kc3-lang/angle/src/compiler/translator/ClampFragDepth.h

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• Hash : 0690e1aa
  Author :
  Date : 2017-12-21T20:51:38
  

  Add a workaround to clamp gl_FragDepth
  
  NVIDIA OpenGL drivers at least up to version 388.59 don't clamp
  gl_FragDepth when it is written to a floating point depth buffer.
  This bug is now worked around by clamping gl_FragDepth in the shader
  if it is statically used.
  
  BUG=angleproject:2299
  TEST=angle_end2end_tests on NVIDIA
  
  Change-Id: I61589b2b0dd2813c4901a157c8d37e470063773c
  Reviewed-on: https://chromium-review.googlesource.com/840842
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Corentin Wallez <cwallez@chromium.org>
  

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• src/compiler/translator/ClampFragDepth.h

• //
  // Copyright (c) 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.
  //
  // ClampFragDepth.h: Limit the value that is written to gl_FragDepth to the range [0.0, 1.0].
  // The clamping is run at the very end of shader execution, and is only performed if the shader
  // statically accesses gl_FragDepth.
  //
  
  #ifndef COMPILER_TRANSLATOR_CLAMPFRAGDEPTH_H_
  #define COMPILER_TRANSLATOR_CLAMPFRAGDEPTH_H_
  
  namespace sh
  {
  
  class TIntermBlock;
  class TSymbolTable;
  
  void ClampFragDepth(TIntermBlock *root, TSymbolTable *symbolTable);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_CLAMPFRAGDEPTH_H_
  

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