// https://github.com/libretro/common-shaders/blob/master/xbr/super-xbr-6p-small-details.cgp
// https://github.com/libretro/common-shaders/blob/master/xbr/shaders/super-xbr/super-xbr-small-details-pass0.cg
// https://github.com/libretro/common-shaders/blob/master/xbr/shaders/super-xbr/super-xbr-small-details-pass1.cg
// https://github.com/libretro/common-shaders/blob/master/xbr/shaders/super-xbr/super-xbr-small-details-pass2.cg
private void Scale(ReadOnlySpan <Color16> source, Vector2I sourceSize, Span <Color16> target, Vector2I targetSize)
{
var source0 = Fixed16.ConvertToReal(source.Elements()).Cast <float, Float4>();
var target0 = SpanExt.Make <Float4>(source.Length);
var pass0 = new Passes.Pass0(Configuration, sourceSize, sourceSize);
pass0.Pass(source0, target0);
var target1 = SpanExt.Make <Float4>(target.Length);
var pass1 = new Passes.Pass1(Configuration, sourceSize, targetSize);
pass1.Pass(source0, target0, target1);
var target2 = SpanExt.Make <Float4>(target.Length);
var pass2 = new Passes.Pass2(Configuration, targetSize, targetSize);
pass2.Pass(target1, target2);
for (int i = 0; i < target2.Length; ++i)
{
target[i].R = target2[i].R.ScalarToValue16();
target[i].G = target2[i].G.ScalarToValue16();
target[i].B = target2[i].B.ScalarToValue16();
target[i].A = target2[i].A.ScalarToValue16();
}
}
internal static Span <Color8> Extract(ReadOnlySpan <Color8> data, Bounds textureBounds, Bounds spriteBounds, int stride, int block, out Vector2I newExtent)
{
//if ((bounds.Width % block) != 0 || (bounds.Height % block) != 0) {
// throw new ArgumentOutOfRangeException($"Bounds {bounds} are not multiples of block {block}");
//}
if (block == 1)
{
return(Extract(data, textureBounds, spriteBounds, stride, out newExtent));
}
var bounds = new Bounds(
spriteBounds.Offset,
(spriteBounds.Extent / block).Max((1, 1))
);
var result = SpanExt.Make <Color8>(bounds.Area);
int startOffset = (bounds.Offset.Y * stride) + bounds.Offset.X;
int outOffset = 0;
for (int y = 0; y < bounds.Extent.Height; ++y)
{
int offset = startOffset + ((y * block) * stride);
for (int x = 0; x < bounds.Extent.Width; ++x)
{
result[outOffset++] = data[offset + (x * block)];
}
}
newExtent = bounds.Extent;
return(result);
}
private static Span <Color16> Apply(
Config?config,
uint scaleMultiplier,
ReadOnlySpan <Color16> sourceData,
Vector2I sourceSize,
Span <Color16> targetData,
Vector2I targetSize
)
{
if (config is null)
{
throw new ArgumentNullException(nameof(config));
}
if (sourceSize.X * sourceSize.Y > sourceData.Length)
{
throw new ArgumentOutOfRangeException(nameof(sourceData));
}
var targetSizeCalculated = sourceSize * scaleMultiplier;
if (targetSize != targetSizeCalculated)
{
throw new ArgumentOutOfRangeException(nameof(targetSize));
}
if (targetData.IsEmpty)
{
targetData = SpanExt.Make <Color16>(targetSize.Area);
}
else
{
if (targetSize.Area > targetData.Length)
{
throw new ArgumentOutOfRangeException(nameof(targetData));
}
}
var scalerInstance = new Scaler(
configuration: in config,
scaleMultiplier: scaleMultiplier,
sourceSize: sourceSize,
targetSize: targetSize
);
scalerInstance.Scale(sourceData, targetData);
return(targetData);
}
internal Span <Color16> Execute(ReadOnlySpan <Color16> data)
{
var buffer1 = SpanExt.Make <Color16>(data.Length);
var buffer2 = SpanExt.Make <Color16>(data.Length);
DeposterizeH(data, buffer1);
DeposterizeV(buffer1, buffer2);
//buffer1Data.CopyTo(buffer2Data);
for (int pass = 1; pass < Passes; ++pass)
{
DeposterizeH(buffer2, buffer1);
DeposterizeV(buffer1, buffer2);
//buffer1Data.CopyTo(buffer2Data);
}
return(buffer2);
}
internal static Span <Color8> Extract(ReadOnlySpan <Color8> data, Bounds textureBounds, Bounds inBounds, int stride, out Vector2I newExtent)
{
if (inBounds == textureBounds)
{
newExtent = inBounds.Extent;
return(data.ToSpanUnsafe());
}
else
{
var resultData = SpanExt.Make <Color8>(inBounds.Area);
int sourceOffset = (textureBounds.Width * inBounds.Top) + inBounds.Left;
int destOffset = 0;
for (int y = 0; y < inBounds.Height; ++y)
{
data.Slice(sourceOffset, inBounds.Width).CopyTo(resultData.Slice(destOffset, inBounds.Width));
destOffset += inBounds.Width;
sourceOffset += textureBounds.Width;
}
newExtent = inBounds.Extent;
return(resultData);
}
}
internal static unsafe Span <Color8> ReadFile(Uri path, out Vector2I size)
{
Console.WriteLine($"Reading {path}");
using var rawImage = Image.FromFile(path.LocalPath);
using var image = new Bitmap(rawImage.Width, rawImage.Height, PixelFormat.Format32bppArgb);
using (Graphics g = Graphics.FromImage(image)) {
g.DrawImage(rawImage, 0, 0, rawImage.Width, rawImage.Height);
}
if (image is null)
{
throw new NullReferenceException(nameof(image));
}
var imageData = image.LockBits(new Rectangle(Point.Empty, image.Size), ImageLockMode.ReadOnly, image.PixelFormat);
var imageSpan = SpanExt.Make <Color8>(image.Width * image.Height);
var sourceSize = imageData.Height * imageData.Stride;
var sourceData = new ReadOnlySpan <byte>(imageData.Scan0.ToPointer(), sourceSize).Cast <Color8>();
int destOffset = 0;
int sourceOffset = 0;
for (int y = 0; y < imageData.Height; ++y)
{
sourceData.Slice(sourceOffset, imageData.Width).CopyTo(
imageSpan.Slice(destOffset, imageData.Width)
);
destOffset += imageData.Width;
sourceOffset += (imageData.Stride / sizeof(Color8));
}
image.UnlockBits(imageData);
size = image.Size;
return(imageSpan);
}
internal static Span <byte> Decode(ReadOnlySpan <byte> data, Vector2I size, SurfaceFormat format)
{
Vector2U uSize = size;
if (!IsBlockMultiple(uSize))
{
throw new ArgumentException($"{nameof(size)}: {uSize} not block multiple");
}
switch (format)
{
case SurfaceFormat.Dxt1: {
var blocks = data.Cast <ColorBlock>();
var outData = SpanExt.Make <byte>((int)uSize.Area);
var outDataPacked = outData.Cast <uint>();
var widthBlocks = uSize.Width >> 2;
uint blockIndex = 0;
foreach (var block in blocks)
{
var index = blockIndex++;
var xOffset = (index & widthBlocks - 1) << 2;
var yOffset = index / widthBlocks << 2;
for (uint y = 0; y < 4; ++y)
{
var yOffsetInternal = yOffset + y;
for (uint x = 0; x < 4; ++x)
{
var xOffsetInternal = xOffset + x;
var offset = yOffsetInternal * uSize.Width + xOffsetInternal;
outDataPacked[(int)offset] = block.GetColor((x, y)) | 0xFF000000U;
}
}
}
return(outData);
}
case SurfaceFormat.Dxt3: {
var blocks = data.Cast <ColorBlockDxt3>();
var outData = SpanExt.Make <byte>((int)uSize.Area * sizeof(uint));
var outDataPacked = outData.Cast <uint>();
var widthBlocks = uSize.Width >> 2;
uint blockIndex = 0;
foreach (var block in blocks)
{
var index = blockIndex++;
var xOffset = (index & widthBlocks - 1) << 2;
var yOffset = index / widthBlocks << 2;
for (uint y = 0; y < 4; ++y)
{
var yOffsetInternal = yOffset + y;
for (uint x = 0; x < 4; ++x)
{
var xOffsetInternal = xOffset + x;
var offset = yOffsetInternal * uSize.Width + xOffsetInternal;
outDataPacked[(int)offset] = block.GetColor((x, y));
}
}
}
return(outData);
}
default:
throw new ArgumentOutOfRangeException(nameof(format));
}
}