static void DecompressMaskImg(PixelNavigator dst, Stream src, int height)
{
while (height != 0)
{
var b = (byte)src.ReadByte();
if ((b & 0x80) != 0)
{
b &= 0x7F;
var c = (byte)src.ReadByte();
do
{
dst.Write(c);
dst.OffsetY(1);
--height;
} while (--b != 0 && height != 0);
}
else
{
do
{
dst.Write((byte)src.ReadByte());
dst.OffsetY(1);
--height;
} while (--b != 0 && height != 0);
}
}
}
protected void TownsDrawStripToScreen(VirtScreen vs, int dstX, int dstY, int srcX, int srcY, int width, int height)
{
if (width <= 0 || height <= 0)
{
return;
}
int m = _textSurfaceMultiplier;
var src1 = new PixelNavigator(vs.Surfaces[0]);
src1.GoTo(vs.XStart + srcX, srcY);
var src2 = new PixelNavigator(_textSurface);
src2.GoTo(srcX * m, (srcY + vs.TopLine - ScreenTop) * m);
var dst1 = new PixelNavigator(_townsScreen.GetLayerPixels(0, dstX, dstY).Value);
var dst2 = new PixelNavigator(_townsScreen.GetLayerPixels(1, dstX * m, dstY * m).Value);
int dp1 = _townsScreen.GetLayerPitch(0) - width * _townsScreen.GetLayerBpp(0);
int dp2 = _townsScreen.GetLayerPitch(1) - width * m * _townsScreen.GetLayerBpp(1);
int sp1 = vs.Pitch - (width * Surface.GetBytesPerPixel(vs.PixelFormat));
int sp2 = _textSurface.Pitch - width * m;
if (vs == MainVirtScreen || Game.GameId == GameId.Indy3 || Game.GameId == GameId.Zak)
{
for (int h = 0; h < height; ++h)
{
if (Surface.GetBytesPerPixel(_gfxManager.PixelFormat) == 2)
{
for (int w = 0; w < width; ++w)
{
dst1.WriteUInt16(_16BitPalette[src1.Read()]);
src1.OffsetX(1);
dst1.OffsetX(1);
}
src1.OffsetX(sp1 / src1.BytesByPixel);
dst1.OffsetX(dp1 / dst1.BytesByPixel);
}
else
{
for (int i = 0; i < width; i++)
{
dst1.Write(src1.Read());
dst1.OffsetX(1);
src1.OffsetX(1);
}
}
for (int sH = 0; sH < m; ++sH)
{
for (int i = 0; i < width * m; i++)
{
dst2.Write(src2.Read());
src2.OffsetX(1);
dst2.OffsetX(1);
}
src2.OffsetX(_textSurface.Width - (width * m));
dst2.OffsetX(dst2.Width - (width * m));
}
}
}
else
{
dst1 = new PixelNavigator(dst2);
for (int h = 0; h < height; ++h)
{
for (int w = 0; w < width; ++w)
{
var t = (src1.Read()) & 0x0f;
src1.OffsetX(1);
for (int i = 0; i < m; i++)
{
dst1.Write((byte)((t << 4) | t));
dst1.OffsetX(1);
}
}
dst1 = new PixelNavigator(dst2);
var src3 = new PixelNavigator(src2);
if (m == 2)
{
dst2.OffsetY(1);
src3.OffsetY(1);
}
for (int w = 0; w < width * m; ++w)
{
dst2.Write((byte)(src3.Read() | dst1.Read() & _townsLayer2Mask[src3.Read()]));
dst2.OffsetX(1);
dst1.Write((byte)(src2.Read() | dst1.Read() & _townsLayer2Mask[src2.Read()]));
src2.OffsetX(1);
src3.OffsetX(1);
dst1.OffsetX(1);
}
src1.OffsetX(sp1 / src1.BytesByPixel);
src2 = new PixelNavigator(src3);
src2.OffsetX(sp2 / src2.BytesByPixel);
dst1 = new PixelNavigator(dst2);
dst1.OffsetX(dp2 / dst1.BytesByPixel);
dst2.OffsetX(dp2 / dst2.BytesByPixel);
}
}
_townsScreen.AddDirtyRect(dstX * m, dstY * m, width * m, height * m);
}