source/glsl/finalize.h

   1 #ifndef MSP_GL_SL_COMPATIBILITY_H_
   2 #define MSP_GL_SL_COMPATIBILITY_H_
   3
   4 #include <string>
   5 #include "visitor.h"
   6
   7 namespace Msp {
   8 namespace GL {
   9 namespace SL {
  10
  11 class LocationAllocator: private TraversingVisitor
  12 {
  13 private:
  14         struct Uniform
  15         {
  16                 int location;
  17                 int desc_set;
  18                 int bind_point;
  19
  20                 Uniform(): location(-1), desc_set(-1), bind_point(-1) { }
  21         };
  22
  23         std::map<std::string, std::set<unsigned> > used_locations;
  24         std::map<std::string, Uniform> uniforms;
  25         std::map<unsigned, std::set<unsigned> > used_bindings;
  26         std::vector<VariableDeclaration *> unplaced_variables;
  27         std::vector<VariableDeclaration *> unbound_textures;
  28         std::vector<InterfaceBlock *> unbound_blocks;
  29
  30 public:
  31         void apply(Module &, const Features &);
  32 private:
  33         void apply(Stage &);
  34
  35         void allocate_locations(const std::string &);
  36         void bind_uniform(RefPtr<Layout> &, const std::string &, unsigned);
  37         void add_layout_value(RefPtr<Layout> &, const std::string &, unsigned);
  38
  39         virtual void visit(VariableDeclaration &);
  40         virtual void visit(InterfaceBlock &);
  41         virtual void visit(FunctionDeclaration &) { }
  42 };
  43
  44 /** Generates default precision declarations or removes precision declarations
  45 according to the requirements of the target API. */
  46 class PrecisionConverter: private TraversingVisitor
  47 {
  48 private:
  49         Stage *stage;
  50         std::set<std::string> have_default;
  51         NodeList<Statement>::iterator insert_point;
  52         std::set<Node *> nodes_to_remove;
  53
  54 public:
  55         PrecisionConverter();
  56
  57         void apply(Stage &);
  58
  59 private:
  60         virtual void visit(Block &);
  61         virtual void visit(Precision &);
  62         virtual void visit(VariableDeclaration &);
  63 };
  64
  65 /** Converts structures of the syntax tree to match a particular set of
  66 features. */
  67 class LegacyConverter: private TraversingVisitor
  68 {
  69 private:
  70         Stage *stage;
  71         Features features;
  72         VariableDeclaration *frag_out;
  73         NodeList<Statement>::iterator uniform_insert_point;
  74         std::set<Node *> nodes_to_remove;
  75
  76 public:
  77         LegacyConverter();
  78
  79         virtual void apply(Stage &, const Features &);
  80
  81 private:
  82         void unsupported(const std::string &);
  83
  84         virtual void visit(Block &);
  85         bool check_version(const Version &) const;
  86         bool check_extension(bool Features::*) const;
  87         bool supports_stage(Stage::Type) const;
  88         bool supports_unified_interface_syntax() const;
  89         virtual void visit(VariableReference &);
  90         virtual void visit(Assignment &);
  91         bool supports_unified_sampling_functions() const;
  92         virtual void visit(FunctionCall &);
  93         bool supports_interface_layouts() const;
  94         bool supports_stage_interface_layouts() const;
  95         bool supports_centroid_sampling() const;
  96         bool supports_sample_sampling() const;
  97         bool supports_uniform_location() const;
  98         bool supports_binding() const;
  99         virtual void visit(VariableDeclaration &);
 100         bool supports_interface_blocks(const std::string &) const;
 101         bool supports_interface_block_location() const;
 102         virtual void visit(InterfaceBlock &);
 103 };
 104
 105 } // namespace SL
 106 } // namespace GL
 107 } // namespace Msp
 108
 109 #endif