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commit no. 4

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This commit is contained in:
Erik Bročko
2026-03-25 19:47:26 +01:00
parent cc5241a1e5
commit 0c7ff40638
1 changed files with 13 additions and 15 deletions
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28
src/ui/Application.cpp
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@@ -649,14 +649,12 @@ void Application::renderWaterfallPanel() {
float availW = ImGui::GetContentRegionAvail().x; float availW = ImGui::GetContentRegionAvail().x;
float availH = ImGui::GetContentRegionAvail().y; float availH = ImGui::GetContentRegionAvail().y;
// Fixed history depth — independent of screen height, so resizing the // History depth must be >= panel height for 1:1 pixel mapping.
// splitter doesn't recreate the texture every frame. // Only recreate when bin count or needed height actually changes.
constexpr int kHistoryRows = 1024; int neededH = std::max(1024, static_cast<int>(availH) + 1);
// Only recreate when the bin count (FFT size) changes.
int binCount = std::max(1, analyzer_.spectrumSize()); int binCount = std::max(1, analyzer_.spectrumSize());
if (binCount != waterfall_.width() || waterfall_.height() != kHistoryRows) { if (binCount != waterfall_.width() || waterfall_.height() < neededH) {
waterfall_.resize(binCount, kHistoryRows); waterfall_.resize(binCount, neededH);
waterfall_.setColorMap(colorMap_); waterfall_.setColorMap(colorMap_);
} }
@@ -718,19 +716,19 @@ void Application::renderWaterfallPanel() {
// From newestRow, walk forward (increasing index mod h) for // From newestRow, walk forward (increasing index mod h) for
// screenRows steps to cover newest→oldest. // screenRows steps to cover newest→oldest.
// Use availH for the screen extent so there's no fractional pixel gap.
float pxPerRow = availH / static_cast<float>(screenRows);
if (newestRow + screenRows <= h) { if (newestRow + screenRows <= h) {
// No wrap: rows [newestRow .. newestRow+screenRows) drawSpan(newestRow, screenRows, screenY, availH);
drawSpan(newestRow, screenRows, screenY, static_cast<float>(screenRows));
} else { } else {
// Wraps: [newestRow .. h), then [0 .. remainder)
int firstCount = h - newestRow; int firstCount = h - newestRow;
float firstH = static_cast<float>(firstCount); float firstH = firstCount * pxPerRow;
drawSpan(newestRow, firstCount, screenY, firstH); drawSpan(newestRow, firstCount, screenY, firstH);
int secondCount = screenRows - firstCount; int secondCount = screenRows - firstCount;
float secondH = static_cast<float>(secondCount);
if (secondCount > 0) if (secondCount > 0)
drawSpan(0, secondCount, screenY + firstH, secondH); drawSpan(0, secondCount, screenY + firstH, availH - firstH);
} }
// ── Frequency axis labels ── // ── Frequency axis labels ──
@@ -1011,9 +1009,9 @@ void Application::updateAnalyzerSettings() {
// Re-init waterfall texture so the old image from a different FFT // Re-init waterfall texture so the old image from a different FFT
// size doesn't persist. // size doesn't persist.
constexpr int kHistoryRows = 1024; int reinitH = std::max(1024, waterfall_.height());
int binCount2 = std::max(1, analyzer_.spectrumSize()); int binCount2 = std::max(1, analyzer_.spectrumSize());
waterfall_.init(binCount2, kHistoryRows); waterfall_.init(binCount2, reinitH);
} }
} }