OPengles3 Webassembly

fatimanaqvi

Helo,

I am on windows based linux console and i have to configure Qt 5.12.2 for webassembly suppporting Opengles 3

I have tried following configuration command but no gain :
./configure -opensource -confirm-license -xplatform wasm-emscripten -release -static -opengles3 -zlib -glib -combined-angle-lib -eglfs -xcb -v

It still not enabling for me opengles3 and says
:
ERROR: Feature 'opengles3' was enabled, but the pre-condition 'features.opengles2 && !features.angle && tests.opengles3 && !config.wasm' failed.

Please anyone could you please help

I also added these in my following folder : \qt5\qtbase\mkspecs\wasm-emscripten

qmake configuration for building with emscripten

MAKEFILE_GENERATOR = UNIX
QMAKE_PLATFORM = wasm unix

include(../common/gcc-base.conf)
include(../common/clang.conf)
#QMAKE_INCDIR += /home/izza/emsdk/emscripten/1.38.16/system/include
#QMAKE_LIBDIR += /home/izza/emsdk/emscripten/1.38.16/system/lib

#QMAKE_INCDIR_ZLIB=/home/izza/include/zlib
#QMAKE_LIBDIR_ZLIB=/home/izza/lib_emcc/
#QMAKE_INCDIR_OPENGL = /home/izza/emsdk/emscripten/1.38.16/system/include/GL
#QMAKE_LIBDIR_OPENGL = /home/izza/emsdk/emscripten/1.38.16/system/lib/pkgconfig/
QMAKE_INCDIR_EGL = /home/izza/emsdk/emscripten/1.38.16/system/include/EGL
QMAKE_LIBDIR_EGL =/home/izza/emsdk/emscripten/1.38.16/system/lib/pkgconfig/
QMAKE_INCDIR_OPENGL_ES2=/home/izza/emsdk/emscripten/1.38.16/system/include/GLES2
QMAKE_LIBDIR_OPENGL_ES2=/home/izza/emsdk/emscripten/1.38.16/system/lib/pkgconfig/
#QMAKE_INCDIR_OPENVG = $QMAKE_INCDIR_EGL
#QMAKE_LIBDIR_OPENVG = /home/izza/emsdk/emscripten/1.38.16/system/lib/pkgconfig/

QMAKE_LIBS_ZLIB= -lzlib
QMAKE_LIBS_EGL += egl.pc
#QMKAE_LIBS_GL += -lGL
QMAKE_LIBS_OPENGL_ES2 += glesv2 egl

EMTERP_FLAGS =
-s EMTERPRETIFY=1
-s EMTERPRETIFY_ASYNC=1
-s "EMTERPRETIFY_FILE='data.binary'"
-s ASSERTIONS=1
--profiling-funcs

EMCC_COMMON_LFLAGS =
-s WASM=1
-s FULL_ES3=1
-s ALLOW_MEMORY_GROWTH=1
-s USE_WEBGL2=1
-s NO_EXIT_RUNTIME=0
-s ERROR_ON_UNDEFINED_SYMBOLS=1
--bind
-s "BINARYEN_TRAP_MODE='clamp'"

The -s arguments can also be used with release builds,

but are here in debug for clarity.

EMCC_COMMON_LFLAGS_DEBUG =
$$EMCC_COMMON_LFLAGS
-s ASSERTIONS=2
-s DEMANGLE_SUPPORT=1
# -s LIBRARY_DEBUG=1 \ #print out library calls, verbose
# -s SYSCALL_DEBUG=1 \ #print out sys calls, verbose
# -s FS_LOG=1 \ #print out filesystem ops, verbose
# -s SOCKET_DEBUG \ #print out socket,network data transfer
-s GL_DEBUG=1

But still i see this : EGL .................................... yes
OpenVG ................................. no
OpenGL:
Desktop OpenGL ....................... no
OpenGL ES 2.0 ........................ yes
OpenGL ES 3.0 ........................ no
OpenGL ES 3.1 ........................ no
OpenGL ES 3.2 ........................ no
Vulkan ................................. no
Session Management ..................... yes

lorn.potter

opengles3 support has not yet been enabled. See this change:
https://codereview.qt-project.org/c/qt/qtbase/+/225310

As well, I am not sure you want to add -eglfs and -xcb, as these platform plugins are not used in wasm platform.

Not exactly sure -glib will gain you anything in particular, but it is not needed for wasm.

Please do let me know if you run into opengles3 issues!
https://bugreports.qt.io