added render target and bezier classes, added stroke settings panel

engine/shader.cpp

@@ -120,6 +120,10 @@ void Shader::u_int(kShaderUniform id, int i)
 {
     glUniform1i(m_umap[id], i);
 }
+void Shader::u_float(kShaderUniform id, float f)
+{
+    glUniform1f(m_umap[id], f);
+}
 
 bool ShaderManager::create(kShader id, const char* vertex, const char* fragment)
 {
@@ -157,3 +161,7 @@ void ShaderManager::u_int(kShaderUniform id, int i)
 {
     m_current->u_int(id, i);
 }
+void ui::ShaderManager::u_float(kShaderUniform id, float f)
+{
+    m_current->u_float(id, f);
+}