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Introduce helper functions for parsing /Matrix and /BBox arrays

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This commit is contained in:
Jonas Jenwald 2024-04-30 08:47:14 +02:00
parent 52f7ff155d
commit 9b41bfc374
5 changed files with 63 additions and 69 deletions
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40
src/core/evaluator.js
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@ -53,6 +53,7 @@ import {
import { getTilingPatternIR, Pattern } from "./pattern.js";
import { getXfaFontDict, getXfaFontName } from "./xfa_fonts.js";
import { IdentityToUnicodeMap, ToUnicodeMap } from "./to_unicode_map.js";
import { isNumberArray, lookupMatrix, lookupNormalRect } from "./core_utils.js";
import { isPDFFunction, PDFFunctionFactory } from "./function.js";
import { Lexer, Parser } from "./parser.js";
import {
@ -73,7 +74,6 @@ import { getGlyphsUnicode } from "./glyphlist.js";
import { getMetrics } from "./metrics.js";
import { getUnicodeForGlyph } from "./unicode.js";
import { ImageResizer } from "./image_resizer.js";
import { isNumberArray } from "./core_utils.js";
import { MurmurHash3_64 } from "../shared/murmurhash3.js";
import { OperatorList } from "./operator_list.js";
import { PDFImage } from "./image.js";
@ -460,12 +460,8 @@ class PartialEvaluator {
localColorSpaceCache
) {
const dict = xobj.dict;
let matrix = dict.getArray("Matrix");
if (!isNumberArray(matrix, 6)) {
matrix = null;
}
let bbox = dict.getArray("BBox");
bbox = isNumberArray(bbox, 4) ? Util.normalizeRect(bbox) : null;
const matrix = lookupMatrix(dict.getArray("Matrix"), null);
const bbox = lookupNormalRect(dict.getArray("BBox"), null);
let optionalContent, groupOptions;
if (dict.has("OC")) {
@ -1578,10 +1574,7 @@ class PartialEvaluator {
localShadingPatternCache,
});
if (objId) {
let matrix = dict.getArray("Matrix");
if (!isNumberArray(matrix, 6)) {
matrix = null;
}
const matrix = lookupMatrix(dict.getArray("Matrix"), null);
operatorList.addOp(fn, ["Shading", objId, matrix]);
}
return undefined;
@ -3268,8 +3261,8 @@ class PartialEvaluator {
const currentState = stateManager.state.clone();
const xObjStateManager = new StateManager(currentState);
const matrix = xobj.dict.getArray("Matrix");
if (isNumberArray(matrix, 6)) {
const matrix = lookupMatrix(xobj.dict.getArray("Matrix"), null);
if (matrix) {
xObjStateManager.transform(matrix);
}
@ -4247,10 +4240,7 @@ class PartialEvaluator {
if (!descriptor) {
if (isType3Font) {
let bbox = dict.getArray("FontBBox");
if (!isNumberArray(bbox, 4)) {
bbox = [0, 0, 0, 0];
}
const bbox = lookupNormalRect(dict.getArray("FontBBox"), [0, 0, 0, 0]);
// FontDescriptor is only required for Type3 fonts when the document
// is a tagged pdf. Create a barbebones one to get by.
descriptor = new Dict(null);
@ -4440,14 +4430,14 @@ class PartialEvaluator {
}
}
let fontMatrix = dict.getArray("FontMatrix");
if (!isNumberArray(fontMatrix, 6)) {
fontMatrix = FONT_IDENTITY_MATRIX;
}
let bbox = descriptor.getArray("FontBBox") || dict.getArray("FontBBox");
if (!isNumberArray(bbox, 4)) {
bbox = undefined;
}
const fontMatrix = lookupMatrix(
dict.getArray("FontMatrix"),
FONT_IDENTITY_MATRIX
);
const bbox = lookupNormalRect(
descriptor.getArray("FontBBox") || dict.getArray("FontBBox"),
undefined
);
let ascent = descriptor.get("Ascent");
if (typeof ascent !== "number") {
ascent = undefined;