func main() {
imagick.Initialize()
defer imagick.Terminate()
mw := imagick.NewMagickWand()
defer mw.Destroy()
lw := imagick.NewMagickWand()
defer lw.Destroy()
pw := imagick.NewPixelWand()
defer pw.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
// Create the initial 640x480 transparent canvas
pw.SetColor("none")
mw.NewImage(640, 480, pw)
pw.SetColor("white")
dw.SetFillColor(pw)
dw.RoundRectangle(15, 15, 624, 464, 15, 15)
mw.DrawImage(dw)
lw.ReadImage("logo:")
// Note that MagickSetImageCompose is usually only used for the MagickMontageImage
// function and isn't used or needed by MagickCompositeImage
mw.CompositeImage(lw, imagick.COMPOSITE_OP_SRC_IN, 0, 0)
/* Write the new image */
mw.WriteImage("mask_result.png")
}
// Text effect 7 - Polar distortion
func textEffect7() {
imagick.Initialize()
defer imagick.Terminate()
// This one uses d_args[0]
mw := imagick.NewMagickWand()
defer mw.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
pw := imagick.NewPixelWand()
defer pw.Destroy()
// Create a 320x200 transparent canvas
pw.SetColor("none")
mw.NewImage(320, 200, pw)
// Set up a 72 point font
dw.SetFont("Verdana-Bold-Italic")
dw.SetFontSize(72)
// Now draw the text
dw.Annotation(25, 65, "Magick")
// Draw the image on to the mw
mw.DrawImage(dw)
d_args[0] = 0.0
// DON'T FORGET to set the correct number of arguments here
mw.DistortImage(imagick.DISTORTION_POLAR, d_args, true)
//mw.ResetImagePage("")
// Trim the image again
mw.TrimImage(0)
// Add the border
pw.SetColor("none")
mw.BorderImage(pw, 10, 10)
// and write it
mw.WriteImage("text_polar.png")
}
// Text effect 2 - tiled text using the builtin checkerboard pattern
// Anthony's Tiled Font effect
func textEffect2() {
imagick.Initialize()
defer imagick.Terminate()
mw := imagick.NewMagickWand()
defer mw.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
pw := imagick.NewPixelWand()
defer pw.Destroy()
setTilePattern(dw, "#check", "pattern:checkerboard")
pw.SetColor("lightblue")
// Create a new transparent image
mw.NewImage(320, 100, pw)
// Set up a 72 point font
dw.SetFont("Verdana-Bold-Italic")
dw.SetFontSize(72)
// Now draw the text
dw.Annotation(28, 68, "Magick")
// Draw the image on to the mw
mw.DrawImage(dw)
// Trim the image
mw.TrimImage(0)
// Add a transparent border
pw.SetColor("lightblue")
mw.BorderImage(pw, 5, 5)
// and write it
mw.WriteImage("text_pattern.png")
}
// Text effect 4 - bevelled font http://www.imagemagick.org/Usage/fonts/#bevel
func textEffect4() {
imagick.Initialize()
defer imagick.Terminate()
mw := imagick.NewMagickWand()
defer mw.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
pw := imagick.NewPixelWand()
defer pw.Destroy()
// Create a 320x100 canvas
pw.SetColor("gray")
mw.NewImage(320, 100, pw)
// Set up a 72 point font
dw.SetFont("Verdana-Bold-Italic")
dw.SetFontSize(72)
// Set up a 72 point white font
pw.SetColor("white")
dw.SetFillColor(pw)
// Now draw the text
dw.Annotation(25, 65, "Magick")
// Draw the image on to the mw
mw.DrawImage(dw)
// the "gray" parameter must be true to get the effect shown on Anthony's page
mw.ShadeImage(true, 140, 60)
pw.SetColor("yellow")
dw.SetFillColor(pw)
cpw := imagick.NewPixelWand()
defer cpw.Destroy()
cpw.SetColor("gold")
mw.ColorizeImage(pw, cpw)
// and write it
mw.WriteImage("text_bevel.png")
}
// Text effect 3 - arc font (similar to http://www.imagemagick.org/Usage/fonts/#arc)
func textEffect3() {
imagick.Initialize()
defer imagick.Terminate()
mw := imagick.NewMagickWand()
defer mw.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
pw := imagick.NewPixelWand()
defer pw.Destroy()
// Create a 320x100 lightblue canvas
pw.SetColor("lightblue")
mw.NewImage(320, 100, pw)
// Set up a 72 point font
dw.SetFont("Verdana-Bold-Italic")
dw.SetFontSize(72)
// Now draw the text
dw.Annotation(25, 65, "Magick")
// Draw the image on to the mw
mw.DrawImage(dw)
mw.DistortImage(imagick.DISTORTION_ARC, dargs, false)
// Trim the image
mw.TrimImage(0)
// Add the border
pw.SetColor("lightblue")
mw.BorderImage(pw, 10, 10)
// and write it
mw.WriteImage("text_arc.png")
}
// Text effect 5 and 6 - Plain text and then Barrel distortion
func textEffect5And6() {
imagick.Initialize()
defer imagick.Terminate()
// This one uses d_args
mw := imagick.NewMagickWand()
defer mw.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
pw := imagick.NewPixelWand()
defer pw.Destroy()
// Create a 320x100 transparent canvas
pw.SetColor("none")
mw.NewImage(320, 100, pw)
// Set up a 72 point font
dw.SetFont("Verdana-Bold-Italic")
dw.SetFontSize(72)
// Now draw the text
dw.Annotation(25, 65, "Magick")
// Draw the image on to the mw
mw.DrawImage(dw)
mw.WriteImage("text_plain.png")
// Trim the image
mw.TrimImage(0)
// Add the border
pw.SetColor("none")
mw.BorderImage(pw, 10, 10)
//mw.SetImageMatte(true)
//mw.SetImageVirtualPixelMethod(TransparentVirtualPixelMethod)
// d_args[0] = 0.1;d_args[1] = -0.25;d_args[2] = -0.25; [3] += .1
// The first value should be positive. If it is negative the image is *really* distorted
d_args[0] = 0.0
d_args[1] = 0.0
d_args[2] = 0.5
// d_args[3] should normally be chosen such the sum of all 4 values is 1
// so that the result is the same size as the original
// You can override the sum with a different value
// If the sum is greater than 1 the resulting image will be smaller than the original
d_args[3] = 1 - (d_args[0] + d_args[1] + d_args[2])
// Make the result image smaller so that it isn't as likely
// to overflow the edges
// d_args[3] += 0.1
// 0.0,0.0,0.5,0.5,0.0,0.0,-0.5,1.9
d_args[3] = 0.5
d_args[4] = 0.0
d_args[5] = 0.0
d_args[6] = -0.5
d_args[7] = 1.9
// DON'T FORGET to set the correct number of arguments here
mw.DistortImage(imagick.DISTORTION_BARREL, d_args, true)
//mw.ResetImagePage("")
// Trim the image again
mw.TrimImage(0)
// Add the border
pw.SetColor("none")
mw.BorderImage(pw, 10, 10)
// and write it
mw.WriteImage("text_barrel.png")
}
func main() {
imagick.Initialize()
defer imagick.Terminate()
// Current coordinates of text
var dx, dy float64
// Width of a space in current font/size
var sx float64
mw := imagick.NewMagickWand()
dw := imagick.NewDrawingWand()
// Set the size of the image
mw.SetSize(300, 100)
//mw.SetImageAlphaChannel(imagick.CHANNEL_ALPHA)
mw.ReadImage("xc:white")
// DO NOT SET GRAVITY - it makes text placement more complicated
// (unless it does exactly what you wanted anyway).
// Start near the left edge
dx = 10
// If we know the largest font we're using, we can set the y coordinate
// fairly accurately. In this case it is the 72 point Times font, so to
// place the text such that the largest almost touches the top of the image
// we just add the text height to the descender to give the coordinate for
// our baseline.
// In this case the largest is the 72 point Times-New-Roman so I'll use that
// to compute the baseline
dw.SetFontSize(72)
dw.SetFont("Times-New-Roman")
fm := mw.QueryFontMetrics(dw, "M")
dy = fm.CharacterHeight + fm.Descender
// Note that we must free up the fontmetric array once we're done with it
// this
draw_setfont(mw, dw, "Arial", 48, "#40FF80", &sx)
draw_metrics(mw, dw, &dx, dy, sx, "this")
// is
// A NULL signals to draw_setfont that the font stays the same
draw_setfont(mw, dw, "", 24, "#8040BF", &sx)
draw_metrics(mw, dw, &dx, dy, sx, "is")
// my
draw_setfont(mw, dw, "Times-New-Roman", 18, "#BF00BF", &sx)
draw_metrics(mw, dw, &dx, dy, sx, "my")
// text
draw_setfont(mw, dw, "", 72, "#0F0FBF", &sx)
draw_metrics(mw, dw, &dx, dy, sx, "text")
mw.DrawImage(dw)
// Now write the magickwand image
mw.WriteImage("metric1.gif")
}
// Text effect 1 - shadow effect using MagickShadowImage
// NOTE - if an image has a transparent background, adding a border of any colour other
// than "none" will remove all the transparency and replace it with the border's colour
func textEffect1() {
imagick.Initialize()
defer imagick.Terminate()
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(350, 100, pw)
// Set up a 72 point white font
pw.SetColor("white")
dw.SetFillColor(pw)
dw.SetFont("Verdana-Bold-Italic")
dw.SetFontSize(72)
// Add a black outline to the text
pw.SetColor("black")
dw.SetStrokeColor(pw)
// Turn antialias on - not sure this makes a difference
dw.SetTextAntialias(true)
// Now draw the text
dw.Annotation(25, 65, "Magick")
// Draw the image on to the mw
mw.DrawImage(dw)
// Trim the image down to include only the text
mw.TrimImage(0)
// 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("blue")
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()
cw = imagick.NewMagickWand()
defer cw.Destroy()
// Create a new image the same size as the text image and put a solid colour
// as its background
pw.SetColor("rgb(125,215,255)")
cw.NewImage(mw.GetImageWidth(), mw.GetImageHeight(), pw)
// Now composite the shadowed text over the plain background
cw.CompositeImage(mw, imagick.COMPOSITE_OP_OVER, 0, 0)
// and write the result
cw.WriteImage("text_shadow.png")
}
func useDraw() {
imagick.Initialize()
defer imagick.Terminate()
/* Create a wand */
mw := imagick.NewMagickWand()
defer mw.Destroy()
/* Read the input image */
mw.ReadImage("logo:")
fill := imagick.NewPixelWand()
defer fill.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
// Set the fill to "red" or you can do the same thing with this:
fill.SetColor("red")
dw.SetFillColor(fill)
// Uses the current Fill as the colour of the point at 200,100
dw.Point(200, 100)
mw.DrawImage(dw)
/* write it */
mw.WriteImage("logo_pixel_drawingwand.gif")
}
// Text effect 8 - Shepard's distortion
func textEffect8() {
imagick.Initialize()
defer imagick.Terminate()
// This one uses d_args[0]
mw := imagick.NewMagickWand()
defer mw.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
pw := imagick.NewPixelWand()
defer pw.Destroy()
// Create a 320x200 transparent canvas
pw.SetColor("none")
mw.NewImage(640, 480, pw)
// Set up a 72 point font
dw.SetFont("Verdana-Bold-Italic")
dw.SetFontSize(72)
// Now draw the text
dw.Annotation(50, 240, "Magick Rocks")
// Draw the image on to the mw
mw.DrawImage(dw)
d_args[0] = 150.0
d_args[1] = 190.0
d_args[2] = 100.0
d_args[3] = 290.0
d_args[4] = 500.0
d_args[5] = 200.0
d_args[6] = 430.0
d_args[7] = 130.0
// DON'T FORGET to set the correct number of arguments here
mw.DistortImage(imagick.DISTORTION_SHEPARDS, d_args, true)
// Trim the image
mw.TrimImage(0)
// Add the border
pw.SetColor("none")
mw.BorderImage(pw, 10, 10)
// and write it
mw.WriteImage("text_shepards.png")
}
func main() {
imagick.Initialize()
defer imagick.Terminate()
/* First step is to create the gel shape:
convert -size 100x60 xc:none \
-fill red -draw 'circle 25,30 10,30' \
-draw 'circle 75,30 90,30' \
-draw 'rectangle 25,15 75,45' \
gel_shape.png
*/
/* Create a wand */
mw := imagick.NewMagickWand()
pw := imagick.NewPixelWand()
dw := imagick.NewDrawingWand()
mw.SetSize(100, 60)
mw.ReadImage("xc:none")
pw.SetColor("red")
dw.SetFillColor(pw)
dw.Circle(25, 30, 10, 30)
dw.Circle(75, 30, 90, 30)
dw.Rectangle(25, 15, 75, 45)
// Now we draw the Drawing wand on to the Magick Wand
mw.DrawImage(dw)
mw.WriteImage("gel_shape.png")
dw.Destroy()
pw.Destroy()
mw.Destroy()
/* Next step is to create the gel highlight:
convert gel_shape.png \
\( +clone -fx A +matte -blur 0x12 -shade 110x0 -normalize \
-sigmoidal-contrast 16,60% -evaluate multiply .5 \
-roll +5+10 +clone -compose Screen -composite \) \
-compose In -composite gel_highlight.png
*/
mw = imagick.NewMagickWand()
mw.ReadImage("gel_shape.png")
mwc := mw.Clone()
mwf, err := mwc.FxImage("A")
if err != nil {
panic(err)
}
mwf.SetImageAlphaChannel(imagick.ALPHA_CHANNEL_DEACTIVATE)
mwf.BlurImage(0, 12)
mwf.ShadeImage(true, 110, 0)
mwf.NormalizeImage()
// The last argument is specified as a percentage on the command line
// but is specified to the function as a percentage of the QuantumRange
mwf.SigmoidalContrastImage(true, 16, 0.6*imagick.QUANTUM_RANGE)
mwf.EvaluateImage(imagick.EVAL_OP_MULTIPLY, 0.5)
mwf.RollImage(5, 10)
mwc.Destroy()
// The +clone operation copies the original but only so that
// it can be used in the following composite operation, so we don't
// actually need to do a clone, just reference the original image.
mwf.CompositeImage(mw, imagick.COMPOSITE_OP_SCREEN, 0, 0)
mw.CompositeImage(mwf, imagick.COMPOSITE_OP_IN, 0, 0)
mw.WriteImage("gel_highlight.png")
mw.Destroy()
mwc.Destroy()
mwf.Destroy()
// Now create the gel border
/*
convert gel_highlight.png \
\( +clone -fx A +matte -blur 0x2 -shade 0x90 -normalize \
-blur 0x2 -negate -evaluate multiply .4 -negate -roll -.5-1 \
+clone -compose Multiply -composite \) \
-compose In -composite gel_border.png
*/
mw = imagick.NewMagickWand()
mw.ReadImage("gel_highlight.png")
mwc = mw.Clone()
mwf, err = mwc.FxImage("A")
if err != nil {
panic(err)
}
mwf.SetImageAlphaChannel(imagick.ALPHA_CHANNEL_DEACTIVATE)
mwf.BlurImage(0, 2)
mwf.ShadeImage(true, 0, 90)
mwf.NormalizeImage()
mwf.BlurImage(0, 2)
mwf.NegateImage(false)
mwf.EvaluateImage(imagick.EVAL_OP_MULTIPLY, 0.4)
mwf.NegateImage(false)
mwf.RollImage(-1, -1)
mwf.CompositeImage(mw, imagick.COMPOSITE_OP_MULTIPLY, 0, 0)
mw.CompositeImage(mwf, imagick.COMPOSITE_OP_IN, 0, 0)
mw.WriteImage("gel_border.png")
mw.Destroy()
mwc.Destroy()
mwf.Destroy()
// and finally the text and shadow effect
/*
convert gel_border.png \
-font Candice -pointsize 24 -fill white -stroke black \
-gravity Center -annotate 0 "Gel" -trim -repage 0x0+4+4 \
\( +clone -background navy -shadow 80x4+4+4 \) +swap \
-background none -flatten gel_button.png
*/
mw = imagick.NewMagickWand()
dw = imagick.NewDrawingWand()
pw = imagick.NewPixelWand()
mw.ReadImage("gel_border.png")
dw.SetFont("Lucida-Handwriting-Italic")
dw.SetFontSize(24)
pw.SetColor("white")
dw.SetFillColor(pw)
pw.SetColor("black")
dw.SetStrokeColor(pw)
dw.SetGravity(imagick.GRAVITY_CENTER)
// It is important to notice here that MagickAnnotateImage renders the text on
// to the MagickWand, NOT the DrawingWand. It only uses the DrawingWand for font
// and colour information etc.
mw.AnnotateImage(dw, 0, 0, 0, "Gel")
mw.TrimImage(0)
mw.ResetImagePage("0x0+4+4")
mwc = mw.Clone()
pw.SetColor("navy")
mwc.SetImageBackgroundColor(pw)
mwc.ShadowImage(80, 4, 4, 4)
mwf = imagick.NewMagickWand()
mwf.AddImage(mwc)
mwf.AddImage(mw)
mw.Destroy()
mwc.Destroy()
pw.SetColor("none")
mwf.SetImageBackgroundColor(pw)
mw = mwf.MergeImageLayers(imagick.IMAGE_LAYER_FLATTEN)
mw.WriteImage("gel_button.png")
mw.Destroy()
mwc.Destroy()
mwf.Destroy()
dw.Destroy()
pw.Destroy()
}
func main() {
imagick.Initialize()
defer imagick.Terminate()
mw := imagick.NewMagickWand()
defer mw.Destroy()
pw := imagick.NewPixelWand()
defer pw.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
if err := mw.SetSize(170, 100); err != nil {
panic(err)
}
if err := mw.ReadImage("xc:black"); err != nil {
panic(err)
}
pw.SetColor("white")
dw.SetFillColor(pw)
dw.Circle(50, 50, 13, 50)
dw.Circle(120, 50, 157, 50)
dw.Rectangle(50, 13, 120, 87)
pw.SetColor("black")
dw.SetFillColor(pw)
dw.Circle(50, 50, 25, 50)
dw.Circle(120, 50, 145, 50)
dw.Rectangle(50, 25, 120, 75)
pw.SetColor("white")
dw.SetFillColor(pw)
dw.Circle(60, 50, 40, 50)
dw.Circle(110, 50, 130, 50)
dw.Rectangle(60, 30, 110, 70)
// Now we draw the Drawing wand on to the Magick Wand
if err := mw.DrawImage(dw); err != nil {
panic(err)
}
if err := mw.GaussianBlurImage(1, 1); err != nil {
panic(err)
}
// Turn the matte of == +matte
if err := mw.SetImageMatte(false); err != nil {
panic(err)
}
if err := mw.WriteImage("logo_mask.png"); err != nil {
panic(err)
}
mw.Destroy()
dw.Destroy()
pw.Destroy()
mw = imagick.NewMagickWand()
pw = imagick.NewPixelWand()
dw = imagick.NewDrawingWand()
mwc := imagick.NewMagickWand()
defer mwc.Destroy()
mw.ReadImage("logo_mask.png")
pw.SetColor("red")
dw.SetFillColor(pw)
dw.Color(0, 0, imagick.PAINT_METHOD_RESET)
mw.DrawImage(dw)
mwc.ReadImage("logo_mask.png")
mwc.SetImageMatte(false)
mw.CompositeImage(mwc, imagick.COMPOSITE_OP_COPY_OPACITY, 0, 0)
// Annotate gets all the font information from the drawingwand
// but draws the text on the magickwand
// Get the first available "*Sans*" font
fonts := mw.QueryFonts("*Sans*")
dw.SetFont(fonts[0])
dw.SetFontSize(36)
pw.SetColor("white")
dw.SetFillColor(pw)
pw.SetColor("black")
dw.SetStrokeColor(pw)
dw.SetGravity(imagick.GRAVITY_CENTER)
mw.AnnotateImage(dw, 0, 0, 0, "Ant")
mw.WriteImage("logo_ant.png")
mwc.Destroy()
mw.Destroy()
mw = imagick.NewMagickWand()
if err := mw.ReadImage("logo_ant.png"); err != nil {
panic(err)
}
mwf, err := mw.FxImage("A")
if err != nil {
panic(err)
}
defer mwf.Destroy()
//mw.SetImageMatte(false)
// +matte is the same as -alpha off
mwf.SetImageAlphaChannel(imagick.ALPHA_CHANNEL_DEACTIVATE)
mwf.BlurImage(0, 6)
mwf.ShadeImage(true, 110, 30)
mwf.NormalizeImage()
// ant.png -compose Overlay -composite
mwc = imagick.NewMagickWand()
mwc.ReadImage("logo_ant.png")
mwf.CompositeImage(mwc, imagick.COMPOSITE_OP_OVERLAY, 0, 0)
mwc.Destroy()
// ant.png -matte -compose Dst_In -composite
mwc = imagick.NewMagickWand()
mwc.ReadImage("logo_ant.png")
// -matte is the same as -alpha on
// I don't understand why the -matte in the command line
// does NOT operate on the image just read in (logo_ant.png in mwc)
// but on the image before it in the list
// It would appear that the -matte affects each wand currently in the
// command list because applying it to both wands gives the same result
mwf.SetImageAlphaChannel(imagick.ALPHA_CHANNEL_SET)
mwf.CompositeImage(mwc, imagick.COMPOSITE_OP_DST_IN, 0, 0)
mwf.WriteImage("logo_ant_3D.png")
mw.Destroy()
mwc.Destroy()
mwf.Destroy()
/* Now for the shadow
convert ant_3D.png \( +clone -background navy -shadow 80x4+6+6 \) +swap \
-background none -layers merge +repage ant_3D_shadowed.png
*/
mw = imagick.NewMagickWand()
mw.ReadImage("logo_ant_3D.png")
mwc = mw.Clone()
pw.SetColor("navy")
mwc.SetImageBackgroundColor(pw)
mwc.ShadowImage(80, 4, 6, 6)
// at this point
// mw = ant_3D.png
// mwc = +clone -background navy -shadow 80x4+6+6
// To do the +swap I create a new blank MagickWand and then
// put mwc and mw into it. ImageMagick probably doesn't do it
// this way but it works here and that's good enough for me!
mwf = imagick.NewMagickWand()
mwf.AddImage(mwc)
mwf.AddImage(mw)
mwc.Destroy()
pw.SetColor("none")
mwf.SetImageBackgroundColor(pw)
mwc = mwf.MergeImageLayers(imagick.IMAGE_LAYER_MERGE)
mwc.WriteImage("logo_shadow_3D.png")
mw.Destroy()
mwc.Destroy()
mwf.Destroy()
/*
and now for the fancy background
convert ant_3D_shadowed.png \
\( +clone +repage +matte -fx 'rand()' -shade 120x30 \
-fill grey70 -colorize 60 \
-fill lavender -tint 100 \) -insert 0 \
-flatten ant_3D_bg.jpg
*/
mw = imagick.NewMagickWand()
mw.ReadImage("logo_shadow_3D.png")
mwc = mw.Clone()
// +repage
mwc.ResetImagePage("")
// +matte is the same as -alpha off
mwc.SetImageAlphaChannel(imagick.ALPHA_CHANNEL_DEACTIVATE)
mwf, err = mwc.FxImage("rand()")
if err != nil {
panic(err)
}
mwf.ShadeImage(true, 120, 30)
pw.SetColor("grey70")
// It seems that this must be a separate pixelwand for Colorize to work!
pwo := imagick.NewPixelWand()
defer pwo.Destroy()
// AHA .. this is how to do a 60% colorize
pwo.SetColor("rgb(60%,60%,60%)")
mwf.ColorizeImage(pw, pwo)
pw.SetColor("lavender")
// and this is a 100% tint
pwo.SetColor("rgb(100%,100%,100%)")
mwf.TintImage(pw, pwo)
mwc.Destroy()
mwc = imagick.NewMagickWand()
mwc.AddImage(mwf)
mwc.AddImage(mw)
mwf = mwc.MergeImageLayers(imagick.IMAGE_LAYER_FLATTEN)
if err := mwf.DisplayImage(os.Getenv("DYSPLAY")); err != nil {
panic(err)
}
}
func main() {
imagick.Initialize()
defer imagick.Terminate()
image := imagick.NewMagickWand()
defer image.Destroy()
pw := imagick.NewPixelWand()
defer pw.Destroy()
image.ReadImage("fract6.jpg")
// scale it down
w := image.GetImageWidth()
h := image.GetImageHeight()
pw.SetColor("transparent")
if err := image.ShearImage(pw, 45, 0); err != nil {
panic(err)
}
w = image.GetImageWidth()
h = image.GetImageHeight()
// scale it to make it look like it is laying down
if err := image.ScaleImage(w, h/2); err != nil {
panic(err)
}
// Get image stats
w = image.GetImageWidth()
h = image.GetImageHeight()
// Make a blank canvas to draw on
canvas := imagick.NewMagickWand()
defer canvas.Destroy()
// Use a colour from the input image
pw, err := image.GetImagePixelColor(0, 0)
if err != nil {
panic(err)
}
canvas.NewImage(w, h*2, pw)
offset := int(h)
// The original drawing method was to go along each row from top to bottom so that
// a line in the "front" (which is one lower down the picture) will be drawn over
// one behind it.
// The problem with this method is that every line is drawn even if it will be covered
// up by a line "in front" of it later on.
// The method used here goes up each column from left to right and only draws a line if
// it is longer than everything drawn so far in this column and will therefore be visible.
// With the new drawing method this takes 13 secs - the previous method took 59 secs
// loop through all points in image
for x := 0; x < int(w); x++ {
// The PHP version created, used and destroyed the drawingwand inside
// the inner loop but it is about 25% faster to do only the DrawLine
// inside the loop
line := imagick.NewDrawingWand()
line_height := 0
for y := int(h) - 1; y >= 0; y-- {
// get (r,g,b) and grey value
pw, err := image.GetImagePixelColor(int(x), int(y))
if err != nil {
continue
}
// 255* adjusts the rgb values to Q8 even if the IM being used is Q16
r := (int)(255 * pw.GetRed())
g := (int)(255 * pw.GetGreen())
b := (int)(255 * pw.GetBlue())
// Calculate grayscale - a divisor of 10-25 seems to work well.
// grey = (r+g+b)/25
grey := (r + g + b) / 15
// grey = (r+g+b)/10
// Only draw a line if it will show "above" what's already been done
if line_height == 0 || line_height < grey {
line.SetFillColor(pw)
line.SetStrokeColor(pw)
// Draw the part of the line that is visible
start_y := y + offset - line_height
end_y := y - grey + offset
line.Line(float64(x), float64(start_y), float64(x), float64(end_y))
line_height = grey
}
line_height--
}
// Draw the lines on the image
canvas.DrawImage(line)
line.Destroy()
}
canvas.ScaleImage(w-h, h*2)
// write canvas
canvas.WriteImage("3d_fractal.jpg")
}
func main() {
imagick.Initialize()
defer imagick.Terminate()
mw := imagick.NewMagickWand()
defer mw.Destroy()
dw := imagick.NewDrawingWand()
defer dw.Destroy()
cw := imagick.NewPixelWand()
diameter := uint(640)
radius := float64(diameter / 2)
cw.SetColor("white")
mw.NewImage(diameter, diameter, cw)
dw.SetStrokeOpacity(1)
// circle and rectangle
dw.PushDrawingWand()
// Hmmmm. Very weird. rgb(0,0,1) draws a black line around the edge
// of the circle as it should. But rgb(0,0,0) or black don't.
// AND if I remove the PixelSetColor then it draws a white boundary
// around the rectangle (and presumably around the circle too)
cw.SetColor("rgb(0,0,1)")
dw.SetStrokeColor(cw)
dw.SetStrokeWidth(4)
dw.SetStrokeAntialias(true)
cw.SetColor("red")
//dw.SetStrokeOpacity(1)
dw.SetFillColor(cw)
dw.Circle(radius, radius, radius, radius*2)
dw.Rectangle(50, 13, 120, 87)
dw.PopDrawingWand()
// rounded rectangle
dw.PushDrawingWand()
points := []imagick.PointInfo{
{378.1, 81.72}, {381.1, 79.56}, {384.3, 78.12}, {387.6, 77.33},
{391.1, 77.11}, {394.6, 77.62}, {397.8, 78.77}, {400.9, 80.57},
{403.6, 83.02}, {523.9, 216.8}, {526.2, 219.7}, {527.6, 223},
{528.4, 226.4}, {528.6, 229.8}, {528, 233.3}, {526.9, 236.5},
{525.1, 239.5}, {522.6, 242.2}, {495.9, 266.3}, {493, 268.5},
{489.7, 269.9}, {486.4, 270.8}, {482.9, 270.9}, {479.5, 270.4},
{476.2, 269.3}, {473.2, 267.5}, {470.4, 265}, {350, 131.2},
{347.8, 128.3}, {346.4, 125.1}, {345.6, 121.7}, {345.4, 118.2},
{346, 114.8}, {347.1, 111.5}, {348.9, 108.5}, {351.4, 105.8},
{378.1, 81.72},
}
dw.SetStrokeAntialias(true)
dw.SetStrokeWidth(2.016)
dw.SetStrokeLineCap(imagick.LINE_CAP_ROUND)
dw.SetStrokeLineJoin(imagick.LINE_JOIN_ROUND)
dw.SetStrokeDashArray(make([]float64, 0))
cw.SetColor("rgb(0,0,128)")
// If strokecolor is removed completely then the circle is not there
dw.SetStrokeColor(cw)
// But now I've added strokeopacity - 1=circle there 0=circle not there
// If opacity is 1 the black edge around the rectangle is visible
dw.SetStrokeOpacity(1)
// No effect
// dw.SetFillRule(imagick.FILL_EVEN_ODD)
// this doesn't affect the circle
cw.SetColor("#c2c280")
dw.SetFillColor(cw)
// 1=circle there 0=circle there but rectangle fill disappears
// dw.SetFillOpacity(0)
dw.Polygon(points)
dw.SetStrokeOpacity(1)
dw.PopDrawingWand()
// yellow polygon
dw.PushDrawingWand()
points = []imagick.PointInfo{
{540, 288}, {561.6, 216}, {547.2, 43.2}, {280.8, 36},
{302.4, 194.4}, {331.2, 64.8}, {504, 64.8}, {475.2, 115.2},
{525.6, 93.6}, {496.8, 158.4}, {532.8, 136.8}, {518.4, 180},
{540, 172.8}, {540, 223.2}, {540, 288},
}
dw.SetStrokeAntialias(true)
dw.SetStrokeWidth(5.976)
dw.SetStrokeLineCap(imagick.LINE_CAP_ROUND)
dw.SetStrokeLineJoin(imagick.LINE_JOIN_ROUND)
dw.SetStrokeDashArray([]float64{})
cw.SetColor("#4000c2")
dw.SetStrokeColor(cw)
dw.SetFillRule(imagick.FILL_EVEN_ODD)
cw.SetColor("#ffff00")
dw.SetFillColor(cw)
dw.Polygon(points)
dw.PopDrawingWand()
// rotated and translated ellipse
// The DrawEllipse function only draws the ellipse with
// the major and minor axes orthogonally aligned. This also
// applies to some of the other functions such as DrawRectangle.
// If you want an ellipse that has the major axis rotated, you
// have to rotate the coordinate system before the ellipse is
// drawn. And you'll also want the ellipse somewhere on the
// image rather than at the top left (where the 0,0 origin is
// located) so before drawing the ellipse we move the origin to
// wherever we want the centre of the ellipse to be and then
// rotate the coordinate system by the angle of rotation we wish
// to apply to the ellipse and *then* we draw the ellipse.
// NOTE that doing all this within PushDrawingWand()/PopDrawingWand()
// means that the coordinate system will be restored after
// the PopDrawingWand
dw.PushDrawingWand()
cw.SetColor("rgb(0,0,1)")
dw.SetStrokeColor(cw)
dw.SetStrokeWidth(2)
dw.SetStrokeAntialias(true)
cw.SetColor("orange")
//dw.DrawSetStrokeOpacity(1)
dw.SetFillColor(cw)
// Be careful of the order in which you meddle with the
// coordinate system! Rotating and then translating is
// not the same as translating then rotating
dw.Translate(radius/2, 3*radius/2)
dw.Rotate(-30)
dw.Ellipse(0, 0, radius/8, 3*radius/8, 0, 360)
dw.PopDrawingWand()
// A line from the centre of the circle
// to the top left edge of the image
dw.Line(0, 0, radius, radius)
mw.DrawImage(dw)
mw.WriteImage("chart_test.jpg")
}