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Implement some preparation code for go2cpp

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Updates #744
This commit is contained in:
Hajime Hoshi
2020-11-22 18:22:52 +09:00
parent 912e13071f
commit 5897e1ab7c
5 changed files with 57 additions and 33 deletions
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38
internal/graphicsdriver/opengl/context_js.go
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@@ -85,6 +85,7 @@ const (
var (
isWebGL2Available = !forceWebGL1 && js.Global().Get("WebGL2RenderingContext").Truthy()
needsRestoring_ = !web.IsMobileBrowser() && !js.Global().Get("go2cpp").Truthy()
)
type contextImpl struct {
@@ -95,27 +96,28 @@ type contextImpl struct {
func (c *context) initGL() {
c.gl = js.Value{}
// TODO: Define id?
doc := js.Global().Get("document")
if !doc.Truthy() {
return
}
canvas := doc.Call("querySelector", "canvas")
attr := js.Global().Get("Object").New()
attr.Set("alpha", true)
attr.Set("premultipliedAlpha", true)
var gl js.Value
if isWebGL2Available {
gl = canvas.Call("getContext", "webgl2", attr)
} else {
gl = canvas.Call("getContext", "webgl", attr)
if jsutil.Equal(gl, js.Null()) {
gl = canvas.Call("getContext", "experimental-webgl", attr)
// TODO: Define id?
if doc := js.Global().Get("document"); doc.Truthy() {
canvas := doc.Call("querySelector", "canvas")
attr := js.Global().Get("Object").New()
attr.Set("alpha", true)
attr.Set("premultipliedAlpha", true)
if isWebGL2Available {
gl = canvas.Call("getContext", "webgl2", attr)
} else {
gl = canvas.Call("getContext", "webgl", attr)
if jsutil.Equal(gl, js.Null()) {
panic("opengl: getContext failed")
gl = canvas.Call("getContext", "experimental-webgl", attr)
if jsutil.Equal(gl, js.Null()) {
panic("opengl: getContext failed")
}
}
}
} else if go2cpp := js.Global().Get("go2cpp"); go2cpp.Truthy() {
gl = go2cpp.Get("gl")
}
c.gl = gl
@@ -493,7 +495,7 @@ func (c *context) flush() {
}
func (c *context) needsRestoring() bool {
return !web.IsMobileBrowser()
return needsRestoring_
}
func (c *context) canUsePBO() bool {