cs237-image.hxx

Go to the documentation of this file.

/*
 * COPYRIGHT (c) 2015 John Reppy (http://cs.uchicago.edu/~jhr)
 * All rights reserved.
 */

#ifndef _CS237_IMAGE_HXX_
#define _CS237_IMAGE_HXX_

#ifndef _CS237_HXX_
#error "c237-image.hxx should not be included directly"
#endif

#include <fstream>

namespace cs237 {

    namespace __detail {

    class image_base {
      public:
        unsigned int nDims () const { return this->_nDims; }
        unsigned int format () const { return this->_format; }
        unsigned int type () const { return this->_type; }
        void *data () const { return this->_data; }
        size_t nBytes () const { return this->_nBytes; }

        unsigned int nChannels () const;

      protected:
        uint32_t    _nDims;     
        GLenum  _format;    
        GLenum  _type;      
        size_t  _nBytes;    
        void    *_data;     

        explicit image_base ()
        :  _nDims(0), _format(0), _type(0), _nBytes(0), _data(nullptr)
        { }
        explicit image_base (uint32_t nd)
        : _nDims(nd), _format(0), _type(0), _nBytes(0), _data(nullptr)
        { }
        explicit image_base (uint32_t nd, GLenum fmt, GLenum ty, size_t nPixels);

        virtual ~image_base ();

    };

    } /* namespace __detail */

  /* 1D images */
    class image1d : public __detail::image_base {
      public:
    image1d (uint32_t wid, GLenum fmt, GLenum ty);

    image1d (std::string const &file);

    GLsizei width () const { return this->_wid; }

    void texImage (GLuint texId);

    bool write (const char *file);

      private:
    GLsizei _wid;       
    };

  /* 2D images */
    class image2d : public __detail::image_base {
      public:
    image2d (uint32_t wid, uint32_t ht, GLenum fmt, GLenum ty);

    image2d (std::string const &file, bool flip = true);

    image2d (std::ifstream &inS, bool flip = true);

    GLsizei width () const { return this->_wid; }

    GLsizei height () const { return this->_ht; }

    void texImage (GLenum target, GLuint texId);

    bool write (const char *file, bool flip = true);

    bool write (std::ofstream &outS, bool flip = true);

      private:
    GLsizei _wid;       
    GLsizei _ht;        
    };

} /* namespace cs237 */

#endif /* !_CS237_IMAGE_HXX_ */