1/*
2 * Copyright (C) 2015 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#ifndef RENDERSTATE_BLEND_H
17#define RENDERSTATE_BLEND_H
18
19#include "Vertex.h"
20
21#include <GLES2/gl2.h>
22#include <GLES2/gl2ext.h>
23#include <SkXfermode.h>
24#include <memory>
25
26namespace android {
27namespace uirenderer {
28
29class Blend {
30    friend class RenderState;
31public:
32    // dictates whether to swap src/dst
33    enum class ModeOrderSwap {
34        NoSwap,
35        Swap,
36    };
37    void syncEnabled();
38
39    static void getFactors(SkXfermode::Mode mode, ModeOrderSwap modeUsage,
40            GLenum* outSrc, GLenum* outDst);
41    void setFactors(GLenum src, GLenum dst);
42
43    void dump();
44private:
45    Blend();
46    void invalidate();
47    bool mEnabled;
48    GLenum mSrcMode;
49    GLenum mDstMode;
50};
51
52} /* namespace uirenderer */
53} /* namespace android */
54
55#endif // RENDERSTATE_BLEND_H
56