```**Silk.NET.SDL.SdlException:** 'Failed loading _glDrawBuffer: undefined symbol: __glDrawBuffer' `

HHanprogramer ```**Silk.NET.SDL.SdlException:** 'Failed loading _glDrawBuffer: undefined symbo...

L

Lyris the Kitori•5/17/22, 5:35 AM

it seems its doubling up the _

H

HanprogramerOP•5/17/22, 5:36 AM

i just checked by adding random thing:

**Silk.NET.SDL.SdlException:** 'Failed loading _HANglGetString: undefined symbol: __HANglGetString'

**Silk.NET.SDL.SdlException:** 'Failed loading _HANglGetString: undefined symbol: __HANglGetString'

**Silk.NET.SDL.SdlException:** 'Failed loading _HANglGetString: undefined symbol: __HANglGetString'

**Silk.NET.SDL.SdlException:** 'Failed loading _HANglGetString: undefined symbol: __HANglGetString'

H

HanprogramerOP•5/17/22, 5:37 AM

H

HanprogramerOP•5/17/22, 5:37 AM

The backend on android is OpenGL ES, and apparently it doesn't have

glDrawBuffer

glDrawBuffer

glDrawBuffer

glDrawBuffer. It only exists in OpenGL. Is this true?

L

Lyris the Kitori•5/17/22, 5:40 AM

you could read the docs

L

Lyris the Kitori•5/17/22, 5:41 AM

which they state: https://www.khronos.org/registry/OpenGL-Refpages/es3.0/html/glDrawBuffers.xhtml

R

Redhacker2•5/17/22, 5:43 AM

So it's not true

H

HanprogramerOP•5/17/22, 5:43 AM

Isnt it different tho? it has

s

s in it?

L

Lyris the Kitori•5/17/22, 5:43 AM

oh

H

HanprogramerOP•5/17/22, 8:11 AM

I tried giving it a try catch:

[DOTNET] Failed loading _glDrawBuffer: undefined symbol: __glDrawBuffer
[DOTNET] Failed loading _glPolygonMode: undefined symbol: __glPolygonMode
[DOTNET] Failed loading _glBindFragDataLocation: undefined symbol: __glBindFragDataLocation
[DOTNET] Failed loading _glMapBuffer: undefined symbol: __glMapBuffer
[DOTNET] Failed loading _glGetQueryObjectiv: undefined symbol: __glGetQueryObjectiv
**System.Exception:** 'Error creating Skia Context for GL'

[DOTNET] Failed loading _glDrawBuffer: undefined symbol: __glDrawBuffer
[DOTNET] Failed loading _glPolygonMode: undefined symbol: __glPolygonMode
[DOTNET] Failed loading _glBindFragDataLocation: undefined symbol: __glBindFragDataLocation
[DOTNET] Failed loading _glMapBuffer: undefined symbol: __glMapBuffer
[DOTNET] Failed loading _glGetQueryObjectiv: undefined symbol: __glGetQueryObjectiv
**System.Exception:** 'Error creating Skia Context for GL'

[DOTNET] Failed loading _glDrawBuffer: undefined symbol: __glDrawBuffer
[DOTNET] Failed loading _glPolygonMode: undefined symbol: __glPolygonMode
[DOTNET] Failed loading _glBindFragDataLocation: undefined symbol: __glBindFragDataLocation
[DOTNET] Failed loading _glMapBuffer: undefined symbol: __glMapBuffer
[DOTNET] Failed loading _glGetQueryObjectiv: undefined symbol: __glGetQueryObjectiv
**System.Exception:** 'Error creating Skia Context for GL'

[DOTNET] Failed loading _glDrawBuffer: undefined symbol: __glDrawBuffer
[DOTNET] Failed loading _glPolygonMode: undefined symbol: __glPolygonMode
[DOTNET] Failed loading _glBindFragDataLocation: undefined symbol: __glBindFragDataLocation
[DOTNET] Failed loading _glMapBuffer: undefined symbol: __glMapBuffer
[DOTNET] Failed loading _glGetQueryObjectiv: undefined symbol: __glGetQueryObjectiv
**System.Exception:** 'Error creating Skia Context for GL'

H

HanprogramerOP•5/17/22, 8:26 AM

Ok nevermind about that, I used another way for the GL context

H

HanprogramerOP•5/17/22, 8:26 AM

but it crashes when I rotate the screen

H

HanprogramerOP•5/17/22, 8:27 AM

[Looper] PerfMonitor doFrame : time=64ms vsyncFrame=1218431 latency=675ms procState=18 historyMsgCount=7 (msgIndex=2 wall=645ms seq=233 running=22ms runnable=1ms binder=21ms late=102ms h=org.libsdl.app.SDLActivity$SDLCommandHandler w=0)
[OpenGLRenderer] Davey! duration=749ms; Flags=1, IntendedVsync=25496197045159, Vsync=25496872045132, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=25496873638449, AnimationStart=25496873642980, PerformTraversalsStart=25496875238293, DrawStart=25496928107564, SyncQueued=25496933524751, SyncStart=25496934146262, IssueDrawCommandsStart=25496935063345, SwapBuffers=25496943527772, FrameCompleted=25496947080637, DequeueBufferDuration=1200885, QueueBufferDuration=2394167, GpuCompleted=9223372036854775807, 
[SDL] surfaceDestroyed()
[SDL] nativePause()
**Silk.NET.SDL.SdlException:** 'Couldn't find display mode match'

[Looper] PerfMonitor doFrame : time=64ms vsyncFrame=1218431 latency=675ms procState=18 historyMsgCount=7 (msgIndex=2 wall=645ms seq=233 running=22ms runnable=1ms binder=21ms late=102ms h=org.libsdl.app.SDLActivity$SDLCommandHandler w=0)
[OpenGLRenderer] Davey! duration=749ms; Flags=1, IntendedVsync=25496197045159, Vsync=25496872045132, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=25496873638449, AnimationStart=25496873642980, PerformTraversalsStart=25496875238293, DrawStart=25496928107564, SyncQueued=25496933524751, SyncStart=25496934146262, IssueDrawCommandsStart=25496935063345, SwapBuffers=25496943527772, FrameCompleted=25496947080637, DequeueBufferDuration=1200885, QueueBufferDuration=2394167, GpuCompleted=9223372036854775807, 
[SDL] surfaceDestroyed()
[SDL] nativePause()
**Silk.NET.SDL.SdlException:** 'Couldn't find display mode match'

[Looper] PerfMonitor doFrame : time=64ms vsyncFrame=1218431 latency=675ms procState=18 historyMsgCount=7 (msgIndex=2 wall=645ms seq=233 running=22ms runnable=1ms binder=21ms late=102ms h=org.libsdl.app.SDLActivity$SDLCommandHandler w=0)
[OpenGLRenderer] Davey! duration=749ms; Flags=1, IntendedVsync=25496197045159, Vsync=25496872045132, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=25496873638449, AnimationStart=25496873642980, PerformTraversalsStart=25496875238293, DrawStart=25496928107564, SyncQueued=25496933524751, SyncStart=25496934146262, IssueDrawCommandsStart=25496935063345, SwapBuffers=25496943527772, FrameCompleted=25496947080637, DequeueBufferDuration=1200885, QueueBufferDuration=2394167, GpuCompleted=9223372036854775807, 
[SDL] surfaceDestroyed()
[SDL] nativePause()
**Silk.NET.SDL.SdlException:** 'Couldn't find display mode match'

[Looper] PerfMonitor doFrame : time=64ms vsyncFrame=1218431 latency=675ms procState=18 historyMsgCount=7 (msgIndex=2 wall=645ms seq=233 running=22ms runnable=1ms binder=21ms late=102ms h=org.libsdl.app.SDLActivity$SDLCommandHandler w=0)
[OpenGLRenderer] Davey! duration=749ms; Flags=1, IntendedVsync=25496197045159, Vsync=25496872045132, OldestInputEvent=9223372036854775807, NewestInputEvent=0, HandleInputStart=25496873638449, AnimationStart=25496873642980, PerformTraversalsStart=25496875238293, DrawStart=25496928107564, SyncQueued=25496933524751, SyncStart=25496934146262, IssueDrawCommandsStart=25496935063345, SwapBuffers=25496943527772, FrameCompleted=25496947080637, DequeueBufferDuration=1200885, QueueBufferDuration=2394167, GpuCompleted=9223372036854775807, 
[SDL] surfaceDestroyed()
[SDL] nativePause()
**Silk.NET.SDL.SdlException:** 'Couldn't find display mode match'

HHanprogramer I tried giving it a try catch: ``` [DOTNET] Failed loading _glDrawBuffer: undefi...

L

Lyris the Kitori•5/17/22, 8:30 AM

yeah it definitely seems like its wanting to create a GL context but you are on GLES

HHanprogramer but it crashes when I rotate the screen

L

Lyris the Kitori•5/17/22, 8:30 AM

i get the same problem, but i assumed it was my code

L

Lyris the Kitori•5/17/22, 8:30 AM

i guess not

H

HanprogramerOP•5/17/22, 8:34 AM

Here is without skia, just gl.Clear

[DecorView[]] getWindowModeFromSystem  windowmode is 1
[libEGL] validate_display:87 error 3008 (EGL_BAD_DISPLAY)
[SDL] surfaceDestroyed()
[SDL] nativePause()
[SDL] surfaceCreated()
[SDL] surfaceChanged()
[SDL] pixel format RGBA_8888
[SDL] Window size: 2177x855
[SDL] Device size: 1080x2400
[SDL] nativeResume()
[Looper] PerfMonitor longMsg : seq=58 plan=15:32:27.306 late=8ms wall=1928ms running=28ms runnable=80ms binder=90ms h=org.libsdl.app.SDLActivity$SDLCommandHandler w=0 procState=18
[SDL] surfaceDestroyed()
[SDL] nativePause()
[SDL] onStop()
[SDL] onDestroy()

[DecorView[]] getWindowModeFromSystem  windowmode is 1
[libEGL] validate_display:87 error 3008 (EGL_BAD_DISPLAY)
[SDL] surfaceDestroyed()
[SDL] nativePause()
[SDL] surfaceCreated()
[SDL] surfaceChanged()
[SDL] pixel format RGBA_8888
[SDL] Window size: 2177x855
[SDL] Device size: 1080x2400
[SDL] nativeResume()
[Looper] PerfMonitor longMsg : seq=58 plan=15:32:27.306 late=8ms wall=1928ms running=28ms runnable=80ms binder=90ms h=org.libsdl.app.SDLActivity$SDLCommandHandler w=0 procState=18
[SDL] surfaceDestroyed()
[SDL] nativePause()
[SDL] onStop()
[SDL] onDestroy()

[DecorView[]] getWindowModeFromSystem  windowmode is 1
[libEGL] validate_display:87 error 3008 (EGL_BAD_DISPLAY)
[SDL] surfaceDestroyed()
[SDL] nativePause()
[SDL] surfaceCreated()
[SDL] surfaceChanged()
[SDL] pixel format RGBA_8888
[SDL] Window size: 2177x855
[SDL] Device size: 1080x2400
[SDL] nativeResume()
[Looper] PerfMonitor longMsg : seq=58 plan=15:32:27.306 late=8ms wall=1928ms running=28ms runnable=80ms binder=90ms h=org.libsdl.app.SDLActivity$SDLCommandHandler w=0 procState=18
[SDL] surfaceDestroyed()
[SDL] nativePause()
[SDL] onStop()
[SDL] onDestroy()

[DecorView[]] getWindowModeFromSystem  windowmode is 1
[libEGL] validate_display:87 error 3008 (EGL_BAD_DISPLAY)
[SDL] surfaceDestroyed()
[SDL] nativePause()
[SDL] surfaceCreated()
[SDL] surfaceChanged()
[SDL] pixel format RGBA_8888
[SDL] Window size: 2177x855
[SDL] Device size: 1080x2400
[SDL] nativeResume()
[Looper] PerfMonitor longMsg : seq=58 plan=15:32:27.306 late=8ms wall=1928ms running=28ms runnable=80ms binder=90ms h=org.libsdl.app.SDLActivity$SDLCommandHandler w=0 procState=18
[SDL] surfaceDestroyed()
[SDL] nativePause()
[SDL] onStop()
[SDL] onDestroy()

H

HanprogramerOP•5/17/22, 8:34 AM

I wonder why

Window Size

Window Size

Window Size

Window Size and

Device Size

Device Size

Device Size

Device Size is different

H

HanprogramerOP•5/17/22, 8:35 AM

Moreover they arent swapped number positions or anything, just random

H

HanprogramerOP•5/17/22, 8:43 AM

So I think

Window Size

Window Size

Window Size

Window Size doesn't rotate or change at all, which it should be changing, while the

Device Size

Device Size

Device Size

Device Size does rotate

H

HanprogramerOP•5/17/22, 9:15 AM

This is found right after the screen rotates

[SDL] SDLActivity thread ends (error=Try to release egl_surface with context probably still active)

[SDL] SDLActivity thread ends (error=Try to release egl_surface with context probably still active)

[SDL] SDLActivity thread ends (error=Try to release egl_surface with context probably still active)

[SDL] SDLActivity thread ends (error=Try to release egl_surface with context probably still active)

H

HanprogramerOP•5/17/22, 1:02 PM

@kaijellinghaus do you know any workaround for it?

E

elv•5/17/22, 3:05 PM

I'm curious why examples are using unsafe code. Is it necessary since I've never worked with unsafe code?

R

Redhacker2•5/17/22, 3:12 PM

Technically there are overloads that are safe

R

Redhacker2•5/17/22, 3:13 PM

However the return values might not be safe

F

Furball•5/17/22, 3:31 PM

if youre gonna use any of the apis silk has you will need to do unsafe whether you like it or not sooner or later

Eelv I'm curious why examples are using unsafe code. Is it necessary since I've never...

L

Lyris the Kitori•5/17/22, 3:32 PM

you can think of it like a C style ptr

Eelv I'm curious why examples are using unsafe code. Is it necessary since I've never...

R

Redhacker2•5/17/22, 3:36 PM

Really there is just no way around it

R

Redhacker2•5/17/22, 3:37 PM

you might as well just use the pointers anyway because you are often with return values going to be getting either a struct that contains pointers or a pointer itself

K

Kai•5/17/22, 3:37 PM

hopefully we can make most things safe in 3.0

R

Redhacker2•5/17/22, 3:37 PM

idealy

E

Eagle•5/17/22, 3:38 PM

Performance aside, isn't there always a safe/managed counterpart to unsafe concepts?

K

Kai•5/17/22, 3:38 PM

yes**

R

Redhacker2•5/17/22, 3:38 PM

not ALWAYS

R

Redhacker2•5/17/22, 3:38 PM

but most of the time

K

Kai•5/17/22, 3:39 PM

there is always some kind of safe concept

E

Eagle•5/17/22, 3:39 PM

The way I'm trying to approach thing is to make a safe layer in the backend of the C# side so the user code still uses managed code.

K

Kai•5/17/22, 3:39 PM

but sometimes the cost associated with that replacement is too great

E

Eagle•5/17/22, 3:39 PM

Like, even struct pointers can probably be classes, even though there might be a performance impact.

E

Eagle•5/17/22, 3:39 PM

Well, yeah, I'm not too savvy about the costs and stuff.

K

Kai•5/17/22, 3:39 PM

exactly, but the marshalling back and forth is not necessarily something we want to do for return types

K

Kai•5/17/22, 3:40 PM

for overloads it's fine, as you choose what to put in

K

Kai•5/17/22, 3:40 PM

but the return type you can't choose

K

Kai•5/17/22, 3:40 PM

so we really want near zero-cost abstractions always

E

Eagle•5/17/22, 3:40 PM

I see. Has anyone done some benchmarking of this?

K

Kai•5/17/22, 3:41 PM

If you have a good baseline to suggest, I'd be happy to do so

E

Eagle•5/17/22, 3:41 PM

I don't think I'd be able to find this on the web myself. Lack of a way to phrase it.

K

Kai•5/17/22, 3:41 PM

but the overall feedback has been that people porting their apps to Silk have seen some performance benefit

R

Redhacker2•5/17/22, 3:42 PM

that is a good thing

K

Kai•5/17/22, 3:42 PM

it's very hard to benchmark, as most libs either don't provide the good overloading we do, so a comparison is unecessary, or they have them and don't care for performance so a comparison makes no sense

```Silk.NET.SDL.SdlException: 'Failed loading _glDrawBuffer: undefined symbol: __glDrawBuffer' `

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