src/third_party/angle/src/compiler/translator/EmulateGLFragColorBroadcast.h

//
// Copyright (c) 2002-2016 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.
//
// Emulate gl_FragColor broadcast behaviors in ES2 where
// GL_EXT_draw_buffers is explicitly enabled in a fragment shader.
//

#ifndef COMPILER_TRANSLATOR_EMULATEGLFRAGCOLORBROADCAST_H_
#define COMPILER_TRANSLATOR_EMULATEGLFRAGCOLORBROADCAST_H_

#include <vector>

namespace sh
{
struct OutputVariable;
class TIntermBlock;

// Replace all gl_FragColor with gl_FragData[0], and in the end of main() function,
// assign gl_FragData[1] ... gl_FragData[maxDrawBuffers - 1] with gl_FragData[0].
// If gl_FragColor is in outputVariables, it is replaced by gl_FragData.
void EmulateGLFragColorBroadcast(TIntermBlock *root,
                                 int maxDrawBuffers,
                                 std::vector<OutputVariable> *outputVariables);
}

#endif  // COMPILER_TRANSLATOR_EMULATEGLFRAGCOLORBROADCAST_H_