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") imageWindow.document.write(""); imageWindow.document.close(); //copy the image into the empty img in the newly opened window: var exportImage = imageWindow.document.getElementById("exportImage"); exportImage.src = dataURL; } }; function SmokeNiceBG(_x0,_y0,_rad0,_x1,_y1,_rad1) { this.x0 = _x0; this.y0 = _y0; this.x1 = _x1; this.y1 = _y1; this.rad0 = _rad0; this.rad1 = _rad1; this.colorStops = []; } SmokeNiceBG.prototype.addColorStop = function(ratio,r,g,b) { if ((ratio < 0) || (ratio > 1)) { return; } var n; var newStop = {ratio:ratio, r:r, g:g, b:b}; if ((ratio >= 0) && (ratio <= 1)) { if (this.colorStops.length == 0) { this.colorStops.push(newStop); } else { var i = 0; var found = false; var len = this.colorStops.length; //search for proper place to put stop in order. while ((!found) && (i= 0) { ratio = (-b + Math.sqrt(discrim))/(2*a); if (ratio < 0) { ratio = 0; } else if (ratio > 1) { ratio = 1; } //find out what two stops this is between if (ratio == 1) { stopNumber = this.colorStops.length-1; } else { stopNumber = 0; found = false; while (!found) { found = (ratio < this.colorStops[stopNumber].ratio); if (!found) { stopNumber++; } } } //calculate color. r0 = this.colorStops[stopNumber-1].r; g0 = this.colorStops[stopNumber-1].g; b0 = this.colorStops[stopNumber-1].b; r1 = this.colorStops[stopNumber].r; g1 = this.colorStops[stopNumber].g; b1 = this.colorStops[stopNumber].b; ratio0 = this.colorStops[stopNumber-1].ratio; ratio1 = this.colorStops[stopNumber].ratio; f = (ratio-ratio0)/(ratio1-ratio0); r = r0 + (r1 - r0)*f; g = g0 + (g1 - g0)*f; b = b0 + (b1 - b0)*f; } else { r = r0; g = g0; b = b0; } //set color as float values in buffer arrays rBuffer.push(r); gBuffer.push(g); bBuffer.push(b); } //While converting floats to integer valued color values, apply Floyd-Steinberg dither. for (i = 0; i