mirror of
https://github.com/cwinfo/matterbridge.git
synced 2024-12-29 13:55:40 +00:00
82 lines
2.0 KiB
Go
82 lines
2.0 KiB
Go
|
package libtgsconverter
|
||
|
|
|
||
|
|
import "bytes"
|
||
|
|
|
||
|
|
import "image"
|
||
|
|
import "image/color"
|
||
|
|
import "image/gif"
|
||
|
|
|
||
|
|
type togif struct {
|
||
|
|
gif gif.GIF
|
||
|
|
images []image.Image
|
||
|
|
prev_frame *image.RGBA
|
||
|
|
}
|
||
|
|
|
||
|
|
func(to_gif *togif) init(w uint, h uint, options ConverterOptions) {
|
||
|
|
to_gif.gif.Config.Width = int(w)
|
||
|
|
to_gif.gif.Config.Height = int(h)
|
||
|
|
}
|
||
|
|
|
||
|
|
func(to_gif *togif) SupportsAnimation() bool {
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
|
||
|
|
func (to_gif *togif) AddFrame(image *image.RGBA, fps uint) error {
|
||
|
|
var fps_int = int(1.0 / float32(fps) * 100.)
|
||
|
|
if to_gif.prev_frame != nil && sameImage(to_gif.prev_frame, image) {
|
||
|
|
to_gif.gif.Delay[len(to_gif.gif.Delay) - 1] += fps_int
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
to_gif.gif.Image = append(to_gif.gif.Image, nil)
|
||
|
|
to_gif.gif.Delay = append(to_gif.gif.Delay, fps_int)
|
||
|
|
to_gif.gif.Disposal = append(to_gif.gif.Disposal, gif.DisposalBackground)
|
||
|
|
to_gif.images = append(to_gif.images, image)
|
||
|
|
to_gif.prev_frame = image
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
|
||
|
|
func (to_gif *togif) Result() []byte {
|
||
|
|
q := medianCutQuantizer{mode, nil, false}
|
||
|
|
p := q.quantizeMultiple(make([]color.Color, 0, 256), to_gif.images)
|
||
|
|
// Add transparent entry finally
|
||
|
|
var trans_idx uint8 = 0
|
||
|
|
if q.reserveTransparent {
|
||
|
|
trans_idx = uint8(len(p))
|
||
|
|
}
|
||
|
|
var id_map = make(map[uint32]uint8)
|
||
|
|
for i, img := range to_gif.images {
|
||
|
|
pi := image.NewPaletted(img.Bounds(), p)
|
||
|
|
for y := 0; y < img.Bounds().Dy(); y++ {
|
||
|
|
for x := 0; x < img.Bounds().Dx(); x++ {
|
||
|
|
c := img.At(x, y)
|
||
|
|
cr, cg, cb, ca := c.RGBA()
|
||
|
|
cid := (cr >> 8) << 16 | cg | (cb >> 8)
|
||
|
|
if q.reserveTransparent && ca == 0 {
|
||
|
|
pi.Pix[pi.PixOffset(x, y)] = trans_idx
|
||
|
|
} else if val, ok := id_map[cid]; ok {
|
||
|
|
pi.Pix[pi.PixOffset(x, y)] = val
|
||
|
|
} else {
|
||
|
|
val := uint8(p.Index(c))
|
||
|
|
pi.Pix[pi.PixOffset(x, y)] = val
|
||
|
|
id_map[cid] = val
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
to_gif.gif.Image[i] = pi
|
||
|
|
}
|
||
|
|
if q.reserveTransparent {
|
||
|
|
p = append(p, color.RGBA{0, 0, 0, 0})
|
||
|
|
}
|
||
|
|
for _, img := range to_gif.gif.Image {
|
||
|
|
img.Palette = p
|
||
|
|
}
|
||
|
|
to_gif.gif.Config.ColorModel = p
|
||
|
|
var data []byte
|
||
|
|
w := bytes.NewBuffer(data)
|
||
|
|
err := gif.EncodeAll(w, &to_gif.gif)
|
||
|
|
if err != nil {
|
||
|
|
return nil
|
||
|
|
}
|
||
|
|
return w.Bytes()
|
||
|
|
}
|