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New vertical gridline divisions based on @heckflosse's insight. And a minor correction from 265 to 255

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Thanatomanic
2018-07-07 07:51:41 +02:00
parent cebded3a2d
commit 531868b01a
1 changed files with 4 additions and 4 deletions
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8
rtgui/histogrampanel.cc
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@@ -889,7 +889,7 @@ void HistogramArea::updateBackBuffer ()
int nrOfVGridPartitions = (int)rtengine::min (16.0, pow (2.0, floor ((w - 100) / 250) + 2));
if (options.histogramDrawMode == 2) {
nrOfVGridPartitions = 9; // always show 9 stops in log-log mode (lines at 1,2,4,8,16,32,64,128)
nrOfVGridPartitions = 8; // always show 8 stops in log-log mode (lines at 1,3,7,15,31,63,127)
}
// draw vertical gridlines
@@ -900,9 +900,9 @@ void HistogramArea::updateBackBuffer ()
cr->stroke ();
}
} else {
for (int i = 0; i < nrOfVGridPartitions; i++) {
cr->move_to (scalingFunctionLog (256, pow(2.0,i)) * w / 256 + 0.5, 1.5);
cr->line_to (scalingFunctionLog (256, pow(2.0,i)) * w / 256 + 0.5, h - 2);
for (int i = 1; i < nrOfVGridPartitions; i++) {
cr->move_to (scalingFunctionLog (255, pow(2.0,i) - 1) * w / 255 + 0.5, 1.5);
cr->line_to (scalingFunctionLog (255, pow(2.0,i) - 1) * w / 255 + 0.5, h - 2);
cr->stroke ();
}
}