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https://git.sr.ht/~eliasnaur/gio
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Elias Naur
0e592f8bc6
The NSViewGlobalFrameDidChangeNotification notification is documented to be fired every time [NSOpenGLContext update] needs to be called. However, the notification fails to fire on my setup when a window is moved to a display with a different pixel scale, which leads to incorrectly sized output. This change gets rid of the notification and updates the context before every frame. Signed-off-by: Elias Naur <mail@eliasnaur.com>
68 lines
1.2 KiB
Go
68 lines
1.2 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package wm
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import (
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"errors"
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"syscall/js"
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"gioui.org/gpu"
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"gioui.org/internal/gl"
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)
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type context struct {
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ctx js.Value
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cnv js.Value
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}
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func newContext(w *window) (*context, error) {
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args := map[string]interface{}{
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// Enable low latency rendering.
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// See https://developers.google.com/web/updates/2019/05/desynchronized.
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"desynchronized": true,
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"preserveDrawingBuffer": true,
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}
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ctx := w.cnv.Call("getContext", "webgl2", args)
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if ctx.IsNull() {
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ctx = w.cnv.Call("getContext", "webgl", args)
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}
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if ctx.IsNull() {
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return nil, errors.New("app: webgl is not supported")
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}
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c := &context{
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ctx: ctx,
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cnv: w.cnv,
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}
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return c, nil
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}
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func (c *context) API() gpu.API {
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return gpu.OpenGL{Context: gl.Context(c.ctx)}
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}
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func (c *context) Release() {
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}
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func (c *context) Present() error {
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if c.ctx.Call("isContextLost").Bool() {
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return errors.New("context lost")
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}
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return nil
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}
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func (c *context) Lock() {}
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func (c *context) Unlock() {}
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func (c *context) Refresh() error {
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return nil
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}
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func (c *context) MakeCurrent() error {
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return nil
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}
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func (w *window) NewContext() (Context, error) {
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return newContext(w)
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}
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