forked from joejulian/gio
Elias Naur
45da52cee7
The app and app/internal/wm packages are tightly coupled, requiring quite a bit of forwarding types, values and constants from the internal package to export it. Further, no other package imports package wm. This change merges the two packages. While here, drop the pre-Go 1.14 SIGPIPE workaround. Signed-off-by: Elias Naur <mail@eliasnaur.com>
70 lines
1.2 KiB
Go
70 lines
1.2 KiB
Go
// SPDX-License-Identifier: Unlicense OR MIT
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package app
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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 glContext 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) (*glContext, 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 := &glContext{
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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 *glContext) RenderTarget() gpu.RenderTarget {
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return gpu.OpenGLRenderTarget{}
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}
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func (c *glContext) 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 *glContext) Release() {
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}
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func (c *glContext) 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 *glContext) Lock() error {
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return nil
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}
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func (c *glContext) Unlock() {}
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func (c *glContext) Refresh() 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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