| commit | 15f1a88dece664ae7300d9a60fe124cec1f2b9de | [log] [tgz] |
|---|---|---|
| author | Ryan Harrison <rharrison@chromium.org> | Wed Aug 22 20:50:14 2018 +0000 |
| committer | Chromium commit bot <commit-bot@chromium.org> | Wed Aug 22 20:50:14 2018 +0000 |
| tree | a13d363deadc618c919ba6cbf2b7982511a7db7c | |
| parent | 7e7e0b8379c4bdcf3e16cd2298afe49f03fefdfb [diff] |
Properly handle language markers in decoded text In text like document title 0x001B is used as a marker for the beginning/end of a language metadata section. Currently PDFium does nothing with this data, but when returning the 'decoded' text it needs to be stripped out. The existing code assumed that the two bytes following a marker would be the data to be removed and did nothing to track if it was in/out of one of these regions. This led to a situation where it would always strip the two bytes following the region, since it assumed the end marker was the beginning of a new region. This CL corrects the detection and handling of these regions, and adds a regression test for the reported bug. BUG=pdfium:182 Change-Id: I92ddba5666274a8986fed03f502a0331f150f7ac Reviewed-on: https://pdfium-review.googlesource.com/41070 Reviewed-by: Henrique Nakashima <hnakashima@chromium.org> Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Get the chromium depot tools via the instructions at http://www.chromium.org/developers/how-tos/install-depot-tools (this provides the gclient utility needed below).
Also install Python, Subversion, and Git and make sure they're in your path.
PDFium uses the same build tool as Chromium:
Please refer to Chromium's Visual Studio set up for requirements and instructions on build environment configuration.
Run set DEPOT_TOOLS_WIN_TOOLCHAIN=0, or set that variable in your global environment.
Compilation is done through ninja, not Visual Studio.
The default architecture for Windows, Linux, and Mac is “x64”. On Windows, “x86” is also supported. GN parameter “target_cpu = "x86"” can be used to override the default value. If you specify Android build, the default CPU architecture will be “arm”.
It is expected that there are still some places lurking in the code which will not function properly on big-endian architectures. Bugs and/or patches are welcome, however providing this support is not a priority at this time.
Run: download_from_google_storage --config and follow the authentication instructions. Note that you must authenticate with your @google.com credentials. Enter “0” if asked for a project-id.
Once you've done this, the toolchain will be installed automatically for you in the Generate the build files step below.
The toolchain will be in depot_tools\win_toolchain\vs_files\<hash>, and windbg can be found in depot_tools\win_toolchain\vs_files\<hash>\win_sdk\Debuggers.
If you want the IDE for debugging and editing, you will need to install it separately, but this is optional and not needed for building PDFium.
The name of the top-level directory does not matter. In our examples, we use “repo”. This directory must not have been used before by gclient config as each directory can only house a single gclient configuration.
mkdir repo cd repo gclient config --unmanaged https://pdfium.googlesource.com/pdfium.git gclient sync cd pdfium
Additional build dependencies need to be installed by running:
./build/install-build-deps.sh
We use GN to generate the build files and Ninja to execute the build files. Both of these are included with the depot_tools checkout.
PDFium may be built either with or without JavaScript support, and with or without XFA forms support. Both of these features are enabled by default. Also note that the XFA feature requires JavaScript.
Configuration is done by executing gn args <directory> to configure the build. This will launch an editor in which you can set the following arguments. A typical <directory> name is out/Debug.
use_goma = true # Googlers only. Make sure goma is installed and running first. is_debug = true # Enable debugging features. pdf_use_skia = false # Set true to enable experimental skia backend. pdf_use_skia_paths = false # Set true to enable experimental skia backend (paths only). pdf_enable_xfa = true # Set false to remove XFA support (implies JS support). pdf_enable_v8 = true # Set false to remove Javascript support. pdf_is_standalone = true # Set for a non-embedded build. is_component_build = false # Disable component build (must be false) clang_use_chrome_plugins = false # Currently must be false.
Note, you must set pdf_is_standalone = true if you want the sample applications like pdfium_test to build.
When complete the arguments will be stored in <directory>/args.gn, and GN will automatically use the new arguments to generate build files. Should your files fail to generate, please double-check that you have set use_sysroot as indicated above.
You can build the sample program by running: ninja -C <directory> pdfium_test You can build the entire product (which includes a few unit tests) by running: ninja -C <directory> pdfium_all.
The pdfium_test program supports reading, parsing, and rasterizing the pages of a .pdf file to .ppm or .png output image files (windows supports two other formats). For example: <directory>/pdfium_test --ppm path/to/myfile.pdf. Note that this will write output images to path/to/myfile.pdf.<n>.ppm.
There are currently several test suites that can be run:
It is possible the tests in the testing directory can fail due to font differences on the various platforms. These tests are reliable on the bots. If you see failures, it can be a good idea to run the tests on the tip-of-tree checkout to see if the same failures appear.
Code coverage reports for PDFium can be generated in Linux development environments. Details can be found here.
Valgrind and other profiling tools do not work correctly with the standard build setup that PDFium uses. You will need to add ro_segment_workaround_for_valgrind=true to args.gn to get symbols to correctly appear.
The current health of the source tree can be found at https://ci.chromium.org/p/pdfium/g/main/console
There are several mailing lists that are setup:
Note, the Reviews and Bugs lists are typically read-only.
We use this bug tracker, but for security bugs, please use [Chromium's security bug template] (https://code.google.com/p/chromium/issues/entry?template=Security%20Bug) and add the “Cr-Internals-Plugins-PDF” label.
For contributing code, we will follow Chromium's process as much as possible. The main exceptions are: