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// SPDX-License-Identifier: Unlicense OR MIT
// +build linux,!android,!nowayland freebsd
package window
import (
"errors"
"unsafe"
"gioui.org/app/internal/egl"
)
/*
#cgo linux pkg-config: egl wayland-egl
#cgo freebsd openbsd LDFLAGS: -lwayland-egl
#cgo CFLAGS: -DMESA_EGL_NO_X11_HEADERS
#include <EGL/egl.h>
#include <wayland-client.h>
#include <wayland-egl.h>
*/
import "C"
type context struct {
win *window
*egl.Context
eglWin *C.struct_wl_egl_window
}
func (w *window) NewContext() (Context, error) {
disp := egl.NativeDisplayType(unsafe.Pointer(w.display()))
ctx, err := egl.NewContext(disp)
if err != nil {
return nil, err
}
return &context{Context: ctx, win: w}, nil
}
func (c *context) Release() {
if c.Context != nil {
c.Context.Release()
c.Context = nil
}
if c.eglWin != nil {
C.wl_egl_window_destroy(c.eglWin)
c.eglWin = nil
}
}
func (c *context) MakeCurrent() error {
c.Context.ReleaseSurface()
if c.eglWin != nil {
C.wl_egl_window_destroy(c.eglWin)
c.eglWin = nil
}
surf, width, height := c.win.surface()
if surf == nil {
return errors.New("wayland: no surface")
}
eglWin := C.wl_egl_window_create(surf, C.int(width), C.int(height))
if eglWin == nil {
return errors.New("wayland: wl_egl_window_create failed")
}
c.eglWin = eglWin
eglSurf := egl.NativeWindowType(uintptr(unsafe.Pointer(eglWin)))
if err := c.Context.CreateSurface(eglSurf, width, height); err != nil {
return err
}
return c.Context.MakeCurrent()
}
func (c *context) Lock() {}
func (c *context) Unlock() {}
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