source/program.h

   1 #ifndef MSP_GL_PROGRAM_H_
   2 #define MSP_GL_PROGRAM_H_
   3
   4 #include <list>
   5 #include <string>
   6 #include <msp/datafile/objectloader.h>
   7 #include "bindable.h"
   8 #include "gl.h"
   9 #include "programbuilder.h"
  10 #include "vertexformat.h"
  11
  12 namespace Msp {
  13 namespace GL {
  14
  15 class Shader;
  16
  17 class Program: public Bindable<Program>
  18 {
  19 public:
  20         class Loader: public DataFile::ObjectLoader<Program>
  21         {
  22         public:
  23                 Loader(Program &);
  24
  25         private:
  26                 virtual void finish();
  27
  28                 void attribute(unsigned, const std::string &);
  29                 void fragment_shader(const std::string &);
  30                 void standard();
  31                 void vertex_shader(const std::string &);
  32         };
  33
  34         struct UniformBlockInfo;
  35
  36         struct UniformInfo
  37         {
  38                 std::string name;
  39                 const UniformBlockInfo *block;
  40                 unsigned location;
  41                 unsigned size;
  42                 unsigned array_stride;
  43                 unsigned matrix_stride;
  44                 GLenum type;
  45         };
  46
  47         struct UniformBlockInfo
  48         {
  49                 std::string name;
  50                 unsigned data_size;
  51                 unsigned bind_point;
  52                 std::vector<const UniformInfo *> uniforms;
  53                 unsigned layout_hash;
  54         };
  55
  56         typedef std::list<Shader *> ShaderList;
  57         typedef std::map<std::string, UniformInfo> UniformMap;
  58         typedef std::map<std::string, UniformBlockInfo> UniformBlockMap;
  59
  60 private:
  61         unsigned id;
  62         ShaderList shaders;
  63         ShaderList owned_data;
  64         bool linked;
  65         UniformBlockMap uniform_blocks;
  66         UniformMap uniforms;
  67         unsigned uniform_layout_hash;
  68         bool legacy_vars;
  69
  70 public:
  71         Program();
  72         Program(const ProgramBuilder::StandardFeatures &);
  73         Program(const std::string &, const std::string &);
  74 private:
  75         void init();
  76 public:
  77         virtual ~Program();
  78
  79         void attach_shader(Shader &shader);
  80         void attach_shader_owned(Shader *shader);
  81         void detach_shader(Shader &shader);
  82         const ShaderList &get_shaders() const { return shaders; }
  83
  84         void bind_attribute(unsigned, const std::string &);
  85         void bind_attribute(VertexComponent, const std::string &);
  86         void bind_fragment_data(unsigned, const std::string &);
  87
  88         void link();
  89 private:
  90         static unsigned compute_layout_hash(const std::vector<const UniformInfo *> &);
  91         static bool uniform_location_compare(const UniformInfo *, const UniformInfo *);
  92 public:
  93         bool is_linked() const { return linked; }
  94         std::string get_info_log() const;
  95
  96         unsigned get_uniform_layout_hash() const { return uniform_layout_hash; }
  97         const UniformBlockMap &get_uniform_blocks() const { return uniform_blocks; }
  98         const UniformBlockInfo &get_uniform_block_info(const std::string &) const;
  99         const UniformMap &get_uniforms() const { return uniforms; }
 100         const UniformInfo &get_uniform_info(const std::string &) const;
 101         int get_uniform_location(const std::string &) const;
 102
 103         bool uses_legacy_variables() const { return legacy_vars; }
 104
 105         void bind() const;
 106         static void unbind();
 107 };
 108
 109 } // namespace GL
 110 } // namespace Msp
 111
 112 #endif