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[feat](trx-frontend-http): render bandplan strip via WebGL on spectrum canvas

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Move bandplan segment rendering from DOM elements to WebGL, drawing
coloured rectangles at the bottom of the spectrum canvas (above the
waterfall). All segments are batched into a single drawTriangles() call
for efficiency. The DOM strip is reparented into .spectrum-wrap and
restyled as a transparent text-label overlay (bp-webgl class). Non-SDR
rigs without a spectrum canvas retain the original DOM-coloured fallback.

https://claude.ai/code/session_01XTizHhXbXSAPQVAf1j9CSF
Signed-off-by: Claude <noreply@anthropic.com>
This commit is contained in:
Claude
2026-03-29 22:12:02 +00:00
committed by Stan Grams
parent 9abd2b7748
commit 3a2733850c
2 changed files with 114 additions and 10 deletions
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src/trx-client/trx-frontend/trx-frontend-http/assets/web/style.css
+26
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@@ -3300,6 +3300,32 @@ button:focus-visible, input:focus-visible, select:focus-visible {
z-index: 1;
}
/* ── WebGL overlay mode ── When the spectrum canvas is visible the coloured
segments are rendered via WebGL. The DOM strip repositions itself as a
transparent label overlay at the bottom of the spectrum canvas. */
#spectrum-bandplan-strip.bp-webgl {
position: absolute;
top: calc(var(--spectrum-plot-height) - 18px);
left: 0;
right: 0;
background: transparent;
border-bottom: none;
z-index: 6;
pointer-events: none;
}
#spectrum-bandplan-strip.bp-webgl .bp-segment {
background: transparent !important;
border-right-color: transparent;
}
#spectrum-bandplan-strip.bp-webgl .bp-segment-label {
color: rgba(255,255,255,0.92);
text-shadow: 0 0 3px rgba(0,0,0,0.8), 0 1px 2px rgba(0,0,0,0.6);
}
#spectrum-bandplan-strip.bp-webgl .bp-band-label {
color: rgba(255,255,255,0.65);
text-shadow: 0 0 3px rgba(0,0,0,0.8);
}
/* Legend in settings */
.bandplan-legend-grid {
display: flex;