Hi guys,
I am trying to get BitmapBits from PyBITMAP object. As per the pywin32 doc,
i guess i managed to unpack the PyBITMAP structure to get the pointer to
bitmap bits. But when i use that pointer in PyGetMemory() i get
"ValueError: The value is not a valid address for reading"
Any clues please? How to get those bitmapbits as string from the pointer
value?
Please find my attached code below. I used print screen/Copy image before
running my code.
PS: I used win32ui API GetBitmapBits() successfully, but when i package my
application using py2exe it causes problems loading win32ui.pyd even after
adding MFC related DLLs. So now i am trying to avoid win32ui APIs in my
code (if possible) since i used win32ui only for BMP image handling
from win32api import *
from win32clipboard import *
from win32gui import *
import struct
def get_clipboard():
try:
OpenClipboard()
except:
print "open clipboard failed"
else:
if(IsClipboardFormatAvailable(CF_BITMAP)):
print "CF_BITMAP content"
hbitmap = GetClipboardDataHandle(CF_BITMAP)
bminfo = GetObject(hbitmap)
print "bmTy,bmW,bmH,bmWB,bmCP=",bminfo.bmType, bminfo.bmWidth,
bminfo.bmHeight, bminfo.bmWidthBytes, bminfo.bmPlanes
bminfo_list = []
bminfo_list.append(bminfo.bmType)
bminfo_list.append(bminfo.bmWidth)
bminfo_list.append(bminfo.bmHeight)
bminfo_list.append(bminfo.bmWidthBytes)
bminfo_list.append(bminfo.bmPlanes)
addr = id(bminfo)
fmt="llllll"
bminfo_buf = PyGetMemory(addr, struct.calcsize(fmt))
unpacked_list = struct.unpack_from(fmt, bminfo_buf)
print unpacked_list
for item in unpacked_list:
if item not in bminfo_list:
bits_addr = item
break
print 'bits_addr =',bits_addr
bpp = bminfo.bmWidthBytes/bminfo.bmWidth
tot_bytes = bminfo.bmWidth * bminfo.bmHeight * bpp
bits_str = PyGetMemory(bits_addr, tot_bytes)
print 'len of pystr =',len(bits_str)
else:
print "unsupported clipboard format"
finally:
CloseClipboard()
if __name__ == '__main__':
get_clipboard()_______________________________________________
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