|
public static IsAreaNegativeOrEmpty ( |
||
| rect | ||
| return | bool | |
public void Apply(PixelFunctionXY pixelFunc, Rectangle region)
{
Rectangle rect = ClampRectangle(region, Bounds);
if (Rectangle.IsAreaNegativeOrEmpty(rect))
{
return;
}
int sourceOffset = rect.Y * ScanlineSize + rect.X * _bytesPerPixel;
for (int y = 0; y < rect.Height; y++)
{
int lineIndex = sourceOffset + y * ScanlineSize;
for (int x = 0; x < rect.Width; x++)
{
int index = lineIndex + x * _bytesPerPixel;
Color result = pixelFunc(new Color(
_data[index + 0],
_data[index + 1],
_data[index + 2],
_data[index + 3]), rect.X + x, rect.Y + y);
_data[index + 0] = result.R;
_data[index + 1] = result.G;
_data[index + 2] = result.B;
_data[index + 3] = result.A;
}
}
}
public void Set(TextureResource data, Point location)
{
if (data == null)
{
return;
}
Rectangle rect = ClampRectangle(new Rectangle(location, data.Size), Bounds);
if (Rectangle.IsAreaNegativeOrEmpty(rect))
{
return;
}
int dataScan = data.ScanlineSize;
int clampScan = rect.Width * _bytesPerPixel;
int sourceOffset = (rect.Y - location.Y) * dataScan + (rect.X - location.X) * _bytesPerPixel;
int targetOffset = rect.Y * ScanlineSize + rect.X * _bytesPerPixel;
for (int y = 0; y < rect.Height; y++)
{
int sourceIndex = sourceOffset + y * dataScan;
int destIndex = targetOffset + y * ScanlineSize;
Array.Copy(data._data, sourceIndex, _data, destIndex, clampScan);
}
}
public void SetComposite(TextureResource data, Point location)
{
Rectangle rect = ClampRectangle(new Rectangle(location, data.Size), Bounds);
if (Rectangle.IsAreaNegativeOrEmpty(rect))
{
return;
}
int dataScan = data.ScanlineSize;
int clampScan = rect.Width * _bytesPerPixel;
int sourceOffset = (rect.Y - location.Y) * dataScan + (rect.X - location.X) * _bytesPerPixel;
int targetOffset = rect.Y * ScanlineSize + rect.X * _bytesPerPixel;
for (int y = 0; y < rect.Height; y++)
{
for (int x = 0; x < rect.Width; x++)
{
int sourceIndex = sourceOffset + y * dataScan + x * _bytesPerPixel;
int destIndex = targetOffset + y * ScanlineSize + x * _bytesPerPixel;
float alpha = data._data[sourceIndex + 3] / 255f;
_data[destIndex + 0] = (byte)(_data[destIndex + 0] * (1f - alpha) + data._data[sourceIndex + 0] * alpha);
_data[destIndex + 1] = (byte)(_data[destIndex + 1] * (1f - alpha) + data._data[sourceIndex + 1] * alpha);
_data[destIndex + 2] = (byte)(_data[destIndex + 2] * (1f - alpha) + data._data[sourceIndex + 2] * alpha);
_data[destIndex + 3] = (byte)Math.Min(255, _data[destIndex + 3] * (1f - alpha) + data._data[sourceIndex + 3]);
}
}
}
public TextureResource Crop(Rectangle region)
{
Rectangle rect = ClampRectangle(region, Bounds);
if (Rectangle.IsAreaNegativeOrEmpty(rect))
{
return(new TextureResource(0, 0));
}
TextureResource sub = new TextureResource(rect.Width, rect.Height);
int priScan = ScanlineSize;
int subScan = sub.ScanlineSize;
int sourceOffset = rect.Y * priScan + rect.X * _bytesPerPixel;
for (int y = 0; y < rect.Height; y++)
{
int sourceIndex = sourceOffset + y * priScan;
int destIndex = y * subScan;
Array.Copy(_data, sourceIndex, sub._data, destIndex, subScan);
}
return(sub);
}
