encodeStripPlan function

Uint8List encodeStripPlan(StripPlan plan)

Serializes plan into one compact buffer (see the layout above).

Implementation

Uint8List encodeStripPlan(StripPlan plan) {
  final w = _PlanWriter();
  w.u8(_planFormatVersion);
  w.u32(plan.totalFlushPoints);
  w.u32(plan.deviceWidth);
  w.u32(plan.deviceHeight);
  final m = plan.pageToDevice;
  w.f64(m.a);
  w.f64(m.b);
  w.f64(m.c);
  w.f64(m.d);
  w.f64(m.e);
  w.f64(m.f);
  w.f64(plan.tolerance);
  w.u8(plan.slugGlyphs ? 1 : 0);
  w.u32(plan.slugQuadCount);
  w.u32(plan.slugFallbackOutlineRuns);
  w.u32(plan.slugFallbackOrdinals.length);
  for (final ordinal in plan.slugFallbackOrdinals) {
    w.u32(ordinal);
  }
  w.u32(plan.batches.length);
  for (final batch in plan.batches) {
    w.u32(batch.flushOrdinal);
    w.u32(batch.stripCount);
    w.u32(batch.atlasWidth);
    w.u32(batch.atlasHeight);
    w.raw(batch.atlasPixels);
    w.u32(batch.chunks.length);
    for (final chunk in batch.chunks) {
      final quads = chunk.positions.length ~/ 8;
      w.u32(quads);
      w.u32(chunk.alphaBase);
      w.rawView(chunk.positions.buffer, chunk.positions.offsetInBytes,
          chunk.positions.lengthInBytes);
      w.rawView(
          chunk.textureCoordinates.buffer,
          chunk.textureCoordinates.offsetInBytes,
          chunk.textureCoordinates.lengthInBytes);
      w.rawView(chunk.colors.buffer, chunk.colors.offsetInBytes,
          chunk.colors.lengthInBytes);
      w.rawView(chunk.indices.buffer, chunk.indices.offsetInBytes,
          chunk.indices.lengthInBytes);
    }
  }
  w.u32(plan.slugBatches.length);
  for (final batch in plan.slugBatches) {
    w.u32(batch.flushOrdinal);
    w.u32(batch.quadCount);
    w.u32(batch.atlasWidth);
    w.u32(batch.atlasHeight);
    w.f64(batch.cellHeight);
    w.raw(batch.atlasPixels);
    w.u32(batch.chunks.length);
    for (final chunk in batch.chunks) {
      final quads = chunk.positions.length ~/ 8;
      w.u32(quads);
      w.rawView(chunk.positions.buffer, chunk.positions.offsetInBytes,
          chunk.positions.lengthInBytes);
      w.rawView(
          chunk.textureCoordinates.buffer,
          chunk.textureCoordinates.offsetInBytes,
          chunk.textureCoordinates.lengthInBytes);
      w.rawView(chunk.colors.buffer, chunk.colors.offsetInBytes,
          chunk.colors.lengthInBytes);
      w.rawView(chunk.indices.buffer, chunk.indices.offsetInBytes,
          chunk.indices.lengthInBytes);
    }
  }
  return w.takeBytes();
}