internal _ImageSourceTransforms UseTransforms()
{
if (_Transforms != null)
{
return(_Transforms);
}
_Transforms = new _ImageSourceTransforms(this, _SourceWidth, _SourceHeight);
return(_Transforms);
}
/// <summary>
/// Sets the source bitmap size.
/// </summary>
/// <param name="width">The image width, in pixels.</param>
/// <param name="height">The image height, in pixels.</param>
/// <returns>Self.</returns>
public ImageSource WithSourceSize(int width, int height)
{
if (width == _SourceWidth && height == _SourceHeight)
{
return(this);
}
_SourceWidth = width;
_SourceHeight = height;
_Transforms = null;
return(this);
}
/// <summary>
/// Sets the source bitmap size.
/// </summary>
/// <param name="source">The new image source.</param>
/// <param name="width">The image width, in pixels.</param>
/// <param name="height">The image height, in pixels.</param>
/// <returns>Self.</returns>
public ImageSource WithSource(Object source, int width, int height)
{
if (source == _Source && width == _SourceWidth && height == _SourceHeight)
{
return(this);
}
_Source = source;
_SourceWidth = width;
_SourceHeight = height;
_Transforms = null;
return(this);
}
/// <summary>
/// expands the Texture coordinates and compensates the scale so the actual screen size remains unchanged.
/// </summary>
/// <param name="expand">The size to expand, in pixels</param>
/// <returns>itself.</returns>
/// <remarks>
/// This method is useful for tightly packed tiled bitmaps, where we want to contract the texture half a pixel (expand = -0.5f)
/// </remarks>
public ImageSource WithExpandedSource(float expand)
{
var v2exp = new XY(expand);
var s1 = _SourceUVMax - _SourceUVMin;
_SourceUVMin -= v2exp;
_SourceUVMax += v2exp;
var s2 = _SourceUVMax - _SourceUVMin;
_OutputScale = _OutputScale * s1 / s2;
_Pivot = _Pivot * s2 / s1;
_Transforms = null;
return(this);
}
/// <summary>
/// Sets the mirror flags.
/// </summary>
/// <param name="mirrorX">The horizontal mirror.</param>
/// <param name="mirrorY">The vertical mirror.</param>
/// <returns>Self.</returns>
public ImageSource WithMirror(bool mirrorX, bool mirrorY)
{
var o = _ImageFlags.None;
if (mirrorX)
{
o |= _ImageFlags.FlipHorizontal;
}
if (mirrorY)
{
o |= _ImageFlags.FlipVertical;
}
if (_OrientationMask == o)
{
return(this);
}
_OrientationMask = o;
_Transforms = null;
return(this);
}
/// <summary>
/// Sets the new output scale.
/// </summary>
/// <param name="scale">The scale.</param>
/// <returns>Self.</returns>
public ImageSource WithScale(float scale)
{
_OutputScale = new XY(scale);
_Transforms = null;
return(this);
}
/// <summary>
/// Sets a new pivot/mirror precedence
/// </summary>
/// <param name="precedence">the mirror/pivot precedence.</param>
/// <returns>Self.</returns>
public ImageSource WithPivotPrecedence(bool precedence)
{
_PivotPrecedence = precedence;
_Transforms = null;
return(this);
}
/// <summary>
/// Sets a new pivot.
/// </summary>
/// <param name="pivot">The new pivot.</param>
/// <returns>Self.</returns>
public ImageSource WithPivot(Point2 pivot)
{
_Pivot = pivot.XY;
_Transforms = null;
return(this);
}
