[gtkglarea/jjardon/epoxy: 2/4] Port to libepoxy

[Javier Jardón <jjardon src gnome org>]

commit 3c9dd8d527effc1a8ab7a81de8d95a7b75621402
Author: Javier Jardón <javier jardon codethink co uk>
Date:   Wed Feb 26 13:41:08 2014 +0000

    Port to libepoxy

 configure.ac  |   97 +++-----------------------------------------------------
 gtkgl/gdkgl.c |    4 +-
 2 files changed, 8 insertions(+), 93 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index c60546c..bcda494 100644
--- a/configure.ac
+++ b/configure.ac
@@ -76,98 +76,16 @@ GLIB_REQUIRED_VERSION=2.22
 PKG_CHECK_MODULES(GTK, gtk+-3.0 >= $GTK_REQUIRED_VERSION gmodule-2.0 >= $GLIB_REQUIRED_VERSION)
 
 dnl
-dnl  Check for GL/MesaGL libraries
+dnl  Check for EPOXY library
 dnl
-AC_ARG_WITH(GL-prefix,  [  --with-GL-prefix=DIR    Prefix where GL/MesaGL is installed])
-AC_ARG_WITH(lib-GL,     [  --with-lib-GL           use '-lGL'])
-AC_ARG_WITH(lib-MesaGL, [  --with-lib-MesaGL       use '-lMesaGL'])
-AC_ARG_WITH(lib-opengl32,[ --with-lib-opengl32     use '-lopengl32'])
-
-if test "x$with_GL_prefix" = "x" ; then
- GL_LDOPTS=""
- GL_CFLAGS=""
-else
- GL_LDOPTS="-L$with_GL_prefix/lib"
- GL_CFLAGS="-I$with_GL_prefix/include"
-fi
-
-saved_LIBS="$LIBS"
-
-AC_MSG_CHECKING([OpenGL])
-LIBS="$saved_LIBS $GTK_LIBS $GL_LDOPTS -lGL"
-AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
-                                [[ char glBegin(); glBegin(); ]])],
-               [have_GL=yes],
-               [LIBS="$saved_LIBS $GTK_LIBS $GL_LDOPTS -lopengl32"
-                AC_LINK_IFELSE([AC_LANG_PROGRAM([[ #include <windows.h>
-                                                   #include <GL/gl.h>]],
-                                                [[ glBegin(GL_TRIANGLES); ]])],
-                               [have_opengl32=yes have_GL=yes],[have_GL=no])])
-AC_MSG_RESULT($have_GL)
-
-AC_MSG_CHECKING([Mesa])
-LIBS="$saved_LIBS $GTK_LIBS $GL_LDOPTS -lMesaGL"
-AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
-                                [[ char glBegin(); glBegin(); ]])],
-               [have_MesaGL=yes],[have_MesaGL=no])
-AC_MSG_RESULT($have_MesaGL)
-
-if test "x$have_MesaGL" = "xno"; then
- AC_MSG_CHECKING([Mesa with pthreads])
- LIBS="$saved_LIBS $GTK_LIBS $GL_LDOPTS -lMesaGL -lpthread"
- AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
-                                 [[ char glBegin(); glBegin(); ]])],
-                [have_MesaGL_pthread=yes],[have_MesaGL_pthread=no])
- AC_MSG_RESULT($have_MesaGL_pthread)
-fi
-
-LIBS="$saved_LIBS"
-
-if test "x$with_lib_GL" = "xyes"; then
-
- if test "x$have_GL" = "xyes"; then
-  GL_LIBS="$GL_LDOPTS -lGL"
- else
-  AC_MSG_ERROR([Missing GL library])
- fi
-
-elif test "x$with_lib_MesaGL" = "xyes"; then
-
- if test "x$have_MesaGL" = "xyes"; then
-  GL_LIBS="$GL_LDOPTS -lMesaGL"
- elif test "x$have_MesaGL_pthread" = "xyes"; then
-  GL_LIBS="$GL_LDOPTS -lMesaGL -lpthread"
- else
-  AC_MSG_ERROR([Missing MesaGL library])
- fi
-
-elif test "x$with_lib_opengl32" = "xyes"; then
-
- if test "x$have_opengl32" = "xyes"; then
-  GL_LIBS="$GL_LDOPTS -lopengl32"
- else
-  AC_MSG_ERROR([Missing OpenGL32 library])
- fi
-
-else
-
- if test "x$have_opengl32" = "xyes"; then
-  GL_LIBS="$GL_LDOPTS -lopengl32"
- elif test "x$have_GL" = "xyes"; then
-  GL_LIBS="$GL_LDOPTS -lGL"
- elif test "x$have_MesaGL" = "xyes"; then
-  GL_LIBS="$GL_LDOPTS -lMesaGL"
- elif test "x$have_MesaGL_pthread" = "xyes"; then
-  GL_LIBS="$GL_LDOPTS -lMesaGL -lpthread"
- else
-  AC_MSG_ERROR([You need GL or MesaGL libraries])
- fi
-
-fi
+EPOXY_REQUIRED_VERSION=1.0
+PKG_CHECK_MODULES([GL],[
+       epoxy >= $EPOXY_REQUIRED_VERSION
+])
 
 saved_LIBS="$LIBS"
 AC_MSG_CHECKING([OpenGL shaders])
-LIBS="$saved_LIBS $GTK_LIBS $GL_LDOPTS $GL_LIBS"
+LIBS="$saved_LIBS $GL_LIBS"
 AC_LINK_IFELSE([AC_LANG_PROGRAM([[]],
                                 [[ char glCreateProgram(); glCreateProgram(); ]])],
                [have_shaders=yes],[have_shaders=no])
@@ -175,8 +93,6 @@ AC_MSG_RESULT($have_shaders)
 LIBS="$saved_LIBS"
 AM_CONDITIONAL(HAVE_SHADERS, test "$have_shaders" = "yes")
 
-AC_SUBST(GL_CFLAGS)
-AC_SUBST(GL_LIBS)
 
 AC_CONFIG_FILES([
   Makefile
@@ -195,6 +111,5 @@ echo "Configuration summary"
 echo ""
 echo "   * Installation prefix: $prefix"
 echo "   * Win32:               $native_win32"
-echo "   * OpenGL:              $have_GL"
 echo ""
 echo "---"
diff --git a/gtkgl/gdkgl.c b/gtkgl/gdkgl.c
index c1765e8..36d5a19 100644
--- a/gtkgl/gdkgl.c
+++ b/gtkgl/gdkgl.c
@@ -23,13 +23,13 @@
 
 #include "gdkgl.h"
 
-#include <GL/gl.h>
+#include <epoxy/gl.h>
 #if defined GDK_WINDOWING_WIN32
 #   include <gdk/gdkwin32.h>
 #   define PLATFORM "GDK_WINDOWING_WIN32"
 #elif defined GDK_WINDOWING_X11
 #   include <gdk/gdkx.h>
-#   include <GL/glx.h>
+#   include <epoxy/glx.h>
 #   define PLATFORM "GDK_WINDOWING_X11"
 #elif defined GDK_WINDOWING_FB
 #   define PLATFORM "GDK_WINDOWING_FB"