GLSLCompat: support GLES compatibility

jme3-core/src/main/resources/Common/MatDefs/Misc/Unshaded.frag

@@ -1,4 +1,4 @@
-#import "Common/ShaderLib/GLSL150Compat.glsllib"
+#import "Common/ShaderLib/GLSLCompat.glsllib"
 
 #if defined(HAS_GLOWMAP) || defined(HAS_COLORMAP) || (defined(HAS_LIGHTMAP) && !defined(SEPARATE_TEXCOORD))
     #define NEED_TEXCOORD1

jme3-core/src/main/resources/Common/MatDefs/Misc/Unshaded.vert

@@ -1,4 +1,4 @@
-#import "Common/ShaderLib/GLSL150Compat.glsllib"
+#import "Common/ShaderLib/GLSLCompat.glsllib"
 #import "Common/ShaderLib/Skinning.glsllib"
 #import "Common/ShaderLib/Instancing.glsllib"
 

jme3-core/src/main/resources/Common/ShaderLib/GLSL150Compat.glsllib

@@ -1,14 +0,0 @@
-#if __VERSION__ >= 130
-out vec4 outFragColor;
-#  define texture1D texture
-#  define texture2D texture
-#  define texture3D texture
-#  define texture2DLod texture
-#  if defined VERTEX_SHADER
-#    define varying out
-#    define attribute in
-#  elif defined FRAGMENT_SHADER
-#    define varying in
-#    define gl_FragColor outFragColor
-#  endif
-#endif

jme3-core/src/main/resources/Common/ShaderLib/GLSLCompat.glsllib

@@ -0,0 +1,34 @@
+#if defined _GL_ES_
+#  define hfloat highp float
+#  define hvec2  highp vec2
+#  define hvec3  highp vec3
+#  define hvec4  highp vec4
+#  define lfloat lowp float
+#  define lvec2 lowp vec2
+#  define lvec3 lowp vec3
+#  define lvec4 lowp vec4
+#else
+#  define hfloat float
+#  define hvec2  vec2
+#  define hvec3  vec3
+#  define hvec4  vec4
+#  define lfloat float
+#  define lvec2  vec2
+#  define lvec3  vec3
+#  define lvec4  vec4
+#endif
+
+#if __VERSION__ >= 130
+out vec4 outFragColor;
+#  define texture1D texture
+#  define texture2D texture
+#  define texture3D texture
+#  define texture2DLod texture
+#  if defined VERTEX_SHADER
+#    define varying out
+#    define attribute in
+#  elif defined FRAGMENT_SHADER
+#    define varying in
+#    define gl_FragColor outFragColor
+#  endif
+#endif