DZone Snippets: bitmap code

Compare two bitmap objects

mstampar (Miroslav Stampar) — Tue, 24 Apr 2007 22:34:24 GMT



        private bool PicsIdentical(Bitmap bmp1, Bitmap bmp2)

        {

            bool retVal = true;



            if (bmp1.Size != bmp2.Size)

                retVal = false;

            else

            {

                for (int x = 0; x < bmp1.Width; x++)

                {

                    for (int y = 0; y < bmp1.Height; y++)

                    {

                        if (bmp1.GetPixel(x, y) != bmp2.GetPixel(x, y))

                        {

                            retVal = false;

                            break;

                        }

                    }

                }

            }

            return retVal;

        }

Counting number of bitmaps in an mbm file

korakot (Korakot Chaovavanich) — Mon, 13 Feb 2006 22:32:04 GMT

I continue my hacking on symbian mbm(multi-bitmap) format.



# a helping function

from struct import unpack

def readL(f, pos=None):

    if pos is not None:

        f.seek(pos)

    return unpack('L', f.read(4))[0]



# the real counting function

def mbm_count(mbm_file):

    f = open(mbm_file, 'rb')

    mbm_type = readL(f)

    if mbm_type == 0x10000041:  # mbm on ROM (Z:)

        return readL(f) 

    elif mbm_type == 0x10000037L:  # mbm on file (normal)

        return readL(f, readL(f, 16)) # read at trailer

    else:       # what type is it?

        return None

For example (you may try this on your phone)



>>> mbm_count('z:\\system\\data\\avkon.mbm')

503L

>>> mbm_count('E:\\system\\apps\\FExplorer\\FExplorer.mbm')

19L

>>>

Using Icon as Image

korakot (Korakot Chaovavanich) — Sun, 03 Jul 2005 02:02:10 GMT

Pys60 1.1.3 have 2 differnt classes for graphics data.
Icon class represents icon (typically from .mbm file)
which can be put in ListBox for selection.
Image class represents a bigger image which can be
drawn upon. These 2 classes can't convert to/from
each other.

So, I create a library that read .mbm file and draw
an Image from the data there. So, you can make
an icon into an image (now only 1-bit icons).
the module can be downloaded from here
http://larndham.net/service/pys60/icon_image.py



from appuifw import *

import icon_image, e32



app.body = c = Canvas()

# choose a bitmap from plenty inside mbm (multi-bitmap)

icon = icon_image('z:\\system\\data\\avkon.mbm', 28) 

c.blit(icon)



e32.ao_sleep(10)  # 10 sec to end program

Look here for more information.
http://discussion.forum.nokia.com/forum/showthread.php?s=&threadid=63608