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/*
* 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_SECTIONANDPARAMETERHELPER
#define SKSL_SECTIONANDPARAMETERHELPER
#include "SkSLErrorReporter.h"
#include "ir/SkSLProgram.h"
#include "ir/SkSLSection.h"
#include "ir/SkSLVarDeclarations.h"
#include <unordered_map>
#include <vector>
namespace SkSL {
#define CLASS_SECTION "class"
#define CLONE_SECTION "clone"
#define CONSTRUCTOR_SECTION "constructor"
#define CONSTRUCTOR_CODE_SECTION "constructorCode"
#define CONSTRUCTOR_PARAMS_SECTION "constructorParams"
#define COORD_TRANSFORM_SECTION "coordTransform"
#define CPP_SECTION "cpp"
#define CPP_END_SECTION "cppEnd"
#define HEADER_SECTION "header"
#define HEADER_END_SECTION "headerEnd"
#define EMIT_CODE_SECTION "emitCode"
#define FIELDS_SECTION "fields"
#define INITIALIZERS_SECTION "initializers"
#define MAKE_SECTION "make"
#define OPTIMIZATION_FLAGS_SECTION "optimizationFlags"
#define SAMPLER_PARAMS_SECTION "samplerParams"
#define SET_DATA_SECTION "setData"
#define TEST_CODE_SECTION "test"
class SectionAndParameterHelper {
public:
SectionAndParameterHelper(const Program& program, ErrorReporter& errors) {
for (const auto& p : program.fElements) {
switch (p->fKind) {
case ProgramElement::kVar_Kind: {
const VarDeclarations* decls = (const VarDeclarations*) p.get();
for (const auto& raw : decls->fVars) {
const VarDeclaration& decl = (VarDeclaration&) *raw;
if (IsParameter(*decl.fVar)) {
fParameters.push_back(decl.fVar);
}
}
break;
}
case ProgramElement::kSection_Kind: {
const Section* s = (const Section*) p.get();
if (IsSupportedSection(s->fName.c_str())) {
if (SectionAcceptsArgument(s->fName.c_str())) {
if (!s->fArgument.size()) {
errors.error(s->fOffset,
("section '@" + s->fName +
"' requires one parameter").c_str());
}
} else if (s->fArgument.size()) {
errors.error(s->fOffset,
("section '@" + s->fName + "' has no parameters").c_str());
}
} else {
errors.error(s->fOffset,
("unsupported section '@" + s->fName + "'").c_str());
}
if (!SectionPermitsDuplicates(s->fName.c_str()) &&
fSections.find(s->fName) != fSections.end()) {
errors.error(s->fOffset,
("duplicate section '@" + s->fName + "'").c_str());
}
fSections[s->fName].push_back(s);
break;
}
default:
break;
}
}
}
const Section* getSection(const char* name) {
ASSERT(!SectionPermitsDuplicates(name));
auto found = fSections.find(name);
if (found == fSections.end()) {
return nullptr;
}
ASSERT(found->second.size() == 1);
return found->second[0];
}
std::vector<const Section*> getSections(const char* name) {
auto found = fSections.find(name);
if (found == fSections.end()) {
return std::vector<const Section*>();
}
return found->second;
}
const std::vector<const Variable*>& getParameters() {
return fParameters;
}
static bool IsParameter(const Variable& var) {
return (var.fModifiers.fFlags & Modifiers::kIn_Flag) &&
-1 == var.fModifiers.fLayout.fBuiltin;
}
static bool IsSupportedSection(const char* name) {
return !strcmp(name, CLASS_SECTION) ||
!strcmp(name, CLONE_SECTION) ||
!strcmp(name, CONSTRUCTOR_SECTION) ||
!strcmp(name, CONSTRUCTOR_CODE_SECTION) ||
!strcmp(name, CONSTRUCTOR_PARAMS_SECTION) ||
!strcmp(name, COORD_TRANSFORM_SECTION) ||
!strcmp(name, CPP_SECTION) ||
!strcmp(name, CPP_END_SECTION) ||
!strcmp(name, EMIT_CODE_SECTION) ||
!strcmp(name, FIELDS_SECTION) ||
!strcmp(name, HEADER_SECTION) ||
!strcmp(name, HEADER_END_SECTION) ||
!strcmp(name, INITIALIZERS_SECTION) ||
!strcmp(name, MAKE_SECTION) ||
!strcmp(name, OPTIMIZATION_FLAGS_SECTION) ||
!strcmp(name, SAMPLER_PARAMS_SECTION) ||
!strcmp(name, SET_DATA_SECTION) ||
!strcmp(name, TEST_CODE_SECTION);
}
static bool SectionAcceptsArgument(const char* name) {
return !strcmp(name, COORD_TRANSFORM_SECTION) ||
!strcmp(name, SAMPLER_PARAMS_SECTION) ||
!strcmp(name, SET_DATA_SECTION) ||
!strcmp(name, TEST_CODE_SECTION);
}
static bool SectionPermitsDuplicates(const char* name) {
return !strcmp(name, COORD_TRANSFORM_SECTION) ||
!strcmp(name, SAMPLER_PARAMS_SECTION);
}
private:
std::vector<const Variable*> fParameters;
std::unordered_map<String, std::vector<const Section*>> fSections;
};
} // namespace SkSL
#endif
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