garfeild/lightcalib/ipltexture.h

   1 #ifndef _IPLTEXTURE_H
   2 #define _IPLTEXTURE_H
   3
   4 #include <cv.h>
   5
   6 #ifdef HAVE_CONFIG_H
   7 #include <config.h>
   8 #else
   9 #ifdef WIN32
  10         // Comment this out if you do not have GLEW installed.
  11 #define HAVE_GLEW
  12 #endif
  13 #endif
  14
  15 #ifdef __APPLE__
  16 #undef HAVE_GLEW
  17 #endif
  18 #ifdef HAVE_GLEW
  19 #include <GL/glew.h>
  20 #ifndef HAVE_GL
  21 #define HAVE_GL
  22 #endif
  23 #else
  24 #ifdef WIN32
  25 #include <windows.h>
  26 #include <GL/gl.h>
  27 #define HAVE_GL
  28 #endif
  29
  30 #ifdef HAVE_GL
  31 #ifdef HAVE_APPLE_OPENGL_FRAMEWORK
  32 #include <OpenGL/gl.h>
  33 #else
  34 #include <GL/gl.h>
  35 #endif
  36 #endif
  37 #endif
  38
  39
  40 /*!
  41  * \ingroup photocalib
  42  *
  43  * Represent a texture in video memory, with optional caching.
  44  *
  45  * Honours many IplImage fields like nChannels, depth, align, and origin.
  46  */
  47 class IplTexture {
  48
  49 public:
  50         IplTexture(IplImage *image=0, bool cache=true, bool smooth=true)
  51                 : im(image), downsampled(0), allowCache(cache), reload(true),
  52                 smooth(smooth), textureGenerated(false), refcnt(1) {}
  53
  54         virtual ~IplTexture();
  55
  56         //! Only call genTexture from a valid OpenGL context !
  57         void genTexture();
  58         void loadTexture();
  59         void disableTexture();
  60         void update() { reload=true; }
  61         void setImage(IplImage *image);
  62         IplImage *getImage() { return im; }
  63         IplImage *getIm() { return im; }
  64         const IplImage *getIm() const { return im; }
  65         void freeImage() { if (this && im) { cvReleaseImage(&im); } }
  66
  67         //! Get the U texel coordinates from pixel coordinate x.
  68         double u(double x) { return x*uScale; }
  69
  70         //! Get the V texel coordinates from pixel coordinate y (axis pointing down).
  71         double v(double y) { return y*vScale + vOrigin; }
  72
  73         //! force texture regeneration.
  74         void regen();
  75
  76         //! Add a reference to the reference counter.
  77         void addRef() { refcnt++; }
  78
  79         /*! Removes a reference to the reference counter, and delete the
  80          *  texture if it reaches 0.
  81          */
  82         void unref();
  83
  84         void clearWithoutDelete() { im = downsampled = 0; }
  85
  86 private:
  87         IplImage *im;
  88         IplImage *downsampled;
  89
  90         bool allowCache;
  91         bool reload;
  92         bool smooth;
  93         bool textureGenerated;
  94         int refcnt;
  95         unsigned int texture;
  96         double uScale, vScale, vOrigin;
  97         int texWidth, texHeight;
  98 };
  99
 100 #endif