func Convert(imagePath, replaceText string, width float64) (string, error) {
var buffer string
imtext := NewImageText(replaceText)
imagick.Initialize()
defer imagick.Terminate()
originalImage := imagick.NewMagickWand()
defer originalImage.Destroy()
err := originalImage.ReadImage(imagePath)
if err != nil {
return "", fmt.Errorf("invalid parameter not image file: %s", imagePath)
}
originWidth := float64(originalImage.GetImageWidth())
originHeight := float64(originalImage.GetImageHeight())
height := math.Floor(width / originWidth * originHeight)
// resize
if err := originalImage.ScaleImage(uint(width), uint(height)); err != nil {
return "", fmt.Errorf("invalid parameter width: %s", width)
}
iterator := originalImage.NewPixelIterator()
defer iterator.Destroy()
for y := 0; y < int(height); y++ {
pixels := iterator.GetNextIteratorRow()
if len(pixels) == 0 {
break
}
for _, pixel := range pixels {
if !pixel.IsVerified() {
return "", fmt.Errorf("convert error: %s", "unverified pixel")
}
r := (uint8)(255 * pixel.GetRed())
g := (uint8)(255 * pixel.GetGreen())
b := (uint8)(255 * pixel.GetBlue())
short := RGBToShort(r, g, b)
if replaceText == "" {
buffer += fmt.Sprintf("\x1b[48;05;%sm \x1b[0m", short)
} else {
buffer += fmt.Sprintf("\x1b[38;05;%sm%s\x1b[0m", short, imtext.GetText())
}
}
buffer += "\n"
if err := iterator.SyncIterator(); err != nil {
return "", fmt.Errorf("convert error: %s", err)
}
}
return buffer, nil
}
// adding text to image copied from example
func (cl *cell) imgtext(width, height int) *imagick.MagickWand {
mw := imagick.NewMagickWand()
//defer mw.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
pw := imagick.NewPixelWand()
defer pw.Destroy()
pw.SetColor("none")
// Create a new transparent image
mw.NewImage(uint(width), uint(height), pw)
// Set up a 72 point white font
r, g, b, _ := cl.font.color.RGBA()
pw.SetColor(fmt.Sprintf("rgb(%d,%d,%d)", r, g, b))
dw.SetFillColor(pw)
if (cl.font.name != "") || (cl.font.name != "none") {
dw.SetFont(cl.font.name)
}
dw.SetFontSize(cl.font.size)
otlne := "none"
// Add a black outline to the text
r, g, b, _ = cl.font.outlineColor.RGBA()
if cl.font.outline {
otlne = fmt.Sprintf("rgb(%d,%d,%d)", r, g, b)
}
pw.SetColor(otlne)
dw.SetStrokeColor(pw)
dw.SetStrokeWidth(cl.font.outlineSize)
// Turn antialias on - not sure this makes a difference
//dw.SetTextAntialias(true)
// Now draw the text
dw.Annotation(cl.font.x, cl.font.y, cl.text)
// Draw the image on to the mw
mw.DrawImage(dw)
// equivalent to the command line +repage
mw.ResetImagePage("")
// Make a copy of the text image
cw := mw.Clone()
// Set the background colour to blue for the shadow
pw.SetColor("black")
mw.SetImageBackgroundColor(pw)
// Opacity is a real number indicating (apparently) percentage
mw.ShadowImage(70, 4, 5, 5)
// Composite the text on top of the shadow
mw.CompositeImage(cw, imagick.COMPOSITE_OP_OVER, 5, 5)
cw.Destroy()
return mw
}
/*resizeImage() mw fullsize image
newwidth, newheight = size to be resized to
keepSpecSize = return image with exactly the size specified or just the size of the resized image
center = senter the image
*/
func resizeImage(mw *imagick.MagickWand, newWidth, newHeight int, keepSpecSize, center bool) (resmw *imagick.MagickWand) {
var (
width, height, origHeight, origWidth int
)
origHeight = int(mw.GetImageHeight())
origWidth = int(mw.GetImageWidth())
//check if requested size is the same as current size
if (origHeight != newHeight) || (origWidth != newWidth) {
// width / height * newheight = newwidth
if (round((float64(origWidth) / float64(origHeight)) * float64(newHeight))) <= newWidth {
width = round((float64(origWidth) / float64(origHeight)) * float64(newHeight))
height = newHeight
} else {
// height / width * newwidth = newheight
height = round((float64(origHeight) / float64(origWidth)) * float64(newWidth))
width = newWidth
}
} else {
height = newHeight
width = newWidth
}
//new magickwand for resized image
resmw = imagick.NewMagickWand()
if !keepSpecSize {
resmw.NewImage(uint(width), uint(height), imagick.NewPixelWand())
center = false
} else {
//blank image
resmw.NewImage(uint(newWidth), uint(newHeight), imagick.NewPixelWand())
if center {
err = mw.ResizeImage(uint(width), uint(height), imagick.FILTER_LANCZOS, 1)
if err != nil {
panic(err)
}
//centers image
resmw.CompositeImage(mw, imagick.COMPOSITE_OP_SRC_OVER, round(float64(newWidth-width)/float64(2)), round(float64(newHeight-height)/float64(2)))
} else {
resmw.CompositeImage(mw, imagick.COMPOSITE_OP_SRC_OVER, 0, 0)
}
}
mw.Destroy()
return resmw
}
func (cl *cell) Init() {
cl.text = "hello this is text\nhaha\nhdsjfklfhaskjd"
cl.index = -1
cl.font.color, cl.font.outlineColor = color.RGBA{0, 0, 0, 1}, color.RGBA{1, 1, 1, 1}
cl.font.name = "none"
cl.font.outline = false
cl.font.outlineSize = 1
cl.font.size = 35
cl.font.x, cl.font.y = 10, 30
cl.qmlcell = cellQml.Create(engine.Context())
cl.qmlimg = qimg.Create(engine.Context())
//load image
cl.img = imagick.NewMagickWand()
cl.img.ReadImage("logo:")
}
func NewImage() Image {
return Image{imagick.NewMagickWand()}
}