这是个图想处理的程序。包括：二维图像变化（平移、旋转、缩放等）和图像的裁剪（包括线段的裁剪和多边形的裁剪）。-This is a map to handling procedures. Including: two-dimensional image changes (translation, rotation, scaling, etc.) and image cropping (including line and polygon clipping cut)