OutputESSL.cpp

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Author : Shahbaz Youssefi
Date : 2021-06-02 22:04:45
Hash : 1b680b77
Message : 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>

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

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

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