Merge branch 'tpetazzoni-make-egl-optional'

Allow optionally disabling EGL support, just like we allow disabling GLX
support.

Closes anholt#123

.travis.yml

@@ -29,3 +29,4 @@ before_script:
 script:
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then docker run withgit /bin/sh -c "cd /root && CC=$CC ./epoxy-run-tests.sh" ; fi
   - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then docker run withgit /bin/sh -c "cd /root && CC=$CC ./epoxy-run-tests.sh -Denable-glx=no" ; fi
+  - if [[ "$TRAVIS_OS_NAME" == "linux" ]]; then docker run withgit /bin/sh -c "cd /root && CC=$CC ./epoxy-run-tests.sh -Denable-egl=no" ; fi

configure.ac

@@ -88,11 +88,34 @@ AS_CASE([$enable_glx],
   [AC_MSG_ERROR([Invalid value "$enable_glx" for option "--enable-glx"])]
 ])
 
-# The remaining platform specific API for GL/GLES are enabled
-# depending on the platform we're building for
+AC_ARG_ENABLE([egl],
+              [AC_HELP_STRING([--enable-egl=@<:@auto,yes,no@:>@], [Enable EGL support @<:@default=auto@:>@])],
+              [enable_egl=$enableval],
+              [enable_egl=auto])
+
+AS_CASE([$enable_egl],
+  [auto], [
+    AS_CASE([$host_os],
+            [mingw*], [build_egl=no],
+            [darwin*], [build_egl=no],
+            [build_egl=yes])
+  ],
+
+  [yes], [
+    build_egl=yes
+  ],
+
+  [no], [
+    build_egl=no
+  ],
+
+  [AC_MSG_ERROR([Invalid value "$enable_egl" for option "--enable-egl"])]
+])
+
+# The remaining platform specific API are enabled depending on the
+# platform we're building for
 AS_CASE([$host_os],
   [mingw*], [
-    build_egl=no
     build_wgl=yes
     has_znow=yes
     # On windows, the DLL has to have all of its functions
@@ -108,15 +131,13 @@ AS_CASE([$host_os],
   ],
 
   [darwin*], [
-    build_egl=no
     build_wgl=no
     build_apple=yes
     has_znow=no
     EPOXY_LINK_LIBS=""
   ],
 
   [
-    build_egl=yes
     build_wgl=no
     has_znow=yes
     # On platforms with dlopen, we load everything dynamically and
@@ -131,6 +152,7 @@ AM_CONDITIONAL(BUILD_EGL, test x$build_egl = xyes)
 if test x$build_egl = xyes; then
     PKG_CHECK_MODULES(EGL, [egl])
     AC_DEFINE([BUILD_EGL], [1], [build EGL tests])
+    AC_DEFINE(ENABLE_EGL, [1], [Whether EGL support is enabled])
 fi
 
 AM_CONDITIONAL(BUILD_GLX, test x$build_glx = xyes)

meson.build

@@ -53,26 +53,41 @@ elif enable_glx == 'no'
   build_glx = false
 endif
 
+enable_egl = get_option('enable-egl')
+if enable_egl == 'auto'
+  if host_system == 'windows'
+    build_egl = false
+  elif host_system == 'darwin'
+    build_egl = false
+  elif host_system == 'android'
+    build_egl = true
+  else
+    build_egl = true
+  endif
+elif enable_egl == 'yes'
+  build_egl = true
+elif enable_egl == 'no'
+  build_egl = false
+endif
+
 # The remaining platform specific API for GL/GLES are enabled
 # depending on the platform we're building for
 if host_system == 'windows'
-  build_egl = false
   build_apple = false
   build_wgl = true
   has_znow = true
 elif host_system == 'darwin'
-  build_egl = false
   build_apple = true
   build_wgl = false
   has_znow = false
 else
-  build_egl = true
   build_apple = false
   build_wgl = false
   has_znow = true
 endif
 
 conf.set10('ENABLE_GLX', build_glx)
+conf.set10('ENABLE_EGL', build_egl)
 
 # Compiler flags, taken from the Xorg macros
 if cc.get_id() == 'msvc'

meson_options.txt

@@ -6,3 +6,8 @@ option('enable-glx',
        choices: [ 'auto', 'yes', 'no' ],
        value: 'auto',
        description: 'Enable GLX support')
+option('enable-egl',
+       type: 'combo',
+       choices: [ 'auto', 'yes', 'no' ],
+       value: 'auto',
+       description: 'Enable EGL support')

src/dispatch_common.h

@@ -24,19 +24,19 @@
 #include "config.h"
 
 #ifdef _WIN32
-#define PLATFORM_HAS_EGL 0
+#define PLATFORM_HAS_EGL ENABLE_EGL
 #define PLATFORM_HAS_GLX ENABLE_GLX
 #define PLATFORM_HAS_WGL 1
 #elif defined(__APPLE__)
-#define PLATFORM_HAS_EGL 0
+#define PLATFORM_HAS_EGL ENABLE_EGL
 #define PLATFORM_HAS_GLX ENABLE_GLX
 #define PLATFORM_HAS_WGL 0
 #elif defined(ANDROID)
-#define PLATFORM_HAS_EGL 1
+#define PLATFORM_HAS_EGL ENABLE_EGL
 #define PLATFORM_HAS_GLX 0
 #define PLATFORM_HAS_WGL 0
 #else
-#define PLATFORM_HAS_EGL 1
+#define PLATFORM_HAS_EGL ENABLE_EGL
 #define PLATFORM_HAS_GLX ENABLE_GLX
 #define PLATFORM_HAS_WGL 0
 #endif