public AdvancedDrawBatch(GraphicsDevice device)
{
GraphicsDevice = device;
_primitiveBatch = new PrimitiveBatch(device);
_spriteBatch = new SpriteBatch(device);
_basicEffect = new BasicEffect(device);
}
internal void Draw(PrimitiveBatch primitiveBatch, string text, Vector2 position, Color color, float spacing, float lineHeight, float scale, TextRotation rotation = TextRotation.None)
{
StringProvider provider = new StringProvider(text);
_colors[0] = color;
DrawInternal(primitiveBatch, provider, position, _colors, 1, spacing, lineHeight, scale, rotation);
}
void DrawGlyph(PrimitiveBatch primitiveBatch, Glyph glyph, ref Vector2 position, ref Color color, float scale, ref Vector2 right, ref Vector2 down)
{
float topLeftX = (glyph.X - 1) / (float)FontSheet.Width;
float topLeftY = (glyph.Y - 1) / (float)FontSheet.Height;
float bottomRightX = (float)(glyph.X + glyph.Width + 1) / (float)FontSheet.Width;
float bottomRightY = (float)(glyph.Y + glyph.Height + 1) / (float)FontSheet.Height;
Vector2 topLeft = position - (right + down) * scale;
Vector2 topRight = position + (right - down) * scale + right * glyph.Width * scale;
Vector2 bottomLeft = position - (right - down) * scale + down * glyph.Height * scale;
Vector2 bottomRight = position + (right + down) * scale + right * glyph.Width * scale + down * glyph.Height * scale;
primitiveBatch.AddVertex(topLeft.X, topLeft.Y, ref color, topLeftX, topLeftY);
primitiveBatch.AddVertex(bottomLeft.X, bottomLeft.Y, ref color, topLeftX, bottomRightY);
primitiveBatch.AddVertex(topRight.X, topRight.Y, ref color, bottomRightX, topLeftY);
primitiveBatch.AddVertex(bottomLeft.X, bottomLeft.Y, ref color, topLeftX, bottomRightY);
primitiveBatch.AddVertex(topRight.X, topRight.Y, ref color, bottomRightX, topLeftY);
primitiveBatch.AddVertex(bottomRight.X, bottomRight.Y, ref color, bottomRightX, bottomRightY);
}
void DrawInternal(PrimitiveBatch primitiveBatch, StringProvider text, Vector2 targetPosition, Color[] colors, float opacity, float spacing, float lineHeight, float scale, TextRotation rotation)
{
if (primitiveBatch.PrimitiveType != PrimitiveType.TriangleList)
{
throw new Exception("PrimitiveBatch has to be started with TriangleList primitive type.");
}
Vector2 right = new Vector2(1, 0);
Vector2 down = new Vector2(0, 1);
switch (rotation)
{
case TextRotation.Rotate180:
right = new Vector2(-1, 0);
down = new Vector2(0, -1);
break;
case TextRotation.Rotate270:
right = new Vector2(0, 1);
down = new Vector2(-1, 0);
break;
case TextRotation.Rotate90:
right = new Vector2(0, -1);
down = new Vector2(1, 0);
break;
}
int count = text.Length;
char previousChar = '\0';
spacing = (float)Height * spacing * scale;
Vector2 position = targetPosition;
Color color;
for (int idx = 0; idx < count; ++idx)
{
char character = text[idx];
Glyph glyph = Find(character);
if (glyph != null)
{
if (previousChar != '\0')
{
float kerning = (float)glyph.Kerning(previousChar) / 10f;
position += right * (kerning * scale + spacing);
}
previousChar = character;
Vector2 pos = position + down * (scale * (glyph.Top - CapLine));
color = colors[idx % colors.Length] * opacity;
DrawGlyph(primitiveBatch, glyph, ref pos, ref color, scale, ref right, ref down);
position += right * (glyph.Width * scale);
}
else if (text[idx] == '\n')
{
if (rotation == TextRotation.Rotate270 || rotation == TextRotation.Rotate90)
{
position.Y = targetPosition.Y;
}
else
{
position.X = targetPosition.X;
}
position += down * (lineHeight * Height * scale);
previousChar = '\0';
}
}
}
internal void Draw(PrimitiveBatch primitiveBatch, StringBuilder text, Vector2 position, Color[] colors, float opacity, float spacing, float lineHeight, float scale, TextRotation rotation = TextRotation.None)
{
StringProvider provider = new StringProvider(text);
DrawInternal(primitiveBatch, provider, position, colors, opacity, spacing, lineHeight, scale, rotation);
}
