virtual void* mapBufferSubDataCHROMIUM(unsigned target, int offset, int size, unsigned access);
virtual void unmapBufferSubDataCHROMIUM(const void*);
virtual void* mapTexSubImage2DCHROMIUM(unsigned target, int level, int xoffset, int yoffset, int width, int height, unsigned format, unsigned type, unsigned access);
virtual void unmapTexSubImage2DCHROMIUM(const void*);
virtual void* mapBufferSubDataCHROMIUM(unsigned target, int offset, int size, unsigned access);
virtual void unmapBufferSubDataCHROMIUM(const void*);
virtual void* mapTexSubImage2DCHROMIUM(unsigned target, int level, int xoffset, int yoffset, int width, int height, unsigned format, unsigned type, unsigned access);
virtual void unmapTexSubImage2DCHROMIUM(const void*);