/// <summary>
/// Draw a text primitive and merge the result to the text mesh.
/// </summary>
/// <param name="primitive"></param>
/// <param name="fontFamily">font file path</param>
/// <param name="fontSize">font pixel size</param>
/// <param name="fontColor">font color</param>
/// <param name="fontStyle">italic or normal. Oblique will not be supported for now.</param>
/// <param name="fontWeight">bold or normal.</param>
/// TODO apply text alignment
public void DrawText(TextPrimitive primitive, Rect rect, string fontFamily, double fontSize, Color fontColor,
FontStyle fontStyle, FontWeight fontWeight)
{
primitive.Offset = (Vector)rect.TopLeft;
//check if we need to rebuild the glyph data of this text primitive
var needRebuild = this.CheckTextPrimitive(primitive, fontFamily, fontSize, fontStyle, fontWeight);
//build text mesh
if (needRebuild)
{
primitive.FontFamily = fontFamily; //
primitive.FontSize = fontSize;
primitive.FontStyle = fontStyle; //No effect in current Typography.
primitive.FontWeight = fontWeight; //No effect in current Typography.
var textContext = new OSImplentation.TypographyTextContext(primitive.Text,
fontFamily,
(float)fontSize,
FontStretch.Normal,
fontStyle,
fontWeight,
(int)rect.Size.Width,
(int)rect.Size.Height,
TextAlignment.Leading);
textContext.Build((Point)primitive.Offset);
primitive.Offsets.AddRange(textContext.GlyphOffsets);
foreach (var character in primitive.Text)
{
if (char.IsWhiteSpace(character))
{
continue;
}
Typography.OpenFont.Glyph glyph = OSImplentation.TypographyTextContext.LookUpGlyph(fontFamily, character);
Typography.OpenFont.GlyphLoader.Read(glyph, out var polygons, out var bezierSegments);
var glyphData = GlyphCache.Default.GetGlyph(character, fontFamily, fontStyle, fontWeight);
if (glyphData == null)
{
glyphData = GlyphCache.Default.AddGlyph(character, fontFamily, fontStyle, fontWeight, polygons, bezierSegments);
}
Debug.Assert(glyphData != null);
primitive.Glyphs.Add(glyphData);
}
}
//FIXME Should each text segment consume a draw call? NO!
//add a new draw command
DrawCommand cmd = new DrawCommand();
cmd.ClipRect = Rect.Big;
cmd.TextureData = null;
this.TextMesh.Commands.Add(cmd);
var oldIndexBufferCount = this.TextMesh.IndexBuffer.Count;
var scale = OSImplentation.TypographyTextContext.GetScale(fontFamily, fontSize);
int index = -1;
// get glyph data from typeface
foreach (var character in primitive.Text)
{
if (char.IsWhiteSpace(character))
{
continue;
}
index++;
var glyphData = primitive.Glyphs[index];
Vector glyphOffset = primitive.Offsets[index];
this.TextMesh.Append(primitive.Offset, glyphData, glyphOffset, scale, fontColor, false);
}
var newIndexBufferCount = this.TextMesh.IndexBuffer.Count;
// Update command
var command = this.TextMesh.Commands[this.TextMesh.Commands.Count - 1];
command.ElemCount += newIndexBufferCount - oldIndexBufferCount;
this.TextMesh.Commands[this.TextMesh.Commands.Count - 1] = command;
}
/// <summary>
/// Draw a text primitive and merge the result to the text mesh.
/// </summary>
/// <param name="primitive"></param>
/// <param name="rect"></param>
/// <param name="style"></param>
public void DrawText(TextPrimitive primitive, Rect rect, StyleRuleSet style)
{
//check if we need to rebuild the glyph data of this text primitive
var needRebuild = this.CheckTextPrimitive(primitive, style);
var fontFamily = style.FontFamily;
var fontSize = style.FontSize;
var fontColor = style.FontColor;
//build text mesh
if (needRebuild)
{
primitive.Glyphs.Clear();
primitive.Offsets.Clear();
primitive.FontSize = fontSize;
primitive.FontFamily = fontFamily;
primitive.FontStyle = style.FontStyle;
primitive.FontWeight = style.FontWeight;
var fontStretch = FontStretch.Normal;
var fontStyle = style.FontStyle;
var fontWeight = style.FontWeight;
var textAlignment = (TextAlignment)style.Get <int>(GUIStyleName.TextAlignment);//TODO apply text alignment
var textContext = new OSImplentation.TypographyTextContext(primitive.Text,
fontFamily,
fontSize,
fontStretch,
fontStyle,
fontWeight,
(int)rect.Size.Width,
(int)rect.Size.Height,
textAlignment);
textContext.Build(rect.Location);
primitive.Offsets.AddRange(textContext.GlyphOffsets);
foreach (var character in primitive.Text)
{
Typography.OpenFont.Glyph glyph = OSImplentation.TypographyTextContext.LookUpGlyph(fontFamily, character);
Typography.OpenFont.GlyphLoader.Read(glyph, out var polygons, out var bezierSegments);
var glyphData = GlyphCache.Default.GetGlyph(character, fontFamily, fontStyle, fontWeight);
if (glyphData == null)
{
glyphData = GlyphCache.Default.AddGlyph(character, fontFamily, fontStyle, fontWeight, polygons, bezierSegments);
}
Debug.Assert(glyphData != null);
primitive.Glyphs.Add(glyphData);
}
}
//FIXME Should each text segment consume a draw call? NO!
//add a new draw command
DrawCommand cmd = new DrawCommand();
cmd.ClipRect = Rect.Big;
cmd.TextureData = null;
this.TextMesh.Commands.Add(cmd);
var oldIndexBufferCount = this.TextMesh.IndexBuffer.Count;
var scale = OSImplentation.TypographyTextContext.GetScale(fontFamily, fontSize);
int index = -1;
// get glyph data from typeface
foreach (var character in primitive.Text)
{
index++;
var glyphData = primitive.Glyphs[index];
Vector glyphOffset = primitive.Offsets[index];
this.TextMesh.Append((Vector)rect.Location + primitive.Offset, glyphData, glyphOffset, scale, fontColor, false);
}
var newIndexBufferCount = this.TextMesh.IndexBuffer.Count;
// Update command
var command = this.TextMesh.Commands[this.TextMesh.Commands.Count - 1];
command.ElemCount += newIndexBufferCount - oldIndexBufferCount;
this.TextMesh.Commands[this.TextMesh.Commands.Count - 1] = command;
}