1 /* 2 * Copyright 2016 Google Inc. 3 * 4 * Use of this source code is governed by a BSD-style license that can be 5 * found in the LICENSE file. 6 */ 7 8 #ifndef SKSL_PROGRAM 9 #define SKSL_PROGRAM 10 11 #include <vector> 12 #include <memory> 13 14 #include "SkSLContext.h" 15 #include "SkSLModifiers.h" 16 #include "SkSLProgramElement.h" 17 #include "SkSLSymbolTable.h" 18 19 // name of the render target height uniform 20 #define SKSL_RTHEIGHT_NAME "u_skRTHeight" 21 22 namespace SkSL { 23 24 /** 25 * Represents a fully-digested program, ready for code generation. 26 */ 27 struct Program { 28 struct Settings { 29 const GrShaderCaps* fCaps = nullptr; 30 // if false, sk_FragCoord is exactly the same as gl_FragCoord. If true, the y coordinate 31 // must be flipped. 32 bool fFlipY = false; 33 }; 34 35 struct Inputs { 36 // if true, this program requires the render target height uniform to be defined 37 bool fRTHeight; 38 39 // if true, this program must be recompiled if the flipY setting changes. If false, the 40 // program will compile to the same code regardless of the flipY setting. 41 bool fFlipY; 42 43 void reset() { 44 fRTHeight = false; 45 fFlipY = false; 46 } 47 48 bool isEmpty() { 49 return !fRTHeight && !fFlipY; 50 } 51 }; 52 53 enum Kind { 54 kFragment_Kind, 55 kVertex_Kind, 56 kGeometry_Kind 57 }; 58 59 Program(Kind kind, 60 Settings settings, 61 Modifiers::Flag defaultPrecision, 62 Context* context, 63 std::vector<std::unique_ptr<ProgramElement>> elements, 64 std::shared_ptr<SymbolTable> symbols, 65 Inputs inputs) 66 : fKind(kind) 67 , fSettings(settings) 68 , fDefaultPrecision(defaultPrecision) 69 , fContext(context) 70 , fSymbols(symbols) 71 , fElements(std::move(elements)) 72 , fInputs(inputs) {} 73 74 Kind fKind; 75 Settings fSettings; 76 // FIXME handle different types; currently it assumes this is for floats 77 Modifiers::Flag fDefaultPrecision; 78 Context* fContext; 79 // it's important to keep fElements defined after (and thus destroyed before) fSymbols, 80 // because destroying elements can modify reference counts in symbols 81 std::shared_ptr<SymbolTable> fSymbols; 82 std::vector<std::unique_ptr<ProgramElement>> fElements; 83 Inputs fInputs; 84 }; 85 86 } // namespace 87 88 #endif 89