Add a PositionTranslate func and add Errors for TextureSize mismatch

include/pd/lithium/texture.hpp

@@ -16,6 +16,18 @@ enum class TextureFormat {
   A8,
 };
 namespace Li {
+static int TextureFormat2Bpp(TextureFormat fmt) {
+  switch (fmt) {
+    case PD::TextureFormat::A8:
+      return 1;
+    case PD::TextureFormat::RGB24:
+      return 3;
+    case PD::TextureFormat::RGBA32:
+      return 4;
+    default:
+      return 0;
+  }
+}
 class Texture {
  public:
   using Ptr = Texture*;