and ... here we go:
term% git/clone [email protected]:plan9foundation/ebiten
fetching... \
indexing 77609 objects: 100%
checking out repository...
term% cd ebiten/
term% git/branch -n -b origin/plan9 plan9
term$ cd examples/cursor
term% go build
term% ./cursor
panic: init not implemented
goroutine 1 [running]:
github.com/hajimehoshi/ebiten/v2/internal/ui.(*UserInterface).init(...)
/usr/glenda/ebiten/internal/ui/ui_plan9.go:101
github.com/hajimehoshi/ebiten/v2/internal/ui.newUserInterface()
/usr/glenda/ebiten/internal/ui/ui.go:124 +0x245
github.com/hajimehoshi/ebiten/v2/internal/ui.init.0()
/usr/glenda/ebiten/internal/ui/ui.go:99 +0x13
so it's a matter of filling in those blanks.
On Sat, Dec 13, 2025 at 8:04 PM ron minnich <[email protected]> wrote:
> if you check out the plan9 branch of
> [email protected]:plan9foundation/ebiten.git,
> and you cd to examples/cursor, you can
> GOOS=plan9 GOARCH=amd64 go build
> you'll get a plan 9 binary.
>
> You can run it; it won't end well. All the functions you need to implement
> (48 of them) are stubbed out to panic.
>
> This is pretty much how I port unknown Go or C code to 9: stub out the
> stuff I don't know how to do with panic (or for that matter, Plan 9 to a
> new architecture, or
> when we ported Plan 9 code to Akaros).
>
> Here are the functions.
>
> internal/ui/input_plan9.go:func (u *UserInterface)
> updateInputStateFromOutside(keyPressedTimes, keyReleasedTimes [KeyMax +
> 1]InputTime, runes []rune, touches []TouchForInput) {
> internal/ui/input_plan9.go:func (u *UserInterface)
> updateInputStateForFrame() error {
> internal/ui/input_plan9.go:func (u *UserInterface) KeyName(key Key) string
> {
> internal/ui/ui_plan9.go:func (g *graphicsDriverCreatorImpl) newAuto()
> (graphicsdriver.Graphics, GraphicsLibrary, error) {
> internal/ui/ui_plan9.go:func (g *graphicsDriverCreatorImpl) newOpenGL()
> (graphicsdriver.Graphics, error) {
> internal/ui/ui_plan9.go:func (*graphicsDriverCreatorImpl) newDirectX()
> (graphicsdriver.Graphics, error) {
> internal/ui/ui_plan9.go:func (g *graphicsDriverCreatorImpl) newMetal()
> (graphicsdriver.Graphics, error) {
> internal/ui/ui_plan9.go:func (*graphicsDriverCreatorImpl)
> newPlayStation5() (graphicsdriver.Graphics, error) {
> internal/ui/ui_plan9.go:func (u *UserInterface) SetUIView(uiview uintptr)
> error {
> internal/ui/ui_plan9.go:func (u *UserInterface) IsGL() (bool, error) {
> internal/ui/ui_plan9.go:func dipToNativePixels(x float64, scale float64)
> float64 {
> internal/ui/ui_plan9.go:func dipFromNativePixels(x float64, scale float64)
> float64 {
> internal/ui/ui_plan9.go:func (u *UserInterface) displayInfo() (int, int,
> float64, bool) {
> internal/ui/ui_plan9.go:func (u *UserInterface) init() error {
> internal/ui/ui_plan9.go:func (u *UserInterface) Update() error {
> internal/ui/ui_plan9.go:func (u *UserInterface) SetForeground(foreground
> bool) error {
> internal/ui/ui_plan9.go:func (u *UserInterface) RunWithoutMainLoop(game
> Game, options *RunOptions) {
> internal/ui/ui_plan9.go:func (u *UserInterface) runMobile(game Game,
> options *RunOptions) (err error) {
> internal/ui/ui_plan9.go:func (u *UserInterface) outsideSize() (float64,
> float64) {
> internal/ui/ui_plan9.go:func (u *UserInterface) update() error {
> internal/ui/ui_plan9.go:func (u *UserInterface)
> SetOutsideSize(outsideWidth, outsideHeight float64) {
> internal/ui/ui_plan9.go:func (u *UserInterface) CursorMode() CursorMode {
> internal/ui/ui_plan9.go:func (u *UserInterface) SetCursorMode(mode
> CursorMode) {
> internal/ui/ui_plan9.go:func (u *UserInterface) CursorShape() CursorShape {
> internal/ui/ui_plan9.go:func (u *UserInterface) SetCursorShape(shape
> CursorShape) {
> internal/ui/ui_plan9.go:func (u *UserInterface) IsFullscreen() bool {
> internal/ui/ui_plan9.go:func (u *UserInterface) SetFullscreen(fullscreen
> bool) {
> internal/ui/ui_plan9.go:func (u *UserInterface) IsFocused() bool {
> internal/ui/ui_plan9.go:func (u *UserInterface) IsRunnableOnUnfocused()
> bool {
> internal/ui/ui_plan9.go:func (u *UserInterface)
> SetRunnableOnUnfocused(runnableOnUnfocused bool) {
> internal/ui/ui_plan9.go:func (u *UserInterface) FPSMode() FPSModeType {
> internal/ui/ui_plan9.go:func (u *UserInterface) SetFPSMode(mode
> FPSModeType) {
> internal/ui/ui_plan9.go:func (u *UserInterface)
> updateExplicitRenderingModeIfNeeded(fpsMode FPSModeType) {
> internal/ui/ui_plan9.go:func (u *UserInterface) readInputState(inputState
> *InputState) {
> internal/ui/ui_plan9.go:func (u *UserInterface) Window() Window {
> internal/ui/ui_plan9.go:func (m *Monitor) Name() string {
> internal/ui/ui_plan9.go:func (m *Monitor) ensureValues() monitor {
> internal/ui/ui_plan9.go:func (m *Monitor) DeviceScaleFactor() float64 {
> internal/ui/ui_plan9.go:func (m *Monitor) Size() (int, int) {
> internal/ui/ui_plan9.go:func (u *UserInterface) AppendMonitors(mons
> []*Monitor) []*Monitor {
> internal/ui/ui_plan9.go:func (u *UserInterface) Monitor() *Monitor {
> internal/ui/ui_plan9.go:func (u *UserInterface)
> UpdateInput(keyPressedTimes, keyReleasedTimes [KeyMax + 1]InputTime, runes
> []rune, touches []TouchForInput) {
> internal/ui/ui_plan9.go:func (u *UserInterface) SetRenderer(renderer
> Renderer) {
> internal/ui/ui_plan9.go:func (u *UserInterface) ScheduleFrame() {
> internal/ui/ui_plan9.go:func (u *UserInterface) updateIconIfNeeded() error
> {
> internal/ui/ui_plan9.go:func IsScreenTransparentAvailable() bool {
> internal/ui/ui_plan9.go:func (u *UserInterface) initOnMainThread(options
> *RunOptions) error {
> internal/ui/ui_plan9.go:func (u *UserInterface) loopGame() error {
>
>
>
> On Sat, Dec 13, 2025 at 12:25 PM ron minnich <[email protected]> wrote:
>
>> https://github.com/hajimehoshi/ebiten
>>
>> I'm going to take a shot at turning off all linux dependencies, which
>> should remove GL dependencies, and see what's missing. But a look at the
>> graphics used on other platforms said to me that it doesn't demand too much.
>>
>> On Fri, Dec 12, 2025 at 1:07 PM Clout Tolstoy <[email protected]>
>> wrote:
>>
>>> npe looks like it has limited sdl2 support. That seems how you could get
>>> along the fastest without having to refactor image drawing, and IO to
>>> plan9 abstractions. Ebitengine requires a bit of C libraries that are
>>> unavailable on plan9/9front.
>>>
>>> Mainly referring to this data structure
>>>
>>> https://github.com/hajimehoshi/ebiten/blob/7d0692124a95528ee624ab641104e7a7bf1cb4b2/internal/graphicscommand/image.go#L31
>>>
>>> I'm not sure which (raylib/ebiten) would feel more daunting to port
>>> because of those dependencies.
>>>
>>> If you have a source repo of your efforts, I can try on a rpi0 or
>>> rpi4.
>>>
>>> Best of luck and sorry for the slight derail.
>>>
>>> Clout
>>>
>>>
>>>
>>>
>>> On Thu, Dec 11, 2025, 8:37 PM ron minnich <[email protected]> wrote:
>>>
>>>> My goal, for 9, was to look into a pure Go 2D game engine, to see if it
>>>> would work. This discussion spiraled off into thousands of other paths, as
>>>> things on this list are wont to do :-)
>>>>
>>>> But I'm still wondering if the 2D game engine in Go could work. I think
>>>> I'd better go look.
>>>>
>>>> On Thu, Dec 11, 2025 at 8:33 PM Noam Preil <[email protected]> wrote:
>>>>
>>>>> Fwiw if the goal is something like this on 9, raylib is likely a much
>>>>> better choice. It can render entirely in software, to a framebuffer, iirc,
>>>>> and is entirely in C.
>>>>>
>>>> *9fans <https://9fans.topicbox.com/latest>* / 9fans / see discussions
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