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

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• Author : shrekshao
  Date : 2019-06-18 17:24:54
  Hash : cdab03aa
  Message : Add flags to shader translator to emulate gl_BaseVertex and gl_BaseInstance Adds support for translating gl_BaseVertex and gl_BaseInstance for implementation of GL_ANGLE_base_vertex_base_instance. They will only be available in WebGL 2. Since there's no gl_VertexID and gl_InstanceID in WebGL 1. It won't be very useful to add them to WebGL 1. Mostly follow pattern of gl_DrawID of GL_multi_draw BUG=angleproject:3402,chromium:891861 Change-Id: Ifcd990c52d12f6814127b904e61a779b8d382e0c Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1666361 Commit-Queue: Shrek Shao <shrekshao@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org>

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

• //
  // Copyright 2019 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.
  //
  // EmulateGLDrawID is an AST traverser to convert the gl_DrawID builtin
  // to a uniform int
  //
  // EmulateGLBaseVertex is an AST traverser to convert the gl_BaseVertex builtin
  // to a uniform int
  //
  // EmulateGLBaseInstance is an AST traverser to convert the gl_BaseInstance builtin
  // to a uniform int
  //
  
  #ifndef COMPILER_TRANSLATOR_TREEOPS_EMULATEMULTIDRAWSHADERBUILTINS_H_
  #define COMPILER_TRANSLATOR_TREEOPS_EMULATEMULTIDRAWSHADERBUILTINS_H_
  
  #include <GLSLANG/ShaderLang.h>
  #include <vector>
  
  #include "compiler/translator/HashNames.h"
  
  namespace sh
  {
  struct Uniform;
  class TIntermBlock;
  class TSymbolTable;
  
  void EmulateGLDrawID(TIntermBlock *root,
                       TSymbolTable *symbolTable,
                       std::vector<sh::Uniform> *uniforms,
                       bool shouldCollect);
  
  void EmulateGLBaseVertex(TIntermBlock *root,
                           TSymbolTable *symbolTable,
                           std::vector<sh::Uniform> *uniforms,
                           bool shouldCollect);
  
  void EmulateGLBaseInstance(TIntermBlock *root,
                             TSymbolTable *symbolTable,
                             std::vector<sh::Uniform> *uniforms,
                             bool shouldCollect);
  
  }  // namespace sh
  
  #endif  // COMPILER_TRANSLATOR_TREEOPS_EMULATEMULTIDRAWSHADERBUILTINS_H_