private unsafe void CreateShapedChar(hb_glyph_info_t *info, hb_glyph_position_t *position, Int32 cluster, out ShapedChar result)
{
var cGlyphIndex = (Int32)info->codepoint;
var cOffsetX = (Int16)Math.Round(position->x_offset / 64f, MidpointRounding.AwayFromZero);
var cOffsetY = (Int16)Math.Round(position->y_offset / 64f, MidpointRounding.AwayFromZero);
var cAdvance = (Int16)Math.Round((position->x_advance == 0 ? position->y_advance : position->x_advance) / 64f, MidpointRounding.AwayFromZero);
result = new ShapedChar(cGlyphIndex, cluster, cOffsetX, cOffsetY, cAdvance);
}
public void ShapedString_ProvidesCorrectShapingData_InEnglish()
{
var sstr = default(ShapedString);
GivenAnUltravioletApplicationWithNoWindow()
.WithPlugin(new FreeTypeFontPlugin())
.WithContent(content =>
{
var font = content.Load <UltravioletFont>("Fonts/FiraSans");
using (var textShaper = new HarfBuzzTextShaper(content.Ultraviolet))
{
textShaper.SetUnicodeProperties(TextDirection.LeftToRight, TextScript.Latin, "en");
textShaper.Append("Hello, world!");
sstr = textShaper.CreateShapedString(font.Regular);
}
})
.RunForOneFrame();
var chars = new ShapedChar[sstr.Length];
sstr.CopyTo(0, chars, 0, sstr.Length);
var glyphIndices = chars.Select(x => x.GlyphIndex).ToArray();
TheResultingCollection(glyphIndices)
.ShouldBeExactly(111, 412, 514, 514, 555, 2122, 3, 696, 555, 609, 514, 393, 2125);
var sourceIndices = chars.Select(x => x.SourceIndex).ToArray();
TheResultingCollection(sourceIndices)
.ShouldBeExactly(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
var advances = chars.Select(x => x.Advance).ToArray();
TheResultingCollection(advances)
.ShouldBeExactly(11, 9, 5, 5, 9, 4, 4, 11, 9, 6, 5, 10, 4);
var offsets_x = chars.Select(x => x.OffsetX).ToArray();
TheResultingCollection(offsets_x)
.ShouldContainTheSpecifiedNumberOfItems(13)
.ShouldContainItemsSatisfyingTheCondition(x => x == 0);
var offsets_y = chars.Select(x => x.OffsetY).ToArray();
TheResultingCollection(offsets_y)
.ShouldContainTheSpecifiedNumberOfItems(13)
.ShouldContainItemsSatisfyingTheCondition(x => x == 0);
}
public void ShapedString_ProvidesCorrectShapingData_InArabic()
{
var sstr = default(ShapedString);
GivenAnUltravioletApplicationWithNoWindow()
.WithPlugin(new FreeTypeFontPlugin())
.WithContent(content =>
{
var font = content.Load <UltravioletFont>("Fonts/FiraGO-Regular");
using (var textShaper = new HarfBuzzTextShaper(content.Ultraviolet))
{
textShaper.SetUnicodeProperties(TextDirection.RightToLeft, TextScript.Arabic, "ar");
textShaper.Append("مرحبا بالعالم");
sstr = textShaper.CreateShapedString(font.Regular);
}
})
.RunForOneFrame();
var chars = new ShapedChar[sstr.Length];
sstr.CopyTo(0, chars, 0, sstr.Length);
var glyphIndices = chars.Select(x => x.GlyphIndex).ToArray();
TheResultingCollection(glyphIndices)
.ShouldBeExactly(2531, 2513, 2150, 2392, 2513, 2150, 2173, 3, 2150, 2172, 2243, 2288, 2533);
var sourceIndices = chars.Select(x => x.SourceIndex).ToArray();
TheResultingCollection(sourceIndices)
.ShouldBeExactly(12, 11, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0);
var advances = chars.Select(x => x.Advance).ToArray();
TheResultingCollection(advances)
.ShouldBeExactly(15, 5, 5, 13, 5, 5, 6, 6, 5, 7, 15, 9, 13);
var offsets_x = chars.Select(x => x.OffsetX).ToArray();
TheResultingCollection(offsets_x)
.ShouldContainTheSpecifiedNumberOfItems(13)
.ShouldContainItemsSatisfyingTheCondition(x => x == 0);
var offsets_y = chars.Select(x => x.OffsetY).ToArray();
TheResultingCollection(offsets_y)
.ShouldContainTheSpecifiedNumberOfItems(13)
.ShouldContainItemsSatisfyingTheCondition(x => x == 0);
}
/// <inheritdoc/>
public override ShapedString CreateShapedString(UltravioletFontFace fontFace, Int32 start, Int32 length, Int32 sourceIndexOffset = 0)
{
Contract.Require(fontFace, nameof(fontFace));
Contract.EnsureRange(start >= 0 && start < rawstr.Length, nameof(start));
Contract.EnsureRange(length >= 0 && start + length <= rawstr.Length, nameof(length));
Contract.EnsureNotDisposed(this, Disposed);
unsafe
{
Shape(fontFace, out var glyphInfo, out var glyphPosition, out var glyphCount);
var end = start + length;
var chars = new ShapedChar[glyphCount];
var charsCount = 0;
for (var i = 0; i < glyphCount; i++)
{
var cluster = (Int32)glyphInfo->cluster;
if (cluster >= start)
{
if (cluster >= end)
{
break;
}
switch (rawstr[cluster])
{
case '\n':
chars[i] = new ShapedChar('\n', sourceIndexOffset + cluster, Int16.MaxValue, Int16.MaxValue, Int16.MaxValue);
break;
case '\t':
chars[i] = new ShapedChar('\t', sourceIndexOffset + cluster, Int16.MaxValue, Int16.MaxValue, Int16.MaxValue);
break;
default:
CreateShapedChar(glyphInfo, glyphPosition, sourceIndexOffset + cluster, out chars[i]);
break;
}
charsCount++;
}
glyphInfo++;
glyphPosition++;
}
return(new ShapedString(fontFace, GetLanguage(), GetScript(), GetDirection(), chars, 0, charsCount));
}
}
public void ShapedString_ProvidesCorrectSourceIndices_WhenGivenAnExplicitOffset()
{
var sstr1 = default(ShapedString);
var sstr2 = default(ShapedString);
GivenAnUltravioletApplicationWithNoWindow()
.WithPlugin(new FreeTypeFontPlugin())
.WithContent(content =>
{
var font = content.Load <UltravioletFont>("Fonts/NotoColorEmoji");
using (var textShaper = new HarfBuzzTextShaper(content.Ultraviolet))
{
textShaper.SetUnicodeProperties(TextDirection.LeftToRight, TextScript.Latin, "en");
textShaper.Append("Hello, world!");
sstr1 = textShaper.CreateShapedString(font.Regular);
textShaper.Clear();
textShaper.Append(" Goodbye, world!");
sstr2 = textShaper.CreateShapedString(font.Regular, "Hello, world!".Length);
}
})
.RunForOneFrame();
var chars1 = new ShapedChar[sstr1.Length];
sstr1.CopyTo(0, chars1, 0, sstr1.Length);
var sourceIndices1 = chars1.Select(x => x.SourceIndex).ToArray();
TheResultingCollection(sourceIndices1)
.ShouldBeExactly(0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12);
var chars2 = new ShapedChar[sstr2.Length];
sstr2.CopyTo(0, chars2, 0, sstr2.Length);
var sourceIndices2 = chars2.Select(x => x.SourceIndex).ToArray();
TheResultingCollection(sourceIndices2)
.ShouldBeExactly(13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28);
}
public void ShapedString_ProvidesCorrectSourceIndices()
{
var sstr = default(ShapedString);
GivenAnUltravioletApplicationWithNoWindow()
.WithPlugin(new FreeTypeFontPlugin())
.WithContent(content =>
{
var font = content.Load <UltravioletFont>("Fonts/NotoColorEmoji");
using (var textShaper = new HarfBuzzTextShaper(content.Ultraviolet))
{
textShaper.SetUnicodeProperties(TextDirection.LeftToRight, TextScript.Latin, "en");
textShaper.Append("Hello ");
textShaper.Append("👨");
textShaper.Append("\u200D");
textShaper.Append("👩");
textShaper.Append("\u200D");
textShaper.Append("👧");
textShaper.Append("\u200D");
textShaper.Append("👦");
textShaper.Append("!");
sstr = textShaper.CreateShapedString(font.Regular);
}
})
.RunForOneFrame();
var chars = new ShapedChar[sstr.Length];
sstr.CopyTo(0, chars, 0, sstr.Length);
var sourceIndices = chars.Select(x => x.SourceIndex).ToArray();
TheResultingCollection(sourceIndices)
.ShouldBeExactly(0, 1, 2, 3, 4, 5, 6, 17);
}
