daniel
71a3b26a47
Docked SWELL window toggled by a new action, drawing the current bank as per-sample min/max thumbnails (PCM_source + peaks) with an in-memory cache. Pure grid-layout/cache-key math in bank_grid (tested). Renames peaks::Sample -> AudioSample to avoid colliding with bank_model::Sample.
66 lines
2.3 KiB
C++
66 lines
2.3 KiB
C++
// bank_grid — pure implementation. See bank_grid.h. NO REAPER / SWELL / vendor.
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#include "bank_grid.h"
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namespace reasampler {
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int columnsForWidth(int panelWidth, const GridSpec& spec) {
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// Layout: [gap][cell][gap][cell]...[cell][gap]. n cells occupy
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// gap + n*(cellWidth + gap). Solve for the largest n that fits panelWidth,
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// clamped to at least 1 so a too-narrow panel still shows a (clipped) column.
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const int cell = spec.cellWidth + spec.gap;
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if (cell <= 0) return 1; // degenerate spec — one column, avoid divide-by-zero
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const int usable = panelWidth - spec.gap;
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if (usable < spec.cellWidth) return 1;
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const int cols = usable / cell;
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return cols < 1 ? 1 : cols;
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}
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std::vector<CellRect> computeCellRects(int itemCount,
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int panelWidth,
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const GridSpec& spec) {
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std::vector<CellRect> rects;
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if (itemCount <= 0) return rects;
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const int cols = columnsForWidth(panelWidth, spec);
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rects.reserve(static_cast<std::size_t>(itemCount));
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for (int i = 0; i < itemCount; ++i) {
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const int col = i % cols;
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const int row = i / cols;
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CellRect r;
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r.x = spec.gap + col * (spec.cellWidth + spec.gap);
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r.y = spec.gap + row * (spec.cellHeight + spec.gap);
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r.width = spec.cellWidth;
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r.height = spec.cellHeight;
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rects.push_back(r);
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}
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return rects;
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}
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int contentHeight(int itemCount, int panelWidth, const GridSpec& spec) {
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if (itemCount <= 0) return 0;
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const int cols = columnsForWidth(panelWidth, spec);
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// Ceil-divide item count by columns to get the row count (partial last row
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// still occupies a full row of height).
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const int rows = (itemCount + cols - 1) / cols;
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return spec.gap + rows * (spec.cellHeight + spec.gap);
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}
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std::string thumbnailKeyString(const ThumbnailKey& key) {
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// Length-prefix the sampleId so a delimiter byte inside an id cannot forge a
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// collision with a different (id, width, generation) triple.
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std::string s;
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s.reserve(key.sampleId.size() + 32);
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s += std::to_string(key.sampleId.size());
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s += ':';
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s += key.sampleId;
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s += '|';
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s += std::to_string(key.width);
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s += '|';
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s += std::to_string(key.generation);
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return s;
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}
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} // namespace reasampler
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