1 /* 2 * Copyright 2013 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 17 18 #ifndef SF_RENDERENGINE_H_ 19 #define SF_RENDERENGINE_H_ 20 21 #include <stdint.h> 22 #include <sys/types.h> 23 24 #include <EGL/egl.h> 25 #include <EGL/eglext.h> 26 #include <ui/mat4.h> 27 28 // --------------------------------------------------------------------------- 29 namespace android { 30 // --------------------------------------------------------------------------- 31 32 class String8; 33 class Rect; 34 class Region; 35 class Mesh; 36 class Texture; 37 38 class RenderEngine { 39 enum GlesVersion { 40 GLES_VERSION_1_0 = 0x10000, 41 GLES_VERSION_1_1 = 0x10001, 42 GLES_VERSION_2_0 = 0x20000, 43 GLES_VERSION_3_0 = 0x30000, 44 }; 45 static GlesVersion parseGlesVersion(const char* str); 46 47 EGLContext mEGLContext; 48 void setEGLContext(EGLContext ctxt); 49 50 virtual void bindImageAsFramebuffer(EGLImageKHR image, uint32_t* texName, uint32_t* fbName, uint32_t* status) = 0; 51 virtual void unbindFramebuffer(uint32_t texName, uint32_t fbName) = 0; 52 53 protected: 54 RenderEngine(); 55 virtual ~RenderEngine() = 0; 56 57 public: 58 static RenderEngine* create(EGLDisplay display, EGLConfig config); 59 60 // dump the extension strings. always call the base class. 61 virtual void dump(String8& result); 62 63 // helpers 64 void clearWithColor(float red, float green, float blue, float alpha); 65 void fillRegionWithColor(const Region& region, uint32_t height, 66 float red, float green, float blue, float alpha); 67 68 // common to all GL versions 69 void setScissor(uint32_t left, uint32_t bottom, uint32_t right, uint32_t top); 70 void disableScissor(); 71 void genTextures(size_t count, uint32_t* names); 72 void deleteTextures(size_t count, uint32_t const* names); 73 void readPixels(size_t l, size_t b, size_t w, size_t h, uint32_t* pixels); 74 75 class BindImageAsFramebuffer { 76 RenderEngine& mEngine; 77 uint32_t mTexName, mFbName; 78 uint32_t mStatus; 79 public: 80 BindImageAsFramebuffer(RenderEngine& engine, EGLImageKHR image); 81 ~BindImageAsFramebuffer(); 82 int getStatus() const; 83 }; 84 85 // set-up 86 virtual void checkErrors() const; 87 virtual void setViewportAndProjection(size_t vpw, size_t vph, size_t w, size_t h, bool yswap) = 0; 88 virtual void setupLayerBlending(bool premultipliedAlpha, bool opaque, int alpha) = 0; 89 virtual void setupDimLayerBlending(int alpha) = 0; 90 virtual void setupLayerTexturing(const Texture& texture) = 0; 91 virtual void setupLayerBlackedOut() = 0; 92 virtual void setupFillWithColor(float r, float g, float b, float a) = 0; 93 94 virtual void disableTexturing() = 0; 95 virtual void disableBlending() = 0; 96 97 // drawing 98 virtual void drawMesh(const Mesh& mesh) = 0; 99 100 // grouping 101 // creates a color-transform group, everything drawn in the group will be 102 // transformed by the given color transform when endGroup() is called. 103 virtual void beginGroup(const mat4& colorTransform) = 0; 104 virtual void endGroup() = 0; 105 106 // queries 107 virtual size_t getMaxTextureSize() const = 0; 108 virtual size_t getMaxViewportDims() const = 0; 109 110 EGLContext getEGLContext() const; 111 }; 112 113 // --------------------------------------------------------------------------- 114 }; // namespace android 115 // --------------------------------------------------------------------------- 116 117 #endif /* SF_RENDERENGINE_H_ */ 118