src/graphicsbuffer.h

   1 #ifndef _GRAPHICSBUFFER_H
   2 #define _GRAPHICSBUFFER_H
   3
   4 #include <SDL.h>
   5 #define GL_GLEXT_PROTOTYPES
   6 #include <SDL_opengl.h>
   7
   8
   9 namespace IPDF
  10 {
  11         /*
  12          * The "Screen" class handles managing the OS window (using SDL2).
  13          */
  14         class GraphicsBuffer
  15         {
  16         public:
  17                 enum BufferType
  18                 {
  19                         BufferTypeVertex,               // A Vertex Buffer
  20                         BufferTypeIndex,                // An Index Buffer
  21                         BufferTypePixelPack,            // Pixel Pack buffer
  22                         BufferTypePixelUnpack,
  23                         BufferTypeUniform,              // Uniform/Constant buffer
  24                         BufferTypeDrawIndirect,
  25                 };
  26
  27                 enum BufferUsage
  28                 {
  29                         BufferUsageStaticDraw,
  30                         BufferUsageStaticRead,
  31                         BufferUsageStaticCopy,
  32                         BufferUsageDynamicDraw,
  33                         BufferUsageDynamicRead,
  34                         BufferUsageDynamicCopy,
  35                         BufferUsageStreamDraw,
  36                         BufferUsageStreamRead,
  37                         BufferUsageStreamCopy
  38                 };
  39
  40                 GraphicsBuffer();
  41                 ~GraphicsBuffer();
  42
  43                 void SetType(BufferType bufType);
  44                 void SetUsage(BufferUsage bufUsage);
  45
  46                 void *Map(bool read, bool write, bool invalidate);
  47                 void *MapRange(int offset, int length, bool read, bool write, bool invalidate);
  48
  49                 void UnMap();
  50
  51                 void Upload(size_t length, const void *data);
  52                 void UploadRange(size_t length, intptr_t offset, const void *data);
  53
  54                 void Resize(size_t length);
  55                 const size_t GetSize() const { return m_buffer_size; }
  56
  57                 void Bind();
  58         private:
  59                 GLuint m_buffer_handle;
  60                 BufferType m_buffer_type;
  61                 BufferUsage m_buffer_usage;
  62                 void *m_map_pointer;
  63                 size_t m_buffer_size;
  64                 bool m_invalidated;
  65         };
  66
  67 }
  68
  69 #endif // _SCREEN_H