/*static IEnumerable<Point> GetPointSequence(ImageSettings settings)
* {
* switch (settings.Format)
* {
* case Format.ATI1A:
* case Format.ATI1L:
* case Format.ATI2:
* case Format.ETC1:
* case Format.ETC1A4:
* case Format.DXT1:
* case Format.DXT3:
* case Format.DXT5:
* settings.TileSize = settings.TileSize + 3 & ~0x3;
* break;
* }
*
* int strideWidth = (settings.Width + 7) & ~7;
* int strideHeight = (settings.Height + 7) & ~7;
* if (settings.PadToPowerOf2)
* {
* strideWidth = 2 << (int)Math.Log(strideWidth - 1, 2);
* strideHeight = 2 << (int)Math.Log(strideHeight - 1, 2);
* }
*
* //stride TileSize
* var tileSize = 0;
* if (settings.ZOrder)
* tileSize = 2 << (int)(Math.Log(((settings.TileSize + 7) & ~7) - 1, 2));
* else
* tileSize = settings.TileSize;
* int powTileSize = (int)Math.Pow(tileSize, 2);
*
* int stride = strideWidth;
* switch (settings.Orientation)
* {
* case Orientation.Rotate90:
* case Orientation.Transpose:
* stride = strideHeight;
* break;
* }
*
* for (int i = 0; i < strideWidth * strideHeight; i++)
* {
* //in == order inside a tile
* //out == order of tiles themselves
* int x_out = 0, y_out = 0, x_in = 0, y_in = 0;
* if (settings.ZOrder)
* {
* x_out = (i / powTileSize % (stride / tileSize)) * tileSize;
* y_out = (i / powTileSize / (stride / tileSize)) * tileSize;
* x_in = ZOrderX(tileSize, i);
* y_in = ZOrderY(tileSize, i);
* }
* else
* {
* x_out = (i / powTileSize % (stride / tileSize)) * tileSize;
* y_out = (i / powTileSize / (stride / tileSize)) * tileSize;
*
* switch (settings.Format)
* {
* case Format.ATI1A:
* case Format.ATI1L:
* case Format.ATI2:
* case Format.ETC1:
* case Format.ETC1A4:
* case Format.DXT1:
* case Format.DXT3:
* case Format.DXT5:
* x_in = (i % 4 + i % powTileSize / 16 * 4) % tileSize;
* y_in = (i % 16 / 4 + i / (tileSize * 4) * 4) % tileSize;
* break;
* default:
* x_in = i % powTileSize % tileSize;
* y_in = i % powTileSize / tileSize;
* break;
* }
* }
*
* switch (settings.Orientation)
* {
* case Orientation.Default:
* yield return new Point(x_out + x_in, y_out + y_in);
* break;
* case Orientation.HorizontalFlip:
* yield return new Point(stride - 1 - (x_out + x_in), y_out + y_in);
* break;
* case Orientation.Rotate90:
* yield return new Point(y_out + y_in, stride - 1 - (x_out + x_in));
* break;
* case Orientation.Transpose:
* yield return new Point(y_out + y_in, x_out + x_in);
* break;
* case Orientation.TransposeTile:
* yield return new Point(x_out + y_in, y_out + x_in);
* break;
* default:
* throw new NotSupportedException($"Unknown orientation format {settings.Orientation}");
* }
* }
* }
* static int ZOrderX(int tileSize, int count)
* {
* var div = tileSize / 2;
* var x_in = count / div & div;
*
* while (div > 1)
* {
* div /= 2;
* x_in |= count / div & div;
* }
*
* return x_in;
* }
* static int ZOrderY(int tileSize, int count)
* {
* var div = tileSize;
* var div2 = tileSize / 2;
* var y_in = count / div & div2;
*
* while (div2 > 1)
* {
* div /= 2;
* div2 /= 2;
* y_in |= count / div & div2;
* }
*
* return y_in;
* }*/
/// <summary>
/// Loads the binary data with given settings as an image
/// </summary>
/// <param name="tex">
/// Bytearray containing the binary image data
/// </param>
/// <param name="settings">
/// The settings determining the final image output
/// </param>
public static Bitmap Load(byte[] tex, ImageSettings settings)
{
int width = settings.Width, height = settings.Height;
var points = GetPointSequence(settings);
var bmp = new Bitmap(width, height);
var data = bmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.WriteOnly, PixelFormat.Format32bppArgb);
unsafe
{
var ptr = (int *)data.Scan0;
foreach (var pair in points.Zip(settings.Format.Load(tex), Tuple.Create))
{
int x = pair.Item1.X, y = pair.Item1.Y;
if (0 <= x && x < width && 0 <= y && y < height)
{
var color = pair.Item2;
if (settings.PixelShader != null)
{
color = settings.PixelShader(color);
}
ptr[data.Stride * y / 4 + x] = color.ToArgb();
}
}
}
bmp.UnlockBits(data);
return(bmp);
}
/// <summary>
/// Gives back a sequence of points, modified by Swizzles if applied
/// </summary>
static IEnumerable <Point> GetPointSequence(ImageSettings settings)
{
int strideWidth = (settings.Swizzle != null) ? settings.Swizzle.Width : settings.Width;
int strideHeight = (settings.Swizzle != null) ? settings.Swizzle.Height : settings.Height;
for (int i = 0; i < strideWidth * strideHeight; i++)
{
var point = new Point(i % strideWidth, i / strideWidth);
if (settings.Swizzle != null)
{
point = settings.Swizzle.Get(point);
}
yield return(point);
}
}
static IEnumerable <Point> GetInnerTile(ImageSettings settings)
{
int tileSize = settings.TileSize;
int powTileSize = (int)Math.Pow(tileSize, 2);
for (int i = 0; i < powTileSize; i++)
{
if (settings.InnerSwizzle == null)
{
yield return(new Point(i % powTileSize % tileSize, i % powTileSize / tileSize));
}
else
{
yield return(settings.InnerSwizzle.InnerLoad(i, tileSize));
}
}
}
/// <summary>
/// Converts a given Bitmap, modified by given settings, in binary data
/// </summary>
/// <param name="bmp">The bitmap, which will be converted</param>
/// <param name="settings">Settings like Format, Dimensions and Swizzles</param>
/// <returns>byte[]</returns>
public static byte[] Save(Bitmap bmp, ImageSettings settings)
{
var points = GetPointSequence(settings);
var colors = new List <Color>();
foreach (var point in points)
{
int x = Clamp(point.X, 0, bmp.Width);
int y = Clamp(point.Y, 0, bmp.Height);
var color = bmp.GetPixel(x, y);
if (settings.PixelShader != null)
{
color = settings.PixelShader(color);
}
colors.Add(color);
}
return(settings.Format.Save(colors));
}
/// <summary>
/// Gives back a sequence of points, modified by Swizzles if applied
/// </summary>
static IEnumerable <Point> GetPointSequence(ImageSettings settings)
{
int tileSize = settings.TileSize;
int powTileSize = (int)Math.Pow(tileSize, 2);
int strideWidth = (settings.Width + (tileSize - 1)) & ~(tileSize - 1);
int strideHeight = (settings.Height + (tileSize - 1)) & ~(tileSize - 1);
if (settings.PadToPowerOf2)
{
strideWidth = 2 << (int)Math.Log(strideWidth - 1, 2);
strideHeight = 2 << (int)Math.Log(strideHeight - 1, 2);
}
int stride = strideWidth;
for (int i = 0; i < strideWidth * strideHeight; i += powTileSize)
{
var innerTile = GetInnerTile(settings);
foreach (var point in innerTile)
{
if (settings.OuterSwizzle == null)
{
var point2 = new Point(
((i / powTileSize % (stride / tileSize)) * tileSize) + point.X,
((i / powTileSize / (stride / tileSize)) * tileSize) + point.Y);
yield return(point2);
}
else
{
var point2 = settings.OuterSwizzle.OuterLoad(i, tileSize, strideWidth);
point2.X += point.X;
point2.Y += point.Y;
yield return(point2);
}
}
}
}
