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Fix the remaining no-var failures, which couldn't be handled automatically, in the src/core/jpg.js file

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This commit is contained in:
Jonas Jenwald 2021-05-05 12:36:52 +02:00
parent 1e5a179600
commit d0a299713c
1 changed files with 21 additions and 24 deletions
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45
src/core/jpg.js
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@ -81,14 +81,13 @@ const JpegImage = (function JpegImageClosure() {
function buildHuffmanTable(codeLengths, values) {
let k = 0,
code = [],
i,
j,
length = 16;
while (length > 0 && !codeLengths[length - 1]) {
length--;
}
code.push({ children: [], index: 0 });
const code = [{ children: [], index: 0 }];
let p = code[0],
q;
for (i = 0; i < length; i++) {
@ -267,8 +266,8 @@ const JpegImage = (function JpegImageClosure() {
eobrun--;
return;
}
let k = spectralStart,
e = spectralEnd;
let k = spectralStart;
const e = spectralEnd;
while (k <= e) {
const rs = decodeHuffman(component.huffmanTableAC);
const s = rs & 15,
@ -774,8 +773,8 @@ const JpegImage = (function JpegImageClosure() {
function prepareComponents(frame) {
const mcusPerLine = Math.ceil(frame.samplesPerLine / 8 / frame.maxH);
const mcusPerColumn = Math.ceil(frame.scanLines / 8 / frame.maxV);
for (let i = 0; i < frame.components.length; i++) {
component = frame.components[i];
for (let i = 0, ii = frame.components.length; i < ii; i++) {
const component = frame.components[i];
const blocksPerLine = Math.ceil(
(Math.ceil(frame.samplesPerLine / 8) * component.h) / frame.maxH
);
@ -795,7 +794,7 @@ const JpegImage = (function JpegImageClosure() {
frame.mcusPerColumn = mcusPerColumn;
}
var offset = 0;
let offset = 0;
let jfif = null;
let adobe = null;
let frame, resetInterval;
@ -813,7 +812,7 @@ const JpegImage = (function JpegImageClosure() {
offset += 2;
markerLoop: while (fileMarker !== /* EOI (End of Image) = */ 0xffd9) {
var i, j, l;
let i, j, l;
switch (fileMarker) {
case 0xffe0: // APP0 (Application Specific)
case 0xffe1: // APP1
@ -832,7 +831,7 @@ const JpegImage = (function JpegImageClosure() {
case 0xffee: // APP14
case 0xffef: // APP15
case 0xfffe: // COM (Comment)
var appData = readDataBlock();
const appData = readDataBlock();
if (fileMarker === 0xffe0) {
// 'JFIF\x00'
@ -880,8 +879,8 @@ const JpegImage = (function JpegImageClosure() {
case 0xffdb: // DQT (Define Quantization Tables)
const quantizationTablesLength = readUint16(data, offset);
offset += 2;
var quantizationTablesEnd = quantizationTablesLength + offset - 2;
var z;
const quantizationTablesEnd = quantizationTablesLength + offset - 2;
let z;
while (offset < quantizationTablesEnd) {
const quantizationTableSpec = data[offset++];
const tableData = new Uint16Array(64);
@ -924,12 +923,11 @@ const JpegImage = (function JpegImageClosure() {
offset += 2;
frame.components = [];
frame.componentIds = {};
var componentsCount = data[offset++],
componentId;
var maxH = 0,
const componentsCount = data[offset++];
let maxH = 0,
maxV = 0;
for (i = 0; i < componentsCount; i++) {
componentId = data[offset];
const componentId = data[offset];
const h = data[offset + 1] >> 4;
const v = data[offset + 1] & 15;
if (maxH < h) {
@ -991,22 +989,21 @@ const JpegImage = (function JpegImageClosure() {
offset += 2; // Skip marker length.
var selectorsCount = data[offset++];
var components = [],
component;
const selectorsCount = data[offset++],
components = [];
for (i = 0; i < selectorsCount; i++) {
const index = data[offset++];
const componentIndex = frame.componentIds[index];
component = frame.components[componentIndex];
const component = frame.components[componentIndex];
component.index = index;
const tableSpec = data[offset++];
component.huffmanTableDC = huffmanTablesDC[tableSpec >> 4];
component.huffmanTableAC = huffmanTablesAC[tableSpec & 15];
components.push(component);
}
var spectralStart = data[offset++];
var spectralEnd = data[offset++];
var successiveApproximation = data[offset++];
const spectralStart = data[offset++],
spectralEnd = data[offset++],
successiveApproximation = data[offset++];
try {
const processed = decodeScan(
data,
@ -1082,8 +1079,8 @@ const JpegImage = (function JpegImageClosure() {
this.jfif = jfif;
this.adobe = adobe;
this.components = [];
for (i = 0; i < frame.components.length; i++) {
component = frame.components[i];
for (let i = 0, ii = frame.components.length; i < ii; i++) {
const component = frame.components[i];
// Prevent errors when DQT markers are placed after SOF{n} markers,
// by assigning the `quantizationTable` entry after the entire image