Adds testgles2

Source code copied from: https://github.com/fantasydr/sdl-2.0-gles (thanks!)

Minor fixes, configure script changes done by me.

android-project/jni/src/Android.mk

@@ -14,6 +14,6 @@ LOCAL_SRC_FILES := $(SDL_PATH)/src/main/android/SDL_android_main.c \
 
 LOCAL_SHARED_LIBRARIES := SDL2
 
-LOCAL_LDLIBS := -lGLESv1_CM -llog
+LOCAL_LDLIBS := -lGLESv1_CM -lGLESv2 -llog
 
 include $(BUILD_SHARED_LIBRARY)

test/Makefile.in

@@ -21,6 +21,7 @@ TARGETS = \
 	testgesture$(EXE) \
 	testgl2$(EXE) \
 	testgles$(EXE) \
+	testgles2$(EXE) \
 	testhaptic$(EXE) \
 	testrumble$(EXE) \
 	testthread$(EXE) \
@@ -131,6 +132,9 @@ testgl2$(EXE): $(srcdir)/testgl2.c
 testgles$(EXE): $(srcdir)/testgles.c
 	$(CC) -o $@ $^ $(CFLAGS) $(LIBS) @GLESLIB@ @MATHLIB@
 
+testgles2$(EXE): $(srcdir)/testgles2.c
+	$(CC) -o $@ $^ $(CFLAGS) $(LIBS) @GLES2LIB@ @MATHLIB@
+
 testhaptic$(EXE): $(srcdir)/testhaptic.c
 	$(CC) -o $@ $^ $(CFLAGS) $(LIBS)
 

test/configure

@@ -587,6 +587,7 @@ LIBOBJS
 SDL_TTF_LIB
 XLIB
 GLESLIB
+GLES2LIB
 GLLIB
 CPP
 XMKMF
@@ -3860,12 +3861,49 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_opengles" >&5
 $as_echo "$have_opengles" >&6; }
 
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for OpenGL ES2 support" >&5
+$as_echo_n "checking for OpenGL ES2 support... " >&6; }
+have_opengles2=no
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+ #if defined (__IPHONEOS__)
+    #include <OpenGLES/ES2/gl.h>
+    #include <OpenGLES/ES2/glext.h>
+ #else
+    #include <GLES2/gl2.h>
+    #include <GLES2/gl2ext.h>
+ #endif
+
+int
+main ()
+{
+
+
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+have_opengles2=yes
+
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $have_opengles2" >&5
+$as_echo "$have_opengles2" >&6; }
+
 GLLIB=""
 GLESLIB=""
+GLES2LIB=""
 if test x$have_opengles = xyes; then
     CFLAGS="$CFLAGS -DHAVE_OPENGLES"
     GLESLIB="$XPATH -lGLESv1_CM"
 fi
+if test x$have_opengles2 = xyes; then
+    CFLAGS="$CFLAGS -DHAVE_OPENGLES2"
+    GLES2LIB="$XPATH -lGLESv2"
+fi
 if test x$have_opengl = xyes; then
     CFLAGS="$CFLAGS -DHAVE_OPENGL"
     GLLIB="$XPATH $SYS_GL_LIBS"

test/configure.in

@@ -135,19 +135,42 @@ have_opengles=yes
 ])
 AC_MSG_RESULT($have_opengles)
 
+dnl Check for OpenGL ES2
+AC_MSG_CHECKING(for OpenGL ES2 support)
+have_opengles2=no
+AC_TRY_COMPILE([
+ #if defined (__IPHONEOS__)
+    #include <OpenGLES/ES2/gl.h>
+    #include <OpenGLES/ES2/glext.h>
+ #else
+    #include <GLES2/gl2.h>
+    #include <GLES2/gl2ext.h>
+ #endif
+],[
+],[
+have_opengles2=yes
+])
+AC_MSG_RESULT($have_opengles2)
+
 GLLIB=""
 GLESLIB=""
+GLES2LIB=""
 if test x$have_opengles = xyes; then
     CFLAGS="$CFLAGS -DHAVE_OPENGLES"
     GLESLIB="$XPATH -lGLESv1_CM"
 fi
+if test x$have_opengles2 = xyes; then
+    CFLAGS="$CFLAGS -DHAVE_OPENGLES2"
+    GLES2LIB="$XPATH -lGLESv2"
+fi
 if test x$have_opengl = xyes; then
     CFLAGS="$CFLAGS -DHAVE_OPENGL"
     GLLIB="$XPATH $SYS_GL_LIBS"
 fi
 
 AC_SUBST(GLLIB)
 AC_SUBST(GLESLIB)
+AC_SUBST(GLES2LIB)
 AC_SUBST(XLIB)
 
 dnl Check for SDL_ttf