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var shader_build = function(){
var fn_str = document.getElementById('shader').value
if (!fn_str.length) fn_str = ""
try {
var fn = new Function('x','y','t','d', fn_str)
shader = fn
shade = shade_error_handling
} catch (e) {
throw Error ("Shader compilation error")
}
}
var r,g,b,a;
function shade_no_error_handling(frame, t){
if (! t || isNaN(t)) throw Error ("No time specified")
if (! frame) throw Error ("No frame specified")
var imgData = frame.ctx.getImageData(0,0,w,h)
var data = imgData.data
var clone = frame.cloneData.data
var realw = w, realh = h, v, index
for (var x = 0; x < w; x++) {
for (var y = 0; y < h; y++) {
q = 4*(y*w+x)
r = data[q], g = data[q+1], b = data[q+2], a = data[q+3]
result = shader(x,y,t,clone)
data[q] = r
data[q+1] = g
data[q+2] = b
data[q+3] = a
w = realw, h = realh
}
}
cc.putImageData(imgData,0,0)
}
function shade_error_handling(frame, t){
if (! t || isNaN(t)) throw Error ("No time specified")
if (! frame) throw Error ("No frame specified")
var imgData = frame.ctx.getImageData(0,0,w,h)
var data = imgData.data
var clone = frame.cloneData.data
try {
var realw = w, realh = h, v, index
for (var x = 0; x < w; x++) {
for (var y = 0; y < h; y++) {
q = 4*(y*w+x)
r = data[q], g = data[q+1], b = data[q+2], a = data[q+3]
result = shader(x,y,t,clone)
data[q] = r
data[q+1] = g
data[q+2] = b
data[q+3] = a
w = realw, h = realh
}
}
}
catch(e){
// console.log(e.stack)
throw Error ("Shader execution error")
}
cc.putImageData(imgData,0,0)
shade = shade_no_error_handling
}
shade = shade_error_handling
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