using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using SkiaSharp;
using CPF.Drawing;
using System.Globalization;
namespace CPF.Skia
{
public static class Extension
{
static Extension()
{
SKFontManager fontManager = SKFontManager.Default;
var n = CultureInfo.InstalledUICulture.Name;
var temp = n.Split('-');
foreach (var item in temp)
{
if (!string.IsNullOrWhiteSpace(item))
{
var f = fontManager.FontFamilies.FirstOrDefault(a => a.EndsWith(" " + item.Trim(), StringComparison.OrdinalIgnoreCase));
if (f != null)
{
defaultFont = f;
break;
}
}
}
if (defaultFont == null)
{
defaultFont = fontManager.FontFamilies.FirstOrDefault(a => a.EndsWith(" mono", StringComparison.OrdinalIgnoreCase));
}
if (defaultFont == null)
{
defaultFont = fontManager.FontFamilies.FirstOrDefault();
}
}
static string defaultFont;
private static string GetFontName(SKFontManager fontManager)
{
//var f = fontManager.FontFamilies.FirstOrDefault(a => a.EndsWith(" cn", StringComparison.OrdinalIgnoreCase));
//if (f == null)
//{
// f = fontManager.FontFamilies.FirstOrDefault(a => a.EndsWith(" zh", StringComparison.OrdinalIgnoreCase));
//}
//if (f == null)
//{
// f = fontManager.FontFamilies.FirstOrDefault(a => a.EndsWith(" mono", StringComparison.OrdinalIgnoreCase));
//}
//if (f == null)
//{
// f = fontManager.FontFamilies.FirstOrDefault();
//}
//return f;
return defaultFont;
}
static string[] bcp47 = new string[] { "en", "zh", "ja", "kr", "enGB", "sw" };
public static void DrawText(this SKCanvas canvas, SKPaint paint, string text, float x, float y)
{
if (!string.IsNullOrWhiteSpace(text))
{
var fontManager = SKFontManager.Default;
var t = paint.Typeface;
var family = t.FamilyName;
var si = new StringInfo(text);
for (int i = 0; i < si.LengthInTextElements; i++)
{
var str = si.SubstringByTextElements(i, 1);
if (str.Length != 2)
{
if (str != "\r")
{
if (t.CountGlyphs(str) == 0)//如果当前字体不支持该字符
{
using (var font = fontManager.MatchCharacter(family, t.FontWeight, t.FontWidth, t.FontSlant, bcp47, str[0]))//检索系统默认支持的字体
{
SKTypeface f = null;
if (font == null)
{
string fn = GetFontName(fontManager);
if (fn != null)
{
f = fontManager.MatchFamily(fn, t.FontStyle);
if (f != null)
{
paint.Typeface = f;
}
else
{
paint.Typeface = t;
}
}
else
{
paint.Typeface = t;
}
}
else
{
paint.Typeface = font;
}
canvas.DrawText(str, x, y, paint);
x += paint.MeasureText(str);
if (f != null)
{
f.Dispose();
}
}
}
else
{
paint.Typeface = t;
canvas.DrawText(str, x, y, paint);
x += paint.MeasureText(str);
}
}
else
{
continue;
}
}
else
{
using (var font = fontManager.MatchCharacter(family, t.FontWeight, t.FontWidth, t.FontSlant, bcp47, StringUtilities.GetUnicodeCharacterCode(str, SKTextEncoding.Utf32)))
{
if (font == null)
{
paint.Typeface = t;
}
else
{
paint.Typeface = font;
}
canvas.DrawText(str, x, y, paint);
x += paint.MeasureText(str);
}
}
}
paint.Typeface = t;
}
}
public static float MeasureString(this SKPaint paint, string text)
{
float w = 0;
if (!string.IsNullOrEmpty(text))
{
var fontManager = SKFontManager.Default;
var t = paint.Typeface;
var family = t.FamilyName;
var si = new StringInfo(text);
for (int i = 0; i < si.LengthInTextElements; i++)
{
var str = si.SubstringByTextElements(i, 1);
if (str.Length != 2)
{
if (str != "\r" && str != "\n")
{
if (str == " ")
{
w += paint.FontSpacing / 2;
}
else// if (str=="\t")
{
if (t.CountGlyphs(str) == 0)
{
using (var font = fontManager.MatchCharacter(family, t.FontWeight, t.FontWidth, t.FontSlant, bcp47, str[0]))
{
SKTypeface f = null;
if (font == null)
{
string fn = GetFontName(fontManager);
if (fn != null)
{
f = fontManager.MatchFamily(fn, t.FontStyle);
if (f != null)
{
paint.Typeface = f;
}
else
{
paint.Typeface = t;
}
}
else
{
paint.Typeface = t;
}
}
else
{
paint.Typeface = font;
}
w += paint.MeasureText(str);
if (f != null)
{
f.Dispose();
}
}
}
else
{
paint.Typeface = t;
w += paint.MeasureText(str);
}
}
}
else
{
continue;
}
}
else
{
using (var font = fontManager.MatchCharacter(family, t.FontWeight, t.FontWidth, t.FontSlant, bcp47, StringUtilities.GetUnicodeCharacterCode(str, SKTextEncoding.Utf32)))
{
if (font == null)
{
paint.Typeface = t;
}
else
{
paint.Typeface = font;
}
w += paint.MeasureText(str);
}
}
}
paint.Typeface = t;
}
return w;
}
///
/// 计算每个字符的宽度，不能有换行符
///
///
///
///
public static IList<(string, float)> MeasureAllChar(this SKPaint paint, string text)
{
List<(string, float)> list = new List<(string, float)>();
if (!string.IsNullOrEmpty(text))
{
var fontManager = SKFontManager.Default;
var t = paint.Typeface;
var family = t.FamilyName;
var si = new StringInfo(text);
for (int i = 0; i < si.LengthInTextElements; i++)
{
var str = si.SubstringByTextElements(i, 1);
if (str.Length != 2)
{
if (str != "\r" && str != "\n")
{
if (str == " ")
{
//list.Add((str, paint.FontSpacing / 2));
list.Add((str, paint.MeasureText(str)));
}
else// if (str=="\t")
{
if (t.CountGlyphs(str) == 0)
{
using (var font = fontManager.MatchCharacter(family, t.FontWeight, t.FontWidth, t.FontSlant, bcp47, str[0]))
{
SKTypeface f = null;
if (font == null)
{
string fn = GetFontName(fontManager);
if (fn != null)
{
f = fontManager.MatchFamily(fn, t.FontStyle);
if (f != null)
{
paint.Typeface = f;
}
else
{
paint.Typeface = t;
}
}
else
{
paint.Typeface = t;
}
}
else
{
paint.Typeface = font;
}
list.Add((str, paint.MeasureText(str)));
if (f != null)
{
f.Dispose();
}
}
}
else
{
paint.Typeface = t;
list.Add((str, paint.MeasureText(str)));
}
}
}
else
{
continue;
}
}
else
{
using (var font = fontManager.MatchCharacter(family, t.FontWeight, t.FontWidth, t.FontSlant, bcp47, StringUtilities.GetUnicodeCharacterCode(str, SKTextEncoding.Utf32)))
{
if (font == null)
{
paint.Typeface = t;
}
else
{
paint.Typeface = font;
}
list.Add((str, paint.MeasureText(str)));
}
}
}
paint.Typeface = t;
}
return list;
}
internal static (int, float, string) BreakText(this IList<(string, float)> list, int start, float maxWidth, bool getText = true)
{
float w = 0;
int count = 0;
for (int i = start; i < list.Count; i++)
{
count++;
w += list[i].Item2;
if (w > maxWidth)
{
if (i != start)
{
w -= list[i].Item2;
count--;
}
break;
}
}
string text = string.Empty;
if (count > 0 && getText)
{
StringBuilder sb = new StringBuilder();
for (int i = start; i < start + count; i++)
{
sb.Append(list[i].Item1);
}
text = sb.ToString();
}
return (count, w, text);
}
public static void DrawTextPath(this SKCanvas canvas, SKPaint paint, SKPaint border, string text, float x, float y)
{
if (!string.IsNullOrWhiteSpace(text))
{
var fontManager = SKFontManager.Default;
var t = paint.Typeface;
var family = t.FamilyName;
var si = new StringInfo(text);
for (int i = 0; i < si.LengthInTextElements; i++)
{
var str = si.SubstringByTextElements(i, 1);
if (str.Length != 2)
{
if (str != "\r")
{
if (t.CountGlyphs(str) == 0)
{
using (var font = fontManager.MatchCharacter(family, t.FontWeight, t.FontWidth, t.FontSlant, bcp47, str[0]))
{
SKTypeface f = null;
if (font == null)
{
string fn = GetFontName(fontManager);
if (fn != null)
{
f = fontManager.MatchFamily(fn, t.FontStyle);
if (f != null)
{
paint.Typeface = f;
}
else
{
paint.Typeface = t;
}
}
else
{
paint.Typeface = t;
}
}
else
{
paint.Typeface = font;
}
using (var path = paint.GetTextPath(str, x, y))
{
canvas.DrawPath(path, border);
canvas.DrawPath(path, paint);
}
x += paint.MeasureText(str);
if (f != null)
{
f.Dispose();
}
}
}
else
{
paint.Typeface = t;
using (var path = paint.GetTextPath(str, x, y))
{
canvas.DrawPath(path, border);
canvas.DrawPath(path, paint);
}
x += paint.MeasureText(str);
}
}
else
{
continue;
}
}
else
{
using (var font = fontManager.MatchCharacter(family, t.FontWeight, t.FontWidth, t.FontSlant, bcp47, StringUtilities.GetUnicodeCharacterCode(str, SKTextEncoding.Utf32)))
{
if (font == null)
{
paint.Typeface = t;
}
else
{
paint.Typeface = font;
}
using (var path = paint.GetTextPath(str, x, y))
{
canvas.DrawPath(path, border);
canvas.DrawPath(path, paint);
}
x += paint.MeasureText(str);
}
}
}
paint.Typeface = t;
}
}
public static Matrix ToMatrix(this SKMatrix matrix)
{
return new Matrix(matrix.ScaleX, matrix.SkewY, matrix.SkewX, matrix.ScaleY, matrix.TransX, matrix.TransY)
//{ Persp0 = matrix.Persp0, Persp1 = matrix.Persp1, Persp2 = matrix.Persp2 }
;
}
public static SKMatrix ToMatrix(this Matrix matrix)
{
//return new SKMatrix(matrix.M11, matrix.M21, matrix.OffsetX, matrix.M12, matrix.M22, matrix.OffsetY, 0, 0, 1);
return new SKMatrix()
{
ScaleX = matrix.M11,
SkewX = matrix.M21,
TransX = matrix.OffsetX,
SkewY = matrix.M12,
ScaleY = matrix.M22,
TransY = matrix.OffsetY,
Persp2 =1// matrix.Persp2,
//Persp0 = matrix.Persp0,
//Persp1 = matrix.Persp1
};
}
public static SKPoint ToSKPoint(this Point p)
{
return new SKPoint((float)p.X, (float)p.Y);
}
public static SKRect ToSKRect(this Rect r)
{
return new SKRect((float)r.X, (float)r.Y, (float)r.Right, (float)r.Bottom);
}
public static Rect ToRect(this SKRect r)
{
return new Rect(r.Left, r.Top, r.Right - r.Left, r.Bottom - r.Top);
}
public static SKColor ToSKColor(this Color c)
{
return new SKColor(c.R, c.G, c.B, c.A);
}
//public static SKColorType ToSkColorType(this PixelFormat fmt)
//{
// if (fmt == PixelFormat.Rgb565)
// return SKColorType.Rgb565;
// if (fmt == PixelFormat.Bgra8888)
// return SKColorType.Bgra8888;
// if (fmt == PixelFormat.Rgba8888)
// return SKColorType.Rgba8888;
// throw new ArgumentException("Unknown pixel format: " + fmt);
//}
//public static PixelFormat ToPixelFormat(this SKColorType fmt)
//{
// if (fmt == SKColorType.Rgb565)
// return PixelFormat.Rgb565;
// if (fmt == SKColorType.Bgra8888)
// return PixelFormat.Bgra8888;
// if (fmt == SKColorType.Rgba8888)
// return PixelFormat.Rgba8888;
// throw new ArgumentException("Unknown pixel format: " + fmt);
//}
//public static SKShaderTileMode ToSKShaderTileMode(this GradientSpreadMethod m)
//{
// switch (m)
// {
// default:
// case GradientSpreadMethod.Pad: return SKShaderTileMode.Clamp;
// case GradientSpreadMethod.Reflect: return SKShaderTileMode.Mirror;
// case GradientSpreadMethod.Repeat: return SKShaderTileMode.Repeat;
// }
//}
//public static SKTextAlign ToSKTextAlign(this TextAlignment a)
//{
// switch (a)
// {
// default:
// case TextAlignment.Left: return SKTextAlign.Left;
// case TextAlignment.Center: return SKTextAlign.Center;
// case TextAlignment.Right: return SKTextAlign.Right;
// }
//}
//public static TextAlignment ToTextAlignment(this SKTextAlign a)
//{
// switch (a)
// {
// default:
// case SKTextAlign.Left: return TextAlignment.Left;
// case SKTextAlign.Center: return TextAlignment.Center;
// case SKTextAlign.Right: return TextAlignment.Right;
// }
//}
}
}