public static TgaInfo Load(
ImageBinReader reader, ReadState state, ArrayPool <byte>?bytePool = null)
{
var info = ParseHeader(reader, state);
reader.Skip(info.offset);
bytePool ??= ArrayPool <byte> .Shared;
int lineBufferLength = (state.Width * state.Components * state.Depth + 7) / 8;
byte[] lineBuffer = bytePool.Rent(lineBufferLength);
try
{
Span <byte> line = lineBuffer.AsSpan(0, lineBufferLength);
if (info.colormap_type == 0 && !info.is_RLE && state.Depth == 8)
{
for (int y = 0; y < state.Height; ++y)
{
reader.ReadBytes(line);
SwapComponentOrder(line, state.Components, state.Depth);
int row = info.inverted != 0 ? state.Height - y - 1 : y;
state.OutputPixelLine(AddressingMajor.Row, row, 0, line);
}
}
else
{
Memory <byte> paletteBuffer = default;
Span <byte> palette = default;
if (info.colormap_type != 0)
{
reader.Skip(info.palette_start);
paletteBuffer = new byte[info.palette_len * state.Components];
palette = paletteBuffer.Span;
if (state.Depth == 16)
{
for (int i = 0; i < palette.Length; i += state.Components)
{
ReadRgb16(reader, palette[i..]);