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internal/gl: fix WebGL 1 support

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Fixes gio#231

Signed-off-by: Inkeliz <inkeliz@inkeliz.com>
This commit is contained in:
Inkeliz
2021-06-03 12:28:31 +01:00
committed by Elias Naur
parent 476d2269a6
commit 965792c1a9
1 changed files with 8 additions and 2 deletions
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internal/gl/gl_js.go
+8 -2
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@@ -19,6 +19,8 @@ type Functions struct {
// Cached JS arrays.
arrayBuf js.Value
int32Buf js.Value
isWebGL2 bool
}
type Context js.Value
@@ -36,8 +38,8 @@ func NewFunctions(ctx Context, forceES bool) (*Functions, error) {
func (f *Functions) Init() error {
webgl2Class := js.Global().Get("WebGL2RenderingContext")
iswebgl2 := !webgl2Class.IsUndefined() && f.Ctx.InstanceOf(webgl2Class)
if !iswebgl2 {
f.isWebGL2 = !webgl2Class.IsUndefined() && f.Ctx.InstanceOf(webgl2Class)
if !f.isWebGL2 {
f.EXT_disjoint_timer_query = f.getExtension("EXT_disjoint_timer_query")
if f.getExtension("OES_texture_half_float").IsNull() && f.getExtension("OES_texture_float").IsNull() {
return errors.New("gl: no support for neither OES_texture_half_float nor OES_texture_float")
@@ -232,6 +234,10 @@ func (f *Functions) GetRenderbufferParameteri(target, pname Enum) int {
return paramVal(f.Ctx.Call("getRenderbufferParameteri", int(pname)))
}
func (f *Functions) GetFramebufferAttachmentParameteri(target, attachment, pname Enum) int {
if !f.isWebGL2 && pname == FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING {
// FRAMEBUFFER_ATTACHMENT_COLOR_ENCODING is only available on WebGL 2
return LINEAR
}
return paramVal(f.Ctx.Call("getFramebufferAttachmentParameter", int(target), int(attachment), int(pname)))
}
func (f *Functions) GetBinding(pname Enum) Object {