public override BitmapDataBase ConvertTo(PixelFormat dstFormat)
{
if (dstFormat.Format == PixelFormat.Format)
{
return(Copy());
}
else if (dstFormat.IsIndexed)
{
IQuantization quantization = new WuAlphaColorQuantizer();
if (quantization.StartQuantization(pixels, Convert.ToInt32(Math.Pow(2, dstFormat.BitsPerPixel))))
{
var newData = quantization.QuantData;
if (dstFormat.Format == PixelFormatEnum.Indexed4Reverse)
{
var data2data = PixelConverters.GetDataToDataConverter(PixelFormats.Indexed4, PixelFormats.Indexed4Reverse);
newData = data2data(newData);
}
return(new BitmapDataIndexed(Width, Height, dstFormat, newData, quantization.QuantPalette));
}
else
{
throw new Exception($"BitmapData: convert to {dstFormat} error. Quantization don't work.");
}
}
else
{
var color2data = PixelConverters.GetColorToDataConverter(dstFormat);
if (color2data != null)
{
return(new BitmapData(Width, Height, dstFormat, color2data(pixels)));
}
else
{
throw new Exception($"BitmapData: convert to {dstFormat} error. ColorToDataConverter undefined.");
}
}
}
private unsafe void button1_Click(object sender, EventArgs e)
{
WuAlphaColorQuantizer quant = new WuAlphaColorQuantizer();
Bitmap img = (Bitmap)Image.FromFile("f:/temp/avsham-0.PNG");
Bitmap bmp = quant.Quantize(img, 256);
/* Bitmap img = (Bitmap)Image.FromFile("f:/temp/scannen.PNG");
* Bitmap bmp = new Bitmap(img.Width, img.Height, PixelFormat.Format8bppIndexed);
*
* BitmapData data = img.LockBits(
* Rectangle.FromLTRB(0, 0, img.Width, img.Height),
* ImageLockMode.ReadOnly, img.PixelFormat);
*
* BitmapData bmpdata = bmp.LockBits(
* Rectangle.FromLTRB(0, 0, bmp.Width, bmp.Height),
* ImageLockMode.WriteOnly, bmp.PixelFormat);
*
* uint[] res = quant.Quantize(
* (uint*)data.Scan0.ToPointer(),
* 256, img.Width, img.Height,
* (byte*)bmpdata.Scan0.ToPointer());
*
* ColorPalette pal = bmp.Palette;
* for (int i = 0; i < 256; i++)
* pal.Entries[i] = Color.FromArgb((int)res[i]);
* bmp.Palette = pal;
*
* img.UnlockBits(data);
* bmp.UnlockBits(bmpdata);*/
bmp.Save("f:/temp/avsham-0_quant.png");
img.Dispose();
bmp.Dispose();
}
public UVRT(Bitmap bitmap, PixelFormat pixelFormat, ImageType imageType, int mipLevels, byte[] palette = null)
{
if (!IsPow2(bitmap.Width) || !IsPow2(bitmap.Height))
{
throw new Exception("Width and height must be powers of two.");
}
if (imageType.IsIndexed())
{
byte indexBits = imageType.GetIndexBits();
byte[] indices;
Color[] colorPalette;
if (palette != null)
{
indices = new byte[bitmap.Width * bitmap.Height];
colorPalette = BitmapUtil.PaletteToColors(palette, pixelFormat);
for (int y = 0; y < bitmap.Height; y++)
{
for (int x = 0; x < bitmap.Width; x++)
{
int index = BitmapUtil.GetClosestColorIndex(bitmap.GetPixel(x, y), colorPalette, pixelFormat != PixelFormat.RGB565);
if (index == -1)
{
throw new Exception("Could not find a palette entry for pixel (" + x + ", " + y + ").");
}
indices[y * bitmap.Width + x] = (byte)(index & 0xFF);
}
}
}
else
{
BitmapData data = bitmap.LockBits(new Rectangle(0, 0, bitmap.Width, bitmap.Height),
ImageLockMode.ReadOnly, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
byte[] argbData = new byte[data.Stride * bitmap.Height];
Marshal.Copy(data.Scan0, argbData, 0, argbData.Length);
bitmap.UnlockBits(data);
WuAlphaColorQuantizer quantizer = new WuAlphaColorQuantizer();
ColorQuantizerResult result = quantizer.Quantize(argbData, 1 << indexBits);
indices = result.Bytes;
colorPalette = new Color[1 << indexBits];
for (int i = 0; i < result.Palette.Length / 4; i++)
{
colorPalette[i] = Color.FromArgb(result.Palette[i * 4 + 3], result.Palette[i * 4 + 2], result.Palette[i * 4 + 1], result.Palette[i * 4 + 0]);
}
}
byte[] converted = new byte[bitmap.Width * bitmap.Height * indexBits / 8];
for (int y = 0; y < bitmap.Height; y++)
{
for (int x = 0; x < bitmap.Width; x++)
{
int dataIndex = y * bitmap.Width + x;
int index = indices[dataIndex];
if (indexBits == 4)
{
int shift = (dataIndex & 1) * 4;
converted[dataIndex / 2] = (byte)((converted[dataIndex / 2] & ~(0xF << shift)) | ((index & 0xF) << shift));
}
else
{
converted[dataIndex] = (byte)(index & 0xFF);
}
}
}
this.Data = BitmapUtil.Swizzle(converted, (bitmap.Width * imageType.GetIndexBits()) / 8, bitmap.Height, (bitmap.Width * imageType.GetIndexBits()) / 8, bitmap.Height);
this.Palette = BitmapUtil.ColorsToPalette(colorPalette, pixelFormat);
}
else
{
if (pixelFormat == PixelFormat.DXT1A || pixelFormat == PixelFormat.DXT1A_EXT)
{
this.Data = BitmapUtil.CompressDxt1(bitmap.Width, bitmap.Height, pixelFormat == PixelFormat.DXT1A_EXT, bitmap);
}
else
{
int pixelSize = pixelFormat.GetSize();
byte[] converted = new byte[bitmap.Width * bitmap.Height * pixelSize];
for (int y = 0; y < bitmap.Height; y++)
{
for (int x = 0; x < bitmap.Width; x++)
{
int pixel = pixelFormat.FromColor(bitmap.GetPixel(x, y));
for (int j = 0; j < pixelSize; j++)
{
converted[(y * bitmap.Width + x) * pixelSize + j] = (byte)((pixel >> (j * 8)) & 0xFF);
}
}
}
this.Data = BitmapUtil.Swizzle(converted, bitmap.Width * pixelSize, bitmap.Height, bitmap.Width * pixelSize, bitmap.Height);
}
this.Palette = new byte[0];
}
this.Format = pixelFormat;
this.Type = imageType;
this.Width = (ushort)bitmap.Width;
this.Height = (ushort)bitmap.Height;
this.MipLevels = mipLevels;
}