cpython/Mac/Demo/imgbrowse/mac_image.py

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"""mac_image - Helper routines (hacks) for images"""
import imgformat
from Carbon import Qd
import struct
import MacOS
_fmt_to_mac = {
imgformat.macrgb16 : (16, 16, 3, 5),
}
def mkpixmap(w, h, fmt, data):
"""kludge a pixmap together"""
fmtinfo = _fmt_to_mac[fmt]
rv = struct.pack("lHhhhhhhlllhhhhlll",
id(data)+MacOS.string_id_to_buffer, # HACK HACK!!
w*2 + 0x8000,
0, 0, h, w,
0,
0, 0, # XXXX?
72<<16, 72<<16,
fmtinfo[0], fmtinfo[1],
fmtinfo[2], fmtinfo[3],
0, 0, 0)
## print 'Our pixmap, size %d:'%len(rv)
## dumppixmap(rv)
return Qd.RawBitMap(rv)
def dumppixmap(data):
baseAddr, \
rowBytes, \
t, l, b, r, \
pmVersion, \
packType, packSize, \
hRes, vRes, \
pixelType, pixelSize, \
cmpCount, cmpSize, \
planeBytes, pmTable, pmReserved \
= struct.unpack("lhhhhhhhlllhhhhlll", data)
print 'Base: 0x%x'%baseAddr
print 'rowBytes: %d (0x%x)'%(rowBytes&0x3fff, rowBytes)
print 'rect: %d, %d, %d, %d'%(t, l, b, r)
print 'pmVersion: 0x%x'%pmVersion
print 'packing: %d %d'%(packType, packSize)
print 'resolution: %f x %f'%(float(hRes)/0x10000, float(vRes)/0x10000)
print 'pixeltype: %d, size %d'%(pixelType, pixelSize)
print 'components: %d, size %d'%(cmpCount, cmpSize)
print 'planeBytes: %d (0x%x)'%(planeBytes, planeBytes)
print 'pmTable: 0x%x'%pmTable
print 'pmReserved: 0x%x'%pmReserved
for i in range(0, len(data), 16):
for j in range(16):
if i + j < len(data):
print '%02.2x'%ord(data[i+j]),
print