kc3-lang/angle/src/compiler/translator/tree_ops/RewriteDfdy.h

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• Hash : 98c2e169
  Author :
  Date : 2022-05-20T16:17:49
  

  Vulkan: Reduce pre-rotation spec const to bool
  
  The specialization constant now only dictates whether x and y should be
  swapped.  The complete 8 possible states of rotation and y-flip are
  achieved by using this swap in combination with a driver uniform for x
  and y flip.
  
  Swapping is still a specialization constant to avoid degrading
  performance of dFdx/dFdy which otherwise would need both to be evaluated
  instead of one.  On platforms which don't support pre-rotation, the
  specialization constant will never change and driver uniforms entirely
  govern y-flip.  On platforms that do support pre-rotation, only two
  variations of the pipeline are needed.
  
  Bug: angleproject:7366
  Change-Id: I73f84e89fa9349d2098fa5b21573aee57d93a30c
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3663151
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Lingfeng Yang <lfy@google.com>
  Reviewed-by: Charlie Lao <cclao@google.com>
  

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• src/compiler/translator/tree_ops/RewriteDfdy.h

• //
  // Copyright 2019 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.
  //
  // RewriteDfdy: Transform dFdx and dFdy according to pre-rotation and viewport y-flip.
  
  #ifndef COMPILER_TRANSLATOR_TREEOPS_REWRITEDFDY_H_
  #define COMPILER_TRANSLATOR_TREEOPS_REWRITEDFDY_H_
  
  #include "common/angleutils.h"
  #include "compiler/translator/Compiler.h"
  
  namespace sh
  {
  
  class TCompiler;
  class TIntermBlock;
  class TSymbolTable;
  class SpecConst;
  class DriverUniform;
  
  ANGLE_NO_DISCARD bool RewriteDfdy(TCompiler *compiler,
                                    TIntermBlock *root,
                                    TSymbolTable *symbolTable,
                                    int shaderVersion,
                                    SpecConst *specConst,
                                    const DriverUniform *driverUniforms);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEOPS_REWRITEDFDY_H_
  

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