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 calcDnR(image *imagick.MagickWand) (d uint, r float64) {
width := image.GetImageWidth()
height := image.GetImageHeight()
if height > width {
d = width / minChunksPerSide
} else {
d = height / minChunksPerSide
}
r = float64(d) / 2
return
}
func (i *Image) resize(wand *imagick.MagickWand, w, h uint) {
ow := wand.GetImageWidth()
oh := wand.GetImageHeight()
if (float64(ow) / float64(oh)) < (float64(w) / float64(h)) {
h = oh * w / ow
} else {
w = ow * h / oh
}
wand.SetImageInterpolateMethod(imagick.INTERPOLATE_PIXEL_BICUBIC)
wand.ResizeImage(w, h, imagick.FILTER_LANCZOS2_SHARP, 1)
}
func resizeImage(wand *imagick.MagickWand, size int, mozaic bool) *imagick.MagickWand {
width := float32(wand.GetImageWidth())
height := float32(wand.GetImageHeight())
var rate float32
if width > height {
rate = float32(size) / width
} else {
rate = float32(size) / height
}
if mozaic {
wand.ResizeImage(uint(width*rate/20), uint(height*rate/20), imagick.FILTER_LANCZOS, 1)
wand.ResizeImage(uint(width*rate), uint(height*rate), imagick.FILTER_POINT, 1)
} else {
wand.ResizeImage(uint(width*rate), uint(height*rate), imagick.FILTER_LANCZOS, 1)
}
return wand.GetImage()
}
func speedLine(mw *imagick.MagickWand, aw *imagick.MagickWand) error {
cols, rows := mw.GetImageHeight(), mw.GetImageWidth()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
cw := imagick.NewPixelWand()
cw.SetColor(*color)
dw.SetFillColor(cw)
center := []float64{float64(rows) / 2.0, float64(cols) / 2.0}
const radiusCenter float64 = 0.75
const step float64 = 0.02
const bold float64 = 1.0
var theeta float64
for theeta < math.Pi*2 {
stepNoise := rand.Float64() + 0.5
theeta += step * stepNoise
radiusCenterNoise := rand.Float64()*0.3 + 1.0
boldNoise := rand.Float64() + 0.7 + 0.3
point0 := imagick.PointInfo{
X: math.Sin(theeta)*center[0]*radiusCenter*radiusCenterNoise + center[0],
Y: math.Cos(theeta)*center[1]*radiusCenter*radiusCenterNoise + center[1],
}
point1 := imagick.PointInfo{
X: math.Sin(theeta)*center[0]*2 + center[0],
Y: math.Cos(theeta)*center[1]*2 + center[1],
}
point2 := imagick.PointInfo{
X: math.Sin(theeta+step*bold*boldNoise)*center[0]*2 + center[0],
Y: math.Cos(theeta+step*bold*boldNoise)*center[1]*2 + center[1],
}
dw.Polygon([]imagick.PointInfo{point0, point1, point2})
}
if err := aw.DrawImage(dw); err != nil {
return err
}
return nil
}
func resize(mw *imagick.MagickWand, geo btcdn.GeoBox) (err error) {
var height uint
width := geo.Width()
baseWidth := int(mw.GetImageWidth())
if width > baseWidth {
width = baseWidth
}
if geo.Mode() == "!" {
height = uint(geo.Height())
} else {
ratio := heightToWidthRatio(mw)
height = uint((float64)(width) * ratio)
}
err = mw.ResizeImage(uint(width), height, imagick.FILTER_LANCZOS, 1)
if err != nil {
return
}
return
}
func tileLineImage(wand *imagick.MagickWand) {
it := wand.NewPixelIterator()
it.SetLastIteratorRow()
width := float32(wand.GetImageWidth())
height := float32(wand.GetImageHeight())
heightRemain := float32(int(height / 20))
if heightRemain != 0 {
heightRemain = height/float32(heightRemain) - 20
}
widthRemain := float32(int(width / 20))
if widthRemain != 0 {
widthRemain = width/float32(widthRemain) - 20
}
cnt := it.GetIteratorRow()
it.SetFirstIteratorRow()
heightCount := 0
nextHeight := 21
hLineCount := 0
hRemainCount := heightRemain
widthCount := 0
nextWidth := 21
wLineCount := 0
wRemainCount := widthRemain
for i := 0; i <= cnt; i++ {
heightCount++
it.SetIteratorRow(i)
pws := it.GetCurrentIteratorRow()
if nextHeight-heightCount < 2 {
for j := 0; j < len(pws); j++ {
pws[j].SetColor("#ffffff")
}
if nextHeight == heightCount {
heightCount = 0
hLineCount++
hRemainCount += heightRemain
if hRemainCount > 1 {
hRemainCount -= 1
nextHeight = 21
} else {
nextHeight = 20
}
}
} else {
for j := 0; j < len(pws); j++ {
widthCount++
if nextWidth-widthCount < 2 {
pws[j].SetColor("#ffffff")
if nextWidth == widthCount {
widthCount = 0
wLineCount++
wRemainCount += widthRemain
if wRemainCount > 1 {
wRemainCount -= 1
nextWidth = 21
} else {
nextWidth = 20
}
}
}
// if j % 20 < 2 {
// pws[j].SetColor("#ffffff")
// }
}
}
it.SyncIterator()
}
}
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
}
// Returns an the width and height of magick wand
func getDimensions(wand *imagick.MagickWand) (w, h uint) {
h = wand.GetImageHeight()
w = wand.GetImageWidth()
return
}
func heightToWidthRatio(im *imagick.MagickWand) float64 {
return (float64)(im.GetImageHeight()) / (float64)(im.GetImageWidth())
}
func resizeRatio(im *imagick.MagickWand, width, height int) float64 {
return math.Abs((float64)(width*height) / (float64)(im.GetImageWidth()*im.GetImageHeight()))
}