Pixel-Art Editor

Original prompt

Build a small pixel-art editor.
It should support:
drawing,
erasing,
color selection,
brush size,
undo/redo,
zoom,
and exporting the result as PNG.

Chinese translation

构建一个小型像素画编辑器。它应支持绘制、擦除、颜色选择、画笔大小、撤销/重做、缩放以及将结果导出为 PNG。

Expected outcome

The deliverable should be a lightweight but complete pixel-art editor. Its workspace should use a discrete pixel grid, with drawing and erasing operating precisely on logical pixels and continuous strokes avoiding unintended gaps. Users should be able to choose color and brush size. Undo and redo must restore complete canvas states and correctly handle a new edit branch. Zooming should preserve nearest-neighbor hard edges without changing artwork data. PNG export should produce a valid file with the configured dimensions and transparency, excluding editor grids and cursor overlays.

Additional verification guidance

• Verify pixel data for clicks, slow and fast drags, multiple brush sizes, and strokes at canvas boundaries.
• Confirm erasing creates transparent rather than white pixels and that color changes affect only future strokes.
• Perform a multi-step edit, undo, redo, undo, and new edit; confirm correct history order and redo-branch invalidation.
• Check that multiple zoom levels remain crisp and data-invariant; export PNG and verify signature, dimensions, pixel colors, alpha, and scale behavior.