Add support for querying major and minor GL version in ES3 contexts.

src/libGLESv2/Context.cpp

@@ -1685,6 +1685,8 @@ bool Context::getIntegerv(GLenum pname, GLint *params)
       case GL_MAX_VERTEX_UNIFORM_BLOCKS:                *params = mRenderer->getMaxVertexShaderUniformBuffers();        break;
       case GL_MAX_FRAGMENT_UNIFORM_BLOCKS:              *params = mRenderer->getMaxFragmentShaderUniformBuffers();      break;
       case GL_MAX_COMBINED_UNIFORM_BLOCKS:              *params = getMaximumCombinedUniformBufferBindings();            break;
+      case GL_MAJOR_VERSION:                            *params = mClientVersion;                                       break;
+      case GL_MINOR_VERSION:                            *params = 0;                                                    break;
       case GL_MAX_TRANSFORM_FEEDBACK_SEPARATE_ATTRIBS:  *params = 0; UNIMPLEMENTED();                                   break;
       case GL_NUM_COMPRESSED_TEXTURE_FORMATS:   
         params[0] = mNumCompressedTextureFormats;
@@ -2223,6 +2225,8 @@ bool Context::getQueryParameterInfo(GLenum pname, GLenum *type, unsigned int *nu
       case GL_MAX_VERTEX_UNIFORM_COMPONENTS:
       case GL_MAX_FRAGMENT_UNIFORM_COMPONENTS:
       case GL_NUM_EXTENSIONS:
+      case GL_MAJOR_VERSION:
+      case GL_MINOR_VERSION:
         {
             *type = GL_INT;
             *numParams = 1;