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<html>
<head>
<title>
BMP_IO - Read/write Microsoft BMP bitmap files
</title>
</head>
<body bgcolor="#EEEEEE" link="#CC0000" alink="#FF3300" vlink="#000055">
<h1 align = "center">
BMP_IO <br> Microsoft BMP bitmap files <br> Read and Write Utilities
</h1>
<hr>
<p>
<b>BMP_IO</b>
is a C++ library which
reads or writes the graphics information in
<a href = "../../data/bmp/bmp.html">
a Microsoft BMP file</a>.
</p>
<p>
A user program can employ these routines to read a BMP file
and extract and return the graphics information (RGB pixel arrays),
or to write internal RGB pixel arrays into a properly formatted BMP file.
The BMP file format is used for many of the icons seen
cluttering up the desktop of a Windows machine, for instance.
</p>
<p>
Of course, another interesting application is to read in a BMP file,
and write out the RGB information to a file in another format.
</p>
<p>
Since some of the data is multibyte, the format of the file can
depend on whether such data is written with the bytes in
"little-endian" or "big-endian" order. The program maintains a
variable called <b>BMP_BYTE_SWAP</b> which controls how the program
assumes the bytes are ordered. Setting this variable to
<b>true</b> show be the appropriate value for little-endian ordering,
while <b>false</b> is for big-endian. This variable can be read
by calling the function <b>bmp_byte_swap_get</b>, or set by calling
<b>bmp_byte_swap_set</b>.
</p>
<h3 align = "center">
Licensing:
</h3>
<p>
The computer code and data files described and made available on this web page
are distributed under
<a href = "../../txt/gnu_lgpl.txt">the GNU LGPL license.</a>
</p>
<h3 align = "center">
Languages:
</h3>
<p>
<b>BMP_IO</b> is available in
<a href = "../../cpp_src/bmp_io/bmp_io.html">a C++ version</a>.
</p>
<h3 align = "center">
Related Data and Programs:
</h3>
<p>
<a href = "../../data/bmp/bmp.html">
BMP</a>,
a data directory which
contains example BMP files.
</p>
<p>
<a href = "../../cpp_src/bmp_to_ppma/bmp_to_ppma.html">
BMP_TO_PPMA</a>,
a C++ program which
converts BMP files to ASCII PPM format.
</p>
<p>
<a href = "../../cpp_src/bmp_to_ppmb/bmp_to_ppmb.html">
BMP_TO_PPMB</a>,
a C++ program which
converts BMP files to binary PPM format.
</p>
<p>
<a href = "../../cpp_src/ppma_to_bmp/ppma_to_bmp.html">
PPMA_TO_BMP</a>,
a C++ program which
converts ASCII PPM files to BMP format.
</p>
<p>
<a href = "../../cpp_src/ppmb_to_bmp/ppmb_to_bmp.html">
PPMB_TO_BMP</a>,
a C++ program which
converts binary PPM files to BMP format.
</p>
<h3 align = "center">
Reference:
</h3>
<p>
<ol>
<li>
David Kay and John Levine,<br>
Graphics File Formats,<br>
Second Edition,<br>
McGraw Hill, 1995.
</li>
<li>
John Miano,<br>
Compressed Image File Formats,<br>
Addison Wesley, 1999.
</li>
<li>
Microsoft Corporation,<br>
Microsoft Windows Programmer's Reference,<br>
Volume 5; Messages, Structures, and Macros,<br>
Microsoft Press, 1993.
</li>
</ol>
</p>
<h3 align = "center">
Source Code:
</h3>
<p>
<ul>
<li>
<a href = "bmp_io.cpp">
bmp_io.cpp</a>, the source code;
</li>
<li>
<a href = "bmp_io.sh">
bmp_io.sh</a>,
commands to compile the source code;
</li>
<li>
<a href = "bmp_io.hpp">
bmp_io.hpp</a>, the include file;
</li>
</ul>
</p>
<h3 align = "center">
Examples and Tests:
</h3>
<p>
<ul>
<li>
<a href = "bmp_io_prb.cpp">
bmp_io_prb.cpp</a>, a calling program;
</li>
<li>
<a href = "bmp_io_prb.sh">
bmp_io_prb.sh</a>,
commands to compile, link and run the calling program;
</li>
<li>
<a href = "bmp_io_prb_output.txt">
bmp_io_prb_output.txt</a>,
output from a run of the calling program;
</li>
<li>
<a href = "../../data/bmp/bmp_08.bmp">
bmp_08.bmp</a>,
a monochrome (8 bits per pixel) BMP file created by the
calling program;
</li>
<li>
<a href = "../../data/bmp/bmp_24.bmp">bmp_24.bmp</a>,
a three color (24 bits per pixel) BMP file created by the
calling program;
</li>
</ul>
</p>
<h3 align = "center">
List of Routines:
</h3>
<p>
<ul>
<li>
<b>BMP_BYTE_SWAP_GET</b> returns the internal value of BMP_BYTE_SWAP.
</li>
<li>
<b>BMP_BYTE_SWAP_SET</b> sets the internal value of BMP_BYTE_SWAP.
</li>
<li>
<b>BMP_08_DATA_READ</b> reads 8 bit image data of the BMP file.
</li>
<li>
<b>BMP_08_DATA_WRITE</b> writes 8 bit image data to a BMP file.
</li>
<li>
<b>BMP_24_DATA_READ</b> reads 24 bit image data of the BMP file.
</li>
<li>
<b>BMP_24_DATA_WRITE</b> writes 24 bit image data to the BMP file.
</li>
<li>
<b>BMP_HEADER1_PRINT</b> prints the header information of a BMP file.
</li>
<li>
<b>BMP_HEADER1_READ</b> reads the header information of a BMP file.
</li>
<li>
<b>BMP_HEADER1_WRITE</b> writes the header information to a BMP file.
</li>
<li>
<b>BMP_HEADER2_PRINT</b> prints the bitmap header information of a BMP file.
</li>
<li>
<b>BMP_HEADER2_READ</b> reads the bitmap header information of a BMP file.
</li>
<li>
<b>BMP_HEADER2_WRITE</b> writes the bitmap header information to a BMP file.
</li>
<li>
<b>BMP_PALETTE_PRINT</b> prints the palette data in a BMP file.
</li>
<li>
<b>BMP_PALETTE_READ</b> reads the palette information of a BMP file.
</li>
<li>
<b>BMP_PALETTE_WRITE</b> writes the palette data to the BMP file.
</li>
<li>
<b>BMP_PRINT_TEST</b> tests the BMP print routines.
</li>
<li>
<b>BMP_READ</b> reads the header and data of a BMP file.
</li>
<li>
<b>BMP_READ_TEST</b> tests the BMP read routines.
</li>
<li>
<b>BMP_08_WRITE</b> writes the header and data for a monochrome BMP file.
</li>
<li>
<b>BMP_08_WRITE_TEST</b> tests the BMP write routines.
</li>
<li>
<b>BMP_24_WRITE</b> writes the header and data for a BMP file using three colors.
</li>
<li>
<b>BMP_24_WRITE_TEST</b> tests the BMP write routines.
</li>
<li>
<b>LONG_INT_READ</b> reads a long int from a file.
</li>
<li>
<b>LONG_INT_WRITE</b> writes a long int to a file.
</li>
<li>
<b>U_LONG_INT_READ</b> reads an unsigned long int from a file.
</li>
<li>
<b>U_LONG_INT_WRITE</b> writes an unsigned long int to a file.
</li>
<li>
<b>U_SHORT_INT_READ</b> reads an unsigned short int from a file.
</li>
<li>
<b>U_SHORT_INT_WRITE</b> writes an unsigned short int to a file.
</li>
</ul>
</p>
<p>
You can go up one level to <a href = "../cpp_src.html">
the C++ source codes</a>.
</p>
<hr>
<i>
Last revised on 09 December 2005.
</i>
<!-- John Burkardt -->
</body>
</html>