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app/internal/egl: support EGL_KHR_no_config_context

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The mesa surfaceless renderer doesn't support configs, but does
support EGL_KHR_no_config_context so no config is required. Don't
fail context creation in this setup.

With this change, the headless tests work on a headless linux with the
EGL_PLATFORM environment variable set to "surfaceless".

Signed-off-by: Elias Naur <mail@eliasnaur.com>
This commit is contained in:
Elias Naur
2020-12-17 20:31:04 +01:00
parent fd2d96adfc
commit fac1d00c89
1 changed files with 11 additions and 4 deletions
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app/internal/egl/egl.go
+11 -4
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@@ -230,11 +230,18 @@ func createContext(disp _EGLDisplay) (*eglContext, error) {
return nil, fmt.Errorf("eglChooseConfig failed: 0x%x", eglGetError())
}
if eglCfg == nilEGLConfig {
return nil, errors.New("eglChooseConfig returned 0 configs")
supportsNoCfg := hasExtension(exts, "EGL_KHR_no_config_context")
if !supportsNoCfg {
return nil, errors.New("eglChooseConfig returned no configs")
}
}
visID, ret := eglGetConfigAttrib(disp, eglCfg, _EGL_NATIVE_VISUAL_ID)
if !ret {
return nil, errors.New("newContext: eglGetConfigAttrib for _EGL_NATIVE_VISUAL_ID failed")
var visID _EGLint
if eglCfg != nilEGLConfig {
var ok bool
visID, ok = eglGetConfigAttrib(disp, eglCfg, _EGL_NATIVE_VISUAL_ID)
if !ok {
return nil, errors.New("newContext: eglGetConfigAttrib for _EGL_NATIVE_VISUAL_ID failed")
}
}
ctxAttribs := []_EGLint{
_EGL_CONTEXT_CLIENT_VERSION, 3,