#!/usr/bin/env python3 import gi, cairo, math gi.require_version('Gtk', '3.0') from gi.repository import Gtk, Gdk, GdkPixbuf class ScaleImage(Gtk.Image): def __init__(self, filepath): Gtk.Image.__init__(self) self.origin = GdkPixbuf.Pixbuf.new_from_file(filepath) self.pixbuf = self.origin self.width = self.origin.get_width() self.height = self.origin.get_height() self.set_from_pixbuf(self.origin) def resize(self, width, height): self.width = width self.height = height self.pixbuf = self.origin.scale_simple(width, height, GdkPixbuf.InterpType.BILINEAR) self.set_from_pixbuf(self.pixbuf) def set_radius(self, radius = 0): w = self.width h = self.height surface = cairo.ImageSurface(cairo.Format.ARGB32, w, h) ctx = cairo.Context(surface) Gdk.cairo_set_source_pixbuf(ctx, self.pixbuf, 0, 0) # 左上角 圆角 ctx.arc(radius, radius, radius, -math.pi, -math.pi / 2.) ctx.line_to(w - radius, 0) # 右上角 圆角 ctx.arc(w - radius, radius, radius, -math.pi / 2., 0) ctx.line_to(w, -radius) # 右下角 圆角 ctx.arc(w - radius, h - radius, radius, 0, math.pi / 2.) ctx.line_to(radius, h) # 左下角 圆角 ctx.arc(radius, h - radius, radius, math.pi / 2., math.pi) ctx.close_path() ctx.clip() ctx.paint() pixbuf = Gdk.pixbuf_get_from_surface(surface, 0, 0, w, h) self.set_from_pixbuf(pixbuf)