/// <summary>
/// 将另一个图片绘制到当前图片的指定位置
/// </summary>
/// <param name="imageBuilder">另一个图片的构建器</param>
/// <param name="left">左坐标</param>
/// <param name="top">上坐标</param>
public override void Draw(ImageBuilder imageBuilder, int left, int top)
{
byte[] simageByte = Data;
byte[] dimageByte = imageBuilder.Data;
int dpixelWidth = imageBuilder.Width;
int dpixelHeight = imageBuilder.Height;
int index = 0;
int doffset = 0;
for (int v = 0; v < dpixelHeight; v++)
{
for (int h = 0; h < dpixelWidth; h++)
{
if (dimageByte[doffset + 3] == 0) //透明色，不处理
{
doffset += 4;
continue;
}
index = (Width * (v + top) + (h + left)) * 4;
if (index < 0)
{
doffset += 4;
continue;
}
else if (index >= simageByte.Length - 3)
{
break;
}
simageByte[index] = dimageByte[doffset];
simageByte[index + 1] = dimageByte[doffset + 1];
simageByte[index + 2] = dimageByte[doffset + 2];
simageByte[index + 3] = dimageByte[doffset + 3];
doffset += 4;
}
}
}
/// <summary>
/// 绘制图像
/// </summary>
/// <param name="bitmap"></param>
/// <param name="left"></param>
/// <param name="top"></param>
public void DrawBitmap(ImageBuilder bitmap, int left, int top)
{
Background.Draw(bitmap, left, top);
}
/// <summary>
/// 新建画布并设置背景
/// </summary>
/// <param name="bitmap"></param>
internal Canvas(ImageBuilder bitmap)
{
Background = bitmap;
}
/// <summary>
/// 设置画布背景
/// </summary>
/// <param name="bitmap"></param>
public void SetBitmap(ImageBuilder bitmap)
{
Background = bitmap;
}
