Implement writing image and half the platte information

src/Tools/tim_tool/src/logic/tim/mod.rs

@@ -75,7 +75,7 @@ impl TIMInfo {
         }
     }
 
-    pub fn change_palette_size(&mut self, width: u32, height: u32) -> Result<Option<slint::Image>, Error> {
+    pub fn change_palette_size(&mut self, width: u16, height: u16) -> Result<Option<slint::Image>, Error> {
         if let Some(palette) = &mut self.palette {
             if width == 0 || height == 0 {
                 return Err(Error::from_text(format!("{}px x {}px is not a valid size for palette", width, height)));
@@ -119,6 +119,16 @@ impl TIMInfo {
         })
     }
 
+    pub fn get_palette_size(&self) -> Option<(u16, u16)> {
+        if let Some(palette_info) = &self.palette {
+            Some((palette_info.width, palette_info.height))
+        }
+
+        else {
+            None
+        }
+    }
+
     pub fn get_path(&self) -> std::path::PathBuf {
         self.path.clone()
     }
@@ -127,8 +137,8 @@ impl TIMInfo {
 #[derive(Clone)]
 struct PaletteInfo {
     data:   Vec<Rgba8Pixel>,
-    width:  u32,
-    height: u32,
+    width:  u16,
+    height: u16,
 }
 
 impl PaletteInfo {
@@ -138,7 +148,7 @@ impl PaletteInfo {
     }
 
     pub fn get_image(&self) -> slint::Image {
-        let mut image_data = SharedPixelBuffer::new(self.width, self.height);
+        let mut image_data = SharedPixelBuffer::new(self.width as u32, self.height as u32);
         let     dst_pixels = image_data.make_mut_slice();
 
         for (idx, byte) in dst_pixels.iter_mut().enumerate() {