// Start animate driver new version
func StartDriver(renderer chan *framebuffer.FrameBuffer) {
// Start the animator go routine
go func() {
// The animations in play from the UI (default all off)
var animators []segNameAndAnimator = make([]segNameAndAnimator, 1)
animators[0] = segNameAndAnimator{"All", newStaticColour(framebuffer.NewRgbFromInt(0))}
var lastRenderedFrameBuffer *framebuffer.FrameBuffer
frameCounter := 0
for {
select {
// Request to render a frame buffer
case fb := <-renderer:
renderStartTime := time.Now()
// Create / Copy frame buffer to be rendered
if lastRenderedFrameBuffer == nil {
fb = framebuffer.NewFrameBuffer()
} else {
fb = lastRenderedFrameBuffer.CloneFrameBuffer()
}
// Animate and return updated frame buffer
for _, v := range animators {
// Resolve the segment to animate, based on string name
if seg, err := framebuffer.GetNamedSegment(fb, v.namedSegment); err == nil {
v.animator.animateNextFrame(frameCounter, seg)
}
}
// Report render time and send buffer
stats.AddFrameRenderTimeSample(time.Since(renderStartTime))
renderer <- fb
lastRenderedFrameBuffer = fb
// Request animation update
case currentAnimations := <-animationChanged:
animators = buildAnimatorList(currentAnimations)
lastRenderedFrameBuffer = nil
frameCounter = 0
}
}
}()
}
// High level request to light the first stripLength LEDs of a physical strip
func AnimateStripLength(stripIndex uint, stripLength uint) {
// Create a new frame buffer as a model for physical strip lengths
fb := framebuffer.NewFrameBuffer()
// Check request is for a valid strip and length
segments := make([]SegmentAction, 0)
if stripIndex < uint(len(fb.Strips)) && stripLength <= uint(len(fb.Strips[stripIndex].Leds)) {
// Clear all lights
segments = append(segments, SegmentAction{"All", "Static", "0"})
// Special pXX:YY segment id to address physical strip XX of length YY
// NOTE: if a strip is reverse direction then this may not show up on
// the virtual display which shows only the FIRST 20 LEDs
segId := "p" + strconv.Itoa(int(stripIndex)) + ":" + strconv.Itoa(int(stripLength))
segments = append(segments, SegmentAction{segId, "Static", "808080"})
} else {
// Invalid request, light all LEDS red
segments = append(segments, SegmentAction{"All", "Static", "800000"})
}
// Perform the animation
animationChanged <- segments
}
