veandco / go-sdl2-examples Goto Github PK

Hi veandco,

When I run the recording-audio.go file I get this error message:
C:\Users*****\AppData\Local\Temp\go-build233611566\b001_cgo_main.o:/tmp/go-build/cgo-generated-wrappers:2: undefined reference to `OnAudio'
collect2.exe: error: ld returned 1 exit status

Can you help me with this?

Thanks
GNK03

Sorry, I copy pasted the file and for whatever reason there was an empty line every second line. Between "//export OnAudio" and "func OnAudio(userdata unsafe.Pointer, _stream *C.Uint8, _length C.int) {" can't be an empty line. This caused the error.

I've been trying to adapt audio/audio.go to pass toneHz, sampleHz, dPhase into SineWave, but I have no clue how it should be done

I am running the examples on MacOS Mojave and the window never appears even though the app icon shows the app is running in the task bar. If I call
sdl.PollEvent() or sdl.PumpEvents() just before the sdl.Delay(2000) line, then the window displays just fine. This happens for all of the examples that do not use an event loop.

When trying to compile examples/keyboard-input/keyboard-input.go, I get the following error:

impossible type switch case: sdl.QuitEvent
event (variable of type sdl.Event) cannot have dynamic type sdl.QuitEvent

This is due to a change following the commit "examples: updated to remove pointer in event switch cases" where "*sdl.QuitEvent" was replaced by "sdl.QuitEvent" in the switch statement.

If I put back the dereferencing operator '*', the code compiles.

There must be a good reason for the change in the commit. Could you explain the rationale please? Thank you in advance !

If that matters, I am using go1.22.2 linux/amd64

I successfully compiled the so file but encountered an error while opening the example app:

For ARM architecture:

For ARM64 architecture:

How to use go-sdl2-examples\examples\android examples on Windows platform. Is how to compile SDL2 on Windows10 platform to APK file .
The original README was for Linux, I don't know how to put it in Windows10.
Thank you!

CMD: go run main.go is an main.exe

Hi,

when i try to install gfx package with "go get github.com/veandco/go-sdl2/gfx"

C:/Program Files/mingw-w64/x86_64-7.3.0-posix-seh-rt_v5-rev0/mingw64/bin/../lib/gcc/x86_64-w64-mingw32/7.3.0/../../../../x86_64-w64-mingw32/bin/ld.exe: cannot find -lSDL2_gfx
collect2.exe: error: ld returned 1 exit status

I've downloaded SDL2_gfx-1.0.1 and tried to compile it with Visual Studio but i get several error's, i guess it's because of the arch.
Is there any precompiled or successful compilation of the SDL2_gfx lib for x64 ?

Thanks in advance,
Sam

When it comes to Event, most of code in examples look like this:

for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
    switch t := event.(type) {
    ...
    } 
}

Why the event (a interface) should be written = sdl.PollEvent() twice?

I have a problem with the cursor, it also occurs in the render example provided. The problem is if I move my mouse to the created window, it becomes unresponding.