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来自「data matrix 编码过程分析采用reed-solomn算法的应用」· 代码 · 共 19 行

This test program uses OpenGL (Mesa) to simulate camera input,
and writes decoded Data Matrix streams to STDOUT.

If you want to run the gltest binary directly you first have to
point LD_LIBRARY_PATH to the directory where libdmtx.so was
built.  You can do it like this:

   $ export LD_LIBRARY_PATH=$LD_LIBRARY_PATH${LD_LIBRARY_PATH:+:}../..

or simply run the script "run_gltest.sh", which does this for you
each time.

The program is somewhat boring if you don't know that you can
right-click to cycle through the test images.  To add your own
images, just overwrite any image in the libdmtx/test/test_images
directory with another 256x256 PNG file.  If you want to add
brand new images then you will have to update the gFilename[] and
gFileCount variables at the top of gltest.c to include them.