public void Clip(IReadOnlyRegion2D region)
{
var clip = new System.Drawing.Region(System.Drawing.Rectangle.Empty);
foreach (var rect in region.Rects)
{
clip.Union(new System.Drawing.Rectangle(rect.X, rect.Y, rect.Width, rect.Height));
}
Graphics.SetClip(clip, System.Drawing.Drawing2D.CombineMode.Replace);
}
/// <summary>
///
/// </summary>
public void Clip(IReadOnlyRegion2D region)
{
_writer.WriteStartObject();
_writer.WriteString("name", nameof(JSRenderFuncName.clip));
_writer.WriteStartArray("arg");
foreach (var rect in region.Rects)
{
_writer.WriteStartObject();
_writer.WriteNumber("x", rect.X);
_writer.WriteNumber("y", rect.Y);
_writer.WriteNumber("w", rect.Width);
_writer.WriteNumber("h", rect.Height);
_writer.WriteEndObject();
}
_writer.WriteEndArray();
_writer.WriteEndObject();
}
/// <summary>
/// 文字ループ。
/// </summary>
public IEnumerable <ICharMetric> EnumerateCharMetrics(IReadOnlyRegion2D clipRegion)
{
foreach (var lineMetric in EnumerateLineMetrics(clipRegion))
{
foreach (var charMetric in EnumerateCharMetricsByLine(lineMetric.Index, true, true))
{
Debug.Assert(CharUtil.CanDraw(charMetric.Char));
if (clipRegion.IntersectsWith(charMetric.CharRect))
{
yield return(charMetric);
}
if (charMetric.Right > clipRegion.Bounds.Right)
{
break;
}
}
}
}
/// <summary>
/// 行ループ。
/// </summary>
public IEnumerable <ILineMetric> EnumerateLineMetrics(IReadOnlyRegion2D clipRegion)
{
var lineHeight = _textView.GetLineHeight();
var lineIndex = clipRegion.Bounds.Y / lineHeight;
var y = lineIndex * lineHeight;
var lineMetric = new LineMetric();
while (lineIndex < _textView.Doc.Lines.Count)
{
if ((y + lineHeight) > clipRegion.Bounds.Top)
{
yield return(lineMetric.Init(lineIndex, y, lineHeight));
}
lineIndex++;
y += lineHeight;
if (y >= clipRegion.Bounds.Bottom)
{
break;
}
}
}
/// <summary>
///
/// </summary>
private IReadOnlyRegion2D ToScreenCoord(IReadOnlyRegion2D region)
{
return(region
.Offset(_contentOrigin.InvertSign().ToSize())
.Offset(_viewport.Location.ToSize()));
}
/// <summary>
/// コンストラクタ。
/// </summary>
public Renderer(IOffscreen offscreen, Rect2D viewport, IReadOnlyRegion2D clipRegion)
{
_offscreen = offscreen;
_clipRegion = clipRegion;
_viewport = viewport;
}
