implement the complete stroke shader with custom blending mode

engine/shader.cpp

@@ -131,6 +131,7 @@ GLint ui::Shader::GetAttribLocation(const char* name)
 }
 bool ShaderManager::create(kShader id, const char* vertex, const char* fragment)
 {
+    m_shaders[id].name = id;
     return m_shaders[id].create(vertex, fragment);
 }