added node alignment and text color

engine/layout.h

@@ -29,6 +29,8 @@ enum class kAttribute : uint16_t
     Text        = const_hash("text"),
     FontFace    = const_hash("font-face"),
     FontSize    = const_hash("font-size"),
+    Justify     = const_hash("justify"),
+    Align       = const_hash("align"),
 };
 
 enum class kWidget : uint16_t
@@ -222,10 +224,13 @@ public:
     TextMesh m_text_mesh;
     std::string m_text;
     std::string m_font;
+    glm::vec4 m_color{ 1, 1, 1, 1 };
     int m_size;
     virtual std::unique_ptr<Widget> clone() override
     { 
-        return nullptr;
+        auto ret = std::make_unique<WidgetText>();
+        *ret = *this;
+        return std::move(ret);
     }
     virtual void create() override
     {
@@ -240,6 +245,7 @@ public:
         ShaderManager::use(kShader::Font);
         ShaderManager::u_int(kShaderUniform::Tex, 0);
         ShaderManager::u_mat4(kShaderUniform::MVP, mvp);
+        ShaderManager::u_vec4(kShaderUniform::Col, m_color);
         m_text_mesh.draw();
     }
     virtual void parse_attributes(kAttribute ka, const tinyxml2::XMLAttribute* attr) override
@@ -255,6 +261,16 @@ public:
         case kAttribute::FontSize:
             m_size = attr->IntValue();
             break;
+        case kAttribute::Color:
+        {
+            glm::vec4 pad;
+            int n = sscanf(attr->Value(), "%f %f %f %f", &pad.x, &pad.y, &pad.z, &pad.w);
+            if (n == 1)
+                m_color = glm::vec4(pad.x);
+            else
+                m_color = pad;
+            break;
+        }
         default:
             break;
         }