Yury Delendik
8 years ago
committed by
GitHub
9 changed files with 329 additions and 71 deletions
@ -0,0 +1,61 @@
@@ -0,0 +1,61 @@
|
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%PDF-1.1 |
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1 0 obj |
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<</Type/Catalog/Pages 2 0 R>> |
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endobj |
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2 0 obj |
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<</Type/Pages/Count 1/Kids[3 0 R]/MediaBox [0 0 200 100]>> |
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endobj |
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3 0 obj |
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<< |
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/Type/Page |
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/Parent 2 0 R |
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/Resources << |
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/XObject << /SomeImage 4 0 R >> |
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>> |
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/Contents 5 0 R |
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>> |
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endobj |
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4 0 obj |
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<< |
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/Type/XObject |
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/Subtype/Image |
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/Width 200 % The width or height directly affects the image's file size. |
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/Height 100 |
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/ColorSpace/DeviceRGB |
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/DecodeParms [] % Forces NativeImageDecoder.isSupported to return false. |
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/BitsPerComponent 8 |
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/Length 580 |
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/Filter [ /ASCIIHexDecode /DCTDecode ] |
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>> |
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% convert -size 1x1 xc:red jpeg:- | xxd -p -c40 |
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stream |
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ffd8ffe000104a46494600010100000100010000ffdb004300030202020202030202020303030304 |
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060404040404080606050609080a0a090809090a0c0f0c0a0b0e0b09090d110d0e0f101011100a0c |
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12131210130f101010ffdb00430103030304030408040408100b090b101010101010101010101010 |
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1010101010101010101010101010101010101010101010101010101010101010101010101010ffc0 |
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0011080001000103011100021101031101ffc40014000100000000000000000000000000000008ff |
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c40014100100000000000000000000000000000000ffc40015010101000000000000000000000000 |
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00000709ffc40014110100000000000000000000000000000000ffda000c03010002110311003f00 |
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3a03154dffd9 |
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endstream |
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endobj |
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5 0 obj |
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<</Length 14>> |
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stream |
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500 0 0 400 0 0 cm |
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/SomeImage Do |
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endstream |
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endobj |
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xref |
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0 6 |
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0000000000 65535 f |
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0000000008 00000 n |
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0000000054 00000 n |
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0000000128 00000 n |
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0000000246 00000 n |
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0000001201 00000 n |
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trailer |
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<</Root 1 0 R/Size 6>> |
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startxref |
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1281 |
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%%EOF |
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@ -0,0 +1,135 @@
@@ -0,0 +1,135 @@
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/* Copyright 2017 Mozilla Foundation |
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* |
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* Licensed under the Apache License, Version 2.0 (the "License"); |
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* you may not use this file except in compliance with the License. |
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* You may obtain a copy of the License at |
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* |
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* http://www.apache.org/licenses/LICENSE-2.0
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* |
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* Unless required by applicable law or agreed to in writing, software |
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* distributed under the License is distributed on an "AS IS" BASIS, |
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
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* See the License for the specific language governing permissions and |
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* limitations under the License. |
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*/ |
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/* globals __non_webpack_require__ */ |
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import { isNodeJS, NativeImageDecoding } from '../../src/shared/util'; |
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import { setStubs, unsetStubs } from '../../examples/node/domstubs'; |
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import { buildGetDocumentParams } from './test_utils'; |
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import { getDocument } from '../../src/display/api'; |
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import { SVGGraphics } from '../../src/display/svg'; |
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// withZlib(true, callback); = run test with require('zlib') if possible.
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// withZlib(false, callback); = run test without require('zlib').deflateSync.
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// The return value of callback is returned as-is.
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function withZlib(isZlibRequired, callback) { |
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if (isZlibRequired) { |
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// We could try to polyfill zlib in the browser, e.g. using pako.
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// For now, only support zlib functionality on Node.js
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if (!isNodeJS()) { |
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throw new Error('zlib test can only be run in Node.js'); |
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} |
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return callback(); |
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} |
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if (!isNodeJS()) { |
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// Assume that require('zlib') is unavailable in non-Node.
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return callback(); |
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} |
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var zlib = __non_webpack_require__('zlib'); |
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var deflateSync = zlib.deflateSync; |
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zlib.deflateSync = function() { |
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throw new Error('zlib.deflateSync is explicitly disabled for testing.'); |
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}; |
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try { |
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return callback(); |
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} finally { |
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zlib.deflateSync = deflateSync; |
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} |
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} |
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describe('SVGGraphics', function () { |
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var loadingTask; |
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var page; |
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beforeAll(function(done) { |
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loadingTask = getDocument(buildGetDocumentParams('xobject-image.pdf', { |
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nativeImageDecoderSupport: NativeImageDecoding.DISPLAY, |
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})); |
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loadingTask.promise.then(function(doc) { |
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doc.getPage(1).then(function(firstPage) { |
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page = firstPage; |
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done(); |
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}); |
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}); |
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}); |
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afterAll(function(done) { |
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loadingTask.destroy().then(done); |
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}); |
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describe('paintImageXObject', function() { |
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function getSVGImage() { |
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var svgGfx; |
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return page.getOperatorList().then(function(opList) { |
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var forceDataSchema = true; |
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svgGfx = new SVGGraphics(page.commonObjs, page.objs, forceDataSchema); |
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return svgGfx.loadDependencies(opList); |
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}).then(function() { |
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var svgImg; |
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// A mock to steal the svg:image element from paintInlineImageXObject.
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var elementContainer = { |
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appendChild(element) { |
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svgImg = element; |
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}, |
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}; |
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// This points to the XObject image in xobject-image.pdf.
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var xobjectObjId = { ref: 4, gen: 0, }; |
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if (isNodeJS()) { |
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setStubs(global); |
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} |
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try { |
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svgGfx.paintImageXObject(xobjectObjId, elementContainer); |
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} finally { |
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if (isNodeJS()) { |
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unsetStubs(global); |
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} |
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} |
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return svgImg; |
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}); |
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} |
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it('should produce a reasonably small svg:image', function() { |
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if (!isNodeJS()) { |
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pending('zlib.deflateSync is not supported in non-Node environments.'); |
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} |
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withZlib(true, getSVGImage).then(function(svgImg) { |
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expect(svgImg.nodeName).toBe('svg:image'); |
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expect(svgImg.getAttribute('width')).toBe('200px'); |
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expect(svgImg.getAttribute('height')).toBe('100px'); |
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var imgUrl = svgImg.getAttribute('xlink:href'); |
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// forceDataSchema = true, so the generated URL should be a data:-URL.
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expect(imgUrl).toMatch(/^data:image\/png;base64,/); |
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// Test whether the generated image has a reasonable file size.
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// I obtained a data URL of size 366 with Node 8.1.3 and zlib 1.2.11.
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// Without zlib (uncompressed), the size of the data URL was excessive
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// (80247).
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expect(imgUrl.length).toBeLessThan(367); |
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}); |
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}); |
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it('should produce a svg:image even if zlib is unavailable', function() { |
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withZlib(false, getSVGImage).then(function(svgImg) { |
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expect(svgImg.nodeName).toBe('svg:image'); |
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expect(svgImg.getAttribute('width')).toBe('200px'); |
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expect(svgImg.getAttribute('height')).toBe('100px'); |
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var imgUrl = svgImg.getAttribute('xlink:href'); |
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expect(imgUrl).toMatch(/^data:image\/png;base64,/); |
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// The size of our naively generated PNG file is excessive :(
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expect(imgUrl.length).toBe(80247); |
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}); |
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}); |
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}); |
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}); |
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