diff options
Diffstat (limited to 'unicorn/Unicorn2.go')
| -rw-r--r-- | unicorn/Unicorn2.go | 40 |
1 files changed, 31 insertions, 9 deletions
diff --git a/unicorn/Unicorn2.go b/unicorn/Unicorn2.go index 04722f7..5dcc6c2 100644 --- a/unicorn/Unicorn2.go +++ b/unicorn/Unicorn2.go @@ -5,6 +5,7 @@ package unicorn import ( "image" + "image/color/palette" "image/gif" "time" ) @@ -18,7 +19,7 @@ type Unicorn2 interface { SetGif(*gif.GIF) // Starts the rendering goroutine - StartRender() + StartRender() chan bool // Must be implemented to actually render the image to device renderImage(image.Image) @@ -42,11 +43,26 @@ func (u *BaseUnicorn2) SetGif(g *gif.GIF) { u.g = g } -// StartRender ... -// Starts rendering the image. If it's an animated image, -// renders animation frames. Return a channel to stop the -// image rendering. -func (u *FakeUnicorn2) StartRender() chan bool { +func NewBaseUnicorn2() *BaseUnicorn2 { + im := image.NewPaletted( + image.Rect(0, 0, 16, 16), + palette.WebSafe) + + gf := &gif.GIF{ + Image: []*image.Paletted{im}, + Delay: []int{50}, + Disposal: []byte{gif.DisposalBackground}, + BackgroundIndex: 0, // This is black in the websafe palette + } + + return &BaseUnicorn2{ + g: gf, + } +} + +// StartRenderBase ... +// Deals with the timing aspect of animated GIFs +func (u *BaseUnicorn2) StartRenderBase(renderImage func(image.Image)) chan bool { stopChan := make(chan bool) go func() { timer := time.NewTimer(0) @@ -59,14 +75,20 @@ func (u *FakeUnicorn2) StartRender() chan bool { running = false case <-timer.C: gf := u.GetGif() + + // Image could change underneath us, but there should always be 1 image at least. + if imageIndex >= len(gf.Image) { + imageIndex = 0 + } + im := gf.Image[imageIndex] delay := gf.Delay[imageIndex] //100ths of a second, 10^-2 - u.renderImage(im) - + renderImage(im) + timer.Reset(time.Duration(delay * 10000000)) // nanoseconds 10^-9 sec imageIndex = (imageIndex + 1) % len(gf.Image) } } }() return stopChan -}
\ No newline at end of file +} |