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

@@ -9,10 +9,10 @@ pub struct TIMInfo {
 
 impl TIMInfo {
     pub fn from_image(path: &PathBuf) -> Result<TIMInfo, Error> {
-        fn make_color(iter: &mut dyn std::iter::Iterator<Item = &u8>) -> Option<Rgba8Pixel> { 
+        fn make_color(iter: &mut dyn std::iter::Iterator<Item = &u8>, load_alpha: bool) -> Option<Rgba8Pixel> { 
             Some(Rgba8Pixel::new(
                 *iter.next()?, *iter.next()?, *iter.next()?, 
-                0xFF))
+                if load_alpha {*iter.next()?} else {0xFF}))
         }
     
         let mut reader = png::Decoder::new(File::open(path)?).read_info().or_else(|error| {Err(Error::from_error(error))})?;
@@ -20,19 +20,24 @@ impl TIMInfo {
         
         let mut buffer          = vec![0; reader.output_buffer_size()];
         let     frame_info      = reader.next_frame(&mut buffer).or_else(|error| {Err(Error::from_error(error))})?;
+        let     bytes_per_pixel = info.bytes_per_pixel();
         let     bit_depth       = frame_info.bit_depth;
         let mut image_data      = SharedPixelBuffer::new(frame_info.width, frame_info.height);
+        let mut dst_pixels      = image_data.make_mut_slice();
+
+        if bytes_per_pixel != 3 && bytes_per_pixel != 4 {
+            return Err(Error::from_text(format!("Image has {} bytes per pixel, but only 3 and 4 bytes per pixel are supported", bytes_per_pixel)));
+        }
 
         if info.color_type == png::ColorType::Indexed {
             let palette = info.palette.ok_or(Error::from_str("Found indexed PNG without palette"))?;
             let mut palette_colors = Vec::new();
             let mut iter           = palette.iter();
     
-            while let Some(color) = make_color(&mut iter) {
+            while let Some(color) = make_color(&mut iter, false) {
                 palette_colors.push(color);
             }
 
-            let mut dst_pixels  = image_data.make_mut_slice();
             for byte in buffer.into_iter() {
                 match bit_depth {
                     png::BitDepth::Four  => {
@@ -44,15 +49,24 @@ impl TIMInfo {
                         dst_pixels[0] = palette_colors[byte as usize];
                         dst_pixels    = &mut dst_pixels[1..];
                     },
-                    _                    => {return Err(Error::from_str("Only 4 and 8bit color depth are supported"));}
+                    _                    => {return Err(Error::from_str("Only 4 and 8bit color depth are supported for indexed color images"));}
                 }
             }
-
             Ok(TIMInfo{image_data, palette: Some(palette_colors)})
         }
     
         else {
-            Err(Error::not_implemented("Support for non indexed images"))
+            let mut byte_iter = buffer.iter();
+            while let Some(color) = make_color(&mut byte_iter, bytes_per_pixel == 4) {
+                match bit_depth {
+                    png::BitDepth::Eight => {
+                        dst_pixels[0] = color;
+                        dst_pixels    = &mut dst_pixels[1..];
+                    }
+                    _                    => {return Err(Error::from_str("Only 8bit color depth are supported for direct color images"));}
+                }
+            }
+            Ok(TIMInfo{image_data, palette: None})
         }
     }