private static SKPaint ApplyWrapperTo(ref DrawingContextImpl.PaintWrapper wrapper,
ref IDisposable curr, SKPaint paint)
{
curr?.Dispose();
curr = wrapper.ApplyTo(paint);
return(wrapper.Paint);
}
private static void ApplyWrapperTo(ref SKPaint current, DrawingContextImpl.PaintWrapper wrapper,
ref IDisposable curr, SKPaint paint)
{
if (current == wrapper.Paint)
{
return;
}
curr?.Dispose();
curr = wrapper.ApplyTo(paint);
}
internal void Draw(DrawingContextImpl context,
SKCanvas canvas, SKPoint origin,
DrawingContextImpl.PaintWrapper foreground)
{
/* TODO: This originated from Native code, it might be useful for debugging character positions as
* we improve the FormattedText support. Will need to port this to C# obviously. Rmove when
* not needed anymore.
*
* SkPaint dpaint;
* ctx->Canvas->save();
* ctx->Canvas->translate(origin.fX, origin.fY);
* for (int c = 0; c < Lines.size(); c++)
* {
* dpaint.setARGB(255, 0, 0, 0);
* SkRect rc;
* rc.fLeft = 0;
* rc.fTop = Lines[c].Top;
* rc.fRight = Lines[c].Width;
* rc.fBottom = rc.fTop + LineOffset;
* ctx->Canvas->drawRect(rc, dpaint);
* }
* for (int c = 0; c < Length; c++)
* {
* dpaint.setARGB(255, c % 10 * 125 / 10 + 125, (c * 7) % 10 * 250 / 10, (c * 13) % 10 * 250 / 10);
* dpaint.setStyle(SkPaint::kFill_Style);
* ctx->Canvas->drawRect(Rects[c], dpaint);
* }
* ctx->Canvas->restore();
*/
SKPaint paint = _paint;
IDisposable currd = null;
var currentWrapper = foreground;
try
{
SKPaint currFGPaint = ApplyWrapperTo(ref foreground, ref currd, paint);
bool hasCusomFGBrushes = _foregroundBrushes.Any();
for (int c = 0; c < _skiaLines.Count; c++)
{
AvaloniaFormattedTextLine line = _skiaLines[c];
float x = TransformX(origin.X, 0, paint.TextAlign);
if (!hasCusomFGBrushes)
{
var subString = _text.Substring(line.Start, line.Length);
canvas.DrawText(subString, x, origin.Y + line.Top + _lineOffset, paint);
}
else
{
float currX = x;
string subStr;
int len;
for (int i = line.Start; i < line.Start + line.Length;)
{
var fb = GetNextForegroundBrush(ref line, i, out len);
if (fb != null)
{
//TODO: figure out how to get the brush size
currentWrapper = context.CreatePaint(fb, new Size());
}
else
{
if (!currentWrapper.Equals(foreground))
{
currentWrapper.Dispose();
}
currentWrapper = foreground;
}
subStr = _text.Substring(i, len);
if (currFGPaint != currentWrapper.Paint)
{
currFGPaint = ApplyWrapperTo(ref currentWrapper, ref currd, paint);
}
canvas.DrawText(subStr, currX, origin.Y + line.Top + _lineOffset, paint);
i += len;
currX += paint.MeasureText(subStr);
}
}
}
}
finally
{
if (!currentWrapper.Equals(foreground))
{
currentWrapper.Dispose();
}
currd?.Dispose();
}
}
