diff options
-rw-r--r-- | gn/sksl.gni | 1 | ||||
-rw-r--r-- | src/sksl/SkSLCompiler.cpp | 8 | ||||
-rw-r--r-- | src/sksl/SkSLCompiler.h | 3 | ||||
-rw-r--r-- | src/sksl/SkSLGLSLCodeGenerator.cpp | 2 | ||||
-rw-r--r-- | src/sksl/SkSLIRGenerator.cpp | 1 | ||||
-rw-r--r-- | src/sksl/SkSLMain.cpp | 19 | ||||
-rw-r--r-- | src/sksl/SkSLMetalCodeGenerator.cpp | 1015 | ||||
-rw-r--r-- | src/sksl/SkSLMetalCodeGenerator.h | 222 | ||||
-rw-r--r-- | src/sksl/SkSLString.cpp | 8 | ||||
-rw-r--r-- | src/sksl/SkSLString.h | 4 |
10 files changed, 1279 insertions, 4 deletions
diff --git a/gn/sksl.gni b/gn/sksl.gni index 615b5dcbcc..a50878338c 100644 --- a/gn/sksl.gni +++ b/gn/sksl.gni @@ -15,6 +15,7 @@ skia_sksl_sources = [ "$_src/sksl/SkSLIRGenerator.cpp", "$_src/sksl/SkSLLexer.cpp", "$_src/sksl/SkSLLayoutLexer.cpp", + "$_src/sksl/SkSLMetalCodeGenerator.cpp", "$_src/sksl/SkSLParser.cpp", "$_src/sksl/SkSLSPIRVCodeGenerator.cpp", "$_src/sksl/SkSLString.cpp", diff --git a/src/sksl/SkSLCompiler.cpp b/src/sksl/SkSLCompiler.cpp index 06c43485f4..0b51824f0d 100644 --- a/src/sksl/SkSLCompiler.cpp +++ b/src/sksl/SkSLCompiler.cpp @@ -12,6 +12,7 @@ #include "SkSLGLSLCodeGenerator.h" #include "SkSLHCodeGenerator.h" #include "SkSLIRGenerator.h" +#include "SkSLMetalCodeGenerator.h" #include "SkSLSPIRVCodeGenerator.h" #include "ir/SkSLExpression.h" #include "ir/SkSLExpressionStatement.h" @@ -1235,6 +1236,13 @@ bool Compiler::toGLSL(const Program& program, String* out) { return result; } +bool Compiler::toMetal(const Program& program, OutputStream& out) { + MetalCodeGenerator cg(&fContext, &program, this, &out); + bool result = cg.generateCode(); + this->writeErrorCount(); + return result; +} + bool Compiler::toCPP(const Program& program, String name, OutputStream& out) { fSource = program.fSource.get(); CPPCodeGenerator cg(&fContext, &program, this, name, &out); diff --git a/src/sksl/SkSLCompiler.h b/src/sksl/SkSLCompiler.h index 53cde1a618..ca39c8c659 100644 --- a/src/sksl/SkSLCompiler.h +++ b/src/sksl/SkSLCompiler.h @@ -29,6 +29,7 @@ #define SK_INSTANCEID_BUILTIN 6 #define SK_CLIPDISTANCE_BUILTIN 3 #define SK_INVOCATIONID_BUILTIN 8 +#define SK_POSITION_BUILTIN 0 namespace SkSL { @@ -67,6 +68,8 @@ public: bool toGLSL(const Program& program, String* out); + bool toMetal(const Program& program, OutputStream& out); + bool toCPP(const Program& program, String name, OutputStream& out); bool toH(const Program& program, String name, OutputStream& out); diff --git a/src/sksl/SkSLGLSLCodeGenerator.cpp b/src/sksl/SkSLGLSLCodeGenerator.cpp index 5edb8833bf..22331cdc80 100644 --- a/src/sksl/SkSLGLSLCodeGenerator.cpp +++ b/src/sksl/SkSLGLSLCodeGenerator.cpp @@ -7,8 +7,6 @@ #include "SkSLGLSLCodeGenerator.h" -#include "GLSL.std.450.h" - #include "SkSLCompiler.h" #include "ir/SkSLExpressionStatement.h" #include "ir/SkSLExtension.h" diff --git a/src/sksl/SkSLIRGenerator.cpp b/src/sksl/SkSLIRGenerator.cpp index 7608c420a2..2fb27fcec4 100644 --- a/src/sksl/SkSLIRGenerator.cpp +++ b/src/sksl/SkSLIRGenerator.cpp @@ -1955,7 +1955,6 @@ void IRGenerator::convertProgram(const char* text, Parser parser(text, length, types, fErrors); std::vector<std::unique_ptr<ASTDeclaration>> parsed = parser.file(); if (fErrors.errorCount()) { - printf("float type has name: '%s'\n", fContext.fFloat_Type->name().c_str()); return; } for (size_t i = 0; i < parsed.size(); i++) { diff --git a/src/sksl/SkSLMain.cpp b/src/sksl/SkSLMain.cpp index 9f1fec1f1b..8ba0933f8c 100644 --- a/src/sksl/SkSLMain.cpp +++ b/src/sksl/SkSLMain.cpp @@ -93,6 +93,22 @@ int main(int argc, const char** argv) { printf("error writing '%s'\n", argv[2]); exit(4); } + } else if (name.endsWith(".metal")) { + SkSL::FileOutputStream out(argv[2]); + SkSL::Compiler compiler; + if (!out.isValid()) { + printf("error writing '%s'\n", argv[2]); + exit(4); + } + std::unique_ptr<SkSL::Program> program = compiler.convertProgram(kind, text, settings); + if (!program || !compiler.toMetal(*program, out)) { + printf("%s", compiler.errorText().c_str()); + exit(3); + } + if (!out.close()) { + printf("error writing '%s'\n", argv[2]); + exit(4); + } } else if (name.endsWith(".h")) { SkSL::FileOutputStream out(argv[2]); SkSL::Compiler compiler(SkSL::Compiler::kPermitInvalidStaticTests_Flag); @@ -128,6 +144,7 @@ int main(int argc, const char** argv) { exit(4); } } else { - printf("expected output filename to end with '.spirv', '.glsl', '.cpp', or '.h'"); + printf("expected output filename to end with '.spirv', '.glsl', '.cpp', '.h', or '.metal'"); + exit(1); } } diff --git a/src/sksl/SkSLMetalCodeGenerator.cpp b/src/sksl/SkSLMetalCodeGenerator.cpp new file mode 100644 index 0000000000..de6b1d0854 --- /dev/null +++ b/src/sksl/SkSLMetalCodeGenerator.cpp @@ -0,0 +1,1015 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "SkSLMetalCodeGenerator.h" + +#include "SkSLCompiler.h" +#include "ir/SkSLExpressionStatement.h" +#include "ir/SkSLExtension.h" +#include "ir/SkSLIndexExpression.h" +#include "ir/SkSLModifiersDeclaration.h" +#include "ir/SkSLNop.h" +#include "ir/SkSLVariableReference.h" + +namespace SkSL { + +void MetalCodeGenerator::write(const char* s) { + if (!s[0]) { + return; + } + if (fAtLineStart) { + for (int i = 0; i < fIndentation; i++) { + fOut->writeText(" "); + } + } + fOut->writeText(s); + fAtLineStart = false; +} + +void MetalCodeGenerator::writeLine(const char* s) { + this->write(s); + fOut->writeText(fLineEnding); + fAtLineStart = true; +} + +void MetalCodeGenerator::write(const String& s) { + this->write(s.c_str()); +} + +void MetalCodeGenerator::writeLine(const String& s) { + this->writeLine(s.c_str()); +} + +void MetalCodeGenerator::writeLine() { + this->writeLine(""); +} + +void MetalCodeGenerator::writeExtension(const Extension& ext) { + this->writeLine("#extension " + ext.fName + " : enable"); +} + +void MetalCodeGenerator::writeType(const Type& type) { + switch (type.kind()) { + case Type::kStruct_Kind: + for (const Type* search : fWrittenStructs) { + if (*search == type) { + // already written + this->write(type.name()); + return; + } + } + fWrittenStructs.push_back(&type); + this->writeLine("struct " + type.name() + " {"); + fIndentation++; + for (const auto& f : type.fields()) { + this->writeModifiers(f.fModifiers, false); + // sizes (which must be static in structs) are part of the type name here + this->writeType(*f.fType); + this->writeLine(" " + f.fName + ";"); + } + fIndentation--; + this->write("}"); + break; + case Type::kVector_Kind: + this->writeType(type.componentType()); + this->write(to_string(type.columns())); + break; + default: + this->write(type.name()); + } +} + +void MetalCodeGenerator::writeExpression(const Expression& expr, Precedence parentPrecedence) { + switch (expr.fKind) { + case Expression::kBinary_Kind: + this->writeBinaryExpression((BinaryExpression&) expr, parentPrecedence); + break; + case Expression::kBoolLiteral_Kind: + this->writeBoolLiteral((BoolLiteral&) expr); + break; + case Expression::kConstructor_Kind: + this->writeConstructor((Constructor&) expr); + break; + case Expression::kIntLiteral_Kind: + this->writeIntLiteral((IntLiteral&) expr); + break; + case Expression::kFieldAccess_Kind: + this->writeFieldAccess(((FieldAccess&) expr)); + break; + case Expression::kFloatLiteral_Kind: + this->writeFloatLiteral(((FloatLiteral&) expr)); + break; + case Expression::kFunctionCall_Kind: + this->writeFunctionCall((FunctionCall&) expr); + break; + case Expression::kPrefix_Kind: + this->writePrefixExpression((PrefixExpression&) expr, parentPrecedence); + break; + case Expression::kPostfix_Kind: + this->writePostfixExpression((PostfixExpression&) expr, parentPrecedence); + break; + case Expression::kSetting_Kind: + this->writeSetting((Setting&) expr); + break; + case Expression::kSwizzle_Kind: + this->writeSwizzle((Swizzle&) expr); + break; + case Expression::kVariableReference_Kind: + this->writeVariableReference((VariableReference&) expr); + break; + case Expression::kTernary_Kind: + this->writeTernaryExpression((TernaryExpression&) expr, parentPrecedence); + break; + case Expression::kIndex_Kind: + this->writeIndexExpression((IndexExpression&) expr); + break; + default: + ABORT("unsupported expression: %s", expr.description().c_str()); + } +} + +void MetalCodeGenerator::writeFunctionCall(const FunctionCall& c) { + if (c.fFunction.fBuiltin && "atan" == c.fFunction.fName && 2 == c.fArguments.size()) { + this->write("atan2"); + } else { + this->write(c.fFunction.fName); + } + this->write("("); + const char* separator = ""; + if (this->requirements(c.fFunction) & kInputs_Requirement) { + this->write("_in"); + separator = ", "; + } + if (this->requirements(c.fFunction) & kOutputs_Requirement) { + this->write(separator); + this->write("_out"); + separator = ", "; + } + if (this->requirements(c.fFunction) & kUniforms_Requirement) { + this->write(separator); + this->write("_uniforms"); + separator = ", "; + } + for (size_t i = 0; i < c.fArguments.size(); ++i) { + const Expression& arg = *c.fArguments[i]; + this->write(separator); + separator = ", "; + if (c.fFunction.fParameters[i]->fModifiers.fFlags & Modifiers::kOut_Flag) { + this->write("&"); + } + this->writeExpression(arg, kSequence_Precedence); + } + this->write(")"); +} + +void MetalCodeGenerator::writeConstructor(const Constructor& c) { + this->writeType(c.fType); + this->write("("); + const char* separator = ""; + int scalarCount = 0; + for (const auto& arg : c.fArguments) { + this->write(separator); + separator = ", "; + if (Type::kMatrix_Kind == c.fType.kind() && Type::kScalar_Kind == arg->fType.kind()) { + // float2x2(float, float, float, float) doesn't work in Metal 1, so we need to merge to + // float2x2(float2, float2). + if (!scalarCount) { + this->writeType(c.fType.componentType()); + this->write(to_string(c.fType.rows())); + this->write("("); + } + ++scalarCount; + } + this->writeExpression(*arg, kSequence_Precedence); + if (scalarCount && scalarCount == c.fType.rows()) { + this->write(")"); + scalarCount = 0; + } + } + this->write(")"); +} + +void MetalCodeGenerator::writeFragCoord() { + this->write("_in.position"); +} + +void MetalCodeGenerator::writeVariableReference(const VariableReference& ref) { + switch (ref.fVariable.fModifiers.fLayout.fBuiltin) { + case SK_FRAGCOLOR_BUILTIN: + this->write("sk_FragColor"); + break; + default: + if (Variable::kGlobal_Storage == ref.fVariable.fStorage) { + if (ref.fVariable.fModifiers.fFlags & Modifiers::kIn_Flag) { + this->write("_in."); + } else if (ref.fVariable.fModifiers.fFlags & Modifiers::kOut_Flag) { + this->write("_out."); + } else if (ref.fVariable.fModifiers.fFlags & Modifiers::kUniform_Flag) { + this->write("_uniforms."); + } else { + fErrors.error(ref.fVariable.fOffset, "Metal backend does not support global " + "variables"); + } + } + this->write(ref.fVariable.fName); + } +} + +void MetalCodeGenerator::writeIndexExpression(const IndexExpression& expr) { + this->writeExpression(*expr.fBase, kPostfix_Precedence); + this->write("["); + this->writeExpression(*expr.fIndex, kTopLevel_Precedence); + this->write("]"); +} + +void MetalCodeGenerator::writeFieldAccess(const FieldAccess& f) { + if (FieldAccess::kDefault_OwnerKind == f.fOwnerKind) { + this->writeExpression(*f.fBase, kPostfix_Precedence); + this->write("."); + } + switch (f.fBase->fType.fields()[f.fFieldIndex].fModifiers.fLayout.fBuiltin) { + case SK_CLIPDISTANCE_BUILTIN: + this->write("gl_ClipDistance"); + break; + case SK_POSITION_BUILTIN: + this->write("_out.position"); + break; + default: + this->write(f.fBase->fType.fields()[f.fFieldIndex].fName); + } +} + +void MetalCodeGenerator::writeSwizzle(const Swizzle& swizzle) { + this->writeExpression(*swizzle.fBase, kPostfix_Precedence); + this->write("."); + for (int c : swizzle.fComponents) { + this->write(&("x\0y\0z\0w\0"[c * 2])); + } +} + +MetalCodeGenerator::Precedence MetalCodeGenerator::GetBinaryPrecedence(Token::Kind op) { + switch (op) { + case Token::STAR: // fall through + case Token::SLASH: // fall through + case Token::PERCENT: return MetalCodeGenerator::kMultiplicative_Precedence; + case Token::PLUS: // fall through + case Token::MINUS: return MetalCodeGenerator::kAdditive_Precedence; + case Token::SHL: // fall through + case Token::SHR: return MetalCodeGenerator::kShift_Precedence; + case Token::LT: // fall through + case Token::GT: // fall through + case Token::LTEQ: // fall through + case Token::GTEQ: return MetalCodeGenerator::kRelational_Precedence; + case Token::EQEQ: // fall through + case Token::NEQ: return MetalCodeGenerator::kEquality_Precedence; + case Token::BITWISEAND: return MetalCodeGenerator::kBitwiseAnd_Precedence; + case Token::BITWISEXOR: return MetalCodeGenerator::kBitwiseXor_Precedence; + case Token::BITWISEOR: return MetalCodeGenerator::kBitwiseOr_Precedence; + case Token::LOGICALAND: return MetalCodeGenerator::kLogicalAnd_Precedence; + case Token::LOGICALXOR: return MetalCodeGenerator::kLogicalXor_Precedence; + case Token::LOGICALOR: return MetalCodeGenerator::kLogicalOr_Precedence; + case Token::EQ: // fall through + case Token::PLUSEQ: // fall through + case Token::MINUSEQ: // fall through + case Token::STAREQ: // fall through + case Token::SLASHEQ: // fall through + case Token::PERCENTEQ: // fall through + case Token::SHLEQ: // fall through + case Token::SHREQ: // fall through + case Token::LOGICALANDEQ: // fall through + case Token::LOGICALXOREQ: // fall through + case Token::LOGICALOREQ: // fall through + case Token::BITWISEANDEQ: // fall through + case Token::BITWISEXOREQ: // fall through + case Token::BITWISEOREQ: return MetalCodeGenerator::kAssignment_Precedence; + case Token::COMMA: return MetalCodeGenerator::kSequence_Precedence; + default: ABORT("unsupported binary operator"); + } +} + +void MetalCodeGenerator::writeBinaryExpression(const BinaryExpression& b, + Precedence parentPrecedence) { + Precedence precedence = GetBinaryPrecedence(b.fOperator); + if (precedence >= parentPrecedence) { + this->write("("); + } + if (Compiler::IsAssignment(b.fOperator) && + Expression::kVariableReference_Kind == b.fLeft->fKind && + Variable::kParameter_Storage == ((VariableReference&) *b.fLeft).fVariable.fStorage && + (((VariableReference&) *b.fLeft).fVariable.fModifiers.fFlags & Modifiers::kOut_Flag)) { + // writing to an out parameter. Since we have to turn those into pointers, we have to + // dereference it here. + this->write("*"); + } + this->writeExpression(*b.fLeft, precedence); + if (b.fOperator != Token::EQ && Compiler::IsAssignment(b.fOperator) && + Expression::kSwizzle_Kind == b.fLeft->fKind && !b.fLeft->hasSideEffects()) { + // This doesn't compile in Metal: + // float4 x = float4(1); + // x.xy *= float2x2(...); + // with the error message "non-const reference cannot bind to vector element", + // but switching it to x.xy = x.xy * float2x2(...) fixes it. We perform this tranformation + // as long as the LHS has no side effects, and hope for the best otherwise. + this->write(" = "); + this->writeExpression(*b.fLeft, kAssignment_Precedence); + this->write(" "); + String op = Compiler::OperatorName(b.fOperator); + ASSERT(op.endsWith("=")); + this->write(op.substr(0, op.size() - 1).c_str()); + this->write(" "); + } else { + this->write(String(" ") + Compiler::OperatorName(b.fOperator) + " "); + } + this->writeExpression(*b.fRight, precedence); + if (precedence >= parentPrecedence) { + this->write(")"); + } +} + +void MetalCodeGenerator::writeTernaryExpression(const TernaryExpression& t, + Precedence parentPrecedence) { + if (kTernary_Precedence >= parentPrecedence) { + this->write("("); + } + this->writeExpression(*t.fTest, kTernary_Precedence); + this->write(" ? "); + this->writeExpression(*t.fIfTrue, kTernary_Precedence); + this->write(" : "); + this->writeExpression(*t.fIfFalse, kTernary_Precedence); + if (kTernary_Precedence >= parentPrecedence) { + this->write(")"); + } +} + +void MetalCodeGenerator::writePrefixExpression(const PrefixExpression& p, + Precedence parentPrecedence) { + if (kPrefix_Precedence >= parentPrecedence) { + this->write("("); + } + this->write(Compiler::OperatorName(p.fOperator)); + this->writeExpression(*p.fOperand, kPrefix_Precedence); + if (kPrefix_Precedence >= parentPrecedence) { + this->write(")"); + } +} + +void MetalCodeGenerator::writePostfixExpression(const PostfixExpression& p, + Precedence parentPrecedence) { + if (kPostfix_Precedence >= parentPrecedence) { + this->write("("); + } + this->writeExpression(*p.fOperand, kPostfix_Precedence); + this->write(Compiler::OperatorName(p.fOperator)); + if (kPostfix_Precedence >= parentPrecedence) { + this->write(")"); + } +} + +void MetalCodeGenerator::writeBoolLiteral(const BoolLiteral& b) { + this->write(b.fValue ? "true" : "false"); +} + +void MetalCodeGenerator::writeIntLiteral(const IntLiteral& i) { + if (i.fType == *fContext.fUInt_Type) { + this->write(to_string(i.fValue & 0xffffffff) + "u"); + } else { + this->write(to_string((int32_t) i.fValue)); + } +} + +void MetalCodeGenerator::writeFloatLiteral(const FloatLiteral& f) { + this->write(to_string(f.fValue)); +} + +void MetalCodeGenerator::writeSetting(const Setting& s) { + ABORT("internal error; setting was not folded to a constant during compilation\n"); +} + +void MetalCodeGenerator::writeFunction(const FunctionDefinition& f) { + const char* separator = ""; + if ("main" == f.fDeclaration.fName) { + switch (fProgram.fKind) { + case Program::kFragment_Kind: + this->write("fragment half4 _frag"); + break; + case Program::kVertex_Kind: + this->write("vertex Outputs _vert"); + break; + default: + ASSERT(false); + } + this->write("(Inputs _in [[stage_in]]"); + if (-1 != fUniformBuffer) { + this->write(", constant Uniforms& _uniforms [[buffer(" + + to_string(fUniformBuffer) + ")]]"); + } + separator = ", "; + } else { + this->writeType(f.fDeclaration.fReturnType); + this->write(" " + f.fDeclaration.fName + "("); + if (this->requirements(f.fDeclaration) & kInputs_Requirement) { + this->write("Inputs _in"); + separator = ", "; + } + if (this->requirements(f.fDeclaration) & kOutputs_Requirement) { + this->write(separator); + this->write("thread Outputs& _out"); + separator = ", "; + } + if (this->requirements(f.fDeclaration) & kUniforms_Requirement) { + this->write(separator); + this->write("Uniforms _uniforms"); + separator = ", "; + } + } + for (const auto& param : f.fDeclaration.fParameters) { + this->write(separator); + separator = ", "; + this->writeModifiers(param->fModifiers, false); + std::vector<int> sizes; + const Type* type = ¶m->fType; + while (Type::kArray_Kind == type->kind()) { + sizes.push_back(type->columns()); + type = &type->componentType(); + } + this->writeType(*type); + if (param->fModifiers.fFlags & Modifiers::kOut_Flag) { + this->write("*"); + } + this->write(" " + param->fName); + for (int s : sizes) { + if (s <= 0) { + this->write("[]"); + } else { + this->write("[" + to_string(s) + "]"); + } + } + } + this->writeLine(") {"); + + if ("main" == f.fDeclaration.fName) { + switch (fProgram.fKind) { + case Program::kFragment_Kind: + this->writeLine(" half4 sk_FragColor;"); + break; + case Program::kVertex_Kind: + this->writeLine(" Outputs _out;"); + break; + default: + ASSERT(false); + } + } + fFunctionHeader = ""; + OutputStream* oldOut = fOut; + StringStream buffer; + fOut = &buffer; + fIndentation++; + this->writeStatements(((Block&) *f.fBody).fStatements); + if ("main" == f.fDeclaration.fName) { + switch (fProgram.fKind) { + case Program::kFragment_Kind: + this->writeLine("return sk_FragColor;"); + break; + case Program::kVertex_Kind: + this->writeLine("return _out;"); + break; + default: + ASSERT(false); + } + } + fIndentation--; + this->writeLine("}"); + + fOut = oldOut; + this->write(fFunctionHeader); + this->write(buffer.str()); +} + +void MetalCodeGenerator::writeModifiers(const Modifiers& modifiers, + bool globalContext) { + if (modifiers.fFlags & Modifiers::kOut_Flag) { + this->write("thread "); + } + if (modifiers.fFlags & Modifiers::kConst_Flag) { + this->write("const "); + } +} + +void MetalCodeGenerator::writeInterfaceBlock(const InterfaceBlock& intf) { + if ("sk_PerVertex" == intf.fTypeName) { + return; + } + this->writeModifiers(intf.fVariable.fModifiers, true); + this->writeLine(intf.fTypeName + " {"); + fIndentation++; + const Type* structType = &intf.fVariable.fType; + while (Type::kArray_Kind == structType->kind()) { + structType = &structType->componentType(); + } + for (const auto& f : structType->fields()) { + this->writeModifiers(f.fModifiers, false); + this->writeType(*f.fType); + this->writeLine(" " + f.fName + ";"); + } + fIndentation--; + this->write("}"); + if (intf.fInstanceName.size()) { + this->write(" "); + this->write(intf.fInstanceName); + for (const auto& size : intf.fSizes) { + this->write("["); + if (size) { + this->writeExpression(*size, kTopLevel_Precedence); + } + this->write("]"); + } + } + this->writeLine(";"); +} + +void MetalCodeGenerator::writeVarInitializer(const Variable& var, const Expression& value) { + this->writeExpression(value, kTopLevel_Precedence); +} + +void MetalCodeGenerator::writeVarDeclarations(const VarDeclarations& decl, bool global) { + ASSERT(decl.fVars.size() > 0); + bool wroteType = false; + for (const auto& stmt : decl.fVars) { + VarDeclaration& var = (VarDeclaration&) *stmt; + if (var.fVar->fModifiers.fFlags & (Modifiers::kIn_Flag | Modifiers::kOut_Flag | + Modifiers::kUniform_Flag)) { + ASSERT(global); + continue; + } + if (wroteType) { + this->write(", "); + } else { + this->writeModifiers(var.fVar->fModifiers, global); + this->writeType(decl.fBaseType); + this->write(" "); + wroteType = true; + } + this->write(var.fVar->fName); + for (const auto& size : var.fSizes) { + this->write("["); + if (size) { + this->writeExpression(*size, kTopLevel_Precedence); + } + this->write("]"); + } + if (var.fValue) { + this->write(" = "); + this->writeVarInitializer(*var.fVar, *var.fValue); + } + if (!fFoundImageDecl && var.fVar->fType == *fContext.fImage2D_Type) { + if (fProgram.fSettings.fCaps->imageLoadStoreExtensionString()) { + fHeader.writeText("#extension "); + fHeader.writeText(fProgram.fSettings.fCaps->imageLoadStoreExtensionString()); + fHeader.writeText(" : require\n"); + } + fFoundImageDecl = true; + } + } + if (wroteType) { + this->write(";"); + } +} + +void MetalCodeGenerator::writeStatement(const Statement& s) { + switch (s.fKind) { + case Statement::kBlock_Kind: + this->writeBlock((Block&) s); + break; + case Statement::kExpression_Kind: + this->writeExpression(*((ExpressionStatement&) s).fExpression, kTopLevel_Precedence); + this->write(";"); + break; + case Statement::kReturn_Kind: + this->writeReturnStatement((ReturnStatement&) s); + break; + case Statement::kVarDeclarations_Kind: + this->writeVarDeclarations(*((VarDeclarationsStatement&) s).fDeclaration, false); + break; + case Statement::kIf_Kind: + this->writeIfStatement((IfStatement&) s); + break; + case Statement::kFor_Kind: + this->writeForStatement((ForStatement&) s); + break; + case Statement::kWhile_Kind: + this->writeWhileStatement((WhileStatement&) s); + break; + case Statement::kDo_Kind: + this->writeDoStatement((DoStatement&) s); + break; + case Statement::kSwitch_Kind: + this->writeSwitchStatement((SwitchStatement&) s); + break; + case Statement::kBreak_Kind: + this->write("break;"); + break; + case Statement::kContinue_Kind: + this->write("continue;"); + break; + case Statement::kDiscard_Kind: + this->write("discard;"); + break; + case Statement::kNop_Kind: + this->write(";"); + break; + default: + ABORT("unsupported statement: %s", s.description().c_str()); + } +} + +void MetalCodeGenerator::writeStatements(const std::vector<std::unique_ptr<Statement>>& statements) { + for (const auto& s : statements) { + if (!s->isEmpty()) { + this->writeStatement(*s); + this->writeLine(); + } + } +} + +void MetalCodeGenerator::writeBlock(const Block& b) { + this->writeLine("{"); + fIndentation++; + this->writeStatements(b.fStatements); + fIndentation--; + this->write("}"); +} + +void MetalCodeGenerator::writeIfStatement(const IfStatement& stmt) { + this->write("if ("); + this->writeExpression(*stmt.fTest, kTopLevel_Precedence); + this->write(") "); + this->writeStatement(*stmt.fIfTrue); + if (stmt.fIfFalse) { + this->write(" else "); + this->writeStatement(*stmt.fIfFalse); + } +} + +void MetalCodeGenerator::writeForStatement(const ForStatement& f) { + this->write("for ("); + if (f.fInitializer && !f.fInitializer->isEmpty()) { + this->writeStatement(*f.fInitializer); + } else { + this->write("; "); + } + if (f.fTest) { + this->writeExpression(*f.fTest, kTopLevel_Precedence); + } + this->write("; "); + if (f.fNext) { + this->writeExpression(*f.fNext, kTopLevel_Precedence); + } + this->write(") "); + this->writeStatement(*f.fStatement); +} + +void MetalCodeGenerator::writeWhileStatement(const WhileStatement& w) { + this->write("while ("); + this->writeExpression(*w.fTest, kTopLevel_Precedence); + this->write(") "); + this->writeStatement(*w.fStatement); +} + +void MetalCodeGenerator::writeDoStatement(const DoStatement& d) { + this->write("do "); + this->writeStatement(*d.fStatement); + this->write(" while ("); + this->writeExpression(*d.fTest, kTopLevel_Precedence); + this->write(");"); +} + +void MetalCodeGenerator::writeSwitchStatement(const SwitchStatement& s) { + this->write("switch ("); + this->writeExpression(*s.fValue, kTopLevel_Precedence); + this->writeLine(") {"); + fIndentation++; + for (const auto& c : s.fCases) { + if (c->fValue) { + this->write("case "); + this->writeExpression(*c->fValue, kTopLevel_Precedence); + this->writeLine(":"); + } else { + this->writeLine("default:"); + } + fIndentation++; + for (const auto& stmt : c->fStatements) { + this->writeStatement(*stmt); + this->writeLine(); + } + fIndentation--; + } + fIndentation--; + this->write("}"); +} + +void MetalCodeGenerator::writeReturnStatement(const ReturnStatement& r) { + this->write("return"); + if (r.fExpression) { + this->write(" "); + this->writeExpression(*r.fExpression, kTopLevel_Precedence); + } + this->write(";"); +} + +void MetalCodeGenerator::writeHeader() { + this->write("#include <metal_stdlib>\n"); + this->write("#include <simd/simd.h>\n"); + this->write("using namespace metal;\n"); +} + +void MetalCodeGenerator::writeUniformStruct() { + for (const auto& e : fProgram.fElements) { + if (ProgramElement::kVar_Kind == e->fKind) { + VarDeclarations& decls = (VarDeclarations&) *e; + if (!decls.fVars.size()) { + continue; + } + const Variable& first = *((VarDeclaration&) *decls.fVars[0]).fVar; + if (first.fModifiers.fFlags & Modifiers::kUniform_Flag) { + if (-1 == fUniformBuffer) { + this->write("struct Uniforms {\n"); + fUniformBuffer = first.fModifiers.fLayout.fSet; + if (-1 == fUniformBuffer) { + fErrors.error(decls.fOffset, "Metal uniforms must have 'layout(set=...)'"); + } + } else if (first.fModifiers.fLayout.fSet != fUniformBuffer) { + if (-1 == fUniformBuffer) { + fErrors.error(decls.fOffset, "Metal backend requires all uniforms to have " + "the same 'layout(set=...)'"); + } + } + this->write(" "); + this->writeType(first.fType); + this->write(" "); + for (const auto& stmt : decls.fVars) { + VarDeclaration& var = (VarDeclaration&) *stmt; + this->write(var.fVar->fName); + } + this->write(";\n"); + } + } + } + if (-1 != fUniformBuffer) { + this->write("};\n"); + } +} + +void MetalCodeGenerator::writeInputStruct() { + this->write("struct Inputs {\n"); + if (Program::kFragment_Kind == fProgram.fKind) { + this->write(" float4 position [[position]];\n"); + } + for (const auto& e : fProgram.fElements) { + if (ProgramElement::kVar_Kind == e->fKind) { + VarDeclarations& decls = (VarDeclarations&) *e; + if (!decls.fVars.size()) { + continue; + } + const Variable& first = *((VarDeclaration&) *decls.fVars[0]).fVar; + if (first.fModifiers.fFlags & Modifiers::kIn_Flag && + -1 == first.fModifiers.fLayout.fBuiltin) { + this->write(" "); + this->writeType(first.fType); + this->write(" "); + for (const auto& stmt : decls.fVars) { + VarDeclaration& var = (VarDeclaration&) *stmt; + this->write(var.fVar->fName); + if (-1 != var.fVar->fModifiers.fLayout.fLocation) { + this->write(" [[attribute(" + + to_string(var.fVar->fModifiers.fLayout.fLocation) + ")]]"); + } + } + this->write(";\n"); + } + } + } + this->write("};\n"); +} + +void MetalCodeGenerator::writeOutputStruct() { + this->write("struct Outputs {\n"); + this->write(" float4 position [[position]];\n"); + for (const auto& e : fProgram.fElements) { + if (ProgramElement::kVar_Kind == e->fKind) { + VarDeclarations& decls = (VarDeclarations&) *e; + if (!decls.fVars.size()) { + continue; + } + const Variable& first = *((VarDeclaration&) *decls.fVars[0]).fVar; + if (first.fModifiers.fFlags & Modifiers::kOut_Flag && + -1 == first.fModifiers.fLayout.fBuiltin) { + this->write(" "); + this->writeType(first.fType); + this->write(" "); + for (const auto& stmt : decls.fVars) { + VarDeclaration& var = (VarDeclaration&) *stmt; + this->write(var.fVar->fName); + } + this->write(";\n"); + } + } + } this->write("};\n"); +} + +void MetalCodeGenerator::writeProgramElement(const ProgramElement& e) { + switch (e.fKind) { + case ProgramElement::kExtension_Kind: + break; + case ProgramElement::kVar_Kind: { + VarDeclarations& decl = (VarDeclarations&) e; + if (decl.fVars.size() > 0) { + int builtin = ((VarDeclaration&) *decl.fVars[0]).fVar->fModifiers.fLayout.fBuiltin; + if (-1 == builtin) { + // normal var + this->writeVarDeclarations(decl, true); + this->writeLine(); + } else if (SK_FRAGCOLOR_BUILTIN == builtin) { + // ignore + } + } + break; + } + case ProgramElement::kInterfaceBlock_Kind: + this->writeInterfaceBlock((InterfaceBlock&) e); + break; + case ProgramElement::kFunction_Kind: + this->writeFunction((FunctionDefinition&) e); + break; + case ProgramElement::kModifiers_Kind: + this->writeModifiers(((ModifiersDeclaration&) e).fModifiers, true); + this->writeLine(";"); + break; + default: + printf("%s\n", e.description().c_str()); + ABORT("unsupported program element"); + } +} + +MetalCodeGenerator::Requirements MetalCodeGenerator::requirements(const Expression& e) { + switch (e.fKind) { + case Expression::kFunctionCall_Kind: { + const FunctionCall& f = (const FunctionCall&) e; + Requirements result = this->requirements(f.fFunction); + for (const auto& e : f.fArguments) { + result |= this->requirements(*e); + } + return result; + } + case Expression::kConstructor_Kind: { + const Constructor& c = (const Constructor&) e; + Requirements result = kNo_Requirements; + for (const auto& e : c.fArguments) { + result |= this->requirements(*e); + } + return result; + } + case Expression::kFieldAccess_Kind: + return this->requirements(*((const FieldAccess&) e).fBase); + case Expression::kSwizzle_Kind: + return this->requirements(*((const Swizzle&) e).fBase); + case Expression::kBinary_Kind: { + const BinaryExpression& b = (const BinaryExpression&) e; + return this->requirements(*b.fLeft) | this->requirements(*b.fRight); + } + case Expression::kIndex_Kind: { + const IndexExpression& idx = (const IndexExpression&) e; + return this->requirements(*idx.fBase) | this->requirements(*idx.fIndex); + } + case Expression::kPrefix_Kind: + return this->requirements(*((const PrefixExpression&) e).fOperand); + case Expression::kPostfix_Kind: + return this->requirements(*((const PostfixExpression&) e).fOperand); + case Expression::kTernary_Kind: { + const TernaryExpression& t = (const TernaryExpression&) e; + return this->requirements(*t.fTest) | this->requirements(*t.fIfTrue) | + this->requirements(*t.fIfFalse); + } + case Expression::kVariableReference_Kind: { + const VariableReference& v = (const VariableReference&) e; + Requirements result = kNo_Requirements; + if (v.fVariable.fModifiers.fLayout.fBuiltin == SK_FRAGCOORD_BUILTIN) { + result = kInputs_Requirement; + } else if (Variable::kGlobal_Storage == v.fVariable.fStorage) { + if (v.fVariable.fModifiers.fFlags & Modifiers::kIn_Flag) { + result = kInputs_Requirement; + } else if (v.fVariable.fModifiers.fFlags & Modifiers::kOut_Flag) { + result = kOutputs_Requirement; + } else if (v.fVariable.fModifiers.fFlags & Modifiers::kUniform_Flag) { + result = kUniforms_Requirement; + } + } + return result; + } + default: + return kNo_Requirements; + } +} + +MetalCodeGenerator::Requirements MetalCodeGenerator::requirements(const Statement& s) { + switch (s.fKind) { + case Statement::kBlock_Kind: { + Requirements result = kNo_Requirements; + for (const auto& child : ((const Block&) s).fStatements) { + result |= this->requirements(*child); + } + return result; + } + case Statement::kExpression_Kind: + return this->requirements(*((const ExpressionStatement&) s).fExpression); + case Statement::kReturn_Kind: { + const ReturnStatement& r = (const ReturnStatement&) s; + if (r.fExpression) { + return this->requirements(*r.fExpression); + } + return kNo_Requirements; + } + case Statement::kIf_Kind: { + const IfStatement& i = (const IfStatement&) s; + return this->requirements(*i.fTest) | + this->requirements(*i.fIfTrue) | + (i.fIfFalse && this->requirements(*i.fIfFalse)); + } + case Statement::kFor_Kind: { + const ForStatement& f = (const ForStatement&) s; + return this->requirements(*f.fInitializer) | + this->requirements(*f.fTest) | + this->requirements(*f.fNext) | + this->requirements(*f.fStatement); + } + case Statement::kWhile_Kind: { + const WhileStatement& w = (const WhileStatement&) s; + return this->requirements(*w.fTest) | + this->requirements(*w.fStatement); + } + case Statement::kDo_Kind: { + const DoStatement& d = (const DoStatement&) s; + return this->requirements(*d.fTest) | + this->requirements(*d.fStatement); + } + case Statement::kSwitch_Kind: { + const SwitchStatement& sw = (const SwitchStatement&) s; + Requirements result = this->requirements(*sw.fValue); + for (const auto& c : sw.fCases) { + for (const auto& st : c->fStatements) { + result |= this->requirements(*st); + } + } + return result; + } + default: + return kNo_Requirements; + } +} + +MetalCodeGenerator::Requirements MetalCodeGenerator::requirements(const FunctionDeclaration& f) { + if (f.fBuiltin) { + return kNo_Requirements; + } + auto found = fRequirements.find(&f); + if (found == fRequirements.end()) { + for (const auto& e : fProgram.fElements) { + if (ProgramElement::kFunction_Kind == e->fKind) { + const FunctionDefinition& def = (const FunctionDefinition&) *e; + if (&def.fDeclaration == &f) { + Requirements reqs = this->requirements(*def.fBody); + fRequirements[&f] = reqs; + return reqs; + } + } + } + } + return found->second; +} + +bool MetalCodeGenerator::generateCode() { + OutputStream* rawOut = fOut; + fOut = &fHeader; + fProgramKind = fProgram.fKind; + this->writeHeader(); + this->writeUniformStruct(); + this->writeInputStruct(); + if (Program::kVertex_Kind == fProgram.fKind) { + this->writeOutputStruct(); + } + StringStream body; + fOut = &body; + for (const auto& e : fProgram.fElements) { + this->writeProgramElement(*e); + } + fOut = rawOut; + + write_stringstream(fHeader, *rawOut); + write_stringstream(body, *rawOut); + return true; +} + +} diff --git a/src/sksl/SkSLMetalCodeGenerator.h b/src/sksl/SkSLMetalCodeGenerator.h new file mode 100644 index 0000000000..3eccbf0909 --- /dev/null +++ b/src/sksl/SkSLMetalCodeGenerator.h @@ -0,0 +1,222 @@ +/* + * Copyright 2016 Google Inc. + * + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#ifndef SKSL_METALCODEGENERATOR +#define SKSL_METALCODEGENERATOR + +#include <stack> +#include <tuple> +#include <unordered_map> + +#include "SkSLCodeGenerator.h" +#include "SkSLStringStream.h" +#include "ir/SkSLBinaryExpression.h" +#include "ir/SkSLBoolLiteral.h" +#include "ir/SkSLConstructor.h" +#include "ir/SkSLDoStatement.h" +#include "ir/SkSLExtension.h" +#include "ir/SkSLFloatLiteral.h" +#include "ir/SkSLIfStatement.h" +#include "ir/SkSLIndexExpression.h" +#include "ir/SkSLInterfaceBlock.h" +#include "ir/SkSLIntLiteral.h" +#include "ir/SkSLFieldAccess.h" +#include "ir/SkSLForStatement.h" +#include "ir/SkSLFunctionCall.h" +#include "ir/SkSLFunctionDeclaration.h" +#include "ir/SkSLFunctionDefinition.h" +#include "ir/SkSLPrefixExpression.h" +#include "ir/SkSLPostfixExpression.h" +#include "ir/SkSLProgramElement.h" +#include "ir/SkSLReturnStatement.h" +#include "ir/SkSLSetting.h" +#include "ir/SkSLStatement.h" +#include "ir/SkSLSwitchStatement.h" +#include "ir/SkSLSwizzle.h" +#include "ir/SkSLTernaryExpression.h" +#include "ir/SkSLVarDeclarations.h" +#include "ir/SkSLVarDeclarationsStatement.h" +#include "ir/SkSLVariableReference.h" +#include "ir/SkSLWhileStatement.h" + +namespace SkSL { + +#define kLast_Capability SpvCapabilityMultiViewport + +/** + * Converts a Program into Metal code. + */ +class MetalCodeGenerator : public CodeGenerator { +public: + enum Precedence { + kParentheses_Precedence = 1, + kPostfix_Precedence = 2, + kPrefix_Precedence = 3, + kMultiplicative_Precedence = 4, + kAdditive_Precedence = 5, + kShift_Precedence = 6, + kRelational_Precedence = 7, + kEquality_Precedence = 8, + kBitwiseAnd_Precedence = 9, + kBitwiseXor_Precedence = 10, + kBitwiseOr_Precedence = 11, + kLogicalAnd_Precedence = 12, + kLogicalXor_Precedence = 13, + kLogicalOr_Precedence = 14, + kTernary_Precedence = 15, + kAssignment_Precedence = 16, + kSequence_Precedence = 17, + kTopLevel_Precedence = kSequence_Precedence + }; + + MetalCodeGenerator(const Context* context, const Program* program, ErrorReporter* errors, + OutputStream* out) + : INHERITED(program, errors, out) + , fLineEnding("\n") + , fContext(*context) {} + + bool generateCode() override; + +protected: + typedef int Requirements; + static constexpr Requirements kNo_Requirements = 0; + static constexpr Requirements kInputs_Requirement = 1 << 0; + static constexpr Requirements kOutputs_Requirement = 1 << 1; + static constexpr Requirements kUniforms_Requirement = 1 << 2; + + void write(const char* s); + + void writeLine(); + + void writeLine(const char* s); + + void write(const String& s); + + void writeLine(const String& s); + + void writeHeader(); + + void writeUniformStruct(); + + void writeInputStruct(); + + void writeOutputStruct(); + + void writePrecisionModifier(); + + void writeType(const Type& type); + + void writeExtension(const Extension& ext); + + void writeInterfaceBlock(const InterfaceBlock& intf); + + void writeFunctionStart(const FunctionDeclaration& f); + + void writeFunctionDeclaration(const FunctionDeclaration& f); + + void writeFunction(const FunctionDefinition& f); + + void writeLayout(const Layout& layout); + + void writeModifiers(const Modifiers& modifiers, bool globalContext); + + void writeGlobalVars(const VarDeclaration& vs); + + void writeVarInitializer(const Variable& var, const Expression& value); + + void writeVarDeclarations(const VarDeclarations& decl, bool global); + + void writeFragCoord(); + + void writeVariableReference(const VariableReference& ref); + + void writeExpression(const Expression& expr, Precedence parentPrecedence); + + void writeIntrinsicCall(const FunctionCall& c); + + void writeMinAbsHack(Expression& absExpr, Expression& otherExpr); + + void writeFunctionCall(const FunctionCall& c); + + void writeConstructor(const Constructor& c); + + void writeFieldAccess(const FieldAccess& f); + + void writeSwizzle(const Swizzle& swizzle); + + static Precedence GetBinaryPrecedence(Token::Kind op); + + void writeBinaryExpression(const BinaryExpression& b, Precedence parentPrecedence); + + void writeTernaryExpression(const TernaryExpression& t, Precedence parentPrecedence); + + void writeIndexExpression(const IndexExpression& expr); + + void writePrefixExpression(const PrefixExpression& p, Precedence parentPrecedence); + + void writePostfixExpression(const PostfixExpression& p, Precedence parentPrecedence); + + void writeBoolLiteral(const BoolLiteral& b); + + void writeIntLiteral(const IntLiteral& i); + + void writeFloatLiteral(const FloatLiteral& f); + + void writeSetting(const Setting& s); + + void writeStatement(const Statement& s); + + void writeStatements(const std::vector<std::unique_ptr<Statement>>& statements); + + void writeBlock(const Block& b); + + void writeIfStatement(const IfStatement& stmt); + + void writeForStatement(const ForStatement& f); + + void writeWhileStatement(const WhileStatement& w); + + void writeDoStatement(const DoStatement& d); + + void writeSwitchStatement(const SwitchStatement& s); + + void writeReturnStatement(const ReturnStatement& r); + + void writeProgramElement(const ProgramElement& e); + + Requirements requirements(const FunctionDeclaration& f); + + Requirements requirements(const Expression& e); + + Requirements requirements(const Statement& e); + + const char* fLineEnding; + const Context& fContext; + StringStream fHeader; + String fFunctionHeader; + Program::Kind fProgramKind; + int fVarCount = 0; + int fIndentation = 0; + bool fAtLineStart = false; + // Keeps track of which struct types we have written. Given that we are unlikely to ever write + // more than one or two structs per shader, a simple linear search will be faster than anything + // fancier. + std::vector<const Type*> fWrittenStructs; + // true if we have run into usages of dFdx / dFdy + bool fFoundDerivatives = false; + bool fFoundImageDecl = false; + std::unordered_map<const FunctionDeclaration*, Requirements> fRequirements; + bool fSetupFragPositionGlobal = false; + bool fSetupFragPositionLocal = false; + int fUniformBuffer = -1; + + typedef CodeGenerator INHERITED; +}; + +} + +#endif diff --git a/src/sksl/SkSLString.cpp b/src/sksl/SkSLString.cpp index 2bbb772672..bd6de3532c 100644 --- a/src/sksl/SkSLString.cpp +++ b/src/sksl/SkSLString.cpp @@ -155,6 +155,14 @@ bool StringFragment::operator!=(const char* s) const { return strncmp(fChars, s, fLength); } +bool operator==(const char* s1, StringFragment s2) { + return s2 == s1; +} + +bool operator!=(const char* s1, StringFragment s2) { + return s2 != s1; +} + String to_string(int32_t value) { return SkSL::String::printf("%d", value); } diff --git a/src/sksl/SkSLString.h b/src/sksl/SkSLString.h index 9cfdce4768..7522939ece 100644 --- a/src/sksl/SkSLString.h +++ b/src/sksl/SkSLString.h @@ -51,6 +51,10 @@ struct StringFragment { size_t fLength; }; +bool operator==(const char* s1, StringFragment s2); + +bool operator!=(const char* s1, StringFragment s2); + class String : public SKSL_STRING_BASE { public: String() = default; |