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author | Kyle Edwards <kyle.edwards@kitware.com> | 2018-10-10 14:55:40 (GMT) |
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committer | Kyle Edwards <kyle.edwards@kitware.com> | 2018-10-10 14:56:00 (GMT) |
commit | f9f96598df3164cf12b6da7764bc74361e3fa414 (patch) | |
tree | a70b2554a45c55692673cd80acdc5e8a3c1ff4f5 /Modules/FindOpenGL.cmake | |
parent | 3499c91a1bf5eadb62c099eaefdf6a9a2f8f90a4 (diff) | |
download | CMake-f9f96598df3164cf12b6da7764bc74361e3fa414.zip CMake-f9f96598df3164cf12b6da7764bc74361e3fa414.tar.gz CMake-f9f96598df3164cf12b6da7764bc74361e3fa414.tar.bz2 |
Help: Convert FindOpenGL documentation to block comment
Diffstat (limited to 'Modules/FindOpenGL.cmake')
-rw-r--r-- | Modules/FindOpenGL.cmake | 239 |
1 files changed, 120 insertions, 119 deletions
diff --git a/Modules/FindOpenGL.cmake b/Modules/FindOpenGL.cmake index 4d0786c..16c794b 100644 --- a/Modules/FindOpenGL.cmake +++ b/Modules/FindOpenGL.cmake @@ -1,125 +1,126 @@ # Distributed under the OSI-approved BSD 3-Clause License. See accompanying # file Copyright.txt or https://cmake.org/licensing for details. -#.rst: -# FindOpenGL -# ---------- -# -# FindModule for OpenGL and GLU. -# -# Optional COMPONENTS -# ^^^^^^^^^^^^^^^^^^^ -# -# This module respects several optional COMPONENTS: ``EGL``, ``GLX``, and -# ``OpenGL``. There are corresponding import targets for each of these flags. -# -# IMPORTED Targets -# ^^^^^^^^^^^^^^^^ -# -# This module defines the :prop_tgt:`IMPORTED` targets: -# -# ``OpenGL::GL`` -# Defined to the platform-specific OpenGL libraries if the system has OpenGL. -# ``OpenGL::OpenGL`` -# Defined to libOpenGL if the system is GLVND-based. -# ``OpenGL::GLU`` -# Defined if the system has GLU. -# ``OpenGL::GLX`` -# Defined if the system has GLX. -# ``OpenGL::EGL`` -# Defined if the system has EGL. -# -# Result Variables -# ^^^^^^^^^^^^^^^^ -# -# This module sets the following variables: -# -# ``OPENGL_FOUND`` -# True, if the system has OpenGL and all components are found. -# ``OPENGL_XMESA_FOUND`` -# True, if the system has XMESA. -# ``OPENGL_GLU_FOUND`` -# True, if the system has GLU. -# ``OpenGL_OpenGL_FOUND`` -# True, if the system has an OpenGL library. -# ``OpenGL_GLX_FOUND`` -# True, if the system has GLX. -# ``OpenGL_EGL_FOUND`` -# True, if the system has EGL. -# ``OPENGL_INCLUDE_DIR`` -# Path to the OpenGL include directory. -# ``OPENGL_EGL_INCLUDE_DIRS`` -# Path to the EGL include directory. -# ``OPENGL_LIBRARIES`` -# Paths to the OpenGL library, windowing system libraries, and GLU libraries. -# On Linux, this assumes GLX and is never correct for EGL-based targets. -# Clients are encouraged to use the ``OpenGL::*`` import targets instead. -# -# Cache variables -# ^^^^^^^^^^^^^^^ -# -# The following cache variables may also be set: -# -# ``OPENGL_egl_LIBRARY`` -# Path to the EGL library. -# ``OPENGL_glu_LIBRARY`` -# Path to the GLU library. -# ``OPENGL_glx_LIBRARY`` -# Path to the GLVND 'GLX' library. -# ``OPENGL_opengl_LIBRARY`` -# Path to the GLVND 'OpenGL' library -# ``OPENGL_gl_LIBRARY`` -# Path to the OpenGL library. New code should prefer the ``OpenGL::*`` import -# targets. -# -# Linux-specific -# ^^^^^^^^^^^^^^ -# -# Some Linux systems utilize GLVND as a new ABI for OpenGL. GLVND separates -# context libraries from OpenGL itself; OpenGL lives in "libOpenGL", and -# contexts are defined in "libGLX" or "libEGL". GLVND is currently the only way -# to get OpenGL 3+ functionality via EGL in a manner portable across vendors. -# Projects may use GLVND explicitly with target ``OpenGL::OpenGL`` and either -# ``OpenGL::GLX`` or ``OpenGL::EGL``. -# -# Projects may use the ``OpenGL::GL`` target (or ``OPENGL_LIBRARIES`` variable) -# to use legacy GL interfaces. These will use the legacy GL library located -# by ``OPENGL_gl_LIBRARY``, if available. If ``OPENGL_gl_LIBRARY`` is empty or -# not found and GLVND is available, the ``OpenGL::GL`` target will use GLVND -# ``OpenGL::OpenGL`` and ``OpenGL::GLX`` (and the ``OPENGL_LIBRARIES`` -# variable will use the corresponding libraries). Thus, for non-EGL-based -# Linux targets, the ``OpenGL::GL`` target is most portable. -# -# A ``OpenGL_GL_PREFERENCE`` variable may be set to specify the preferred way -# to provide legacy GL interfaces in case multiple choices are available. -# The value may be one of: -# -# ``GLVND`` -# If the GLVND OpenGL and GLX libraries are available, prefer them. -# This forces ``OPENGL_gl_LIBRARY`` to be empty. -# This is the default if components were requested (since components -# correspond to GLVND libraries) or if policy :policy:`CMP0072` is -# set to ``NEW``. -# -# ``LEGACY`` -# Prefer to use the legacy libGL library, if available. -# This is the default if no components were requested and -# policy :policy:`CMP0072` is not set to ``NEW``. -# -# For EGL targets the client must rely on GLVND support on the user's system. -# Linking should use the ``OpenGL::OpenGL OpenGL::EGL`` targets. Using GLES* -# libraries is theoretically possible in place of ``OpenGL::OpenGL``, but this -# module does not currently support that; contributions welcome. -# -# ``OPENGL_egl_LIBRARY`` and ``OPENGL_EGL_INCLUDE_DIRS`` are defined in the case of -# GLVND. For non-GLVND Linux and other systems these are left undefined. -# -# macOS-Specific -# ^^^^^^^^^^^^^^ -# -# On OSX FindOpenGL defaults to using the framework version of OpenGL. People -# will have to change the cache values of OPENGL_glu_LIBRARY and -# OPENGL_gl_LIBRARY to use OpenGL with X11 on OSX. +#[=======================================================================[.rst: +FindOpenGL +---------- + +FindModule for OpenGL and GLU. + +Optional COMPONENTS +^^^^^^^^^^^^^^^^^^^ + +This module respects several optional COMPONENTS: ``EGL``, ``GLX``, and +``OpenGL``. There are corresponding import targets for each of these flags. + +IMPORTED Targets +^^^^^^^^^^^^^^^^ + +This module defines the :prop_tgt:`IMPORTED` targets: + +``OpenGL::GL`` + Defined to the platform-specific OpenGL libraries if the system has OpenGL. +``OpenGL::OpenGL`` + Defined to libOpenGL if the system is GLVND-based. +``OpenGL::GLU`` + Defined if the system has GLU. +``OpenGL::GLX`` + Defined if the system has GLX. +``OpenGL::EGL`` + Defined if the system has EGL. + +Result Variables +^^^^^^^^^^^^^^^^ + +This module sets the following variables: + +``OPENGL_FOUND`` + True, if the system has OpenGL and all components are found. +``OPENGL_XMESA_FOUND`` + True, if the system has XMESA. +``OPENGL_GLU_FOUND`` + True, if the system has GLU. +``OpenGL_OpenGL_FOUND`` + True, if the system has an OpenGL library. +``OpenGL_GLX_FOUND`` + True, if the system has GLX. +``OpenGL_EGL_FOUND`` + True, if the system has EGL. +``OPENGL_INCLUDE_DIR`` + Path to the OpenGL include directory. +``OPENGL_EGL_INCLUDE_DIRS`` + Path to the EGL include directory. +``OPENGL_LIBRARIES`` + Paths to the OpenGL library, windowing system libraries, and GLU libraries. + On Linux, this assumes GLX and is never correct for EGL-based targets. + Clients are encouraged to use the ``OpenGL::*`` import targets instead. + +Cache variables +^^^^^^^^^^^^^^^ + +The following cache variables may also be set: + +``OPENGL_egl_LIBRARY`` + Path to the EGL library. +``OPENGL_glu_LIBRARY`` + Path to the GLU library. +``OPENGL_glx_LIBRARY`` + Path to the GLVND 'GLX' library. +``OPENGL_opengl_LIBRARY`` + Path to the GLVND 'OpenGL' library +``OPENGL_gl_LIBRARY`` + Path to the OpenGL library. New code should prefer the ``OpenGL::*`` import + targets. + +Linux-specific +^^^^^^^^^^^^^^ + +Some Linux systems utilize GLVND as a new ABI for OpenGL. GLVND separates +context libraries from OpenGL itself; OpenGL lives in "libOpenGL", and +contexts are defined in "libGLX" or "libEGL". GLVND is currently the only way +to get OpenGL 3+ functionality via EGL in a manner portable across vendors. +Projects may use GLVND explicitly with target ``OpenGL::OpenGL`` and either +``OpenGL::GLX`` or ``OpenGL::EGL``. + +Projects may use the ``OpenGL::GL`` target (or ``OPENGL_LIBRARIES`` variable) +to use legacy GL interfaces. These will use the legacy GL library located +by ``OPENGL_gl_LIBRARY``, if available. If ``OPENGL_gl_LIBRARY`` is empty or +not found and GLVND is available, the ``OpenGL::GL`` target will use GLVND +``OpenGL::OpenGL`` and ``OpenGL::GLX`` (and the ``OPENGL_LIBRARIES`` +variable will use the corresponding libraries). Thus, for non-EGL-based +Linux targets, the ``OpenGL::GL`` target is most portable. + +A ``OpenGL_GL_PREFERENCE`` variable may be set to specify the preferred way +to provide legacy GL interfaces in case multiple choices are available. +The value may be one of: + +``GLVND`` + If the GLVND OpenGL and GLX libraries are available, prefer them. + This forces ``OPENGL_gl_LIBRARY`` to be empty. + This is the default if components were requested (since components + correspond to GLVND libraries) or if policy :policy:`CMP0072` is + set to ``NEW``. + +``LEGACY`` + Prefer to use the legacy libGL library, if available. + This is the default if no components were requested and + policy :policy:`CMP0072` is not set to ``NEW``. + +For EGL targets the client must rely on GLVND support on the user's system. +Linking should use the ``OpenGL::OpenGL OpenGL::EGL`` targets. Using GLES* +libraries is theoretically possible in place of ``OpenGL::OpenGL``, but this +module does not currently support that; contributions welcome. + +``OPENGL_egl_LIBRARY`` and ``OPENGL_EGL_INCLUDE_DIRS`` are defined in the case of +GLVND. For non-GLVND Linux and other systems these are left undefined. + +macOS-Specific +^^^^^^^^^^^^^^ + +On OSX FindOpenGL defaults to using the framework version of OpenGL. People +will have to change the cache values of OPENGL_glu_LIBRARY and +OPENGL_gl_LIBRARY to use OpenGL with X11 on OSX. +#]=======================================================================] set(_OpenGL_REQUIRED_VARS OPENGL_gl_LIBRARY) |