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

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• Hash : 1b680b77
  Author :
  Date : 2021-06-02T22:04:45
  

  Reland "Make SH_CLAMP_INDIRECT_ARRAY_BOUNDS do proper AST transformation"
  
  This is a reland of a474fd7de769ae817db83490d410510cdbed75b2
  
  The integer clamp used in this transformation is not available in es100
  shaders, and float clamp is used instead.
  
  Original change's description:
  > Make SH_CLAMP_INDIRECT_ARRAY_BOUNDS do proper AST transformation
  >
  > This translator flag adds a clamp to non-literal indices to arrays.  Two
  > strategies were provisioned, using the clamp intrinsic or a hand-written
  > function.   The latter is ununsed in angle, chromium, firefox and
  > webkit, so this change removes this option and uses the clamp intrinsic
  > unconditionally.
  >
  > The clamp itself was added at output generation time with special flags
  > set on the index node.  This is changed such that a proper AST
  > transformation is done and no-special handling would be necessary.
  >
  > Bug: angleproject:4361
  > Bug: angleproject:4889
  > Change-Id: Ieccfd2c1c347563fb5282e9fa66d39304e62f2ca
  > Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2935041
  > Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
  > Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  
  Bug: angleproject:4361
  Bug: angleproject:4889
  Change-Id: I9397ec7e6bdfb706c2a891b33fd3b2b79e883ccc
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2940902
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Jonah Ryan-Davis <jonahr@google.com>
  

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• src/compiler/translator/OutputESSL.cpp

• //
  // Copyright 2002 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/OutputESSL.h"
  
  namespace sh
  {
  
  TOutputESSL::TOutputESSL(TInfoSinkBase &objSink,
                           ShHashFunction64 hashFunction,
                           NameMap &nameMap,
                           TSymbolTable *symbolTable,
                           sh::GLenum shaderType,
                           int shaderVersion,
                           bool forceHighp,
                           ShCompileOptions compileOptions)
      : TOutputGLSLBase(objSink,
                        hashFunction,
                        nameMap,
                        symbolTable,
                        shaderType,
                        shaderVersion,
                        SH_ESSL_OUTPUT,
                        compileOptions),
        mForceHighp(forceHighp)
  {}
  
  bool TOutputESSL::writeVariablePrecision(TPrecision precision)
  {
      if (precision == EbpUndefined)
          return false;
  
      TInfoSinkBase &out = objSink();
      if (mForceHighp)
          out << getPrecisionString(EbpHigh);
      else
          out << getPrecisionString(precision);
      return true;
  }
  
  ImmutableString TOutputESSL::translateTextureFunction(const ImmutableString &name,
                                                        const ShCompileOptions &option)
  {
      // Check WEBGL_video_texture invocation first.
      if (name == "textureVideoWEBGL")
      {
          if (option & SH_TAKE_VIDEO_TEXTURE_AS_EXTERNAL_OES)
          {
              // TODO(http://anglebug.com/3889): Implement external image situation.
              UNIMPLEMENTED();
              return ImmutableString("");
          }
          else
          {
              // Default translating textureVideoWEBGL to texture2D.
              return ImmutableString("texture2D");
          }
      }
  
      return name;
  }
  
  }  // namespace sh
  

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