func convert(mw *imagick.MagickWand, request *ZRequest) error {
fmt.Println("【zscale】：调用convert()方法......处理图片参数")
var result error
result = nil
mw.ResetIterator()
mw.SetImageOrientation(imagick.ORIENTATION_TOP_LEFT)
x := request.X
y := request.Y
cols := uint(request.Width)
rows := uint(request.Height)
fmt.Sprintf("image cols %d, rows %d \n", cols, rows)
if !(cols == 0 && rows == 0) {
//fmt.Println("call crop&scal function......")
/* crop and scale */
if x == -1 && y == -1 {
// fmt.Println("call crop&scal function......")
// fmt.Print(fmt.Sprintf("proportion(im, %d, %d, %d) \n", request.Proportion, cols, rows))
result = proportion(mw, request.Proportion, cols, rows)
if result != nil {
return result
}
} else {
// fmt.Print(fmt.Sprintf("crop(im, %d, %d, %d, %d) \n", x, y, cols, rows))
result = crop(mw, x, y, cols, rows)
if result != nil {
return result
}
}
}
/* rotate image */
if request.Rotate != 0 {
// fmt.Print(fmt.Sprintf("wi_rotate(im, %d) \n", request.Rotate))
background := imagick.NewPixelWand()
if background == nil {
result = fmt.Errorf("init new pixelwand faile.")
return result
}
defer background.Destroy()
isOk := background.SetColor("#ffffff")
if !isOk {
result = fmt.Errorf("set background color faile.")
return result
}
result = mw.RotateImage(background, float64(request.Rotate))
if result != nil {
return result
}
}
/* set gray */
if request.Gary == 1 {
// fmt.Print(fmt.Sprintf("wi_gray(im) \n"))
result = mw.SetImageType(imagick.IMAGE_TYPE_GRAYSCALE)
if result != nil {
return result
}
}
/* set quality */
//fmt.Print(fmt.Sprintf("wi_set_quality(im, %d) \n", request.Quality))
result = mw.SetImageCompressionQuality(uint(request.Quality))
if result != nil {
return result
}
/* set format */
if "none" != request.Format {
// fmt.Print(fmt.Sprintf("wi_set_format(im, %s) \n", request.Format))
result = mw.SetImageFormat(request.Format)
if result != nil {
return result
}
}
//fmt.Print(fmt.Sprintf("convert(im, req) %s \n", result))
return result
}