| /* |
| * Copyright 2017 Google Inc. |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #ifndef SKSL_CPPCODEGENERATOR |
| #define SKSL_CPPCODEGENERATOR |
| |
| #include "SkSLGLSLCodeGenerator.h" |
| #include "SkSLSectionAndParameterHelper.h" |
| |
| #include <set> |
| |
| namespace SkSL { |
| |
| class CPPCodeGenerator : public GLSLCodeGenerator { |
| public: |
| CPPCodeGenerator(const Context* context, const Program* program, ErrorReporter* errors, |
| String name, OutputStream* out); |
| |
| bool generateCode() override; |
| |
| private: |
| // When inside writeEmitCode(), certain SkSL elements need to control |
| // when fragBuilder->codeAppendf is added to the function block. This |
| // takes all completed statements in the SkSL buffer, and their corresponding |
| // format args, and writes them into the emitCode()'s statement block |
| // using writeCodeAppend(). |
| // |
| // This control is necessary for handling special functions in SkSL, like |
| // process(), which need to intermix the current FP's SkSL with that of |
| // an emitted child. |
| // |
| // :forceAll - If false, only the completed statements (terminated by ;), |
| // will be flushed and the sksl buffer will be set to any partial |
| // statements that remain. If true, everything is flushed, regardless. |
| void flushEmittedCode(bool forceAll = false); |
| |
| void writef(const char* s, va_list va) SKSL_PRINTF_LIKE(2, 0); |
| |
| void writef(const char* s, ...) SKSL_PRINTF_LIKE(2, 3); |
| |
| bool writeSection(const char* name, const char* prefix = ""); |
| |
| void writeHeader() override; |
| |
| bool usesPrecisionModifiers() const override; |
| |
| String getTypeName(const Type& type) override; |
| |
| void writeBinaryExpression(const BinaryExpression& b, Precedence parentPrecedence) override; |
| |
| void writeIndexExpression(const IndexExpression& i) override; |
| |
| void writeIntLiteral(const IntLiteral& i) override; |
| |
| void writeSwizzle(const Swizzle& swizzle) override; |
| |
| void writeVariableReference(const VariableReference& ref) override; |
| |
| String getSamplerHandle(const Variable& var); |
| |
| void writeIfStatement(const IfStatement& s) override; |
| |
| void writeReturnStatement(const ReturnStatement& s) override; |
| |
| void writeSwitchStatement(const SwitchStatement& s) override; |
| |
| void writeFunctionCall(const FunctionCall& c) override; |
| |
| void writeFunction(const FunctionDefinition& f) override; |
| |
| void writeSetting(const Setting& s) override; |
| |
| void writeProgramElement(const ProgramElement& p) override; |
| |
| void addUniform(const Variable& var); |
| |
| // writes a printf escape that will be filled in at runtime by the given C++ expression string |
| void writeRuntimeValue(const Type& type, const Layout& layout, const String& cppCode); |
| |
| void writeVarInitializer(const Variable& var, const Expression& value) override; |
| |
| void writeInputVars() override; |
| |
| void writePrivateVars(); |
| |
| void writePrivateVarValues(); |
| |
| void writeCodeAppend(const String& code); |
| |
| bool writeEmitCode(std::vector<const Variable*>& uniforms); |
| |
| void writeSetData(std::vector<const Variable*>& uniforms); |
| |
| void writeGetKey(); |
| |
| void writeOnTextureSampler(); |
| |
| void writeClone(); |
| |
| void writeTest(); |
| |
| // If the returned C++ is included in the generated code, then the variable |
| // name stored in cppVar will refer to a valid SkString that matches the |
| // Expression. Successful returns leave the output buffer (and related state) |
| // unmodified. |
| // |
| // In the simplest cases, this will return "SkString {cppVar}(\"{e}\");", |
| // while more advanced cases will properly insert format arguments. |
| String convertSKSLExpressionToCPP(const Expression& e, const String& cppVar); |
| |
| String fName; |
| String fFullName; |
| SectionAndParameterHelper fSectionAndParameterHelper; |
| String fExtraEmitCodeCode; |
| std::vector<String> fFormatArgs; |
| std::set<int> fWrittenTransformedCoords; |
| // if true, we are writing a C++ expression instead of a GLSL expression |
| bool fCPPMode = false; |
| bool fInMain = false; |
| |
| // if not null, we are accumulating SkSL for emitCode into fOut, which |
| // replaced the original buffer with a StringStream. The original buffer is |
| // stored here for restoration. |
| OutputStream* fCPPBuffer = nullptr; |
| |
| typedef GLSLCodeGenerator INHERITED; |
| }; |
| |
| } |
| |
| #endif |