[T4] url, base64, sprite 三種格式的 icons.css 產生器

之前有寫過 [PHP] url, base64, sprite 三種格式的 icons.css 產生器，這次換用 C# T4 Text Templates 來製作這個功能:

原始碼

1. int spriteGap = 30;   
2. var scanTypes = new string[]{".jpg", ".gif", ".png"}; 
3.  
4. string workDirectory =  
5.    Path.GetDirectoryName(this.Host.TemplateFile); 
6.  
7.  
8. /* 取得圖檔資訊 */   
9. List<ImageInfo> imageList = Directory 
10.    .EnumerateFiles(Path.Combine(workDirectory, "icons")) 
11.    .Where(path => scanTypes.Contains(Path.GetExtension(path))) 
12.    .Select(path =>  
13.    { 
14.        var image = Image.FromFile(path); 
15.  
16.        return new ImageInfo{ 
17.            FilePath = path, 
18.            FileName = Path.GetFileName(path), 
19.            IconImage = image, 
20.            IconName = Path.GetFileNameWithoutExtension(path), 
21.            TopOffset = 0, 
22.            Width = image.Width, 
23.            Height = image.Height, 
24.            IsAnimated = ImageAnimator.CanAnimate(image), 
25.        }; 
26.    }) 
27.    .OrderBy(info => info.IsAnimated) 
28.    .ToList(); 
29.  
30.  
31.  
32. /*檢查重複的圖檔名稱*/ 
33. List<string> repeatList = imageList.GroupBy(info => info.IconName) 
34.    .Where(g => g.Count() > 1) 
35.    .SelectMany(g => g.Select(x => x.FileName)) 
36.    .ToList(); 
37.  
38. if(repeatList.Count > 0){ 
39.    throw new Exception( 
40.        "出現重複的圖檔名稱[" + String.Join(", ", repeatList) + "]" 
41.    ); 
42. }    
43.  
44.  
45.  
46. /* 製作 CSS Sprite */ 
47. int sumHeight = imageList.Sum( info => info.Height); 
48. int spriteWidth = imageList.Max( info => info.Width); 
49. int spriteHeight = sumHeight + (imageList.Count - 1) * spriteGap; 
50.  
51. var bitmap = new Bitmap(spriteWidth, spriteHeight); 
52.  
53. using (Graphics graphics = Graphics.FromImage(bitmap)) 
54. {            
55.    int nextTop = 0; 
56.    for(int i=0; i< imageList.Count; i++){ 
57.        /*忽略具有動畫的 GIF 圖片*/  
58.        if(imageList[i].IsAnimated){ continue; }  
59.  
60.        imageList[i].TopOffset = nextTop; 
61.  
62.        graphics.DrawImage(imageList[i].IconImage, 0, nextTop); 
63.  
64.        nextTop = nextTop + imageList[i].Height + spriteGap; 
65.    } 
66.  
67.    graphics.Save(); 
68. } 
69.  
70. SaveOutput("icons.sprite.png");  
71. bitmap.Save( 
72.    Path.Combine(workDirectory, "icons.sprite.png"),  
73.    ImageFormat.Png 
74. ); 
75. bitmap.Dispose(); 

int spriteGap = 30;  
var scanTypes = new string[]{".jpg", ".gif", ".png"};

string workDirectory = 
    Path.GetDirectoryName(this.Host.TemplateFile);


/* 取得圖檔資訊 */  
List<ImageInfo> imageList = Directory
    .EnumerateFiles(Path.Combine(workDirectory, "icons"))
    .Where(path => scanTypes.Contains(Path.GetExtension(path)))
    .Select(path => 
    {
        var image = Image.FromFile(path);

        return new ImageInfo{
            FilePath = path,
            FileName = Path.GetFileName(path),
            IconImage = image,
            IconName = Path.GetFileNameWithoutExtension(path),
            TopOffset = 0,
            Width = image.Width,
            Height = image.Height,
            IsAnimated = ImageAnimator.CanAnimate(image),
        };
    })
    .OrderBy(info => info.IsAnimated)
    .ToList();



/*檢查重複的圖檔名稱*/
List<string> repeatList = imageList.GroupBy(info => info.IconName)
    .Where(g => g.Count() > 1)
    .SelectMany(g => g.Select(x => x.FileName))
    .ToList();

if(repeatList.Count > 0){
    throw new Exception(
        "出現重複的圖檔名稱[" + String.Join(", ", repeatList) + "]"
    );
}   



/* 製作 CSS Sprite */
int sumHeight = imageList.Sum( info => info.Height);
int spriteWidth = imageList.Max( info => info.Width);
int spriteHeight = sumHeight + (imageList.Count - 1) * spriteGap;

var bitmap = new Bitmap(spriteWidth, spriteHeight);

using (Graphics graphics = Graphics.FromImage(bitmap))
{           
    int nextTop = 0;
    for(int i=0; i< imageList.Count; i++){
        /*忽略具有動畫的 GIF 圖片*/ 
        if(imageList[i].IsAnimated){ continue; } 

        imageList[i].TopOffset = nextTop;
        
        graphics.DrawImage(imageList[i].IconImage, 0, nextTop);
            
        nextTop = nextTop + imageList[i].Height + spriteGap;
    }
        
    graphics.Save();
}

SaveOutput("icons.sprite.png"); 
bitmap.Save(
    Path.Combine(workDirectory, "icons.sprite.png"), 
    ImageFormat.Png
);
bitmap.Dispose();

下載完整程式： t4_make_icons_css.zip