/// <summary> /// Clears the Target /// </summary> protected abstract void ClearInternal(RenderTarget target, Clear flags, Color color, float depth, int stencil, RectInt viewport);
public void GetPixels(Memory <Color> dest, Point2 destPosition, Point2 destSize, RectInt sourceRect)
{
var src = new Span <Color>(Pixels);
var dst = dest.Span;
// can't be outside of the source image
if (sourceRect.Left < 0)
{
sourceRect.Left = 0;
}
if (sourceRect.Top < 0)
{
sourceRect.Top = 0;
}
if (sourceRect.Right > Width)
{
sourceRect.Right = Width;
}
if (sourceRect.Bottom > Height)
{
sourceRect.Bottom = Height;
}
// can't be larger than our destination
if (sourceRect.Width > destSize.X - destPosition.X)
{
sourceRect.Width = destSize.X - destPosition.X;
}
if (sourceRect.Height > destSize.Y - destPosition.Y)
{
sourceRect.Height = destSize.Y - destPosition.Y;
}
for (int y = 0; y < sourceRect.Height; y++)
{
var from = src.Slice(sourceRect.X + (sourceRect.Y + y) * Width, sourceRect.Width);
var to = dst.Slice(destPosition.X + (destPosition.Y + y) * destSize.X, sourceRect.Width);
from.CopyTo(to);
}
}
/// <summary>
/// Clears the Target
/// </summary>
public void Clear(RenderTarget target, Clear flags, Color color, float depth, int stencil, RectInt viewport)
{
if (!target.Renderable)
{
throw new Exception("Render Target cannot currently be drawn to");
}
var bounds = new RectInt(0, 0, target.RenderWidth, target.RenderHeight);
var clamped = viewport.OverlapRect(bounds);
ClearInternal(target, flags, color, depth, stencil, clamped);
}