Warning comment has been added

Author: bugsweeper

examples/app/headless_renderer.rs

@@ -360,6 +360,10 @@ impl render_graph::Node for ImageCopyDriver {
             let block_dimensions = src_image.texture_format.block_dimensions();
             let block_size = src_image.texture_format.block_copy_size(None).unwrap();
 
+            // Calculating correct size of image row because
+            // copy_texture_to_buffer can copy image only by rows aligned wgpu::COPY_BYTES_PER_ROW_ALIGNMENT
+            // That's why image in buffer can be little bit wider
+            // This should be taken into account
             let padded_bytes_per_row = RenderDevice::align_copy_bytes_per_row(
                 (src_image.size.x as usize / block_dimensions.0 as usize) * block_size as usize,
             );