/// <summary>
/// Generates an image sprite based on the specified <see cref="SpriteDocument"/>.
/// </summary>
public async Task Generate(SpriteDocument doc)
{
var images = GetImages(doc);
int width = doc.Orientation == Orientation.Vertical ? images.Values.Max(i => i.Width) + (doc.Padding * 2) : images.Values.Sum(i => i.Width) + (doc.Padding * images.Count) + doc.Padding;
int height = doc.Orientation == Orientation.Vertical ? images.Values.Sum(img => img.Height) + (doc.Padding * images.Count) + doc.Padding : images.Values.Max(img => img.Height) + (doc.Padding * 2);
List <SpriteFragment> fragments = new List <SpriteFragment>();
using (var bitmap = new Bitmap(width, height))
{
bitmap.SetResolution(doc.Dpi, doc.Dpi);
using (Graphics canvas = Graphics.FromImage(bitmap))
{
if (doc.Orientation == Orientation.Vertical)
{
Vertical(images, fragments, canvas, doc.Padding);
}
else
{
Horizontal(images, fragments, canvas, doc.Padding);
}
}
string outputFile = doc.FileName + doc.OutputExtension;
OnSaving(outputFile, doc);
bitmap.Save(outputFile, SpriteHelpers.ExtensionFromFormat(doc.Output));
OnSaved(outputFile, doc);
}
await SpriteExporter.ExportStylesheet(fragments, doc, this);
}
private static Dictionary <string, Bitmap> GetImages(SpriteDocument doc)
{
var images = new Dictionary <string, Bitmap>();
var source = doc.ToAbsoluteImages();
foreach (string ident in source.Keys)
{
string file = source[ident];
if (!File.Exists(file))
{
throw new FileNotFoundException("One or more sprite input files don't exist", file);
}
var bitmap = (Bitmap)Image.FromFile(file);
bitmap.SetResolution(doc.Dpi, doc.Dpi);
images.Add(ident, bitmap);
}
return(images);
}
/// <summary>
/// Creates a new instance.
/// </summary>
public SpriteImageGenerationEventArgs(string fileName, SpriteDocument document)
{
FileName = fileName;
Document = document;
}
public async static Task ExportStylesheet(IEnumerable <SpriteFragment> fragments, SpriteDocument doc, SpriteImageGenerator generator)
{
if (doc.Stylesheet == Stylesheet.None)
{
return;
}
var mainClass = SpriteHelpers.GetIdentifier(doc.FileName);
string outputFile = doc.FileName + "." + doc.Stylesheet.ToString().ToLowerInvariant();
var outputDirectory = Path.GetDirectoryName(outputFile);
var bgUrl = doc.PathPrefix + SpriteHelpers.MakeRelative(outputFile, doc.FileName + doc.OutputExtension);
StringBuilder sb = new StringBuilder(GetDescription(doc.Stylesheet));
if (doc.Stylesheet == Stylesheet.Css)
{
sb.AppendLine($".{mainClass} {{");
sb.AppendLine($"\tbackground-image: url('{bgUrl}');");
sb.AppendLine($"\tbackground-repeat: no-repeat;");
AddCustomStyles(doc.CustomStyles, sb);
sb.AppendLine("}");
}
foreach (SpriteFragment fragment in fragments)
{
if (doc.Stylesheet == Stylesheet.Css)
{
sb.AppendLine($"{GetSelector(fragment.ID, mainClass, doc.Stylesheet)} {{");
sb.AppendLine($"\twidth: {fragment.Width}px;");
sb.AppendLine($"\theight: {fragment.Height}px;");
sb.AppendLine($"\tbackground-position: -{fragment.X}px -{fragment.Y}px;");
sb.AppendLine("}");
}
else if (doc.Stylesheet == Stylesheet.Styl)
{
sb.AppendLine(GetSelector(fragment.ID, mainClass, doc.Stylesheet));
sb.AppendLine($"\twidth {fragment.Width}px");
sb.AppendLine($"\theigh {fragment.Height}px");
sb.AppendLine($"\tbackground-position -{fragment.X}px -{fragment.Y}px");
}
else
{
sb.AppendLine(GetSelector(fragment.ID, mainClass, doc.Stylesheet) + " {");
sb.AppendLine($"\twidth: {fragment.Width}px;");
sb.AppendLine($"\theight: {fragment.Height}px;");
AddCustomStyles(doc.CustomStyles, sb);
sb.AppendLine($"\tbackground: url('{bgUrl}') -{fragment.X}px -{fragment.Y}px no-repeat;");
sb.AppendLine("}");
}
}
if (File.Exists(outputFile) && File.ReadAllText(outputFile) == sb.ToString())
{
return;
}
Directory.CreateDirectory(outputDirectory);
using (var writer = new StreamWriter(outputFile))
{
generator.OnSaving(outputFile, doc);
await writer.WriteAsync(sb.ToString().Replace("-0px", "0"));
generator.OnSaved(outputFile, doc);
}
}
internal void OnSaved(string fileName, SpriteDocument doc)
{
Saved?.Invoke(this, new SpriteImageGenerationEventArgs(fileName, doc));
}
