LibGDX 1.9.5 上的 GWT (2.8.0) 字体文件解析错误
Font file parsing error with GWT (2.8.0) on LibGDX 1.9.5
我想知道我是否做错了什么，或者我是否偶然发现了 LibGDX/GWT 中的错误。我有一个带有 desktop/Android/iOS/HTML 后端的游戏，大约一个月前从 1.9.5-SNAPSHOT 升级到 1.9.5 导致 HTML 构建停止工作。我能看到的主要变化是从 2.6.0 升级到 GWT 2.8.0。
当我在浏览器中 运行 我的应用程序时（Chrome 56.0.2924.21 beta（64 位）在 Windows 10 上），我收到以下错误：
GwtApplication: exception: com.badlogic.gdx.utils.SerializationException: Error reading file: static/uiskin_hd.json
com.badlogic.gdx.utils.SerializationException: Error reading file: static/uiskin_hd.json
Error reading file: static/uiskin_hd.json
Error reading file: static/uiskin_hd.json
Error loading bitmap font: static/helsinki28plain_hd.fnt
Error loading font file: static/helsinki28plain_hd.fnt
Invalid page id:
For input string: ""
该字体之前一直有效，我对任何字体都得到了相同的结果，包括来自 LibGDX 测试的 default.fnt。字体文件的顶部如下所示：
info face="Helsinki" size=56 bold=0 italic=0 charset="" unicode=0 stretchH=100 smooth=1 aa=1 padding=2,2,8,4 spacing=0,0
common lineHeight=75 base=52 scaleW=512 scaleH=1024 pages=1 packed=0
page id=0 file="helsinki28plain_hd.png"
chars count=141
char id=32 x=0 y=0 width=0 height=0 xoffset=0 yoffset=52 xadvance=22 page=0 chnl=0
char id=92 x=0 y=0 width=24 height=72 xoffset=-2 yoffset=0 xadvance=22 page=0 chnl=0
char id=47 x=24 y=0 width=24 height=72 xoffset=-2 yoffset=0 xadvance=22 page=0 chnl=0
...
为了确保问题不是出在我的设置上，我检查了 LibGDX 的最新主分支并尝试 运行 GWT 测试：
git clone https://github.com/libgdx/libgdx.git
cd libgdx
ant -f fetch
ant
./gradlew tests:gdx-tests-gwt:draftRun
这似乎也失败了：
Compiling module com.badlogic.gdx.tests.gwt.GdxTestsGwt
Finding entry point classes
[ERROR] Errors in 'file:/C:/devtools/libgdx/gdx/src/com/badlogic/gdx/Net.java'
[ERROR] Line 80: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/GwtNet.java'
[ERROR] Line 70: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/preloader/Preloader.java'
[ERROR] Line 200: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Line 203: No source code is available for type java.io.ByteArrayInputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/com/badlogic/gdx/files/FileHandle.java'
[ERROR] Line 78: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/gdx/src/com/badlogic/gdx/net/Socket.java'
[ERROR] Line 41: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/preloader/Blob.java'
[ERROR] Line 38: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/io/BufferedInputStream.java'
[ERROR] Line 19: No source code is available for type java.io.FilterInputStream; did you forget to inherit a required module?
[ERROR] Line 20: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/io/Reader.java'
[ERROR] Line 33: No source code is available for type java.io.Closeable; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/io/Writer.java'
[ERROR] Line 30: No source code is available for type java.io.Closeable; did you forget to inherit a required module?
[ERROR] Line 30: No source code is available for type java.io.Flushable; did you forget to inherit a required module?
[ERROR] Unable to find type 'com.badlogic.gdx.tests.gwt.client.GwtTestStarter'
[ERROR] Hint: Previous compiler errors may have made this type unavailable
[ERROR] Hint: Check the inheritance chain from your module; it may not be inheriting a required module or a module may not be adding its source path entries properly
:tests:gdx-tests-gwt:draftCompileGwt FAILED
知道这是怎么回事吗？ (我的JavaSDK是jdk1.8.0_20)
看起来这是 LibGDX 1.9.5 中的错误。一些人已经提交了 pull requests 来修复它，所以我希望很快会有一个 1.9.6-SNAPSHOT 可以修复这个问题。
我想知道我是否做错了什么，或者我是否偶然发现了 LibGDX/GWT 中的错误。我有一个带有 desktop/Android/iOS/HTML 后端的游戏，大约一个月前从 1.9.5-SNAPSHOT 升级到 1.9.5 导致 HTML 构建停止工作。我能看到的主要变化是从 2.6.0 升级到 GWT 2.8.0。
当我在浏览器中 运行 我的应用程序时（Chrome 56.0.2924.21 beta（64 位）在 Windows 10 上），我收到以下错误：
GwtApplication: exception: com.badlogic.gdx.utils.SerializationException: Error reading file: static/uiskin_hd.json
com.badlogic.gdx.utils.SerializationException: Error reading file: static/uiskin_hd.json
Error reading file: static/uiskin_hd.json
Error reading file: static/uiskin_hd.json
Error loading bitmap font: static/helsinki28plain_hd.fnt
Error loading font file: static/helsinki28plain_hd.fnt
Invalid page id:
For input string: ""
该字体之前一直有效，我对任何字体都得到了相同的结果，包括来自 LibGDX 测试的 default.fnt。字体文件的顶部如下所示：
info face="Helsinki" size=56 bold=0 italic=0 charset="" unicode=0 stretchH=100 smooth=1 aa=1 padding=2,2,8,4 spacing=0,0
common lineHeight=75 base=52 scaleW=512 scaleH=1024 pages=1 packed=0
page id=0 file="helsinki28plain_hd.png"
chars count=141
char id=32 x=0 y=0 width=0 height=0 xoffset=0 yoffset=52 xadvance=22 page=0 chnl=0
char id=92 x=0 y=0 width=24 height=72 xoffset=-2 yoffset=0 xadvance=22 page=0 chnl=0
char id=47 x=24 y=0 width=24 height=72 xoffset=-2 yoffset=0 xadvance=22 page=0 chnl=0
...
为了确保问题不是出在我的设置上，我检查了 LibGDX 的最新主分支并尝试 运行 GWT 测试：
git clone https://github.com/libgdx/libgdx.git
cd libgdx
ant -f fetch
ant
./gradlew tests:gdx-tests-gwt:draftRun
这似乎也失败了：
Compiling module com.badlogic.gdx.tests.gwt.GdxTestsGwt
Finding entry point classes
[ERROR] Errors in 'file:/C:/devtools/libgdx/gdx/src/com/badlogic/gdx/Net.java'
[ERROR] Line 80: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/GwtNet.java'
[ERROR] Line 70: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/preloader/Preloader.java'
[ERROR] Line 200: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Line 203: No source code is available for type java.io.ByteArrayInputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/com/badlogic/gdx/files/FileHandle.java'
[ERROR] Line 78: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/gdx/src/com/badlogic/gdx/net/Socket.java'
[ERROR] Line 41: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/preloader/Blob.java'
[ERROR] Line 38: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/io/BufferedInputStream.java'
[ERROR] Line 19: No source code is available for type java.io.FilterInputStream; did you forget to inherit a required module?
[ERROR] Line 20: No source code is available for type java.io.InputStream; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/io/Reader.java'
[ERROR] Line 33: No source code is available for type java.io.Closeable; did you forget to inherit a required module?
[ERROR] Errors in 'file:/C:/devtools/libgdx/backends/gdx-backends-gwt/src/com/badlogic/gdx/backends/gwt/emu/java/io/Writer.java'
[ERROR] Line 30: No source code is available for type java.io.Closeable; did you forget to inherit a required module?
[ERROR] Line 30: No source code is available for type java.io.Flushable; did you forget to inherit a required module?
[ERROR] Unable to find type 'com.badlogic.gdx.tests.gwt.client.GwtTestStarter'
[ERROR] Hint: Previous compiler errors may have made this type unavailable
[ERROR] Hint: Check the inheritance chain from your module; it may not be inheriting a required module or a module may not be adding its source path entries properly
:tests:gdx-tests-gwt:draftCompileGwt FAILED
知道这是怎么回事吗？ (我的JavaSDK是jdk1.8.0_20)
看起来这是 LibGDX 1.9.5 中的错误。一些人已经提交了 pull requests 来修复它，所以我希望很快会有一个 1.9.6-SNAPSHOT 可以修复这个问题。