pygame / lib / cursors.py

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##    pygame - Python Game Library
##    Copyright (C) 2000-2003  Pete Shinners
##
##    This library is free software; you can redistribute it and/or
##    modify it under the terms of the GNU Library General Public
##    License as published by the Free Software Foundation; either
##    version 2 of the License, or (at your option) any later version.
##
##    This library is distributed in the hope that it will be useful,
##    but WITHOUT ANY WARRANTY; without even the implied warranty of
##    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
##    Library General Public License for more details.
##
##    You should have received a copy of the GNU Library General Public
##    License along with this library; if not, write to the Free
##    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
##
##    Pete Shinners
##    pete@shinners.org

"""Set of cursor resources available for use. These cursors come
in a sequence of values that are needed as the arguments for
pygame.mouse.set_cursor(). to dereference the sequence in place
and create the cursor in one step, call like this;
pygame.mouse.set_cursor(*pygame.cursors.arrow).

Here is a list of available cursors; arrow, diamond, ball,
        broken_x, tri_left, tri_right

There is also a sample string cursor named 'thickarrow_strings'.
The compile() function can convert these string cursors into cursor byte data.
"""

#default pygame black arrow
arrow = ((16, 16), (0, 0),
    (0x00,0x00,0x40,0x00,0x60,0x00,0x70,0x00,0x78,0x00,0x7C,0x00,0x7E,0x00,0x7F,0x00,
     0x7F,0x80,0x7C,0x00,0x6C,0x00,0x46,0x00,0x06,0x00,0x03,0x00,0x03,0x00,0x00,0x00),
    (0x40,0x00,0xE0,0x00,0xF0,0x00,0xF8,0x00,0xFC,0x00,0xFE,0x00,0xFF,0x00,0xFF,0x80,
     0xFF,0xC0,0xFF,0x80,0xFE,0x00,0xEF,0x00,0x4F,0x00,0x07,0x80,0x07,0x80,0x03,0x00))

diamond = ((16, 16), (7, 7),
    (0, 0, 1, 0, 3, 128, 7, 192, 14, 224, 28, 112, 56, 56, 112, 28, 56,
     56, 28, 112, 14, 224, 7, 192, 3, 128, 1, 0, 0, 0, 0, 0),
    (1, 0, 3, 128, 7, 192, 15, 224, 31, 240, 62, 248, 124, 124, 248, 62,
     124, 124, 62, 248, 31, 240, 15, 224, 7, 192, 3, 128, 1, 0, 0, 0))

ball = ((16, 16), (7, 7),
    (0, 0, 3, 192, 15, 240, 24, 248, 51, 252, 55, 252, 127, 254, 127, 254,
     127, 254, 127, 254, 63, 252, 63, 252, 31, 248, 15, 240, 3, 192, 0, 0),
    (3, 192, 15, 240, 31, 248, 63, 252, 127, 254, 127, 254, 255, 255, 255,
     255, 255, 255, 255, 255, 127, 254, 127, 254, 63, 252, 31, 248, 15, 240,
     3, 192))

broken_x = ((16, 16), (7, 7),
    (0, 0, 96, 6, 112, 14, 56, 28, 28, 56, 12, 48, 0, 0, 0, 0, 0, 0, 0, 0,
     12, 48, 28, 56, 56, 28, 112, 14, 96, 6, 0, 0),
    (224, 7, 240, 15, 248, 31, 124, 62, 62, 124, 30, 120, 14, 112, 0, 0, 0,
     0, 14, 112, 30, 120, 62, 124, 124, 62, 248, 31, 240, 15, 224, 7))


tri_left = ((16, 16), (1, 1),
    (0, 0, 96, 0, 120, 0, 62, 0, 63, 128, 31, 224, 31, 248, 15, 254, 15, 254,
     7, 128, 7, 128, 3, 128, 3, 128, 1, 128, 1, 128, 0, 0),
    (224, 0, 248, 0, 254, 0, 127, 128, 127, 224, 63, 248, 63, 254, 31, 255,
     31, 255, 15, 254, 15, 192, 7, 192, 7, 192, 3, 192, 3, 192, 1, 128))

tri_right = ((16, 16), (14, 1),
    (0, 0, 0, 6, 0, 30, 0, 124, 1, 252, 7, 248, 31, 248, 127, 240, 127, 240,
     1, 224, 1, 224, 1, 192, 1, 192, 1, 128, 1, 128, 0, 0),
    (0, 7, 0, 31, 0, 127, 1, 254, 7, 254, 31, 252, 127, 252, 255, 248, 255,
     248, 127, 240, 3, 240, 3, 224, 3, 224, 3, 192, 3, 192, 1, 128))



#here is an example string resource cursor. to use this;
#  curs, mask = pygame.cursors.compile_cursor(pygame.cursors.thickarrow_strings, 'X', '.')
#  pygame.mouse.set_cursor((24, 24), (0, 0), curs, mask)

thickarrow_strings = (               #sized 24x24
  "XX                      ",
  "XXX                     ",
  "XXXX                    ",
  "XX.XX                   ",
  "XX..XX                  ",
  "XX...XX                 ",
  "XX....XX                ",
  "XX.....XX               ",
  "XX......XX              ",
  "XX.......XX             ",
  "XX........XX            ",
  "XX........XXX           ",
  "XX......XXXXX           ",
  "XX.XXX..XX              ",
  "XXXX XX..XX             ",
  "XX   XX..XX             ",
  "     XX..XX             ",
  "      XX..XX            ",
  "      XX..XX            ",
  "       XXXX             ",
  "       XX               ",
  "                        ",
  "                        ",
  "                        ",
)

sizer_x_strings = (               #sized 24x16
 "     X      X           ",
 "    XX      XX          ",
 "   X.X      X.X         ",
 "  X..X      X..X        ",
 " X...XXXXXXXX...X       ",
 "X................X      ",
 " X...XXXXXXXX...X       ",
 "  X..X      X..X        ",
 "   X.X      X.X         ",
 "    XX      XX          ",
 "     X      X           ",
 "                        ",
 "                        ",
 "                        ",
 "                        ",
 "                        ",
)
sizer_y_strings = (               #sized 16x24
 "     X          ",
 "    X.X         ",
 "   X...X        ",
 "  X.....X       ",
 " X.......X      ",
 "XXXXX.XXXXX     ",
 "    X.X         ",
 "    X.X         ",
 "    X.X         ",
 "    X.X         ",
 "    X.X         ",
 "    X.X         ",
 "    X.X         ",
 "XXXXX.XXXXX     ",
 " X.......X      ",
 "  X.....X       ",
 "   X...X        ",
 "    X.X         ",
 "     X          ",
 "                ",
 "                ",
 "                ",
 "                ",
 "                ",
)
sizer_xy_strings = (               #sized 24x16
 "XXXXXXXX                ",
 "X.....X                 ",
 "X....X                  ",
 "X...X                   ",
 "X..X.X                  ",
 "X.X X.X                 ",
 "XX   X.X    X           ",
 "X     X.X  XX           ",
 "       X.XX.X           ",
 "        X...X           ",
 "        X...X           ",
 "       X....X           ",
 "      X.....X           ",
 "     XXXXXXXX           ",
 "                        ",
 "                        ",
)
textmarker_strings = (               #sized 8x16
 "ooo ooo ",
 "   o    ",
 "   o    ",
 "   o    ",
 "   o    ",
 "   o    ",
 "   o    ",
 "   o    ",
 "   o    ",
 "   o    ",
 "   o    ",
 "ooo ooo ",
 "        ",
 "        ",
 "        ",
 "        ",
)



def compile(strings, black='X', white='.',xor='o'):
   """pygame.cursors.compile(strings, black, white,xor) -> data, mask
compile cursor strings into cursor data

This takes a set of strings with equal length and computes
the binary data for that cursor. The string widths must be
divisible by 8.

The black and white arguments are single letter strings that
tells which characters will represent black pixels, and which
characters represent white pixels. All other characters are
considered clear.

This returns a tuple containing the cursor data and cursor mask
data. Both these arguments are used when setting a cursor with
pygame.mouse.set_cursor().
"""

   #first check for consistent lengths
   size = len(strings[0]), len(strings)
   if size[0] % 8 or size[1] % 8:
       raise ValueError("cursor string sizes must be divisible by 8 %s" %
                        size)
   for s in strings[1:]:
       if len(s) != size[0]:
           raise ValueError("Cursor strings are inconsistent lengths")

   #create the data arrays.
   #this could stand a little optimizing
   maskdata = []
   filldata = []
   maskitem = fillitem = 0
   step = 8
   for s in strings:
       for c in s:
           maskitem = maskitem << 1
           fillitem = fillitem << 1
           step = step - 1
           if c == black:
               maskitem = maskitem | 1
           elif c == white:
               maskitem = maskitem | 1
               fillitem = fillitem | 1
           elif c == xor:
               fillitem = fillitem | 1
           if not step:
               maskdata.append(maskitem)
               filldata.append(fillitem)
               maskitem = fillitem = 0
               step = 8
   return tuple(filldata), tuple(maskdata)




def load_xbm(curs, mask):
    """pygame.cursors.load_xbm(cursorfile, maskfile) -> cursor_args
reads a pair of XBM files into set_cursor arguments

Arguments can either be filenames or filelike objects
with the readlines method. Not largely tested, but
should work with typical XBM files.
"""
    def bitswap(num):
        val = 0
        for x in range(8):
            b = num&(1<<x) != 0
            val = val<<1 | b
        return val
    if type(curs) is type(''): curs = open(curs)
    if type(mask) is type(''): mask = open(mask)
    curs = curs.readlines()
    mask = mask.readlines()
    #avoid comments
    for line in range(len(curs)):
        if curs[line].startswith("#define"):
            curs = curs[line:]
            break
    for line in range(len(mask)):
        if mask[line].startswith("#define"):
            mask = mask[line:]
            break
    #load width,height
    width = int(curs[0].split()[-1])
    height = int(curs[1].split()[-1])
    #load hotspot position
    if curs[2].startswith('#define'):
        hotx = int(curs[2].split()[-1])
        hoty = int(curs[3].split()[-1])
    else:
        hotx = hoty = 0

    info = width, height, hotx, hoty

    for line in range(len(curs)):
        if curs[line].startswith('static char') or curs[line].startswith('static unsigned char'):
            break
    data = ' '.join(curs[line+1:]).replace('};', '').replace(',', ' ')
    cursdata = []
    for x in data.split():
        cursdata.append(bitswap(int(x, 16)))
    cursdata = tuple(cursdata)

    for line in range(len(mask)):
        if mask[line].startswith('static char') or mask[line].startswith('static unsigned char'):
            break
    data = ' '.join(mask[line+1:]).replace('};', '').replace(',', ' ')
    maskdata = []
    for x in data.split():
        maskdata.append(bitswap(int(x, 16)))
    maskdata = tuple(maskdata)
    return info[:2], info[2:], cursdata, maskdata
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