source: trunk/essentials/dev-lang/python/Lib/plat-mac/PixMapWrapper.py@ 3393

"""PixMapWrapper - defines the PixMapWrapper class, which wraps an opaque
QuickDraw PixMap data structure in a handy Python class.  Also provides
methods to convert to/from pixel data (from, e.g., the img module) or a
Python Imaging Library Image object.

J. Strout <[email protected]>  February 1999"""

from Carbon import Qd
from Carbon import QuickDraw
import struct
import MacOS
import img
import imgformat

# PixMap data structure element format (as used with struct)
_pmElemFormat = {
    'baseAddr':'l',     # address of pixel data
    'rowBytes':'H',     # bytes per row, plus 0x8000
    'bounds':'hhhh',    # coordinates imposed over pixel data
        'top':'h',
        'left':'h',
        'bottom':'h',
        'right':'h',
    'pmVersion':'h',    # flags for Color QuickDraw
    'packType':'h',     # format of compression algorithm
    'packSize':'l',     # size after compression
    'hRes':'l',         # horizontal pixels per inch
    'vRes':'l',         # vertical pixels per inch
    'pixelType':'h',    # pixel format
    'pixelSize':'h',    # bits per pixel
    'cmpCount':'h',     # color components per pixel
    'cmpSize':'h',      # bits per component
    'planeBytes':'l',   # offset in bytes to next plane
    'pmTable':'l',      # handle to color table
    'pmReserved':'l'    # reserved for future use
}

# PixMap data structure element offset
_pmElemOffset = {
    'baseAddr':0,
    'rowBytes':4,
    'bounds':6,
        'top':6,
        'left':8,
        'bottom':10,
        'right':12,
    'pmVersion':14,