<AWT Dev> RFR [9] Modular Source Code

Anthony Petrov anthony.petrov at oracle.com
Thu Aug 28 18:38:07 UTC 2014


best regards,

On 8/28/2014 1:00 PM, Magnus Ihse Bursie wrote:
> On 2014-08-27 12:57, Anthony Petrov wrote:
>> Hi Magnus,
>> Those look like reasonable suggestions. Could you please file separate
>> bugs for each of these issues? Also, please note that most of them
>> belong to 2D, not AWT (e.g. the font-, color-, d3d-, and
>> opengl-related files) even though they're compiled into the awt native
>> libraries.
> I created JDK-8056209, JDK-8056210, JDK-8056212, JDK-8056213,
> JDK-8056214, JDK-8056215, JDK-8056216 and JDK-8056217 for these. After
> some consideration, I choose to put them on the infrastructure/build
> category, since I believe the build part (changes to the makefiles)
> requires most of the work (compared to e.g. removing a file), and that
> we are probably more keen on having them solved :), but they need to be
> resolved in cooperation with the 2D team.
> The issue regarding the medialib directories was already reported in
> JDK-8055190.
> /Magnus
>> --
>> best regards,
>> Anthony
>> On 8/25/2014 1:14 PM, Magnus Ihse Bursie wrote:
>>> On 2014-08-20 11:14, Magnus Ihse Bursie wrote:
>>>> On 2014-08-18 16:15, Anthony Petrov wrote:
>>>>> So I'm not sure if the current set of AWT libraries could be
>>>>> simplified any further.
>>>>> Hope this helps.
>>>> Thank you for the clarification, it was very helpful!
>>>> While the set of AWT libraries probably cannot be simplified as you
>>>> say, my gut feeling is still that the current layout of files on disk
>>>> does not optimally match the actual libraries we build. Armed with the
>>>> help of your description, I'll look into them once again and see if I
>>>> can make that statement more concrete.
>>> This is my suggestions based on what I found when trying to remove the
>>> last unnecessary entanglement. Note that all paths are relative to the
>>> java.desktop module, and  that I have at this stage only looked at
>>> compiled sources (*.c), not header files.
>>> * The following files are in the windows directory tree, but are
>>> explicitly excluded on Windows. Thus they will never be built, and
>>> should be removed instead:
>>>    ./windows/native/libawt/sun/java2d/d3d/D3DPipeline.cpp
>>>    ./windows/native/libawt/sun/java2d/d3d/D3DShaderGen.c
>>>    ./windows/native/libawt/sun/windows/WBufferStrategy.cpp
>>> * The following file is in the share directory tree, but is only used on
>>> Windows. It should be moved to the corresponding windows directory
>>> instead:
>>>    ./share/native/libawt/sun/java2d/ShaderList.c
>>> * The following directory is in the unix directory tree, but is only
>>> used on Solaris. It should be moved to the corresponding solaris
>>> directory instead:
>>>    ./unix/native/libawt/sun/java2d/loops
>>> * The directory ./unix/native/common/sun/awt contains five more or less
>>> unrelated .c files. Three of them are only used in libawt_xawt, and
>>> should be moved there:
>>>    ./unix/native/common/sun/awt/awt_Font.c
>>>    ./unix/native/common/sun/awt/fontpath.c
>>>    ./unix/native/common/sun/awt/X11Color.c
>>> Of the remaining two CUPSfuncs.c seems correctly placed, since it is
>>> shared between libawt_xawt and libawt_lwawt. However, I'm wondering
>>> about initIDs.c. It is compiled in libawt as well as libawt_xawt, but
>>> when I checked some random functions, they are exported (via the
>>> mapfile) for libawt only. So I believe it is a mistake to include it in
>>> libawt_xawt, and that it should be moved to the libawt directory. This
>>> will need verification from someone on the AWT team.
>>> * The directory ./unix/native/libjawt is included in libawt_xawt (and in
>>> libjawt, of course). This seems suspicious to me. There is just a single
>>> file with a single function, JAWT_GetAWT(), which is exported in libjawt
>>> (via a mapfile), but not in libawt_xawt. I believe it is a mistake to
>>> include it in libawt_xawt. This will need verification from someone on
>>> the AWT team.
>>> * All of the awt-related directories (libawt_* and common) include an
>>> unnecessary extra layer, the "sun" directory. It is not needed anymore,
>>> and just makes all paths extra long. I suggest that we remove that layer
>>> and move everything up one step.
>>> * The makefiles include too specific directories. Instead of including
>>> e.g. ./*/native/common/sun/java2d/opengl and
>>> ./*/native/common/sun/java2d/x11, we should just include
>>> ./*/native/common/sun/java2d. This level corresponds to a logical
>>> grouping of the source code, and not the directory structure in that
>>> grouping.
>>> * The file ./windows/native/common/awt_makecube.cpp is a bit strange. It
>>> is not a shared file; instead it's a stand-alone binary with a main()
>>> function. It is not compiled by any makefile targets. If this file is
>>> actually used, I suggest moving it to a better location
>>> (windows/native/launchers?), and starting to compile it with the build.
>>> (Stuff that's not built regularly is doomed to bit rot.) It if is not
>>> used, I suggest we remove it.
>>> * And as I stated before, the medlialib directories are typically not
>>> used by libawt and friends. It is used by libmlib_image and
>>> libmlib_image_v, and should move away from the awt directory.
>>> /Magnus

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