/// <summary>
/// Loads the texture.
/// </summary>
/// <param name="reader">The binary reader.</param>
/// <param name="readKeyValuePairs">The key value pairs.</param>
/// <returns>The KTX texture.</returns>
public static KTXTexture Load(BinaryReader reader, bool readKeyValuePairs)
{
KTXHeader header = ImageHelpers.ReadStruct <KTXHeader>(reader);
KTXKeyValuePair[] kvps = null;
if (readKeyValuePairs)
{
int keyValuePairBytesRead = 0;
List <KTXKeyValuePair> keyValuePairList = new List <KTXKeyValuePair>();
while (keyValuePairBytesRead < header.bytesOfKeyValueData)
{
int bytesRemaining = (int)(header.bytesOfKeyValueData - keyValuePairBytesRead);
// Read KeyValue
uint keyValueSize = reader.ReadUInt32();
byte[] keyValueArray = reader.ReadBytes((int)keyValueSize);
int paddingByteCount = (int)(3 - ((keyValueSize + 3) % 4));
reader.BaseStream.Seek(paddingByteCount, SeekOrigin.Current);
// Find the string terminator
int keySize;
for (keySize = 0; keySize < keyValueSize; keySize++)
{
if (keyValueArray[keySize] == 0)
{
break;
}
}
string key = Encoding.UTF8.GetString(keyValueArray, 0, keySize);
int valueStart = keySize + 1;
byte[] value = new byte[keyValueSize - valueStart];
Array.Copy(keyValueArray, valueStart, value, 0, value.Length);
KTXKeyValuePair kvp = new KTXKeyValuePair(key, value);
keyValuePairBytesRead += (int)keyValueSize + paddingByteCount + sizeof(uint);
keyValuePairList.Add(kvp);
}
kvps = keyValuePairList.ToArray();
}
else
{
reader.BaseStream.Seek(header.bytesOfKeyValueData, SeekOrigin.Current);
}
uint numberOfMipmapLevels = Math.Max(1, header.numberOfMipmapLevels);
uint numberOfArrayElements = Math.Max(1, header.numberOfArrayElements);
uint numberOfFaces = Math.Max(1, header.numberOfFaces);
uint baseWidth = Math.Max(1, header.pixelWidth);
uint baseHeight = Math.Max(1, header.pixelHeight);
uint baseDepth = Math.Max(1, header.pixelDepth);
KTXMipmapLevel[] images = new KTXMipmapLevel[numberOfMipmapLevels];
for (int mip = 0; mip < numberOfMipmapLevels; mip++)
{
uint mipPow = (uint)Math.Pow(2, mip);
uint mipWidth = Math.Max(1, baseWidth / mipPow);
uint mipHeight = Math.Max(1, baseHeight / mipPow);
uint mipDepth = Math.Max(1, baseDepth / mipPow);
uint imageSize = reader.ReadUInt32();
uint arrayElementSize = imageSize / numberOfArrayElements;
uint faceSize = (numberOfFaces > 1 && numberOfArrayElements == 1) ? arrayElementSize : arrayElementSize / numberOfFaces;
KTXArrayElement[] arrayElements = new KTXArrayElement[numberOfArrayElements];
for (int arrayIndex = 0; arrayIndex < numberOfArrayElements; arrayIndex++)
{
KTXFace[] faces = new KTXFace[numberOfFaces];
for (int face = 0; face < numberOfFaces; face++)
{
faces[face] = new KTXFace(reader.ReadBytes((int)faceSize));
}
arrayElements[arrayIndex] = new KTXArrayElement(faces);
}
images[mip] = new KTXMipmapLevel(mipWidth, mipHeight, mipDepth, imageSize, arrayElementSize, arrayElements);
uint mipPaddingBytes = 3 - ((imageSize + 3) % 4);
reader.BaseStream.Seek(mipPaddingBytes, SeekOrigin.Current);
}
return(new KTXTexture(header, kvps, images));
}
/// <summary>
/// Convert from KTX format to WaveEngine format.
/// </summary>
/// <param name="header">The KTX header.</param>
/// <returns>The WaveEngine format if this exists.</returns>
public static WaveEngine.Common.Graphics.PixelFormat FromOpenGLFormat(ref KTXHeader header)
{
if ((PixelFormat)header.glFormat == PixelFormat.Rgba &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgba32f)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32G32B32A32_Float);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgbaInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgba32ui)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32G32B32A32_UInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgbaInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgba32i)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32G32B32A32_SInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgbaInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgb32f)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32G32B32_Float);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgbaInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgb32ui)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32G32B32_UInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgbInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgb32i)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32G32B32_SInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Rgba &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgba16f)
{
return(WaveEngine.Common.Graphics.PixelFormat.R16G16B16A16_Float);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgbaInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgba16ui)
{
return(WaveEngine.Common.Graphics.PixelFormat.R16G16B16A16_UInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgbaInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgba16i)
{
return(WaveEngine.Common.Graphics.PixelFormat.R16G16B16A16_SInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Rg &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rg32f)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32G32_Float);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rg32ui)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32G32_UInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rg32i)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32G32_SInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Rgba &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgb10A2)
{
return(WaveEngine.Common.Graphics.PixelFormat.R10G10B10A2_UNorm);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Rgb &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.R11fG11fB10f)
{
return(WaveEngine.Common.Graphics.PixelFormat.R11G11B10_Float);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Rgba &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgba8)
{
return(WaveEngine.Common.Graphics.PixelFormat.R8G8B8A8_UNorm);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Rgba &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Srgb8Alpha8)
{
return(WaveEngine.Common.Graphics.PixelFormat.R8G8B8A8_UNorm_SRgb);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Rg &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rg16f)
{
return(WaveEngine.Common.Graphics.PixelFormat.R16G16_Float);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rg16ui)
{
return(WaveEngine.Common.Graphics.PixelFormat.R16G16_UInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RgInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rg16i)
{
return(WaveEngine.Common.Graphics.PixelFormat.R16G16_SInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.DepthComponent &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.DepthComponent32f)
{
return(WaveEngine.Common.Graphics.PixelFormat.D32_Float);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Red &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.R32f)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32_Float);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RedInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.R32ui)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32_UInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RedInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.R32i)
{
return(WaveEngine.Common.Graphics.PixelFormat.R32_SInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.DepthStencil &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Depth24Stencil8)
{
return(WaveEngine.Common.Graphics.PixelFormat.D24_UNorm_S8_UInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Red &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.R16f)
{
return(WaveEngine.Common.Graphics.PixelFormat.R16_Float);
}
else if ((PixelFormat)header.glFormat == PixelFormat.DepthComponent &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.DepthComponent16)
{
return(WaveEngine.Common.Graphics.PixelFormat.D16_UNorm);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RedInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.R16ui)
{
return(WaveEngine.Common.Graphics.PixelFormat.R16_UInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.RedInteger &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.R16i)
{
return(WaveEngine.Common.Graphics.PixelFormat.R16_SInt);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Luminance &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Luminance)
{
return(WaveEngine.Common.Graphics.PixelFormat.R8_UNorm);
}
else if ((PixelFormat)header.glFormat == PixelFormat.LuminanceAlpha &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.LuminanceAlpha)
{
return(WaveEngine.Common.Graphics.PixelFormat.R8G8_UNorm);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Alpha &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Alpha)
{
return(WaveEngine.Common.Graphics.PixelFormat.A8_UNorm);
}
else if (header.glFormat == 0 &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.CompressedRgbS3tcDxt1Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.BC1_UNorm_SRgb);
}
else if (header.glFormat == 0 &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.CompressedRgbaS3tcDxt1Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.BC1_UNorm);
}
else if (header.glFormat == 0 &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.CompressedSrgbAlphaS3tcDxt1Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.BC1_UNorm_SRgb);
}
else if (header.glFormat == 0 &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.CompressedRgbaS3tcDxt3Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.BC2_UNorm);
}
else if (header.glFormat == 0 &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.CompressedSrgbAlphaS3tcDxt3Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.BC2_UNorm_SRgb);
}
else if (header.glFormat == 0 &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.CompressedRgbaS3tcDxt5Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.BC3_UNorm);
}
else if (header.glFormat == 0 &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.CompressedSrgbAlphaS3tcDxt5Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.BC3_UNorm_SRgb);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Bgra &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Rgba)
{
return(WaveEngine.Common.Graphics.PixelFormat.B8G8R8A8_UNorm);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Bgra &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.Srgb8Alpha8)
{
return(WaveEngine.Common.Graphics.PixelFormat.B8G8R8A8_UNorm_SRgb);
}
else if ((PixelFormat)header.glFormat == PixelFormat.Red &&
(PixelInternalFormat)header.glInternalFormat == PixelInternalFormat.R16ui)
{
return(WaveEngine.Common.Graphics.PixelFormat.R16_UNorm);
}
else if (header.glFormat == 0 &&
header.glInternalFormat == 36196)
{
return(WaveEngine.Common.Graphics.PixelFormat.ETC1_RGB8);
}
else if (header.glFormat == 0 &&
(CompressedInternalFormat)header.glInternalFormat == CompressedInternalFormat.Etc1Rgb8Oes)
{
return(WaveEngine.Common.Graphics.PixelFormat.ETC2_RGBA);
}
else if (header.glFormat == 0 &&
(CompressedInternalFormat)header.glInternalFormat == CompressedInternalFormat.CompressedRgba8Etc2Eac)
{
return(WaveEngine.Common.Graphics.PixelFormat.ETC2_RGBA);
}
else if (header.glFormat == 0 &&
(CompressedInternalFormat)header.glInternalFormat == CompressedInternalFormat.CompressedSrgb8Alpha8Etc2Eac)
{
return(WaveEngine.Common.Graphics.PixelFormat.ETC2_RGBA_SRGB);
}
else if (header.glFormat == 0 &&
(ImgTextureCompressionPvrtc)header.glInternalFormat == ImgTextureCompressionPvrtc.CompressedRgbPvrtc2Bppv1Img)
{
return(WaveEngine.Common.Graphics.PixelFormat.PVRTC_2BPP_RGB);
}
else if (header.glFormat == 0 &&
(ImgTextureCompressionPvrtc)header.glInternalFormat == ImgTextureCompressionPvrtc.CompressedRgbPvrtc4Bppv1Img)
{
return(WaveEngine.Common.Graphics.PixelFormat.PVRTC_4BPP_RGB);
}
else if (header.glFormat == 0 &&
(ImgTextureCompressionPvrtc)header.glInternalFormat == ImgTextureCompressionPvrtc.CompressedRgbaPvrtc2Bppv1Img)
{
return(WaveEngine.Common.Graphics.PixelFormat.PVRTC_2BPP_RGBA);
}
else if (header.glFormat == 0 &&
(ImgTextureCompressionPvrtc)header.glInternalFormat == ImgTextureCompressionPvrtc.CompressedRgbaPvrtc4Bppv1Img)
{
return(WaveEngine.Common.Graphics.PixelFormat.PVRTC_4BPP_RGBA);
}
else if (header.glFormat == 0 &&
(ExtPvrtcSrgb)header.glInternalFormat == ExtPvrtcSrgb.CompressedSrgbPvrtc2Bppv1Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.PVRTC_2BPP_RGB_SRGB);
}
else if (header.glFormat == 0 &&
(ExtPvrtcSrgb)header.glInternalFormat == ExtPvrtcSrgb.CompressedSrgbPvrtc4Bppv1Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.PVRTC_4BPP_RGB_SRGB);
}
else if (header.glFormat == 0 &&
(ExtPvrtcSrgb)header.glInternalFormat == ExtPvrtcSrgb.CompressedSrgbAlphaPvrtc2Bppv1Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.PVRTC_2BPP_RGBA_SRGBA);
}
else if (header.glFormat == 0 &&
(ExtPvrtcSrgb)header.glInternalFormat == ExtPvrtcSrgb.CompressedSrgbAlphaPvrtc4Bppv1Ext)
{
return(WaveEngine.Common.Graphics.PixelFormat.PVRTC_4BPP_RGBA_SRGBA);
}
else
{
throw new NotSupportedException("Texture format not supported");
}
}
/// <summary>
/// Initializes a new instance of the <see cref="KTXTexture"/> class.
/// </summary>
/// <param name="header">The ktx header.</param>
/// <param name="keyValuePairs">The key value pairs.</param>
/// <param name="mipmaps">The mipmaps.</param>
public KTXTexture(KTXHeader header, KTXKeyValuePair[] keyValuePairs, KTXMipmapLevel[] mipmaps)
{
this.Header = header;
this.KeyValuePairs = keyValuePairs;
this.Mipmaps = mipmaps;
}
