The Tor Browser / file diff

     1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/gfx/angle/src/compiler/MapLongVariableNames.cpp	Wed Dec 31 06:09:35 2014 +0100
     1.3 @@ -0,0 +1,132 @@
     1.4 +//
     1.5 +// Copyright (c) 2002-2012 The ANGLE Project Authors. All rights reserved.
     1.6 +// Use of this source code is governed by a BSD-style license that can be
     1.7 +// found in the LICENSE file.
     1.8 +//
     1.9 +
    1.10 +#include "compiler/MapLongVariableNames.h"
    1.11 +
    1.12 +#include "third_party/murmurhash/MurmurHash3.h"
    1.13 +
    1.14 +namespace {
    1.15 +
    1.16 +TString mapLongName(size_t id, const TString& name, bool isGlobal)
    1.17 +{
    1.18 +    ASSERT(name.size() > MAX_SHORTENED_IDENTIFIER_SIZE);
    1.19 +    TStringStream stream;
    1.20 +
    1.21 +    uint64_t hash[2] = {0, 0};
    1.22 +    MurmurHash3_x64_128(name.data(), name.length(), 0, hash);
    1.23 +
    1.24 +    // We want to avoid producing a string with a double underscore,
    1.25 +    // which would be an illegal GLSL identifier. We can assume that the
    1.26 +    // original identifier doesn't have a double underscore, otherwise
    1.27 +    // it's illegal anyway.
    1.28 +    stream << (name[0] == '_' ? "webgl" : "webgl_")
    1.29 +           << name.substr(0, 9)
    1.30 +           << (name[8] == '_' ? "" : "_")
    1.31 +           << std::hex
    1.32 +           << hash[0];
    1.33 +    ASSERT(stream.str().length() <= MAX_SHORTENED_IDENTIFIER_SIZE);
    1.34 +    ASSERT(stream.str().length() >= MAX_SHORTENED_IDENTIFIER_SIZE - 2);
    1.35 +    return stream.str();
    1.36 +}
    1.37 +
    1.38 +LongNameMap* gLongNameMapInstance = NULL;
    1.39 +
    1.40 +}  // anonymous namespace
    1.41 +
    1.42 +LongNameMap::LongNameMap()
    1.43 +    : refCount(0)
    1.44 +{
    1.45 +}
    1.46 +
    1.47 +LongNameMap::~LongNameMap()
    1.48 +{
    1.49 +}
    1.50 +
    1.51 +// static
    1.52 +LongNameMap* LongNameMap::GetInstance()
    1.53 +{
    1.54 +    if (gLongNameMapInstance == NULL)
    1.55 +        gLongNameMapInstance = new LongNameMap;
    1.56 +    gLongNameMapInstance->refCount++;
    1.57 +    return gLongNameMapInstance;
    1.58 +}
    1.59 +
    1.60 +void LongNameMap::Release()
    1.61 +{
    1.62 +    ASSERT(gLongNameMapInstance == this);
    1.63 +    ASSERT(refCount > 0);
    1.64 +    refCount--;
    1.65 +    if (refCount == 0) {
    1.66 +        delete gLongNameMapInstance;
    1.67 +        gLongNameMapInstance = NULL;
    1.68 +    }
    1.69 +}
    1.70 +
    1.71 +const char* LongNameMap::Find(const char* originalName) const
    1.72 +{
    1.73 +    std::map<std::string, std::string>::const_iterator it = mLongNameMap.find(
    1.74 +        originalName);
    1.75 +    if (it != mLongNameMap.end())
    1.76 +        return (*it).second.c_str();
    1.77 +    return NULL;
    1.78 +}
    1.79 +
    1.80 +void LongNameMap::Insert(const char* originalName, const char* mappedName)
    1.81 +{
    1.82 +    mLongNameMap.insert(std::map<std::string, std::string>::value_type(
    1.83 +        originalName, mappedName));
    1.84 +}
    1.85 +
    1.86 +size_t LongNameMap::Size() const
    1.87 +{
    1.88 +    return mLongNameMap.size();
    1.89 +}
    1.90 +
    1.91 +MapLongVariableNames::MapLongVariableNames(LongNameMap* globalMap)
    1.92 +{
    1.93 +    ASSERT(globalMap);
    1.94 +    mGlobalMap = globalMap;
    1.95 +}
    1.96 +
    1.97 +void MapLongVariableNames::visitSymbol(TIntermSymbol* symbol)
    1.98 +{
    1.99 +    ASSERT(symbol != NULL);
   1.100 +    if (symbol->getSymbol().size() > MAX_SHORTENED_IDENTIFIER_SIZE) {
   1.101 +        switch (symbol->getQualifier()) {
   1.102 +          case EvqVaryingIn:
   1.103 +          case EvqVaryingOut:
   1.104 +          case EvqInvariantVaryingIn:
   1.105 +          case EvqInvariantVaryingOut:
   1.106 +          case EvqUniform:
   1.107 +            symbol->setSymbol(
   1.108 +                mapGlobalLongName(symbol->getSymbol()));
   1.109 +            break;
   1.110 +          default:
   1.111 +            symbol->setSymbol(
   1.112 +                mapLongName(symbol->getId(), symbol->getSymbol(), false));
   1.113 +            break;
   1.114 +        };
   1.115 +    }
   1.116 +}
   1.117 +
   1.118 +bool MapLongVariableNames::visitLoop(Visit, TIntermLoop* node)
   1.119 +{
   1.120 +    if (node->getInit())
   1.121 +        node->getInit()->traverse(this);
   1.122 +    return true;
   1.123 +}
   1.124 +
   1.125 +TString MapLongVariableNames::mapGlobalLongName(const TString& name)
   1.126 +{
   1.127 +    ASSERT(mGlobalMap);
   1.128 +    const char* mappedName = mGlobalMap->Find(name.c_str());
   1.129 +    if (mappedName != NULL)
   1.130 +        return mappedName;
   1.131 +    size_t id = mGlobalMap->Size();
   1.132 +    TString rt = mapLongName(id, name, true);
   1.133 +    mGlobalMap->Insert(name.c_str(), rt.c_str());
   1.134 +    return rt;
   1.135 +}