pdfjs-dist

Generic build of PDF.js library.

Tree: 01f03fe393

History

Rob Wu 01f03fe393 Optimize PNG compression in SVG backend on Node.js Use the environment's zlib implementation if available to get reasonably-sized SVG files when an XObject image is converted to PNG. The generated PNG is not optimal because we do not use a PNG predictor. Futher, when our SVG backend is run in a browser, the generated PNG images will still be unnecessarily large (though the use of blob:-URLs when available should reduce the impact on memory usage). If we want to optimize PNG images in browsers too, we can either try to use a DEFLATE library such as pako, or re-use our XObject image painting logic in src/display/canvas.js. This potential improvement is not implemented by this commit Tested with: - Node.js 8.1.3 (uses zlib) - Node.js 0.11.12 (uses zlib) - Node.js 0.10.48 (falls back to inferior existing implementation). - Chrome 59.0.3071.86 - Firefox 54.0 Tests: Unit test on Node.js: ``` $ gulp lib $ JASMINE_CONFIG_PATH=test/unit/clitests.json node ./node_modules/.bin/jasmine --filter=SVG ``` Unit test in browser: Run `gulp server` and open http://localhost:8888/test/unit/unit_test.html?spec=SVGGraphics To verify that the patch works as desired, ``` $ node examples/node/pdf2svg.js test/pdfs/xobject-image.pdf $ du -b svgdump/xobject-image-1.svg # ^ Calculates the file size. Confirm that the size is small # (784 instead of 80664 bytes). ```		8 years ago
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annotation_spec.js	Fix inconsistent spacing and trailing commas in objects in `test/` files, so we can enable the `comma-dangle` and `object-curly-spacing` ESLint rules later on	8 years ago
api_spec.js	Preventing from using the same canvas for multiple render()	8 years ago
bidi_spec.js	Convert the files in the `/test/unit` folder to ES6 modules	8 years ago
cff_parser_spec.js	Fix inconsistent spacing and trailing commas in objects in `test/` files, so we can enable the `comma-dangle` and `object-curly-spacing` ESLint rules later on	8 years ago
clitests.json	Optimize PNG compression in SVG backend on Node.js	8 years ago
cmap_spec.js	Enable the `object-shorthand` ESLint rule	8 years ago
crypto_spec.js	Convert the files in the `/test/unit` folder to ES6 modules	8 years ago
custom_spec.js	Fix inconsistent spacing and trailing commas in objects in `test/` files, so we can enable the `comma-dangle` and `object-curly-spacing` ESLint rules later on	8 years ago
display_svg_spec.js	Optimize PNG compression in SVG backend on Node.js	8 years ago
document_spec.js	Convert the files in the `/test/unit` folder to ES6 modules	8 years ago
dom_utils_spec.js	Convert the files in the `/test/unit` folder to ES6 modules	8 years ago
evaluator_spec.js	Fix inconsistent spacing and trailing commas in objects in `test/` files, so we can enable the `comma-dangle` and `object-curly-spacing` ESLint rules later on	8 years ago
fonts_spec.js	Enable the `object-shorthand` ESLint rule	8 years ago
function_spec.js	Fix inconsistent spacing and trailing commas in objects in `test/` files, so we can enable the `comma-dangle` and `object-curly-spacing` ESLint rules later on	8 years ago
jasmine-boot.js	Optimize PNG compression in SVG backend on Node.js	8 years ago
metadata_spec.js	Convert the files in the `/test/unit` folder to ES6 modules	8 years ago
murmurhash3_spec.js	Convert the files in the `/test/unit` folder to ES6 modules	8 years ago
network_spec.js	Fix inconsistent spacing and trailing commas in objects in `test/` files, so we can enable the `comma-dangle` and `object-curly-spacing` ESLint rules later on	8 years ago
parser_spec.js	Ignore line-breaks between operator and digit in `Lexer.getNumber`	8 years ago
primitives_spec.js	Enable the `object-shorthand` ESLint rule	8 years ago
stream_spec.js	Fix inconsistent spacing and trailing commas in objects in `test/` files, so we can enable the `comma-dangle` and `object-curly-spacing` ESLint rules later on	8 years ago
test_utils.js	Adds additional parameter so background color of canvas can be set	8 years ago
testreporter.js	Enable the `object-shorthand` ESLint rule	8 years ago
type1_parser_spec.js	Fix inconsistent spacing and trailing commas in objects in `test/` files, so we can enable the `comma-dangle` and `object-curly-spacing` ESLint rules later on	8 years ago
ui_utils_spec.js	Convert the files in the `/test/unit` folder to ES6 modules	8 years ago
unicode_spec.js	Convert the files in the `/test/unit` folder to ES6 modules	8 years ago
unit_test.html	Replaces RequireJS to SystemJS.	8 years ago
util_spec.js	Added sendWithStream method in MessageHandler.	8 years ago
util_stream_spec.js	Added sendWithStream method in MessageHandler.	8 years ago