make seperate struct for buffer

src/imgdata.rs

@@ -22,7 +22,7 @@ impl Clone for ThinGridData {
 
 impl ThinGridData {
     // Convert Grid to ThinGridData
-    pub fn from_grid(in_grid: &Grid) -> Self {
+    pub fn new_from_grid(in_grid: &Grid) -> Self {
         ThinGridData {
             width: in_grid.width,
             height: in_grid.height,
@@ -31,9 +31,9 @@ impl ThinGridData {
     }
 
     #[allow(dead_code)]
-    pub fn from_grid_vec(in_grids: Vec<Grid>) -> Vec<Self> {
+    pub fn new_from_grid_vec(in_grids: Vec<Grid>) -> Vec<Self> {
         return in_grids.iter().map(|grid|{
-            Self::from_grid(grid)
+            Self::new_from_grid(grid)
         }).collect();
     }