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Adjust waveform padding

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Remove padding from left and right sides and add padding to top and
bottom sides to improve visibility of extreme pixel values.
This commit is contained in:
Lawrence Lee
2020-07-24 17:03:10 -07:00
parent 4cbd622569
commit 5eb6961049
1 changed files with 5 additions and 5 deletions
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10
rtgui/histogrampanel.cc
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@@ -906,9 +906,9 @@ void HistogramArea::updateBackBuffer ()
// draw horizontal gridlines
if (options.histogramScopeType == 1) {
for (int i = 0; i <= nrOfVGridPartitions; i++) {
const double ypos = h - 1 - (pow(2.0,i) - 1) * (h - 1) / 255.0;
cr->move_to(padding, ypos);
cr->line_to(w - padding, ypos);
const double ypos = h - padding - (pow(2.0,i) - 1) * (h - 2 * padding - 1) / 255.0;
cr->move_to(0, ypos);
cr->line_to(w, ypos);
cr->stroke();
}
} else if (options.histogramDrawMode == 0) {
@@ -1133,8 +1133,8 @@ void HistogramArea::drawWaveform(Cairo::RefPtr<Cairo::Context> &cr, int w, int h
Cairo::RefPtr<Cairo::ImageSurface> surface = Cairo::ImageSurface::create(
buffer.get(), Cairo::FORMAT_ARGB32, waveform_width, 256, cairo_stride);
auto orig_matrix = cr->get_matrix();
cr->translate(padding, 0);
cr->scale(static_cast<double>(w - 2 * padding) / waveform_width, h / 256.0);
cr->translate(0, padding);
cr->scale(static_cast<double>(w) / waveform_width, (h - 2 * padding) / 256.0);
cr->set_source(surface, 0, 0);
cr->set_operator(Cairo::OPERATOR_OVER);
cr->paint();