/// <summary> 建立使用指定像素格式的<see cref="WzCanvas"/>實體 </summary>
/// <param name="name"> <see cref="WzCanvas"/>的名稱 </param>
/// <param name="format"> <see cref="WzCanvas"/>的像素格式 </param>
public WzCanvas(string name, WzCanvasFormat format = WzCanvasFormat.B8G8R8A8) : base(name)
{
this.CanvasProperty = new WzProperty(null);
this.Unknow1_Byte = 0;
this.Width = 0;
this.Height = 0;
this.Format = format;
this.Scale = 0;
this.Unknow2_Int = 0;
this.DataSize = 0;
this.mCanvasOffset = 0;
this.mCanvasData = null;
this.mStream = null;
}
/// <summary> </summary>
public static unsafe byte[] Compress(WzCanvasFormat format, byte scale, int width, int height, Bitmap src)
{
PixelFormat pxFormat = (format == WzCanvasFormat.B5G6R5) ? PixelFormat.Format16bppRgb565 : PixelFormat.Format32bppArgb;
int cw = width >> scale, ch = height >> scale;
int cbSize = (format == WzCanvasFormat.B5G6R5 || format == WzCanvasFormat.B4G4R4A4) ? 2 : (format == WzCanvasFormat.B8G8R8A8) ? 4 : 1;
Rectangle rect = new Rectangle(0, 0, cw, ch);
Bitmap bmp = new Bitmap(src, cw, ch).Clone(rect, pxFormat);
BitmapData bmpData = bmp.LockBits(rect, ImageLockMode.WriteOnly, pxFormat);
byte[] compress = null;
switch (format)
{
case WzCanvasFormat.B4G4R4A4:
compress = new byte[cw * ch * cbSize];
fixed(byte *pDest = compress)
{
Pack4444(pDest, (byte *)bmpData.Scan0, cw, ch);
}
break;
case WzCanvasFormat.B5G6R5:
case WzCanvasFormat.B8G8R8A8:
compress = new byte[bmpData.Stride * bmpData.Height];
Marshal.Copy(bmpData.Scan0, compress, 0, compress.Length);
break;
case WzCanvasFormat.DDS_DXT3:
{
byte[] buffer = new byte[bmpData.Stride * bmpData.Height];
Marshal.Copy(bmpData.Scan0, buffer, 0, buffer.Length);
compress = dxt.compressImage(buffer, cw, ch, dxt.kDxt3);
}
break;
case WzCanvasFormat.DDS_DXT5:
{
byte[] buffer = new byte[bmpData.Stride * bmpData.Height];
Marshal.Copy(bmpData.Scan0, buffer, 0, buffer.Length);
compress = dxt.compressImage(buffer, cw, ch, dxt.kDxt5);
}
break;
}
bmp.UnlockBits(bmpData);
return(CanvasZlibTool.Compress(compress, compress.Length));
}
/// <summary> </summary>
public static unsafe Bitmap Decompress(WzCanvasFormat format, byte scale, int width, int height, byte[] datas)
{
int cbPixel = width * height;
PixelFormat pxFormat = (format == WzCanvasFormat.B5G6R5) ? PixelFormat.Format16bppRgb565 : PixelFormat.Format32bppArgb;
Bitmap bmp = new Bitmap(width, height, pxFormat);
BitmapData bmpData = bmp.LockBits(new Rectangle(0, 0, width, height), ImageLockMode.ReadOnly, pxFormat);
int decw = width >> scale, dech = height >> scale;
int cbSize = (format == WzCanvasFormat.B5G6R5 || format == WzCanvasFormat.B4G4R4A4) ? 2 : (format == WzCanvasFormat.B8G8R8A8) ? 4 : 1;
byte[] buffer = new byte[cbPixel * cbSize];
ZoomInPixels(buffer, CanvasZlibTool.Decompress(datas, decw * dech * cbSize), decw, dech, 1 << scale, cbSize);
switch (format)
{
case WzCanvasFormat.B4G4R4A4:
fixed(byte *pSrc = buffer)
{
Unpack4444((int *)bmpData.Scan0, (short *)pSrc, width, height);
}
break;
case WzCanvasFormat.B5G6R5:
case WzCanvasFormat.B8G8R8A8:
Marshal.Copy(buffer, 0, bmpData.Scan0, buffer.Length);
break;
case WzCanvasFormat.DDS_DXT3:
{
byte[] imagedata = dxt.decompressImage(buffer, width, height, dxt.kDxt3);
Marshal.Copy(imagedata, 0, bmpData.Scan0, imagedata.Length);
}
break;
case WzCanvasFormat.DDS_DXT5:
{
byte[] imagedata = dxt.decompressImage(buffer, width, height, dxt.kDxt5);
Marshal.Copy(imagedata, 0, bmpData.Scan0, imagedata.Length);
}
break;
}
bmp.UnlockBits(bmpData);
return(bmp);
}
