add skip crop if limit reached

internal/converter/converter.go

@@ -114,6 +114,7 @@ func (c *Converter) InitParse() {
 	c.AddIntParam(&c.Options.CropRatioRight, "crop-ratio-right", c.Options.CropRatioRight, "Crop ratio right: ratio of pixels allow to be non blank while cutting on the right.")
 	c.AddIntParam(&c.Options.CropRatioBottom, "crop-ratio-bottom", c.Options.CropRatioBottom, "Crop ratio bottom: ratio of pixels allow to be non blank while cutting on the bottom.")
 	c.AddIntParam(&c.Options.CropLimit, "crop-limit", c.Options.CropLimit, "Crop limit: maximum number of cropping in percentage allowed. 0 mean unlimited.")
+	c.AddBoolParam(&c.Options.CropSkipIfLimitReached, "crop-skip-if-limit-reached", c.Options.CropSkipIfLimitReached, "Crop skip if limit reached.")
 	c.AddIntParam(&c.Options.Brightness, "brightness", c.Options.Brightness, "Brightness readjustment: between -100 and 100, > 0 lighter, < 0 darker")
 	c.AddIntParam(&c.Options.Contrast, "contrast", c.Options.Contrast, "Contrast readjustment: between -100 and 100, > 0 more contrast, < 0 less contrast")
 	c.AddBoolParam(&c.Options.AutoContrast, "autocontrast", c.Options.AutoContrast, "Improve contrast automatically")

internal/converter/options/converter_options.go

@@ -31,6 +31,7 @@ type Options struct {
 	CropRatioRight             int     `yaml:"crop_ratio_right"`
 	CropRatioBottom            int     `yaml:"crop_ratio_bottom"`
 	CropLimit                  int     `yaml:"crop_limit"`
+	CropSkipIfLimitReached     bool    `yaml:"crop_skip_if_limit_reached"`
 	Brightness                 int     `yaml:"brightness"`
 	Contrast                   int     `yaml:"contrast"`
 	AutoContrast               bool    `yaml:"auto_contrast"`
@@ -81,23 +82,25 @@ type Options struct {
 // New Initialize default options.
 func New() *Options {
 	return &Options{
-		Profile:               "SR",
+		Profile:                "SR",
-		Quality:               85,
+		Quality:                85,
-		Grayscale:             true,
+		Grayscale:              true,
-		Crop:                  true,
+		Crop:                   true,
-		CropRatioLeft:         1,
+		CropRatioLeft:          1,
-		CropRatioUp:           1,
+		CropRatioUp:            1,
-		CropRatioRight:        1,
+		CropRatioRight:         1,
-		CropRatioBottom:       3,
+		CropRatioBottom:        3,
-		NoBlankImage:          true,
+		CropLimit:              10,
-		HasCover:              true,
+		CropSkipIfLimitReached: true,
-		KeepDoublePageIfSplit: true,
+		NoBlankImage:           true,
-		SortPathMode:          1,
+		HasCover:               true,
-		ForegroundColor:       "000",
+		KeepDoublePageIfSplit:  true,
-		BackgroundColor:       "FFF",
+		SortPathMode:           1,
-		Format:                "jpeg",
+		ForegroundColor:        "000",
-		TitlePage:             1,
+		BackgroundColor:        "FFF",
-		profiles:              profiles.New(),
+		Format:                 "jpeg",
+		TitlePage:              1,
+		profiles:               profiles.New(),
 	}
 }
 
@@ -164,6 +167,7 @@ func (o *Options) MarshalJSON() ([]byte, error) {
 			"bottom": o.CropRatioBottom,
 		}
 		out["crop_limit"] = o.CropLimit
+		out["crop_skip_if_limit_reached"] = o.CropSkipIfLimitReached
 	}
 	if o.Brightness != 0 {
 		out["brightness"] = o.Brightness
@@ -268,7 +272,7 @@ func (o *Options) ShowConfig() string {
 		{"Grayscale", o.Grayscale, true},
 		{"Grayscale mode", grayscaleMode, o.Grayscale},
 		{"Crop", o.Crop, true},
-		{"Crop ratio", fmt.Sprintf("%d Left - %d Up - %d Right - %d Bottom - Limit %d%%", o.CropRatioLeft, o.CropRatioUp, o.CropRatioRight, o.CropRatioBottom, o.CropLimit), o.Crop},
+		{"Crop ratio", fmt.Sprintf("%d Left - %d Up - %d Right - %d Bottom - Limit %d%% - Skip %v", o.CropRatioLeft, o.CropRatioUp, o.CropRatioRight, o.CropRatioBottom, o.CropLimit, o.CropSkipIfLimitReached), o.Crop},
 		{"Brightness", o.Brightness, o.Brightness != 0},
 		{"Contrast", o.Contrast, o.Contrast != 0},
 		{"Auto contrast", o.AutoContrast, true},

internal/epub/imagefilters/epub_image_filters_autocrop.go

@@ -8,9 +8,9 @@ import (
 )
 
 // AutoCrop Lookup for margin and crop
-func AutoCrop(img image.Image, bounds image.Rectangle, cutRatioLeft, cutRatioUp, cutRatioRight, cutRatioBottom int, limit int) gift.Filter {
+func AutoCrop(img image.Image, bounds image.Rectangle, cutRatioLeft, cutRatioUp, cutRatioRight, cutRatioBottom int, limit int, skipIfLimitReached bool) gift.Filter {
 	return gift.Crop(
-		findMargin(img, bounds, cutRatioOptions{cutRatioLeft, cutRatioUp, cutRatioRight, cutRatioBottom}, limit),
+		findMargin(img, bounds, cutRatioOptions{cutRatioLeft, cutRatioUp, cutRatioRight, cutRatioBottom}, limit, skipIfLimitReached),
 	)
 }
 
@@ -25,13 +25,13 @@ type cutRatioOptions struct {
 	Left, Up, Right, Bottom int
 }
 
-func findMargin(img image.Image, bounds image.Rectangle, cutRatio cutRatioOptions, limit int) image.Rectangle {
+func findMargin(img image.Image, bounds image.Rectangle, cutRatio cutRatioOptions, limit int, skipIfLimitReached bool) image.Rectangle {
 	imgArea := bounds
 
-	maxCutX, maxCutY := imgArea.Dx()*limit/100, imgArea.Dy()*limit/100
+	maxCropX, maxCropY := imgArea.Dx()*limit/100, imgArea.Dy()*limit/100
 
 LEFT:
-	for x, maxCut := imgArea.Min.X, maxCutX; x < imgArea.Max.X && (maxCutX == 0 || maxCut > 0); x, maxCut = x+1, maxCut-1 {
+	for x, maxCrop := imgArea.Min.X, maxCropX; x < imgArea.Max.X && (limit == 0 || maxCrop > 0); x, maxCrop = x+1, maxCrop-1 {
 		allowNonBlank := imgArea.Dy() * cutRatio.Left / 100
 		for y := imgArea.Min.Y; y < imgArea.Max.Y; y++ {
 			if !colorIsBlank(img.At(x, y)) {
@@ -42,10 +42,13 @@ LEFT:
 			}
 		}
 		imgArea.Min.X++
+		if limit > 0 && maxCrop == 1 && skipIfLimitReached {
+			return bounds
+		}
 	}
 
 UP:
-	for y, maxCut := imgArea.Min.Y, maxCutY; y < imgArea.Max.Y && (maxCutY == 0 || maxCut > 0); y, maxCut = y+1, maxCut-1 {
+	for y, maxCrop := imgArea.Min.Y, maxCropY; y < imgArea.Max.Y && (limit == 0 || maxCrop > 0); y, maxCrop = y+1, maxCrop-1 {
 		allowNonBlank := imgArea.Dx() * cutRatio.Up / 100
 		for x := imgArea.Min.X; x < imgArea.Max.X; x++ {
 			if !colorIsBlank(img.At(x, y)) {
@@ -56,10 +59,13 @@ UP:
 			}
 		}
 		imgArea.Min.Y++
+		if limit > 0 && maxCrop == 1 && skipIfLimitReached {
+			return bounds
+		}
 	}
 
 RIGHT:
-	for x, maxCut := imgArea.Max.X-1, maxCutX; x >= imgArea.Min.X && (maxCutX == 0 || maxCut > 0); x, maxCut = x-1, maxCut-1 {
+	for x, maxCrop := imgArea.Max.X-1, maxCropX; x >= imgArea.Min.X && (limit == 0 || maxCrop > 0); x, maxCrop = x-1, maxCrop-1 {
 		allowNonBlank := imgArea.Dy() * cutRatio.Right / 100
 		for y := imgArea.Min.Y; y < imgArea.Max.Y; y++ {
 			if !colorIsBlank(img.At(x, y)) {
@@ -70,10 +76,13 @@ RIGHT:
 			}
 		}
 		imgArea.Max.X--
+		if limit > 0 && maxCrop == 1 && skipIfLimitReached {
+			return bounds
+		}
 	}
 
 BOTTOM:
-	for y, maxCut := imgArea.Max.Y-1, maxCutY; y >= imgArea.Min.Y && (maxCutY == 0 || maxCut > 0); y, maxCut = y-1, maxCut-1 {
+	for y, maxCrop := imgArea.Max.Y-1, maxCropY; y >= imgArea.Min.Y && (limit == 0 || maxCrop > 0); y, maxCrop = y-1, maxCrop-1 {
 		allowNonBlank := imgArea.Dx() * cutRatio.Bottom / 100
 		for x := imgArea.Min.X; x < imgArea.Max.X; x++ {
 			if !colorIsBlank(img.At(x, y)) {
@@ -84,6 +93,9 @@ BOTTOM:
 			}
 		}
 		imgArea.Max.Y--
+		if limit > 0 && maxCrop == 1 && skipIfLimitReached {
+			return bounds
+		}
 	}
 
 	return imgArea

internal/epub/imageprocessor/epub_image_processor.go

@@ -191,6 +191,7 @@ func (e *EPUBImageProcessor) transformImage(input *task, part int, right bool) *
 			e.Image.Crop.Right,
 			e.Image.Crop.Bottom,
 			e.Image.Crop.Limit,
+			e.Image.Crop.SkipIfLimitReached,
 		)
 
 		// detect if blank image

internal/epub/options/epub_options.go

@@ -7,6 +7,7 @@ type Crop struct {
 	Enabled                 bool
 	Left, Up, Right, Bottom int
 	Limit                   int
+	SkipIfLimitReached      bool
 }
 
 type Color struct {

main.go

@@ -124,12 +124,13 @@ $ go install github.com/celogeek/go-comic-converter/v%d@%s
 		Json:                       cmd.Options.Json,
 		Image: &epuboptions.Image{
 			Crop: &epuboptions.Crop{
-				Enabled: cmd.Options.Crop,
+				Enabled:            cmd.Options.Crop,
-				Left:    cmd.Options.CropRatioLeft,
+				Left:               cmd.Options.CropRatioLeft,
-				Up:      cmd.Options.CropRatioUp,
+				Up:                 cmd.Options.CropRatioUp,
-				Right:   cmd.Options.CropRatioRight,
+				Right:              cmd.Options.CropRatioRight,
-				Bottom:  cmd.Options.CropRatioBottom,
+				Bottom:             cmd.Options.CropRatioBottom,
-				Limit:   cmd.Options.CropLimit,
+				Limit:              cmd.Options.CropLimit,
+				SkipIfLimitReached: cmd.Options.CropSkipIfLimitReached,
 			},
 			Quality:               cmd.Options.Quality,
 			Brightness:            cmd.Options.Brightness,