kc3-lang/angle/src/compiler/translator/DeferGlobalInitializers.h

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• Hash : 0ffc441e
  Author :
  Date : 2017-05-19T14:18:55
  

  Initialize uninitialized globals in GLSL output
  
  Initializing globals is done by the DeferGlobalInitializers AST
  transformation, which makes sure that the global variable init
  proceeds in the correct order. This is important since some global
  variables may use other uninitialized globals in their initializers.
  
  The global variable init is only done in case the WebGL shader spec is
  being followed. This avoids adding global initializers twice in case
  the same shader goes through multiple translations, assuming only one
  of them is a WebGL shader translation.
  
  BUG=angleproject:1966
  TEST=angle_end2end_tests, WebGL conformance tests
  
  Change-Id: Iea701d3ae40edc906abd87303f2aa27fd23bf55a
  Reviewed-on: https://chromium-review.googlesource.com/509689
  Commit-Queue: Olli Etuaho <oetuaho@nvidia.com>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  

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• src/compiler/translator/DeferGlobalInitializers.h

• //
  // Copyright (c) 2016 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.
  //
  // DeferGlobalInitializers is an AST traverser that moves global initializers into a block in the
  // beginning of main(). This enables initialization of globals with uniforms or non-constant
  // globals, as allowed by the WebGL spec. Some initializers referencing non-constants may need to be
  // unfolded into if statements in HLSL - this kind of steps should be done after
  // DeferGlobalInitializers is run.
  //
  // It can also initialize all uninitialized globals.
  //
  
  #ifndef COMPILER_TRANSLATOR_DEFERGLOBALINITIALIZERS_H_
  #define COMPILER_TRANSLATOR_DEFERGLOBALINITIALIZERS_H_
  
  class TIntermBlock;
  
  namespace sh
  {
  void DeferGlobalInitializers(TIntermBlock *root, bool initializeUninitializedGlobals);
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_DEFERGLOBALINITIALIZERS_H_
  

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