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

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• Hash : edcfab40
  Author :
  Date : 2023-11-23T00:00:00
  

  Metal: Implement textureCubeGrad transformation for AGX
  
  Wrapped all affected built-in function calls
  with helpers that transform derivative values.
  
  Fixed all *.texturegrad.* dEQP failures on Apple silicon.
  
  Fixed: angleproject:7021
  Fixed: angleproject:8433
  Change-Id: I16b023840ad267ab72d31fde3cb0fa7048e5310c
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5071254
  Reviewed-by: Geoff Lang <geofflang@chromium.org>
  Commit-Queue: Alexey Knyazev <lexa.knyazev@gmail.com>
  

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

• //
  // Copyright 2023 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.
  //
  // Multiple GPU vendors have issues with transforming explicit cubemap
  // derivatives onto the appropriate face. The workarounds are vendor-specific.
  
  #ifndef COMPILER_TRANSLATOR_TREEOPS_PRETRANSFORMTEXTURECUBEGRADDERIVATIVES_H_
  #define COMPILER_TRANSLATOR_TREEOPS_PRETRANSFORMTEXTURECUBEGRADDERIVATIVES_H_
  
  #include "compiler/translator/tree_util/IntermTraverse.h"
  
  namespace sh
  {
  
  // GLSL specs say the following regarding cube
  // map sampling with explicit derivatives:
  //
  //   For the cube version, the partial derivatives of
  //   P are assumed to be in the coordinate system used
  //   before texture coordinates are projected onto the
  //   appropriate cube face.
  //
  // Apple silicon expects them partially pre-projected
  // onto the target face and written to certain vector
  // components depending on the major axis.
  [[nodiscard]] bool PreTransformTextureCubeGradDerivatives(TCompiler *compiler,
                                                            TIntermBlock *root,
                                                            TSymbolTable *symbolTable,
                                                            int shaderVersion);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEOPS_PRETRANSFORMTEXTURECUBEGRADDERIVATIVES_H_
  

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