1// Copyright 2017 The Android Open Source Project
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#include "host-common/opengl/macTouchOpenGL.h"
16
17#include <Cocoa/Cocoa.h>
18#include <OpenGL/OpenGL.h>
19
20static NSOpenGLPixelFormatAttribute testAttrs[] =
21{
22    NSOpenGLPFADoubleBuffer,
23    NSOpenGLPFAWindow,
24    NSOpenGLPFAPixelBuffer,
25    NSOpenGLPFAColorSize   ,32,
26    NSOpenGLPFADepthSize   ,24,
27    NSOpenGLPFAStencilSize ,8,
28    0
29};
30
31// In order for IOKit to know the latest GPU selection status, we need
32// to touch OpenGL a little bit. Here, we allocate and initialize a pixel
33// format, which seems to be enough.
34void macTouchOpenGL() {
35    void* res = [[NSOpenGLPixelFormat alloc] initWithAttributes:testAttrs];
36    [res release];
37}
38