/// <summary>
/// Prepares text for drawing.
/// </summary>
/// <param name="text">The string to draw.</param>
/// <param name="font">The font to use for drawing.</param>
/// <param name="handle">The handle to the cached text. Use this to draw the text with the Draw() function.</param>
/// <param name="width">Not implemented.</param>
/// <param name="wordWarp">Not implemented.</param>
/// <see cref="TextPrinter.Draw()"/>
public void Prepare(string text, TextureFont font, out TextHandle handle, float width, bool wordWarp)
{
this.Prepare(text, font, out handle, width, wordWarp, StringAlignment.Near, false);
}
public void InitFonts()
{
//Init Fonts to defaults
LabelFont = new TextureFont(new Font(FontFamily.GenericSansSerif, 10.0f));
LabelFont.RebuildTextures();
TitleFont = new TextureFont(new Font(FontFamily.GenericSansSerif, 18.0f));
AxesFont = new TextureFont(new Font(FontFamily.GenericSansSerif, 14.0f, FontStyle.Bold));
}
/// <summary>
/// Draws dynamic text without caching. Not implemented yet!
/// </summary>
/// <param name="text">The System.String to draw.</param>
/// <param name="font">The OpenTK.Fonts.TextureFont to draw the text in.</param>
public void Draw(string text, TextureFont font)
{
//printer.Draw(text);
}
// Performs layout on the given string.
void PerformLayout(string text, TextureFont font, float width, bool wordWarp, StringAlignment alignment,
bool rightToLeft, ref Vector2[] vertices, ref ushort[] indices, out int num_indices)
{
if (text == null)
throw new ArgumentNullException("Parameter cannot be null.", "text");
if (text.Length > 8192)
throw new ArgumentOutOfRangeException("text", text.Length, "Text length must be between 1 and 8192 characters");
if (wordWarp || rightToLeft || alignment != StringAlignment.Near)
throw new NotImplementedException();
while (8 * text.Length > vertices.Length)
vertices = new Vector2[vertices.Length << 1];
while (6 * text.Length > indices.Length)
indices = new ushort[indices.Length << 1];
num_indices = 6 * text.Length;
//Vector2[] vertices = new Vector2[8 * text.Length]; // Interleaved, vertex, texcoord, vertex, etc...
//ushort[] indices = new ushort[6 * text.Length];
float x_pos = 0, y_pos = 0;
ushort i = 0, index_count = 0, vertex_count = 0, last_break_point = 0;
Box2 rect = new Box2();
float char_width, char_height, measured_width, measured_height;
int texture;
font.LoadGlyphs(text);
// Every character comprises of 4 vertices, forming two triangles. We generate an index array which
// indexes vertices in a triangle-strip fashion. To create a single strip for the whole string, we
// need to add a degenerate triangle (0 height) to connect the last vertex of the previous line with
// the first vertex of the next line.
// This algorithm works for left-to-right scripts.
if (alignment == StringAlignment.Near && !rightToLeft || alignment == StringAlignment.Far && rightToLeft)
{
foreach (char c in text)
{
if (Char.IsSeparator(c))
last_break_point = index_count;
if (c != '\n' && c != '\r')
{
font.GlyphData(c, out char_width, out char_height, out rect, out texture);
vertices[vertex_count].X = x_pos; // Vertex
vertices[vertex_count++].Y = y_pos;
vertices[vertex_count].X = rect.Left; // Texcoord
vertices[vertex_count++].Y = rect.Top;
vertices[vertex_count].X = x_pos; // Vertex
vertices[vertex_count++].Y = y_pos + char_height;
vertices[vertex_count].X = rect.Left; // Texcoord
vertices[vertex_count++].Y = rect.Bottom;
vertices[vertex_count].X = x_pos + char_width; // Vertex
vertices[vertex_count++].Y = y_pos + char_height;
vertices[vertex_count].X = rect.Right; // Texcoord
vertices[vertex_count++].Y = rect.Bottom;
vertices[vertex_count].X = x_pos + char_width; // Vertex
vertices[vertex_count++].Y = y_pos;
vertices[vertex_count].X = rect.Right; // Texcoord
vertices[vertex_count++].Y = rect.Top;
indices[index_count++] = (ushort)(vertex_count - 8);
indices[index_count++] = (ushort)(vertex_count - 6);
indices[index_count++] = (ushort)(vertex_count - 4);
indices[index_count++] = (ushort)(vertex_count - 4);
indices[index_count++] = (ushort)(vertex_count - 2);
indices[index_count++] = (ushort)(vertex_count - 8);
font.MeasureString(text.Substring(i, 1), out measured_width, out measured_height);
x_pos += measured_width;
}
else if (c == '\n')
{
//x_pos = layoutRect.Left;
x_pos = 0;
y_pos += font.Height;
}
++i;
}
}
else if (alignment != StringAlignment.Center)
{
throw new NotImplementedException("This feature is not yet implemented. Sorry for the inconvenience.");
}
else
{
throw new NotImplementedException("This feature is not yet implemented. Sorry for the inconvenience.");
}
}
/// <summary>
/// Prepares text for drawing.
/// </summary>
/// <param name="text">The string to draw.</param>
/// <param name="font">The font to use for drawing.</param>
/// <param name="handle">The handle to the cached text. Use this to draw the text with the Draw() function.</param>
/// <param name="width">Not implemented.</param>
/// <param name="wordWarp">Not implemented.</param>
/// <param name="alignment">Not implemented.</param>
/// <param name="rightToLeft">Not implemented.</param>
/// <see cref="TextPrinter.Draw()"/>
/// <exception cref="NotSupportedException">Occurs when OpenGL 1.1 is not supported.</exception>
public void Prepare(string text, TextureFont font, out TextHandle handle, float width, bool wordWarp, StringAlignment alignment, bool rightToLeft)
{
if (!functionality_checked)
CheckNeededFunctionality();
int num_indices;
PerformLayout(text, font, width, wordWarp, alignment, rightToLeft, ref vertices, ref indices, out num_indices);
handle = printer.Load(vertices, indices, num_indices);
handle.font = font;
}
private TextHandle GetTextHandle(string text, TextureFont font)
{
if (!cachedHandles.ContainsKey(text))
{
TextHandle handle;
printer.Prepare(text, font, out handle);
cachedHandles[text] = handle;
}
return cachedHandles[text];
}
/// <summary>
/// Prepares text for drawing.
/// </summary>
/// <param name="text">The string to draw.</param>
/// <param name="font">The font to use for drawing.</param>
/// <param name="handle">The handle to the cached text. Use this to draw the text with the Draw() function.</param>
/// <see cref="TextPrinter.Draw()"/>
public void Prepare(string text, TextureFont font, out TextHandle handle)
{
this.Prepare(text, font, out handle, 0, false, StringAlignment.Near, false);
}
