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/*
* Copyright (C) 2014 ~ 2018 Deepin Technology Co., Ltd.
*
* Author: jouyouyun <jouyouwen717@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package graphic
import (
"fmt"
"image"
"image/draw"
)
// ClipImage clip image file that format is recognized and save it with target format.
func ClipImage(srcfile, dstfile string, x, y, w, h int, f Format) (err error) {
srcimg, err := LoadImage(srcfile)
if err != nil {
return
}
dstimg := Clip(srcimg, x, y, w, h)
err = SaveImage(dstfile, dstimg, f)
dstimg.Pix = nil
return
}
// ClipImageCache clip any recognized format image and save to cache
// directory, if already exists, just return it.
func ClipImageCache(srcfile string, x, y, w, h int, f Format) (dstfile string, useCache bool, err error) {
dstfile = generateCacheFilePath(fmt.Sprintf("ClipImageCache%s%d%d%d%d%s", srcfile, x, y, w, h, f))
if isFileExists(dstfile) {
useCache = true
return
}
err = ClipImage(srcfile, dstfile, x, y, w, h, f)
return
}
// ClipImage clip image object.
func Clip(srcimg image.Image, x, y, w, h int) (dstimg *image.RGBA) {
dstimg = image.NewRGBA(image.Rect(0, 0, w, h))
draw.Draw(dstimg, dstimg.Bounds(), srcimg, image.Point{x, y}, draw.Src)
return
}
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