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

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• Hash : 34130c2e
  Author :
  Date : 2020-11-07T15:11:14
  

  Vulkan: Rewrite interpolateAtOffset to account for Y-flip
  
  In order to fully suppot OES_shader_multisample_interpolation
  rewrite interpolateAtOffset's offset parameter to account for
  Y-coordinate flip.
  
  Bug: angleproject:3589
  Tests: dEQP-GLES31.functional.shaders.multisample_interpolation.
          interpolate_at_offset.*.default_framebuffer
  Change-Id: I6bf72ceb1c0466ff5d4a92b72d1ec9e2552d6f2a
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2524711
  Commit-Queue: Mohan Maiya <m.maiya@samsung.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  

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

• //
  // Copyright 2020 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 2nd argument of interpolateAtOffset() to account for
  // Y-coordinate flipping
  //
  // From: interpolateAtOffset(float interpolant, vec2 offset);
  // To: interpolateAtOffset(float interpolant, vec2(offset * (pre-rotation * viewportYScale)));
  //
  // See http://anglebug.com/3589
  
  #ifndef COMPILER_TRANSLATOR_TREEOPS_FLIP_INTERPOLATEATOFFSET_H_
  #define COMPILER_TRANSLATOR_TREEOPS_FLIP_INTERPOLATEATOFFSET_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 RewriteInterpolateAtOffset(TCompiler *compiler,
                                                   TIntermNode *root,
                                                   const TSymbolTable &symbolTable,
                                                   int shaderVersion,
                                                   TIntermBinary *flipXY,
                                                   TIntermTyped *fragRotation);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEOPS_FLIP_INTERPOLATEATOFFSET_H_
  

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