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 26 namespace android { 27 namespace uirenderer { 28 29 class Blend { 30 friend class RenderState; 31 public: 32 // dictates whether to swap src/dst 33 enum class ModeOrderSwap { 34 NoSwap, 35 Swap, 36 }; 37 38 void enable(SkXfermode::Mode mode, ModeOrderSwap modeUsage); 39 void disable(); 40 void syncEnabled(); 41 42 static void getFactors(SkXfermode::Mode mode, ModeOrderSwap modeUsage, 43 GLenum* outSrc, GLenum* outDst); 44 void setFactors(GLenum src, GLenum dst); 45 46 void dump(); 47 private: 48 Blend(); 49 void invalidate(); 50 bool mEnabled; 51 GLenum mSrcMode; 52 GLenum mDstMode; 53 }; 54 55 } /* namespace uirenderer */ 56 } /* namespace android */ 57 58 #endif // RENDERSTATE_BLEND_H 59
