private static RectangleF GetSourceRect(D2DImageStrip2D imageStrip, int index)
{
if (index < 0 || index >= imageStrip.Count)
{
throw new ArgumentOutOfRangeException(nameof(index));
}
int xIndex, yIndex;
float w, h;
switch (imageStrip.Orientation)
{
case ImageStripOrientation.Horizontal:
w = imageStrip.UnitWidth;
h = imageStrip.UnitHeight;
xIndex = index % imageStrip.ArrayCount;
yIndex = index / imageStrip.ArrayCount;
break;
case ImageStripOrientation.Vertical:
w = imageStrip.UnitWidth;
h = imageStrip.UnitHeight;
xIndex = index / imageStrip.ArrayCount;
yIndex = index % imageStrip.ArrayCount;
break;
default:
throw new ArgumentOutOfRangeException();
}
var x = xIndex * w;
var y = yIndex * h;
return(new RectangleF(x, y, w, h));
}
public static void DrawImageStripUnit(this RenderContext context, D2DImageStrip2D imageStrip, int index, float destX, float destY, float destWidth, float destHeight, float opacity)
{
if (index < 0 || index >= imageStrip.Count)
{
throw new ArgumentOutOfRangeException(nameof(index), index, null);
}
var srcRect = GetSourceRect(imageStrip, index);
context.DrawBitmap(imageStrip, destX, destY, destWidth, destHeight, srcRect.X, srcRect.Y, srcRect.Width, srcRect.Height, opacity);
}
public static void DrawImageStripUnit(this RenderContext context, D2DImageStrip2D imageStrip, int index, float destX, float destY, InterpolationMode interpolationMode, CompositeMode compositeMode)
{
if (index < 0 || index >= imageStrip.Count)
{
throw new ArgumentOutOfRangeException(nameof(index), index, null);
}
var srcRect = GetSourceRect(imageStrip, index);
context.DrawImage(imageStrip, destX, destY, srcRect.X, srcRect.Y, srcRect.Width, srcRect.Height, interpolationMode, compositeMode);
}