func crop(mw *imagick.MagickWand, x, y int, cols, rows uint) error {
var result error
result = nil
imCols := mw.GetImageWidth()
imRows := mw.GetImageHeight()
if x < 0 {
x = 0
}
if y < 0 {
y = 0
}
if uint(x) >= imCols || uint(y) >= imRows {
result = fmt.Errorf("x, y more than image cols, rows")
return result
}
if cols == 0 || imCols < uint(x)+cols {
cols = imCols - uint(x)
}
if rows == 0 || imRows < uint(y)+rows {
rows = imRows - uint(y)
}
fmt.Print(fmt.Sprintf("wi_crop(im, %d, %d, %d, %d)\n", x, y, cols, rows))
result = mw.CropImage(cols, rows, x, y)
return result
}
func crop(mw *imagick.MagickWand, geo btcdn.GeoBox) (err error) {
offsetX, offsetY, err := calculateGravityOffsets(int(mw.GetImageWidth()), int(mw.GetImageHeight()), geo)
if err != nil {
return
}
err = mw.CropImage(uint(geo.Width()), uint(geo.Height()), offsetX, offsetY)
if err != nil {
return
}
return
}
func proportion(mw *imagick.MagickWand, proportion int, cols uint, rows uint) error {
var result error
result = nil
imCols := mw.GetImageWidth()
imRows := mw.GetImageHeight()
if proportion == 0 {
fmt.Sprintf("p=0, wi_scale(im, %d, %d)\n", cols, rows)
result = mw.ResizeImage(cols, rows, imagick.FILTER_UNDEFINED, 1.0)
} else if proportion == 1 {
if cols == 0 || rows == 0 {
if cols > 0 {
rows = uint(round(float64((cols / imCols) * imRows)))
} else {
cols = uint(round(float64((rows / imRows) * imCols)))
}
fmt.Sprintf("p=1, wi_scale(im, %d, %d)\n", cols, rows)
result = mw.ResizeImage(cols, rows, imagick.FILTER_UNDEFINED, 1.0)
} else {
var x, y, sCols, sRows uint
x, y = 0, 0
colsRate := cols / imCols
rowsRate := rows / imRows
if colsRate > rowsRate {
sCols = cols
sRows = uint(round(float64(colsRate * imRows)))
y = uint(math.Floor(float64((sRows - rows) / 2.0)))
} else {
sCols = uint(round(float64(rowsRate * imCols)))
sRows = rows
x = uint(math.Floor(float64((sCols - cols) / 2.0)))
}
fmt.Sprintf("p=2, wi_scale(im, %d, %d)\n", sCols, sRows)
result = mw.ResizeImage(sCols, sRows, imagick.FILTER_UNDEFINED, 1.0)
fmt.Sprintf("p=2, wi_crop(im, %d, %d, %d, %d)\n", x, y, cols, rows)
result = mw.CropImage(cols, rows, int(x), int(y))
}
} else if proportion == 2 {
x := int(math.Floor(float64((imCols - cols) / 2.0)))
y := int(math.Floor(float64((imRows - rows) / 2.0)))
fmt.Sprintf("p=3, wi_crop(im, %d, %d, %d, %d)\n", x, y, cols, rows)
result = mw.CropImage(cols, rows, x, y)
} else if proportion == 3 {
if cols == 0 || rows == 0 {
var rate uint
if cols > 0 {
rate = cols
} else {
rate = rows
}
rows = uint(round(float64(imRows * rate / 100)))
cols = uint(round(float64(imCols * rate / 100)))
fmt.Sprintf("p=3, wi_scale(im, %d, %d)\n", cols, rows)
result = mw.ResizeImage(cols, rows, imagick.FILTER_UNDEFINED, 1.0)
} else {
rows = uint(round(float64(imRows * rows / 100)))
cols = uint(round(float64(imCols * cols / 100)))
fmt.Sprintf("p=3, wi_scale(im, %d, %d)\n", cols, rows)
result = mw.ResizeImage(cols, rows, imagick.FILTER_UNDEFINED, 1.0)
}
} else if proportion == 4 {
var rate float64
rate = 1.0
if cols == 0 || rows == 0 {
if cols > 0 {
rate = float64(cols / imCols)
} else {
rate = float64(rows / imRows)
}
} else {
rateCol := cols / imCols
rateRow := rows / imRows
if rateCol < rateRow {
rate = float64(rateCol)
} else {
rate = float64(rateRow)
}
}
cols = uint(round(float64(float64(imCols) * rate)))
rows = uint(round(float64(float64(imRows) * rate)))
fmt.Sprintf("p=4, wi_scale(im, %d, %d)\n", cols, rows)
result = mw.ResizeImage(cols, rows, imagick.FILTER_UNDEFINED, 1.0)
}
return result
}