public static unsafe bool Load(IVideoProvider v, Stream s)
{
var bf = Bitmapfileheader.FromStream(s);
var bi = Bitmapinfoheader.FromStream(s);
if (bf.bfType != 0x4d42 ||
bf.bfOffBits != bf.bfSize + bi.biSize ||
bi.biPlanes != 1 ||
bi.biBitCount != 32 ||
bi.biCompression != BitmapCompressionMode.BI_RGB)
{
return(false);
}
int inW = bi.biWidth;
int inH = bi.biHeight;
byte[] src = new byte[inW * inH * 4];
s.Read(src, 0, src.Length);
if (v is LoadedBMP)
{
var l = v as LoadedBMP;
l.BufferWidth = inW;
l.BufferHeight = inH;
l.VideoBuffer = new int[inW * inH];
}
int[] dst = v.GetVideoBuffer();
fixed(byte *srcp = src)
fixed(int *dstp = dst)
{
using (new SimpleTime("Blit"))
{
Blit(new BMP
{
Data = (int *)srcp,
Width = inW,
Height = inH
},
new BMP
{
Data = dstp,
Width = v.BufferWidth,
Height = v.BufferHeight,
});
}
}
return(true);
}
public static unsafe void Save(IVideoProvider v, Stream s, int w, int h)
{
var bf = new Bitmapfileheader();
var bi = new Bitmapinfoheader();
bf.bfType = 0x4d42;
bf.bfOffBits = bf.bfSize + bi.biSize;
bi.biPlanes = 1;
bi.biBitCount = 32; // xrgb
bi.biCompression = BitmapCompressionMode.BI_RGB;
bi.biSizeImage = (uint)(w * h * 4);
bi.biWidth = w;
bi.biHeight = h;
byte[] bfb = GetBytes(bf);
byte[] bib = GetBytes(bi);
s.Write(bfb, 0, bfb.Length);
s.Write(bib, 0, bib.Length);
int[] src = v.GetVideoBuffer();
byte[] dst = new byte[4 * w * h];
fixed(int *srcp = src)
fixed(byte *dstp = dst)
{
using (new SimpleTime("Blit"))
{
Blit(new BMP
{
Data = srcp,
Width = v.BufferWidth,
Height = v.BufferHeight
},
new BMP
{
Data = (int *)dstp,
Width = w,
Height = h,
});
}
}
s.Write(dst, 0, dst.Length);
}
