chromium/third_party/angle/src/compiler/translator/glsl/VersionGLSL.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/glsl/VersionGLSL.h"

#include "angle_gl.h"
#include "compiler/translator/Symbol.h"

namespace sh
{

namespace
{
constexpr const ImmutableString kGlPointCoordString("gl_PointCoord");
}  // anonymous namespace

int ShaderOutputTypeToGLSLVersion(ShShaderOutput output)
{ … }

// We need to scan for the following:
// 1. "invariant" keyword: This can occur in both - vertex and fragment shaders
//    but only at the global scope.
// 2. "gl_PointCoord" built-in variable: This can only occur in fragment shader
//    but inside any scope.
// 3. Call to a matrix constructor with another matrix as argument.
//    (These constructors were reserved in GLSL version 1.10.)
// 4. Arrays as "out" function parameters.
//    GLSL spec section 6.1.1: "When calling a function, expressions that do
//    not evaluate to l-values cannot be passed to parameters declared as
//    out or inout."
//    GLSL 1.1 section 5.8: "Other binary or unary expressions,
//    non-dereferenced arrays, function names, swizzles with repeated fields,
//    and constants cannot be l-values."
//    GLSL 1.2 relaxed the restriction on arrays, section 5.8: "Variables that
//    are built-in types, entire structures or arrays... are all l-values."
//
TVersionGLSL::TVersionGLSL(sh::GLenum type, const TPragma &pragma, ShShaderOutput output)
    : … { … }

void TVersionGLSL::visitSymbol(TIntermSymbol *node)
{ … }

bool TVersionGLSL::visitDeclaration(Visit, TIntermDeclaration *node)
{ … }

bool TVersionGLSL::visitGlobalQualifierDeclaration(Visit, TIntermGlobalQualifierDeclaration *node)
{ … }

void TVersionGLSL::visitFunctionPrototype(TIntermFunctionPrototype *node)
{ … }

bool TVersionGLSL::visitAggregate(Visit, TIntermAggregate *node)
{ … }

void TVersionGLSL::ensureVersionIsAtLeast(int version)
{ … }

}  // namespace sh