public ImageSprite(Texture2D texture, ImageSourceId sourceId)
{
image = new Image();
var source = texture.GetSpecialSource(sourceId.ForTextureLookup);
image.Source = source;
image.Width = source.PixelWidth;
image.Height = source.PixelHeight;
base.Create(image, sourceId.Cache, true);
if (sourceId.DynamicColor)
{
// Note: This tint effect does not apply additive blending
// (because theoretically the non-additive version should be faster).
// Additive-ness is already applied at the image source.
// (Ditto for Opaque blending)
canvas.Effect = tintEffect = TintEffect.Create(TintEffectMode.Normal);
}
if (sourceId.DynamicRectangle)
{
image.Clip = clipGeometry = new SWM.RectangleGeometry();
}
}
WriteableBitmap CreateSourceFor(ImageSourceId id)
{
BitmapSource original = ImageSource;
// Note: need to recreate temporaryImage each time, because Silverlight
// has some very strange ideas about when to update the image dimensions
Image temporaryImage = new Image();
TintEffect temporaryTintEffect = null;
if (id.WantsPreTint)
{
temporaryTintEffect = TintEffect.Create(id.TintEffectMode);
temporaryImage.Effect = temporaryTintEffect;
temporaryTintEffect.Color = id.ColorForPreTint;
}
temporaryImage.Width = original.PixelWidth;
temporaryImage.Height = original.PixelHeight;
temporaryImage.Source = original;
int width, height;
SWM.TranslateTransform transform;
if (id.UseOriginalDimentions)
{
width = original.PixelWidth;
height = original.PixelHeight;
transform = null;
}
else
{
width = id.SourceWidth;
height = id.SourceHeight;
transform = new SWM.TranslateTransform();
transform.X = -id.SourceX;
transform.Y = -id.SourceY;
}
WriteableBitmap output = new WriteableBitmap(width, height);
output.Render(temporaryImage, transform);
output.Invalidate();
if (temporaryTintEffect != null)
{
temporaryImage.Effect = null;
temporaryTintEffect.Release();
}
return(output);
}