/// <inheritdoc cref="Save"/>
public byte[] Save(IEnumerable <Color> colors, EncodingSaveContext saveContext)
{
// Get colors in unswizzled order, so the framework applies the swizzle correctly
var paddedWidth = GetPaddedWidth(saveContext.Size.Width);
var swizzle = GetSwizzle(saveContext.Size.Width);
var colorData = new byte[saveContext.Size.Width * saveContext.Size.Height * 4];
var index = 0;
foreach (var color in colors)
{
var targetPoint = swizzle.Get(index / 4);
var textureIndex = (targetPoint.Y * paddedWidth + targetPoint.X) * 4;
colorData[textureIndex] = color.R;
colorData[textureIndex + 1] = color.G;
colorData[textureIndex + 2] = color.B;
colorData[textureIndex + 3] = color.A;
index += 4;
}
// Initialize PVR Texture
var pvrTexture = PvrTexture.Create(colorData, (uint)saveContext.Size.Width, (uint)saveContext.Size.Height, 1, PixelFormat.RGBA8888, ChannelType.UnsignedByteNorm, ColorSpace.Linear);
// Transcode texture to PVRTC
pvrTexture.Transcode((PixelFormat)_format, ChannelType.UnsignedByteNorm, ColorSpace.Linear, CompressionQuality.PVRTCHigh);
return(pvrTexture.GetData());
}
/// <inheritdoc cref="Load"/>
public IEnumerable <Color> Load(byte[] tex, EncodingLoadContext loadContext)
{
// Initialize PVR Texture
var pvrTexture = PvrTexture.Create(tex, (uint)loadContext.Size.Width, (uint)loadContext.Size.Height, 1, (PixelFormat)_format, ChannelType.UnsignedByte, ColorSpace.Linear);
// Transcode texture to RGBA8888
var successful = pvrTexture.Transcode(PixelFormat.RGBA8888, ChannelType.UnsignedByteNorm, ColorSpace.Linear, CompressionQuality.PVRTCHigh);
if (!successful)
{
throw new InvalidOperationException("Transcoding with PVRTexLib was not successful.");
}
// Yield colors
// Get colors in unswizzled order, so the framework applies the swizzle correctly
var paddedWidth = GetPaddedWidth(loadContext.Size.Width);
var swizzle = GetSwizzle(loadContext.Size.Width);
var textureData = pvrTexture.GetData();
for (var y = 0; y < loadContext.Size.Height; y++)
{
for (var x = 0; x < loadContext.Size.Width; x++)
{
var sourcePoint = swizzle.Get(y * paddedWidth + x);
var textureIndex = (sourcePoint.Y * paddedWidth + sourcePoint.X) * 4;
yield return(Color.FromArgb(textureData[textureIndex + 3], textureData[textureIndex], textureData[textureIndex + 1], textureData[textureIndex + 2]));
}
}
}
/// <inheritdoc cref="Load"/>
public IEnumerable <Color> Load(byte[] tex, EncodingLoadContext loadContext)
{
// Initialize PVR Texture
var pvrTexture = PvrTexture.Create(tex, (uint)loadContext.Size.Width, (uint)loadContext.Size.Height, 1, (PixelFormat)_format, ChannelType.UnsignedByte, ColorSpace.Linear);
// Transcode texture to RGBA8888
var successful = pvrTexture.Transcode(PixelFormat.RGBA8888, ChannelType.UnsignedByteNorm, ColorSpace.Linear, CompressionQuality.PVRTCHigh);
if (!successful)
{
throw new InvalidOperationException("Transcoding with PVRTexLib was not successful.");
}
// Yield colors
var textureData = pvrTexture.GetData();
for (var i = 0L; i < textureData.Length; i += 4)
{
yield return(Color.FromArgb(textureData[i + 3], textureData[i], textureData[i + 1], textureData[i + 2]));
}
}
/// <inheritdoc cref="Save"/>
public byte[] Save(IEnumerable <Color> colors, EncodingSaveContext saveContext)
{
var colorData = new byte[saveContext.Size.Width * saveContext.Size.Height * 4];
var index = 0;
foreach (var color in colors)
{
colorData[index++] = color.R;
colorData[index++] = color.G;
colorData[index++] = color.B;
colorData[index++] = color.A;
}
// Initialize PVR Texture
var pvrTexture = PvrTexture.Create(colorData, (uint)saveContext.Size.Width, (uint)saveContext.Size.Height, 1, PixelFormat.RGBA8888, ChannelType.UnsignedByteNorm, ColorSpace.Linear);
// Transcode texture to PVRTC
pvrTexture.Transcode((PixelFormat)_format, ChannelType.UnsignedByteNorm, ColorSpace.Linear, CompressionQuality.PVRTCHigh);
return(pvrTexture.GetData());
}