public static Texture FromBitmap(Bitmap bmp)
{
byte[] data = new byte[bmp.Size.Width * bmp.Size.Height * 4];
BitmapData bd = bmp.LockBits(new Rectangle(0, 0, bmp.Size.Width, bmp.Size.Height), ImageLockMode.ReadOnly, PixelFormat.Format32bppArgb);
Marshal.Copy(bd.Scan0, data, 0, bmp.Size.Width * bmp.Size.Height * 4);
bmp.UnlockBits(bd);
Texture t = new Texture(bmp.Size.Width, bmp.Size.Height, data);
return t;
}
/// <summary>
/// Draws actual texture to specified texture.
/// </summary>
/// <param name="txt">Texture into which will be drawn</param>
/// <param name="xpos">X position</param>
/// <param name="ypos">Z position</param>
/// <param name="width">Drawn width</param>
/// <param name="height">Drawn height</param>
/// <param name="transparent">Use only alpha for pixels only as visible/hidden</param>
/// <param name="alpha">Use real alpha</param>
public void DrawTo(Texture txt, int xpos, int ypos, int width, int height, DrawMode mode)
{
int dl, dt; // dest leftop pixel
int sl, st; // source leftop pixel
int w, h; // size of really drawn area
sl = xpos < 0 ? -xpos : 0; // pokud vykreslujem pred nulu, tak to pred nulou oriznem
st = ypos < 0 ? -ypos : 0;
dl = xpos < 0 ? 0 : xpos; // pokud vykreslujem pod nulu, tak to nevykreslime a zacnem az u nuly
dt = ypos < 0 ? 0 : ypos;
w = width; // sirka nakonec vykreslenyho vyrezu
h = height;
w = this.width < width ? this.width : width; // pokud to co kreslime je mensi
h = this.height < height ? this.height : height;
w = xpos < 0 ? w+xpos : w; // pokud to kreslime pred nulu
h = ypos < 0 ? h+ypos : h;
w = txt.width < dl + w ? txt.width - dl : w; // pokud se to tam cely nevejde
h = txt.height < dt + h ? txt.height - dt : h; // pokud se to tam cely nevejde
if (mode != DrawMode.NO_ALPHA)
{
//todo
throw new Exception("not implemented yet");
for (; ; )
for (; ; )
{
//txt.
}
}
else // mode == no_alpha
{
for (int y = 0; y < h; y++) // projdem vsechny radky teto textury
{
Buffer.BlockCopy(
this.data,
(sl + (st + y)*this.width) * 4,
txt.data,
(dl + (dt + y)*txt.width) * 4,
w*4);
//bacha, jsou to quady
}
}
}
