private static byte[] From4bpp(this IImageRead image, byte[] channelOrder)
{
var size = image.Size;
var data = image.GetData();
var clut = image.GetClut();
var dstData = new byte[size.Width * size.Height * sizeof(uint)];
var srcIndex = 0;
var dstIndex = 0;
for (var y = 0; y < size.Height; y++)
{
for (var i = 0; i < size.Width / 2; i++)
{
var ch = data[srcIndex++];
var palIndex1 = (ch & 15);
var palIndex2 = (ch >> 4);
dstData[dstIndex++] = clut[palIndex1 * 4 + channelOrder[0]];
dstData[dstIndex++] = clut[palIndex1 * 4 + channelOrder[1]];
dstData[dstIndex++] = clut[palIndex1 * 4 + channelOrder[2]];
dstData[dstIndex++] = clut[palIndex1 * 4 + channelOrder[3]];
dstData[dstIndex++] = clut[palIndex2 * 4 + channelOrder[0]];
dstData[dstIndex++] = clut[palIndex2 * 4 + channelOrder[1]];
dstData[dstIndex++] = clut[palIndex2 * 4 + channelOrder[2]];
dstData[dstIndex++] = clut[palIndex2 * 4 + channelOrder[3]];
}
}
return(dstData);
}
private static byte[] GetDataResource4bpp(IImageRead image)
{
var size = image.Size;
var data = image.GetData();
var clut = image.GetClut();
var dstData = new byte[size.Width * size.Height * sizeof(uint)];
var srcIndex = 0;
var dstIndex = 0;
for (var y = 0; y < size.Height; y++)
{
for (var i = 0; i < size.Width / 2; i++)
{
var ch = data[srcIndex++];
var palIndex1 = (ch >> 4);
var palIndex2 = (ch & 15);
dstData[dstIndex++] = clut[palIndex1 * 4 + 2];
dstData[dstIndex++] = clut[palIndex1 * 4 + 1];
dstData[dstIndex++] = clut[palIndex1 * 4 + 0];
dstData[dstIndex++] = clut[palIndex1 * 4 + 3];
dstData[dstIndex++] = clut[palIndex2 * 4 + 2];
dstData[dstIndex++] = clut[palIndex2 * 4 + 1];
dstData[dstIndex++] = clut[palIndex2 * 4 + 0];
dstData[dstIndex++] = clut[palIndex2 * 4 + 3];
}
}
return(dstData);
}
public static byte[] ToBgra32(this IImageRead imageRead)
{
switch (imageRead.PixelFormat)
{
case PixelFormat.Indexed4:
return(ImageDataHelpers.FromIndexed4ToBgra(imageRead.GetData(), imageRead.GetClut()));
case PixelFormat.Indexed8:
return(ImageDataHelpers.FromIndexed8ToBgra(imageRead.GetData(), imageRead.GetClut()));
case PixelFormat.Rgba8888:
return(imageRead.GetData());
default:
throw new NotImplementedException($"The PixelFormat {imageRead.PixelFormat} cannot be converted to a Bgra32.");
}
}
public static byte[] AsRgba8888(this IImageRead image)
{
switch (image.PixelFormat)
{
case PixelFormat.Indexed4:
return(ImageDataHelpers.FromIndexed4ToBitmap32(
image.GetData(), image.GetClut(), Rgba));
case PixelFormat.Indexed8:
return(ImageDataHelpers.FromIndexed8ToBitmap32(
image.GetData(), image.GetClut(), Rgba));
case PixelFormat.Rgba8888:
return(ImageDataHelpers.FromBitmap32(image.GetData(), Bgra));
default:
throw new ArgumentException($"The pixel format {image.PixelFormat} is not supported.");
}
}
public static Imgd AsImgd(this IImageRead image, bool isSwizzled = false)
{
if (image is Imgd imgd)
{
return(imgd);
}
else
{
switch (image.PixelFormat)
{
case PixelFormat.Rgba8888:
case PixelFormat.Rgbx8888:
return(new Imgd(image.Size, image.PixelFormat, GetAsRGBA(image.GetData()), image.GetClut(), isSwizzled));
default:
return(new Imgd(image.Size, image.PixelFormat, image.GetData(), image.GetClut(), isSwizzled));
}
}
}
private static BitmapPalette GetPalette(IImageRead image)
{
var clut = image.GetClut();
int colorsCount = clut.Length / 4;
if (colorsCount == 0)
{
return(null);
}
var colors = new List <Color>(colorsCount);
for (var i = 0; i < colorsCount; i++)
{
colors.Add(GetColor(clut, i * 4));
}
return(new BitmapPalette(colors));
}
internal static Bitmap CreateBitmap(this IImageRead imageRead)
{
var drawingPixelFormat = imageRead.PixelFormat.GetDrawingPixelFormat();
Bitmap bitmap = new Bitmap(imageRead.Size.Width, imageRead.Size.Height, drawingPixelFormat);
var rect = new Rectangle(0, 0, bitmap.Width, bitmap.Height);
var bitmapData = bitmap.LockBits(rect, ImageLockMode.WriteOnly, drawingPixelFormat);
var srcData = imageRead.GetData();
var dstLength = Math.Min(srcData.Length, bitmapData.Stride * bitmapData.Height);
Marshal.Copy(srcData, 0, bitmapData.Scan0, dstLength);
bitmap.UnlockBits(bitmapData);
var isIndexed = imageRead.PixelFormat.IsIndexed();
if (isIndexed)
{
var palette = bitmap.Palette;
var clut = imageRead.GetClut();
var colorsCount = Math.Min(clut.Length / 4, palette.Entries.Length);
for (var i = 0; i < colorsCount; i++)
{
palette.Entries[i] = Color.FromArgb(
clut[i * 4 + 3],
clut[i * 4 + 0],
clut[i * 4 + 1],
clut[i * 4 + 2]);
}
bitmap.Palette = palette;
}
return(bitmap);
}
public static Imgd AsImgd(this IImageRead image, bool isSwizzled = false) => new Imgd(image.Size, image.PixelFormat, image.GetData(), image.GetClut(), isSwizzled);