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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/app.js
+88 -10
View File
@@ -1212,6 +1212,18 @@ const BW_OVERLAY_COLORS = {
stroke: [240 / 255, 173 / 255, 78 / 255, 0.70],
hard: [240 / 255, 173 / 255, 78 / 255, 0.38],
};
// Bandplan mode colours for WebGL rendering (normalised RGBA).
const BANDPLAN_MODE_COLORS = {
CW: [74 / 255, 144 / 255, 217 / 255, 0.55],
Phone: [76 / 255, 175 / 255, 80 / 255, 0.50],
Narrow: [217 / 255, 74 / 255, 122 / 255, 0.50],
FM: [1, 152 / 255, 0, 0.50],
All: [120 / 255, 120 / 255, 120 / 255, 0.40],
Beacon: [156 / 255, 39 / 255, 176 / 255, 0.50],
Satellite: [0, 188 / 255, 212 / 255, 0.50],
};
const BANDPLAN_STRIP_CSS_HEIGHT = 18; // CSS pixels
const BOOKMARK_MARKER_FALLBACK = "#66d9ef";
function overviewWfResetTextureCache() {
@@ -9873,6 +9885,38 @@ function drawSpectrum(data) {
spectrumGl.drawPoints(spectrumTmpMarkerPoints, Math.max(2, dpr * 1.6), cssColorToRgba(pal.waveformPeak));
}
// ── Bandplan WebGL strip (bottom of spectrum, above waterfall) ──
if (bandplanRegion !== "off" && bandplanData) {
const bpSegs = bandplanVisibleSegments(bandplanRegion, range.visLoHz, range.visHiHz);
if (bpSegs.length > 0) {
const bpH = Math.round(BANDPLAN_STRIP_CSS_HEIGHT * dpr);
const bpY = H - bpH;
// Dark backdrop so segments are readable over the spectrum fill.
spectrumGl.fillRect(0, bpY, W, bpH, [0.07, 0.09, 0.15, 0.82]);
// Thin separator line at top of bandplan strip.
spectrumGl.drawSegments([0, bpY, W, bpY],
[1, 1, 1, 0.08], Math.max(1, dpr * 0.5));
const bpVerts = [];
for (const seg of bpSegs) {
const l = Math.max(0, (seg.low_hz - range.visLoHz) / range.visSpanHz);
const r = Math.min(1, (seg.high_hz - range.visLoHz) / range.visSpanHz);
const xL = l * W;
const xW = Math.max(1, (r - l) * W);
const col = BANDPLAN_MODE_COLORS[seg.mode] || BANDPLAN_MODE_COLORS.All;
// Build two triangles per segment (batched into one draw call).
bpVerts.push(
xL, bpY, col[0], col[1], col[2], col[3],
xL + xW, bpY, col[0], col[1], col[2], col[3],
xL + xW, bpY + bpH, col[0], col[1], col[2], col[3],
xL, bpY, col[0], col[1], col[2], col[3],
xL + xW, bpY + bpH, col[0], col[1], col[2], col[3],
xL, bpY + bpH, col[0], col[1], col[2], col[3],
);
}
spectrumGl.drawTriangles(bpVerts);
}
}
// ── Crosshair lines ──
if (spectrumCrosshairX != null && spectrumCrosshairY != null) {
const cx = spectrumCrosshairX * dpr;
@@ -11242,6 +11286,10 @@ let bandplanCacheKey = "";
const bandplanStripEl = document.getElementById("spectrum-bandplan-strip");
const bandplanRegionSelect = document.getElementById("bandplan-region-select");
const bandplanLabelsCheck = document.getElementById("bandplan-labels-check");
// Original parent of bandplan strip (for reparenting between flow and overlay).
const _bandplanOrigParent = bandplanStripEl ? bandplanStripEl.parentNode : null;
const _bandplanOrigNext = bandplanStripEl ? bandplanStripEl.nextSibling : null;
let _bandplanInWebglParent = false;
(function loadBandplanJson() {
fetch("/bandplan.json")
@@ -11320,30 +11368,60 @@ function bandplanVisibleSegments(region, loHz, hiHz) {
return result;
}
function _hideBandplanStrip() {
if (!bandplanStripEl) return;
bandplanStripEl.classList.remove("bp-visible", "bp-webgl");
bandplanStripEl.innerHTML = "";
bandplanCacheKey = "";
if (_bandplanInWebglParent && _bandplanOrigParent) {
_bandplanOrigParent.insertBefore(bandplanStripEl, _bandplanOrigNext);
_bandplanInWebglParent = false;
}
}
function updateBandplanStrip(range) {
if (!bandplanStripEl) return;
if (!range || bandplanRegion === "off" || !bandplanData) {
if (bandplanStripEl.classList.contains("bp-visible")) {
bandplanStripEl.classList.remove("bp-visible");
bandplanStripEl.innerHTML = "";
bandplanCacheKey = "";
}
if (bandplanStripEl.classList.contains("bp-visible")) _hideBandplanStrip();
return;
}
const segments = bandplanVisibleSegments(bandplanRegion, range.visLoHz, range.visHiHz);
if (segments.length === 0) {
if (bandplanStripEl.classList.contains("bp-visible")) {
bandplanStripEl.classList.remove("bp-visible");
bandplanStripEl.innerHTML = "";
bandplanCacheKey = "";
}
if (bandplanStripEl.classList.contains("bp-visible")) _hideBandplanStrip();
return;
}
// When spectrum canvas is visible the coloured segments are rendered via
// WebGL inside drawSpectrum(). The DOM strip then only provides text labels
// overlaid at the bottom of the spectrum canvas. For non-SDR rigs (no
// spectrum) the strip falls back to the original DOM-coloured rendering.
const spectrumPanelEl = document.getElementById("spectrum-panel");
const webglMode = spectrumPanelEl && getComputedStyle(spectrumPanelEl).display !== "none";
bandplanStripEl.classList.add("bp-visible");
if (webglMode) {
bandplanStripEl.classList.add("bp-webgl");
// Reparent into .spectrum-wrap so absolute positioning is relative to the
// spectrum canvas rather than the outer flow container.
const specWrap = spectrumPanelEl.querySelector(".spectrum-wrap");
if (specWrap && !_bandplanInWebglParent) {
specWrap.appendChild(bandplanStripEl);
_bandplanInWebglParent = true;
bandplanCacheKey = ""; // force DOM rebuild after reparent
}
} else {
bandplanStripEl.classList.remove("bp-webgl");
// Move back to original document position for non-SDR flow layout.
if (_bandplanInWebglParent && _bandplanOrigParent) {
_bandplanOrigParent.insertBefore(bandplanStripEl, _bandplanOrigNext);
_bandplanInWebglParent = false;
bandplanCacheKey = "";
}
}
const newKey = bandplanRegion + ":" + (bandplanShowLabels ? "L" : "N") + ":" +
(webglMode ? "G:" : "D:") +
segments.map((s) => s.low_hz + "-" + s.high_hz).join(",");
const stripW = bandplanStripEl.clientWidth || 1;