private void IterateString(string text, STRVector position, bool draw, float scale, STRColor color, CoordinateType coordinateType, out StringMetrics metrics)
{
metrics = new StringMetrics();
STRVector startPosition = position;
float scalY = coordinateType == SpriteTextRenderer.CoordinateType.SNorm ? -1 : 1;
string visualText = NBidi.NBidi.LogicalToVisual(text);
int[] codePoints = Helpers.ConvertToCodePointArray(visualText);
foreach (int c in codePoints)
{
var charDesc = GetCharDescription(c);
var charMetrics = charDesc.ToStringMetrics(position, scale, scale * scalY);
if (draw)
{
if (charMetrics.FullRectSize.X != 0 && charMetrics.FullRectSize.Y != 0)
{
float posY = position.Y - scalY * charMetrics.OverhangTop;
float posX = position.X - charMetrics.OverhangLeft;
Sprite.Draw(charDesc.TableDescription.SRV, new STRVector(posX, posY), charMetrics.FullRectSize, STRVector.Zero, 0, charDesc.TexCoordsStart, charDesc.TexCoordsSize, color, coordinateType);
}
}
metrics.Merge(charMetrics);
position.X += charMetrics.Size.X;
//Break newlines
if (c == '\r')
{
position.X = metrics.TopLeft.X;
}
if (c == '\n')
{
position.Y = metrics.BottomRight.Y - charMetrics.Size.Y / 2;
}
}
}
/// <summary>
/// Draws the string unscaled in absolute coordinate system aligned in the given rectangle. The text is not clipped or wrapped.
/// </summary>
/// <param name="text">Text to draw</param>
/// <param name="rect">A position in absolute coordinates where the top left corner of the first character will be</param>
/// <param name="align">Alignment in rectangle</param>
/// <param name="color">Color in which to draw the text</param>
/// <returns>The StringMetrics for the rendered text</returns>
protected internal StringMetrics DrawString(string text, RectangleF rect, TextAlignment align, STRColor color)
{
return(DrawString(text, rect, align, FontSize, color, CoordinateType.Absolute));
}
private void IterateStringEm(string text, STRVector position, bool Draw, float realFontSize, STRColor color, CoordinateType coordinateType, out StringMetrics metrics)
{
float scale = realFontSize / _FontSize;
IterateString(text, position, Draw, scale, color, coordinateType, out metrics);
}
/// <summary>
/// Draws the string in the specified coordinate system aligned in the given rectangle. The text is not clipped or wrapped.
/// </summary>
/// <param name="text">The text to draw</param>
/// <param name="rect">The rectangle in which to align the text</param>
/// <param name="align">Alignment of text in rectangle</param>
/// <param name="realFontSize">The real font size in the chosen coordinate system</param>
/// <param name="color">The color in which to draw the text</param>
/// <param name="coordinateType">The chosen coordinate system</param>
/// <returns>The StringMetrics for the rendered text</returns>
protected internal StringMetrics DrawString(string text, RectangleF rect, TextAlignment align, float realFontSize, STRColor color, CoordinateType coordinateType)
{
//If text is aligned top and left, no adjustment has to be made
if (align.HasFlag(TextAlignment.Top) && align.HasFlag(TextAlignment.Left))
{
return(DrawString(text, new STRVector(rect.X, rect.Y), realFontSize, color, coordinateType));
}
text = text.Replace("\r", "");
var rawTextMetrics = MeasureString(text, realFontSize, coordinateType);
var mMetrics = MeasureString("m", realFontSize, coordinateType);
float startY;
if (align.HasFlag(TextAlignment.Top))
{
startY = rect.Top;
}
else if (align.HasFlag(TextAlignment.VerticalCenter))
{
startY = rect.Top + rect.Height / 2 - rawTextMetrics.Size.Y / 2;
}
else //Bottom
{
startY = rect.Bottom - rawTextMetrics.Size.Y;
}
var totalMetrics = new StringMetrics();
//break text into lines
var lines = text.Split('\n');
foreach (var line in lines)
{
float startX;
if (align.HasFlag(TextAlignment.Left))
{
startX = rect.X;
}
else
{
var lineMetrics = MeasureString(line, realFontSize, coordinateType);
if (align.HasFlag(TextAlignment.HorizontalCenter))
{
startX = rect.X + rect.Width / 2 - lineMetrics.Size.X / 2;
}
else //Right
{
startX = rect.Right - lineMetrics.Size.X;
}
}
var lineMetrics2 = DrawString(line, new STRVector(startX, startY), realFontSize, color, coordinateType);
float lineHeight;
if (mMetrics.Size.Y < 0)
{
lineHeight = Math.Min(lineMetrics2.Size.Y, mMetrics.Size.Y);
}
else
{
lineHeight = Math.Max(lineMetrics2.Size.Y, mMetrics.Size.Y);
}
startY += lineHeight;
totalMetrics.Merge(lineMetrics2);
}
return(totalMetrics);
}
/// <summary>
/// Draws the string untransformed in absolute coordinate system.
/// </summary>
/// <param name="text">The text to draw</param>
/// <param name="position">A position in absolute coordinates where the top left corner of the first character will be</param>
/// <param name="color">The color in which to draw the text</param>
/// <returns>The StringMetrics for the rendered text</returns>
protected internal StringMetrics DrawString(string text, STRVector position, STRColor color)
{
return(DrawString(text, position, FontSize, color, CoordinateType.Absolute));
}
/// <summary>
/// Draws the string in the specified coordinate system.
/// </summary>
/// <param name="text">The text to draw</param>
/// <param name="position">A position in the chosen coordinate system where the top left corner of the first character will be</param>
/// <param name="realFontSize">The real font size in the chosen coordinate system</param>
/// <param name="color">The color in which to draw the text</param>
/// <param name="coordinateType">The chosen coordinate system</param>
/// <returns>The StringMetrics for the rendered text</returns>
protected internal StringMetrics DrawString(string text, STRVector position, float realFontSize, STRColor color, CoordinateType coordinateType)
{
StringMetrics sm;
IterateStringEm(text, position, true, realFontSize, color, coordinateType, out sm);
return(sm);
}
/// <summary>
/// Draws a region of a texture on the screen.
/// </summary>
/// <param name="texture">The shader resource view of the texture to draw</param>
/// <param name="position">Position of the center of the texture in the chosen coordinate system</param>
/// <param name="size">Size of the texture in the chosen coordinate system. The size is specified in the screen's coordinate system.</param>
/// <param name="center">Specify the texture's center in the chosen coordinate system. The center is specified in the texture's local coordinate system. E.g. for <paramref name="coordinateType"/>=CoordinateType.SNorm, the texture's center is defined by (0, 0).</param>
/// <param name="rotationAngle">The angle in radians to rotate the texture. Positive values mean counter-clockwise rotation. Rotations can only be applied for relative or absolute coordinates. Consider using the Degrees or Radians helper structs.</param>
/// <param name="coordinateType">A custom coordinate system in which to draw the texture</param>
/// <param name="color">The color with which to multiply the texture</param>
/// <param name="texCoords">Texture coordinates for the top left corner</param>
/// <param name="texCoordsSize">Size of the region in texture coordinates</param>
protected internal void Draw(object texture, STRVector position, STRVector size, STRVector center, double rotationAngle, STRVector texCoords, STRVector texCoordsSize, STRColor color, CoordinateType coordinateType)
{
if (texture == null)
{
return;
}
size.X = Math.Abs(size.X);
size.Y = Math.Abs(size.Y);
//Difference vectors from the center to the texture edges (in screen coordinates).
STRVector left, up, right, down;
if (coordinateType == CoordinateType.UNorm)
{
left = new STRVector(0 - center.X * size.X, 0);
up = new STRVector(0, 0 - center.Y * size.Y);
right = new STRVector((1 - center.X) * size.X, 0);
down = new STRVector(0, (1 - center.Y) * size.Y);
}
else if (coordinateType == CoordinateType.SNorm)
{
left = new STRVector((-1 - center.X) * size.X / 2, 0);
up = new STRVector(0, (1 - center.Y) * size.Y / 2);
right = new STRVector((1 - center.X) * size.X / 2, 0);
down = new STRVector(0, (-1 - center.Y) * size.Y / 2);
}
else
{
left = new STRVector(-center.X, 0);
up = new STRVector(0, -center.Y);
right = new STRVector(size.X - center.X, 0);
down = new STRVector(0, size.Y - center.Y);
}
if (rotationAngle != 0)
{
if (coordinateType != CoordinateType.Absolute && coordinateType != CoordinateType.Relative)
{
//Normalized coordinates tend to be skewed when applying rotation
throw new ArgumentException("Rotation is only allowed for relative or absolute coordinates", "rotationAngle");
}
float sine = (float)Math.Sin(rotationAngle);
float cosine = (float)Math.Cos(rotationAngle);
left = Rotate(left, sine, cosine);
right = Rotate(right, sine, cosine);
up = Rotate(up, sine, cosine);
down = Rotate(down, sine, cosine);
}
var data = new SpriteVertexLayout.Struct();
data.TexCoord = texCoords;
data.TexCoordSize = texCoordsSize;
data.Color = color.ToArgb();
data.TopLeft = ConvertCoordinate(position + up + left, coordinateType);
data.TopRight = ConvertCoordinate(position + up + right, coordinateType);
data.BottomLeft = ConvertCoordinate(position + down + left, coordinateType);
data.BottomRight = ConvertCoordinate(position + down + right, coordinateType);
if (AllowReorder)
{
//Is there already a sprite for this texture?
if (textureSprites.ContainsKey(texture))
{
//Add the sprite to the last segment for this texture
var Segment = textureSprites[texture].Last();
AddIn(Segment, data);
}
else
{
//Add a new segment for this texture
AddNew(texture, data);
}
}
else
{
//Add a new segment for this texture
AddNew(texture, data);
}
}
/// <summary>
/// Draws a complete texture on the screen.
/// </summary>
/// <param name="texture">The shader resource view of the texture to draw</param>
/// <param name="position">Position of the top left corner of the texture in the chosen coordinate system</param>
/// <param name="size">Size of the texture in the chosen coordinate system. The size is specified in the screen's coordinate system.</param>
/// <param name="center">Specify the texture's center in the chosen coordinate system. The center is specified in the texture's local coordinate system. E.g. for <paramref name="coordinateType"/>=CoordinateType.SNorm, the texture's center is defined by (0, 0).</param>
/// <param name="rotationAngle">The angle in radians to rotate the texture. Positive values mean counter-clockwise rotation. Rotations can only be applied for relative or absolute coordinates. Consider using the Degrees or Radians helper structs.</param>
/// <param name="coordinateType">A custom coordinate system in which to draw the texture</param>
/// <param name="color">The color with which to multiply the texture</param>
protected internal void Draw(object texture, STRVector position, STRVector size, STRVector center, double rotationAngle, STRColor color, CoordinateType coordinateType)
{
Draw(texture, position, size, center, rotationAngle, STRVector.Zero, new STRVector(1, 1), color, coordinateType);
}
