| 89 | } |
| 90 | |
| 91 | func main() { |
| 92 | // parse and validate arguments |
| 93 | flag.Parse() |
| 94 | ok := true |
| 95 | if Input == "" { |
| 96 | ok = errorMessage("ERROR: input argument required") |
| 97 | } |
| 98 | if len(Outputs) == 0 { |
| 99 | ok = errorMessage("ERROR: output argument required") |
| 100 | } |
| 101 | if len(Configs) == 0 { |
| 102 | ok = errorMessage("ERROR: number argument required") |
| 103 | } |
| 104 | if len(Configs) == 1 { |
| 105 | Configs[0].Mode = Mode |
| 106 | Configs[0].Alpha = Alpha |
| 107 | Configs[0].Repeat = Repeat |
| 108 | } |
| 109 | for _, config := range Configs { |
| 110 | if config.Count < 1 { |
| 111 | ok = errorMessage("ERROR: number argument must be > 0") |
| 112 | } |
| 113 | } |
| 114 | if !ok { |
| 115 | fmt.Println("Usage: primitive [OPTIONS] -i input -o output -n count") |
| 116 | flag.PrintDefaults() |
| 117 | os.Exit(1) |
| 118 | } |
| 119 | |
| 120 | // set log level |
| 121 | if V { |
| 122 | primitive.LogLevel = 1 |
| 123 | } |
| 124 | if VV { |
| 125 | primitive.LogLevel = 2 |
| 126 | } |
| 127 | |
| 128 | // seed random number generator |
| 129 | rand.Seed(time.Now().UTC().UnixNano()) |
| 130 | |
| 131 | // determine worker count |
| 132 | if Workers < 1 { |
| 133 | Workers = runtime.NumCPU() |
| 134 | } |
| 135 | |
| 136 | // read input image |
| 137 | primitive.Log(1, "reading %s\n", Input) |
| 138 | input, err := primitive.LoadImage(Input) |
| 139 | check(err) |
| 140 | |
| 141 | // scale down input image if needed |
| 142 | size := uint(InputSize) |
| 143 | if size > 0 { |
| 144 | input = resize.Thumbnail(size, size, input, resize.Bilinear) |
| 145 | } |
| 146 | |
| 147 | // determine background color |
| 148 | var bg primitive.Color |
