Change History

The following is a list of changes in each minor release. Note that many of the changes do not apply to all libraries.

3.03.01

Added support for images with 16-bit components.
Rewrote the Dict class to use a hash table; as a side effect, this handles dictionaries with multiple definitions for a key, which are in violation of the spec, but Acrobat appears to handle.
The transformed line width computation -- used to implement the minLineWidth setting, and the hairline threshold in monochrome mode -- was incorrect.
Added fixed pitch mode to XpdfText.
Pdftops was not correctly handling the case where it couldn't find a 16-bit font -- this led to crashes and/or invalid PostScript.
Upgraded to FreeType 2.4.7, which includes a security fix related to Type 1 fonts.
A bug in FlateStream::getBlock() was causing problems with narrow images.

3.03.02

Fixed XpdfPrint to allow changing DC properties (bin, paper size, etc.) between pages when using the print job API (in the COM version) or printToDC (in the DLL).
Added the setPSCustomPageSetup/pdfPrintSetCustomPageSetup function to XpdfPrint.

3.03.03

Use copy-on-write for the clip path in SplashState (when doing gsave), for performance.
Added pdfSetErrorCbk to XpdfViewer DLL; added errorMsg to XpdfPrintCOM and XpdfViewerCtrl.
Generate appearance streams for line annotations.

3.03.04

Get a valid Windows font path on Terminal Server.
Abort processing on a content stream after getting 500 errors (undefined operator, wrong number of args) -- this avoids very long processing time for malicious PDF files using bogus RLE encoded content streams.
Added the psUseCropBoxAsPage xpdfrc option; "pdftops -pagecrop" now sets psUseCropBoxAsPage; "pdftops -pagecrop -paper match" now uses the CropBox as the page size.
Fixed the handling of overprinting/transparency interaction, using the CompatibleOverprint blend mode.
The TIFF predictor code for the 1-bit-per-pixel case was broken.

3.03.05

For triangle and patch mesh shadings (types 4-7) with color functions, interpolate the function parameter not the color.
Implemented the new AES-256 mode (R=6, Acrobat X).
Check the fontFile/fontDir commands before (instead of after) doing Base-14 substitution in PS output.
Correctly handle non-embedded TrueType fonts that have an Identity ToUnicode mapping (display and PS output were failing).
Added a form data extraction API to XpdfText.
Added support for XFA form rendering.
Handle PFB Type 1 fonts when generating PostScript output.

3.03.06

Added the layer order tree API to the libraries.
Handle 16-bit components in JPEG 2000 images.
ActualText spans can end without a valid font, in which case TextPage::beginWord was crashing.
The Domain entry in function shadings wasn't being parsed correctly.
Fixed a bug in the JPEG decoder - successive approximation (progressive mode) coefficients weren't being handled correctly.

3.03.07

Added the printForceImage property to XpdfViewer.
Added support for 128-bit AES encryption to XpdfRMW and XpdfSplice.

3.03.08

When generating PostScript, merge reused TrueType fonts (if their code-to-GID mappings are the same).
Switched to the Visual Studio 2010 compiler.
Tweak the Gouraud triangle shaded fill code to end the recursive splitting if the triangles get sufficiently small.
Optimized the DCT decoder.

3.03.09

Do bilinear interpolation when upsampling images.
Accept strings as well as names for the BaseFont entry in font objects.

3.03.10

Add an object cache.
New text extractor.

3.03.11

[XpdfWidget/Qt only]

Added printing support to XpdfWidget/Qt.
Added highlighted region support to XpdfWidget/Qt.

3.03.12

Added the ability to set print job priority in XpdfPrint.
Added the getPageWidth, getPageHeight, and getPageRotation functions to XpdfSplice.
Fixed a bug in the JBIG2 decoder (the TPGD context for template #3 in readGenericBitmap was incorrect).
Added the pdftohtml tool.
Rewrote the PostScriptFunction code for performance.

3.03.13

Tweaked the new text extractor: shift the grid in line printer mode to avoid floating point accuracy problems.
Removed the TEXTOUT_WORD_LIST config option (this is now always enabled).
Handle 8-bit OpenType CFF fonts that are missing required tables in the OpenType wrapper.
Added IStream output buffering in XpdfPSCOM.

3.03.14

Added support for 64-bit file offsets, i.e., PDF files larger than 2GB.
Added a small cache for object streams.
Modify PSOutputDev to use LZW compression instead of RLE.
Optimize the code that rasterizes pattern-filled image masks.

3.03.15

Use system fonts (.dfont files) on Mac OS X.
Move the Symbol and Zapf Dingbats Type 1 fonts into a separate package (xpdf-t1fonts.tar.gz).
Added the psLZW xpdf setting.
Added the incremental update callback to XpdfRasterizer.

3.03.16

Modified behavior of "pdftops -paper match -duplex ..." - it will now duplex consecutive same-sized pages.
Regenerate appearance streams for PolyLine and Polygon annotations.

3.03.17

Tweak the handling of degenerate fills ('moveto lineto fill') to match Adobe.
Disable scrollbar updates when XpdfViewer's enableRedraw flag is false.
Added PNG output support, including transparency, to XpdfRasterizer.

3.03.18

Don't honor the OPM=1 setting with ICCBased CMYK color spaces.
Whole-word searches were treating certain punctuation (Unicode number separators and terminators) as part of the word, e.g., searching for "foo" would not match "foo,".
Remove non-printable characters from error output, just in case they might cause problems for the terminal program.
Added the region double click event/callback in XpdfViewer.
Removed the unnecessary segment sort in Splash (performance optimization).

3.03.19

Added the pdftopng tool to the Xpdf source packages.
Added a compile-time option (LOAD_FONTS_FROM_MEM) to load fonts from memory rather than temporary files on disk.
Added initial support for Code3of9 bar codes in XFA forms.
Added functions/properties to set the printer bin and paper, and the printer, bin, and paper query functions, to XpdfViewer.
Added the psRasterSliceSize xpdfrc option.
Fixed a case in the JPEG 2000 arithmetic decoder where extra data is present in packet i, and needs to be saved for use in packet i+1.

3.03.20

Added the "enableXFA" xpdfrc setting.
Handle the case in PSOutputDev where slice size overflows a 32-bit integer.
Fixed a bug in the JPEG 2000 decoder related to images with fewer than 8 bits per component.
Tweaked a parameter to improve text extraction results in table mode -- it should now split between all words.

3.03.21

Add (partial) support for TrueType cmap format 2.
Always pass FT_LOAD_NO_BITMAP to FreeType -- bitmaps apparently fail with rotated characters.
Added the getInfoString/pdfGetInfoString function to XpdfViewer (OCX and DLL).

3.03.22

Added the mapExtTrueTypeFontsViaUnicode xpdfrc command.
Build without /GL and /LTCG on Windows, so that the static libraries can be used with different versions of the MS compilers.
In DeviceN output mode, if a DeviceN color space has two (or more) channels with the same name, add the color components.
Support fonts specified in ExtGState dictionaries.
New trapezoid-based rasterizer core (for performance).
Apply stroke adjustment to rectangular images and clipping regions (in addition to strokes and fills).

3.03.23

Various bug fixes for the new trapezoid-based rasterizer.
Annotations with empty Border arrays should not draw a border.
Fix the CMap parser to handle large CID ranges.
Added the componentVersion property to all COM/OCX components.
Added the getPDFVersion function/property to XpdfInfo and XpdfViewer.

3.03.24

Added color management support to XpdfDevN and XpdfRasterizer.
Upgraded to FreeType 2.5.0.1.
Device{Gray,RGB,CMYK} cannot be mapped via a resource dict.

3.03.25

Decode JPEG 2000 images at less than full resolution if the full res image isn't needed (i.e., if the raw image is higher resolution than the output).
Changed the PS output for masked images (explicit and color key masking): use a plain old clip path instead of rectclip to avoid array overflows.
Check the StemSnapH/V arrays when converting Type 1C fonts to Type 1 - if there are any duplicate or out-of-order values, skip that StemSnapH/V array.
Added the psMinLineWidth xpdfrc setting.
Fix an obscure issue in converting TrueType fonts to Type 42, related to empty glyph descriptions (12 zero bytes).
Check for the Sharp PS driver, and disable PostScript generation (because the Sharp driver wraps each page in a save/restore pair, which effectively deletes the Xpdf prolog code after the first page).
Added DeviceN rasterization (convertPageToDeviceNImage, etc.) to XpdfRasterizer (DLL & COM).

3.03.26

Fix vertical text (CJK fonts) in PS output -- offset the character origin correctly.
Handle right-to-left (e.g., Arabic) ligatures correctly in the text extractor.
Implemented knockout groups.
Handle Lab profiles in ICCBased color spaces.
Do color management when building the GfxColorChannel.toCMYK arrays (and when converting CMYK to RGB in "pdftoppm -devnRGB").

3.03.27

Modifications to the text extractor - overlapping lines were being merged in certain cases; better support for drop caps; support for inverted paragraph indents.
Added the -loc and -locPS options to pdffonts.
Extend the object parser recursion limit to cover Stream::addFilters() / Stream::makeFilters() - to avoid another possibility of stack overflow.
Disable FreeType autohinting, because it can fail badly with font subsets that use invalid glyph names -- except in the case of Type 1 fonts, which look much better with light autohinting.
Modified the rasterizer pipeline functions to process a scan line at a time (for performance).

3.03.28

The LZW encoder (used for PostScript output) now starts all streams with a clear-table code (for compatibility with some printers).
Touch scrolling (for Windows 8) wasn't working -- the SB_THUMBPOSITION request for WM_HSCROLL/WM_VSCROLL events wasn't implemented.
The LZW encoder was producing incorrect output when generating a clear-table code and end-of-data code in the same step.
Tested XpdfWidget with Qt 5.2.1. Updated the .pro files.

3.03.29

When upsampling an image mask or image with a large resulting image size, do it in stream mode instead of prescaling the whole image (to avoid running out of memory).
XpdfSplice now de-dupes streams.

3.03.30

Added the extractTextFromRect2, getWordBox2, and getWordCharBox2 functions to XpdfText.

3.04

3.04.01

Limit transparency groups to the clip rectangle (performance optimization).
Optimized the SplashScreen code, used in 1-bit monochrome mode.
Regenerate the appearance stream for an AcroForm field if there is no appearance stream, even if NeedAppearances isn't set.
When regenerating AcroForm field appearance streams, use a default font (Helvetica) for fields that don't have a valid font.
Added the setWatermark function to XpdfSplice.
When the line width is increased by the minLineWidth setting, force the line join mode to "bevel" to avoid "whiskers" at sharp corners.
Added the media type setting in XpdfPrint.

3.04.02

Improved the object de-duplication code in XpdfSplice.

3.04.03

[beta release for XpdfWidget/Qt and XpdfViewer only]

Multithreaded rasterization in the viewer - pages are now rasterized in a separate thread so that scrolling and other UI activity is not blocked.
Added support for side-by-side single, side-by-side continuous, and horizontal continuous display modes; added the setDisplayMode/getDisplay functions to XpdfViewer and XpdfWidget.
Added the zoomHeight option to XpdfViewer and XpdfWidget.
Added the getThumbnail function to XpdfWidget.

3.04.04

Improvements and bug fixes for multithreaded rasterization.
Added support for preblended soft-masked images.
Added optional support for using libjpeg to decode DCT (JPEG) streams.
Switched to a different IDCT transform in the DCT (JPEG) decoder, to get better accuracy; the new transform is also a bit faster.

3.04.05

Various bug fixes.

3.04.06

Modified the polygon scan converter to avoid O(n^2) performance, which can get really bad with paths that have extremely large numbers of segments.

3.04.07

Fixed COM API handles to work correctly on 64-bit systems.
Added the convertRegionToDeviceNImage function to XpdfRasterizer.
Added the maxTileWidth, maxTileHeight, tileCacheSize, and workerThreads xpdfrc settings.

3.04.08

Modified PSOutputDev so it doesn't output resources (fonts, etc.) for pages that are rasterized (because they use transparency).
Handle TrueType fonts with out-of-bounds loca entries.
Optimize consectutive "q" (gsave) operations in PostScript output.
Fixed a security hole with the use of d0/d1 operators outside of a Type3 CharProc [CVE-2016-9027].

3.04.09

Improvements to the XFA rendering code.
Various minor bug fixes.
Added the -nodiag flag to pdftotext.
Switched to cmake instead of autoconf.

3.04.10

Added the pdfSetDiscardDiagonalText function to XpdfText and XpdfViewer.
Look for Widget-type annotations that aren't attached to the AcroForm, and add them to the AcroForm.
Added a mouseWheel signal to XpdfWidget.

3.04.11

Added the "-z" option to pdftohtml.
Improved the handling of drop caps in pdftohtml.
Added the "psNeverRasterize" setting.
Pdftohtml and XpdfHTML now convert invisible PDF text to transparent HTML text.
Added the checkPageTransparencyUsage function to XpdfRasterizer.

3.04.12

Check for zero-width/height bitmaps in the JBIG2 decoder -- these can happen in corrupted JBIG2 streams.
Added CCITTFaxStream::getBlock() to speed up the CCITTFax decoder.
Added XpdfWidget::setSelectionColor().
Added resolution info to PNG files generated by pdftopng and XpdfRasterizer.
XpdfWidget automatically reloads a changed PDF file.
Added the DevNToRGB mode to XpdfRasterizer.
Added the getNumColorSpaces, getColorSpaceName, and getNumColorSpaceObjects functions to XpdfRasterizer.
Added compressed TIFF output to XpdfRasterizer.
Added the printerSupportsCollation function to XpdfPrint.
Added the "emulated multi copy" printing mode to XpdfPrint and XpdfViewer.
Beta release of PDFtoSVG.

3.04.13

Regenerate appearance streams for FreeText annotations.
Fixed bugs in emulated multi-copy printing mode: incorrect page numbers in print status callback; crashes when using collate=false.
Improvements to the XFA rendering code.
Added the XpdfWidget::reload() function.

3.04.14

Added the getPaperSize function to XpdfPrint.
XpdfRasterizer wasn't setting the resolution units field in JPEG files.
Added embedded file access functions to XpdfWidget.
Added the customPaperWidth/Height properties to XpdfPrint.
Added the simple one-column text extraction mode (pdftotext -simple).

3.04.15

Added a -cmyk option to pdftoppm to write CMYK PAM files.
Modified pdfinfo to output "static XFA" or "dynamic XFA", rather than just "XFA".
Added the "spaceAfter" and "pos" attributes to the element in PDFdeconstruct output.
Added image masks to the PDFdeconstruct output.
PDFdeconstruct now drops any characters with Unicode indexes less than 0x20 (which are not allowed in XML).
Added the "font", "fontSize", and attrs/elements to elements in PDFdeconstruct output.
Added the "-nofields" switch to PDFdeconstruct.

3.04.16

Added the setRegionLabel function to XpdfViewer.
Performance optimizations in the rasterizer.
Fixed the tiling pattern code to avoid stripes between pattern cells, and to honor the TilingType flag.
Added Unicode (wide string) versions of pdfGetPrinterName, etc. to the XpdfPrint DLL.

3.04.17

Always split axial shadings into 256 slices.
When printing to certain printers from a 32-bit process on a 64-bit version of Windows, disable raw mode.
Fixed a security hole in SecurityHandler.cc (uninitialized variables). This vulnerability was discovered by Kushal Shah of Fortinet's FortiGuard Labs.

3.04.18

Added the readDoc/loadDoc/freeDoc functions to XpdfWidget.
Handle the case where an optional content block is left open at the end of a page content stream.
Accept code-to-CID-type CMaps as ToUnicode CMaps (to work around buggy PDF generators).
Added an XpdfViewer/XpdfWidget function to make regions non-resizable.
Optimized the DCT (JPEG) decoder and the image upscaling code.
The text extractor now reverses the order of side-by-side columns for right-to-left scripts.
Added the document outline (bookmarks) to the PDFdeconstruct output (with the "-outline" switch).
Implemented proper gamma correction in the rasterizer. Added the rasterizerGamma xpdfrc setting.

3.04.19

Added the print job API to the DLL version of XpdfPrint.
Switched the default display mode to continuous (from single page). This affects XpdfViewer and XpdfWidget.

3.04.20

Added the "-bom" switch to pdftotext.
Added the GrayToMono mode to XpdfRasterizer.
Added XpdfViewer mouse events/callbacks that receive window coordinates.
Added the getPrimaryDirection and getWordDirection functions to XpdfText.
Added the "-table" switch to pdfdeconstruct, and pdfDeconstructSetReaderingOrderMode/SetTableMode to XpdfDeconstruct.

3.04.21

Added the getWindowPageRange function to XpdfViewer.
Added touch pan/zoom support to XpdfViewer.
Added the discardInvisible and discardClipped settings to PDFdeconstruct/XpdfDeconstruct.

3.04.22

Added the setPhysicalLayoutTextMode and setTableLayoutTextMode functions to XpdfViewer.
Removed the gamma correction code -- it was causing more problems than it was solving.
The transfer function goes before alpha blending in the rasterizer pipeline.
Added the setViewerPreferenceName function to XpdfSplice.
Added the pdfSetHTMLAllTextInvisible function to XpdfHTML; added the "-allinvisible" switch to pdftohtml.

3.04.23

Added a linear text selection mode. New XpdfViewer and XpdfWidget functions: setLinearSelectMode, setBlockSelectMode, getSelectedText, clearSelection.
Added overprint mode (OPM) support in Level 3 PostScript output.
Added support for DeviceN color spaces in Level 3 PostScript output.
Added the getInfoString function to XpdfPrint.
Added the "-userunit" option to pdftops; added the honorUserUnit property to XpdfPS.
Added the pdfSetHTMLZoom function to XpdfHTML.
Fixed a security hole in Function.cc (write past end of array).

3.04.24

Added support for ICCBased color spaces in Level 3 PostScript output.
Extended the PostScript DeviceN support to use the DeviceN Colorants attribute.
Added grayscale PostScript output -- added the '-level2gray' and '-level3gray' switches to pdftops; added the level2Gray and level3Gray constants/properties to XpdfPS.
Added the getPageUserUnit function to the libraries and COM components.
Fix up Type 1 fonts when embedding in PostScript.

3.04.25

Added the onAnnot, getAnnotType, and getAnnotContent functions to XpdfViewer and XpdfWidget.
Added the "problematic" column to pdffonts output.
Generate an appearance stream for signature fields in AcroForms.
Added the "addPageRotatedCropped" function to XpdfSplice.

3.04.26

Added the "strokeAdjust cad" xpdfrc option.
Added support for Code128B bar codes in XFA forms.
Added form field access functions (onFormField, etc.) to XpdfWidget.
Added the clearWin32ErrorInfo, getWin32ErrorFunc, and getWin32ErrorCode functions to XpdfPrint.

3.04.27

Color management improvements: - use the DestOutputProfile as the default output profile - CMYK passthrough if input profile = output profile - honor OPM with CMYK passthrough - support rendering intent - allow the rgbOutputProfile and defaultRGBInputProfile to be set to an internal sRGB profile - enable LCMS's black point compensation
Added the discardClippedText property to XpdfText.
Added linearization support to XpdfRMW.

3.04.28

Added the FormFiller module to XpdfRMW to fill out AcroForms.
Optimization work on the rasterizer.

3.04.29

Fixed a bug in 3.04.28 related to axial gradient shadings.

3.04.30

Added support for XFA 'numericEdit' fields.
XpdfViewer wasn't destroying its rasterization worker threads when the control was destroyed.
Added the getPageUserUnit function to XpdfSplice.
Added support for 'picture' formatting in XFA forms.
Tweaked the transparency blending functions to match Acrobat's behavior in DeviceN mode.
Handle transparent text (alpha=0) the same way as invisible (render mode=3) text.
Added a discardInvisibleText function/propert to XpdfText.

3.04.31

Added the owner property / pdfPrintSetOwner function to XpdfPrint.
Look for unattached Widget-type annotations even if there is no AcroForm dictionary.
Added the printOtherFileToJob function to the XpdfPrint COM component.
Do overprint simulation in DeviceN-to-RGB conversion by multiplying in XYZ space.

3.04.32

defaultRGBInputProfile now defaults to sRGB.
Performance improvements for axial and radial shadings.
Use the PDF 2.0 inline image length field.
Added the printerSupportsPostScript function to XpdfPrint.
Added the printBlankPageToJob and printJobPageCount functions to XpdfPrint.
Handle duplicate embedded Type 1 font names in PostScript output.
Added the sortFormFields function to XpdfText.

3.04.33

Various small fixes based on the PDF 2.0 spec.
In DeviceN rasterization mode, when there are more than 32 color channels, Separation and DeviceN color spaces that use out-of-bounds channels now fall back to their alternate color spaces. Alternately, if the dropExtraDeviceNChannels xpdfrc setting is true, those channels will be dropped, which is useful for rendering a subset of the channels.
PSOutputDev now converts tiling patterns to PostScript tiling patterns (in Level 2/3).

4.00

4.00.01

Fix a build issue: XpdfReader was being build without printing support.

4.00.02

Tweaked the TrueType encoding/cmap code again, to get closer to the PDF 2.0 spec, and to fix a problem (difference between Xpdf and Adobe) with a specific PDF file.
Optimized transparency group rasterization: only composite the part of the group bitmap that was modified.

4.00.03

Minor bug fixes only.

4.00.04

If vector antialiasing is disabled, use the narrow stroke code for lines less than one pixel wide.
Added the openInputStream and openInputStreamWithPassword functions to the XpdfSplice COM component.

4.00.05

Do not map through Unicode for non-embedded CID TrueType fonts with encoding = Identity-H and char collection = Adobe-Identity -- this matches Adobe's behavior on a somewhat common case.
Added the mouseCursor2 and mouseLinkCursor2 properties to the XpdfViewer control.
The CCITTFax decoder now aborts after 1000 error messages, avoiding problems with huge data expansion for badly corrupted CCITTFax streams.

4.00.06

Added the buildWordListFromRect2 function to XpdfText.
Modified the XpdfRasterizer checkPageColorUsage function to treat CMYK 0,0,0,0 and 0,0,0,1 as mono, and CMYK 0,0,0,x as gray.
Added hyperlink support to Xpdf/QtQuick.
Added pinch-zoom support to Xpdf/QtQuick.

4.00.07

Added the "-splitchars" switch to PDFtoSVG.
Pdftohtml wasn't setting the background image width/height attributes correctly for rotated pages.
Added basic transparency support to PDFtoSVG.
Ignore color-setting operators in cached Type 3 characters.
Added the paperMatch setting to XpdfPrint.
Support color-key masking in Level3Gray PS output with preload.
Added the unicodeRemapping xpdfrc option.
Added the getPageCount function to XpdfPrint.
Added the startPaused property to XpdfPrint.
The xref loop detection code was only looking at xref tables, and not xref streams. (CVE-2018-7174) [Thanks to skysider for the bug report.]
The JPX decoder wasn't checking to make sure the number of components is non-zero. (CVE-2018-7175) [Thanks to skysider for the bug report.]
Check for uninitialized value in JPXStream::fillReadBuf. (CVE-2018-7452) [Thanks to skysider for the bug report.]
Don't try to load an XFAForm if the PDF file has zero pages. (CVE-2018-7454) [Thanks to skysider for the bug report.]

4.00.08

Change the cursor when the mouse is over text (in linear selection mode).
Support external OpenType CFF fonts for PostScript output.
Handle choice-type AcroForm fields that have separate display values and export values.

4.00.09

Increased the supported PDF version from 1.7 to 2.0. (This isn't a change in functionality. The code was already in place -- I just forgot to bump the PDF version number.)
Handle transfer functions correctly in DeviceN mode.
Added the dropFont xpdfrc option.
Added support for PDF417 barcodes in XFA forms.
Modified pdfinfo to look at both the Info dict and the XML metadata.
Added pdfConvertPageToBitmap3 and pdfConvertRegionToBitmap3 functions to XpdfRasterizer, which take separate arguments for horizontal and vertical resolution.
Don't look at the "DV" (default value) key in AcroForm fields -- that should only be used when a form is explicitly reset.
Check for invalid line cap/join values. (CVE-2018-16368) [Thanks to fish@360TeamSeri0us for the bug report.]

4.00.10

Added the "-textops" option to PDFdeconstruct.
Accept 8-byte values in xref streams.
Support large bitmaps (>4GB) on 64-bit systems.
Added the checkPageColorUsage function to XpdfPS.
Added gotoPage, gotoNextPage, and gotoPreviousPage functions to Xpdf/QtQuick.
If the page count is greater than 50k, rescan the page tree and count the pages. This prevents long load times where various tools try to read pages 1 through n. (CVE-2018-18651) [Thanks to krace for the bug report.]
Two DCTStream bugs: don't allow SOF headers between progressive scans; check for invalid Huffman table indexes. [Thanks to fish@360TeamSeri0us for the bug reports.]
Check for uses of the scn/SCN operators with no arguments. [Thanks to fish@360TeamSeri0us for the bug report.]
Correctly handle indexed color spaces with empty lookup tables. [Thanks to fish@360TeamSeri0us for the bug report.]

4.00.11

XpdfWidget wasn't handling mouse events correctly with scaled HighDPI displays.
Added outline support to Xpdf/QtQuick.
Added the getNumPages function to Xpdf/QtQuick.
Added the xpdfSpliceOpenOutputMem and xpdfSpliceCloseOutputMem functions to the XpdfSplice library.
Look for OpenType .otf files (in addition to TrueType files) when scanning Windows system fonts.
XpdfPrint wasn't honoring the jobPriority, owner, and startPaused settings when using the print job API.
Added a sanity check for JBIG2 symbol height. (CVE-2018-7173) [Thanks to skysider for the bug report.]

4.01

Handle a null font name in PSOutputDev::setupEmbeddedType1Font. [Thanks to r4xis for the bug report.]
Check for invalid quant table indexes in the DCT decoder. [Thanks to r4xis for the bug report.]

4.01.01

The PDFDoc(BaseStream) initializer wasn't working correctly.
Added the scrollToCentered, hasSelection, and getCurrentSelection{Page,X0,Y0,X1,Y1} functions to Xpdf/QtQuick.
Fixed a missing array bounds check in PSOutputDev. [Thanks to Loginsoft for the bug report.]
If the "U" string used for RC4 decryption is short, Adobe apparently zero-pads it, so Xpdf now does the same.
Fixed a problem parsing large real numbers. [Thanks to Loginsoft for the bug report.]

4.01.02

Properly handle overprint in non-isolated transparency groups.
The DCT decoder doesn't handle a sampling factor of 3 -- check for this and report an error. [Thanks for Agostino Sarubbo of Gentoo for the bug report.)
Check for images with a Pattern color space, and report an error. [Thanks to TeamSeri0us for the bug report.]
Check that the Width, Height, and BitsPerComponent are valid in image soft masks. [Thanks to TeamSeri0us for the bug report.]
Check for zero page width/height in PSOutputDev. [Thanks to TeamSeri0us for the bug report.]
Check for divide-by-zero in PostScript functions. [Thanks to TeamSeri0us for the bug report.]

4.01.03

Properly handle overprint in shading pattern strokes.
PostScript doesn't support progressive or non-interleaved DCT (JPEG) streams, so check for those and re-encode them in PS output.
Added the loadFile and loadFileWithPassword functions to Xpdf/QtQuick.
Splash now caches the most recent scaled image, in case it is immediately reused -- this results in a significant speedup in certain cases.

4.01.04

Added the simpleLayoutMode setting to XpdfText.
Added touch pan/zoom support to XpdfWidget; added the enableTouchPan and enableTouchZoom functions.
Pdftohtml now extracts embedded fonts (TrueType and CFF only).
Added the notifyName setting to XpdfPrint.
Mark XpdfSplice's file handles as non-inheritable on Windows.
Added the reverseVideoInvertImages setting.
Fixed several bugs uncovered by fuzz testing. [Thanks to Pangu Lab and TeamSeri0us for the bug reports.]

4.02

Added the getViewerPreference function to XpdfPrint.

4.02.01

Added a sanity check for JBIG2 symbol width. [Reported by Marc Schoenefeld.]

4.02.02

Redesigned the image scaling code, for performance.
Cleaned up the code that sanity-checks font sizes to avoid trying to allocate too much memory for the font cache.

4.02.03

Implemented precincts in the JPEG 2000 decoder.
Added functions to XpdfRasterizer with separate horizontal and vertical resolution arguments.
Added support to XpdfDeconstruct for Unicode file names on Windows.
Added the getImageBitsPerComponent function to XpdfImageExtract.

4.02.04

Reorganized the gradient shading rasterization code to avoid transparency artifacts between triangles/patches.
Added the "simple2" mode to pdftotext and XpdfText.
Rewrote the code that draws static XFA forms: combined it with the AcroForm code, to match Adobe's behavior. Removed the enableXFA xpdfrc setting.
Added the getDeviceNToRGBPicture and removeDeviceNChannel functions to XpdfRasterizer.

4.02.05

4.02.06

4.02.07

Doing overprint preview in tiling patterns requires tracking the overprint mask at each pixel.
Added the 'problematicForUnicode' attribute to elements in the PDFdeconstruct output.
Use interpolation rather than subdivision to rasterize Gouraud triangle shadings.
Check for "decompression bombs" in Flate and LZW streams.
Added XpdfWidget::findAll().
Added the XpdfWidget::mouseClick, mouseDoubleClick, and mouseTripleClick signals. Implemented extended selection on shift-click, and word/line selection on double/triple-click.
Added to Xpdf/QtQuick: the XpdfRect type and the getCurrentSelection, setCurrentSelection, clearSelection, and findAll functions.
Added the rotation setting to XpdfRasterizer.
Added the getFormType2 function to the libraries and COM components.

4.02.08

Added the enableExternalHyperlinks setting to XpdfWidget and XpdfViewer.
Added the hasPageLabels, getPageLabelFromPageNum, and getPageNumFromPageLabel functions to XpdfWidget and XpdfViewer.
Added the pdfGetMidPageNum function / midPage proerty to XpdfViewer.
Added support for @"..." strings in xpdfrc files. This includes using '%' as an escape character, and also the '${DATADIR}' variable.
Added the getWordSpaceAfter function to XpdfText.

4.03

Modified pdftohtml to draw 'invisible' text over non-horizontal words.

4.03.01

Changed pdftohtml to generate spans with 'class=' instead of 'id=', so there aren't duplicate ids.
Added the fileIsDamaged function/property to the libraries.
Added the '-output' option to PDFdeconstruct.
Added the '-nopatterns' option to PDFdeconstruct.
Added the convert{Page,Region}ToDeviceNImage and getDeviceNAlphaPicture functions to XpdfRasterizer.

4.03.02

Added the useTrueTypeUnicodeMapping xpdfrc setting.
Added a font vectorization option to PDFtoSVG.
Improved handling of RTL text in the text extractor and in PDFdeconstruct.

4.03.03

Added the enableDeviceNOverprintPreview and enableColorManagement functions to XpdfViewer.
Added support for DeviceN-to-RGB and gray-to-mono output modes to the XpdfViewer image conversion functions.
Added support for Qt6.

4.03.04

Added the pdfGetFileNameW function to XpdfViewer.
Added the paperOrientation property to XpdfPrint.
Added the resetDeviceNChannelMask and setDeviceNChannelMask functions to XpdfRasterizer.

4.03.05

Fixed an integer overflow security hole in the JBIG2 decoder.

4.03.06

Added the getCustomColorCMYK function to XpdfAnalyze.
Added the 'trasparent' argument to the XpdfWidget convertPageToImage and convertRegionToImage functions.
Added the convertPageToBitmap2, convertRegionToBitmap2, getDeviceNBitmap, getDeviceNAlphaBitmap, and getDeviceNToRGBBitmap functions to XpdfRasterizerCOM. These return raw bitmaps, rather than OLE IPicture objects.
XpdfHTML now generates HTML links for URI links anchored on text.
XpdfRasterizer now resets the DeviceN channel mask on every call to convertPageToDeviceNImage, convertPageToDeviceNImageWithAlpha, convertRegionToDeviceNImage, or convertRegionToDeviceNImageWithAlpha.
Added the getDeviceNChannelMask function to XpdfRasterizer.

4.04

4.04.01

Implemented pattern stroking of text. Also fixed the various combinations of filling/stroking with color/pattern + clipping, some of which weren't being handled correctly. This involved modifying the OutputDev interface.
Added the OutputDev::fillStroke() method. This is useful for anything that can fill and stroke with a single operation (e.g., SVG), and can be ignored by everyone else.

4.04.02

PostScript output now (re)compresses any uncompressed or RLE-compressed images.

4.04.03

4.04.04

Added the copyOptionalContentSetup function to XpdfSplice.
Added the region API to XpdfWidget/QML.
Added the highlighted region functions to the XpdfWidget QtQuick/QML API.
Implemented asynchronous find-all, where a find-all operation runs in a separate thread. For now, this is only available in the XpdfWidget QtQuick/QML API.
Added structure tree support to PDFdeconstruct.

4.04.05

Added the getFormFieldBBox and getFormFieldMaxLength functions to XpdfText.

4.04.06

Added the ability to embed ICC profiles in images generated by XpdfRasterizer -- see the pdfSetEmbedOutputProfile function.
Ignore overprint in soft masks (to match Adobe's behavior).
Added the primaryRot attribute to the page element in the pdfdeconstruct output.
Added the enableColorManagement and set{Gray,RGB,CMYK}Profile functions to XpdfRasterizer.
Added CMYK and DevNToCMYK support to the in-memory bitmap functions in XpdfRasterizer.
Added the getNumVisibleChars, getNumInvisibleChars, and getNumRemovedDupChars functions to XpdfText and XpdfHTML.