Function ParseOptions

data.go:252–309

ParseOptions parses str as a list of comma separated transformation options. The options can be specified in in order, with duplicate options overwriting previous values. # Rectangle Crop There are four options controlling rectangle crop: cx{x} - X coordinate of top left rectangle corner (d

(str string)

//	cw100,ch100 - crop image to 100px square, starting at (0,0)
//	cx10,cy20,cw100,ch200 - crop image starting at (10,20) is 100px wide and 200px tall
func ParseOptions(str string) Options {
	var options Options

	for _, opt := range strings.Split(str, ",") {
		switch {
		case len(opt) == 0: // do nothing
		case opt == optFit:
			options.Fit = true
		case opt == optFlipVertical:
			options.FlipVertical = true
		case opt == optFlipHorizontal:
			options.FlipHorizontal = true
		case opt == optScaleUp: // this option is intentionally not documented above
			options.ScaleUp = true
		case opt == optFormatJPEG, opt == optFormatPNG, opt == optFormatTIFF:
			options.Format = opt
		case opt == optSmartCrop:
			options.SmartCrop = true
		case opt == optTrim:
			options.Trim = true
		case strings.HasPrefix(opt, optRotatePrefix):
			value := strings.TrimPrefix(opt, optRotatePrefix)
			options.Rotate, _ = strconv.Atoi(value)
		case strings.HasPrefix(opt, optQualityPrefix):
			value := strings.TrimPrefix(opt, optQualityPrefix)
			options.Quality, _ = strconv.Atoi(value)
		case strings.HasPrefix(opt, optSignaturePrefix):
			options.Signature = strings.TrimPrefix(opt, optSignaturePrefix)
		case strings.HasPrefix(opt, optCropX):
			value := strings.TrimPrefix(opt, optCropX)
			options.CropX, _ = strconv.ParseFloat(value, 64)
		case strings.HasPrefix(opt, optCropY):
			value := strings.TrimPrefix(opt, optCropY)
			options.CropY, _ = strconv.ParseFloat(value, 64)
		case strings.HasPrefix(opt, optCropWidth):
			value := strings.TrimPrefix(opt, optCropWidth)
			options.CropWidth, _ = strconv.ParseFloat(value, 64)
		case strings.HasPrefix(opt, optCropHeight):
			value := strings.TrimPrefix(opt, optCropHeight)
			options.CropHeight, _ = strconv.ParseFloat(value, 64)
		case strings.Contains(opt, optSizeDelimiter):
			size := strings.SplitN(opt, optSizeDelimiter, 2)
			if w := size[0]; w != "" {
				options.Width, _ = strconv.ParseFloat(w, 64)
			}
			if h := size[1]; h != "" {
				options.Height, _ = strconv.ParseFloat(h, 64)
			}
		default:
			if size, err := strconv.ParseFloat(opt, 64); err == nil {
				options.Width = size
				options.Height = size
			}
		}
	}

	return options
}