我有一個(gè) SDL2 go 程序，它試圖將像素陣列寫入屏幕。當(dāng)我嘗試使用新像素更新紋理時(shí)，程序會(huì)因運(yùn)行時(shí)錯(cuò)誤而恐慌：fatal error: unexpected signal during runtime execution不幸的是，我?guī)缀跽也坏疥P(guān)于如何在 Go 中傳遞不安全指針的文檔，我不確定我是否正確地處理了這個(gè)問題，下面是一些展示問題的示例代碼：func main() { window := sdl.CreateWindow("test", sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED, 800, 600, sdl.WINDOW_SHOWN) renderer := sdl.CreateRenderer(window, -1, 0) texture := sdl.CreateTexture(renderer, sdl.PIXELFORMAT_ARGB8888, sdl.TEXTUREACCESS_STATIC, 800, 600) defer renderer.Destroy() defer texture.Destroy() defer window.Destroy() for { pixels := make([]uint32, 800*600) texture.Update(nil, unsafe.Pointer(&pixels), int(800*unsafe.Sizeof(pixels))) window.UpdateSurface() renderer.Clear() renderer.Copy(texture, nil, nil) renderer.Present() } sdl.Delay(1000) sdl.Quit()}這段代碼編譯時(shí)不會(huì)出錯(cuò)，但運(yùn)行時(shí)會(huì)產(chǎn)生運(yùn)行時(shí)恐慌，但我看不出這段代碼中是什么導(dǎo)致了這種情況。我正在使用這些 SDL2 Go 綁定：https : //github.com/veandco/go-sdl2
1 回答
UYOU
TA貢獻(xiàn)1878條經(jīng)驗(yàn) 獲得超4個(gè)贊
間距參數(shù)期望表面的寬度 * sizeof(int32) 盡我所能，此代碼有效并在每個(gè)循環(huán)中打印隨機(jī)像素：
func main() {
window, err := sdl.CreateWindow("test", sdl.WINDOWPOS_UNDEFINED,
sdl.WINDOWPOS_UNDEFINED, 800, 600, sdl.WINDOW_SHOWN)
if err != nil {
log.Fatal(err)
}
defer window.Destroy()
renderer, err := sdl.CreateRenderer(window, -1, 0)
if err != nil {
log.Fatal(err)
}
defer renderer.Destroy()
texture, err := renderer.CreateTexture(sdl.PIXELFORMAT_ARGB8888,
sdl.TEXTUREACCESS_STATIC, 800, 600)
if err != nil {
log.Fatal(err)
}
defer texture.Destroy()
pixels := make([]uint32, 800*600)
L:
for {
for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
if _, ok := event.(*sdl.QuitEvent); ok {
break L
}
}
for i := range pixels {
pixels[i] = 0x00777777 + uint32(rand.Intn(0x00AAAAAA))
}
//4 == sizeof(int32), unsafe.Sizeof(pixels) returns the actual size of
//the slice header which is 24
texture.Update(nil, unsafe.Pointer(&pixels[0]), 800*4)
window.UpdateSurface()
renderer.Clear()
renderer.Copy(texture, nil, nil)
renderer.Present()
}
sdl.Delay(1000)
sdl.Quit()
}
//編輯它應(yīng)該unsafe.Pointer(&pixels[0])不是unsafe.Pointer(&pixels)。
- 1 回答
- 0 關(guān)注
- 226 瀏覽
添加回答
舉報(bào)
0/150
提交
取消