93 lines
2.3 KiB
Python
93 lines
2.3 KiB
Python
#!/usr/bin/env python3
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import gi, cairo, math
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gi.require_version('Gtk', '3.0')
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from gi.repository import Gtk, Gdk, GdkPixbuf
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class ScaleImage(Gtk.Image):
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def __init__(self, filepath):
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Gtk.Image.__init__(self)
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self.width = None
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self.height = None
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self.reset(filepath)
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def reset(self, filepath):
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if type(filepath) == str:
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self.origin = GdkPixbuf.Pixbuf.new_from_file(filepath)
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else:
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self.origin = filepath
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if self.width is None:
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self.pixbuf = self.origin
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self.width = self.origin.get_width()
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self.height = self.origin.get_height()
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else:
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self.pixbuf = self.origin.scale_simple(self.width, self.height, GdkPixbuf.InterpType.BILINEAR)
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self.set_from_pixbuf(self.pixbuf)
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return self
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def resize(self, width, height):
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self.width = width
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self.height = height
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self.pixbuf = self.origin.scale_simple(width, height, GdkPixbuf.InterpType.BILINEAR)
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self.set_from_pixbuf(self.pixbuf)
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return self
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def set_radius(self, radius = 0):
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w = self.width
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h = self.height
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surface = cairo.ImageSurface(cairo.Format.ARGB32, w, h)
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ctx = cairo.Context(surface)
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Gdk.cairo_set_source_pixbuf(ctx, self.pixbuf, 0, 0)
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# 左上角 圆角
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ctx.arc(radius, radius, radius, -math.pi, -math.pi / 2)
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ctx.line_to(w - radius, 0)
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# 右上角 圆角
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ctx.arc(w - radius, radius, radius, -math.pi / 2, 0)
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ctx.line_to(w, -radius)
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# 右下角 圆角
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ctx.arc(w - radius, h - radius, radius, 0, math.pi / 2)
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ctx.line_to(radius, h)
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# 左下角 圆角
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ctx.arc(radius, h - radius, radius, math.pi / 2, math.pi)
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ctx.close_path()
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ctx.clip()
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ctx.paint()
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pixbuf = Gdk.pixbuf_get_from_surface(surface, 0, 0, w, h)
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self.set_from_pixbuf(pixbuf)
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return self
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# 旋转不生效
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def rotate(self, deg = 0, point = None):
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w = self.width
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h = self.height
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surface = cairo.ImageSurface(cairo.Format.ARGB32, w, h)
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ctx = cairo.Context(surface)
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Gdk.cairo_set_source_pixbuf(ctx, self.pixbuf, 0, 0)
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# 圆心坐标
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if point is None:
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point = (w / 2, h / 2)
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ctx.translate(point[0], point[1])
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ctx.rotate((deg / 180) * math.pi)
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ctx.paint()
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pixbuf = Gdk.pixbuf_get_from_surface(surface, 0, 0, w, h)
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self.set_from_pixbuf(pixbuf)
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return self |