UnrealXR/raylib-go
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implement va_list for tracelog callbacks in purego

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This commit is contained in:
JupiterRider 2024-05-14 23:17:31 +02:00
parent 6fd7907d31
commit fa7e76c6a6
1 changed files with 18 additions and 1 deletions
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19
raylib/purego_windows.go
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@ -5,6 +5,7 @@ package rl
import (
"fmt"
"syscall"
"unsafe"
"github.com/ebitengine/purego"
@ -16,6 +17,15 @@ const (
requiredVersion = "5.0"
)
var wvsprintfA uintptr
func init() {
handle, err := windows.LoadLibrary("user32.dll")
if err == nil {
wvsprintfA, _ = windows.GetProcAddress(handle, "wvsprintfA")
}
}
// loadLibrary loads the raylib dll and panics on error
func loadLibrary() uintptr {
handle, err := windows.LoadLibrary(libname)
@ -37,7 +47,14 @@ func loadLibrary() uintptr {
}
func traceLogCallbackWrapper(fn TraceLogCallbackFun) uintptr {
return purego.NewCallback(func(logLevel int32, text *byte) uintptr {
return purego.NewCallback(func(logLevel int32, text *byte, args unsafe.Pointer) uintptr {
if wvsprintfA != 0 {
var buffer [1024]byte // Max size is 1024 (see https://learn.microsoft.com/en-us/windows/win32/api/winuser/nf-winuser-wvsprintfa)
_, _, errno := syscall.SyscallN(wvsprintfA, uintptr(unsafe.Pointer(&buffer[0])), uintptr(unsafe.Pointer(text)), uintptr(args))
if errno == 0 {
text = &buffer[0]
}
}
fn(int(logLevel), windows.BytePtrToString(text))
return 0
})