1 /* 2 * Copyright 2017 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_CPPCODEGENERATOR 9 #define SKSL_CPPCODEGENERATOR 10 11 #include "SkSLGLSLCodeGenerator.h" 12 #include "SkSLSectionAndParameterHelper.h" 13 14 #include <set> 15 16 namespace SkSL { 17 18 class CPPCodeGenerator : public GLSLCodeGenerator { 19 public: 20 CPPCodeGenerator(const Context* context, const Program* program, ErrorReporter* errors, 21 String name, OutputStream* out); 22 23 bool generateCode() override; 24 25 private: 26 void writef(const char* s, va_list va) SKSL_PRINTF_LIKE(2, 0); 27 28 void writef(const char* s, ...) SKSL_PRINTF_LIKE(2, 3); 29 30 bool writeSection(const char* name, const char* prefix = ""); 31 32 void writeHeader() override; 33 34 bool usesPrecisionModifiers() const override; 35 36 String getTypeName(const Type& type) override; 37 38 void writeBinaryExpression(const BinaryExpression& b, Precedence parentPrecedence) override; 39 40 void writeIndexExpression(const IndexExpression& i) override; 41 42 void writeIntLiteral(const IntLiteral& i) override; 43 44 void writeSwizzle(const Swizzle& swizzle) override; 45 46 void writeVariableReference(const VariableReference& ref) override; 47 48 String getSamplerHandle(const Variable& var); 49 50 void writeIfStatement(const IfStatement& s) override; 51 52 void writeSwitchStatement(const SwitchStatement& s) override; 53 54 void writeFunctionCall(const FunctionCall& c) override; 55 56 void writeFunction(const FunctionDefinition& f) override; 57 58 void writeSetting(const Setting& s) override; 59 60 void writeProgramElement(const ProgramElement& p) override; 61 62 void addUniform(const Variable& var); 63 64 // writes a printf escape that will be filled in at runtime by the given C++ expression string 65 void writeRuntimeValue(const Type& type, const Layout& layout, const String& cppCode); 66 67 void writeVarInitializer(const Variable& var, const Expression& value) override; 68 69 void writePrivateVars(); 70 71 void writePrivateVarValues(); 72 73 void writeCodeAppend(const String& code); 74 75 bool writeEmitCode(std::vector<const Variable*>& uniforms); 76 77 void writeSetData(std::vector<const Variable*>& uniforms); 78 79 void writeGetKey(); 80 81 void writeClone(); 82 83 void writeTest(); 84 85 String fName; 86 String fFullName; 87 SectionAndParameterHelper fSectionAndParameterHelper; 88 String fExtraEmitCodeCode; 89 std::vector<String> fFormatArgs; 90 std::set<int> fWrittenTransformedCoords; 91 // if true, we are writing a C++ expression instead of a GLSL expression 92 bool fCPPMode = false; 93 94 typedef GLSLCodeGenerator INHERITED; 95 }; 96 97 } 98 99 #endif 100
