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

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• Hash : cbd5bee8
  Author :
  Date : 2020-07-13T20:31:29
  

  Disable shader's pre-rotation code on Metal & non-Android.
  
  Pre-rotation code were added to transform gl_Position, gl_FragCoords,
  gl_PointCoords, dFdX, dFdY in shader. However, it is only useful for
  android's surface pre-rotation and completely un-needed in Metal
  back-end.
  
  This CL disables these pre-rotation code if the platform is not
  android.
  
  Bug: angleproject:4678
  Change-Id: I89c42fcf24b49896f4ed9c2f9465da521beaf25f
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2295000
  Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Ian Elliott <ianelliott@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.
  //
  // This mutating tree traversal flips the output of dFdy() to account for framebuffer flipping.
  //
  // From: dFdy(p)
  // To:   (dFdy(p) * viewportYScale)
  //
  // See http://anglebug.com/3487
  
  #ifndef COMPILER_TRANSLATOR_TREEOPS_FLIP_DFDY_H_
  #define COMPILER_TRANSLATOR_TREEOPS_FLIP_DFDY_H_
  
  #include "common/angleutils.h"
  
  namespace sh
  {
  
  class TCompiler;
  class TIntermNode;
  class TIntermBinary;
  class TIntermTyped;
  class TSymbolTable;
  
  // If fragRotation = nullptr, no rotation will be applied.
  ANGLE_NO_DISCARD bool RewriteDfdy(TCompiler *compiler,
                                    TIntermNode *root,
                                    const TSymbolTable &symbolTable,
                                    int shaderVersion,
                                    TIntermBinary *flipXY,
                                    TIntermTyped *fragRotation);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEOPS_FLIP_DFDY_H_
  

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