internal Fonts()
{
VerySmallFont = new OpenGlFont(FontFamily.GenericSansSerif, 9.0f);
SmallFont = new OpenGlFont(FontFamily.GenericSansSerif, 12.0f);
NormalFont = new OpenGlFont(FontFamily.GenericSansSerif, 16.0f);
LargeFont = new OpenGlFont(FontFamily.GenericSansSerif, 21.0f);
VeryLargeFont = new OpenGlFont(FontFamily.GenericSansSerif, 27.0f);
EvenLargerFont = new OpenGlFont(FontFamily.GenericSansSerif, 34.0f);
}
/// <summary>Renders a string to the screen.</summary>
/// <param name="font">The font to use.</param>
/// <param name="text">The string to render.</param>
/// <param name="location">The location.</param>
/// <param name="alignment">The alignment.</param>
/// <param name="color">The color.</param>
/// <param name="shadow">Whether to draw a shadow.</param>
/// <remarks>This function sets the OpenGL blend function to glBlendFunc(Gl.GL_SRC_ALPHA, Gl.GL_ONE_MINUS_SRC_ALPHA).</remarks>
public void Draw(OpenGlFont font, string text, Vector2 location, TextAlignment alignment, Color128 color, bool shadow)
{
if (shadow)
{
Draw(font, text, new Vector2(location.X - 1, location.Y + 1), alignment, new Color128(0.0f, 0.0f, 0.0f, 0.5f * color.A));
Draw(font, text, location, alignment, color);
}
else
{
Draw(font, text, location, alignment, color);
}
}
internal Fonts(HostInterface currentHost, FileSystem fileSystem)
{
fontCollection = new PrivateFontCollection();
FontFamily uiFont = FontFamily.GenericSansSerif;
switch (currentHost.Platform)
{
case HostPlatform.AppleOSX:
// This gets us a much better Unicode glyph set
uiFont = new FontFamily("Arial Unicode MS");
break;
}
VerySmallFont = new OpenGlFont(uiFont, 9.0f);
SmallFont = new OpenGlFont(uiFont, 12.0f);
NormalFont = new OpenGlFont(uiFont, 16.0f);
LargeFont = new OpenGlFont(uiFont, 21.0f);
VeryLargeFont = new OpenGlFont(uiFont, 27.0f);
EvenLargerFont = new OpenGlFont(uiFont, 34.0f);
}
private void DrawWithShader(string text, OpenGlFont font, double left, double top, Color128 color)
{
Shader.Activate();
renderer.CurrentShader = Shader;
Shader.SetCurrentProjectionMatrix(renderer.CurrentProjectionMatrix);
Shader.SetCurrentModelViewMatrix(renderer.CurrentViewMatrix);
for (int i = 0; i < text.Length; i++)
{
Texture texture;
OpenGlFontChar data;
i += font.GetCharacterData(text, i, out texture, out data) - 1;
if (renderer.currentHost.LoadTexture(texture, OpenGlTextureWrapMode.ClampClamp))
{
GL.BindTexture(TextureTarget.Texture2D, texture.OpenGlTextures[(int)OpenGlTextureWrapMode.ClampClamp].Name);
Shader.SetAtlasLocation(data.TextureCoordinates);
double x = left - (data.PhysicalSize.X - data.TypographicSize.X) / 2;
double y = top - (data.PhysicalSize.Y - data.TypographicSize.Y) / 2;
/*
* In the first pass, mask off the background with pure black.
*/
GL.BlendFunc(BlendingFactor.Zero, BlendingFactor.OneMinusSrcColor);
Shader.SetColor(new Color128(color.A, color.A, color.A, 1.0f));
Shader.SetPoint(new Vector2(x, y));
Shader.SetSize(data.PhysicalSize);
/*
* In order to call GL.DrawArrays with procedural data within the shader,
* we first need to bind a dummy VAO
* If this is not done, it will generate an InvalidOperation error code
*/
renderer.dummyVao.Bind();
GL.DrawArrays(PrimitiveType.TriangleStrip, 0, 6);
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.One);
Shader.SetColor(color);
GL.DrawArrays(PrimitiveType.TriangleStrip, 0, 6);
}
left += data.TypographicSize.X;
}
renderer.RestoreBlendFunc();
}
/// <summary>Gets the next smallest font</summary>
/// <param name="currentFont">The font we require the smaller version for</param>
/// <returns>The next smallest font</returns>
public OpenGlFont NextSmallestFont(OpenGlFont currentFont)
{
switch ((int)currentFont.FontSize)
{
case 9:
case 12:
return(VerySmallFont);
case 16:
return(SmallFont);
case 21:
return(NormalFont);
case 27:
return(LargeFont);
case 34:
return(VeryLargeFont);
default:
return(EvenLargerFont);
}
}
/// <summary>Renders a string to the screen.</summary>
/// <param name="font">The font to use.</param>
/// <param name="text">The string to render.</param>
/// <param name="location">The location.</param>
/// <param name="alignment">The alignment.</param>
/// <param name="color">The color.</param>
/// <remarks>This function sets the OpenGL blend function to glBlendFunc(Gl.GL_SRC_ALPHA, Gl.GL_ONE_MINUS_SRC_ALPHA).</remarks>
public void Draw(OpenGlFont font, string text, Vector2 location, TextAlignment alignment, Color128 color)
{
if (text == null || font == null)
{
return;
}
renderer.LastBoundTexture = null;
/*
* Prepare the top-left coordinates for rendering, incorporating the
* orientation of the string in relation to the specified location.
* */
double left;
if ((alignment & TextAlignment.Left) == 0)
{
double width = 0;
for (int i = 0; i < text.Length; i++)
{
Texture texture;
OpenGlFontChar data;
i += font.GetCharacterData(text, i, out texture, out data) - 1;
width += data.TypographicSize.X;
}
if ((alignment & TextAlignment.Right) != 0)
{
left = location.X - width;
}
else
{
left = location.X - width / 2;
}
}
else
{
left = location.X;
}
double top;
if ((alignment & TextAlignment.Top) == 0)
{
double height = 0;
for (int i = 0; i < text.Length; i++)
{
Texture texture;
OpenGlFontChar data;
i += font.GetCharacterData(text, i, out texture, out data) - 1;
if (data.TypographicSize.Y > height)
{
height = data.TypographicSize.Y;
}
}
if ((alignment & TextAlignment.Bottom) != 0)
{
top = location.Y - height;
}
else
{
top = location.Y - height / 2;
}
}
else
{
top = location.Y;
}
if (renderer.AvailableNewRenderer && Shader != null)
{
DrawWithShader(text, font, left, top, color);
}
else
{
DrawImmediate(text, font, left, top, color);
}
}
private void DrawImmediate(string text, OpenGlFont font, double left, double top, Color128 color)
{
/*
* Render the string.
* */
GL.Enable(EnableCap.Texture2D);
GL.MatrixMode(MatrixMode.Projection);
GL.PushMatrix();
unsafe
{
fixed(double *matrixPointer = &renderer.CurrentProjectionMatrix.Row0.X)
{
GL.LoadMatrix(matrixPointer);
}
GL.MatrixMode(MatrixMode.Modelview);
GL.PushMatrix();
fixed(double *matrixPointer = &renderer.CurrentViewMatrix.Row0.X)
{
GL.LoadMatrix(matrixPointer);
}
}
for (int i = 0; i < text.Length; i++)
{
Texture texture;
OpenGlFontChar data;
i += font.GetCharacterData(text, i, out texture, out data) - 1;
if (renderer.currentHost.LoadTexture(texture, OpenGlTextureWrapMode.ClampClamp))
{
GL.BindTexture(TextureTarget.Texture2D, texture.OpenGlTextures[(int)OpenGlTextureWrapMode.ClampClamp].Name);
double x = left - (data.PhysicalSize.X - data.TypographicSize.X) / 2;
double y = top - (data.PhysicalSize.Y - data.TypographicSize.Y) / 2;
/*
* In the first pass, mask off the background with pure black.
* */
GL.BlendFunc(BlendingFactor.Zero, BlendingFactor.OneMinusSrcColor);
GL.Begin(PrimitiveType.Quads);
GL.Color4(color.A, color.A, color.A, 1.0f);
GL.TexCoord2(data.TextureCoordinates.X, data.TextureCoordinates.Y);
GL.Vertex2(x, y);
GL.TexCoord2(data.TextureCoordinates.X + data.TextureCoordinates.Z, data.TextureCoordinates.Y);
GL.Vertex2(x + data.PhysicalSize.X, y);
GL.TexCoord2(data.TextureCoordinates.X + data.TextureCoordinates.Z, data.TextureCoordinates.Y + data.TextureCoordinates.W);
GL.Vertex2(x + data.PhysicalSize.X, y + data.PhysicalSize.Y);
GL.TexCoord2(data.TextureCoordinates.X, data.TextureCoordinates.Y + data.TextureCoordinates.W);
GL.Vertex2(x, y + data.PhysicalSize.Y);
GL.End();
/*
* In the second pass, add the character onto the background.
* */
GL.BlendFunc(BlendingFactor.SrcAlpha, BlendingFactor.One);
GL.Begin(PrimitiveType.Quads);
GL.Color4(color.R, color.G, color.B, color.A);
GL.TexCoord2(data.TextureCoordinates.X, data.TextureCoordinates.Y);
GL.Vertex2(x, y);
GL.TexCoord2(data.TextureCoordinates.X + data.TextureCoordinates.Z, data.TextureCoordinates.Y);
GL.Vertex2(x + data.PhysicalSize.X, y);
GL.TexCoord2(data.TextureCoordinates.X + data.TextureCoordinates.Z, data.TextureCoordinates.Y + data.TextureCoordinates.W);
GL.Vertex2(x + data.PhysicalSize.X, y + data.PhysicalSize.Y);
GL.TexCoord2(data.TextureCoordinates.X, data.TextureCoordinates.Y + data.TextureCoordinates.W);
GL.Vertex2(x, y + data.PhysicalSize.Y);
GL.End();
}
left += data.TypographicSize.X;
}
renderer.RestoreBlendFunc();
GL.Disable(EnableCap.Texture2D);
GL.PopMatrix();
GL.MatrixMode(MatrixMode.Projection);
GL.PopMatrix();
}
