nmap/zenmap/radialnet/gui/Image.py

# vim: set fileencoding=utf-8 :

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import os
import gtk
import array

from zenmapCore.Paths import Path


FORMAT_RGBA = 4
FORMAT_RGB = 3


def get_pixels_for_cairo_image_surface(pixbuf):
    """
    This method return the image stride and a python array.ArrayType
    containing the icon pixels of a gtk.gdk.Pixbuf that can be used by
    cairo.ImageSurface.create_for_data() method.
    """
    data = array.ArrayType('c')
    format = pixbuf.get_rowstride() / pixbuf.get_width()

    i = 0
    j = 0
    while i < len(pixbuf.get_pixels()):

        b, g, r = pixbuf.get_pixels()[i:i + FORMAT_RGB]

        if format == FORMAT_RGBA:
            a = pixbuf.get_pixels()[i + FORMAT_RGBA - 1]
        elif format == FORMAT_RGB:
            a = '\xff'
        else:
            raise TypeError('unknown image format')

        data[j:j + FORMAT_RGBA] = array.ArrayType('c', [r, g, b, a])

        i += format
        j += FORMAT_RGBA

    return (FORMAT_RGBA * pixbuf.get_width(), data)


class Image:
    """
    """
    def __init__(self, path=None):
        """
        """
        self.__path = path
        self.__cache = dict()

    def set_path(self, path):
        """
        """
        self.__path = path

    def get_pixbuf(self, icon, image_type='png'):
        """
        """
        if self.__path is None:
            return False

        if icon + image_type not in self.__cache.keys():

            file = self.get_icon(icon, image_type)
            self.__cache[icon + image_type] = \
                    gtk.gdk.pixbuf_new_from_file(file)

        return self.__cache[icon + image_type]

    def get_icon(self, icon, image_type='png'):
        """
        """
        if self.__path is None:
            return False

        return os.path.join(self.__path, icon + "." + image_type)


class Pixmaps(Image):
    """
    """
    def __init__(self):
        """
        """
        Image.__init__(self, os.path.join(Path.pixmaps_dir, "radialnet"))


class Icons(Image):
    """
    """
    def __init__(self):
        """
        """
        Image.__init__(self, os.path.join(Path.pixmaps_dir, "radialnet"))


class Application(Image):
    """
    """
    def __init__(self):
        """
        """
        Image.__init__(self, os.path.join(Path.pixmaps_dir, "radialnet"))