// Set up the drawingwand "dw" for the given font name, font size, and colour.
// If the font or size changes sx get the new width of a space
// (the magickwand is required if it is necessary to query the font metrics)
func draw_setfont(mw *imagick.MagickWand, dw *imagick.DrawingWand, font string, size float64, colour string, sx *float64) {
sflag := false
if len(font) > 0 {
dw.SetFont(font)
sflag = true
}
if len(colour) > 0 {
pw := imagick.NewPixelWand()
pw.SetColor(colour)
dw.SetFillColor(pw)
pw.Destroy()
sflag = true
}
if size > 0 {
dw.SetFontSize(size)
}
// If either the font or the fontsize (or both) have changed
// we need to get the size of a space again
if sflag {
fm := mw.QueryFontMetrics(dw, " ")
*sx = fm.TextWidth
}
}
func glitchImage(wand *imagick.MagickWand, q url.Values) ([]byte, error) {
data := wand.GetImage().GetImageBlob()
jpgHeaderLength := getJpegHeaderSize(data)
maxIndex := len(data) - jpgHeaderLength - 4
params := getParams(q)
length := int(params["iterations"])
for i := 0; i < length; i++ {
pxMin := math.Floor(float64(maxIndex) / params["iterations"] * float64(i))
pxMax := math.Floor(float64(maxIndex) / params["iterations"] * float64((i + 1)))
delta := pxMax - pxMin
pxI := math.Floor(pxMin + delta*params["seed"])
if int(pxI) > maxIndex {
pxI = float64(maxIndex)
}
index := math.Floor(float64(jpgHeaderLength) + pxI)
data[int(index)] = byte(math.Floor(params["amount"] * float64(256)))
}
wand2 := imagick.NewMagickWand()
if err := wand2.ReadImageBlob(data); err != nil {
return nil, err
}
if err := wand2.SetImageFormat("PNG"); err != nil {
return nil, err
}
return wand2.GetImage().GetImageBlob(), nil
}
func createChunk(mask, image *imagick.MagickWand, x, y int) error {
if err := mask.CompositeImage(image, imagick.COMPOSITE_OP_SRC_IN, -x, -y); err != nil {
return err
// fmt.Sprintf("Chunking for (%d;%d) failed: %v", x, y, err)
}
if err := mask.WriteImage("tmp/" + strconv.Itoa(x) + "_" + strconv.Itoa(y) + ".png"); err != nil {
return err
// fmt.Sprintf("Saving chunk for (%d;%d) failed: %v", x, y, err)
}
return nil
}
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 (orientation *Orientation) Fix(wand *imagick.MagickWand) error {
if orientation.fn == nil {
return nil
}
if err := orientation.fn(wand); err != nil {
return err
}
if err := wand.SetImageOrientation(imagick.ORIENTATION_TOP_LEFT); err != nil {
return err
}
*orientation = Orientation{swapXY: false, flipX: false, flipY: false, fn: nil}
return nil
}
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 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 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
}
// Shrink an image so that its longest dimension is no longer than maxSize
func shrinkImage(wand *imagick.MagickWand, maxSize int) (w, h uint) {
w, h = getDimensions(wand)
shrinkBy := 1
if w >= h {
shrinkBy = int(w) / maxSize
} else {
shrinkBy = int(h) / maxSize
}
wand.AdaptiveResizeImage(
uint(int(w)/shrinkBy),
uint(int(h)/shrinkBy),
)
// Sharpen the image to bring back some of the color lost in the shrinking
wand.AdaptiveSharpenImage(0, AdaptiveSharpenVal)
w, h = getDimensions(wand)
return
}
// The easiest (?) way to handle vertical text placement is
// not to use gravity at all because then you know that all the text is
// placed relative to ImageMagick's (0,0) coordinate which is the top left of
// the screen and the baseline will be y=0.
func draw_metrics(mw *imagick.MagickWand, dw *imagick.DrawingWand, dx *float64, dy, sx float64, text string) {
mw.AnnotateImage(dw, *dx, dy, 0, text)
mw.DrawImage(dw)
// get the font metrics
fm := mw.QueryFontMetrics(dw, text)
if fm != nil {
// Adjust the new x coordinate
*dx += fm.TextWidth + sx
}
}
func drawMetrics(mw *imagick.MagickWand, dw *imagick.DrawingWand, dx *float64, text string) {
rotation := float64(random(-30, 30))
mw.AnnotateImage(dw, *dx, 35, rotation, text)
mw.DrawImage(dw)
// get the font metrics
fm := mw.QueryFontMetrics(dw, text)
if fm != nil {
// Adjust the new x coordinate
*dx += fm.TextWidth + 2
}
}
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 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
}
// make-tile creates a tileable image from an input image.
// ( +clone -flop ) +append ( +clone -flip ) -append -resize 50%
func make_tile(mw *imagick.MagickWand, outfile string) {
mwc := mw.Clone()
mwc.FlopImage()
mw.AddImage(mwc)
mwc.Destroy()
mwc = mw.AppendImages(false)
mwf := mwc.Clone()
mwf.FlipImage()
mwc.AddImage(mwf)
mwf.Destroy()
mwf = mwc.AppendImages(true)
w := mwf.GetImageWidth()
h := mwf.GetImageHeight()
// 1 = Don't blur or sharpen image
mwf.ResizeImage(w/2, h/2, imagick.FILTER_LANCZOS, 1)
mwf.WriteImage(outfile)
mwf.Destroy()
mwc.Destroy()
}
func (i *Image) sizeFrames(sz *imgry.Sizing) error {
var canvas *imagick.MagickWand
var bg *imagick.PixelWand
// Shortcut if there is nothing to size
if sz.Size.Equal(imgry.ZeroRect) && sz.CropBox.Equal(imgry.ZeroFloatingRect) {
return nil
}
coalesceAndDeconstruct := !sz.Flatten && i.mw.GetNumberImages() > 1
if coalesceAndDeconstruct {
i.mw = i.mw.CoalesceImages()
}
if sz.Canvas != nil {
// If the user requested a canvas.
canvas = imagick.NewMagickWand()
bg = imagick.NewPixelWand()
bg.SetColor("transparent")
defer func() {
bg.Destroy()
if canvas != nil && canvas != i.mw {
canvas.Destroy()
}
}()
}
i.mw.SetFirstIterator()
for n := true; n; n = i.mw.NextImage() {
pw, ph := int(i.mw.GetImageWidth()), int(i.mw.GetImageHeight())
srcSize := imgry.NewRect(pw, ph)
// Initial crop of the source image
cropBox, cropOrigin, err := sz.CalcCropBox(srcSize)
if err != nil {
return err
}
if cropBox != nil && cropOrigin != nil && !cropBox.Equal(imgry.ZeroRect) {
err := i.mw.CropImage(uint(cropBox.Width), uint(cropBox.Height), cropOrigin.X, cropOrigin.Y)
if err != nil {
return err
}
srcSize = cropBox
i.mw.ResetImagePage("")
}
// Resize the image
resizeRect, cropBox, cropOrigin := sz.CalcResizeRect(srcSize)
if resizeRect != nil && !resizeRect.Equal(imgry.ZeroRect) {
err := i.mw.ResizeImage(uint(resizeRect.Width), uint(resizeRect.Height), imagick.FILTER_LANCZOS, 1.0)
if err != nil {
return err
}
i.mw.ResetImagePage("")
}
// Perform any final crops from an operation
if cropBox != nil && cropOrigin != nil && !cropBox.Equal(imgry.ZeroRect) {
err := i.mw.CropImage(uint(cropBox.Width), uint(cropBox.Height), cropOrigin.X, cropOrigin.Y)
if err != nil {
return err
}
i.mw.ResetImagePage("")
}
// If we have a canvas we put the image at its center.
if canvas != nil {
canvas.NewImage(uint(sz.Canvas.Width), uint(sz.Canvas.Height), bg)
canvas.SetImageBackgroundColor(bg)
canvas.SetImageFormat(i.mw.GetImageFormat())
x := (sz.Canvas.Width - int(i.mw.GetImageWidth())) / 2
y := (sz.Canvas.Height - int(i.mw.GetImageHeight())) / 2
canvas.CompositeImage(i.mw, imagick.COMPOSITE_OP_OVER, x, y)
canvas.ResetImagePage("")
}
if sz.Flatten {
break
}
}
if canvas != nil {
i.mw.Destroy()
i.mw = canvas
}
if coalesceAndDeconstruct {
// Compares each frame of the image, removes pixels that are already on the
// background and updates offsets accordingly.
i.mw = i.mw.DeconstructImages()
}
return nil
}
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
}
func convert(mw *imagick.MagickWand, request *ZRequest) error {
fmt.Println("【zscale】：调用convert()方法......处理图片参数")
var result error
result = nil
mw.ResetIterator()
mw.SetImageOrientation(imagick.ORIENTATION_TOP_LEFT)
x := request.X
y := request.Y
cols := uint(request.Width)
rows := uint(request.Height)
fmt.Sprintf("image cols %d, rows %d \n", cols, rows)
if !(cols == 0 && rows == 0) {
//fmt.Println("call crop&scal function......")
/* crop and scale */
if x == -1 && y == -1 {
// fmt.Println("call crop&scal function......")
// fmt.Print(fmt.Sprintf("proportion(im, %d, %d, %d) \n", request.Proportion, cols, rows))
result = proportion(mw, request.Proportion, cols, rows)
if result != nil {
return result
}
} else {
// fmt.Print(fmt.Sprintf("crop(im, %d, %d, %d, %d) \n", x, y, cols, rows))
result = crop(mw, x, y, cols, rows)
if result != nil {
return result
}
}
}
/* rotate image */
if request.Rotate != 0 {
// fmt.Print(fmt.Sprintf("wi_rotate(im, %d) \n", request.Rotate))
background := imagick.NewPixelWand()
if background == nil {
result = fmt.Errorf("init new pixelwand faile.")
return result
}
defer background.Destroy()
isOk := background.SetColor("#ffffff")
if !isOk {
result = fmt.Errorf("set background color faile.")
return result
}
result = mw.RotateImage(background, float64(request.Rotate))
if result != nil {
return result
}
}
/* set gray */
if request.Gary == 1 {
// fmt.Print(fmt.Sprintf("wi_gray(im) \n"))
result = mw.SetImageType(imagick.IMAGE_TYPE_GRAYSCALE)
if result != nil {
return result
}
}
/* set quality */
//fmt.Print(fmt.Sprintf("wi_set_quality(im, %d) \n", request.Quality))
result = mw.SetImageCompressionQuality(uint(request.Quality))
if result != nil {
return result
}
/* set format */
if "none" != request.Format {
// fmt.Print(fmt.Sprintf("wi_set_format(im, %s) \n", request.Format))
result = mw.SetImageFormat(request.Format)
if result != nil {
return result
}
}
//fmt.Print(fmt.Sprintf("convert(im, req) %s \n", result))
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 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 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()))
}
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 (i *Image) Process(wand *imagick.MagickWand, q *Query) {
defer wand.Clear()
// wand.SetOption("jpeg:size", fmt.Sprintf("%dx%d", q.ResizedWidth, q.ResizedHeight))
bench("wand read", func() { wand.ReadImage(i.Path) })
bench("wand set image format", func() { wand.SetImageFormat("jpeg") })
bench("wand set compress", func() { wand.SetCompression(imagick.COMPRESSION_JPEG2000) })
bench("wand set image quality", func() { wand.SetImageCompressionQuality(95) })
bench("wand resize", func() {
i.resize(wand, q.ResizedWidth, q.ResizedHeight)
})
bench("wand strip", func() {
wand.StripImage()
})
i.Blob = wand.GetImageBlob()
i.Processed = true
}