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var frame, img_frame;
var timeout, raf_id, start_t = 0, old_t = 0, pause_t = 0
var paused = false, dragging = false, rendering = false, scrolling = false, deferring = false, scrollTimeout = null
var fps = 30
function choose (){
loading = true
$("#url").val(this.src)
loadImage(this.src, ready)
}
function load(){
var newImageURL = $("#url").val()
loading = true
if (newImageURL != imageURL) {
loadImage(newImageURL, ready)
status("loading")
}
}
function ready(){
loading = false
status("")
if (window.gif) {
frame = gif.frames[0]
actual_w = w = cc.canvas.width = frame.ctx.canvas.width
actual_h = h = cc.canvas.height = frame.ctx.canvas.height
for (var i=0, f; f=gif.frames[i]; i++){
f.cloneData = f.ctx.getImageData(0,0,w,h)
}
}
else if (window.img) {
fc = cq(img.width, img.height)
fc.drawImage(img, 0, 0)
frame = img_frame = { ctx: fc.context }
actual_w = w = cc.canvas.width = frame.ctx.canvas.width
actual_h = h = cc.canvas.height = frame.ctx.canvas.height
frame.cloneData = frame.ctx.getImageData(0,0,w,h)
}
else {
cc.canvas.width = w
cc.canvas.height = h
shader_build()
}
displayWidthHeight(w, h)
}
function displayWidthHeight(width, height){
$("#width").val(width)
$("#height").val(height)
}
function giveFrame(t){
if (window.gif) {
if (gif.currentFrame) {
return gif.frames[gif.currentFrame(t)]
}
else if (gif.frames) {
return gif.frames[0]
}
}
if (window.img) {
return img_frame
}
else {
return empty_frame()
}
}
function empty_frame(){
actual_w = w = w || 400
actual_h = h = h || 266
var cx = cq(w, h).fillStyle("rgba(255,255,255,255)").fillRect(0,0,w,h)
return { ctx: cx.context, cloneData: cx.getImageData(0,0,w,h) }
}
function feedback_frame(){
return { ctx: cc.context, cloneData: cc.getImageData(0,0,w,h) }
}
function reset(){
start_t = old_t
pause_t = 0
pause(false)
$("#workspace img").remove()
$("#workspace canvas").show()
draw(0)
}
function pause(state){
$("#pause").toggleClass("paused", paused = typeof state == "boolean" ? state : ! paused).html(paused ? "paused" : "pause")
}
function step_forward(){
var step = $("#framedelay").float() * 1000 || 100
old_t += step
draw(old_t)
pause(true)
}
function animate(t){
raf_id = requestAnimationFrame(animate);
var step_t = t - old_t
old_t = t
if (paused || dragging || rendering || scrolling || deferring) {
pause_t += step_t
if (scrolling) {
scrolling = false
deferring = true
}
else {
deferring = false
}
return
}
// var timing = +(new Date())
draw(t)
// timing = +(new Date()) - timing
fps = avg(fps, 1000/step_t, 4)
// status(~~(fps) + " fps")
}
function draw(t) {
t -= start_t
t -= pause_t
frame = giveFrame(t)
shade(frame, t)
}
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