func mainLoop(width, height int) {
// SDL window must be created in the same thread where the events are
// polled. Hence this stuff must be in a separate goroutine along with the
// event loop.
initFlags := int64(C.SDL_INIT_VIDEO) | int64(C.SDL_INIT_AUDIO)
screenFlags := 0
if C.SDL_Init(C.Uint32(initFlags)) == C.int(-1) {
panic(getError())
}
screen := C.SDL_SetVideoMode(
C.int(width), C.int(height), 32, C.Uint32(screenFlags))
if screen == nil {
panic(getError())
}
C.SDL_EnableUNICODE(1)
C.SDL_EnableKeyRepeat(C.SDL_DEFAULT_REPEAT_DELAY, C.SDL_DEFAULT_REPEAT_INTERVAL)
initAudio()
// Synchronize with Run function.
coord <- true
eventLoop()
C.SDL_Quit()
// Synchronize with Stop function.
coord <- true
runLevel = off
}
func MasksToPixelFormatEnum(bpp int, rm, gm, bm, am uint32) (uint32, error) {
f := C.SDL_MasksToPixelFormatEnum(C.int(bpp), C.Uint32(rm), C.Uint32(gm), C.Uint32(bm), C.Uint32(am))
if f == PIXELFORMAT_UNKNOWN {
return 0, getError()
}
return uint32(f), nil
}
func (s *Surface) ConvertFormat(pf uint32, flags uint32) (*Surface, error) {
cs := C.SDL_ConvertSurfaceFormat(s.c(), C.Uint32(pf), C.Uint32(flags))
if cs == nil {
return nil, getError()
}
return (*Surface)(unsafe.Pointer(cs)), nil
}
func (this Surface) UpdateRect(rect Rect) {
c_surface := (*C.SDL_Surface)(this.Ptr)
c_x := C.Sint32(rect.X)
c_y := C.Sint32(rect.Y)
c_w := C.Uint32(rect.W)
c_h := C.Uint32(rect.H)
C.SDL_UpdateRect(c_surface, c_x, c_y, c_w, c_h)
}
// Makes sure the given area is updated on the given screen. If x, y, w, and
// h are all 0, the whole screen will be updated.
func (screen *Surface) UpdateRect(x int32, y int32, w uint32, h uint32) {
GlobalMutex.Lock()
screen.mutex.Lock()
C.SDL_UpdateRect(screen.cSurface, C.Sint32(x), C.Sint32(y), C.Uint32(w), C.Uint32(h))
screen.mutex.Unlock()
GlobalMutex.Unlock()
}
// Creates an empty Surface.
func CreateRGBSurface(flags uint32, width int, height int, bpp int, Rmask uint32, Gmask uint32, Bmask uint32, Amask uint32) *Surface {
GlobalMutex.Lock()
p := C.SDL_CreateRGBSurface(C.Uint32(flags), C.int(width), C.int(height), C.int(bpp),
C.Uint32(Rmask), C.Uint32(Gmask), C.Uint32(Bmask), C.Uint32(Amask))
GlobalMutex.Unlock()
return wrap(p)
}
func CreateRGBSurface(flags uint32, width, height, depth int32, Rmask, Gmask, Bmask, Amask uint32) *Surface {
return (*Surface)(unsafe.Pointer(C.SDL_CreateRGBSurface(C.Uint32(flags),
C.int(width),
C.int(height),
C.int(depth),
C.Uint32(Rmask),
C.Uint32(Gmask),
C.Uint32(Bmask),
C.Uint32(Amask))))
}
func CreateRGBSurfaceFrom(pixels unsafe.Pointer, width, height, depth, pitch int, Rmask, Gmask, Bmask, Amask uint32) *Surface {
return (*Surface)(unsafe.Pointer(C.SDL_CreateRGBSurfaceFrom(pixels,
C.int(width),
C.int(height),
C.int(depth),
C.int(pitch),
C.Uint32(Rmask),
C.Uint32(Gmask),
C.Uint32(Bmask),
C.Uint32(Amask))))
}
// Initializes SDL.
func Init(flags uint32) int {
status := int(C.SDL_Init(C.Uint32(flags)))
if (status != 0) && (runtime.GOOS == "darwin") && (flags&INIT_VIDEO != 0) {
if os.Getenv("SDL_VIDEODRIVER") == "" {
os.Setenv("SDL_VIDEODRIVER", "x11")
status = int(C.SDL_Init(C.Uint32(flags)))
if status != 0 {
os.Setenv("SDL_VIDEODRIVER", "")
}
}
}
return status
}
// CreateRGBSurface (https://wiki.libsdl.org/SDL_CreateRGBSurface)
func CreateRGBSurface(flags uint32, width, height, depth int32, Rmask, Gmask, Bmask, Amask uint32) (*Surface, error) {
surface := (*Surface)(unsafe.Pointer(C.SDL_CreateRGBSurface(
C.Uint32(flags),
C.int(width),
C.int(height),
C.int(depth),
C.Uint32(Rmask),
C.Uint32(Gmask),
C.Uint32(Bmask),
C.Uint32(Amask))))
if surface == nil {
return nil, GetError()
}
return surface, nil
}
// Initializes subsystems.
func InitSubSystem(flags uint32) int {
GlobalMutex.Lock()
status := int(C.SDL_InitSubSystem(C.Uint32(flags)))
if (status != 0) && (runtime.GOOS == "darwin") && (flags&INIT_VIDEO != 0) {
if os.Getenv("SDL_VIDEODRIVER") == "" {
os.Setenv("SDL_VIDEODRIVER", "x11")
status = int(C.SDL_InitSubSystem(C.Uint32(flags)))
if status != 0 {
os.Setenv("SDL_VIDEODRIVER", "")
}
}
}
GlobalMutex.Unlock()
return status
}
func FilledCircleColor(renderer *sdl.Renderer, x, y, rad int, color sdl.Color) bool {
_x := C.Sint16(x)
_y := C.Sint16(y)
_rad := C.Sint16(rad)
_color := C.Uint32(gfxColor(color))
return C.filledCircleColor(renderer, _x, _y, _rad, _color) == 0
}
// AllocFormat creates a PixelFormat structure from a uint.
// AllocFormat (https://wiki.libsdl.org/SDL_AllocFormat)
func AllocFormat(format uint) (*PixelFormat, error) {
r := (*PixelFormat)(unsafe.Pointer(C.SDL_AllocFormat(C.Uint32(format))))
if r == nil {
return nil, GetError()
}
return r, nil
}
func StringColor(renderer *sdl.Renderer, x, y int, s string, color sdl.Color) bool {
_x := C.Sint16(x)
_y := C.Sint16(y)
_s := C.CString(s)
_color := C.Uint32(gfxColor(color))
return C.stringColor(renderer, _x, _y, _s, _color) == 0
}
func HlineColor(renderer *sdl.Renderer, x1, x2, y int, color sdl.Color) bool {
_x1 := C.Sint16(x1)
_x2 := C.Sint16(x2)
_y := C.Sint16(y)
_color := C.Uint32(gfxColor(color))
return C.hlineColor(renderer, _x1, _x2, _y, _color) == 0
}
func InitSubSystem(flags uint32) error {
if C.SDL_InitSubSystem(C.Uint32(flags)) != 0 {
return getError()
}
return nil
}
// NewWindow returns a new window.
func NewWindow(title string, w, h int) *Window {
win := &Window{
events: make(chan interface{}, eventChanSize),
imgs: make(map[string]texture),
}
do(func() {
ctitle := C.CString(title)
defer C.free(unsafe.Pointer(ctitle))
x, y := C.SDL_WINDOWPOS_UNDEFINED, C.SDL_WINDOWPOS_UNDEFINED
flags := C.SDL_WINDOW_SHOWN | C.SDL_WINDOW_OPENGL
win.win = C.SDL_CreateWindow(ctitle, C.int(x), C.int(y), C.int(w), C.int(h), C.Uint32(flags))
if win.win == nil {
panic(sdlError())
}
win.rend = C.SDL_CreateRenderer(win.win, 0, C.SDL_RENDERER_ACCELERATED)
if win.rend == nil {
panic(sdlError())
}
if C.SDL_SetRenderDrawBlendMode(win.rend, C.SDL_BLENDMODE_BLEND) < 0 {
panic(sdlError())
}
win.id = windowID(C.SDL_GetWindowID(win.win))
windows[win.id] = win
})
return win
}
// CreateSemaphore (https://wiki.libsdl.org/SDL_CreateSemaphore)
func CreateSemaphore(initialValue uint32) (*Sem, error) {
sem := C.SDL_CreateSemaphore(C.Uint32(initialValue))
if sem == nil {
return nil, GetError()
}
return (*Sem)(unsafe.Pointer(sem)), nil
}
// Sets up a video mode with the specified width, height, bits-per-pixel and
// returns a corresponding surface. You don't need to call the Free method
// of the returned surface, as it will be done automatically by sdl.Quit.
func SetVideoMode(w int, h int, bpp int, flags uint32) *Surface {
GlobalMutex.Lock()
var screen = C.SDL_SetVideoMode(C.int(w), C.int(h), C.int(bpp), C.Uint32(flags))
currentVideoSurface = wrap(screen)
GlobalMutex.Unlock()
return currentVideoSurface
}
// CreateRenderer (https://wiki.libsdl.org/SDL_CreateRenderer)
func CreateRenderer(window *Window, index int, flags uint32) (*Renderer, error) {
_renderer := C.SDL_CreateRenderer(window.cptr(), C.int(index), C.Uint32(flags))
if _renderer == nil {
return nil, GetError()
}
return (*Renderer)(unsafe.Pointer(_renderer)), nil
}
// Renderer (https://wiki.libsdl.org/SDL_RenderReadPixels)
func (renderer *Renderer) ReadPixels(rect *Rect, format uint32, pixels unsafe.Pointer, pitch int) error {
_ret := C.SDL_RenderReadPixels(renderer.cptr(), rect.cptr(), C.Uint32(format), pixels, C.int(pitch))
if _ret < 0 {
return GetError()
}
return nil
}
func (win *Window) SetFullscreen(flags WindowFlags) error {
if C.SDL_SetWindowFullscreen(win.c, C.Uint32(flags)) != 0 {
return getError()
}
return nil
}
func (w *Window) ShowSimpleMessageBox(flags uint32, title, message string) {
ctitle, cmessage := C.CString(title), C.CString(message)
C.SDL_ShowSimpleMessageBox(C.Uint32(flags), ctitle, cmessage, w.cWindow)
C.free(unsafe.Pointer(ctitle))
C.free(unsafe.Pointer(cmessage))
}
func CreateWindow(title string, x int, y int, w int, h int, flags uint32) *Window {
_title := C.CString(title)
defer C.free(unsafe.Pointer(_title))
var window = C.SDL_CreateWindow(_title, C.int(x), C.int(y),
C.int(w), C.int(h), C.Uint32(flags))
return (*Window)(unsafe.Pointer(window))
}
func SetVideoMode(width int, height int, bpp int, flags int) {
screen := C.SDL_SetVideoMode(C.int(width), C.int(height), C.int(bpp), C.Uint32(flags))
if screen == nil {
panic("unable to set video mode")
}
}
func FilledPolygonColor(renderer *sdl.Renderer, vx, vy []int16, color sdl.Color) bool {
_vx := (*C.Sint16)(unsafe.Pointer(&vx[0]))
_vy := (*C.Sint16)(unsafe.Pointer(&vy[0]))
_len := C.int(min(len(vx), len(vy)))
_color := C.Uint32(gfxColor(color))
return C.filledPolygonColor(renderer, _vx, _vy, _len, _color) == 0
}
// Returns the list of available screen dimensions for the given format.
//
// NOTE: The result of this function uses a different encoding than the underlying C function.
// It returns an empty array if no modes are available,
// and nil if any dimension is okay for the given format.
func ListModes(format *PixelFormat, flags uint32) []Rect {
modes := C.SDL_ListModes((*C.SDL_PixelFormat)(cast(format)), C.Uint32(flags))
// No modes available
if modes == nil {
return make([]Rect, 0)
}
// (modes == -1) --> Any dimension is ok
if uintptr(unsafe.Pointer(modes))+1 == uintptr(0) {
return nil
}
count := 0
ptr := *modes //first element in the list
for ptr != nil {
count++
ptr = *(**C.SDL_Rect)(unsafe.Pointer(uintptr(unsafe.Pointer(modes)) + uintptr(count*unsafe.Sizeof(ptr))))
}
ret := make([]Rect, count)
for i := 0; i < count; i++ {
ptr := (**C.SDL_Rect)(unsafe.Pointer(uintptr(unsafe.Pointer(modes)) + uintptr(i*unsafe.Sizeof(*modes))))
var r *C.SDL_Rect = *ptr
ret[i].X = int16(r.x)
ret[i].Y = int16(r.y)
ret[i].W = uint16(r.w)
ret[i].H = uint16(r.h)
}
return ret
}
func CharacterColor(renderer *sdl.Renderer, x, y int, c byte, color sdl.Color) bool {
_x := C.Sint16(x)
_y := C.Sint16(y)
_c := C.char(c)
_color := C.Uint32(gfxColor(color))
return C.characterColor(renderer, _x, _y, _c, _color) == 0
}
func VlineColor(renderer *sdl.Renderer, x, y1, y2 int, color sdl.Color) bool {
_x := C.Sint16(x)
_y1 := C.Sint16(y1)
_y2 := C.Sint16(y2)
_color := C.Uint32(gfxColor(color))
return C.vlineColor(renderer, _x, _y1, _y2, _color) == 0
}
// GetWindowFromID (https://wiki.libsdl.org/SDL_GetWindowFromID)
func GetWindowFromID(id uint32) (*Window, error) {
_window := C.SDL_GetWindowFromID(C.Uint32(id))
if _window == nil {
return nil, GetError()
}
return (*Window)(unsafe.Pointer((_window))), nil
}