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Optimizes functions to not create arrays

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This commit is contained in:
Yury Delendik 2014-08-04 11:12:51 -05:00
parent cb81bd6be6
commit f750e35224
4 changed files with 92 additions and 111 deletions
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70
src/core/pattern.js
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@ -122,29 +122,7 @@ Shadings.RadialAxial = (function RadialAxialClosure() {
this.extendEnd = extendEnd;
var fnObj = dict.get('Function');
var fn;
if (isArray(fnObj)) {
var fnArray = [];
for (var j = 0, jj = fnObj.length; j < jj; j++) {
var obj = xref.fetchIfRef(fnObj[j]);
if (!isPDFFunction(obj)) {
error('Invalid function');
}
fnArray.push(PDFFunction.parse(xref, obj));
}
fn = function radialAxialColorFunction(arg) {
var out = [];
for (var i = 0, ii = fnArray.length; i < ii; i++) {
out.push(fnArray[i](arg)[0]);
}
return out;
};
} else {
if (!isPDFFunction(fnObj)) {
error('Invalid function');
}
fn = PDFFunction.parse(xref, fnObj);
}
var fn = PDFFunction.parseArray(xref, fnObj);
// 10 samples seems good enough for now, but probably won't work
// if there are sharp color changes. Ideally, we would implement
@ -162,9 +140,12 @@ Shadings.RadialAxial = (function RadialAxialClosure() {
return;
}
var color = new Float32Array(cs.numComps), ratio = new Float32Array(1);
var rgbColor;
for (var i = t0; i <= t1; i += step) {
rgbColor = cs.getRgb(fn([i]), 0);
ratio[0] = i;
fn(ratio, 0, color, 0);
rgbColor = cs.getRgb(color, 0);
var cssColor = Util.makeCssRgb(rgbColor);
colorStops.push([(i - t0) / diff, cssColor]);
}
@ -232,6 +213,12 @@ Shadings.Mesh = (function MeshClosure() {
this.context = context;
this.buffer = 0;
this.bufferLength = 0;
var numComps = context.numComps;
this.tmpCompsBuf = new Float32Array(numComps);
var csNumComps = context.colorSpace;
this.tmpCsCompsBuf = context.colorFn ? new Float32Array(csNumComps) :
this.tmpCompsBuf;
}
MeshStreamReader.prototype = {
get hasData() {
@ -302,15 +289,16 @@ Shadings.Mesh = (function MeshClosure() {
var scale = bitsPerComponent < 32 ? 1 / ((1 << bitsPerComponent) - 1) :
2.3283064365386963e-10; // 2 ^ -32
var decode = this.context.decode;
var components = [];
var components = this.tmpCompsBuf;
for (var i = 0, j = 4; i < numComps; i++, j += 2) {
var ci = this.readBits(bitsPerComponent);
components.push(ci * scale * (decode[j + 1] - decode[j]) + decode[j]);
components[i] = ci * scale * (decode[j + 1] - decode[j]) + decode[j];
}
var color = this.tmpCsCompsBuf;
if (this.context.colorFn) {
components = this.context.colorFn(components);
this.context.colorFn(components, 0, color, 0);
}
return this.context.colorSpace.getRgb(components, 0);
return this.context.colorSpace.getRgb(color, 0);
}
};
@ -716,31 +704,7 @@ Shadings.Mesh = (function MeshClosure() {
cs.getRgb(dict.get('Background'), 0) : null;
var fnObj = dict.get('Function');
var fn;
if (!fnObj) {
fn = null;
} else if (isArray(fnObj)) {
var fnArray = [];
for (var j = 0, jj = fnObj.length; j < jj; j++) {
var obj = xref.fetchIfRef(fnObj[j]);
if (!isPDFFunction(obj)) {
error('Invalid function');
}
fnArray.push(PDFFunction.parse(xref, obj));
}
fn = function radialAxialColorFunction(arg) {
var out = [];
for (var i = 0, ii = fnArray.length; i < ii; i++) {
out.push(fnArray[i](arg)[0]);
}
return out;
};
} else {
if (!isPDFFunction(fnObj)) {
error('Invalid function');
}
fn = PDFFunction.parse(xref, fnObj);
}
var fn = fnObj ? PDFFunction.parseArray(xref, fnObj) : null;
this.coords = [];
this.colors = [];