kc3-lang/angle/src/compiler/translator/HashNames.cpp

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• Hash : 5dd05578
  Author :
  Date : 2025-04-14T07:34:57
  

  Revert "GL: Allow untranslated shaders to pass through on GLES"
  
  This reverts commit 4e77552b86a89b449ada6d6c18f84285f5812b1d.
  
  Reason for revert: breaks ChromeOS and fuzzers
  
  Bug: angleproject:398857482
  Original change's description:
  > GL: Allow untranslated shaders to pass through on GLES
  >
  > Add an EGL extension EGL_ANGLE_create_context_passthrough_shaders which
  > uses the NULL translator and passes the original shader to the driver.
  > The parser is still used for shader reflection.
  >
  > Bug: angleproject:398857482
  > Change-Id: I7c5fcc318c7e11931f78c08dcbf4764bf77d397d
  > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6297527
  > Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  > Commit-Queue: Geoff Lang <geofflang@chromium.org>
  
  Bug: angleproject:398857482, angleproject:410423936
  Bug: chromium:410114655, chromium:410100607, chromium:410121218
  Bug: chromium:410052365, chromium:410290507, chromium:410178288
  No-Presubmit: true
  Change-Id: I45b01960637a1cda05d21a7df6d07465f6a8f5e9
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/6448984
  Bot-Commit: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
  Auto-Submit: Yuly Novikov <ynovikov@chromium.org>
  Commit-Queue: Rubber Stamper <rubber-stamper@appspot.gserviceaccount.com>
  Commit-Queue: Yuly Novikov <ynovikov@chromium.org>
  

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• src/compiler/translator/HashNames.cpp

• //
  // Copyright 2017 The ANGLE Project Authors. All rights reserved.
  // Use of this source code is governed by a BSD-style license that can be
  // found in the LICENSE file.
  //
  
  #include "compiler/translator/HashNames.h"
  
  #include "compiler/translator/ImmutableString.h"
  #include "compiler/translator/ImmutableStringBuilder.h"
  #include "compiler/translator/IntermNode.h"
  #include "compiler/translator/Symbol.h"
  
  namespace sh
  {
  
  namespace
  {
  constexpr const ImmutableString kHashedNamePrefix("webgl_");
  
  ImmutableString HashName(const ImmutableString &name, ShHashFunction64 hashFunction)
  {
      ASSERT(!name.empty());
      ASSERT(hashFunction);
      khronos_uint64_t number = (*hashFunction)(name.data(), name.length());
  
      // Build the hashed name in place.
      static const unsigned int kHexStrMaxLength = sizeof(number) * 2;
      static const size_t kHashedNameMaxLength   = kHashedNamePrefix.length() + kHexStrMaxLength;
  
      ImmutableStringBuilder hashedName(kHashedNameMaxLength);
      hashedName << kHashedNamePrefix;
  
      hashedName.appendHex(number);
  
      return hashedName;
  }
  
  void AddToNameMapIfNotMapped(const ImmutableString &name,
                               const ImmutableString &hashedName,
                               NameMap *nameMap)
  {
      if (nameMap)
      {
          NameMap::const_iterator it = nameMap->find(name.data());
          if (it != nameMap->end())
          {
              // (How bout returning?)
              return;
          }
          (*nameMap)[name.data()] = hashedName.data();
      }
  }
  
  }  // anonymous namespace
  
  ImmutableString HashName(const ImmutableString &name,
                           ShHashFunction64 hashFunction,
                           NameMap *nameMap)
  {
      const ImmutableString kUnhashedNamePrefix(kUserDefinedNamePrefix);
  
      if (hashFunction == nullptr)
      {
          if (name.length() + kUnhashedNamePrefix.length() > kESSLMaxIdentifierLength)
          {
              // If the identifier length is already close to the limit, we can't prefix it. This is
              // not a problem since there are no builtins or ANGLE's internal variables that would
              // have as long names and could conflict.
              return name;
          }
          ImmutableStringBuilder prefixedName(kUnhashedNamePrefix.length() + name.length());
          prefixedName << kUnhashedNamePrefix << name;
          ImmutableString res = prefixedName;
          AddToNameMapIfNotMapped(name, res, nameMap);
          return res;
      }
  
      // Has a hash function
      ImmutableString hashedName = HashName(name, hashFunction);
      AddToNameMapIfNotMapped(name, hashedName, nameMap);
      return hashedName;
  }
  
  ImmutableString HashName(const TSymbol *symbol, ShHashFunction64 hashFunction, NameMap *nameMap)
  {
      if (symbol->symbolType() == SymbolType::Empty)
      {
          return kEmptyImmutableString;
      }
      if (symbol->symbolType() == SymbolType::AngleInternal ||
          symbol->symbolType() == SymbolType::BuiltIn)
      {
          return symbol->name();
      }
      return HashName(symbol->name(), hashFunction, nameMap);
  }
  
  }  // namespace sh
  

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