public ActionResult Sprites(string file, string key, string type)
{
var definition = GenerateSpriteDefinition(file);
// we hebben hier nu de definitie van deze file; uithalen wat we nodig hebben
var images = definition.Rules.Where(r => DataUriHelper.GetStringFromImageType(r.ImageFormat).Equals(type) && r.SpriteName.Equals(key)).ToList();
// image bouwen
Bitmap bmp = new Bitmap(images.Max(i => i.Width), images.Sum(i => i.Height));
using (Graphics grp = Graphics.FromImage(bmp))
{
foreach (var img in images)
{
using (MemoryStream ms = new MemoryStream(img.Bytes))
{
grp.DrawImage(new Bitmap(ms), new Point {
X = img.X, Y = img.Y
});
}
}
}
return(new ImageResult
{
Image = bmp,
ImageFormat = ImageFormat.Png
});
}
private SpriteRuleSet GenerateSpriteDefinition(string file)
{
if (!file.StartsWith("~/"))
{
file = "~/" + file;
}
return(_provider.GetFromCache("spritedefinition." + file, () =>
{
var parser = new BoneSoft.CSS.CSSParser();
var fullCssPath = HttpContext.Server.MapPath(file);
string allText = System.IO.File.ReadAllText(fullCssPath);
if (_provider.Enable.CssTidy)
{
allText = new CssTidy().Tidy(fullCssPath);
}
var doc = parser.ParseText(allText);
MurmurHash2UInt32Hack hashing = new MurmurHash2UInt32Hack();
uint hash = 0;
// check whether we have to sprite some images
List <SpriteRule> rules = new List <SpriteRule>();
List <RuleSet> spritesFromCss = doc.RuleSets.Where(d => d.Declarations.Any(r => r.Name.Equals("moth-sprite", StringComparison.OrdinalIgnoreCase))).ToList();
foreach (var sprite in spritesFromCss)
{
var spriteName = sprite.Declarations.First(r => r.Name == "moth-sprite");
Term term = GetImageTerm(sprite);
string localPath = term.Value;
var fullLocalPath = Path.Combine(HttpContext.Server.MapPath(Path.GetDirectoryName(file)), localPath);
var bytes = System.IO.File.ReadAllBytes(fullLocalPath);
var spriteRule = new SpriteRule
{
Bytes = bytes,
Filename = localPath,
SpriteName = spriteName.Expression.Terms.First().Value
};
using (var imageStream = new MemoryStream(bytes))
{
var bitmap = Image.FromStream(imageStream);
spriteRule.ImageFormat = bitmap.RawFormat;
spriteRule.Width = bitmap.Width;
spriteRule.Height = bitmap.Height;
//spriteRule.X = 0;
//spriteRule.Y = positionTable.ContainsKey(spriteRule.SpriteName) ? positionTable[spriteRule.SpriteName] : 0;
}
/*if (!positionTable.ContainsKey(spriteRule.SpriteName))
* positionTable.Add(spriteRule.SpriteName, 0);
*
* positionTable[spriteRule.SpriteName] += spriteRule.Height;
*
* sprite.Declarations.Add(new Declaration {Name = "background-position-x", Expression = new Expression { Terms = new List<Term>{ new Term { Value = spriteRule.X + "px"}}}});
* sprite.Declarations.Add(new Declaration { Name = "background-position-y", Expression = new Expression { Terms = new List<Term> { new Term { Value = -spriteRule.Y + "px" } } } });
*/
sprite.Declarations.Add(new Declaration {
Name = "moth-original-filename", Expression = new Expression {
Terms = new List <Term> {
new Term {
Value = localPath
}
}
}
});
term.Value = string.Format("../../resources/sprites/?file={0}&key={1}&type={2}", file, spriteName.Expression, DataUriHelper.GetStringFromImageType(spriteRule.ImageFormat));
hash ^= hashing.Hash(bytes);
rules.Add(spriteRule);
}
// sort sprites
var blah = rules.ToArray();
new SpriteAlghoritms().AlgSortByArea(1200, blah);
rules = blah.ToList();
// add hash to every call
foreach (var sprite in spritesFromCss)
{
var term = GetImageTerm(sprite);
term.Value += string.Format("&{0}", hash);
var spriteRule = rules.First(r => r.Filename == sprite.Declarations.First(f => f.Name == "moth-original-filename").Expression.Terms.First().Value);
// set position-x and position-y
sprite.Declarations.Add(new Declaration {
Name = "background-position-x", Expression = new Expression {
Terms = new List <Term> {
new Term {
Value = spriteRule.X + "px"
}
}
}
});
sprite.Declarations.Add(new Declaration {
Name = "background-position-y", Expression = new Expression {
Terms = new List <Term> {
new Term {
Value = -spriteRule.Y + "px"
}
}
}
});
// remove moth- extensions
sprite.Declarations = sprite.Declarations.Where(s => !s.Name.StartsWith("moth-")).ToList();
}
// find all URL declarations that aren't already processed by the spriting
foreach (var uri in doc.RuleSets
.SelectMany(d => d.Declarations.SelectMany(r => r.Expression.Terms.Where(t => t.Type == TermType.Url))))
{
MakeUriTagRelative(uri, fullCssPath);
}
//foreach(var image in doc.RuleSets
// .Where(d => !d.Declarations.Any(r => r.Name.Equals("moth-original-filename", StringComparison.OrdinalIgnoreCase)))
// .Where(d=>d.Declarations.Any(r => r.Name.Equals("background-image", StringComparison.OrdinalIgnoreCase))
// || d.Declarations.Any(r => r.Name.Equals("background", StringComparison.OrdinalIgnoreCase))).ToList())
//{
// var imageTag = GetImageTerm(image);
// // replace the current value of the image tag with a new relative path
//}
return new SpriteRuleSet
{
Hash = hash.ToString(),
Document = doc,
Rules = rules
};
}, _provider.CacheDurations.ExternalScript));
}