public override void DrawFromGlyphPlans(GlyphPlanSequence seq, int startAt, int len, float x, float y)
{
UpdateVisualOutputSettings();
//draw data in glyph plan
//3. render each glyph
float sizeInPoints = this.FontSizeInPoints;
float pxscale = _currentTypeface.CalculateScaleToPixelFromPointSize(sizeInPoints);
//
_glyphMeshCollections.SetCacheInfo(this.Typeface, sizeInPoints, this.HintTechnique);
//this draw a single line text span***
Graphics g = this.TargetGraphics;
float cx = 0;
float cy = 0;
float baseline = y;
var snapToPxScale = new GlyphPlanSequenceSnapPixelScaleLayout(seq, startAt, len, pxscale);
while (snapToPxScale.Read())
{
if (!_glyphMeshCollections.TryGetCacheGlyph(snapToPxScale.CurrentGlyphIndex, out GraphicsPath foundPath))
{
//if not found then create a new one
_currentGlyphPathBuilder.BuildFromGlyphIndex(snapToPxScale.CurrentGlyphIndex, sizeInPoints);
_txToGdiPath.Reset();
_currentGlyphPathBuilder.ReadShapes(_txToGdiPath);
foundPath = _txToGdiPath.ResultGraphicsPath;
//register
_glyphMeshCollections.RegisterCachedGlyph(snapToPxScale.CurrentGlyphIndex, foundPath);
}
//------
//then move pen point to the position we want to draw a glyph
cx = (float)Math.Round(snapToPxScale.ExactX + x);
cy = (float)Math.Floor(snapToPxScale.ExactY + baseline);
g.TranslateTransform(cx, cy);
if (FillBackground)
{
g.FillPath(_fillBrush, foundPath);
}
if (DrawOutline)
{
g.DrawPath(_outlinePen, foundPath);
}
//and then we reset back ***
g.TranslateTransform(-cx, -cy);
}
}
} // End Function GetExistingOrCreateGraphicsPath
// public override void DrawFromGlyphPlans(GlyphPlanSequence glyphPlanList, int startAt, int len, float left, float top)
public override void DrawFromGlyphPlans(GlyphPlanSequence seq, int startAt, int len, float x, float y)
{
UpdateVisualOutputSettings();
//draw data in glyph plan
//3. render each glyph
float sizeInPoints = this.FontSizeInPoints;
float pxscale = _currentTypeface.CalculateScaleToPixelFromPointSize(sizeInPoints);
Typeface typeface = this.Typeface;
_glyphMeshCollections.SetCacheInfo(typeface, sizeInPoints, this.HintTechnique);
//this draw a single line text span***
SvgGraphics g = this.TargetGraphics;
float baseline = y;
GlyphPlanSequenceSnapPixelScaleLayout snapToPxScale =
new GlyphPlanSequenceSnapPixelScaleLayout(seq, startAt, len, pxscale);
COLR colrTable = typeface.COLRTable;
CPAL cpalTable = typeface.CPALTable;
bool canUseColorGlyph = EnableColorGlyph && colrTable != null && cpalTable != null;
while (snapToPxScale.Read())
{
ushort glyphIndex = snapToPxScale.CurrentGlyphIndex;
if (canUseColorGlyph && colrTable.LayerIndices.TryGetValue(glyphIndex, out ushort colorLayerStart))
{
ushort colorLayerCount = colrTable.LayerCounts[glyphIndex];
for (int c = colorLayerStart; c < colorLayerStart + colorLayerCount; ++c)
{
SvgPath path = GetExistingOrCreateGraphicsPath(colrTable.GlyphLayers[c]);
if (path == null)
{
#if DEBUG
System.Diagnostics.Debug.WriteLine("gdi_printer: no path?");
#endif
continue;
} // End if (path == null)
//then move pen point to the position we want to draw a glyph
float cx = (float)System.Math.Round(snapToPxScale.ExactX + x);
float cy = (float)System.Math.Floor(snapToPxScale.ExactY + baseline);
int palette = 0; // FIXME: assume palette 0 for now
cpalTable.GetColor(
cpalTable.Palettes[palette] + colrTable.GlyphPalettes[c], //index
out byte red, out byte green, out byte blue, out byte alpha);
g.TranslateTransform(cx, cy);
_fillBrush.Color = SvgColor.ToWebRgb(red, green, blue);
if (FillBackground)
{
g.FillPath(_fillBrush, path);
}
if (DrawOutline)
{
g.DrawPath(_outlinePen, path);
}
// and then we reset back
g.TranslateTransform(-cx, -cy);
} // Next c
}
else
{
SvgPath path = GetExistingOrCreateGraphicsPath(glyphIndex);
if (path == null)
{
#if DEBUG
System.Diagnostics.Debug.WriteLine("gdi_printer: no path?");
#endif
continue;
}
//------
//then move pen point to the position we want to draw a glyph
float cx = (float)System.Math.Round(snapToPxScale.ExactX + x);
float cy = (float)System.Math.Floor(snapToPxScale.ExactY + baseline);
g.TranslateTransform(cx, cy);
if (FillBackground)
{
g.FillPath(_fillBrush, path);
}
if (DrawOutline)
{
g.DrawPath(_outlinePen, path);
}
// and then we reset back
g.TranslateTransform(-cx, -cy);
} // End else
} // Whend
} // End Sub DrawFromGlyphPlans
public override void DrawFromGlyphPlans(GlyphPlanSequence seq, int startAt, int len, float left, float top)
{
if (StartDrawOnLeftTop)
{
//version 2
//offset y down
top += this.FontLineSpacingPx;
}
float fontSizePoint = this.FontSizeInPoints;
float scale = _currentTypeface.CalculateScaleToPixelFromPointSize(fontSizePoint);
//4. render each glyph
float ox = _painter.OriginX;
float oy = _painter.OriginY;
Typography.OpenFont.Tables.COLR colrTable = _currentTypeface.COLRTable;
Typography.OpenFont.Tables.CPAL cpalTable = _currentTypeface.CPALTable;
bool hasColorGlyphs = (colrTable != null) && (cpalTable != null);
//---------------------------------------------------
_glyphMeshStore.SetHintTechnique(this.HintTechnique);
_glyphMeshStore.SetFont(_currentTypeface, fontSizePoint);
_glyphMeshStore.SimulateOblique = this.SimulateSlant;
//---------------------------------------------------
if (_currentTypeface.HasSvgTable())
{
_glyphSvgStore.SetCurrentTypeface(_currentTypeface);
int seqLen = seq.Count;
if (len > seqLen)
{
len = seqLen;
}
var snapToPx = new GlyphPlanSequenceSnapPixelScaleLayout(seq, startAt, len, scale);
while (snapToPx.Read())
{
_painter.SetOrigin((float)Math.Round(left + snapToPx.ExactX) + 0.33f, (float)Math.Floor(top + snapToPx.ExactY));
GlyphBitmap glyphBmp = _glyphSvgStore.GetGlyphBitmap(snapToPx.CurrentGlyphIndex);
//how to draw the image
//1.
if (glyphBmp != null)
{
_painter.DrawImage(glyphBmp.Bitmap);
}
}
}
else if (_currentTypeface.IsBitmapFont)
{
//check if we have exported all the glyph bitmap
//to some 'ready' form?
//if not then create it
_glyphBitmapStore.SetCurrentTypeface(_currentTypeface);
int seqLen = seq.Count;
if (len > seqLen)
{
len = seqLen;
}
var snapToPx = new GlyphPlanSequenceSnapPixelScaleLayout(seq, startAt, len, scale);
while (snapToPx.Read())
{
_painter.SetOrigin((float)Math.Round(left + snapToPx.ExactX) + 0.33f, (float)Math.Floor(top + snapToPx.ExactY));
GlyphBitmap glyphBmp = _glyphBitmapStore.GetGlyphBitmap(snapToPx.CurrentGlyphIndex);
//how to draw the image
//1.
_painter.DrawImage(glyphBmp.Bitmap);
}
}
else
{
if (!hasColorGlyphs)
{
bool savedUseLcdMode = _painter.UseSubPixelLcdEffect; //save,restore later
RenderQuality savedRederQuality = _painter.RenderQuality;
_painter.RenderQuality = RenderQuality.HighQuality;
_painter.UseSubPixelLcdEffect = true;
int seqLen = seq.Count;
if (len > seqLen)
{
len = seqLen;
}
var snapToPx = new GlyphPlanSequenceSnapPixelScaleLayout(seq, startAt, len, scale);
while (snapToPx.Read())
{
_painter.SetOrigin((float)Math.Round(left + snapToPx.ExactX) + 0.33f, (float)Math.Floor(top + snapToPx.ExactY));
_painter.Fill(_glyphMeshStore.GetGlyphMesh(snapToPx.CurrentGlyphIndex));
}
//restore
_painter.RenderQuality = savedRederQuality;
_painter.UseSubPixelLcdEffect = savedUseLcdMode;
}
else
{
//-------------
//this glyph has color information
//-------------
Color originalFillColor = _painter.FillColor;
int seqLen = seq.Count;
if (len > seqLen)
{
len = seqLen;
}
var snapToPx = new GlyphPlanSequenceSnapPixelScaleLayout(seq, startAt, len, scale);
while (snapToPx.Read())
{
_painter.SetOrigin((float)Math.Round(left + snapToPx.ExactX), (float)Math.Floor(top + snapToPx.ExactY));
ushort colorLayerStart;
if (colrTable.LayerIndices.TryGetValue(snapToPx.CurrentGlyphIndex, out colorLayerStart))
{
//TODO: optimize this
//we found color info for this glyph
ushort colorLayerCount = colrTable.LayerCounts[snapToPx.CurrentGlyphIndex];
byte r, g, b, a;
for (int c = colorLayerStart; c < colorLayerStart + colorLayerCount; ++c)
{
ushort gIndex = colrTable.GlyphLayers[c];
int palette = 0; // FIXME: assume palette 0 for now
cpalTable.GetColor(
cpalTable.Palettes[palette] + colrTable.GlyphPalettes[c], //index
out r, out g, out b, out a);
//-----------
_painter.FillColor = new Color(r, g, b);//? a component
_painter.Fill(_glyphMeshStore.GetGlyphMesh(gIndex));
}
}
else
{
//-----------------------------------
//TODO: review here ***
//PERFORMANCE revisit here
//if we have create a vxs we can cache it for later use?
//-----------------------------------
_painter.Fill(_glyphMeshStore.GetGlyphMesh(snapToPx.CurrentGlyphIndex));
}
}
_painter.FillColor = originalFillColor; //restore color
}
}
//restore prev origin
_painter.SetOrigin(ox, oy);
}
void RenderAndShowMeasureBox()
{
bool flipY = chkFlipY.Checked;
//set some Gdi+ props...
_g.SmoothingMode = System.Drawing.Drawing2D.SmoothingMode.HighQuality;
_g.Clear(Color.White);
Typography.OpenFont.Typeface typeface = _currentTextPrinter.Typeface;
Typography.OpenFont.Extensions.TypefaceExtensions.UpdateAllCffGlyphBounds(typeface);
float pxscale = typeface.CalculateScaleToPixelFromPointSize(_currentTextPrinter.FontSizeInPoints);
int lineSpacing = (int)System.Math.Ceiling((double)typeface.CalculateLineSpacing(LineSpacingChoice.TypoMetric) * pxscale);
if (flipY)
{
//credit:
//http://stackoverflow.com/questions/1485745/flip-coordinates-when-drawing-to-control
_g.ScaleTransform(1.0F, -1.0F); // Flip the Y-Axis
_g.TranslateTransform(0.0F, -500); // Translate the drawing area accordingly
}
//--------------------------------
//textspan measurement sample
//--------------------------------
_currentTextPrinter.HintTechnique = (HintTechnique)lstHintList.SelectedItem;
_currentTextPrinter.PositionTechnique = (PositionTechnique)cmbPositionTech.SelectedItem;
_currentTextPrinter.UpdateGlyphLayoutSettings();
//render at specific pos
float x_pos = 0, y_pos = lineSpacing * 2;
char[] textBuffer = txtInputChar.Text.ToCharArray();
//Example 1: this is a basic draw sample
_currentTextPrinter.FillColor = Color.Black;
_currentTextPrinter.TargetGraphics = _g;
//_currentTextPrinter.DrawString(
// textBuffer,
// 0,
// textBuffer.Length,
// x_pos,
// y_pos
// );
//
//--------------------------------------------------
//Example 2: print glyph plan to 'user' list-> then draw it (or hold it/ not draw)
//you can create you own class to hold userGlyphPlans.***
//2.1
if (chkEnableMultiTypefaces.Checked)
{
_ftmGlyphPlansList.Clear();
_currentTextPrinter.GenerateGlyphPlans(textBuffer, 0, textBuffer.Length, _ftmGlyphPlansList);
//2.2
//and we can print the formatted glyph plan later.
y_pos -= lineSpacing;//next line
_currentTextPrinter.FillColor = Color.Red;
_currentTextPrinter.DrawFromFormattedGlyphPlans(
_ftmGlyphPlansList,
x_pos,
y_pos
);
//--------------------------------------------------
//Example 3: MeasureString
//3.1 use data in formatted_glyph_plan_list to measure string => OK, OR
//3.2 use another 'light-weight' text printer to measure string (without drawing actual string)
//3.1
_currentTextPrinter.MeasureGlyphPlanList(_ftmGlyphPlansList, out int measureWidth);
_g.DrawRectangle(Pens.Red, x_pos, y_pos, measureWidth, 30);
float baseline = y_pos;
//3.2 draw each glyph bounds
{
int m = _ftmGlyphPlansList.Count;
for (int i = 0; i < m; ++i)
{
FormattedGlyphPlanSeq seq = _ftmGlyphPlansList[i];
ResolvedFont resolvedFont = seq.ResolvedFont;
Typeface localTypeface = resolvedFont.Typeface;
pxscale = resolvedFont.GetScaleToPixelFromPointInSize();
GlyphPlanSequence glyph_seq = seq.Seq;
var snapToPxScale = new GlyphPlanSequenceSnapPixelScaleLayout(seq.Seq, 0, glyph_seq.Count, pxscale);
x_pos += (resolvedFont.WhitespaceWidth * seq.PrefixWhitespaceCount);
int nn = 0;///
while (snapToPxScale.Read())
{
//float cx = (float)Math.Round(snapToPxScale.ExactX + x_pos);
//float cy = (float)Math.Floor(snapToPxScale.ExactY + baseline);
UnscaledGlyphPlan glyphPlan = glyph_seq[nn];
Glyph glyph = localTypeface.GetGlyph(glyphPlan.glyphIndex);
Bounds b = glyph.Bounds;
//
float xmin = b.XMin * pxscale;
float ymin = b.YMin * pxscale;
//
float xmax = b.XMax * pxscale;
float ymax = b.YMax * pxscale;
//
float glyph_x = x_pos + (glyphPlan.OffsetX * pxscale);
_g.DrawRectangle(Pens.Red, glyph_x + xmin, y_pos + ymin, xmax - xmin, ymax - ymin);
x_pos += glyphPlan.AdvanceX * pxscale;
nn++;
}
x_pos += (resolvedFont.WhitespaceWidth * seq.PostfixWhitespaceCount);
}
}
_ftmGlyphPlansList.Clear();
}
else
{
_reusableUnscaledGlyphPlanList.Clear();
_currentTextPrinter.GenerateGlyphPlans(textBuffer, 0, textBuffer.Length, _reusableUnscaledGlyphPlanList);
//2.2
//and we can print the formatted glyph plan later.
y_pos -= lineSpacing;//next line
_currentTextPrinter.FillColor = Color.Red;
//
GlyphPlanSequence seq = new GlyphPlanSequence(_reusableUnscaledGlyphPlanList);
_currentTextPrinter.DrawFromGlyphPlans(
seq,
x_pos,
y_pos
);
//--------------------------------------------------
//Example 3: MeasureString
float descending_px = _currentTextPrinter.FontDescedingPx;
float ascending_px = _currentTextPrinter.FontAscendingPx;
float lineSpacing_px = _currentTextPrinter.FontLineSpacingPx;
float clippedHeight_px = _currentTextPrinter.FontClipHeightPx;
_currentTextPrinter.MeasureGlyphPlanSeq(seq, out int textspanW);
UnscaledGlyphPlanList glyphPlans = new UnscaledGlyphPlanList();
_currentTextPrinter.GenerateGlyphPlans(textBuffer, 0, textBuffer.Length, glyphPlans);
int j = glyphPlans.Count;
float backup_xpos = x_pos;
for (int i = 0; i < j; ++i)
{
UnscaledGlyphPlan glyphPlan = glyphPlans[i];
Glyph glyph = typeface.GetGlyph(glyphPlan.glyphIndex);
//
Bounds b = glyph.Bounds;
//
float xmin = b.XMin * pxscale;
float ymin = b.YMin * pxscale;
//
float xmax = b.XMax * pxscale;
float ymax = b.YMax * pxscale;
//
float glyph_x = x_pos + (glyphPlan.OffsetX * pxscale);
_g.DrawRectangle(Pens.Red, glyph_x + xmin, y_pos + ymin, xmax - xmin, ymax - ymin);
x_pos += glyphPlan.AdvanceX * pxscale;
}
x_pos = backup_xpos;
_g.FillRectangle(Brushes.Red, new RectangleF(0, 0, 5, 5));//reference point(0,0)
_g.FillRectangle(Brushes.Green, new RectangleF(x_pos, y_pos, 3, 3));
float x_pos2 = x_pos + textspanW + 10;
_g.DrawRectangle(Pens.Black, x_pos, y_pos + descending_px, textspanW, clippedHeight_px);
_g.DrawRectangle(Pens.Red, x_pos, y_pos + descending_px, textspanW, lineSpacing_px);
_g.DrawLine(Pens.Blue, x_pos, y_pos, x_pos2, y_pos); //baseline
_g.DrawLine(Pens.Green, x_pos, y_pos + descending_px, x_pos2, y_pos + descending_px); //descending
_g.DrawLine(Pens.Magenta, x_pos, y_pos + ascending_px, x_pos2, y_pos + ascending_px); //ascending
////------------
////draw another line (for reference)
y_pos -= lineSpacing;//next line
_currentTextPrinter.FillColor = Color.Black;
_currentTextPrinter.DrawFromGlyphPlans(
new GlyphPlanSequence(_reusableUnscaledGlyphPlanList),
x_pos,
y_pos
);
}
//transform back
if (flipY)
{
_g.ScaleTransform(1.0F, -1.0F); // Flip the Y-Axis
_g.TranslateTransform(0.0F, -500); // Translate the drawing area accordingly
}
//---------
//txtMsgInfo.Text = "choice:" + choice.ToString() + "=" + lineSpacing.ToString();
}
