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- Committer: Bazaar Package Importer
- Author(s): Jeremie Corbier
- Date: 2007-05-29 12:48:02 UTC
- Revision ID: james.westby@ubuntu.com-20070529124802-7rqvjajce01xpyly
Tags: upstream-0.2.1
Import upstream version 0.2.1
added
removed
src/__init__.py
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# -*- coding: iso-8859-1 -*-
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# -----------------------------------------------------------------------------
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# Imlib2.py - Imlib2 wrapper for Python
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# -----------------------------------------------------------------------------
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# $Id: __init__.py 2604 2007-03-28 09:21:52Z dmeyer $
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# -----------------------------------------------------------------------------
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# kaa.imlib2 - An imlib2 wrapper for Python
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# Copyright (C) 2004-2006 Dirk Meyer, Jason Tackaberry
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#
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# First Edition: Jason Tackaberry <tack@urandom.ca>
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# Maintainer: Jason Tackaberry <tack@urandom.ca>
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#
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# Please see the file AUTHORS for a complete list of authors.
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#
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# This library is free software; you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License version
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# 2.1 as published by the Free Software Foundation.
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#
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# This library is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with this library; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301 USA
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#
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# -----------------------------------------------------------------------------
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import types
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import math
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import os
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import glob
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import md5
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from version import VERSION
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# imlib2 wrapper
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import _Imlib2
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# image and font wrapper
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from image import *
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from font import *
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# Implement a crude image cache.
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#
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# Imlib2 maintains its own cache, but I don't think it caches
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# the raw image data, since this ends up being faster.
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_image_cache = {
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"images": {},
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"order": [],
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"size": 0,
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"max-size": 16*1024 # 16 MB
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}
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def open_without_cache(file):
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"""
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Create a new image object from the file 'file' without using the
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internal cache.
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"""
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return Image(file, False)
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def open(file):
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"""
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Create a new image object from the file 'file'.
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"""
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if file in _image_cache["images"]:
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return _image_cache["images"][file].copy()
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image = Image(file)
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_image_cache["images"][file] = image
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_image_cache["order"].insert(0, file)
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_image_cache["size"] += image.width * image.height * 4 / 1024
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while _image_cache["size"] > _image_cache["max-size"]:
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file = _image_cache["order"].pop()
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expired = _image_cache["images"][file]
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del _image_cache["images"][file]
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_image_cache["size"] -= expired.width * expired.height * 4 / 1024
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return image
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def open_from_memory(buf):
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"""
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Create a new image object from a memory buffer.
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"""
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if type(buf) == str:
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buf = buffer(buf)
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img = _Imlib2.open_from_memory(buf)
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return Image(img)
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def new(size, bytes = None, from_format = "BGRA", copy = True):
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"""
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Generates a new Image of size 'size', which is a tuple holding the width
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and height. If 'bytes' is specified, the image is initialized from the
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raw BGRA data. If 'copy' is False, 'bytes' must be either a write buffer
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or an integer pointing to a location in memory that will be used to hold
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the image. (In this caes, from_format must be BGRA.)
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"""
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if 0 in size:
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raise ValueError, "Invalid image size %s" % repr(size)
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for val in size:
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if not isinstance(val, int):
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raise ValueError, "Invalid image size %s" % repr(size)
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if bytes:
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if False in map(lambda x: x in "RGBA", list(from_format)):
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raise ValueError, "Converting from unsupported format: " + from_format
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if type(bytes) != int and len(bytes) < size[0]*size[1]*len(from_format):
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raise ValueError, "Not enough bytes for converted format: expected %d, got %d" % \
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(size[0]*size[1]*len(from_format), len(bytes))
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return Image(_Imlib2.create(size, bytes, from_format, copy))
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else:
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return Image(_Imlib2.create(size))
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def add_font_path(path):
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"""
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Add the given path to the list of paths to scan when loading fonts.
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"""
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_Imlib2.add_font_path(path)
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def load_font(font, size):
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"""
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Return a Font object from the given font specified in the form
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'FontName/Size', such as 'Arial/16'
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"""
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return Font(font + "/" + str(size))
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def get_font_style_geometry(style):
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"""
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Return the additional pixel the font needs for the style. This function
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will return left, top, right, bottom as number of pixels the text will
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start to the left/top and the number of pixels it needs more at the
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right/bottom. To avoid extra calculations the function will also return
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the additional width and height needed for the style.
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"""
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return TEXT_STYLE_GEOMETRY[style]
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