Line data    Source code

       1             : //
       2             : // Copyright (c) 2002-2013 The ANGLE Project Authors. All rights reserved.
       3             : // Use of this source code is governed by a BSD-style license that can be
       4             : // found in the LICENSE file.
       5             : //
       6             : 
       7             : #ifndef COMPILER_TRANSLATOR_VERSIONGLSL_H_
       8             : #define COMPILER_TRANSLATOR_VERSIONGLSL_H_
       9             : 
      10             : #include "compiler/translator/IntermNode.h"
      11             : 
      12             : #include "compiler/translator/Pragma.h"
      13             : 
      14             : namespace sh
      15             : {
      16             : 
      17             : static const int GLSL_VERSION_110 = 110;
      18             : static const int GLSL_VERSION_120 = 120;
      19             : static const int GLSL_VERSION_130 = 130;
      20             : static const int GLSL_VERSION_140 = 140;
      21             : static const int GLSL_VERSION_150 = 150;
      22             : static const int GLSL_VERSION_330 = 330;
      23             : static const int GLSL_VERSION_400 = 400;
      24             : static const int GLSL_VERSION_410 = 410;
      25             : static const int GLSL_VERSION_420 = 420;
      26             : static const int GLSL_VERSION_430 = 430;
      27             : static const int GLSL_VERSION_440 = 440;
      28             : static const int GLSL_VERSION_450 = 450;
      29             : 
      30             : int ShaderOutputTypeToGLSLVersion(ShShaderOutput output);
      31             : 
      32             : // Traverses the intermediate tree to return the minimum GLSL version
      33             : // required to legally access all built-in features used in the shader.
      34             : // GLSL 1.1 which is mandated by OpenGL 2.0 provides:
      35             : //   - #version and #extension to declare version and extensions.
      36             : //   - built-in functions refract, exp, and log.
      37             : //   - updated step() to compare x < edge instead of x <= edge.
      38             : // GLSL 1.2 which is mandated by OpenGL 2.1 provides:
      39             : //   - many changes to reduce differences when compared to the ES specification.
      40             : //   - invariant keyword and its support.
      41             : //   - c++ style name hiding rules.
      42             : //   - built-in variable gl_PointCoord for fragment shaders.
      43             : //   - matrix constructors taking matrix as argument.
      44             : //   - array as "out" function parameters
      45             : //
      46             : // TODO: ES3 equivalent versions of GLSL
      47           0 : class TVersionGLSL : public TIntermTraverser
      48             : {
      49             :   public:
      50             :     TVersionGLSL(sh::GLenum type, const TPragma &pragma, ShShaderOutput output);
      51             : 
      52             :     // If output is core profile, returns 150.
      53             :     // If output is legacy profile,
      54             :     //   Returns 120 if the following is used the shader:
      55             :     //   - "invariant",
      56             :     //   - "gl_PointCoord",
      57             :     //   - matrix/matrix constructors
      58             :     //   - array "out" parameters
      59             :     //   Else 110 is returned.
      60           0 :     int getVersion() const { return mVersion; }
      61             : 
      62             :     void visitSymbol(TIntermSymbol *) override;
      63             :     bool visitAggregate(Visit, TIntermAggregate *) override;
      64             :     bool visitDeclaration(Visit, TIntermDeclaration *node) override;
      65             : 
      66             :   private:
      67             :     void ensureVersionIsAtLeast(int version);
      68             : 
      69             :     int mVersion;
      70             : };
      71             : 
      72             : }  // namespace sh
      73             : 
      74             : #endif  // COMPILER_TRANSLATOR_VERSIONGLSL_H_