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public MeasureText ( |
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| buffer | ||
| length | ||
| return | float | |
public static void MeasureTextSample (SKCanvas canvas, int width, int height)
{
canvas.DrawColor (SKColors.White);
using (var paint = new SKPaint ()) {
paint.TextSize = 64.0f;
paint.IsAntialias = true;
paint.Color = new SKColor (0x42, 0x81, 0xA4);
paint.TextEncoding = SKTextEncoding.Utf32;
canvas.DrawText ("Skia (UTF-32)", 0, 64.0f, paint);
var bounds = new SKRect();
paint.MeasureText ("Skia (UTF-32)", ref bounds);
bounds.Top += 64.0f;
bounds.Bottom += 64.0f;
paint.IsStroke = true;
paint.Color = SKColors.Red;
canvas.DrawRect (bounds, paint);
}
using (var paint = new SKPaint ()) {
paint.TextSize = 64.0f;
paint.IsAntialias = true;
paint.Color = new SKColor (0x9C, 0xAF, 0xB7);
paint.TextEncoding = SKTextEncoding.Utf16;
canvas.DrawText ("Skia (UTF-16)", 0, 144.0f, paint);
var bounds = new SKRect();
paint.MeasureText ("Skia (UTF-16)", ref bounds);
bounds.Top += 144.0f;
bounds.Bottom += 144.0f;
paint.IsStroke = true;
paint.Color = SKColors.Red;
canvas.DrawRect (bounds, paint);
}
using (var paint = new SKPaint ()) {
paint.TextSize = 64.0f;
paint.IsAntialias = true;
paint.Color = new SKColor (0xE6, 0xB8, 0x9C);
paint.TextEncoding = SKTextEncoding.Utf8;
canvas.DrawText ("Skia (UTF-8)", 0, 224.0f, paint);
var bounds = new SKRect();
paint.MeasureText ("Skia (UTF-8)", ref bounds);
bounds.Top += 224.0f;
bounds.Bottom += 224.0f;
paint.IsStroke = true;
paint.Color = SKColors.Red;
canvas.DrawRect (bounds, paint);
}
}
private void ReadTextSpans(XElement e, SKCanvas canvas, SKPoint location, SKPaint stroke, SKPaint fill)
{
var nodes = e.Nodes().ToArray();
for (int i = 0; i < nodes.Length; i++)
{
var c = nodes[i];
bool isFirst = i == 0;
bool isLast = i == nodes.Length - 1;
if (c.NodeType == XmlNodeType.Text)
{
// TODO: check for preserve whitespace
var textSegments = ((XText)c).Value.Split(new[] { '\n', '\r' }, StringSplitOptions.RemoveEmptyEntries);
var count = textSegments.Length;
if (count > 0)
{
if (isFirst)
{
textSegments[0] = textSegments[0].TrimStart();
}
if (isLast)
{
textSegments[count - 1] = textSegments[count - 1].TrimEnd();
}
var text = WSRe.Replace(string.Concat(textSegments), " ");
canvas.DrawText(text, location.X, location.Y, fill);
location.X += fill.MeasureText(text);
}
}
else if (c.NodeType == XmlNodeType.Element)
{
var ce = (XElement)c;
if (ce.Name.LocalName == "tspan")
{
var spanFill = fill.Clone();
// the current span may want to change the cursor position
location.X = ReadOptionalNumber(ce.Attribute("x")) ?? location.X;
location.Y = ReadOptionalNumber(ce.Attribute("y")) ?? location.Y;
ReadFontAttributes(ce, spanFill);
var text = ce.Value.Trim();
canvas.DrawText(text, location.X, location.Y, spanFill);
location.X += spanFill.MeasureText(text);
}
}
}
}
private static SKBitmap CreateLabelAsBitmap(LabelStyle style, string text, SKPaint paint)
{
var rect = new SKRect();
paint.MeasureText(text, ref rect);
var backRect = new SKRect(0, 0, rect.Width + 6, rect.Height + 6);
var bitmap = new SKBitmap((int)backRect.Width, (int)backRect.Height);
using (var target = new SKCanvas(bitmap))
{
target.Clear();
DrawBackground(style, backRect, target);
target.DrawText(text, -rect.Left + 3, -rect.Top +3, paint);
return bitmap;
}
}
public static void MeasureTextSample(SKCanvas canvas, int width, int height)
{
canvas.DrawColor(SKColors.White);
using (var paint = new SKPaint()) {
paint.TextSize = 64.0f;
paint.IsAntialias = true;
paint.Color = new SKColor(0x42, 0x81, 0xA4);
paint.TextEncoding = SKTextEncoding.Utf32;
canvas.DrawText("Skia (UTF-32)", 0, 64.0f, paint);
var bounds = new SKRect();
paint.MeasureText("Skia (UTF-32)", ref bounds);
bounds.Top += 64.0f;
bounds.Bottom += 64.0f;
paint.IsStroke = true;
paint.Color = SKColors.Red;
canvas.DrawRect(bounds, paint);
}
using (var paint = new SKPaint()) {
paint.TextSize = 64.0f;
paint.IsAntialias = true;
paint.Color = new SKColor(0x9C, 0xAF, 0xB7);
paint.TextEncoding = SKTextEncoding.Utf16;
canvas.DrawText("Skia (UTF-16)", 0, 144.0f, paint);
var bounds = new SKRect();
paint.MeasureText("Skia (UTF-16)", ref bounds);
bounds.Top += 144.0f;
bounds.Bottom += 144.0f;
paint.IsStroke = true;
paint.Color = SKColors.Red;
canvas.DrawRect(bounds, paint);
}
using (var paint = new SKPaint()) {
paint.TextSize = 64.0f;
paint.IsAntialias = true;
paint.Color = new SKColor(0xE6, 0xB8, 0x9C);
paint.TextEncoding = SKTextEncoding.Utf8;
canvas.DrawText("Skia (UTF-8)", 0, 224.0f, paint);
var bounds = new SKRect();
paint.MeasureText("Skia (UTF-8)", ref bounds);
bounds.Top += 224.0f;
bounds.Bottom += 224.0f;
paint.IsStroke = true;
paint.Color = SKColors.Red;
canvas.DrawRect(bounds, paint);
}
}
