// Get the attribute value for the specified rendering context.
EGLBoolean eglQueryContext(EGLDisplay dpy, EGLContext ctx, EGLint attribute,
EGLint* value) {
EGL_API_ENTRY("%p, %p, 0x%x, %p", dpy, ctx, attribute, value);
EglDisplayImpl* display = EglDisplayImpl::GetDisplay(dpy);
if (display == NULL || display->IsInitialized() == false) {
SetError(EGL_BAD_DISPLAY);
return EGL_FALSE;
}
ContextPtr context = display->GetContexts().Get(ctx);
if (context == NULL) {
SetError(EGL_BAD_CONTEXT);
return EGL_FALSE;
}
switch (attribute) {
case EGL_CONFIG_ID:
return display->GetConfigAttribute(context->config, attribute, value);
case EGL_CONTEXT_CLIENT_TYPE:
*value = EGL_OPENGL_ES_API;
return EGL_TRUE;
case EGL_CONTEXT_CLIENT_VERSION:
*value = context->GetVersion();
return EGL_TRUE;
case EGL_RENDER_BUFFER:
if (context->GetSurface() == NULL)
*value = EGL_NONE;
else
*value = EGL_BACK_BUFFER; // single buffer not supported
return EGL_TRUE;
case EGL_ARC_UNDERLYING_CONTEXT: {
NativeContext* native = context->GetNativeContext();
*value = reinterpret_cast<EGLint>(Native::GetUnderlyingContext(native));
return EGL_TRUE;
}
default:
ALOGE("Unsupported attribute: %x", attribute);
SetError(EGL_BAD_ATTRIBUTE);
return EGL_FALSE;
}
}
