public override void LoadAndWriteToStream(FileInfo inputFile, IAssetMeta meta, Stream outputStream)
{
ShaderAsset.ShaderType type = ShaderAsset.ShaderType.Frag;
if (inputFile.Name.ToLower().Contains("frag"))
{
type = ShaderAsset.ShaderType.Frag;
}
else if (inputFile.Name.ToLower().Contains("vert"))
{
type = ShaderAsset.ShaderType.Vertex;
}
else
{
type = meta.GetValue("shaderType", ShaderAsset.ShaderType.Frag);
}
using var ms = new MemoryStream();
using var fs = inputFile.OpenRead();
using var br = new BinaryWriter(outputStream, Encoding.UTF8, true);
fs.CopyTo(ms);
var data = ms.ToArray();
br.Write((int)type);
br.Write(data.Length);
br.Write(data);
}
public override unsafe void LoadAndWriteToStream(FileInfo inputFile, IAssetMeta meta, Stream outputStream)
{
bool generateMips = meta.GetValue("generateMipMaps", true);
CompressionFormat format = meta.GetValue("compressionFormat", CompressionFormat.BC3);
CompressionQuality quality = meta.GetValue("compressionQuality", CompressionQuality.Balanced);
using FileStream inputFs = File.OpenRead(inputFile.FullName);
using Image <Rgba32> imageFile = Image.Load <Rgba32>(inputFs);
bool hasTransparency = imageFile.GetPixelSpan().ToArray().Any(x => x.A < 255);
BcEncoder encoder = new BcEncoder();
encoder.OutputOptions.generateMipMaps = generateMips;
encoder.OutputOptions.format = format;
encoder.OutputOptions.fileFormat = OutputFileFormat.Ktx;
encoder.OutputOptions.quality = quality;
encoder.Encode(imageFile, outputStream);
/*
* compressor.Process(out DDSContainer dds);
* using BinaryWriter writer = new BinaryWriter(outputStream);
*
* using (dds) {
* KtxHeader header = new KtxHeader();
* byte[] id = new byte[] {0xAB, 0x4B, 0x54, 0x58, 0x20, 0x31, 0x31, 0xBB, 0x0D, 0x0A, 0x1A, 0x0A};
* Unsafe.Copy(header.Identifier, ref id[0]);
* header.Endianness = 0x04030201;
* if (compressed) {
* header.GlType = 0; //For compressed textures
* header.GlTypeSize = 1; //For compressed textures
* header.GlFormat = 0; //For compressed textures
* header.GlInternalFormat = hasTransparency
* ? GlInternalFormat.GL_COMPRESSED_SRGB8_ALPHA8_ETC2_EAC
* : GlInternalFormat.GL_COMPRESSED_SRGB8_ETC2;
* }
* else {
* header.GlType = 0x1401; //GL_UNSIGNED_BYTE
* header.GlTypeSize = 1; //1 byte
* header.GlFormat = 0x1908; //GL_RGBA
* }
*
*
* header.PixelWidth = (uint)dds.MipChains[0][0].Width;
* header.PixelHeight = dds.Dimension == TextureDimension.One ?
* 0 : (uint)dds.MipChains[0][0].Height;
* header.PixelDepth = dds.Dimension == TextureDimension.Three ?
* (uint)dds.MipChains[0][0].Depth : 0;
*
* header.NumberOfArrayElements = 0;
* header.NumberOfFaces = (uint)dds.MipChains.Count;
* header.NumberOfMipmapLevels = (uint) dds.MipChains[0].Count;
* header.BytesOfKeyValueData = 0;
*
* WriteStruct(writer, header);
* bool isCubemap = header.NumberOfFaces == 6 && header.NumberOfArrayElements == 0;
*
* for (int i = 0; i < header.NumberOfMipmapLevels; i++) {
* uint imageSize = (uint)dds.MipChains[0][i].SizeInBytes;
* writer.Write(imageSize);
*
* for (int j = 0; j < header.NumberOfFaces; j++) {
* var face = dds.MipChains[j][i];
* Span<byte> bytes = new Span<byte>(face.Data.ToPointer(), face.SizeInBytes);
* writer.Write(bytes);
* uint cubePadding = 0u;
* if (isCubemap)
* {
* cubePadding = 3 - ((imageSize + 3) % 4);
* }
*
* AddPadding(writer, cubePadding);
* }
*
* uint mipPaddingBytes = 3 - ((imageSize + 3) % 4);
* AddPadding(writer, mipPaddingBytes);
* }
* writer.Flush();
* }
*/
}