diff ppm.h @ 1380:9a5352a2f57a

Implement horizontal border in Mode 4 and make a minor fix to advance_output_line to handle the later vcounter increment in that mode
author Michael Pavone <pavone@retrodev.com>
date Mon, 29 May 2017 22:19:33 -0700
parents 5f65a16c23ff
children da2e06c42d16
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