build samples for Android on Windows

[elix22]

I haven't found a way (the right config) to build "sapp-" samples for Android on Windows .
Is it possible ?

[floooh]

Hi, if the procedure described here doesn't work, then something seems to be broken again (not unusual with the Android dev tools unfortunately):

https://github.com/floooh/sokol-samples#to-build-for-android

What sort of errors are you getting?

PS: apart from the "usual tools" (python and cmake), you'd also need a make tool, e.g. via:

> scoop install make

PPS: the build config android-vscode-debug should also work on Windows, this uses the Ninja build tool instead of GNU make, and there comes a ninja executable for Windows bundled with fips.

I'll give it a try when I do some Windows stuff later today or tomorrow :)

[elix22]

Apparently the ndk-bundle downloaded into fips-sdks/android was wrong it was a 32 bit version .
I overridden it with my ndk-bundle and compilation succeeded , however the apps crash on one of my devices.

09-17 09:09:50.253  7326  7326 F DEBUG   : Abort message: 'D:/GAME-ENGINES/SOKOL/sokol\sokol_app.h:4841: int _sapp_android_main_cb(int, int, void *): assertion "result" failed'

09-17 09:09:50.254 7326 7326 F DEBUG : r0 00000000 r1 00001c98 r2 00000006 r3 00000008
09-17 09:09:50.254 7326 7326 F DEBUG : r4 00001c4a r5 00001c98 r6 904906bc r7 0000010c
09-17 09:09:50.254 7326 7326 F DEBUG : r8 00000000 r9 a2812540 sl 00000001 fp 00000000
09-17 09:09:50.254 7326 7326 F DEBUG : ip 90490770 sp 904906a8 lr aae658bd pc aae5f40e cpsr 200f0030

[floooh]

however the apps crash on one of my devices

Hmm, it's this assertion, meaning EGL initialization has failed:

https://github.com/floooh/sokol/blob/4c14c77d7816bd20df2e18a20c5b7125ff0433e4/sokol_app.h#L4841

Which can go wrong in these places:

https://github.com/floooh/sokol/blob/4c14c77d7816bd20df2e18a20c5b7125ff0433e4/sokol_app.h#L4522

https://github.com/floooh/sokol/blob/4c14c77d7816bd20df2e18a20c5b7125ff0433e4/sokol_app.h#L4525

https://github.com/floooh/sokol/blob/4c14c77d7816bd20df2e18a20c5b7125ff0433e4/sokol_app.h#L4576

Does that device support GLES3?

[floooh]

...I'm trying to reproduce the problem but I'm stuck finding an OpenJDK8 for Windows (scoop doesn't have one, and I can't find a download link that looks somewhat official anywhere, only for newer versions).

Basically, it's strange that a 32-bit NDK wouldn't work on a 64-bit Windows.

[elix22]

Regarding the 32 bit NDK , cmake is failing because the 32 bit ndk doesn't have an "windows-x86_64" folder

CMake Error at CMakeLists.txt:5 (project):
The CMAKE_C_COMPILER:

D:/GAME-ENGINES/SOKOL/fips-sdks/android/ndk-bundle/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe

is not a full path to an existing compiler tool.

I fixed several places and passing now _sapp_android_init_egl()
However I am getting the following error:

2019-09-17 13:34:29.127 8868-8954/org.fips.triangle_sapp I/SOKOL_APP: sg_pipeline_desc.shader missing or invalid
2019-09-17 13:34:29.127 8868-8954/org.fips.triangle_sapp I/SOKOL_APP: ^^^^ VALIDATION FAILED, TERMINATING

It's a low cost device (Xiaomi Redmi 6A), I configured cmake to

        add_definitions(-DSOKOL_GLES2)
        set(slang "glsl100")

On my LG G6 it's running fine

[elix22]

OK , I made it to work (GLES2).
Changes uploaded to GDrive.
https://drive.google.com/open?id=1Owf8wI969bvK7jiV8DF1acL0jm-q__pA

[floooh]

Hmm, if I'm seeing this right your changes essentially hardware the Android code path in sokol_app.h to GLES2.

The softer bit-depth selection looks useful though, I'll attach the changes here in case anyone wants to turn them into a pull request.

sokol_changes.zip

[floooh]

I've opened a new issue in the sokol repository:

floooh/sokol#218

[floooh]

...one last question: where did you get the 64-bit ndk-bundle? I want to open a fips issue for this (since it needs to be fixed there).

[elix22]

The NDK was taken from my sdk directory that came with Android Studio however you can download it directly from https://developer.android.com/ndk/downloads
There are both 32 bit and 64 bit NDK's.

I will P.R. the changes during the weekend.

[elix22]

I verified that GLES3 is also working on the same device so the following is needed to make it work :

const EGLint cfg_attributes[] = {
      EGL_SURFACE_TYPE, EGL_WINDOW_BIT,
#if defined(SOKOL_GLES3)
  	EGL_RENDERABLE_TYPE, EGL_OPENGL_ES3_BIT,
#else	
  	EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,
#endif
      EGL_RED_SIZE, 8,
      EGL_GREEN_SIZE, 8,
      EGL_BLUE_SIZE, 8,
      EGL_ALPHA_SIZE, alpha_size,
      EGL_DEPTH_SIZE, 16,
      EGL_STENCIL_SIZE, 0,
      EGL_NONE,
  };

[floooh]

Hmm, regarding the Android SDK/NDK 32/64-bit problems, I cannot reproduce them here on a Win10 machine.

Here's what I'm doing roughly (cmake, OpenJDK8 and make have been installed with scoop, and the commands are run in a "Developer Command Prompt for VS2015" terminal, and from within the sokol-samples directory

> cmake --version
cmake version 3.15.3
...
> java -version
openjdk version "1.8.0_212-1-ojdkbuild"
...
> make --version
GNU Make 4.2.1
Built for Windows32
...
> fips setup android
...
> fips gen
=== dependency: 'sokol':
dir 'D:/projects/sokol' exists
=== dependency: 'sokol-tools-bin':
dir 'D:/projects/sokol-tools-bin' exists
=== dependency: 'fips-glfw':
dir 'D:/projects/fips-glfw' exists
=== dependency: 'fips-cimgui':
dir 'D:/projects/fips-cimgui' exists
=== dependency: 'fips-imgui':
dir 'D:/projects/fips-imgui' exists
=== dependency: 'fips-libmodplug':
dir 'D:/projects/fips-libmodplug' exists
=== generating: sapp-android-make-debug
config file: D:/projects/sokol-samples/fips-files/configs/sapp-android-make-debug.yml
Using Toolchain File: D:/projects/fips/cmake-toolchains/android.toolchain.cmake
cmake -G "Unix Makefiles" -DCMAKE_BUILD_TYPE=Debug -DCMAKE_TOOLCHAIN_FILE=D:/projects/fips/cmake-toolchains/android.toolchain.cmake -DFIPS_CONFIG=sapp-android-make-debug -DUSE_SOKOL_APP=ON -DANDROID_ABI="armeabi-v7a" -DANDROID_PLATFORM="android-21" -DFIPS_USE_CCACHE=OFF -DFIPS_AUTO_IMPORT=OFF -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -BD:/projects/fips-build/sokol-samples/sapp-android-make-debug -HD:/projects/sokol-samples
-- Check for working C compiler: D:/projects/fips-sdks/android/ndk-bundle/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe
-- Check for working C compiler: D:/projects/fips-sdks/android/ndk-bundle/toolchains/llvm/prebuilt/windows-x86_64/bin/clang.exe -- works
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Detecting C compile features
-- Detecting C compile features - done
-- Check for working CXX compiler: D:/projects/fips-sdks/android/ndk-bundle/toolchains/llvm/prebuilt/windows-x86_64/bin/clang++.exe
-- Check for working CXX compiler: D:/projects/fips-sdks/android/ndk-bundle/toolchains/llvm/prebuilt/windows-x86_64/bin/clang++.exe -- works
-- Detecting CXX compiler ABI info
-- Detecting CXX compiler ABI info - done
-- Detecting CXX compile features
-- Detecting CXX compile features - done
CMAKE_BUILD_TYPE: Debug
FIPS_ROOT_DIR: D:/projects/fips
FIPS_PROJECT_DIR: D:/projects/sokol-samples
FIPS_BUILD_DIR: D:/projects/fips-build
FIPS_DEPLOY_DIR: D:/projects/fips-deploy
FIPS_PROJECT_NAME: sokol-samples
FIPS_AUTO_IMPORT: OFF
FIPS_CONFIG: sapp-android-make-debug
FIPS_PROJECT_BUILD_DIR: D:/projects/fips-build/sokol-samples/sapp-android-make-debug
FIPS_PROJECT_DEPLOY_DIR: D:/projects/fips-deploy/sokol-samples/sapp-android-make-debug
Host system: Windows
CMAKE_CXX_COMPILER_ID: Clang
Detected C++ Compiler: Clang (FIPS_CLANG)
FIPS_PLATFORM: ANDROID
FIPS_PLATFORM_NAME: android
-- Configuring done
-- Generating done
-- Build files have been written to: D:/projects/fips-build/sokol-samples/sapp-android-make-debug
1 configs generated

The following fips build also works (although the terminal colors are a bit messed up due to the cmake Makefile generator's colored output.

[elix22]

I tried on another laptop at my work and it downloaded the 64 bit ndk-bundle, compilation succeeded .
I have no clue why it downloaded the 32 bit ndk-bundle on my personal laptop , will try again during the weekend

[elix22]

OK , I found the root cause of the 32 bit ndk-bundle installation .

I have both 32 and 64 bit JDK's installed .
My environment vars were pointing to the 32 bit JDK :

JAVA_HOME
C:\Program Files (x86)\Java\jdk1.8.0_181

JDK_HOME
C:\Program Files (x86)\Java\jdk1.8.0_181

As a result

./fips setup android

downloaded the 32 bit ndk-bundle

Changing these environment variables to point to the 64 bit JDK solved the issue.

JAVA_HOME
C:\Program Files\Java\jdk1.8.0_181

JDK_HOME
C:\Program Files\Java\jdk1.8.0_181