glfwPlatformWaitEvents(void);
/*! @copydoc glfwPostEmptyEvent
* @ingroup platform
*/
void _glfwPlatformPostEmptyEvent(void);
/*! @copydoc glfwMakeContextCurrent
* @ingroup platform
*/
void _glfwPlatformMakeContextCurrent(_GLFWwindow* window);
/*! @copydoc glfwGetCurrentContext
* @ingroup platform
*/
_GLFWwindow* _glfwPlatformGetCurrentContext(void);
/*! @copydoc glfwSwapBuffers
* @ingroup platform
*/
void _glfwPlatformSwapBuffers(_GLFWwindow* window);
/*! @copydoc glfwSwapInterval
* @ingroup platform
*/
void _glfwPlatformSwapInterval(int interval);
/*! @copydoc glfwExtensionSupported
* @ingroup platform
*/
int _glfwPlatformExtensionSupported(const char* extension);
/*! @copydoc glfwGetProcAddress
* @ingroup platform
*/
GLFWglproc _glfwPlatformGetProcAddress(const char* procname);
/*! @copydoc glfwCreateCursor
* @ingroup platform
*/
int _glfwPlatformCreateCursor(_GLFWcursor* cursor, const GLFWimage* image, int xhot, int yhot);
/*! @copydoc glfwCreateStandardCursor
* @ingroup platform
*/
int _glfwPlatformCreateStandardCursor(_GLFWcursor* cursor, int shape);
/*! @copydoc glfwDestroyCursor
* @ingroup platform
*/
void _glfwPlatformDestroyCursor(_GLFWcursor* cursor);
/*! @copydoc glfwSetCursor
* @ingroup platform
*/
void _glfwPlatformSetCursor(_GLFWwindow* window, _GLFWcursor* cursor);
//========================================================================
// Event API functions
//========================================================================
/*! @brief Notifies shared code of a window focus event.
* @param[in] window The window that received the event.
* @param[in] focused `GL_TRUE` if the window received focus, or `GL_FALSE`
* if it lost focus.
* @ingroup event
*/
void _glfwInputWindowFocus(_GLFWwindow* window, GLboolean focused);
/*! @brief Notifies shared code of a window movement event.
* @param[in] window The window that received the event.
* @param[in] xpos The new x-coordinate of the client area of the window.
* @param[in] ypos The new y-coordinate of the client area of the window.
* @ingroup event
*/
void _glfwInputWindowPos(_GLFWwindow* window, int xpos, int ypos);
/*! @brief Notifies shared code of a window resize event.
* @param[in] window The window that received the event.
* @param[in] width The new width of the client area of the window.
* @param[in] height The new height of the client area of the window.
* @ingroup event
*/
void _glfwInputWindowSize(_GLFWwindow* window, int width, int height);
/*! @brief Notifies shared code of a framebuffer resize event.
* @param[in] window The window that received the event.
* @param[in] width The new width, in pixels, of the framebuffer.
* @param[in] height The new height, in pixels, of the framebuffer.
* @ingroup event
*/
void _glfwInputFramebufferSize(_GLFWwindow* window, int width, int height);
/*! @brief Notifies shared code of a window iconification event.
* @param[in] window The window that received the event.
* @param[in] iconified `GL_TRUE` if the window was iconified, or `GL_FALSE`
* if it was restored.
* @ingroup event
*/
void _glfwInputWindowIconify(_GLFWwindow* window, int iconified);
/*! @brief Notifies shared code of a window damage event.
* @param[in] window The window that received the event.
*/
void _glfwInputWindowDamage(_GLFWwindow* window);
/*! @brief Notifies shared code of a window close request event
* @param[in] window The window that received the event.
* @ingroup event
*/
void _glfwInputWindowCloseRequest(_GLFWwindow* window);
/*! @brief Notifies shared code of a physical key event.
* @param[in] window The window that received the event.
* @param[in] key The key that was pressed or released.
* @param[in] scancode The system-specific scan code of the key.
* @param[in] action @ref GLFW_PRESS or @ref GLFW_RELEASE.
* @param[in] mods The modifiers pressed when the event was generated.
* @ingroup event
*/
void _glfwInputKey(_GLFWwindow* window, int key, int scancode, int action, int mods);
/*! @brief Notifies shared code of a Unicode character input event.
* @param[in] window The window that received the event.
* @param[in] codepoint The Unicode code point of the input character.
* @param[in] mods Bit field describing which modifier keys were held down.
* @param[in] plain `GL_TRUE` if the character is regular text input, or
* `GL_FALSE` otherwise.
* @ingroup event
*/
void _glfwInputChar(_GLFWwindow* window, unsigned int codepoint, int mods, int plain);
/*! @brief Notifies shared code of a scroll event.
* @param[in] window The window that received the event.
* @param[in] x The scroll offset along the x-axis.
* @param[in] y The scroll offset along the y-axis.
* @ingroup event
*/
void _glfwInputScroll(_GLFWwindow* window, double x, double y);
/*! @brief Notifies shared code of a mouse button click event.
* @param[in] window The window that received the event.
* @param[in] button The button that was pressed or released.
* @param[in] action @ref GLFW_PRESS or @ref GLFW_RELEASE.
* @ingroup event
*/
void _glfwInputMouseClick(_GLFWwindow* window, int button, int action, int mods);
/*! @brief Notifies shared code of a cursor motion event.
* @param[in] window The window that received the event.
* @param[in] x The new x-coordinate of the cursor, relative to the left edge
* of the client area of the window.
* @param[in] y The new y-coordinate of the cursor, relative to the top edge
* of the client area of the window.
* @ingroup event
*/
void _glfwInputCursorMotion(_GLFWwindow* window, double x, double y);
/*! @brief Notifies shared code of a cursor enter/leave event.
* @param[in] window The window that received the event.
* @param[in] entered `GL_TRUE` if the cursor entered the client area of the
* window, or `GL_FALSE` if it left it.
* @ingroup event
*/
void _glfwInputCursorEnter(_GLFWwindow* window, int entered);
/*! @ingroup event
*/
void _glfwInputMonitorChange(void);
/*! @brief Notifies shared code of an error.
* @param[in] error The error code most suitable for the error.
* @param[in] format The `printf` style format string of the error
* description.
* @ingroup event
*/
void _glfwInputError(int error, const char* format, ...);
/*! @brief Notifies dropped object over window.
* @param[in] window The window that received the event.
* @param[in] count The number of dropped objects.
* @param[in] names The names of the dropped objects.
* @ingroup event
*/
void _glfwInputDrop(_GLFWwindow* window, int count, const char** names);
//========================================================================
// Utility functions
//========================================================================
/*! @ingroup utility
*/
const GLFWvidmode* _glfwChooseVideoMode(_GLFWmonitor* monitor,
const GLFWvidmode* desired);
/*! @brief Performs lexical comparison between two @ref GLFWvidmode structures.
* @ingroup utility
*/
int _glfwCompareVideoModes(const GLFWvidmode* first, const GLFWvidmode* second);
/*! @brief Splits a color depth into red, green and blue bit depths.
* @ingroup utility
*/
void _glfwSplitBPP(int bpp, int* red, int* green, int* blue);
/*! @brief Searches an extension string for the specified extension.
* @param[in] string The extension string to search.
* @param[in] extensions The extension to search for.
* @return `GL_TRUE` if the extension was found, or `GL_FALSE` otherwise.
* @ingroup utility
*/
int _glfwStringInExtensionString(const char* string, const char* extensions);
/*! @brief Chooses the framebuffer config that best matches the desired one.
* @param[in] desired The desired framebuffer config.
* @param[in] alternatives The framebuffer configs supported by the system.
* @param[in] count The number of entries in the alternatives array.
* @return The framebuffer config most closely matching the desired one, or @c
* NULL if none fulfilled the hard constraints of the desired values.
* @ingroup utility
*/
const _GLFWfbconfig* _glfwChooseFBConfig(const _GLFWfbconfig* desired,
const _GLFWfbconfig* alternatives,
unsigned int count);
/*! @brief Retrieves the attributes of the current context.
* @param[in] ctxconfig The desired context attributes.
* @return `GL_TRUE` if successful, or `GL_FALSE` if the context is unusable.
* @ingroup utility
*/
GLboolean _glfwRefreshContextAttribs(const _GLFWctxconfig* ctxconfig);
/*! @brief Checks whether the desired context attributes are valid.
* @param[in] ctxconfig The context attributes to check.
* @return `GL_TRUE` if the context attributes are valid, or `GL_FALSE`
* otherwise.
* @ingroup utility
*
* This function checks things like whether the specified client API version
* exists and whether all relevant options have supported and non-conflicting
* values.
*/
GLboolean _glfwIsValidContextConfig(const _GLFWctxconfig* ctxconfig);
/*! @brief Checks whether the current context fulfils the specified hard
* constraints.
* @param[in] ctxconfig The desired context attributes.
* @return `GL_TRUE` if the context fulfils the hard constraints, or `GL_FALSE`
* otherwise.
* @ingroup utility
*/
GLboolean _glfwIsValidContext(const _GLFWctxconfig* ctxconfig);
/*! @ingroup utility
*/
void _glfwAllocGammaArrays(GLFWgammaramp* ramp, unsigned int size);
/*! @ingroup utility
*/
void _glfwFreeGammaArrays(GLFWgammaramp* ramp);
/*! @brief Allocates and returns a monitor object with the specified name
* and dimensions.
* @param[in] name The name of the monitor.
* @param[in] widthMM The width, in mm, of the monitor's display area.
* @param[in] heightMM The height, in mm, of the monitor's display area.
* @return The newly created object.
* @ingroup utility
*/
_GLFWmonitor* _glfwAllocMonitor(const char* name, int widthMM, int heightMM);
/*! @brief Frees a monitor object and any data associated with it.
* @ingroup utility
*/
void _glfwFreeMonitor(_GLFWmonitor* monitor);
/*! @ingroup utility
*/
void _glfwFreeMonitors(_GLFWmonitor** monitors, int count);
#endif // _glfw3_internal_h_
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