Drop GLEW support

CMakeLists.txt

@@ -32,7 +32,6 @@ option(NATIVE_OSX_APP "Support native OSX paths read data from (Default: off)" O
 option(FAST_MATH      "Build with unsafe fast-math compiller option (Default: off)" OFF)
 option(ENABLE_TTF     "Use TrueType fonts instead of TXF (Default: off)" OFF)
 option(ENABLE_TESTS   "Enable unit tests? (Default: off)" OFF)
-option(ENABLE_GLEW    "Use GLEW instead of libepoxy? (Default: on)" ON)
 option(ENABLE_DATA    "Install data from content submodule? (Default: on)" ON)
 
 if(NOT CMAKE_BUILD_TYPE)
@@ -176,16 +175,9 @@ find_package(OpenGL REQUIRED)
 include_directories(${OPENGL_INCLUDE_DIRS})
 link_libraries(${OPENGL_LIBRARIES})
 
-if(ENABLE_GLEW)
-  find_package(GLEW REQUIRED)
-  link_libraries(GLEW::GLEW)
-  include_directories(${GLEW_INCLUDE_DIRS})
-  add_definitions(-DUSE_GLEW)
-else()
-  find_package(Libepoxy REQUIRED)
-  link_libraries(libepoxy::libepoxy)
-  include_directories(${LIBEPOXY_INCLUDE_DIR})
-endif()
+find_package(Libepoxy REQUIRED)
+link_libraries(libepoxy::libepoxy)
+include_directories(${LIBEPOXY_INCLUDE_DIR})
 
 find_package(Eigen3 3.3 NO_MODULE) # -DEigen3_DIR=...
 if(TARGET Eigen3::Eigen)

INSTALL.md

@@ -96,11 +96,11 @@ First you need a C++ compiler able to compile C++11 code (GCC 4.8.1 or later,
 Clang 3.3 or later), CMake, GNU Make or Ninja.
 
 Then you need to have the following devel components installed before Celestia
-will build: OpenGL, glu, glew, theora, libjpeg, and libpng. Optional packages
-are fmtlib, Eigen3, Qt5, Gtk2 and glut.
+will build: OpenGL, glu, libepoxy, theora, libjpeg, and libpng. Optional
+packages are fmtlib, Eigen3, Qt5, Gtk2 and glut.
 
 For example on modern Debian-derived system you need to install the following
-packages: libglew-dev, libjpeg-dev, libpng-dev, libtheora-dev, libgl1-mesa-dev,
+packages: libepoxy-dev, libjpeg-dev, libpng-dev, libtheora-dev, libgl1-mesa-dev,
 libglu1-mesa-dev. Then you may want to install libeigen3-dev, libfmt-dev;
 qtbase5-dev, qtbase5-dev-tools and libqt5opengl5-dev if you want to build with
 Qt5 interface; libgtk2.0-dev and libgtkglext1-dev to build with legacy Gtk2
@@ -159,7 +159,7 @@ and vcpkg (*).
 Install required packages:
 
 ```
-vcpkg install libpng libjpeg-turbo gettext lua fmt glew eigen3
+vcpkg install libpng libjpeg-turbo gettext lua fmt libepoxy eigen3
 ```
 
 Install optional packages:
@@ -220,7 +220,7 @@ pacman -S base-devel
 pacman -S git
 pacman -S mingw-w64-x86_64-cmake
 pacman -S mingw-w64-x86_64-qt5
-pacman -S mingw-w64-x86_64-freeglut mingw-w64-x86_64-glew mingw-w64-x86_64-lua
+pacman -S mingw-w64-x86_64-freeglut mingw-w64-x86_64-libepoxy mingw-w64-x86_64-lua
 pacman -S mingw-w64-x86_64-libtheora mingw-w64-x86_64-mesa
 ```
 
@@ -274,7 +274,7 @@ Install Homebrew
 Install required packages:
 
 ```
-brew install cmake glew fmt gettext libpng lua qt5 jpeg eigen
+brew install cmake fmt gettext libepoxy libpng lua qt5 jpeg eigen
 ```
 
 Install optional packages:

debian/control

@@ -7,7 +7,7 @@ Build-Depends: debhelper (>= 10~),
                libeigen3-dev (>= 3.3~),
                libfmt-dev (>= 4),
                libfreetype6-dev,
-               libglew-dev,
+               libepoxy-dev,
                libglu1-mesa-dev,
                libgtk2.0-dev,
                libgtkglext1-dev,

src/celengine/glsupport.cpp

@@ -15,21 +15,12 @@ namespace
 {
     inline bool has_extension(const char* name) noexcept
     {
-#ifdef USE_GLEW
-        return glewIsSupported(name);
-#else
         return epoxy_has_gl_extension(name);
-#endif
     }
 }
 
 bool init() noexcept
 {
-#ifdef USE_GLEW
-    GLenum glewErr = glewInit();
-    if (glewErr != GLEW_OK)
-        return false;
-#endif
     ARB_shader_texture_lod         = has_extension("GL_ARB_shader_texture_lod");
     ARB_vertex_array_object        = has_extension("GL_ARB_vertex_array_object");
     EXT_framebuffer_object         = has_extension("GL_EXT_framebuffer_object");
@@ -41,17 +32,7 @@ bool init() noexcept
 
 bool checkVersion(int v) noexcept
 {
-#ifdef USE_GLEW
-    switch (v)
-    {
-    case GL_2_1:
-        return GLEW_VERSION_2_1 != GL_FALSE;
-    default:
-        return false;
-    }
-#else
     return epoxy_gl_version() >= v;
-#endif
 }
 } // gl
 } // celestia

src/celengine/glsupport.h

@@ -1,8 +1,5 @@
 #pragma once
 
-#ifdef USE_GLEW
-#include <GL/glew.h>
-#else
 #ifdef _WIN32
 #include <windows.h>
 #endif
@@ -12,7 +9,6 @@
 #else
 #include <GL/glu.h>
 #endif
-#endif
 
 namespace celestia
 {

src/tools/cmod/cmodview/glsupport.cpp

@@ -13,21 +13,12 @@ namespace
 {
     inline bool has_extension(const char* name) noexcept
     {
-#ifdef USE_GLEW
-        return glewIsSupported(name);
-#else
         return epoxy_has_gl_extension(name);
-#endif
     }
 }
 
 bool init() noexcept
 {
-#ifdef USE_GLEW
-    GLenum glewErr = glewInit();
-    if (glewErr != GLEW_OK)
-        return false;
-#endif
     ARB_shader_objects       = has_extension("GL_ARB_shader_objects");
     ARB_shading_language_100 = has_extension("GL_ARB_shading_language_100");
     EXT_framebuffer_object   = has_extension("GL_EXT_framebuffer_object");
@@ -37,17 +28,7 @@ bool init() noexcept
 
 bool checkVersion(int v) noexcept
 {
-#ifdef USE_GLEW
-    switch (v)
-    {
-    case GL_2_1:
-        return GLEW_VERSION_2_1 != GL_FALSE;
-    default:
-        return false;
-    }
-#else
     return epoxy_gl_version() >= v;
-#endif
 }
 } // gl
 } // celestia

src/tools/cmod/cmodview/glsupport.h

@@ -1,8 +1,5 @@
 #pragma once
 
-#ifdef USE_GLEW
-#include <GL/glew.h>
-#else
 #ifdef _WIN32
 #include <windows.h>
 #endif
@@ -12,7 +9,6 @@
 #else
 #include <GL/glu.h>
 #endif
-#endif
 
 namespace celestia
 {