/// <summary>
/// Creates a <see cref="SpriteFontFaceDescription"/> from the specified input file.
/// </summary>
private static SpriteFontFaceDescription CreateSpriteFontFaceDescription(ContentManager manager, IContentProcessorMetadata metadata, XElement input)
{
if (input == null)
{
return(null);
}
var spriteFontFaceDesc = new SpriteFontFaceDescription();
var textureElement = input.Element("Texture");
spriteFontFaceDesc.Texture = (String)textureElement;
var textureRegionElement = input.Element("TextureRegion");
spriteFontFaceDesc.TextureRegion = (textureRegionElement == null) ? (Rectangle?)null :
Rectangle.Parse((String)textureRegionElement);
var glyphsElement = input.Element("Glyphs");
if (glyphsElement != null)
{
var glyphsDesc = new SpriteFontFaceGlyphDescription();
spriteFontFaceDesc.Glyphs = glyphsDesc;
var substitutionElement = glyphsElement.Element("Substitution");
glyphsDesc.Substitution = (substitutionElement == null) ? (Char?)null :
Char.Parse((String)substitutionElement);
}
var kerningsElement = input.Element("Kernings");
if (kerningsElement != null)
{
var kernings = new Dictionary <String, Int32>();
spriteFontFaceDesc.Kernings = kernings;
kernings["default"] = (Int32?)kerningsElement.Attribute("DefaultAdjustment") ?? 0;
var kerningElements = kerningsElement.Elements("Kerning");
foreach (var kerningElement in kerningElements)
{
var kerningPair = (String)kerningElement.Attribute("Pair");
var kerningValue = (Int32)kerningElement;
kernings[kerningPair] = kerningValue;
}
}
return(spriteFontFaceDesc);
}
/// <summary>
/// Exports a font face to the specified preprocessed asset stream.
/// </summary>
private static void ExportPreprocessedFace(ContentManager manager,
IContentProcessorMetadata metadata, BinaryWriter writer, SpriteFontFaceDescription description, String style, Boolean delete)
{
if (description == null)
{
writer.Write(false);
return;
}
writer.Write(true);
var textureName = ResolveDependencyAssetPath(metadata, description.Texture);
writer.Write(textureName ?? String.Empty);
var textureRegion = description.TextureRegion;
writer.Write(textureRegion.HasValue);
if (textureRegion.HasValue)
{
writer.Write(textureRegion.Value.X);
writer.Write(textureRegion.Value.Y);
writer.Write(textureRegion.Value.Width);
writer.Write(textureRegion.Value.Height);
}
if (String.IsNullOrEmpty(textureName))
{
throw new ContentLoadException(OpenGLStrings.InvalidSpriteFontTexture);
}
var glyphs = default(IEnumerable <Rectangle>);
using (var surface = manager.Import <SDL_Surface>(textureName))
glyphs = OpenGLSpriteFontHelper.IdentifyGlyphs(surface, textureRegion);
var substitution = description.Glyphs?.Substitution ?? '?';
writer.Write(substitution);
writer.Write(glyphs.Count());
foreach (var glyph in glyphs)
{
writer.Write(glyph.X);
writer.Write(glyph.Y);
writer.Write(glyph.Width);
writer.Write(glyph.Height);
}
var kerningDefaultAdjustment = description.Kernings?["default"] ?? 0;
var kerning = description.Kernings?.Where(x => !String.Equals(x.Key, "default", StringComparison.InvariantCulture))
.ToDictionary(x => CreateKerningPair(x.Key), x => x.Value);
writer.Write(kerningDefaultAdjustment);
writer.Write(kerning.Count);
foreach (var kvp in kerning)
{
writer.Write(kvp.Key.FirstCharacter);
writer.Write(kvp.Key.SecondCharacter);
writer.Write(kvp.Value);
}
}
/// <summary>
/// Processes the definition for a single font face.
/// </summary>
private static SpriteFontFace ProcessFace(Dictionary <String, SDL_Surface> textures, ContentManager manager,
IContentProcessorMetadata metadata, SpriteFontFaceDescription description, String style, IEnumerable <CharacterRegion> characterRegions)
{
if (description == null)
{
return(null);
}
var textureName = ResolveDependencyAssetPath(metadata, description.Texture);
var textureRegion = description.TextureRegion;
if (String.IsNullOrEmpty(textureName))
{
throw new ContentLoadException(OpenGLStrings.InvalidSpriteFontTexture);
}
var faceSurface = textures[textureName];
var faceGlyphs = OpenGLSpriteFontHelper.IdentifyGlyphs(faceSurface, textureRegion);
var faceTexture = manager.Load <Texture2D>(textureName);
var face = new SpriteFontFace(manager.Ultraviolet,
faceTexture, characterRegions, faceGlyphs, description.Glyphs?.Substitution ?? '?');
var kerningDefaultAdjustment = description.Kernings?["default"] ?? 0;
var kerning = description.Kernings?.Where(x => !String.Equals(x.Key, "default", StringComparison.InvariantCulture))
.ToDictionary(x => CreateKerningPair(x.Key), x => x.Value);
face.Kerning.DefaultAdjustment = kerningDefaultAdjustment;
foreach (var kvp in kerning)
{
face.Kerning.Set(kvp.Key, kvp.Value);
}
return(face);
}