glfw/include/GLFW/glfw3native.h
Camilla Löwy ce85c7dcaf Fix GLAPIENTRY not being defined for native access
This is a follow-up to 535c3ce632.

That commit made glfw3native.h undefine GLAPIENTRY whenever
GLFW_EXPOSE_NATIVE_GLX or GLFW_EXPOSE_NATIVE_OSMESA was defined, on the
assumption that it was glfw3.h that had defined GLAPIENTRY.

If gl.h or an extension loader header has been included before glfw3.h,
then it has defined inclusion guards preventing GLAPIENTRY from being
defined later when the GLX or OSMesa header includes gl.h.

This commit ensures GLAPIENTRY is only undefined if glfw3.h defined it.

Related to #2010
2022-05-06 19:18:47 +02:00

615 lines
19 KiB
Objective-C

/*************************************************************************
* GLFW 3.4 - www.glfw.org
* A library for OpenGL, window and input
*------------------------------------------------------------------------
* 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.
*
*************************************************************************/
#ifndef _glfw3_native_h_
#define _glfw3_native_h_
#ifdef __cplusplus
extern "C" {
#endif
/*************************************************************************
* Doxygen documentation
*************************************************************************/
/*! @file glfw3native.h
* @brief The header of the native access functions.
*
* This is the header file of the native access functions. See @ref native for
* more information.
*/
/*! @defgroup native Native access
* @brief Functions related to accessing native handles.
*
* **By using the native access functions you assert that you know what you're
* doing and how to fix problems caused by using them. If you don't, you
* shouldn't be using them.**
*
* Before the inclusion of @ref glfw3native.h, you may define zero or more
* window system API macro and zero or more context creation API macros.
*
* The chosen backends must match those the library was compiled for. Failure
* to do this will cause a link-time error.
*
* The available window API macros are:
* * `GLFW_EXPOSE_NATIVE_WIN32`
* * `GLFW_EXPOSE_NATIVE_COCOA`
* * `GLFW_EXPOSE_NATIVE_X11`
* * `GLFW_EXPOSE_NATIVE_WAYLAND`
*
* The available context API macros are:
* * `GLFW_EXPOSE_NATIVE_WGL`
* * `GLFW_EXPOSE_NATIVE_NSGL`
* * `GLFW_EXPOSE_NATIVE_GLX`
* * `GLFW_EXPOSE_NATIVE_EGL`
* * `GLFW_EXPOSE_NATIVE_OSMESA`
*
* These macros select which of the native access functions that are declared
* and which platform-specific headers to include. It is then up your (by
* definition platform-specific) code to handle which of these should be
* defined.
*/
/*************************************************************************
* System headers and types
*************************************************************************/
#if defined(GLFW_EXPOSE_NATIVE_WIN32) || defined(GLFW_EXPOSE_NATIVE_WGL)
/* This is a workaround for the fact that glfw3.h needs to export APIENTRY (for
* example to allow applications to correctly declare a GL_KHR_debug callback)
* but windows.h assumes no one will define APIENTRY before it does
*/
#if defined(GLFW_APIENTRY_DEFINED)
#undef APIENTRY
#undef GLFW_APIENTRY_DEFINED
#endif
#include <windows.h>
#elif defined(GLFW_EXPOSE_NATIVE_COCOA) || defined(GLFW_EXPOSE_NATIVE_NSGL)
#if defined(__OBJC__)
#import <Cocoa/Cocoa.h>
#else
#include <ApplicationServices/ApplicationServices.h>
typedef void* id;
#endif
#elif defined(GLFW_EXPOSE_NATIVE_X11) || defined(GLFW_EXPOSE_NATIVE_GLX)
#include <X11/Xlib.h>
#include <X11/extensions/Xrandr.h>
#elif defined(GLFW_EXPOSE_NATIVE_WAYLAND)
#include <wayland-client.h>
#endif
#if defined(GLFW_EXPOSE_NATIVE_WGL)
/* WGL is declared by windows.h */
#endif
#if defined(GLFW_EXPOSE_NATIVE_NSGL)
/* NSGL is declared by Cocoa.h */
#endif
#if defined(GLFW_EXPOSE_NATIVE_GLX)
/* This is a workaround for the fact that glfw3.h defines GLAPIENTRY because by
* default it also acts as an OpenGL header
* However, glx.h will include gl.h, which will define it unconditionally
*/
#if defined(GLFW_GLAPIENTRY_DEFINED)
#undef GLAPIENTRY
#undef GLFW_GLAPIENTRY_DEFINED
#endif
#include <GL/glx.h>
#endif
#if defined(GLFW_EXPOSE_NATIVE_EGL)
#include <EGL/egl.h>
#endif
#if defined(GLFW_EXPOSE_NATIVE_OSMESA)
/* This is a workaround for the fact that glfw3.h defines GLAPIENTRY because by
* default it also acts as an OpenGL header
* However, osmesa.h will include gl.h, which will define it unconditionally
*/
#if defined(GLFW_GLAPIENTRY_DEFINED)
#undef GLAPIENTRY
#undef GLFW_GLAPIENTRY_DEFINED
#endif
#include <GL/osmesa.h>
#endif
/*************************************************************************
* Functions
*************************************************************************/
#if defined(GLFW_EXPOSE_NATIVE_WIN32)
/*! @brief Returns the adapter device name of the specified monitor.
*
* @return The UTF-8 encoded adapter device name (for example `\\.\DISPLAY1`)
* of the specified monitor, or `NULL` if an [error](@ref error_handling)
* occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.1.
*
* @ingroup native
*/
GLFWAPI const char* glfwGetWin32Adapter(GLFWmonitor* monitor);
/*! @brief Returns the display device name of the specified monitor.
*
* @return The UTF-8 encoded display device name (for example
* `\\.\DISPLAY1\Monitor0`) of the specified monitor, or `NULL` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.1.
*
* @ingroup native
*/
GLFWAPI const char* glfwGetWin32Monitor(GLFWmonitor* monitor);
/*! @brief Returns the `HWND` of the specified window.
*
* @return The `HWND` of the specified window, or `NULL` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @remark The `HDC` associated with the window can be queried with the
* [GetDC](https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getdc)
* function.
* @code
* HDC dc = GetDC(glfwGetWin32Window(window));
* @endcode
* This DC is private and does not need to be released.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI HWND glfwGetWin32Window(GLFWwindow* window);
#endif
#if defined(GLFW_EXPOSE_NATIVE_WGL)
/*! @brief Returns the `HGLRC` of the specified window.
*
* @return The `HGLRC` of the specified window, or `NULL` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NO_WINDOW_CONTEXT and @ref
* GLFW_NOT_INITIALIZED.
*
* @remark The `HDC` associated with the window can be queried with the
* [GetDC](https://docs.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-getdc)
* function.
* @code
* HDC dc = GetDC(glfwGetWin32Window(window));
* @endcode
* This DC is private and does not need to be released.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI HGLRC glfwGetWGLContext(GLFWwindow* window);
#endif
#if defined(GLFW_EXPOSE_NATIVE_COCOA)
/*! @brief Returns the `CGDirectDisplayID` of the specified monitor.
*
* @return The `CGDirectDisplayID` of the specified monitor, or
* `kCGNullDirectDisplay` if an [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.1.
*
* @ingroup native
*/
GLFWAPI CGDirectDisplayID glfwGetCocoaMonitor(GLFWmonitor* monitor);
/*! @brief Returns the `NSWindow` of the specified window.
*
* @return The `NSWindow` of the specified window, or `nil` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI id glfwGetCocoaWindow(GLFWwindow* window);
#endif
#if defined(GLFW_EXPOSE_NATIVE_NSGL)
/*! @brief Returns the `NSOpenGLContext` of the specified window.
*
* @return The `NSOpenGLContext` of the specified window, or `nil` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NO_WINDOW_CONTEXT and @ref
* GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI id glfwGetNSGLContext(GLFWwindow* window);
#endif
#if defined(GLFW_EXPOSE_NATIVE_X11)
/*! @brief Returns the `Display` used by GLFW.
*
* @return The `Display` used by GLFW, or `NULL` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI Display* glfwGetX11Display(void);
/*! @brief Returns the `RRCrtc` of the specified monitor.
*
* @return The `RRCrtc` of the specified monitor, or `None` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.1.
*
* @ingroup native
*/
GLFWAPI RRCrtc glfwGetX11Adapter(GLFWmonitor* monitor);
/*! @brief Returns the `RROutput` of the specified monitor.
*
* @return The `RROutput` of the specified monitor, or `None` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.1.
*
* @ingroup native
*/
GLFWAPI RROutput glfwGetX11Monitor(GLFWmonitor* monitor);
/*! @brief Returns the `Window` of the specified window.
*
* @return The `Window` of the specified window, or `None` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI Window glfwGetX11Window(GLFWwindow* window);
/*! @brief Sets the current primary selection to the specified string.
*
* @param[in] string A UTF-8 encoded string.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
* GLFW_PLATFORM_ERROR.
*
* @pointer_lifetime The specified string is copied before this function
* returns.
*
* @thread_safety This function must only be called from the main thread.
*
* @sa @ref clipboard
* @sa glfwGetX11SelectionString
* @sa glfwSetClipboardString
*
* @since Added in version 3.3.
*
* @ingroup native
*/
GLFWAPI void glfwSetX11SelectionString(const char* string);
/*! @brief Returns the contents of the current primary selection as a string.
*
* If the selection is empty or if its contents cannot be converted, `NULL`
* is returned and a @ref GLFW_FORMAT_UNAVAILABLE error is generated.
*
* @return The contents of the selection as a UTF-8 encoded string, or `NULL`
* if an [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED and @ref
* GLFW_PLATFORM_ERROR.
*
* @pointer_lifetime The returned string is allocated and freed by GLFW. You
* should not free it yourself. It is valid until the next call to @ref
* glfwGetX11SelectionString or @ref glfwSetX11SelectionString, or until the
* library is terminated.
*
* @thread_safety This function must only be called from the main thread.
*
* @sa @ref clipboard
* @sa glfwSetX11SelectionString
* @sa glfwGetClipboardString
*
* @since Added in version 3.3.
*
* @ingroup native
*/
GLFWAPI const char* glfwGetX11SelectionString(void);
#endif
#if defined(GLFW_EXPOSE_NATIVE_GLX)
/*! @brief Returns the `GLXContext` of the specified window.
*
* @return The `GLXContext` of the specified window, or `NULL` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NO_WINDOW_CONTEXT and @ref
* GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI GLXContext glfwGetGLXContext(GLFWwindow* window);
/*! @brief Returns the `GLXWindow` of the specified window.
*
* @return The `GLXWindow` of the specified window, or `None` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NO_WINDOW_CONTEXT and @ref
* GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.2.
*
* @ingroup native
*/
GLFWAPI GLXWindow glfwGetGLXWindow(GLFWwindow* window);
#endif
#if defined(GLFW_EXPOSE_NATIVE_WAYLAND)
/*! @brief Returns the `struct wl_display*` used by GLFW.
*
* @return The `struct wl_display*` used by GLFW, or `NULL` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.2.
*
* @ingroup native
*/
GLFWAPI struct wl_display* glfwGetWaylandDisplay(void);
/*! @brief Returns the `struct wl_output*` of the specified monitor.
*
* @return The `struct wl_output*` of the specified monitor, or `NULL` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.2.
*
* @ingroup native
*/
GLFWAPI struct wl_output* glfwGetWaylandMonitor(GLFWmonitor* monitor);
/*! @brief Returns the main `struct wl_surface*` of the specified window.
*
* @return The main `struct wl_surface*` of the specified window, or `NULL` if
* an [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.2.
*
* @ingroup native
*/
GLFWAPI struct wl_surface* glfwGetWaylandWindow(GLFWwindow* window);
#endif
#if defined(GLFW_EXPOSE_NATIVE_EGL)
/*! @brief Returns the `EGLDisplay` used by GLFW.
*
* @return The `EGLDisplay` used by GLFW, or `EGL_NO_DISPLAY` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NOT_INITIALIZED.
*
* @remark Because EGL is initialized on demand, this function will return
* `EGL_NO_DISPLAY` until the first context has been created via EGL.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI EGLDisplay glfwGetEGLDisplay(void);
/*! @brief Returns the `EGLContext` of the specified window.
*
* @return The `EGLContext` of the specified window, or `EGL_NO_CONTEXT` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NO_WINDOW_CONTEXT and @ref
* GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI EGLContext glfwGetEGLContext(GLFWwindow* window);
/*! @brief Returns the `EGLSurface` of the specified window.
*
* @return The `EGLSurface` of the specified window, or `EGL_NO_SURFACE` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NO_WINDOW_CONTEXT and @ref
* GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.0.
*
* @ingroup native
*/
GLFWAPI EGLSurface glfwGetEGLSurface(GLFWwindow* window);
#endif
#if defined(GLFW_EXPOSE_NATIVE_OSMESA)
/*! @brief Retrieves the color buffer associated with the specified window.
*
* @param[in] window The window whose color buffer to retrieve.
* @param[out] width Where to store the width of the color buffer, or `NULL`.
* @param[out] height Where to store the height of the color buffer, or `NULL`.
* @param[out] format Where to store the OSMesa pixel format of the color
* buffer, or `NULL`.
* @param[out] buffer Where to store the address of the color buffer, or
* `NULL`.
* @return `GLFW_TRUE` if successful, or `GLFW_FALSE` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NO_WINDOW_CONTEXT and @ref
* GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.3.
*
* @ingroup native
*/
GLFWAPI int glfwGetOSMesaColorBuffer(GLFWwindow* window, int* width, int* height, int* format, void** buffer);
/*! @brief Retrieves the depth buffer associated with the specified window.
*
* @param[in] window The window whose depth buffer to retrieve.
* @param[out] width Where to store the width of the depth buffer, or `NULL`.
* @param[out] height Where to store the height of the depth buffer, or `NULL`.
* @param[out] bytesPerValue Where to store the number of bytes per depth
* buffer element, or `NULL`.
* @param[out] buffer Where to store the address of the depth buffer, or
* `NULL`.
* @return `GLFW_TRUE` if successful, or `GLFW_FALSE` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NO_WINDOW_CONTEXT and @ref
* GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.3.
*
* @ingroup native
*/
GLFWAPI int glfwGetOSMesaDepthBuffer(GLFWwindow* window, int* width, int* height, int* bytesPerValue, void** buffer);
/*! @brief Returns the `OSMesaContext` of the specified window.
*
* @return The `OSMesaContext` of the specified window, or `NULL` if an
* [error](@ref error_handling) occurred.
*
* @errors Possible errors include @ref GLFW_NO_WINDOW_CONTEXT and @ref
* GLFW_NOT_INITIALIZED.
*
* @thread_safety This function may be called from any thread. Access is not
* synchronized.
*
* @since Added in version 3.3.
*
* @ingroup native
*/
GLFWAPI OSMesaContext glfwGetOSMesaContext(GLFWwindow* window);
#endif
#ifdef __cplusplus
}
#endif
#endif /* _glfw3_native_h_ */