private record Entry(
FontWeight FontWeight,
FontStyle FontStyle,
FontFamily FontFamily,
double FontSize,
double CharacterSpacing,
Windows.UI.Color Foreground,
BaseLineAlignment BaseLineAlignment,
TextDecorations TextDecorations)
{
public Entry(FontWeight fontWeight, FontStyle fontStyle, FontFamily fontFamily, double fontSize, double characterSpacing, Windows.UI.Color foreground, BaseLineAlignment baselineAlignment, TextDecorations textDecorations)
{
FontWeight = fontWeight;
FontStyle = fontStyle;
FontFamily = fontFamily;
FontSize = fontSize;
CharacterSpacing = characterSpacing;
Foreground = foreground;
BaseLineAlignment = baselineAlignment;
TextDecorations = textDecorations;
}
/// <summary>
/// Builds a TextPaint configuration.
/// </summary>
/// <remarks>
/// This is required for some JNI related reason.
/// At some point, the reference to a member field TextPaint gets collected if used
/// in some of the StaticLayout methods, so we create a local copy of the
/// paint to be used in this context.
/// One solution could be to use a <see cref="Android.Runtime.JNIEnv.NewGlobalRef"/>, but the release of the reference
/// can be tricky to place properly.
/// </remarks>
/// <returns>A <see cref="TextPaint"/> instance.</returns>
public static TextPaint GetPaint(FontWeight fontWeight, FontStyle fontStyle, FontFamily fontFamily, double fontSize, double characterSpacing, Windows.UI.Color foreground, Shader shader, BaseLineAlignment baselineAlignment, TextDecorations textDecorations)
{
if (shader != null)
{
// The "Shader" native object can't be use as a cache key
return(InnerBuildPaint(fontWeight, fontStyle, fontFamily, fontSize, characterSpacing, foreground, shader, baselineAlignment, textDecorations));
}
var key = new Entry(fontWeight, fontStyle, fontFamily, fontSize, characterSpacing, foreground, baselineAlignment, textDecorations);
if (!_entries.TryGetValue(key, out var paint))
{
_entries.Add(key, paint = InnerBuildPaint(fontWeight, fontStyle, fontFamily, fontSize, characterSpacing, foreground, shader, baselineAlignment, textDecorations));
}
return(paint);
}
