func to_img(brot *[size][size]uint, max uint) {
gray := image.NewGray16(image.Rect(0, 0, size, size))
norm_gray := image.NewGray16(image.Rect(0, 0, size, size))
for x := 0; x < size; x++ {
for y := 0; y < size; y++ {
pix := brot[x][y]
norm := float64(brot[x][y]*4) / float64(max) * 65534
if norm > 65534 {
norm = 65534
}
if pix > 65534 {
pix = 65534
}
gray.SetGray16(
x, y,
color.Gray16{uint16(pix)})
norm_gray.SetGray16(
x, y,
color.Gray16{uint16(norm)})
}
}
w, _ := os.OpenFile("./brot.png", os.O_CREATE|os.O_WRONLY, 0666)
png.Encode(w, gray)
n, _ := os.OpenFile("./brot-norm.png", os.O_CREATE|os.O_WRONLY, 0666)
png.Encode(n, norm_gray)
}
func (ff *FontFace) GetImage(text string) (img draw.Image, err error) {
var (
src image.Image
bg image.Image
dst draw.Image
pt fixed.Point26_6
w int
h int
)
src = image.NewUniform(ff.fg)
bg = image.NewUniform(ff.bg)
w = int(float32(len(text)) * ff.charw)
h = int(ff.charh)
dst = image.NewRGBA(image.Rect(0, 0, w, h))
draw.Draw(dst, dst.Bounds(), bg, image.ZP, draw.Src)
ff.context.SetSrc(src)
ff.context.SetDst(dst)
ff.context.SetClip(dst.Bounds())
pt = freetype.Pt(0, int(ff.charh+ff.offy))
if pt, err = ff.context.DrawString(text, pt); err != nil {
return
}
img = image.NewRGBA(image.Rect(0, 0, int(pt.X/64), int(pt.Y/64)))
draw.Draw(img, img.Bounds(), dst, image.Pt(0, -int(ff.offy)), draw.Src)
return
}
func TestEncodeAllFramesOutOfBounds(t *testing.T) {
images := []*image.Paletted{
image.NewPaletted(image.Rect(0, 0, 5, 5), palette.Plan9),
image.NewPaletted(image.Rect(2, 2, 8, 8), palette.Plan9),
image.NewPaletted(image.Rect(3, 3, 4, 4), palette.Plan9),
}
for _, upperBound := range []int{6, 10} {
g := &GIF{
Image: images,
Delay: make([]int, len(images)),
Disposal: make([]byte, len(images)),
Config: image.Config{
Width: upperBound,
Height: upperBound,
},
}
err := EncodeAll(ioutil.Discard, g)
if upperBound >= 8 {
if err != nil {
t.Errorf("upperBound=%d: %v", upperBound, err)
}
} else {
if err == nil {
t.Errorf("upperBound=%d: got nil error, want non-nil", upperBound)
}
}
}
}
func TestDrawOverlap(t *testing.T) {
for _, op := range []Op{Over, Src} {
for yoff := -2; yoff <= 2; yoff++ {
loop:
for xoff := -2; xoff <= 2; xoff++ {
m := gradYellow(127).(*image.RGBA)
dst := m.SubImage(image.Rect(5, 5, 10, 10)).(*image.RGBA)
src := m.SubImage(image.Rect(5+xoff, 5+yoff, 10+xoff, 10+yoff)).(*image.RGBA)
b := dst.Bounds()
// Draw the (src, mask, op) onto a copy of dst using a slow but obviously correct implementation.
golden := makeGolden(dst, b, src, src.Bounds().Min, nil, image.ZP, op)
if !b.Eq(golden.Bounds()) {
t.Errorf("drawOverlap xoff=%d,yoff=%d: bounds %v versus %v", xoff, yoff, dst.Bounds(), golden.Bounds())
continue
}
// Draw the same combination onto the actual dst using the optimized DrawMask implementation.
DrawMask(dst, b, src, src.Bounds().Min, nil, image.ZP, op)
// Check that the resultant dst image matches the golden output.
for y := b.Min.Y; y < b.Max.Y; y++ {
for x := b.Min.X; x < b.Max.X; x++ {
if !eq(dst.At(x, y), golden.At(x, y)) {
t.Errorf("drawOverlap xoff=%d,yoff=%d: at (%d, %d), %v versus golden %v", xoff, yoff, x, y, dst.At(x, y), golden.At(x, y))
continue loop
}
}
}
}
}
}
}
func rotate(im image.Image, angle int) image.Image {
var rotated *image.NRGBA
// trigonometric (i.e counter clock-wise)
switch angle {
case 90:
newH, newW := im.Bounds().Dx(), im.Bounds().Dy()
rotated = image.NewNRGBA(image.Rect(0, 0, newW, newH))
for y := 0; y < newH; y++ {
for x := 0; x < newW; x++ {
rotated.Set(x, y, im.At(newH-1-y, x))
}
}
case -90:
newH, newW := im.Bounds().Dx(), im.Bounds().Dy()
rotated = image.NewNRGBA(image.Rect(0, 0, newW, newH))
for y := 0; y < newH; y++ {
for x := 0; x < newW; x++ {
rotated.Set(x, y, im.At(y, newW-1-x))
}
}
case 180, -180:
newW, newH := im.Bounds().Dx(), im.Bounds().Dy()
rotated = image.NewNRGBA(image.Rect(0, 0, newW, newH))
for y := 0; y < newH; y++ {
for x := 0; x < newW; x++ {
rotated.Set(x, y, im.At(newW-1-x, newH-1-y))
}
}
default:
return im
}
return rotated
}
func TestLoadConfig(t *testing.T) {
var sampleFile = "../_template/furnace.toml"
var answer = Config{
Type: "furnace",
Image: "furnace.png",
Crop: image.Rect(7, 6, 168, 79),
Slot: []image.Point{
{56, 53},
{56, 17},
{116, 35},
},
Progress: []Progress{
{
Crop: image.Rect(176, 0, 189, 13),
Paste: image.Pt(57, 36),
},
{
Crop: image.Rect(176, 14, 24, 17),
Paste: image.Pt(199, 30),
},
},
}
sample := sampleFile
ans := answer
if !reflect.DeepEqual(LoadConfig(sample), ans) {
t.Error("toml convert error: not equal input and output \n", LoadConfig(sample), ans)
}
}
func TestSrcMask(t *testing.T) {
srcMask := image.NewRGBA(image.Rect(0, 0, 23, 1))
srcMask.SetRGBA(19, 0, color.RGBA{0x00, 0x00, 0x00, 0x7f})
srcMask.SetRGBA(20, 0, color.RGBA{0x00, 0x00, 0x00, 0xff})
srcMask.SetRGBA(21, 0, color.RGBA{0x00, 0x00, 0x00, 0x3f})
srcMask.SetRGBA(22, 0, color.RGBA{0x00, 0x00, 0x00, 0x00})
red := image.NewUniform(color.RGBA{0xff, 0x00, 0x00, 0xff})
blue := image.NewUniform(color.RGBA{0x00, 0x00, 0xff, 0xff})
dst := image.NewRGBA(image.Rect(0, 0, 6, 1))
Copy(dst, image.Point{}, blue, dst.Bounds(), Src, nil)
NearestNeighbor.Scale(dst, dst.Bounds(), red, image.Rect(0, 0, 3, 1), Over, &Options{
SrcMask: srcMask,
SrcMaskP: image.Point{20, 0},
})
got := [6]color.RGBA{
dst.RGBAAt(0, 0),
dst.RGBAAt(1, 0),
dst.RGBAAt(2, 0),
dst.RGBAAt(3, 0),
dst.RGBAAt(4, 0),
dst.RGBAAt(5, 0),
}
want := [6]color.RGBA{
{0xff, 0x00, 0x00, 0xff},
{0xff, 0x00, 0x00, 0xff},
{0x3f, 0x00, 0xc0, 0xff},
{0x3f, 0x00, 0xc0, 0xff},
{0x00, 0x00, 0xff, 0xff},
{0x00, 0x00, 0xff, 0xff},
}
if got != want {
t.Errorf("\ngot %v\nwant %v", got, want)
}
}
func parseImgBoundary(img image.Image) {
minX, maxX := img.Bounds().Min.X, img.Bounds().Max.X
minY, maxY := img.Bounds().Min.Y, img.Bounds().Max.Y
for i := minX; i < maxX; i++ {
for j := minY; j < maxY; j++ {
_, _, _, a := img.At(i, j).RGBA()
if a != 0 {
if boundary.Empty() && boundary.Min.X == -1 {
boundary = image.Rect(i, j, i, j)
} else {
_p := image.Point{i, j}
if !_p.In(boundary) {
boundary = boundary.Union(image.Rect(i, j, i, j))
}
}
}
}
}
// Should Make the midline of boundary and the img
l := boundary.Min.X
r := imageW - boundary.Max.X
if l > r {
boundary.Min.X = r
} else if l < r {
boundary.Max.X = imageW - l
}
}
//------------------------------------------------------------------------------
// Image Functions
func mergeImage(imgs []image.Image) image.Image {
width := 0
height := 0
imgs[0] = RotateImageLeft(imgs[0])
for _, v := range imgs {
if v.Bounds().Size().X > width {
width = v.Bounds().Size().X
}
height += v.Bounds().Size().Y
}
m := image.NewRGBA(image.Rect(0, 0, width, height))
height = 0
for _, v := range imgs {
h := v.Bounds().Size().Y
draw.Draw(m,
image.Rect(0, height, v.Bounds().Size().X, h+height),
v,
v.Bounds().Min,
draw.Src)
height += h
}
return m
}
func Crop(img image.Image, width int, height int, padding int) (fimg draw.Image, err error) {
// For now assume top left is bg color
// future maybe avg outer rows of pixels
bgcolor := img.At(img.Bounds().Min.X, img.Bounds().Min.Y)
logoh, logow := height-2*padding, width-2*padding
logorat := float32(logow) / float32(logoh)
interior := findLogo(img, bgcolor)
interior.Max = interior.Max.Add(image.Pt(1, 1))
center := func(rect image.Rectangle) image.Point {
return image.Point{(rect.Max.X - rect.Min.X) / 2, (rect.Max.Y - rect.Min.Y) / 2}
}
fimg = image.NewRGBA(image.Rect(0, 0, width, height))
rc := center(fimg.Bounds())
origrat := float32(interior.Dx()) / float32(interior.Dy())
if logorat > origrat {
logow = int(origrat * float32(logoh))
} else {
logoh = int(float32(logow) / origrat)
}
logoimg := Resize(img, interior, logow, logoh)
logorect := image.Rect(0, 0, logoimg.Bounds().Dx(), logoimg.Bounds().Dy())
logorect = logorect.Add(rc.Sub(image.Pt(logorect.Dx()/2, logorect.Dy()/2)))
draw.Draw(fimg, fimg.Bounds(), &image.Uniform{bgcolor}, image.ZP, draw.Src)
draw.Draw(fimg, logorect, logoimg, image.ZP, draw.Src)
return
}
func writeToJP() {
imgRect := image.Rect(0, 0, gridSize*10, gridSize*10)
img := image.NewGray(imgRect)
draw.Draw(img, img.Bounds(), &image.Uniform{color.White}, image.ZP, draw.Src)
for x := 0; x < gridSize; x++ {
for y := 0; y < gridSize; y++ {
fill := &image.Uniform{color.White}
if Env[x][y] == -1 {
fill = &image.Uniform{color.Black}
} else if Env[x][y] > 1 {
c := color.Gray{uint8(Env[x][y] * 20)}
fill = &image.Uniform{c}
}
draw.Draw(img, image.Rect((x-1)*10, (y-1)*10, x*10, y*10), fill, image.ZP, draw.Src)
}
}
buf := bytes.Buffer{}
// ok, write out the data into the new JPEG file
err := gif.Encode(&buf, img, nil)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
tmpimg, err := gif.Decode(&buf)
if err != nil {
log.Printf("Skipping frame due to weird error reading the temporary gif :%s", err)
}
frames = append(frames, tmpimg.(*image.Paletted))
}
func TestGMProcess(t *testing.T) {
buffer := new(bytes.Buffer)
png.Encode(buffer, image.NewRGBA(image.Rect(0, 0, 200, 200)))
gm := NewGMProcessor()
params, _ := ParseParams("r_100x100,c_50x50,g_c,q_50")
img, err := gm.Process(params, "text.png", buffer)
assert.NoError(t, err)
assert.NotNil(t, img)
assert.True(t, img.Len() > 0)
buffer = new(bytes.Buffer)
png.Encode(buffer, image.NewRGBA(image.Rect(0, 0, 200, 200)))
params, _ = ParseParams("r_100x0,c_50x50,g_c,q_50")
img, err = gm.Process(params, "text.png", buffer)
assert.NoError(t, err)
assert.NotNil(t, img)
assert.True(t, img.Len() > 0)
buffer = new(bytes.Buffer)
png.Encode(buffer, image.NewRGBA(image.Rect(0, 0, 200, 200)))
params, _ = ParseParams("r_0x100,c_50x50,g_c,q_50")
img, err = gm.Process(params, "text.png", buffer)
assert.NoError(t, err)
assert.NotNil(t, img)
assert.True(t, img.Len() > 0)
}
func TestRotate270(t *testing.T) {
td := []struct {
desc string
src image.Image
want *image.NRGBA
}{
{
"Rotate270 2x3",
&image.NRGBA{
Rect: image.Rect(-1, -1, 1, 2),
Stride: 2 * 4,
Pix: []uint8{
0x00, 0x11, 0x22, 0x33, 0xcc, 0xdd, 0xee, 0xff,
0xff, 0x00, 0x00, 0x00, 0x00, 0xff, 0x00, 0x00,
0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0xff,
},
},
&image.NRGBA{
Rect: image.Rect(0, 0, 3, 2),
Stride: 3 * 4,
Pix: []uint8{
0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x11, 0x22, 0x33,
0x00, 0x00, 0x00, 0xff, 0x00, 0xff, 0x00, 0x00, 0xcc, 0xdd, 0xee, 0xff,
},
},
},
}
for _, d := range td {
got := Rotate270(d.src)
want := d.want
if !compareNRGBA(got, want, 0) {
t.Errorf("test [%s] failed: %#v", d.desc, got)
}
}
}
// Join the matrix of images into a single image.
func (h Himawari) joinGrid(grid [][]image.Image) image.Image {
dst := image.NewNRGBA(image.Rect(0, 0, gridSize*h.Depth, gridSize*h.Depth))
var wg sync.WaitGroup
for i := range grid {
for j := range grid[i] {
if grid[i][j] == nil {
break
}
wg.Add(1)
go func(i, j int) {
defer wg.Done()
// Modification is performed pixel-by-pixel, so async
// should be fine, theoretically.
src := grid[i][j]
sdx, sdy := src.Bounds().Dx(), src.Bounds().Dy()
rect := image.Rect(
i*sdx, j*sdy, i*sdx+sdx, j*sdy+sdy,
)
draw.Draw(dst, rect, src, image.ZP, draw.Src)
}(i, j)
}
}
wg.Wait()
return dst
}
// DrawText is a convenience function that will create a new image, render
// the provided text to it, paint the image to the provided window, and resize
// the window to fit the text snugly.
//
// An error can occur when rendering the text to an image.
func DrawText(win *xwindow.Window, font *truetype.Font, size float64,
fontClr, bgClr color.RGBA, text string) error {
// Over estimate the extents.
ew, eh := xgraphics.TextMaxExtents(font, size, text)
eh += misc.TextBreathe // <-- this is the bug
// Create an image using the over estimated extents.
img := xgraphics.New(win.X, image.Rect(0, 0, ew, eh))
xgraphics.BlendBgColor(img, bgClr)
// Now draw the text, grab the (x, y) position advanced by the text, and
// check for an error in rendering.
x, y, err := img.Text(0, 0, fontClr, size, font, text)
if err != nil {
return err
}
// Resize the window to the geometry determined by (x, y).
w, h := x, y+misc.TextBreathe // <-- also part of the bug
win.Resize(w, h)
// Now draw the image to the window and destroy it.
img.XSurfaceSet(win.Id)
subimg := img.SubImage(image.Rect(0, 0, w, h))
subimg.XDraw()
subimg.XPaint(win.Id)
img.Destroy()
return nil
}
// makeImg allocates and initializes the destination image.
func (d *decoder) makeImg(h0, v0, mxx, myy int) {
if d.nComp == nGrayComponent {
d.img1 = image.NewGray(8*mxx, 8*myy)
d.img1.Rect = image.Rect(0, 0, d.width, d.height)
return
}
var subsampleRatio ycbcr.SubsampleRatio
n := h0 * v0
switch n {
case 1:
subsampleRatio = ycbcr.SubsampleRatio444
case 2:
subsampleRatio = ycbcr.SubsampleRatio422
case 4:
subsampleRatio = ycbcr.SubsampleRatio420
default:
panic("unreachable")
}
b := make([]byte, mxx*myy*(1*8*8*n+2*8*8))
d.img3 = &ycbcr.YCbCr{
Y: b[mxx*myy*(0*8*8*n+0*8*8) : mxx*myy*(1*8*8*n+0*8*8)],
Cb: b[mxx*myy*(1*8*8*n+0*8*8) : mxx*myy*(1*8*8*n+1*8*8)],
Cr: b[mxx*myy*(1*8*8*n+1*8*8) : mxx*myy*(1*8*8*n+2*8*8)],
SubsampleRatio: subsampleRatio,
YStride: mxx * 8 * h0,
CStride: mxx * 8,
Rect: image.Rect(0, 0, d.width, d.height),
}
}
func TestRotate270(t *testing.T) {
img0 := image.NewGray(image.Rect(-1, -1, 3, 1))
img0.Pix = []uint8{
1, 2, 3, 4,
5, 6, 7, 8,
}
img1Exp := image.NewGray(image.Rect(0, 0, 2, 4))
img1Exp.Pix = []uint8{
5, 1,
6, 2,
7, 3,
8, 4,
}
f := Rotate270()
img1 := image.NewGray(f.Bounds(img0.Bounds()))
f.Draw(img1, img0, nil)
if img1.Bounds().Size() != img1Exp.Bounds().Size() {
t.Errorf("expected %v got %v", img1Exp.Bounds().Size(), img1.Bounds().Size())
}
if !comparePix(img1Exp.Pix, img1.Pix) {
t.Errorf("expected %v got %v", img1Exp.Pix, img1.Pix)
}
}
func (p *Page) concatImages() error {
width := 0
height := 0
for _, i := range p.divImages {
img, err := utility.DecodeImage(i)
if err != nil {
return err
}
height += img.Bounds().Size().Y
if width < img.Bounds().Size().X {
width = img.Bounds().Size().X
}
}
dstRect := image.Rect(0, 0, width, height)
dstImage := image.NewRGBA(dstRect)
top := 0
for _, i := range p.divImages {
img, err := utility.DecodeImage(i)
if err != nil {
return err
}
srcPoint := image.Point{0, 0}
dstRect := image.Rect(0, top, img.Bounds().Size().X, top+img.Bounds().Size().Y)
draw.Draw(dstImage, dstRect, img, srcPoint, draw.Src)
top += img.Bounds().Size().Y
}
return utility.SaveImage(dstImage, p.imagePath())
}
// TestNegativeWeights tests that scaling by a kernel that produces negative
// weights, such as the Catmull-Rom kernel, doesn't produce an invalid color
// according to Go's alpha-premultiplied model.
func TestNegativeWeights(t *testing.T) {
check := func(m *image.RGBA) error {
b := m.Bounds()
for y := b.Min.Y; y < b.Max.Y; y++ {
for x := b.Min.X; x < b.Max.X; x++ {
if c := m.RGBAAt(x, y); c.R > c.A || c.G > c.A || c.B > c.A {
return fmt.Errorf("invalid color.RGBA at (%d, %d): %v", x, y, c)
}
}
}
return nil
}
src := image.NewRGBA(image.Rect(0, 0, 16, 16))
for y := 0; y < 16; y++ {
for x := 0; x < 16; x++ {
a := y * 0x11
src.Set(x, y, color.RGBA{
R: uint8(x * 0x11 * a / 0xff),
A: uint8(a),
})
}
}
if err := check(src); err != nil {
t.Fatalf("src image: %v", err)
}
dst := image.NewRGBA(image.Rect(0, 0, 32, 32))
CatmullRom.Scale(dst, dst.Bounds(), src, src.Bounds(), Over, nil)
if err := check(dst); err != nil {
t.Fatalf("dst image: %v", err)
}
}
func txNavRun(c *cmdapp.Command, args []string) {
cmd = c
var db jdh.DB
if len(extDBFlag) != 0 {
openExt(c, extDBFlag, "")
db = extDB
} else {
openLocal(c)
db = localDB
}
title := fmt.Sprintf("%s: please wait", c.Name)
m := widget.NewMainWindow("main", title)
geo := m.Property(sparta.Geometry).(image.Rectangle)
widget.NewButton(m, "upTax", "up", image.Rect(5, 5, 5+(sparta.WidthUnit*10), 5+(3*sparta.HeightUnit/2)))
tx := widget.NewCanvas(m, "info", image.Rect(210, 10+(3*sparta.HeightUnit/2), geo.Dx()-10, geo.Dy()-10))
tx.SetProperty(sparta.Border, true)
tx.Capture(sparta.Expose, txNavInfoExpose)
wnd["info"] = tx
l := widget.NewList(m, "taxonList", image.Rect(5, 10+(3*sparta.HeightUnit/2), 200, geo.Dy()-10))
wnd["taxonList"] = l
m.Capture(sparta.Configure, txNavConf)
m.Capture(sparta.Command, txNavComm)
sparta.Block(nil)
go txNavInitList(m, l, db, nil, 0)
sparta.Run()
}
func (jw *JsonWed) ImportOverlays(wed *Wed) error {
jw.Overlays = make([]jsonWedOverlay, 0)
jw.TileIndices = make([]int, len(wed.TileIndices))
for idx, overlay := range wed.Overlays {
if overlay.Name.String() != "" {
ov := jsonWedOverlay{}
ov.Width = int(overlay.Width)
ov.Height = int(overlay.Height)
ov.Name = overlay.Name.String()
ov.Flags = int(overlay.LayerFlags)
ov.Tilemap = make([]jsonWedTilemap, len(wed.Tilemaps[idx]))
for tmIdx, tilemap := range wed.Tilemaps[idx] {
ov.Tilemap[tmIdx].Id = int(tilemap.TileIndexLookupIndex)
ov.Tilemap[tmIdx].Count = int(tilemap.TileIndexLookupCount)
ov.Tilemap[tmIdx].Alt = int(tilemap.AlternateTileIndex)
ov.Tilemap[tmIdx].Flags = int(tilemap.Flags)
ov.Tilemap[tmIdx].AnimSpeed = int(tilemap.AnimSpeed)
ov.Tilemap[tmIdx].WFlags = int(tilemap.WFlags)
}
tisFile, err := os.Open(overlay.Name.String() + ".tis")
if err != nil {
return fmt.Errorf("unable to open overlay: %s %v", overlay.Name.String(), err)
}
defer tisFile.Close()
cwd, err := os.Getwd()
if err != nil {
return fmt.Errorf("unable to get working directory: %v", err)
}
tis, err := OpenTis(tisFile, overlay.Name.String(), cwd)
if err != nil {
return fmt.Errorf("unable to open tis: %v", err)
}
ov.Tis = tis
img := image.NewRGBA(image.Rect(0, 0, 64*ov.Width, 64*ov.Height))
closedimg := image.NewRGBA(image.Rect(0, 0, 64*ov.Width, 64*ov.Height))
for y := 0; y < int(ov.Height); y++ {
for x := 0; x < int(ov.Width); x++ {
tileNum := y*int(ov.Width) + x
tileImg := tis.SubImage(tileNum)
draw.Draw(img, image.Rect(x*64, y*64, x*64+64, y*64+64), tileImg, image.Pt(0, 0), draw.Src)
if ov.Tilemap[tileNum].Alt != -1 {
tileImg = tis.SubImage(ov.Tilemap[tileNum].Alt)
draw.Draw(closedimg, image.Rect(x*64, y*64, x*64+64, y*64+64), tileImg, image.Pt(0, 0), draw.Src)
}
}
}
ov.BackgroundImg = img
ov.ClosedImage = closedimg
jw.Overlays = append(jw.Overlays, ov)
}
}
for idx, ti := range wed.TileIndices {
jw.TileIndices[idx] = int(ti)
}
return nil
}
// Thumbnail scales and crops src so it fits in dst.
func Thumbnail(dst draw.Image, src image.Image) error {
// Scale down src in the dimension that is closer to dst.
sb := src.Bounds()
db := dst.Bounds()
rx := float64(sb.Dx()) / float64(db.Dx())
ry := float64(sb.Dy()) / float64(db.Dy())
var b image.Rectangle
if rx < ry {
b = image.Rect(0, 0, db.Dx(), int(float64(sb.Dy())/rx))
} else {
b = image.Rect(0, 0, int(float64(sb.Dx())/ry), db.Dy())
}
buf := image.NewRGBA(b)
if err := Scale(buf, src); err != nil {
return err
}
// Crop.
// TODO(crawshaw): improve on center-alignment.
var pt image.Point
if rx < ry {
pt.Y = (b.Dy() - db.Dy()) / 2
} else {
pt.X = (b.Dx() - db.Dx()) / 2
}
draw.Draw(dst, db, buf, pt, draw.Src)
return nil
}
func main() {
rand.Seed(time.Now().UTC().UnixNano())
var templatePath string
if len(os.Args) == 1 {
templatePath = "tux.png"
} else {
templatePath = os.Args[1]
}
template, err := readTemplate(templatePath)
if err != nil {
panic(err)
}
templateBounds := template.Bounds()
sourceHeight := templateBounds.Max.Y
sourceWidth := templateBounds.Max.X
cypherHeight := sourceHeight * 2
cypherWidth := sourceWidth * 2
image1 := image.NewRGBA(image.Rect(0, 0, cypherWidth, cypherHeight))
image2 := image.NewRGBA(image.Rect(0, 0, cypherWidth, cypherHeight))
for x := 0; x <= sourceWidth; x++ {
for y := 0; y <= sourceHeight; y++ {
setPixel(x, y, template.At(x, y), image1, image2)
}
}
writeCypers(image1, image2)
}
// cut out the image and return individual channels with image.Image
// no encoding of JPEG
func cut(original image.Image, db *map[string][3]float64, tileSize, x1, y1, x2, y2 int) <-chan image.Image {
c := make(chan image.Image)
sp := image.Point{0, 0}
go func() {
newimage := image.NewNRGBA(image.Rect(x1, y1, x2, y2))
for y := y1; y < y2; y = y + tileSize {
for x := x1; x < x2; x = x + tileSize {
r, g, b, _ := original.At(x, y).RGBA()
color := [3]float64{float64(r), float64(g), float64(b)}
nearest := nearest(color, db)
file, err := os.Open(nearest)
if err == nil {
img, _, err := image.Decode(file)
if err == nil {
t := resize(img, tileSize)
tile := t.SubImage(t.Bounds())
tileBounds := image.Rect(x, y, x+tileSize, y+tileSize)
draw.Draw(newimage, tileBounds, tile, sp, draw.Src)
} else {
fmt.Println("error in decoding nearest", err, nearest)
}
} else {
fmt.Println("error opening file when creating mosaic:", nearest)
}
file.Close()
}
}
c <- newimage.SubImage(newimage.Rect)
}()
return c
}
func (this *Signer) GetMoreLineImage(text string, text_color image.Image, l int, fix_top, fix_bottom int) (image.Image, error) {
r := image.Rect(0, 0, 414, 96)
img := image.NewNRGBA(r)
c := freetype.NewContext()
c.SetDPI(this.Dpi)
c.SetFont(this.font)
c.SetFontSize(this.FontSize)
c.SetClip(img.Bounds())
c.SetDst(img)
c.SetSrc(text_color)
//pt := freetype.Pt(0, 0)
pt := freetype.Pt(0, 0+int(c.PointToFix32(this.FontSize)>>8))
var err error
limit := c.PixToFix32(l)
str := strings.Split(text, "\r\n")
for i, s := range str {
pt, err = c.DrawString(s, pt, limit)
if err != nil {
fmt.Println("c.DrawString(%s) error(%v)", s, err)
return nil, err
}
if i < len(str)-1 {
pt.Y += c.PointToFix32(this.FontSize * 1.5)
}
}
x, y := l, c.Fix32ToPix(pt.Y)
sub_r := image.Rect(0, 0, x+20, y+(fix_bottom-fix_top))
sub_img := image.NewNRGBA(sub_r)
draw.Draw(sub_img, sub_r, img, image.Point{0, fix_top}, draw.Src)
return sub_img, nil
}
// makeTestImages generates an RGBA and a grayscale image and returns
// testImages containing the JPEG encoded form as bytes and the expected color
// model of the image when decoded.
func makeTestImages() ([]testImage, error) {
var ims []testImage
w := bytes.NewBuffer(nil)
im1 := image.NewRGBA(image.Rect(0, 0, width, height))
for i := range im1.Pix {
switch {
case i%4 == 3:
im1.Pix[i] = 255
default:
im1.Pix[i] = uint8(i)
}
}
if err := jpeg.Encode(w, im1, nil); err != nil {
return nil, err
}
ims = append(ims, testImage{im: im1, buf: w.Bytes()})
w = bytes.NewBuffer(nil)
im2 := image.NewGray(image.Rect(0, 0, width, height))
for i := range im2.Pix {
im2.Pix[i] = uint8(i)
}
if err := jpeg.Encode(w, im2, nil); err != nil {
return nil, err
}
ims = append(ims, testImage{im: im2, buf: w.Bytes()})
return ims, nil
}
// NewImage creates an Image of the given size.
//
// Both a host-memory *image.RGBA and a GL texture are created.
func NewImage(w, h int) *Image {
dx := roundToPower2(w)
dy := roundToPower2(h)
// TODO(crawshaw): Using VertexAttribPointer we can pass texture
// data with a stride, which would let us use the exact number of
// pixels on the host instead of the rounded up power 2 size.
m := image.NewRGBA(image.Rect(0, 0, dx, dy))
glimage.Do(glInit)
img := &Image{
RGBA: m.SubImage(image.Rect(0, 0, w, h)).(*image.RGBA),
Texture: gl.GenTexture(),
texWidth: dx,
texHeight: dy,
}
// TODO(crawshaw): We don't have the context on a finalizer. Find a way.
// runtime.SetFinalizer(img, func(img *Image) { gl.DeleteTexture(img.Texture) })
gl.BindTexture(gl.TEXTURE_2D, img.Texture)
gl.TexImage2D(gl.TEXTURE_2D, 0, dx, dy, gl.RGBA, gl.UNSIGNED_BYTE, nil)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MAG_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_MIN_FILTER, gl.LINEAR)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_S, gl.CLAMP_TO_EDGE)
gl.TexParameteri(gl.TEXTURE_2D, gl.TEXTURE_WRAP_T, gl.CLAMP_TO_EDGE)
return img
}
func Crop(m image.Image, r image.Rectangle, w, h int) image.Image {
if w < 0 || h < 0 {
return nil
}
if w == 0 || h == 0 || r.Dx() <= 0 || r.Dy() <= 0 {
return image.NewRGBA64(image.Rect(0, 0, w, h))
}
curw, curh := r.Min.X, r.Min.Y
img := image.NewRGBA(image.Rect(0, 0, w, h))
for y := 0; y < h; y++ {
for x := 0; x < w; x++ {
// Get a source pixel.
subx := curw + x
suby := curh + y
r32, g32, b32, a32 := m.At(subx, suby).RGBA()
r := uint8(r32 >> 8)
g := uint8(g32 >> 8)
b := uint8(b32 >> 8)
a := uint8(a32 >> 8)
img.SetRGBA(x, y, color.RGBA{r, g, b, a})
}
}
return img
}
func BenchmarkEncode(b *testing.B) {
b.StopTimer()
bo := image.Rect(0, 0, 640, 480)
rnd := rand.New(rand.NewSource(123))
// Restrict to a 256-color paletted image to avoid quantization path.
palette := make(color.Palette, 256)
for i := range palette {
palette[i] = color.RGBA{
uint8(rnd.Intn(256)),
uint8(rnd.Intn(256)),
uint8(rnd.Intn(256)),
255,
}
}
img := image.NewPaletted(image.Rect(0, 0, 640, 480), palette)
for y := bo.Min.Y; y < bo.Max.Y; y++ {
for x := bo.Min.X; x < bo.Max.X; x++ {
img.Set(x, y, palette[rnd.Intn(256)])
}
}
b.SetBytes(640 * 480 * 4)
b.StartTimer()
for i := 0; i < b.N; i++ {
Encode(ioutil.Discard, img, nil)
}
}
func main() {
flag.Parse()
rand.Seed(time.Now().UTC().UnixNano())
out, err := os.Create(*outfile)
if err != nil {
fmt.Fprintf(os.Stderr, "ERROR: %v\n", err)
os.Exit(1)
}
imgRect := image.Rect(0, 0, 200, 200)
img := image.NewGray(imgRect)
draw.Draw(img, img.Bounds(), &image.Uniform{color.White}, image.ZP, draw.Src)
for y := 0; y < 200; y += 10 {
for x := 0; x < 200; x += 10 {
fill := &image.Uniform{color.Black}
if rand.Intn(10)%2 == 0 {
fill = &image.Uniform{color.White}
}
draw.Draw(img, image.Rect(x, y, x+10, y+10), fill, image.ZP, draw.Src)
}
}
err = png.Encode(out, img)
if err != nil {
fmt.Fprintf(os.Stderr, "ERROR: %v\n", err)
os.Exit(2)
}
fmt.Printf("Wrote random image to \"%s\"\n", *outfile)
os.Exit(0)
}