/// <summary>
/// Obtains bounding rectangle.
/// </summary>
/// <param name="range"></param>
/// <param name="min"></param>
/// <param name="max"></param>
public void GetBoundingRect(Vector2i range, out Vector2f min, out Vector2f max)
{
ValidateRange(range);
min = new Vector2f(float.PositiveInfinity, float.PositiveInfinity);
max = new Vector2f(float.NegativeInfinity, float.NegativeInfinity);
for (int i = range.X; i <= range.Y; i++)
{
RenderGlyphInfo info = glyphs[i];
Vector2f lb = info.LeftBottom, rt = lb + info.MultiSize;
if (lb.X < min.X)
{
min.X = lb.X;
}
if (lb.Y < min.Y)
{
min.Y = lb.Y;
}
if (rt.X > max.X)
{
max.X = rt.X;
}
if (rt.Y > max.Y)
{
max.Y = rt.Y;
}
}
}
/// <summary>
/// Constructs render info from lines.
/// </summary>
/// <param name="lines"></param>
public TextRenderInfo(ICanvas canvas, Font font,
float fontSize, params TextRenderLineInfo[] lines)
{
this.lines = lines;
// We extract glyphs.
List <RenderGlyphInfo> t = new List <RenderGlyphInfo>();
for (int i = 0; i < lines.Length; i++)
{
TextRenderLineInfo info = lines[i];
for (uint j = 0; j < info.GlyphCount; j++)
{
RenderGlyphInfo g = info[j];
t.Add(info[j]);
}
}
this.glyphs = t.ToArray();
// May adjust.
this.fullRange = new Vector2i(0, glyphs.Length - 1);
this.canvas = canvas;
this.font = font;
this.fontSize = fontSize;
}
/// <summary>
/// Translates text render information by vector.
/// </summary>
/// <param name="translateVector"></param>
public void Translate(Vector2f translateVector)
{
for (int i = 0; i < glyphs.Length; i++)
{
RenderGlyphInfo info = glyphs[i];
info.Adjust(translateVector);
}
// Must adjust line spans.
for (int i = 0; i < lines.Length; i++)
{
lines[i].AdjustSpan(translateVector.X);
}
}
/// <summary>
/// Render outlined characters.
/// </summary>
/// <param name="pen"></param>
/// <param name="range"></param>
public void Render(Pen pen, Vector2i range)
{
if (range.Y < range.X)
{
return;
}
ValidateRange(range);
canvas.Begin(CanvasRenderFlags.SoftwarePositionTransform);
try
{
for (int i = range.X; i <= range.Y; i++)
{
RenderGlyphInfo info = glyphs[i];
if (glyphs[i].RenderingData == null)
{
continue;
}
// We set transform.
canvas.Transform =
new LinearTransform(
Matrix4x4f.CreateTranslate(info.LeftBottom.Vec3) *
Matrix4x4f.CreateScale(new Vector3f(fontSize, fontSize, fontSize))
);
// We finally render.
TriangleSoup2f soup =
info.RenderingData.AcquireOutline(canvas.CanvasInfo.TesselationResolution,
pen.ToOutlineTesselationOptions(canvas.CanvasInfo));
canvas.FillShape(pen.Fill, soup, info.AttachedMapper);
}
}
finally
{
canvas.End();
}
}
/// <summary>
/// Prepares text for rendering, with rectange where data should be rendered.
/// </summary>
public TextRenderInfo Prepare(ICanvas canvas, string text, float fontSize,
TextOptions options, float lineSpacing, Vector2f leftBottom, Vector2f size)
{
// We extract information and convert them.
bool newLineOrdinary = HasFlag(options, TextOptions.NewLineOrdinary);
bool groupWords = HasFlag(options, TextOptions.NotGroupWords);
bool allowMulti = HasFlag(options, TextOptions.AllowMulticharacters);
if (!HasFlag(options, TextOptions.UseCanvasUnits))
{
// We use Y dimension, since it is primary axis for text (we want it properly aligned).
fontSize *= canvas.CanvasInfo.CanvasUnitSize.Y / canvas.CanvasInfo.CanvasPixelSize.Y;
}
lineSpacing *= fontSize;
// We go for each character.
float lineY = leftBottom.Y + size.Y - fontSize;
float lineX = leftBottom.X;
// Return data.
List <TextRenderLineInfo> lines = new List <TextRenderLineInfo>();
TextRenderLineInfo currentLine = new TextRenderLineInfo(
new Vector2f(leftBottom.X, leftBottom.X + size.X));
for (int i = 0; i < text.Length; i++)
{
// We first check for out of range.
if (lineY < leftBottom.Y)
{
break;
}
// We select next character.
int advIndex = 1;
Glyph obj = null;
// We find next glyph.
if (text[i] != '\n' || newLineOrdinary)
{
obj = SelectGlyph(text, i, out advIndex, allowMulti);
}
// We have it multiplied.
float adv = obj.Advance;
adv *= fontSize;
// We check for line fit.
if ((!newLineOrdinary && text[i] == '\n') || (lineX + adv >= leftBottom.X + size.X))
{
// We go to new line.
lines.Add(currentLine);
lineY -= lineSpacing;
lineX = leftBottom.X;
if (lineY < leftBottom.Y)
{
currentLine = null;
break;
}
else
{
i--;
currentLine = new TextRenderLineInfo(
new Vector2f(leftBottom.X, leftBottom.X + size.X));
continue;
}
}
// We advance and add it. We must carefully handle multi-char glyphs.
for (int j = 0; j < advIndex; j++)
{
// We create information.
RenderGlyphInfo info2 = new RenderGlyphInfo(
text[i + j], j == 0 ? text.Substring(i, advIndex) : string.Empty,
new Vector2f(lineX + j * (adv / advIndex), lineY), new Vector2f(adv / advIndex, fontSize),
j == 0 ? new Vector2f(adv, fontSize) : Vector2f.Zero, j == 0 ? obj : null, i + j);
currentLine.Append(info2);
}
// We advance.
lineX += adv;
}
if (currentLine != null)
{
lines.Add(currentLine);
}
TextRenderInfo info = new TextRenderInfo(canvas, this, fontSize, lines.ToArray());
// We now post-transform using flags.
if (HasFlag(options, TextOptions.Top))
{
// Already positioned.
}
else if (HasFlag(options, TextOptions.Bottom))
{
float disp = lines[lines.Count - 1].Bottom - leftBottom.Y;
info.Translate(new Vector2f(0, -disp));
}
else
{
// Center positioning.
float disp = (lines[lines.Count - 1].Bottom - leftBottom.Y) / 2.0f;
info.Translate(new Vector2f(0, -disp));
}
// We also align.
if (HasFlag(options, TextOptions.Left))
{
// Already aligned.
//info.LeftAlignLines();
}
else if (HasFlag(options, TextOptions.Right))
{
info.RightAlignLines();
}
else
{
info.CenterAlignLines();
}
return(info);
}
/// <summary>
/// Appends a glyph.
/// </summary>
/// <param name="info"></param>
public void Append(RenderGlyphInfo info)
{
glyphs.Add(info);
}
