SDLPP: add option to get SRC rect of texture

sdlpp/sdlpp_renderobject.cpp

@@ -223,6 +223,9 @@ void RenderObject::setTextureSourceRect( const SDL_Rect &source_rect ) {
 void RenderObject::setTextureSourceRect( int x, int y, int w, int h ) {
     setTextureSourceRect( { x, y, w, h } );
 }
+SDL_Rect RenderObject::getTextureSourceRect() const {
+    return src_rect;
+}
 void RenderObject::setAnimationFrames( const std::vector< SDL_Rect > &frames ) {
     animation = frames;
 }