kc3-lang/angle/src/compiler/translator/tree_util/RewriteSampleMaskVariable.h

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• Hash : c4ca12e3
  Author :
  Date : 2020-11-20T09:02:54
  

  Vulkan: Support the single-sampled targets
  
  Add support for gl_SampleMask for single-sampled targets.
  When dealing with a single-sampled target, gl_SampleMask
  is always be set to 0xFFFFFFFF. And when the target is
  single-sampled, sample shading is disabled to enable
  Bresenham line rasterization.
  
  Bug: angleproject:3588
  Tests: dEQP-GLES31.functional.shaders.sample_variables.
             sample_mask.discard_half_per_pixel.*
             sample_mask.discard_half_per_sample.*
             sample_pos.correctness.*
             sample_mask_in.bit*_per_two_samples.*
             sample_mask.discard_half_per_two_samples.*
             sample_mask.inverse_per_*
  Change-Id: Ibb471261b8451ff01fab3dc43f2e965ae2999610
  Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/2477909
  Reviewed-by: Shahbaz Youssefi <syoussefi@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Commit-Queue: Mohan Maiya <m.maiya@samsung.com>
  

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• src/compiler/translator/tree_util/RewriteSampleMaskVariable.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.
  //
  // RewriteSampleMaskVariable.cpp: Find any references to gl_SampleMask and gl_SampleMaskIn, and
  // rewrite it with ANGLESampleMask or ANGLESampleMaskIn.
  //
  
  #ifndef COMPILER_TRANSLATOR_TREEUTIL_REWRITESAMPLEMASKVARIABLE_H_
  #define COMPILER_TRANSLATOR_TREEUTIL_REWRITESAMPLEMASKVARIABLE_H_
  
  #include "common/angleutils.h"
  
  namespace sh
  {
  
  class TCompiler;
  class TIntermBlock;
  class TSymbolTable;
  class TIntermTyped;
  
  // Rewrite every gl_SampleMask or gl_SampleMaskIn to "ANGLESampleMask" or "ANGLESampleMaskIn", then
  // at the end of shader re-assign the values of this global variable to gl_SampleMask and
  // gl_SampleMaskIn. This to solve the problem which the non constant index is used for the unsized
  // array problem.
  ANGLE_NO_DISCARD bool RewriteSampleMask(TCompiler *compiler,
                                          TIntermBlock *root,
                                          TSymbolTable *symbolTable,
                                          const TIntermTyped *numSamplesUniform);
  
  ANGLE_NO_DISCARD bool RewriteSampleMaskIn(TCompiler *compiler,
                                            TIntermBlock *root,
                                            TSymbolTable *symbolTable);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEUTIL_REWRITESAMPLEMASKVARIABLE_H_
  

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