private static void PutPixel(FastBitmap bmp, int index, int color, BluRaySupPalette palette)
{
int x = index % bmp.Width;
int y = index / bmp.Width;
if (x < bmp.Width && y < bmp.Height)
{
bmp.SetPixel(x, y, Color.FromArgb(palette.GetArgb(color)));
}
}
private static void PutPixel(FastBitmap bmp, int index, int color, BluRaySupPalette palette)
{
int x = index % bmp.Width;
int y = index / bmp.Width;
if (x < bmp.Width && y < bmp.Height)
bmp.SetPixel(x, y, Color.FromArgb(palette.GetArgb(color)));
}
/// <summary>
/// Decode caption from the input stream
/// </summary>
/// <returns>bitmap of the decoded caption</returns>
public static Bitmap DecodeImage(PcsObject pcs, IList <OdsData> data, List <PaletteInfo> palettes)
{
long ticks = DateTime.Now.Ticks;
if (pcs == null || data == null || data.Count == 0)
{
return(new Bitmap(1, 1));
}
int w = data[0].Size.Width;
int h = data[0].Size.Height;
var bm = new FastBitmap(new Bitmap(w, h));
bm.LockImage();
BluRaySupPalette pal = DecodePalette(palettes);
int index = 0;
int ofs = 0;
int xpos = 0;
byte[] buf = data[0].Fragment.ImageBuffer;
index = 0;
do
{
int b = buf[index++] & 0xff;
if (b == 0 && index < buf.Length)
{
b = buf[index++] & 0xff;
if (b == 0)
{
// next line
ofs = (ofs / w) * w;
if (xpos < w)
{
ofs += w;
}
xpos = 0;
}
else
{
int size;
if ((b & 0xC0) == 0x40)
{
if (index < buf.Length)
{
// 00 4x xx -> xxx zeroes
size = ((b - 0x40) << 8) + (buf[index++] & 0xff);
Color c = Color.FromArgb(pal.GetArgb(0));
for (int i = 0; i < size; i++)
{
PutPixel(bm, ofs++, c);
}
xpos += size;
}
}
else if ((b & 0xC0) == 0x80)
{
if (index < buf.Length)
{
// 00 8x yy -> x times value y
size = (b - 0x80);
b = buf[index++] & 0xff;
Color c = Color.FromArgb(pal.GetArgb(b));
for (int i = 0; i < size; i++)
{
PutPixel(bm, ofs++, c);
}
xpos += size;
}
}
else if ((b & 0xC0) != 0)
{
if (index < buf.Length)
{
// 00 cx yy zz -> xyy times value z
size = ((b - 0xC0) << 8) + (buf[index++] & 0xff);
b = buf[index++] & 0xff;
Color c = Color.FromArgb(pal.GetArgb(b));
for (int i = 0; i < size; i++)
{
PutPixel(bm, ofs++, c);
}
xpos += size;
}
}
else
{
// 00 xx -> xx times 0
Color c = Color.FromArgb(pal.GetArgb(0));
for (int i = 0; i < b; i++)
{
PutPixel(bm, ofs++, c);
}
xpos += b;
}
}
}
else
{
PutPixel(bm, ofs++, b, pal);
xpos++;
}
} while (index < buf.Length);
bm.UnlockImage();
return(bm.GetBitmap());
}
