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308 lines
16 KiB
Markdown
308 lines
16 KiB
Markdown
# GLFW
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[](https://github.com/glfw/glfw/actions)
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[](https://ci.appveyor.com/project/elmindreda/glfw)
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[](https://scan.coverity.com/projects/glfw-glfw)
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## Introduction
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GLFW is an Open Source, multi-platform library for OpenGL, OpenGL ES and Vulkan
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application development. It provides a simple, platform-independent API for
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creating windows, contexts and surfaces, reading input, handling events, etc.
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GLFW natively supports Windows, macOS and Linux and other Unix-like systems. On
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Linux both X11 and Wayland are supported.
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GLFW is licensed under the [zlib/libpng
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license](https://www.glfw.org/license.html).
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You can [download](https://www.glfw.org/download.html) the latest stable release
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as source or Windows binaries, or fetch the `latest` branch from GitHub. Each
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release starting with 3.0 also has a corresponding [annotated
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tag](https://github.com/glfw/glfw/releases) with source and binary archives.
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The [documentation](https://www.glfw.org/docs/latest/) is available online and is
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included in all source and binary archives. See the [release
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notes](https://www.glfw.org/docs/latest/news.html) for new features, caveats and
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deprecations in the latest release. For more details see the [version
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history](https://www.glfw.org/changelog.html).
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The `master` branch is the stable integration branch and _should_ always compile
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and run on all supported platforms, although details of newly added features may
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change until they have been included in a release. New features and many bug
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fixes live in [other branches](https://github.com/glfw/glfw/branches/all) until
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they are stable enough to merge.
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If you are new to GLFW, you may find the
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[tutorial](https://www.glfw.org/docs/latest/quick.html) for GLFW 3 useful. If
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you have used GLFW 2 in the past, there is a [transition
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guide](https://www.glfw.org/docs/latest/moving.html) for moving to the GLFW
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3 API.
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GLFW exists because of the contributions of [many people](CONTRIBUTORS.md)
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around the world, whether by reporting bugs, providing community support, adding
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features, reviewing or testing code, debugging, proofreading docs, suggesting
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features or fixing bugs.
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## Compiling GLFW
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GLFW itself requires only the headers and libraries for your OS and window
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system. It does not need the headers for any context creation API (WGL, GLX,
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EGL, NSGL, OSMesa) or rendering API (OpenGL, OpenGL ES, Vulkan) to enable
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support for them.
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GLFW supports compilation on Windows with Visual C++ 2010 and later, MinGW and
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MinGW-w64, on macOS with Clang and on Linux and other Unix-like systems with GCC
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and Clang. It will likely compile in other environments as well, but this is
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not regularly tested.
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There are [pre-compiled Windows binaries](https://www.glfw.org/download.html)
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available for all supported compilers.
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See the [compilation guide](https://www.glfw.org/docs/latest/compile.html) for
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more information about how to compile GLFW yourself.
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## Using GLFW
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See the [documentation](https://www.glfw.org/docs/latest/) for tutorials, guides
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and the API reference.
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## Contributing to GLFW
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See the [contribution
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guide](https://github.com/glfw/glfw/blob/master/docs/CONTRIBUTING.md) for
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more information.
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## System requirements
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GLFW supports Windows XP and later and macOS 10.8 and later. Linux and other
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Unix-like systems running the X Window System are supported even without
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a desktop environment or modern extensions, although some features require
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a running window or clipboard manager. The OSMesa backend requires Mesa 6.3.
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See the [compatibility guide](https://www.glfw.org/docs/latest/compat.html)
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in the documentation for more information.
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## Dependencies
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GLFW itself needs only CMake 3.1 or later and the headers and libraries for your
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OS and window system.
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The examples and test programs depend on a number of tiny libraries. These are
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located in the `deps/` directory.
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- [getopt\_port](https://github.com/kimgr/getopt_port/) for examples
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with command-line options
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- [TinyCThread](https://github.com/tinycthread/tinycthread) for threaded
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examples
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- [glad2](https://github.com/Dav1dde/glad) for loading OpenGL and Vulkan
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functions
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- [linmath.h](https://github.com/datenwolf/linmath.h) for linear algebra in
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examples
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- [Nuklear](https://github.com/Immediate-Mode-UI/Nuklear) for test and example UI
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- [stb\_image\_write](https://github.com/nothings/stb) for writing images to disk
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The documentation is generated with [Doxygen](https://doxygen.org/) if CMake can
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find that tool.
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## Reporting bugs
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Bugs are reported to our [issue tracker](https://github.com/glfw/glfw/issues).
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Please check the [contribution
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guide](https://github.com/glfw/glfw/blob/master/docs/CONTRIBUTING.md) for
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information on what to include when reporting a bug.
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## Changelog
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- Added `GLFW_PLATFORM` init hint for runtime platform selection (#1958)
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- Added `GLFW_ANY_PLATFORM`, `GLFW_PLATFORM_WIN32`, `GLFW_PLATFORM_COCOA`,
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`GLFW_PLATFORM_WAYLAND`, `GLFW_PLATFORM_X11` and `GLFW_PLATFORM_NULL` symbols to
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specify the desired platform (#1958)
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- Added `glfwGetPlatform` function to query what platform was selected (#1655,#1958)
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- Added `glfwPlatformSupported` function to query if a platform is supported
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(#1655,#1958)
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- Added `glfwInitAllocator` for setting a custom memory allocator (#544,#1628,#1947)
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- Added `GLFWallocator` struct and `GLFWallocatefun`, `GLFWreallocatefun` and
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`GLFWdeallocatefun` types (#544,#1628,#1947)
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- Added `glfwInitVulkanLoader` for using a non-default Vulkan loader (#1374,#1890)
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- Added `GLFW_RESIZE_NWSE_CURSOR`, `GLFW_RESIZE_NESW_CURSOR`,
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`GLFW_RESIZE_ALL_CURSOR` and `GLFW_NOT_ALLOWED_CURSOR` cursor shapes (#427)
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- Added `GLFW_RESIZE_EW_CURSOR` alias for `GLFW_HRESIZE_CURSOR` (#427)
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- Added `GLFW_RESIZE_NS_CURSOR` alias for `GLFW_VRESIZE_CURSOR` (#427)
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- Added `GLFW_POINTING_HAND_CURSOR` alias for `GLFW_HAND_CURSOR` (#427)
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- Added `GLFW_MOUSE_PASSTHROUGH` window hint for letting mouse input pass
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through the window (#1236,#1568)
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- Added `GLFW_PLATFORM_UNAVAILABLE` error for platform detection failures (#1958)
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- Added `GLFW_FEATURE_UNAVAILABLE` error for platform limitations (#1692)
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- Added `GLFW_FEATURE_UNIMPLEMENTED` error for incomplete backends (#1692)
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- Added `GLFW_ANGLE_PLATFORM_TYPE` init hint and `GLFW_ANGLE_PLATFORM_TYPE_*`
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values to select ANGLE backend (#1380)
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- Added `GLFW_X11_XCB_VULKAN_SURFACE` init hint for selecting X11 Vulkan
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surface extension (#1793)
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- Added `GLFW_BUILD_WIN32` CMake option for enabling Win32 support (#1958)
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- Added `GLFW_BUILD_COCOA` CMake option for enabling Cocoa support (#1958)
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- Added `GLFW_BUILD_X11` CMake option for enabling X11 support (#1958)
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- Added `GLFW_LIBRARY_TYPE` CMake variable for overriding the library type
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(#279,#1307,#1497,#1574,#1928)
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- Added `GLFW_PKG_CONFIG_REQUIRES_PRIVATE` and `GLFW_PKG_CONFIG_LIBS_PRIVATE` CMake
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variables exposing pkg-config dependencies (#1307)
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- Made joystick subsystem initialize at first use (#1284,#1646)
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- Made `GLFW_DOUBLEBUFFER` a read-only window attribute
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- Updated the minimum required CMake version to 3.1
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- Updated gamepad mappings from upstream
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- Disabled tests and examples by default when built as a CMake subdirectory
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- Renamed `GLFW_USE_WAYLAND` CMake option to `GLFW_BUILD_WAYLAND` (#1958)
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- Removed `GLFW_USE_OSMESA` CMake option enabling the Null platform (#1958)
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- Removed CMake generated configuration header
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- Bugfix: The CMake config-file package used an absolute path and was not
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relocatable (#1470)
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- Bugfix: Video modes with a duplicate screen area were discarded (#1555,#1556)
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- Bugfix: Compiling with -Wextra-semi caused warnings (#1440)
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- Bugfix: Built-in mappings failed because some OEMs re-used VID/PID (#1583)
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- Bugfix: Some extension loader headers did not prevent default OpenGL header
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inclusion (#1695)
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- Bugfix: Buffers were swapped at creation on single-buffered windows (#1873)
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- Bugfix: Gamepad mapping updates could spam `GLFW_INVALID_VALUE` due to
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incompatible controllers sharing hardware ID (#1763)
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- Bugfix: Native access functions for context handles did not check that the API matched
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- [Win32] Added the `GLFW_WIN32_KEYBOARD_MENU` window hint for enabling access
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to the window menu
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- [Win32] Added a version info resource to the GLFW DLL
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- [Win32] Disabled framebuffer transparency on Windows 7 when DWM windows are
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opaque (#1512)
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- [Win32] Bugfix: `GLFW_INCLUDE_VULKAN` plus `VK_USE_PLATFORM_WIN32_KHR` caused
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symbol redefinition (#1524)
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- [Win32] Bugfix: The cursor position event was emitted before its cursor enter
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event (#1490)
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- [Win32] Bugfix: The window hint `GLFW_MAXIMIZED` did not move or resize the
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window (#1499)
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- [Win32] Bugfix: Disabled cursor mode interfered with some non-client actions
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- [Win32] Bugfix: Super key was not released after Win+V hotkey (#1622)
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- [Win32] Bugfix: `glfwGetKeyName` could access out of bounds and return an
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invalid pointer
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- [Win32] Bugfix: Some synthetic key events were reported as `GLFW_KEY_UNKNOWN`
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(#1623)
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- [Win32] Bugfix: Non-BMP Unicode codepoint input was reported as UTF-16
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- [Win32] Bugfix: Monitor functions could return invalid values after
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configuration change (#1761)
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- [Win32] Bugfix: Initialization would segfault on Windows 8 (not 8.1) (#1775)
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- [Win32] Bugfix: Duplicate size events were not filtered (#1610)
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- [Win32] Bugfix: Full screen windows were incorrectly resized by DPI changes
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(#1582)
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- [Win32] Bugfix: `GLFW_SCALE_TO_MONITOR` had no effect on systems older than
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Windows 10 version 1703 (#1511)
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- [Win32] Bugfix: `USE_MSVC_RUNTIME_LIBRARY_DLL` had no effect on CMake 3.15 or
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later (#1783,#1796)
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- [Win32] Bugfix: Compilation with LLVM for Windows failed (#1807,#1824,#1874)
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- [Win32] Bugfix: The foreground lock timeout was overridden, ignoring the user
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- [Cocoa] Added support for `VK_EXT_metal_surface` (#1619)
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- [Cocoa] Added locating the Vulkan loader at runtime in an application bundle
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- [Cocoa] Moved main menu creation to GLFW initialization time (#1649)
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- [Cocoa] Changed `EGLNativeWindowType` from `NSView` to `CALayer` (#1169)
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- [Cocoa] Changed F13 key to report Print Screen for cross-platform consistency
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(#1786)
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- [Cocoa] Removed dependency on the CoreVideo framework
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- [Cocoa] Bugfix: `glfwSetWindowSize` used a bottom-left anchor point (#1553)
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- [Cocoa] Bugfix: Window remained on screen after destruction until event poll
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(#1412)
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- [Cocoa] Bugfix: Event processing before window creation would assert (#1543)
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- [Cocoa] Bugfix: Undecorated windows could not be iconified on recent macOS
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- [Cocoa] Bugfix: Touching event queue from secondary thread before main thread
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would abort (#1649)
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- [Cocoa] Bugfix: Non-BMP Unicode codepoint input was reported as UTF-16
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(#1635)
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- [Cocoa] Bugfix: Failing to retrieve the refresh rate of built-in displays
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could leak memory
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- [Cocoa] Bugfix: Objective-C files were compiled as C with CMake 3.19 (#1787)
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- [Cocoa] Bugfix: Duplicate video modes were not filtered out (#1830)
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- [Cocoa] Bugfix: Menu bar was not clickable on macOS 10.15+ until it lost and
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regained focus (#1648,#1802)
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- [Cocoa] Bugfix: Monitor name query could segfault on macOS 11 (#1809,#1833)
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- [Cocoa] Bugfix: The install name of the installed dylib was relative (#1504)
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- [Cocoa] Bugfix: The MoltenVK layer contents scale was updated only after
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related events were emitted
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- [Cocoa] Bugfix: Moving the cursor programmatically would freeze it for
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a fraction of a second (#1962)
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- [Cocoa] Bugfix: `kIOMasterPortDefault` was deprecated in macOS 12.0 (#1980)
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- [X11] Bugfix: The CMake files did not check for the XInput headers (#1480)
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- [X11] Bugfix: Key names were not updated when the keyboard layout changed
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(#1462,#1528)
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- [X11] Bugfix: Decorations could not be enabled after window creation (#1566)
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- [X11] Bugfix: Content scale fallback value could be inconsistent (#1578)
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- [X11] Bugfix: `glfwMaximizeWindow` had no effect on hidden windows
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- [X11] Bugfix: Clearing `GLFW_FLOATING` on a hidden window caused invalid read
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- [X11] Bugfix: Changing `GLFW_FLOATING` on a hidden window could silently fail
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- [X11] Bugfix: Disabled cursor mode was interrupted by indicator windows
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- [X11] Bugfix: Monitor physical dimensions could be reported as zero mm
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- [X11] Bugfix: Window position events were not emitted during resizing (#1613)
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- [X11] Bugfix: `glfwFocusWindow` could terminate on older WMs or without a WM
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- [X11] Bugfix: Querying a disconnected monitor could segfault (#1602)
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- [X11] Bugfix: IME input of CJK was broken for "C" locale (#1587,#1636)
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- [X11] Bugfix: Termination would segfault if the IM had been destroyed
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- [X11] Bugfix: Any IM started after initialization would not be detected
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- [X11] Bugfix: Xlib errors caused by other parts of the application could be
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reported as GLFW errors
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- [X11] Bugfix: A handle race condition could cause a `BadWindow` error (#1633)
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- [X11] Bugfix: XKB path used keysyms instead of physical locations for
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non-printable keys (#1598)
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- [X11] Bugfix: Function keys were mapped to `GLFW_KEY_UNKNOWN` for some layout
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combinations (#1598)
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- [X11] Bugfix: Keys pressed simultaneously with others were not always
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reported (#1112,#1415,#1472,#1616)
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- [X11] Bugfix: Some window attributes were not applied on leaving fullscreen
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(#1863)
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- [X11] Bugfix: Changing `GLFW_FLOATING` could leak memory
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- [Wayland] Added dynamic loading of all Wayland libraries
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- [Wayland] Removed support for `wl_shell` (#1443)
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- [Wayland] Bugfix: The `GLFW_HAND_CURSOR` shape used the wrong image (#1432)
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- [Wayland] Bugfix: `CLOCK_MONOTONIC` was not correctly enabled
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- [Wayland] Bugfix: Repeated keys could be reported with `NULL` window (#1704)
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- [Wayland] Bugfix: Retrieving partial framebuffer size would segfault
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- [Wayland] Bugfix: Scrolling offsets were inverted compared to other platforms
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(#1463)
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- [Wayland] Bugfix: Client-Side Decorations were destroyed in the wrong order
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(#1798)
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- [Wayland] Bugfix: Monitors physical size could report zero (#1784,#1792)
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- [Wayland] Bugfix: Some keys were not repeating in Wayland (#1908)
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- [Wayland] Bugfix: Non-arrow cursors are offset from the hotspot (#1706,#1899)
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- [Wayland] Bugfix: The `O_CLOEXEC` flag was not defined on FreeBSD
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- [POSIX] Removed use of deprecated function `gettimeofday`
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- [POSIX] Bugfix: `CLOCK_MONOTONIC` was not correctly tested for or enabled
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- [WGL] Disabled the DWM swap interval hack for Windows 8 and later (#1072)
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- [NSGL] Removed enforcement of forward-compatible flag for core contexts
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- [NSGL] Bugfix: `GLFW_COCOA_RETINA_FRAMEBUFFER` had no effect on newer
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macOS versions (#1442)
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- [NSGL] Bugfix: Workaround for swap interval on 10.14 broke on 10.12 (#1483)
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- [NSGL] Bugfix: Defining `GL_SILENCE_DEPRECATION` externally caused
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a duplicate definition warning (#1840)
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- [EGL] Added platform selection via the `EGL_EXT_platform_base` extension
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(#442)
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- [EGL] Added ANGLE backend selection via `EGL_ANGLE_platform_angle` extension
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(#1380)
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- [EGL] Bugfix: The `GLFW_DOUBLEBUFFER` context attribute was ignored (#1843)
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## Contact
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On [glfw.org](https://www.glfw.org/) you can find the latest version of GLFW, as
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well as news, documentation and other information about the project.
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If you have questions related to the use of GLFW, we have a
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[forum](https://discourse.glfw.org/), and the `#glfw` IRC channel on
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[Libera.Chat](https://libera.chat/).
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If you have a bug to report, a patch to submit or a feature you'd like to
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request, please file it in the
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[issue tracker](https://github.com/glfw/glfw/issues) on GitHub.
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Finally, if you're interested in helping out with the development of GLFW or
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porting it to your favorite platform, join us on the forum, GitHub or IRC.
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