protected void ShapeGlyphRun(TextAnalyzer textAnalyzer, int runIndex, ref int glyphStart)
{
// Shapes a single run of text into glyphs.
// Alternately, you could iteratively interleave shaping and line
// breaking to reduce the number glyphs held onto at once. It's simpler
// for this demostration to just do shaping and line breaking as two
// separate processes, but realize that this does have the consequence that
// certain advanced fonts containing line specific features (like Gabriola)
// will shape as if the line is not broken.
Run run = runs_[runIndex];
int textStart = run.textStart;
int textLength = run.textLength;
int maxGlyphCount = glyphIndices_.Length - glyphStart;
int actualGlyphCount = 0;
run.glyphStart = glyphStart;
run.glyphCount = 0;
if (textLength == 0)
return;// Nothing to do..
// Allocate space for shaping to fill with glyphs and other information,
// with about as many glyphs as there are text characters. We'll actually
// need more glyphs than codepoints if they are decomposed into separate
// glyphs, or fewer glyphs than codepoints if multiple are substituted
// into a single glyph. In any case, the shaping process will need some
// room to apply those rules to even make that determintation.
if (textLength > maxGlyphCount)
{
maxGlyphCount = EstimateGlyphCount(textLength);
int totalGlyphsArrayCount = glyphStart + maxGlyphCount;
short[] Resized_glyphIndices_ = new short[totalGlyphsArrayCount];
glyphIndices_.CopyTo(Resized_glyphIndices_, 0);
glyphIndices_ = Resized_glyphIndices_;
}
ShapingTextProperties[] textProps = new ShapingTextProperties[textLength];
ShapingGlyphProperties[] glyphProps = new ShapingGlyphProperties[maxGlyphCount];
// Get the glyphs from the text, retrying if needed.
int tries = 0;
while (tries < 2)// We'll give it two chances.
{
short[] call_glyphClusters_ = new short[glyphClusters_.Length - textStart];
short[] call_glyphIndices_ = new short[glyphIndices_.Length - glyphStart];
bool isDone = false;
try
{
textAnalyzer.GetGlyphs(
text_.Substring(textStart, textLength),
textLength,
fontFace_,
run.isSideways,
(run.bidiLevel % 2 == 1),
run.script,
localName_,
run.isNumberSubstituted ? numberSubstitution_ : null,
null,
null,
maxGlyphCount,
call_glyphClusters_,
textProps,
call_glyphIndices_,
glyphProps,
out actualGlyphCount);
Array.Copy(call_glyphClusters_, 0, glyphClusters_, textStart, call_glyphClusters_.Length);
Array.Copy(call_glyphIndices_, 0, glyphIndices_, glyphStart, call_glyphIndices_.Length);
isDone = true;
}
finally
{
tries++;
// Try again using a larger buffer.
maxGlyphCount = EstimateGlyphCount(maxGlyphCount);
int totalGlyphsArrayCount = glyphStart + maxGlyphCount;
glyphProps = new ShapingGlyphProperties[maxGlyphCount];
glyphIndices_ = new short[totalGlyphsArrayCount];
}
if (isDone)
break;
}
// Get the placement of the all the glyphs.
if (glyphAdvances_.Length < glyphStart + actualGlyphCount)
{
float[] Resized_glyphAdvances_ = new float[glyphStart + actualGlyphCount];
glyphAdvances_.CopyTo(Resized_glyphAdvances_, 0);
glyphAdvances_ = Resized_glyphAdvances_;
}
if (glyphOffsets_.Length < glyphStart + actualGlyphCount)
{
GlyphOffset[] Resized_glyphOffsets_ = new GlyphOffset[glyphStart + actualGlyphCount];
glyphOffsets_.CopyTo(Resized_glyphOffsets_, 0);
glyphOffsets_ = Resized_glyphOffsets_;
}
short[] call2_glyphClusters_ = new short[glyphClusters_.Length - textStart];
Array.Copy(glyphClusters_, textStart, call2_glyphClusters_, 0, call2_glyphClusters_.Length);
short[] call2_glyphIndices_ = new short[glyphIndices_.Length - glyphStart];
Array.Copy(glyphIndices_, glyphStart, call2_glyphIndices_, 0, call2_glyphIndices_.Length);
float[] call2_glyphAdvances_ = new float[glyphAdvances_.Length - glyphStart];
Array.Copy(glyphAdvances_, glyphStart, call2_glyphAdvances_, 0, call2_glyphAdvances_.Length);
GlyphOffset[] call2_glyphOffsets_ = new GlyphOffset[glyphOffsets_.Length - glyphStart];
Array.Copy(glyphOffsets_, glyphStart, call2_glyphOffsets_, 0, call2_glyphOffsets_.Length);
textAnalyzer.GetGlyphPlacements(
text_.Substring(textStart, textLength),
call2_glyphClusters_,
textProps,
textLength,
call2_glyphIndices_,
glyphProps,
actualGlyphCount,
fontFace_,
fontEmSize_,
run.isSideways,
run.bidiLevel % 2 == 1,
run.script,
localName_,
null,
null,
call2_glyphAdvances_,
call2_glyphOffsets_);
//call2_glyphClusters_.CopyTo(glyphClusters_, textStart);
call2_glyphAdvances_.CopyTo(glyphAdvances_, glyphStart);
call2_glyphOffsets_.CopyTo(glyphOffsets_, glyphStart);
// Certain fonts, like Batang, contain glyphs for hidden control
// and formatting characters. So we'll want to explicitly force their
// advance to zero.
if (run.script.Shapes == ScriptShapes.NoVisual)
{
for (int i = glyphStart; i < glyphStart + actualGlyphCount; i++)
glyphAdvances_[i] = 0;
}
// Set the final glyph count of this run and advance the starting glyph.
run.glyphCount = actualGlyphCount;
runs_[runIndex] = run;
glyphStart += actualGlyphCount;
}
/// <inheritdoc />
protected override void Draw()
{
while (this.pendingActions.TryDequeue(out var action))
{
action();
}
var args = this.neovimClient.GetScreen();
if (args == null)
{
return;
}
this.scriptAnalysesCache.StartNewFrame();
this.DeviceContext.BeginDraw();
this.DeviceContext.Clear(Helpers.GetColor(args.BackgroundColor, 0));
// Paint the background
for (int i = 0; i < args.Cells.GetLength(0); i++)
{
for (int j = 0; j < args.Cells.GetLength(1); j++)
{
if (args.Cells[i, j].BackgroundColor != args.BackgroundColor || args.Cells[i, j].Reverse)
{
var x = j * this.textParam.CharWidth;
var y = i * this.textParam.LineHeight;
var rect = new RawRectangleF(x, y, x + this.textParam.CharWidth, y + this.textParam.LineHeight);
int color = args.Cells[i, j].Reverse ? args.Cells[i, j].ForegroundColor : args.Cells[i, j].BackgroundColor;
var brush = this.brushCache.GetBrush(this.DeviceContext, color);
this.DeviceContext.FillRectangle(rect, brush);
}
}
}
// Paint the foreground
for (int i = 0; i < args.Cells.GetLength(0); i++)
{
int j = 0;
while (j < args.Cells.GetLength(1))
{
// Cells with the same style should be analyzed together.
// This prevents the inproper ligature in <html>=
// Of course, it relies on enabling the syntax.
int cellRangeStart = j;
int cellRangeEnd = j;
Cell startCell = args.Cells[i, cellRangeStart];
while (true)
{
if (cellRangeEnd == args.Cells.GetLength(1))
{
break;
}
Cell cell = args.Cells[i, cellRangeEnd];
if (cell.Character != null &&
(cell.ForegroundColor != startCell.ForegroundColor ||
cell.BackgroundColor != startCell.BackgroundColor ||
cell.SpecialColor != startCell.SpecialColor ||
cell.Italic != startCell.Italic ||
cell.Bold != startCell.Bold ||
cell.Reverse != startCell.Reverse ||
cell.Undercurl != startCell.Undercurl ||
cell.Underline != startCell.Underline))
{
break;
}
cellRangeEnd++;
}
j = cellRangeEnd;
var fontWeight = args.Cells[i, cellRangeStart].Bold ? DWrite.FontWeight.Bold : this.textParam.Weight;
var fontStyle = args.Cells[i, cellRangeStart].Italic ? DWrite.FontStyle.Italic : this.textParam.Style;
int cellIndex = cellRangeStart;
using (var textSource = new RowTextSource(this.factoryDWrite, args.Cells, i, cellRangeStart, cellRangeEnd))
{
var scriptAnalyses = this.scriptAnalysesCache.GetOrAddAnalysisResult(
textSource.GetTextAtPosition(0),
(_) =>
{
using (var textSink = new TextAnalysisSink())
{
this.textAnalyzer.AnalyzeScript(textSource, 0, textSource.Length, textSink);
return(textSink.ScriptAnalyses);
}
});
// The result of AalyzeScript may cut the text into several ranges,
// and in each range the text's scripts are different.
foreach (var(codePointStart, codePointLength, scriptAnalysis) in scriptAnalyses)
{
var glyphBufferLength = (codePointLength * 3 / 2) + 16;
var clusterMap = new short[codePointLength];
var textProperties = new DWrite.ShapingTextProperties[codePointLength];
short[] indices;
DWrite.ShapingGlyphProperties[] shapingProperties;
var fontFace = this.fontCache.GetPrimaryFontFace(fontWeight, fontStyle);
int actualGlyphCount;
// We don't know how many glyphs the text have. TextLength * 3 / 2 + 16
// is an empirical estimation suggested by MSDN. So using a loop to detect
// the actual glyph count.
while (true)
{
indices = new short[glyphBufferLength];
shapingProperties = new DWrite.ShapingGlyphProperties[glyphBufferLength];
try
{
var str = textSource.GetSubString(codePointStart, codePointLength);
DWrite.FontFeature[][] fontFeatures = null;
int[] featureLength = null;
if (!this.EnableLigature)
{
fontFeatures = new DWrite.FontFeature[][]
{
new DWrite.FontFeature[]
{
new DWrite.FontFeature(DWrite.FontFeatureTag.StandardLigatures, 0),
},
};
featureLength = new int[]
{
str.Length,
};
}
this.textAnalyzer.GetGlyphs(
str,
str.Length,
fontFace,
false,
false,
scriptAnalysis,
null,
null,
fontFeatures,
featureLength,
glyphBufferLength,
clusterMap,
textProperties,
indices,
shapingProperties,
out actualGlyphCount);
break;
}
catch (SharpDX.SharpDXException e)
{
const int ERROR_INSUFFICIENT_BUFFER = 122;
if (e.ResultCode == SharpDX.Result.GetResultFromWin32Error(ERROR_INSUFFICIENT_BUFFER))
{
glyphBufferLength *= 2;
}
}
}
for (int codePointIndex = 0, glyphIndex = 0; codePointIndex < codePointLength;)
{
// var fontWeight = args.Screen[i, cellIndex].Bold ? DWrite.FontWeight.Bold : DWrite.FontWeight.Normal;
// var fontStyle = args.Screen[i, cellIndex].Italic ? DWrite.FontStyle.Italic : DWrite.FontStyle.Normal;
var foregroundColor = args.Cells[i, cellIndex].Reverse ? args.Cells[i, cellIndex].BackgroundColor : args.Cells[i, cellIndex].ForegroundColor;
var foregroundBrush = this.brushCache.GetBrush(this.DeviceContext, foregroundColor);
var fontFace2 = fontFace;
short[] indices2;
int cellWidth = 0;
int codePointCount = 0;
int glyphCount = 0;
if (indices[glyphIndex] == 0)
{
// If the primary font doesn't have the glyph, get a font from system font fallback.
// Ligatures for fallback fonts are not supported yet.
int codePoint = args.Cells[i, cellIndex].Character.Value;
fontFace2 = this.fontCache.GetFontFace(codePoint, fontWeight, fontStyle);
indices2 = fontFace2.GetGlyphIndices(new int[] { codePoint });
glyphCount = indices2.Length;
// NativeInterop.Methods.wcwidth(textSource.GetCodePoint(codePointStart + codePointIndex));
cellWidth = this.GetCharWidth(args.Cells, i, cellIndex);
codePointCount = 1;
}
else
{
// The cluster map stores the information about the codepoint-glyph mapping.
// If several codepoints share the same glyph (e.g. ligature), then they will
// have the same value in clusterMap.
// If one code point has several corresponding glyphs, then for the next codepoint,
// the value in clusterMap will bump higher.
// Example: CodePointLength = 5, GlyphCount = 5, clusterMap = [0, 1, 1, 2, 4] means:
// Codepoint Index Glyph Index
// 0 ----------- 0
// 1 ----------- 1
// 2 ----------/
// 3 ----------- 2
// \---------- 3
// 4 ----------- 4
var cluster = clusterMap[codePointIndex];
int nextCluster = cluster;
while (true)
{
if (codePointIndex + codePointCount == clusterMap.Length)
{
nextCluster++;
break;
}
nextCluster = clusterMap[codePointIndex + codePointCount];
if (cluster != nextCluster)
{
break;
}
// NativeInterop.Methods.wcwidth(textSource.GetCodePoint(codePointStart + codePointIndex + codePointCount));
cellWidth += this.GetCharWidth(args.Cells, i, cellIndex + cellWidth);
codePointCount++;
}
glyphCount = nextCluster - cluster;
indices2 = new short[glyphCount];
for (int c = 0; c < glyphCount; c++)
{
indices2[c] = indices[glyphIndex];
}
}
using (var glyphrun = new DWrite.GlyphRun
{
FontFace = fontFace2,
Advances = null,
BidiLevel = 0,
FontSize = this.textParam.DipSize,
Indices = indices2,
IsSideways = false,
Offsets = null,
})
{
var origin = new RawVector2(this.textParam.CharWidth * cellIndex, this.textParam.LineHeight * (i + 0.8f));
this.DeviceContext.DrawGlyphRun(origin, glyphrun, foregroundBrush, D2D.MeasuringMode.GdiNatural);
glyphrun.FontFace = null;
}
cellIndex += cellWidth;
codePointIndex += codePointCount;
glyphIndex += glyphCount;
}
}
}
}
}
this.DeviceContext.EndDraw();
this.DrawCursor(args);
}