gl_rasterizer: Normalize vertex array data as appropriate.

src/video_core/engines/maxwell_3d.h

@@ -222,6 +222,10 @@ public:
                 UNREACHABLE();
                 return {};
             }
+
+            bool IsNormalized() const {
+                return (type == Type::SignedNorm) || (type == Type::UnsignedNorm);
+            }
         };
 
         enum class PrimitiveTopology : u32 {

src/video_core/renderer_opengl/gl_rasterizer.cpp

@@ -178,7 +178,7 @@ void RasterizerOpenGL::SetupVertexArray(u8* array_ptr, GLintptr buffer_offset) {
     for (unsigned index = 0; index < 16; ++index) {
         auto& attrib = regs.vertex_attrib_format[index];
         glVertexAttribPointer(index, attrib.ComponentCount(), MaxwellToGL::VertexType(attrib),
-                              GL_FALSE, vertex_array.stride,
+                              attrib.IsNormalized() ? GL_TRUE : GL_FALSE, vertex_array.stride,
                               reinterpret_cast<GLvoid*>(buffer_offset + attrib.offset));
         glEnableVertexAttribArray(index);
         hw_vao_enabled_attributes[index] = true;