180 lines
4.9 KiB
Python
180 lines
4.9 KiB
Python
#
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# The Python Imaging Library
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# $Id$
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#
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# WCK-style drawing interface operations
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#
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# History:
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# 2003-12-07 fl created
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# 2005-05-15 fl updated; added to PIL as ImageDraw2
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# 2005-05-15 fl added text support
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# 2005-05-20 fl added arc/chord/pieslice support
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#
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# Copyright (c) 2003-2005 by Secret Labs AB
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# Copyright (c) 2003-2005 by Fredrik Lundh
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#
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# See the README file for information on usage and redistribution.
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#
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"""
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(Experimental) WCK-style drawing interface operations
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.. seealso:: :py:mod:`PIL.ImageDraw`
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"""
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from . import Image, ImageColor, ImageDraw, ImageFont, ImagePath
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class Pen:
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"""Stores an outline color and width."""
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def __init__(self, color, width=1, opacity=255):
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self.color = ImageColor.getrgb(color)
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self.width = width
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class Brush:
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"""Stores a fill color"""
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def __init__(self, color, opacity=255):
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self.color = ImageColor.getrgb(color)
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class Font:
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"""Stores a TrueType font and color"""
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def __init__(self, color, file, size=12):
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# FIXME: add support for bitmap fonts
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self.color = ImageColor.getrgb(color)
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self.font = ImageFont.truetype(file, size)
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class Draw:
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"""
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(Experimental) WCK-style drawing interface
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"""
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def __init__(self, image, size=None, color=None):
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if not hasattr(image, "im"):
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image = Image.new(image, size, color)
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self.draw = ImageDraw.Draw(image)
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self.image = image
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self.transform = None
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def flush(self):
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return self.image
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def render(self, op, xy, pen, brush=None):
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# handle color arguments
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outline = fill = None
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width = 1
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if isinstance(pen, Pen):
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outline = pen.color
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width = pen.width
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elif isinstance(brush, Pen):
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outline = brush.color
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width = brush.width
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if isinstance(brush, Brush):
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fill = brush.color
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elif isinstance(pen, Brush):
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fill = pen.color
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# handle transformation
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if self.transform:
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xy = ImagePath.Path(xy)
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xy.transform(self.transform)
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# render the item
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if op == "line":
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self.draw.line(xy, fill=outline, width=width)
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else:
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getattr(self.draw, op)(xy, fill=fill, outline=outline)
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def settransform(self, offset):
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"""Sets a transformation offset."""
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(xoffset, yoffset) = offset
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self.transform = (1, 0, xoffset, 0, 1, yoffset)
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def arc(self, xy, start, end, *options):
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"""
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Draws an arc (a portion of a circle outline) between the start and end
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angles, inside the given bounding box.
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.. seealso:: :py:meth:`PIL.ImageDraw.ImageDraw.arc`
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"""
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self.render("arc", xy, start, end, *options)
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def chord(self, xy, start, end, *options):
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"""
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Same as :py:meth:`~PIL.ImageDraw2.Draw.arc`, but connects the end points
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with a straight line.
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.. seealso:: :py:meth:`PIL.ImageDraw.ImageDraw.chord`
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"""
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self.render("chord", xy, start, end, *options)
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def ellipse(self, xy, *options):
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"""
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Draws an ellipse inside the given bounding box.
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.. seealso:: :py:meth:`PIL.ImageDraw.ImageDraw.ellipse`
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"""
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self.render("ellipse", xy, *options)
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def line(self, xy, *options):
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"""
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Draws a line between the coordinates in the ``xy`` list.
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.. seealso:: :py:meth:`PIL.ImageDraw.ImageDraw.line`
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"""
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self.render("line", xy, *options)
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def pieslice(self, xy, start, end, *options):
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"""
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Same as arc, but also draws straight lines between the end points and the
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center of the bounding box.
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.. seealso:: :py:meth:`PIL.ImageDraw.ImageDraw.pieslice`
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"""
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self.render("pieslice", xy, start, end, *options)
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def polygon(self, xy, *options):
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"""
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Draws a polygon.
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The polygon outline consists of straight lines between the given
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coordinates, plus a straight line between the last and the first
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coordinate.
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.. seealso:: :py:meth:`PIL.ImageDraw.ImageDraw.polygon`
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"""
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self.render("polygon", xy, *options)
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def rectangle(self, xy, *options):
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"""
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Draws a rectangle.
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.. seealso:: :py:meth:`PIL.ImageDraw.ImageDraw.rectangle`
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"""
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self.render("rectangle", xy, *options)
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def text(self, xy, text, font):
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"""
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Draws the string at the given position.
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.. seealso:: :py:meth:`PIL.ImageDraw.ImageDraw.text`
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"""
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if self.transform:
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xy = ImagePath.Path(xy)
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xy.transform(self.transform)
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self.draw.text(xy, text, font=font.font, fill=font.color)
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def textsize(self, text, font):
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"""
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Return the size of the given string, in pixels.
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.. seealso:: :py:meth:`PIL.ImageDraw.ImageDraw.textsize`
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"""
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return self.draw.textsize(text, font=font.font)
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