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Diffstat (limited to 'README.md')
| -rw-r--r-- | README.md | 11 |
1 files changed, 11 insertions, 0 deletions
@@ -76,6 +76,17 @@ and everything after it silently disappears, which looks like a layout or buffer-overflow bug and is neither. `set_clip()` clamps to the buffer bounds before converting. +### Verifying a frame without a screenshot + + MUX_DUMP=/tmp/frame.ppm ./colitur-mu # writes one frame, then exits + convert /tmp/frame.ppm /tmp/frame.png + +This reads back the off-screen PIXMAP, not the window. A window's contents +are not retained while it is obscured or sitting on an unfocused tag, so +`import`/`xwd` against one can return solid black while the program is +drawing perfectly -- which cost real time to work out once. A pixmap is +always there. + ### Which to use `colitur-x` renders; `colitur-mu` renders and lets you change the invocation. |