source/filmgrain.h

   1 #ifndef MSP_DEMOSCENE_FILMGRAIN_H_
   2 #define MSP_DEMOSCENE_FILMGRAIN_H_
   3
   4 #include <msp/gl/mesh.h>
   5 #include <msp/gl/postprocessor.h>
   6 #include <msp/gl/program.h>
   7 #include <msp/gl/programdata.h>
   8 #include <msp/gl/texture2darray.h>
   9 #include <msp/gl/texturing.h>
  10
  11 namespace Msp {
  12 namespace DemoScene {
  13
  14 class FilmGrain: public GL::PostProcessor
  15 {
  16 public:
  17         struct Template: public PostProcessor::Template
  18         {
  19                 class Loader: public DataFile::DerivedObjectLoader<Template, PostProcessor::Template::Loader>
  20                 {
  21                 public:
  22                         Loader(Template &t);
  23                 };
  24
  25                 unsigned size;
  26                 unsigned layers;
  27                 float coarseness;
  28                 float strength;
  29
  30                 Template();
  31
  32                 virtual FilmGrain *create(unsigned, unsigned) const;
  33         };
  34
  35 private:
  36         const Msp::GL::Mesh &mesh;
  37         const Msp::GL::Program &shprog;
  38         Msp::GL::ProgramData shdata;
  39         Msp::GL::Texturing texturing;
  40         unsigned size;
  41         unsigned layers;
  42         Msp::GL::Texture2DArray grain;
  43         unsigned current_layer;
  44
  45 public:
  46         FilmGrain(unsigned = 256, unsigned = 16);
  47
  48 private:
  49         void generate_grain();
  50         void bicubic2x(const UInt8 *, UInt8 *, Int16 *);
  51         static UInt8 clamp(int);
  52
  53 public:
  54         void set_coarseness(float);
  55         void set_strength(float);
  56
  57         virtual void render(GL::Renderer &, const GL::Texture2D &, const GL::Texture2D &);
  58 };
  59
  60 } // namespace DemoScene
  61 } // namespace Msp
  62
  63 #endif