func TestEncode(t *testing.T) {
for _, filename := range []string{"cat", "matt"} {
var (
err error
file *os.File
g *gif.GIF
)
file, err = os.Open("test/" + filename + ".gif")
if err != nil {
t.Errorf("os.Open '%s'", err)
}
g, err = gif.DecodeAll(file)
if err != nil {
t.Errorf("DecodeAll error '%s'", err)
}
file, _ = ioutil.TempFile("", filename)
err = EncodeAll(file, g)
if err != nil {
t.Errorf("EncodeAll error '%s'", err)
}
file.Seek(0, os.SEEK_SET) // rewind tmp file
g, err = gif.DecodeAll(file)
if err != nil {
t.Errorf("DecodeAll error '%s'", err)
}
}
}
func FuzzAll(data []byte) int {
cfg, err := gif.DecodeConfig(bytes.NewReader(data))
if err != nil {
return 0
}
if cfg.Width*cfg.Height > 1e6 {
return 0
}
img, err := gif.DecodeAll(bytes.NewReader(data))
if err != nil {
return 0
}
w := new(bytes.Buffer)
err = gif.EncodeAll(w, img)
if err != nil {
panic(err)
}
img1, err := gif.DecodeAll(w)
if err != nil {
panic(err)
}
if img.LoopCount == 0 && img1.LoopCount == -1 {
// https://github.com/golang/go/issues/11287
img1.LoopCount = 0
}
// https://github.com/golang/go/issues/11288
img1.Disposal = img.Disposal
if !fuzz.DeepEqual(img, img1) {
fmt.Printf("gif0: %#v\n", img)
fmt.Printf("gif1: %#v\n", img1)
panic("gif changed")
}
return 1
}
func TestSaveGifIntoFileSystem(t *testing.T) {
var user = User{Name: "jinzhu"}
if avatar, err := os.Open("test/test.gif"); err == nil {
var frames int
if g, err := gif.DecodeAll(avatar); err == nil {
frames = len(g.Image)
}
avatar.Seek(0, 0)
user.Avatar.Scan(avatar)
if err := db.Save(&user).Error; err == nil {
if _, err := os.Stat(path.Join("public", user.Avatar.URL())); err != nil {
t.Errorf("should find saved user avatar")
}
var newUser User
db.First(&newUser, user.ID)
newUser.Avatar.Scan(`{"CropOptions": {"small1": {"X": 5, "Y": 5, "Height": 10, "Width": 20}, "small2": {"X": 0, "Y": 0, "Height": 10, "Width": 20}}, "Crop": true}`)
db.Save(&newUser)
if newUser.Avatar.URL() == user.Avatar.URL() {
t.Errorf("url should be different after crop")
}
file, err := os.Open(path.Join("public", newUser.Avatar.URL("small1")))
if err != nil {
t.Errorf("Failed open croped image")
}
if g, err := gif.DecodeAll(file); err == nil {
if g.Config.Width != 20 || g.Config.Height != 10 {
t.Errorf("gif should be croped successfully")
}
for _, image := range g.Image {
if image.Rect.Dx() != 20 || image.Rect.Dy() != 10 {
t.Errorf("gif's frames should be croped successfully, but it is %vx%v", image.Rect.Dx(), image.Rect.Dy())
}
}
if frames != len(g.Image) || frames == 0 {
t.Errorf("Gif's frames should be same")
}
} else {
t.Errorf("Failed to decode croped gif image")
}
} else {
t.Errorf("should saved user successfully")
}
} else {
panic("file doesn't exist")
}
}
func main() {
if len(os.Args) != 2 {
log.Fatalf("Missing the required filename parameter\n")
}
filename := os.Args[1]
var wg sync.WaitGroup
fh, err := os.Open(filename)
if err != nil {
log.Fatalf("Failed to open '%s' - {Error: %v}\n", filename, err)
}
gifs, err := gif.DecodeAll(fh)
if err != nil {
log.Fatalf("Failed to decode '%s' - {Error: %v}\n", filename, err)
}
wg.Add(len(gifs.Image))
for idx, image := range gifs.Image {
newFileName := fmt.Sprintf("%s.%d.png", filename, idx)
go writeImage(&wg, image, newFileName)
}
wg.Wait()
}
func NewLgtm(file *multipart.File, header *multipart.FileHeader) (*Lgtm, error) {
input, err := gif.DecodeAll(*file)
if err != nil {
return nil, err
}
output, err := yosage.Generate(input)
if err != nil {
return nil, err
}
var b bytes.Buffer
writer := bufio.NewWriter(&b)
err = gif.EncodeAll(writer, output)
if err != nil {
return nil, err
}
writer.Flush()
re := regexp.MustCompile(`\.(gif|GIF)$`)
return &Lgtm{
Filename: re.ReplaceAllString(header.Filename, "") + "_lgtm.gif",
Data: base64.StdEncoding.EncodeToString(b.Bytes()),
}, nil
}
func main() {
flag.Parse()
if len(flag.Args()) == 0 || config.Help {
flag.Usage()
os.Exit(1)
}
f, err := openFile(flag.Args()[0])
exitOnError(err)
g, err := gif.DecodeAll(f)
exitOnError(err)
state := State{
Gif: g,
Config: config,
}
gc := GameCore{
TickTime: time.Millisecond * 50,
OnInit: state.OnInit,
OnEvent: state.OnEvent,
OnTick: state.OnTick,
}
err = gc.Run()
exitOnError(err)
}
func NewAnim(r io.Reader) *Anim {
a := new(Anim)
g, err := gif.DecodeAll(r)
if err != nil {
log.Fatal(err)
}
a.raw = g
a.frameCount = len(g.Image)
log.Printf("Loaded GIF containing %d frames.\n",
a.frameCount)
a.frames = make([]image.Image, a.frameCount)
a.elapsed = make([]int, a.frameCount)
for i := 0; i < a.frameCount; i++ {
// Generate an Image for each frame
p := g.Image[i]
a.frames[i] = p.SubImage(p.Rect)
// The frame delay is specified in 100ths of a second,
// so multiply by 10 to get milliseconds.
frameLength := g.Delay[i] * 10
frameStart := 0
if i > 0 {
frameStart = a.elapsed[i-1] + frameLength
}
a.elapsed[i] = frameStart
a.duration += frameLength
}
log.Printf("Total duration: %.2fs\n", float32(a.duration)/1000.0)
return a
}
func process_file(filename string) error {
f, err := os.Open(filename)
if err != nil {
return err
}
defer f.Close()
reader := bufio.NewReader(f)
g, err := gif.DecodeAll(reader)
if err != nil {
return err
}
err = debarf_image(g)
of, err := os.Create("out.gif")
if err != nil {
return err
}
defer of.Close()
writer := bufio.NewWriter(of)
err = gif.EncodeAll(writer, g)
if err != nil {
return err
}
return err
}
func GetInfoForBytes(filename string, data []byte) (*FileInfo, *AppError) {
size := len(data)
var mimeType string
extension := filepath.Ext(filename)
isImage := IsFileExtImage(extension)
if isImage {
mimeType = GetImageMimeType(extension)
} else {
mimeType = mime.TypeByExtension(extension)
}
hasPreviewImage := isImage
if mimeType == "image/gif" {
// just show the gif itself instead of a preview image for animated gifs
if gifImage, err := gif.DecodeAll(bytes.NewReader(data)); err != nil {
return nil, NewLocAppError("GetInfoForBytes", "model.file_info.get.gif.app_error", nil, "filename="+filename)
} else {
hasPreviewImage = len(gifImage.Image) == 1
}
}
return &FileInfo{
Filename: filename,
Size: size,
Extension: extension[1:],
MimeType: mimeType,
HasPreviewImage: hasPreviewImage,
}, nil
}
func main() {
file, err := os.Open("pacman.gif")
if err != nil {
log.Fatalf("Error opening file: %s\n", err)
}
g, err := gif.DecodeAll(file)
if err != nil {
log.Fatalf("Error decoding gif: %s\n", err)
}
for {
for _, img := range g.Image {
for x := 0; x < 40; x++ {
for y := 0; y < 40; y++ {
color := img.At(x, y)
r, g, b, _ := color.RGBA()
colorString := fmt.Sprintf("%02x%02x%02x", uint8(r), uint8(g), uint8(b))
fmt.Println(colorString)
resp, err := http.Get(fmt.Sprintf("http://localhost:1234/draw?x=%d&y=%d&color=%s&layer=foize", x, y, colorString))
if err != nil {
log.Fatalf("error drawing with http.Get: %s\n", err)
}
if resp.StatusCode != http.StatusOK {
log.Fatalf("error drawing, have http status %s\n", resp.Status)
}
resp.Body.Close()
}
}
time.Sleep(300 * time.Millisecond)
}
}
}
func main() {
if len(os.Args) > 1 {
fn := regexp.MustCompile(".gif$")
for _, v := range os.Args[1:] {
f, e := os.Open(v)
iserr(e)
log.Println("[ Read GIF ] File=", f.Name())
gif, e := gif.DecodeAll(f)
f.Close()
iserr(e)
log.Println("[ Create PNG ] Size=", len(gif.Image)*150, 150)
dst := image.NewRGBA(image.Rect(0, 0, len(gif.Image)*150, 150))
iserr(e)
log.Println("[ Slice GIF ] Size=", len(gif.Image))
for index, src := range gif.Image {
b := src.Bounds()
m, n := 150/2-b.Dx()/2+index*150, 150/2-b.Dy()/2
r := image.Rect(m, n, m+b.Dx(), n+b.Dy())
log.Println("GIF drawto PNG for", index)
draw.Draw(dst, r, src, image.ZP, draw.Src)
}
log.Println("[ Write PNG ]")
out, e := os.Create(fmt.Sprintf("%s.png", fn.ReplaceAllLiteralString(f.Name(), "")))
iserr(e)
e = png.Encode(out, dst)
iserr(e)
out.Close()
}
log.Println("Convert Success. Press any key to exit.")
var s string
fmt.Scanf("%s", &s)
} else {
fmt.Println("Usage:", os.Args[0], "<filename>")
}
}
// Handle implements Handler.
func (hdr *Handler) Handle(im *imageserver.Image, params imageserver.Params) (*imageserver.Image, error) {
if im.Format != "gif" {
return nil, &imageserver.ImageError{Message: fmt.Sprintf("image format is not gif: %s", im.Format)}
}
if !hdr.Processor.Change(params) {
return im, nil
}
g, err := gif.DecodeAll(bytes.NewReader(im.Data))
if err != nil {
return nil, &imageserver.ImageError{Message: err.Error()}
}
g, err = hdr.Processor.Process(g, params)
if err != nil {
return nil, err
}
buf := new(bytes.Buffer)
err = gif.EncodeAll(buf, g)
if err != nil {
return nil, &imageserver.ImageError{Message: err.Error()}
}
im = &imageserver.Image{
Format: "gif",
Data: buf.Bytes(),
}
return im, nil
}
func crop(filename string) {
f, err := os.Open("testdata/" + filename + ".gif")
if err != nil {
log.Fatal(err.Error())
}
defer f.Close()
im, err := gif.DecodeAll(f)
if err != nil {
log.Fatal(err.Error())
}
firstFrame := im.Image[0]
imgBounds := firstFrame.Bounds()
img := image.NewRGBA(imgBounds)
for index, frame := range im.Image {
bounds := frame.Bounds()
draw.Draw(img, bounds, frame, bounds.Min, draw.Src)
im.Image[index] = ImageToPaletted(img.SubImage(image.Rect(
imgBounds.Min.X,
imgBounds.Min.Y+imgBounds.Dy()/4,
imgBounds.Max.X,
imgBounds.Max.Y-imgBounds.Dy()/4)))
}
out, err := os.Create(filename + ".out.gif")
if err != nil {
log.Fatal(err.Error())
}
defer out.Close()
gogif.EncodeAll(out, im)
}
// Process the GIF read from r, applying transform to each frame, and writing
// the result to w.
func Process(w io.Writer, r io.Reader, transform TransformFunc) error {
if transform == nil {
_, err := io.Copy(w, r)
return err
}
// Decode the original gif.
im, err := gif.DecodeAll(r)
if err != nil {
return err
}
// Create a new RGBA image to hold the incremental frames.
firstFrame := im.Image[0].Bounds()
b := image.Rect(0, 0, firstFrame.Dx(), firstFrame.Dy())
img := image.NewRGBA(b)
// Resize each frame.
for index, frame := range im.Image {
bounds := frame.Bounds()
draw.Draw(img, bounds, frame, bounds.Min, draw.Over)
im.Image[index] = imageToPaletted(transform(img), frame.Palette)
}
// Set image.Config to new height and width
im.Config.Width = im.Image[0].Bounds().Max.X
im.Config.Height = im.Image[0].Bounds().Max.Y
return gif.EncodeAll(w, im)
}
func writeGIF(filename string, imgs []image.Image) error {
f, err := os.Create(filename)
if err != nil {
return err
}
defer f.Close()
g := gif.GIF{
Image: make([]*image.Paletted, len(imgs)),
Delay: make([]int, len(imgs)),
}
b := make([]byte, 0, 1024)
for i, img := range imgs {
buf := bytes.NewBuffer(b)
if err = gif.Encode(buf, img, &gif.Options{NumColors: 256}); err != nil {
return err
}
gimg, err := gif.DecodeAll(buf)
if err != nil {
return err
}
g.Delay[i] = 0
g.Image[i] = gimg.Image[0]
}
return gif.EncodeAll(f, &g)
}
func main() {
var startFrame int
var frameCount int
flag.IntVar(&startFrame, "start", 0, "frame at wich the animation should start")
flag.IntVar(&frameCount, "count", 0, "amount of frames the animation should have")
flag.Parse()
inputFileName := flag.Arg(0)
outputFileName := flag.Arg(1)
in, err := os.Open(inputFileName)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
gifImage, err := gif.DecodeAll(in)
if err != nil {
log.Fatal(err)
}
img := gifImage.Image[0]
log.Println("converting...")
sim := simulation.New(img)
log.Println("simulating...")
for ; startFrame > 0; startFrame-- {
sim = sim.Step()
}
if 0 == frameCount {
sim, frameCount = sim.FindLooping()
}
log.Println("rendering...")
img.Palette[0] = color.Transparent
gifImage.Delay = make([]int, frameCount)
gifImage.Disposal = make([]byte, frameCount)
for i := range gifImage.Delay {
gifImage.Delay[i] = 1
}
gifImage.Image = sim.DrawAll(img, frameCount)
log.Println("writing...")
out, err := os.Create(outputFileName)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
err = gif.EncodeAll(out, gifImage)
if err != nil {
log.Fatal(err)
}
log.Println("done.")
}
func readGIF(filename string) (*gif.GIF, error) {
f, err := os.Open(filename)
if err != nil {
return nil, err
}
defer f.Close()
return gif.DecodeAll(f)
}
func makeGif(c appengine.Context, m *movie) ([]byte, error) {
palette := m.palette()
delay := int(100 / m.Speed)
anim := gif.GIF{LoopCount: 0}
for _, pix := range m.Frames {
bounds := image.Rect(0, 0, m.Width*pixelsize, m.Height*pixelsize)
scaled := make([]byte, bounds.Max.X*bounds.Max.Y)
idx := 0
for y := 0; y < m.Height; y++ {
for i := 0; i < pixelsize; i++ {
for x := 0; x < m.Width; x++ {
pixel := pix[x+y*m.Width] - startColorChar
for j := 0; j < pixelsize; j++ {
scaled[idx] = pixel
idx++
}
}
}
}
img := image.Paletted{
Pix: scaled,
Stride: m.Width * pixelsize,
Rect: bounds,
Palette: palette,
}
anim.Image = append(anim.Image, &img)
anim.Delay = append(anim.Delay, delay)
}
var buf bytes.Buffer
if err := gifencoder.EncodeAll(&buf, anim); err != nil {
c.Errorf("can't encode gif: %v", err)
return nil, err
}
if appengine.IsDevAppServer() {
// Validate gif by decoding it
r := bytes.NewReader(buf.Bytes())
size := r.Len()
if _, err := gif.DecodeAll(r); err != nil {
remaining := r.Len()
offset := size - remaining
c.Errorf("created an invalid gif: %v", err)
c.Errorf("error at offset %v (%x)", offset, offset)
}
}
return buf.Bytes(), nil
}
func NewGIFManipulator(reader io.ReadSeeker, format string, image image.Image) (Manipulator, error) {
if _, err := reader.Seek(0, 0); err != nil {
return nil, err
}
g, err := gif.DecodeAll(reader)
if err != nil {
return nil, err
}
return &GIFManipulator{gif: g}, nil
}
func download(url string) (*gif.GIF, error) {
//log.Printf("GET %s ..", url)
res, err := http.Get(url)
if err != nil {
return nil, err
}
defer res.Body.Close()
if res.StatusCode != 200 {
return nil, errors.New(fmt.Sprintf("error response '%d'", res.StatusCode))
}
return gif.DecodeAll(res.Body)
}
func main() {
args := os.Args[1:]
if len(args) > 2 || len(args) == 0 {
showUsage()
return
}
input := args[0]
fmt.Println("Reading file", input)
file, err := os.Open(input)
if err != nil {
fmt.Println(err)
return
}
img, err := gif.DecodeAll(file)
if err != nil {
fmt.Println(err)
return
}
reversed := new(gif.GIF)
reversed.Delay = img.Delay
reversed.LoopCount = img.LoopCount
reversed.Image = reverse(img.Image)
fmt.Println("Reversing..")
var output string
if len(args) == 2 {
output = strings.TrimSuffix(args[1], filepath.Ext(input)) + ".gif"
} else {
output = strings.TrimSuffix(input, filepath.Ext(input)) + "_reversed.gif"
}
result, err := os.Create(output)
if err != nil {
fmt.Println(err)
return
}
gif.EncodeAll(result, reversed)
fmt.Println("✓ Saved", output)
}
func uploadEmojiImage(id string, imageData *multipart.FileHeader) *model.AppError {
file, err := imageData.Open()
if err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.open.app_error", nil, "")
}
defer file.Close()
buf := bytes.NewBuffer(nil)
io.Copy(buf, file)
// make sure the file is an image and is within the required dimensions
if config, _, err := image.DecodeConfig(bytes.NewReader(buf.Bytes())); err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.image.app_error", nil, err.Error())
} else if config.Width > MaxEmojiWidth || config.Height > MaxEmojiHeight {
data := buf.Bytes()
newbuf := bytes.NewBuffer(nil)
if info, err := model.GetInfoForBytes(imageData.Filename, data); err != nil {
return err
} else if info.MimeType == "image/gif" {
if gif_data, err := gif.DecodeAll(bytes.NewReader(data)); err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.large_image.gif_decode_error", nil, "")
} else {
resized_gif := resizeEmojiGif(gif_data)
if err := gif.EncodeAll(newbuf, resized_gif); err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.large_image.gif_encode_error", nil, "")
}
if err := app.WriteFile(newbuf.Bytes(), getEmojiImagePath(id)); err != nil {
return err
}
}
} else {
if img, _, err := image.Decode(bytes.NewReader(data)); err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.large_image.decode_error", nil, "")
} else {
resized_image := resizeEmoji(img, config.Width, config.Height)
if err := png.Encode(newbuf, resized_image); err != nil {
return model.NewLocAppError("uploadEmojiImage", "api.emoji.upload.large_image.encode_error", nil, "")
}
if err := app.WriteFile(newbuf.Bytes(), getEmojiImagePath(id)); err != nil {
return err
}
}
}
} else {
if err := app.WriteFile(buf.Bytes(), getEmojiImagePath(id)); err != nil {
return err
}
}
return nil
}
// NewRevisitImageFromMsg constructs a RevisitImage from the
// contents of a RevisitMsg
func NewRevisitImageFromMsg(r *RevisitMsg) (*RevisitImage, error) {
ri := &RevisitImage{
Rgbas: make([]image.RGBA, 0),
Palette: make([]color.Palette, 0),
Delay: make([]int, 0),
LoopCount: 0,
}
switch r.ImageType() {
case "image/jpeg", "image/png":
src, _, err := image.Decode(r.ImageByteReader())
if err != nil {
return nil, err
}
b := src.Bounds()
rgba := image.NewRGBA(image.Rect(0, 0, b.Dx(), b.Dy()))
draw.Draw(rgba, rgba.Bounds(), src, b.Min, draw.Src)
ri.Rgbas = append(ri.Rgbas, *rgba)
ri.Delay = append(ri.Delay, 0)
ri.LoopCount = 0
ri.ImgType = r.ImageType()
return ri, nil
case "image/gif":
gifs, err := gif.DecodeAll(r.ImageByteReader())
if err != nil {
return nil, err
}
for _, src := range gifs.Image {
b := src.Bounds()
rgba := image.NewRGBA(image.Rect(0, 0, b.Dx(), b.Dy()))
draw.Draw(rgba, rgba.Bounds(), src, b.Min, draw.Src)
ri.Rgbas = append(ri.Rgbas, *rgba)
ri.Palette = append(ri.Palette, src.Palette)
ri.Delay = append(ri.Delay, 0)
}
ri.LoopCount = gifs.LoopCount
ri.ImgType = r.ImageType()
return ri, nil
default:
return nil, errors.New("invalid image type")
}
}
func main() {
out, err := os.Create("./output.gif")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
dir, _ := ioutil.ReadDir(".")
var imgs []*image.Paletted
for _, file := range dir {
switch ext := path.Ext(file.Name()); ext {
case ".jpg":
f, _ := os.Open(file.Name())
img, _ := jpeg.Decode(f)
var opt gif.Options
opt.NumColors = 256
buf := new(bytes.Buffer)
gif.Encode(buf, img, &opt)
g, _ := gif.DecodeAll(buf)
imgs = append(imgs, g.Image[0])
default:
fmt.Println(ext)
}
}
g := new(gif.GIF)
g.Image = imgs
var opt gif.Options
opt.NumColors = 256
g.Delay = []int{100, 100, 100}
g.LoopCount = 1000
err = gif.EncodeAll(out, g)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println("Generated image to output.gif \n")
}
func main() {
dir, _ := ioutil.ReadDir(".")
var imgs []*image.Paletted
for _, file := range dir {
f, _ := os.Open(file.Name())
defer f.Close()
if ext := path.Ext(file.Name()); ext != ".jpg" && ext != ".JPG" && ext != ".jpeg" && ext != ".png" {
fmt.Printf("File not an image: %s\n", file.Name())
} else {
img, err := rs.ResizePixels(f, 400, 400)
if err != nil {
fmt.Println(err)
}
var opt gif.Options
opt.NumColors = 256
buf := new(bytes.Buffer)
gif.Encode(buf, img, &opt)
g, _ := gif.DecodeAll(buf)
imgs = append(imgs, g.Image[0])
}
}
g := new(gif.GIF)
g.Image = imgs
g.Delay = evenDelay(100, len(g.Image))
g.LoopCount = 1000
var opt gif.Options
opt.NumColors = 256
out, err := os.Create("./output.gif")
if err != nil {
fmt.Println(err)
os.Exit(1)
}
err = gif.EncodeAll(out, g)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
fmt.Println("Generated image to output.gif \n")
}
func TestResizeEmoji(t *testing.T) {
// try to resize a jpeg image within MaxEmojiWidth and MaxEmojiHeight
small_img_data := createTestJpeg(t, MaxEmojiWidth, MaxEmojiHeight)
if small_img, _, err := image.Decode(bytes.NewReader(small_img_data)); err != nil {
t.Fatal("failed to decode jpeg bytes to image.Image")
} else {
resized_img := resizeEmoji(small_img, small_img.Bounds().Dx(), small_img.Bounds().Dy())
if resized_img.Bounds().Dx() > MaxEmojiWidth || resized_img.Bounds().Dy() > MaxEmojiHeight {
t.Fatal("resized jpeg width and height should not be greater than MaxEmojiWidth or MaxEmojiHeight")
}
if resized_img != small_img {
t.Fatal("should've returned small_img itself")
}
}
// try to resize a jpeg image
jpeg_data := createTestJpeg(t, 256, 256)
if jpeg_img, _, err := image.Decode(bytes.NewReader(jpeg_data)); err != nil {
t.Fatal("failed to decode jpeg bytes to image.Image")
} else {
resized_jpeg := resizeEmoji(jpeg_img, jpeg_img.Bounds().Dx(), jpeg_img.Bounds().Dy())
if resized_jpeg.Bounds().Dx() > MaxEmojiWidth || resized_jpeg.Bounds().Dy() > MaxEmojiHeight {
t.Fatal("resized jpeg width and height should not be greater than MaxEmojiWidth or MaxEmojiHeight")
}
}
// try to resize a png image
png_data := createTestJpeg(t, 256, 256)
if png_img, _, err := image.Decode(bytes.NewReader(png_data)); err != nil {
t.Fatal("failed to decode png bytes to image.Image")
} else {
resized_png := resizeEmoji(png_img, png_img.Bounds().Dx(), png_img.Bounds().Dy())
if resized_png.Bounds().Dx() > MaxEmojiWidth || resized_png.Bounds().Dy() > MaxEmojiHeight {
t.Fatal("resized png width and height should not be greater than MaxEmojiWidth or MaxEmojiHeight")
}
}
// try to resize an animated gif
gif_data := createTestAnimatedGif(t, 256, 256, 10)
if gif_img, err := gif.DecodeAll(bytes.NewReader(gif_data)); err != nil {
t.Fatal("failed to decode gif bytes to gif.GIF")
} else {
resized_gif := resizeEmojiGif(gif_img)
if resized_gif.Config.Width > MaxEmojiWidth || resized_gif.Config.Height > MaxEmojiHeight {
t.Fatal("resized gif width and height should not be greater than MaxEmojiWidth or MaxEmojiHeight")
}
if len(resized_gif.Image) != len(gif_img.Image) {
t.Fatal("resized gif should have the same number of frames as original gif")
}
}
}
func main() {
inputFileName := os.Args[1]
outputFileName := os.Args[2]
in, err := os.Open(inputFileName)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
gifImage, err := gif.DecodeAll(in)
if err != nil {
log.Fatal(err)
}
img := gifImage.Image[0]
log.Println("converting...")
simulation := NewSimulation(img)
log.Println("simulating...")
var frameCount int
simulation, frameCount = simulation.FindLooping()
log.Println("rendering...")
img.Palette[0] = color.Transparent
gifImage.Delay = make([]int, frameCount)
gifImage.Disposal = make([]byte, frameCount)
for i := range gifImage.Delay {
gifImage.Delay[i] = 1
}
gifImage.Image = simulation.DrawAll(img, frameCount)
log.Println("writing...")
out, err := os.Create(outputFileName)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
err = gif.EncodeAll(out, gifImage)
if err != nil {
log.Fatal(err)
}
log.Println("done.")
}
// Image Handler
// Reads the stored GIF & overlay for the authenticated user and returns a new GIF with the overlay copied onto each frame of the input GIF
func imageHandler(w http.ResponseWriter, r *http.Request) {
token, _ := jwt.ParseFromRequest(r, hmacKeyFunc)
issuer := token.Claims["iss"].(string)
gfFile, err1 := os.Open(getFileName("gif:" + issuer))
overlayFile, err2 := os.Open(getFileName("overlay:" + issuer))
if err1 != nil || err2 != nil {
sendResponse(w, 400, map[string]string{
"error": "Error while reading images",
})
return
}
// Decode images
dst, err1 := gif.DecodeAll(gfFile)
src, _, err2 := image.Decode(overlayFile)
if err1 != nil || err2 != nil {
sendResponse(w, 400, map[string]string{
"error": "Error while decoding images",
})
return
}
// Create location for the draw
pt := new(image.Point)
x, err := strconv.Atoi(r.URL.Query().Get("x"))
if err != nil {
x = 0
}
y, err := strconv.Atoi(r.URL.Query().Get("y"))
if err != nil {
y = 0
}
pt.X = x
pt.Y = y
// Draw the overlay over each frame of the GIF
for _, frame := range dst.Image {
draw.Draw(frame, frame.Bounds(), src, *pt, draw.Over)
}
// Encode image to base64
buffer := new(bytes.Buffer)
gif.EncodeAll(buffer, dst)
fmt.Fprint(w, base64.StdEncoding.EncodeToString(buffer.Bytes()))
}
func main() {
var err error
if cursorImage, err = ebiten.NewImage(4, 4, ebiten.FilterNearest); err != nil {
log.Fatal(err)
}
cursorImage.Fill(color.White)
var speed, scale, width, height int
flag.IntVar(&speed, "speed", 15, "simulation steps per second")
flag.IntVar(&scale, "scale", 16, "pixel scale factor")
flag.IntVar(&width, "width", 64, "width of the simulation")
flag.IntVar(&height, "height", 64, "height of the simulation")
flag.Parse()
flag.Args()
cursorPosition = image.Point{width / 2, height / 2}
simulationTimer = time.Tick(time.Second / time.Duration(speed))
if flag.NArg() == 1 {
inputFileName := flag.Arg(0)
in, err := os.Open(inputFileName)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
gifImage, err := gif.DecodeAll(in)
if err != nil {
log.Fatal(err)
}
simulationImage = gifImage.Image[0]
simulationImage.Palette[0] = color.Transparent
} else {
p := color.Palette{
color.Black,
color.RGBA{0x88, 0, 0, 0xFF},
color.RGBA{0xFF, 0, 0, 0xFF},
color.RGBA{0xFF, 0x22, 0, 0xFF},
color.RGBA{0xFF, 0x44, 0, 0xFF},
color.RGBA{0xFF, 0x66, 0, 0xFF},
color.RGBA{0xFF, 0x88, 0, 0xFF},
color.RGBA{0xFF, 0xAA, 0, 0xFF},
}
simulationImage = image.NewPaletted(image.Rect(0, 0, width, height), p)
}
reloadSimulation()
if err := ebiten.Run(update, simulationImage.Bounds().Dx(), simulationImage.Bounds().Dy(), scale, "Wired Logic"); err != nil {
log.Fatal(err)
}
}
func LoadGIF(path string) (imgs []image.Image, err error) {
f, e := os.Open(path)
if e != nil {
return nil, e
}
GIF, e := gif.DecodeAll(f)
if e != nil {
return nil, e
}
imgs = make([]image.Image, len(GIF.Image))
for i, img := range GIF.Image {
imgs[i] = img
}
return imgs, nil
}
