How do I get the examples to run?

[nilsdoehring]

Hi and thank you for this great project!

I am wondering: Is the example supposed to work on emulated devices?
I'm using the latest stable releases of Android Studio, Flutter, Dart on an intel Mac, and I'm running into the following issues:

• Android emulator (API 30) results in RenderingContext.bufferData GLES error 1280 in cube.dart line 60.
• iOS simulator (IOS 14.4) build fails with error Undefined symbols for architecture x86_64 (details below).

Any idea?

iOS simulator build error:

Undefined symbols for architecture x86_64:
"_eglCreateWindowSurface", referenced from:
-[FlutterWebGlPlugin handleMethodCall:result:] in FlutterWebGlPlugin.o
"_eglChooseConfig", referenced from:
-[FlutterWebGlPlugin handleMethodCall:result:] in FlutterWebGlPlugin.o
"_eglMakeCurrent", referenced from:
-[FlutterWebGlPlugin handleMethodCall:result:] in FlutterWebGlPlugin.o
"_eglGetError", referenced from:
-[FlutterWebGlPlugin handleMethodCall:result:] in FlutterWebGlPlugin.o
"_eglInitialize", referenced from:
-[FlutterWebGlPlugin handleMethodCall:result:] in FlutterWebGlPlugin.o
"_eglCreateImageKHR", referenced from:
-[FlutterGlTexture createMtlTextureFromCVPixBufferWithWidth:andHeight:] in FlutterWebGlPlugin.o
"_eglQueryDisplayAttribEXT", referenced from:
_GetANGLEMtlDevice in FlutterWebGlPlugin.o
"_eglQueryDeviceAttribEXT", referenced from:
_GetANGLEMtlDevice in FlutterWebGlPlugin.o
"_eglGetDisplay", referenced from:
-[FlutterGlTexture createMtlTextureFromCVPixBufferWithWidth:andHeight:] in FlutterWebGlPlugin.o
-[FlutterWebGlPlugin handleMethodCall:result:] in FlutterWebGlPlugin.o
"_eglGetProcAddress", referenced from:
-[FlutterGlTexture createMtlTextureFromCVPixBufferWithWidth:andHeight:] in FlutterWebGlPlugin.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
note: Using new build system
note: Building targets in parallel
note: Planning build
note: Constructing build description

Could not build the application for the simulator.
Error launching application on iPhone 12 Pro Max.

Android emulator runtime error:

Syncing files to device Android SDK built for x86...
D/EGL_emulation( 4441): eglCreateContext: 0xf42e2bb0: maj 3 min 0 rcv 3
D/EGL_emulation( 4441): eglMakeCurrent: 0xf42e2bb0: ver 3 0 (tinfo 0xf4638970) (first time)
I/FlutterWegGL( 4441): OpenGL initialized: Vendor:Google (ATI Technologies Inc.)ANDROID_EMU_read_color_buffer_dma renderer: Android Emulator OpenGL ES Translator (AMD Radeon Pro 555X OpenGL Engine)ANDROID_EMU_read_color_buffer_dma Version: OpenGL ES 3.0 (4.1 ATI-4.6.20)ANDROID_EMU_read_color_buffer_dma
D/OpenGLManager( 4441): Successfully initialized GL in plugin
W/Gralloc4( 4441): allocator 3.x is not supported
I/flutter ( 4441): EGL version: 1.4
D/HostConnection( 4441): HostConnection::get() New Host Connection established 0xf42e2980, tid 4470
D/HostConnection( 4441): HostComposition ext ANDROID_EMU_CHECKSUM_HELPER_v1 ANDROID_EMU_native_sync_v2 ANDROID_EMU_native_sync_v3 ANDROID_EMU_native_sync_v4 ANDROID_EMU_dma_v1 ANDROID_EMU_direct_mem ANDROID_EMU_host_composition_v1 ANDROID_EMU_host_composition_v2 ANDROID_EMU_YUV_Cache ANDROID_EMU_async_unmap_buffer ANDROID_EMU_has_shared_slots_host_memory_allocator ANDROID_EMU_sync_buffer_data ANDROID_EMU_read_color_buffer_dma GL_OES_EGL_image_external_essl3 GL_OES_vertex_array_object GL_KHR_texture_compression_astc_ldr ANDROID_EMU_host_side_tracing ANDROID_EMU_async_frame_commands ANDROID_EMU_gles_max_version_3_0
D/EGL_emulation( 4441): eglCreateContext: 0xf42e2a60: maj 3 min 0 rcv 3
D/EGL_emulation( 4441): eglMakeCurrent: 0xf42e2a60: ver 3 0 (tinfo 0xc0fc8cf0) (first time)
I/FlutterWebGL( 4441): Created a new texture 640x320
I/flutter ( 4441): RenderingContext.bufferData GLES error 1280

[escamoteur]

Hi, sorry for the long time to respond for me, but I had to struggle with my mental health for the last 7 months.

you have to make sure your Emulator uses the latest EGL Version. you can set that in the Advanced setting of your Emulator.
On iOS this is indeed a problem that I couldn't solve yet