Add a utility method to determine if a gl enum type is a matrix type, and some supporting methods.

src/libGLESv2/utilities.cpp

@@ -176,10 +176,16 @@ int VariableRowCount(GLenum type)
       case GL_SAMPLER_CUBE:
         return 1;
       case GL_FLOAT_MAT2:
+      case GL_FLOAT_MAT3x2:
+      case GL_FLOAT_MAT4x2:
         return 2;
       case GL_FLOAT_MAT3:
+      case GL_FLOAT_MAT2x3:
+      case GL_FLOAT_MAT4x3:
         return 3;
       case GL_FLOAT_MAT4:
+      case GL_FLOAT_MAT2x4:
+      case GL_FLOAT_MAT3x4:
         return 4;
       default:
         UNREACHABLE();
@@ -204,16 +210,22 @@ int VariableColumnCount(GLenum type)
       case GL_FLOAT_VEC2:
       case GL_INT_VEC2:
       case GL_FLOAT_MAT2:
+      case GL_FLOAT_MAT2x3:
+      case GL_FLOAT_MAT2x4:
         return 2;
       case GL_INT_VEC3:
       case GL_FLOAT_VEC3:
       case GL_BOOL_VEC3:
       case GL_FLOAT_MAT3:
+      case GL_FLOAT_MAT3x2:
+      case GL_FLOAT_MAT3x4:
         return 3;
       case GL_BOOL_VEC4:
       case GL_FLOAT_VEC4:
       case GL_INT_VEC4:
       case GL_FLOAT_MAT4:
+      case GL_FLOAT_MAT4x2:
+      case GL_FLOAT_MAT4x3:
         return 4;
       default:
         UNREACHABLE();
@@ -222,6 +234,11 @@ int VariableColumnCount(GLenum type)
     return 0;
 }
 
+bool IsMatrixType(GLenum type)
+{
+    return VariableRowCount(type) > 1;
+}
+
 int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize)
 {
     ASSERT(allocationSize <= bitsSize);

src/libGLESv2/utilities.h

@@ -29,6 +29,7 @@ size_t UniformExternalSize(GLenum type);
 GLenum UniformBoolVectorType(GLenum type);
 int VariableRowCount(GLenum type);
 int VariableColumnCount(GLenum type);
+bool IsMatrixType(GLenum type);
 
 int AllocateFirstFreeBits(unsigned int *bits, unsigned int allocationSize, unsigned int bitsSize);