func Vsync(enable bool) {
if enable {
C.SDL_GL_SetSwapInterval(1)
} else {
C.SDL_GL_SetSwapInterval(0)
}
}
// SetVerticalSync sets the vertical sync status
func (window *Screen) SetVerticalSync(enabled bool) {
if enabled {
C.SDL_GL_SetSwapInterval(1)
} else {
C.SDL_GL_SetSwapInterval(0)
}
window.vsync = enabled
}
func GL_SetSwapInterval(vsync bool) error {
var interval C.int
if vsync {
interval = 1
}
if C.SDL_GL_SetSwapInterval(interval) != 0 {
return getError()
}
return nil
}
// New returns a newly created Screen
func New(width int, height int, fullscreen bool, FSAA int, name string) *Screen {
window := &Screen{}
C.SDL_Init(C.SDL_INIT_VIDEO)
C.setGlContextAttributes()
C.SDL_GL_SetAttribute(C.SDL_GL_DOUBLEBUFFER, 1)
// Force hardware accel
C.SDL_GL_SetAttribute(C.SDL_GL_ACCELERATED_VISUAL, 1)
if FSAA > 0 {
// FSAA (Fullscreen antialiasing)
C.SDL_GL_SetAttribute(C.SDL_GL_MULTISAMPLEBUFFERS, 1)
C.SDL_GL_SetAttribute(C.SDL_GL_MULTISAMPLESAMPLES, C.int(FSAA)) // 2, 4, 8
}
flags := C.SDL_WINDOW_OPENGL | C.SDL_RENDERER_ACCELERATED
if fullscreen {
flags = flags | C.SDL_WINDOW_FULLSCREEN
}
C.SDL_CreateWindowAndRenderer(C.int(width), C.int(height), C.Uint32(flags), &window.sdlWindow, &window.renderer)
C.SDL_SetWindowTitle(window.sdlWindow, C.CString(name))
C.SDL_GL_CreateContext(window.sdlWindow)
if err := gl.Init(); err != nil {
panic(err)
}
version := gl.GoStr(gl.GetString(gl.VERSION))
fmt.Println("OpenGL version", version)
// Configure global settings
gl.Enable(gl.BLEND)
gl.BlendFunc(gl.SRC_ALPHA, gl.ONE_MINUS_SRC_ALPHA)
gl.ClearColor(0.0, 0.0, 0.0, 1.0)
gl.Clear(gl.COLOR_BUFFER_BIT | gl.DEPTH_BUFFER_BIT)
window.Width = width
window.Height = height
window.name = name
window.shouldClose = false
C.SDL_GL_SwapWindow(window.sdlWindow)
window.startTime = time.Now()
window.frameTime = time.Now()
C.SDL_GL_SetSwapInterval(1)
window.vsync = true
return window
}
func GL_SetSwapInterval(_interval int) error {
if C.SDL_GL_SetSwapInterval(C.int(_interval)) < 0 {
return errors.New(GetError())
}
return nil
}
func GL_SetSwapInterval(interval int) int {
_interval := (C.int)(interval)
return (int)(C.SDL_GL_SetSwapInterval(_interval))
}
// GL_SetSwapInterval (https://wiki.libsdl.org/SDL_GL_SetSwapInterval)
func GL_SetSwapInterval(interval int) error {
if C.SDL_GL_SetSwapInterval(C.int(interval)) != 0 {
return GetError()
}
return nil
}
func GL_SetSwapInterval(interval int) int {
return int(C.SDL_GL_SetSwapInterval(C.int(interval)))
}