}
r = 0;
}
- error('JPX error: Out of packets');
+ throw 'Out of packets';
};
}
function ResolutionLayerComponentPositionIterator(context) {
}
l = 0;
}
- error('JPX error: Out of packets');
+ throw 'Out of packets';
};
}
function buildPackets(context) {
new ResolutionLayerComponentPositionIterator(context);
break;
default:
- error('JPX error: Unsupported progression order ' + progressionOrder);
+ throw 'Unsupported progression order ' + progressionOrder;
}
}
function parseTilePackets(context, data, offset, dataLength) {
}
function JpxImage() {
+ this.failOnCorruptedImage = false;
}
JpxImage.prototype = {
load: function jpxImageLoad(url) {
},
parseCodestream: function jpxImageParseCodestream(data, start, end) {
var context = {};
- var position = start;
- while (position < end) {
- var code = readUint16(data, position);
- position += 2;
-
- var length = 0, j;
- switch (code) {
- case 0xFF4F: // Start of codestream (SOC)
- context.mainHeader = true;
- break;
- case 0xFFD9: // End of codestream (EOC)
- break;
- case 0xFF51: // Image and tile size (SIZ)
- length = readUint16(data, position);
- var siz = {};
- siz.Xsiz = readUint32(data, position + 4);
- siz.Ysiz = readUint32(data, position + 8);
- siz.XOsiz = readUint32(data, position + 12);
- siz.YOsiz = readUint32(data, position + 16);
- siz.XTsiz = readUint32(data, position + 20);
- siz.YTsiz = readUint32(data, position + 24);
- siz.XTOsiz = readUint32(data, position + 28);
- siz.YTOsiz = readUint32(data, position + 32);
- var componentsCount = readUint16(data, position + 36);
- siz.Csiz = componentsCount;
- var components = [];
- j = position + 38;
- for (var i = 0; i < componentsCount; i++) {
- var component = {
- precision: (data[j] & 0x7F) + 1,
- isSigned: !!(data[j] & 0x80),
- XRsiz: data[j + 1],
- YRsiz: data[j + 1]
- };
- calculateComponentDimensions(component, siz);
- components.push(component);
- }
- context.SIZ = siz;
- context.components = components;
- calculateTileGrids(context, components);
- context.QCC = [];
- context.COC = [];
- break;
- case 0xFF5C: // Quantization default (QCD)
- length = readUint16(data, position);
- var qcd = {};
- j = position + 2;
- var sqcd = data[j++];
- var spqcdSize, scalarExpounded;
- switch (sqcd & 0x1F) {
- case 0:
- spqcdSize = 8;
- scalarExpounded = true;
- break;
- case 1:
- spqcdSize = 16;
- scalarExpounded = false;
- break;
- case 2:
- spqcdSize = 16;
- scalarExpounded = true;
- break;
- default:
- error('JPX error: Invalid SQcd value ' + sqcd);
- }
- qcd.noQuantization = spqcdSize == 8;
- qcd.scalarExpounded = scalarExpounded;
- qcd.guardBits = sqcd >> 5;
- var spqcds = [];
- while (j < length + position) {
- var spqcd = {};
- if (spqcdSize == 8) {
- spqcd.epsilon = data[j++] >> 3;
- spqcd.mu = 0;
- } else {
- spqcd.epsilon = data[j] >> 3;
- spqcd.mu = ((data[j] & 0x7) << 8) | data[j + 1];
- j += 2;
+ try {
+ var position = start;
+ while (position < end) {
+ var code = readUint16(data, position);
+ position += 2;
+
+ var length = 0, j;
+ switch (code) {
+ case 0xFF4F: // Start of codestream (SOC)
+ context.mainHeader = true;
+ break;
+ case 0xFFD9: // End of codestream (EOC)
+ break;
+ case 0xFF51: // Image and tile size (SIZ)
+ length = readUint16(data, position);
+ var siz = {};
+ siz.Xsiz = readUint32(data, position + 4);
+ siz.Ysiz = readUint32(data, position + 8);
+ siz.XOsiz = readUint32(data, position + 12);
+ siz.YOsiz = readUint32(data, position + 16);
+ siz.XTsiz = readUint32(data, position + 20);
+ siz.YTsiz = readUint32(data, position + 24);
+ siz.XTOsiz = readUint32(data, position + 28);
+ siz.YTOsiz = readUint32(data, position + 32);
+ var componentsCount = readUint16(data, position + 36);
+ siz.Csiz = componentsCount;
+ var components = [];
+ j = position + 38;
+ for (var i = 0; i < componentsCount; i++) {
+ var component = {
+ precision: (data[j] & 0x7F) + 1,
+ isSigned: !!(data[j] & 0x80),
+ XRsiz: data[j + 1],
+ YRsiz: data[j + 1]
+ };
+ calculateComponentDimensions(component, siz);
+ components.push(component);
}
- spqcds.push(spqcd);
- }
- qcd.SPqcds = spqcds;
- if (context.mainHeader)
- context.QCD = qcd;
- else {
- context.currentTile.QCD = qcd;
- context.currentTile.QCC = [];
- }
- break;
- case 0xFF5D: // Quantization component (QCC)
- length = readUint16(data, position);
- var qcc = {};
- j = position + 2;
- var cqcc;
- if (context.SIZ.Csiz < 257)
- cqcc = data[j++];
- else {
- cqcc = readUint16(data, j);
- j += 2;
- }
- var sqcd = data[j++];
- var spqcdSize, scalarExpounded;
- switch (sqcd & 0x1F) {
- case 0:
- spqcdSize = 8;
- scalarExpounded = true;
- break;
- case 1:
- spqcdSize = 16;
- scalarExpounded = false;
- break;
- case 2:
- spqcdSize = 16;
- scalarExpounded = true;
- break;
- default:
- error('JPX error: Invalid SQcd value ' + sqcd);
- }
- qcc.noQuantization = spqcdSize == 8;
- qcc.scalarExpounded = scalarExpounded;
- qcc.guardBits = sqcd >> 5;
- var spqcds = [];
- while (j < length + position) {
- var spqcd = {};
- if (spqcdSize == 8) {
- spqcd.epsilon = data[j++] >> 3;
- spqcd.mu = 0;
- } else {
- spqcd.epsilon = data[j] >> 3;
- spqcd.mu = ((data[j] & 0x7) << 8) | data[j + 1];
+ context.SIZ = siz;
+ context.components = components;
+ calculateTileGrids(context, components);
+ context.QCC = [];
+ context.COC = [];
+ break;
+ case 0xFF5C: // Quantization default (QCD)
+ length = readUint16(data, position);
+ var qcd = {};
+ j = position + 2;
+ var sqcd = data[j++];
+ var spqcdSize, scalarExpounded;
+ switch (sqcd & 0x1F) {
+ case 0:
+ spqcdSize = 8;
+ scalarExpounded = true;
+ break;
+ case 1:
+ spqcdSize = 16;
+ scalarExpounded = false;
+ break;
+ case 2:
+ spqcdSize = 16;
+ scalarExpounded = true;
+ break;
+ default:
+ throw 'Invalid SQcd value ' + sqcd;
+ }
+ qcd.noQuantization = spqcdSize == 8;
+ qcd.scalarExpounded = scalarExpounded;
+ qcd.guardBits = sqcd >> 5;
+ var spqcds = [];
+ while (j < length + position) {
+ var spqcd = {};
+ if (spqcdSize == 8) {
+ spqcd.epsilon = data[j++] >> 3;
+ spqcd.mu = 0;
+ } else {
+ spqcd.epsilon = data[j] >> 3;
+ spqcd.mu = ((data[j] & 0x7) << 8) | data[j + 1];
+ j += 2;
+ }
+ spqcds.push(spqcd);
+ }
+ qcd.SPqcds = spqcds;
+ if (context.mainHeader)
+ context.QCD = qcd;
+ else {
+ context.currentTile.QCD = qcd;
+ context.currentTile.QCC = [];
+ }
+ break;
+ case 0xFF5D: // Quantization component (QCC)
+ length = readUint16(data, position);
+ var qcc = {};
+ j = position + 2;
+ var cqcc;
+ if (context.SIZ.Csiz < 257)
+ cqcc = data[j++];
+ else {
+ cqcc = readUint16(data, j);
j += 2;
}
- spqcds.push(spqcd);
- }
- qcc.SPqcds = spqcds;
- if (context.mainHeader)
- context.QCC[cqcc] = qcc;
- else
- context.currentTile.QCC[cqcc] = qcc;
- break;
- case 0xFF52: // Coding style default (COD)
- length = readUint16(data, position);
- var cod = {};
- j = position + 2;
- var scod = data[j++];
- cod.entropyCoderWithCustomPrecincts = !!(scod & 1);
- cod.sopMarkerUsed = !!(scod & 2);
- cod.ephMarkerUsed = !!(scod & 4);
- var codingStyle = {};
- cod.progressionOrder = data[j++];
- cod.layersCount = readUint16(data, j);
- j += 2;
- cod.multipleComponentTransform = data[j++];
-
- cod.decompositionLevelsCount = data[j++];
- cod.xcb = (data[j++] & 0xF) + 2;
- cod.ycb = (data[j++] & 0xF) + 2;
- var blockStyle = data[j++];
- cod.selectiveArithmeticCodingBypass = !!(blockStyle & 1);
- cod.resetContextProbabilities = !!(blockStyle & 2);
- cod.terminationOnEachCodingPass = !!(blockStyle & 4);
- cod.verticalyStripe = !!(blockStyle & 8);
- cod.predictableTermination = !!(blockStyle & 16);
- cod.segmentationSymbolUsed = !!(blockStyle & 32);
- cod.transformation = data[j++];
- if (cod.entropyCoderWithCustomPrecincts) {
- var precinctsSizes = {};
+ var sqcd = data[j++];
+ var spqcdSize, scalarExpounded;
+ switch (sqcd & 0x1F) {
+ case 0:
+ spqcdSize = 8;
+ scalarExpounded = true;
+ break;
+ case 1:
+ spqcdSize = 16;
+ scalarExpounded = false;
+ break;
+ case 2:
+ spqcdSize = 16;
+ scalarExpounded = true;
+ break;
+ default:
+ throw 'Invalid SQcd value ' + sqcd;
+ }
+ qcc.noQuantization = spqcdSize == 8;
+ qcc.scalarExpounded = scalarExpounded;
+ qcc.guardBits = sqcd >> 5;
+ var spqcds = [];
while (j < length + position) {
- var precinctsSize = data[j];
- precinctsSizes.push({
- PPx: precinctsSize & 0xF,
- PPy: precinctsSize >> 4
- });
+ var spqcd = {};
+ if (spqcdSize == 8) {
+ spqcd.epsilon = data[j++] >> 3;
+ spqcd.mu = 0;
+ } else {
+ spqcd.epsilon = data[j] >> 3;
+ spqcd.mu = ((data[j] & 0x7) << 8) | data[j + 1];
+ j += 2;
+ }
+ spqcds.push(spqcd);
+ }
+ qcc.SPqcds = spqcds;
+ if (context.mainHeader)
+ context.QCC[cqcc] = qcc;
+ else
+ context.currentTile.QCC[cqcc] = qcc;
+ break;
+ case 0xFF52: // Coding style default (COD)
+ length = readUint16(data, position);
+ var cod = {};
+ j = position + 2;
+ var scod = data[j++];
+ cod.entropyCoderWithCustomPrecincts = !!(scod & 1);
+ cod.sopMarkerUsed = !!(scod & 2);
+ cod.ephMarkerUsed = !!(scod & 4);
+ var codingStyle = {};
+ cod.progressionOrder = data[j++];
+ cod.layersCount = readUint16(data, j);
+ j += 2;
+ cod.multipleComponentTransform = data[j++];
+
+ cod.decompositionLevelsCount = data[j++];
+ cod.xcb = (data[j++] & 0xF) + 2;
+ cod.ycb = (data[j++] & 0xF) + 2;
+ var blockStyle = data[j++];
+ cod.selectiveArithmeticCodingBypass = !!(blockStyle & 1);
+ cod.resetContextProbabilities = !!(blockStyle & 2);
+ cod.terminationOnEachCodingPass = !!(blockStyle & 4);
+ cod.verticalyStripe = !!(blockStyle & 8);
+ cod.predictableTermination = !!(blockStyle & 16);
+ cod.segmentationSymbolUsed = !!(blockStyle & 32);
+ cod.transformation = data[j++];
+ if (cod.entropyCoderWithCustomPrecincts) {
+ var precinctsSizes = {};
+ while (j < length + position) {
+ var precinctsSize = data[j];
+ precinctsSizes.push({
+ PPx: precinctsSize & 0xF,
+ PPy: precinctsSize >> 4
+ });
+ }
+ cod.precinctsSizes = precinctsSizes;
}
- cod.precinctsSizes = precinctsSizes;
- }
-
- if (cod.sopMarkerUsed || cod.ephMarkerUsed ||
- cod.selectiveArithmeticCodingBypass ||
- cod.resetContextProbabilities ||
- cod.terminationOnEachCodingPass ||
- cod.verticalyStripe || cod.predictableTermination ||
- cod.segmentationSymbolUsed)
- error('JPX error: Unsupported COD options: ' + uneval(cod));
-
- if (context.mainHeader)
- context.COD = cod;
- else {
- context.currentTile.COD = cod;
- context.currentTile.COC = [];
- }
- break;
- case 0xFF90: // Start of tile-part (SOT)
- length = readUint16(data, position);
- var tile = {};
- tile.index = readUint16(data, position + 2);
- tile.length = readUint32(data, position + 4);
- tile.dataEnd = tile.length + position - 2;
- tile.partIndex = data[position + 8];
- tile.partsCount = data[position + 9];
-
- context.mainHeader = false;
- if (tile.partIndex == 0) {
- // reset component specific settings
- tile.COD = context.COD;
- tile.COC = context.COC.slice(0); // clone of the global COC
- tile.QCD = context.QCD;
- tile.QCC = context.QCC.slice(0); // clone of the global COC
- }
- context.currentTile = tile;
- break;
- case 0xFF93: // Start of data (SOD)
- var tile = context.currentTile;
- if (tile.partIndex == 0) {
- initializeTile(context, tile.index);
- buildPackets(context);
- }
- // moving to the end of the data
- length = tile.dataEnd - position;
+ if (cod.sopMarkerUsed || cod.ephMarkerUsed ||
+ cod.selectiveArithmeticCodingBypass ||
+ cod.resetContextProbabilities ||
+ cod.terminationOnEachCodingPass ||
+ cod.verticalyStripe || cod.predictableTermination ||
+ cod.segmentationSymbolUsed)
+ throw 'Unsupported COD options: ' + uneval(cod);
+
+ if (context.mainHeader)
+ context.COD = cod;
+ else {
+ context.currentTile.COD = cod;
+ context.currentTile.COC = [];
+ }
+ break;
+ case 0xFF90: // Start of tile-part (SOT)
+ length = readUint16(data, position);
+ var tile = {};
+ tile.index = readUint16(data, position + 2);
+ tile.length = readUint32(data, position + 4);
+ tile.dataEnd = tile.length + position - 2;
+ tile.partIndex = data[position + 8];
+ tile.partsCount = data[position + 9];
+
+ context.mainHeader = false;
+ if (tile.partIndex == 0) {
+ // reset component specific settings
+ tile.COD = context.COD;
+ tile.COC = context.COC.slice(0); // clone of the global COC
+ tile.QCD = context.QCD;
+ tile.QCC = context.QCC.slice(0); // clone of the global COC
+ }
+ context.currentTile = tile;
+ break;
+ case 0xFF93: // Start of data (SOD)
+ var tile = context.currentTile;
+ if (tile.partIndex == 0) {
+ initializeTile(context, tile.index);
+ buildPackets(context);
+ }
- parseTilePackets(context, data, position, length);
- break;
- case 0xFF64: // Comment (COM)
- length = readUint16(data, position);
- // skipping content
- break;
- default:
- error('JPX error: Unknown codestream code: ' + code.toString(16));
+ // moving to the end of the data
+ length = tile.dataEnd - position;
+
+ parseTilePackets(context, data, position, length);
+ break;
+ case 0xFF64: // Comment (COM)
+ length = readUint16(data, position);
+ // skipping content
+ break;
+ default:
+ throw 'Unknown codestream code: ' + code.toString(16);
+ }
+ position += length;
}
- position += length;
+ } catch (e) {
+ if (this.failOnCorruptedImage)
+ error('JPX error: ' + e);
+ else
+ warn('JPX error: ' + e + '. Trying to recover');
}
this.tiles = transformComponents(context);
this.width = context.SIZ.Xsiz - context.SIZ.XOsiz;
projects / pdf.js.git / commitdiff