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

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• Hash : b18609b9
  Author :
  Date : 2015-07-16T14:13:11
  

  Implement ES 2,3 parts of EXT_blend_func_extended for shader translation
  
  Exposes gl_SecondaryFragColor, glSecondaryFragData[] and
  gl_MaxDualSourceDrawBuffers to GLES SL 1.0.
  
  Relaxes rules for undefined output locations for GLES SL 3.0
  and exposes gl_MaxDualSourceDrawBuffers.
  
  If the output GL context is GL ES 2.0 or 3.0:
  The emulation layer is expected to turn on EXT_blend_func_extended
  if the output GL context supports it.
  
  If the output GL context is GL:
  The emulation layer is expected to turn on EXT_blend_func_extended
  if the output GL context supports ARB_blend_func_extended or if GL
  context is 3.2 or later.
  
  If the source shader spec is GLES SL 2.0: The emulation layer is
  expected to inspect the shader compilation output variables upon
  linking. If output target is GL SL, the emulation layer should bind
  color location 0, index 1 to "angle_SecondaryFragColor" if variable
  "gl_SecondaryFragColorEXT" is used. Alternatively, emulation layer
  should bind "angle_SecondaryFragData" to locations 0,1,2,3,..., all
  color index 1, if "gl_SecondaryFragData" array is used.
  (The caller can not bind the locations or specify output variables.)
  
  If the source shader spec is GLES SL 3.0:
  The emulation layer is expected to do location auto-resolve of the
  the output variables that have undefined output locations that have
  not been bound by the caller.
  (The caller can not use gl_ built-ins, so nothing to do with those.)
  
  BUG=angleproject:1085
  TEST=angle_unittest
  
  Change-Id: I5cafe205b0c29478b0dcd24aa89a7b0000f5d046
  Reviewed-on: https://chromium-review.googlesource.com/287580
  Reviewed-by: Zhenyao Mo <zmo@chromium.org>
  Reviewed-by: Jamie Madill <jmadill@chromium.org>
  Tested-by: Kimmo Kinnunen <kkinnunen@nvidia.com>
  

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• src/compiler/translator/ExtensionBehavior.h

• //
  // Copyright (c) 2002-2010 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.
  //
  
  #ifndef COMPILER_TRANSLATOR_EXTENSIONBEHAVIOR_H_
  #define COMPILER_TRANSLATOR_EXTENSIONBEHAVIOR_H_
  
  #include <map>
  #include <string>
  
  typedef enum
  {
      EBhRequire,
      EBhEnable,
      EBhWarn,
      EBhDisable,
      EBhUndefined
  } TBehavior;
  
  inline const char* getBehaviorString(TBehavior b)
  {
      switch(b)
      {
        case EBhRequire: return "require";
        case EBhEnable: return "enable";
        case EBhWarn: return "warn";
        case EBhDisable: return "disable";
        default: return NULL;
      }
  }
  
  // Mapping between extension name and behavior.
  typedef std::map<std::string, TBehavior> TExtensionBehavior;
  
  inline bool IsExtensionEnabled(const TExtensionBehavior &extBehavior, const char *extension)
  {
      auto iter = extBehavior.find(extension);
      return iter != extBehavior.end() && (iter->second == EBhEnable || iter->second == EBhRequire);
  }
  
  #endif // COMPILER_TRANSLATOR_EXTENSIONBEHAVIOR_H_
  

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