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_INTERFACEBLOCK 9 #define SKSL_INTERFACEBLOCK 10 11 #include "src/sksl/ir/SkSLProgramElement.h" 12 #include "src/sksl/ir/SkSLSymbolTable.h" 13 #include "src/sksl/ir/SkSLVarDeclarations.h" 14 15 namespace SkSL { 16 17 /** 18 * An interface block, as in: 19 * 20 * out sk_PerVertex { 21 * layout(builtin=0) float4 sk_Position; 22 * layout(builtin=1) float sk_PointSize; 23 * }; 24 * 25 * At the IR level, this is represented by a single variable of struct type. 26 */ 27 struct InterfaceBlock : public ProgramElement { InterfaceBlockInterfaceBlock28 InterfaceBlock(int offset, const Variable* var, String typeName, String instanceName, 29 std::vector<std::unique_ptr<Expression>> sizes, 30 std::shared_ptr<SymbolTable> typeOwner) 31 : INHERITED(offset, kInterfaceBlock_Kind) 32 , fVariable(*var) 33 , fTypeName(std::move(typeName)) 34 , fInstanceName(std::move(instanceName)) 35 , fSizes(std::move(sizes)) 36 , fTypeOwner(typeOwner) {} 37 cloneInterfaceBlock38 std::unique_ptr<ProgramElement> clone() const override { 39 std::vector<std::unique_ptr<Expression>> sizesClone; 40 for (const auto& s : fSizes) { 41 sizesClone.push_back(s->clone()); 42 } 43 return std::unique_ptr<ProgramElement>(new InterfaceBlock(fOffset, &fVariable, fTypeName, 44 fInstanceName, 45 std::move(sizesClone), 46 fTypeOwner)); 47 } 48 descriptionInterfaceBlock49 String description() const override { 50 String result = fVariable.fModifiers.description() + fTypeName + " {\n"; 51 const Type* structType = &fVariable.fType; 52 while (structType->kind() == Type::kArray_Kind) { 53 structType = &structType->componentType(); 54 } 55 for (const auto& f : structType->fields()) { 56 result += f.description() + "\n"; 57 } 58 result += "}"; 59 if (fInstanceName.size()) { 60 result += " " + fInstanceName; 61 for (const auto& size : fSizes) { 62 result += "["; 63 if (size) { 64 result += size->description(); 65 } 66 result += "]"; 67 } 68 } 69 return result + ";"; 70 } 71 72 const Variable& fVariable; 73 const String fTypeName; 74 const String fInstanceName; 75 std::vector<std::unique_ptr<Expression>> fSizes; 76 const std::shared_ptr<SymbolTable> fTypeOwner; 77 78 typedef ProgramElement INHERITED; 79 }; 80 81 } // namespace 82 83 #endif 84