Int2 Renderer::originalPointToNative(const Int2 &originalPoint) const
{
// From original point to letterbox point.
double originalXPercent = static_cast<double>(originalPoint.getX()) /
static_cast<double>(Renderer::ORIGINAL_WIDTH);
double originalYPercent = static_cast<double>(originalPoint.getY()) /
static_cast<double>(Renderer::ORIGINAL_HEIGHT);
const auto letterbox = this->getLetterboxDimensions();
Int2 letterboxPoint(
static_cast<double>(letterbox.w) * originalXPercent,
static_cast<double>(letterbox.h) * originalYPercent);
// Then from letterbox point to native point.
Int2 nativePoint(
letterboxPoint.getX() + letterbox.x,
letterboxPoint.getY() + letterbox.y);
return nativePoint;
}
std::unique_ptr<std::vector<char>> Compression::decompress(
const std::vector<char>& data,
const Schema& nativeSchema,
const Schema* const wantedSchema,
const std::size_t numPoints)
{
if (!wantedSchema || *wantedSchema == nativeSchema)
{
return decompress(data, nativeSchema, numPoints);
}
// Get decompressor in the native schema.
DecompressionStream decompressionStream(data);
pdal::LazPerfDecompressor<DecompressionStream> decompressor(
decompressionStream,
nativeSchema.pdalLayout().dimTypes());
// Allocate room for a single point in the native schema.
std::vector<char> nativePoint(nativeSchema.pointSize());
BinaryPointTable table(nativeSchema, nativePoint.data());
pdal::PointRef pointRef(table, 0);
// Get our result space, in the desired schema, ready.
std::unique_ptr<std::vector<char>> decompressed(
new std::vector<char>(numPoints * wantedSchema->pointSize(), 0));
char* pos(decompressed->data());
const char* end(pos + decompressed->size());
while (pos < end)
{
decompressor.decompress(nativePoint.data(), nativePoint.size());
for (const auto& d : wantedSchema->dims())
{
pointRef.getField(pos, d.id(), d.type());
pos += d.size();
}
}
return decompressed;
}