vendor: add github.com/muesli/smartcrop and deps

vendor/github.com/muesli/smartcrop/debug.go

@@ -0,0 +1,107 @@
+/*
+ * Copyright (c) 2014 Christian Muehlhaeuser
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ *
+ *	Authors:
+ *		Christian Muehlhaeuser <muesli@gmail.com>
+ *		Michael Wendland <michael@michiwend.com>
+ */
+
+/*
+Package smartcrop implements a content aware image cropping library based on
+Jonas Wagner's smartcrop.js https://github.com/jwagner/smartcrop.js
+*/
+package smartcrop
+
+import (
+	"errors"
+	"image"
+	"image/color"
+	"image/jpeg"
+	"image/png"
+	"os"
+	"path/filepath"
+)
+
+func debugOutput(debug bool, img *image.RGBA, debugType string) {
+	if debug {
+		writeImage("png", img, "./smartcrop_"+debugType+".png")
+	}
+}
+
+func writeImage(imgtype string, img image.Image, name string) error {
+	if err := os.MkdirAll(filepath.Dir(name), 0755); err != nil {
+		panic(err)
+	}
+
+	switch imgtype {
+	case "png":
+		return writeImageToPng(img, name)
+	case "jpeg":
+		return writeImageToJpeg(img, name)
+	}
+
+	return errors.New("Unknown image type")
+}
+
+func writeImageToJpeg(img image.Image, name string) error {
+	fso, err := os.Create(name)
+	if err != nil {
+		return err
+	}
+	defer fso.Close()
+
+	return jpeg.Encode(fso, img, &jpeg.Options{Quality: 100})
+}
+
+func writeImageToPng(img image.Image, name string) error {
+	fso, err := os.Create(name)
+	if err != nil {
+		return err
+	}
+	defer fso.Close()
+
+	return png.Encode(fso, img)
+}
+
+func drawDebugCrop(topCrop Crop, o *image.RGBA) {
+	width := o.Bounds().Dx()
+	height := o.Bounds().Dy()
+
+	for y := 0; y < height; y++ {
+		for x := 0; x < width; x++ {
+			r, g, b, _ := o.At(x, y).RGBA()
+			r8 := float64(r >> 8)
+			g8 := float64(g >> 8)
+			b8 := uint8(b >> 8)
+
+			imp := importance(topCrop, x, y)
+
+			if imp > 0 {
+				g8 += imp * 32
+			} else if imp < 0 {
+				r8 += imp * -64
+			}
+
+			nc := color.RGBA{uint8(bounds(r8)), uint8(bounds(g8)), b8, 255}
+			o.SetRGBA(x, y, nc)
+		}
+	}
+}