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// SPDX-License-Identifier: Unlicense OR MIT
package app
import (
"golang.org/x/sys/windows"
"gioui.org/internal/egl"
)
type glContext struct {
win *window
*egl.Context
}
func init() {
drivers = append(drivers, gpuAPI{
priority: 2,
initializer: func(w *window) (context, error) {
disp := egl.NativeDisplayType(w.HDC())
ctx, err := egl.NewContext(disp)
if err != nil {
return nil, err
}
return &glContext{win: w, Context: ctx}, nil
},
})
}
func (c *glContext) Release() {
if c.Context != nil {
c.Context.Release()
c.Context = nil
}
}
func (c *glContext) Refresh() error {
c.Context.ReleaseSurface()
var (
win windows.Handle
width, height int
)
win, width, height = c.win.HWND()
eglSurf := egl.NativeWindowType(win)
if err := c.Context.CreateSurface(eglSurf, width, height); err != nil {
return err
}
if err := c.Context.MakeCurrent(); err != nil {
return err
}
c.Context.EnableVSync(true)
c.Context.ReleaseCurrent()
return nil
}
func (c *glContext) Lock() error {
return c.Context.MakeCurrent()
}
func (c *glContext) Unlock() {
c.Context.ReleaseCurrent()
}
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