forked from joejulian/gio
Elias Naur
7d84e419c9
Both the OpenGL and the Direct3D API are stateful and gpu.GPU renders to the render target current when Frame is called. Modern GPU API such as Metal don't have a concept of a current render target, and the target even changes each frame. Add RenderTarget and add an explicit target argument to GPU.Frame as well as the underlying driver.Device.BeginFrame. Signed-off-by: Elias Naur <mail@eliasnaur.com>
153 lines
2.9 KiB
Go
153 lines
2.9 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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// package wm implements platform specific windows
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// and GPU contexts.
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package wm
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import (
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"errors"
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"image/color"
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"gioui.org/io/key"
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"gioui.org/gpu"
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"gioui.org/io/event"
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"gioui.org/io/pointer"
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"gioui.org/io/system"
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"gioui.org/unit"
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)
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type Size struct {
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Width unit.Value
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Height unit.Value
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}
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type Options struct {
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Size *Size
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MinSize *Size
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MaxSize *Size
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Title *string
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WindowMode *WindowMode
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StatusColor *color.NRGBA
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NavigationColor *color.NRGBA
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Orientation *Orientation
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CustomRenderer bool
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}
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type WakeupEvent struct{}
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type WindowMode uint8
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const (
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Windowed WindowMode = iota
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Fullscreen
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)
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type Orientation uint8
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const (
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AnyOrientation Orientation = iota
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LandscapeOrientation
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PortraitOrientation
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)
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type FrameEvent struct {
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system.FrameEvent
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Sync bool
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}
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type Callbacks interface {
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SetDriver(d Driver)
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Event(e event.Event)
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// Func runs a function during an Event. This is required for platforms
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// that require coordination between the rendering goroutine and the system
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// main thread.
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Run(f func())
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}
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type Context interface {
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API() gpu.API
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RenderTarget() gpu.RenderTarget
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Present() error
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Refresh() error
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Release()
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Lock() error
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Unlock()
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}
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// ErrDeviceLost is returned from Context.Present when
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// the underlying GPU device is gone and should be
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// recreated.
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var ErrDeviceLost = errors.New("GPU device lost")
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// Driver is the interface for the platform implementation
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// of a window.
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type Driver interface {
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// SetAnimating sets the animation flag. When the window is animating,
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// FrameEvents are delivered as fast as the display can handle them.
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SetAnimating(anim bool)
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// ShowTextInput updates the virtual keyboard state.
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ShowTextInput(show bool)
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SetInputHint(mode key.InputHint)
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NewContext() (Context, error)
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// ReadClipboard requests the clipboard content.
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ReadClipboard()
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// WriteClipboard requests a clipboard write.
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WriteClipboard(s string)
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// Option processes option changes.
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Option(opts *Options)
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// SetCursor updates the current cursor to name.
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SetCursor(name pointer.CursorName)
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// Close the window.
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Close()
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// Wakeup wakes up the event loop and sends a WakeupEvent.
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Wakeup()
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}
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type windowRendezvous struct {
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in chan windowAndOptions
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out chan windowAndOptions
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errs chan error
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}
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type windowAndOptions struct {
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window Callbacks
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opts *Options
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}
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func newWindowRendezvous() *windowRendezvous {
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wr := &windowRendezvous{
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in: make(chan windowAndOptions),
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out: make(chan windowAndOptions),
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errs: make(chan error),
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}
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go func() {
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var main windowAndOptions
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var out chan windowAndOptions
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for {
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select {
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case w := <-wr.in:
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var err error
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if main.window != nil {
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err = errors.New("multiple windows are not supported")
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}
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wr.errs <- err
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main = w
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out = wr.out
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case out <- main:
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}
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}
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}()
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return wr
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}
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func (_ WakeupEvent) ImplementsEvent() {}
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