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William Cleveland
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 Posted: Wed Jun 25, 2003 4:09 am Post subject: Re: How to write a Bitmap file |
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A portable bitmap file (.pbm, usually) is a few header lines, followed
by a raw, two-dimensional array of bytes. Using system IO, you can
just write() your array of bytes with a single call, after you write
the header lines (probably with a sprintf call or the IO Streams
equivilant, followed by a single write() call for that buffer).
If you're talking about the Windows .bmp format, it's not really a
bitmap. It's complicated enough that you'll probably want to find
a library.
Bill
Yicheng Li wrote:
| Quote: | Hi, I've got an array of byte values (300 by 300) that I'm trying to
output as a bitmap file. I'm on the Windows 2000 platform, and I was
hoping for some kind of API or library where I could just create a
bitmap file. Is there anything like this, or am I pretty much going
to have to manually write the byte by byte.
Thanks in advance,
YL
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D. Rush
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| Posted: Wed Sep 29, 2004 10:44 pm Post subject: Re: How to write a Bitmap file |
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Here's some code that writes a bitmap. You can integrate the BitmapManager
class to build and save the bitmap pixel by pixel.
http://www.koders.com/cpp/fid7537D5C83DD56B396E00399B7636CFA11AB28FF4.aspx?s=2d+bmp+save
DR
"William Cleveland" <WCleveland (AT) Ameritech (DOT) Net> wrote
| Quote: | A portable bitmap file (.pbm, usually) is a few header lines, followed
by a raw, two-dimensional array of bytes. Using system IO, you can
just write() your array of bytes with a single call, after you write
the header lines (probably with a sprintf call or the IO Streams
equivilant, followed by a single write() call for that buffer).
If you're talking about the Windows .bmp format, it's not really a
bitmap. It's complicated enough that you'll probably want to find
a library.
Bill
Yicheng Li wrote:
Hi, I've got an array of byte values (300 by 300) that I'm trying to
output as a bitmap file. I'm on the Windows 2000 platform, and I was
hoping for some kind of API or library where I could just create a
bitmap file. Is there anything like this, or am I pretty much going
to have to manually write the byte by byte.
Thanks in advance,
YL
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