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fix(svg) adjust strategy for decoding JPEG images

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This commit is contained in:
巴里切罗 2017-05-08 11:32:44 +08:00
parent 0dbc68a6d6
commit 8d5d97264e
9 changed files with 66 additions and 15 deletions
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34
src/display/api.js
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@ -17,9 +17,9 @@
import {
createPromiseCapability, deprecated, error, getVerbosityLevel, globalScope,
info, InvalidPDFException, isArray, isArrayBuffer, isInt, isSameOrigin,
loadJpegStream, MessageHandler, MissingPDFException, PageViewport,
PasswordException, StatTimer, stringToBytes, UnexpectedResponseException,
UnknownErrorException, Util, warn
loadJpegStream, MessageHandler, MissingPDFException, NativeImageDecoding,
PageViewport, PasswordException, StatTimer, stringToBytes,
UnexpectedResponseException, UnknownErrorException, Util, warn
} from '../shared/util';
import {
DOMCanvasFactory, DOMCMapReaderFactory, getDefaultSetting,
@ -104,10 +104,18 @@ if (typeof PDFJSDev !== 'undefined' &&
* @property {string} docBaseUrl - (optional) The base URL of the document,
* used when attempting to recover valid absolute URLs for annotations, and
* outline items, that (incorrectly) only specify relative URLs.
* @property {boolean} disableNativeImageDecoder - (optional) Disable decoding
* @property {boolean} disableNativeImageDecoder - (deprecated) Disable decoding
* of certain (simple) JPEG images in the browser. This is useful for
* environments without DOM image support, such as e.g. Node.js.
* The default value is `false`.
* @property {string} nativeImageDecoderSupport - (optional) Strategy for
* decoding certain (simple) JPEG images in the browser. This is useful for
* environments without DOM image and canvas support, such as e.g. Node.js.
* Valid values are 'decode', 'display' or 'none'; where 'decode' is intended
* for browsers with full image/canvas support, 'display' for environments
* with limited image support through stubs (useful for SVG conversion),
* and 'none' where JPEG images will be decoded entirely by PDF.js.
* The default value is 'decode'.
* @property {Object} CMapReaderFactory - (optional) The factory that will be
* used when reading built-in CMap files. Providing a custom factory is useful
* for environments without `XMLHttpRequest` support, such as e.g. Node.js.
@ -229,10 +237,24 @@ function getDocument(src, pdfDataRangeTransport,
}
params.rangeChunkSize = params.rangeChunkSize || DEFAULT_RANGE_CHUNK_SIZE;
params.disableNativeImageDecoder = params.disableNativeImageDecoder === true;
params.ignoreErrors = params.stopAtErrors !== true;
var CMapReaderFactory = params.CMapReaderFactory || DOMCMapReaderFactory;
if (params.disableNativeImageDecoder !== undefined) {
deprecated('parameter disableNativeImageDecoder, ' +
'use nativeImageDecoderSupport instead');
}
params.nativeImageDecoderSupport = params.nativeImageDecoderSupport ||
(params.disableNativeImageDecoder === true ? NativeImageDecoding.NONE :
NativeImageDecoding.DECODE);
if (params.nativeImageDecoderSupport !== NativeImageDecoding.DECODE &&
params.nativeImageDecoderSupport !== NativeImageDecoding.NONE &&
params.nativeImageDecoderSupport !== NativeImageDecoding.DISPLAY) {
warn('Invalid parameter nativeImageDecoderSupport: ' +
'need a state of enum {NativeImageDecoding}');
params.nativeImageDecoderSupport = NativeImageDecoding.DECODE;
}
if (!worker) {
// Worker was not provided -- creating and owning our own. If message port
// is specified in global settings, using it.
@ -293,7 +315,7 @@ function _fetchDocument(worker, source, pdfDataRangeTransport, docId) {
postMessageTransfers: getDefaultSetting('postMessageTransfers') &&
!isPostMessageTransfersDisabled,
docBaseUrl: source.docBaseUrl,
disableNativeImageDecoder: source.disableNativeImageDecoder,
nativeImageDecoderSupport: source.nativeImageDecoderSupport,
ignoreErrors: source.ignoreErrors,
}).then(function (workerId) {
if (worker.destroyed) {