If function doesn't do anything related to object just don't pass object to it

src/render/CpuRenderEngine.zig

@@ -66,9 +66,7 @@ fn renderGradient(self: CpuRenderEngine, pixels: []Color.PMA, width: u32, height
     }
 }
 
-fn renderSquares(self: CpuRenderEngine, pixels: []Color.PMA, canvas_size: Size_i, visible_rect: Rect_i) void {
-    _ = self;
-
+fn renderSquares(pixels: []Color.PMA, canvas_size: Size_i, visible_rect: Rect_i) void {
     const colors = [_]Color.PMA{
         .{ .r = 255, .g = 0, .b = 0, .a = 255 },
         .{ .r = 255, .g = 165, .b = 0, .a = 255 },
@@ -169,7 +167,7 @@ pub fn example(self: CpuRenderEngine, canvas_size: Size_i, visible_rect: Rect_i)
 
     switch (self.type) {
         .Gradient => self.renderGradient(pixels, width, height, full_w, full_h, visible_rect),
-        .Squares => self.renderSquares(pixels, canvas_size, visible_rect),
+        .Squares => renderSquares(pixels, canvas_size, visible_rect),
     }
 
     return try dvui.textureCreate(pixels, width, height, .nearest, .rgba_8_8_8_8);

src/render/cpu/pipeline.zig

@@ -273,7 +273,7 @@ const FillCanvas = struct {
         }.lessThan);
 
         // Семена: по строкам находим сегменты (пары x), пересекаем с окном буфера, берём середину сегмента.
-        var seeds = findFillSeeds(self, keys_buf.items, buf_w_i, buf_h_i, allocator) catch return;
+        var seeds = findFillSeeds(keys_buf.items, buf_w_i, buf_h_i, allocator) catch return;
         defer seeds.deinit(allocator);
 
         var stack = std.ArrayList(Point2_i).empty;
@@ -304,13 +304,11 @@ const FillCanvas = struct {
 
     /// По строкам: рёбра (подряд идущие x) → сегменты между ними. Семена — середины чётных сегментов (при чётном числе границ).
     fn findFillSeeds(
-        self: *const FillCanvas,
         keys: []const Point2_i,
         buf_w_i: i32,
         buf_h_i: i32,
         allocator: std.mem.Allocator,
     ) !std.ArrayList(Point2_i) {
-        _ = self;
         var list = std.ArrayList(Point2_i).empty;
         errdefer list.deinit(allocator);
         var segments = std.ArrayList(struct { left: i32, right: i32 }).empty;