1 /*
2 * Copyright (C) 2017 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License")
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16 #pragma once
17 
18 #include "aemu/base/Compiler.h"
19 
20 #include <GLES/gl.h>
21 
22 #include <unordered_map>
23 #include <vector>
24 
25 // Convenience class for the translator to perform some kind of
26 // workaround or emulation that touches a lot of GL state,
27 // like drawing fullscreen quads.
28 class ScopedGLState {
29 public:
30     ScopedGLState() = default;
31     void push(GLenum name);
32     void push(std::initializer_list<GLenum> names);
33     void pushForCoreProfileTextureEmulation();
34     ~ScopedGLState();
35 private:
36     struct StateVector {
37         union {
38             int intData[4];
39             float floatData[4];
40         };
41     };
42 
43     std::unordered_map<GLenum, StateVector> mStateMap;
44     DISALLOW_COPY_AND_ASSIGN(ScopedGLState);
45 };
46