texture.h

#ifndef TEXTURE_H
#define TEXTURE_H

#include <QOpenGLFunctions_4_1_Core>

/**
    \brief Simple class for creating textures from a bitmap file.
    \author Dag Nylund
    \date 16/02/05
 */
class Texture : protected QOpenGLFunctions_4_1_Core
{
private:
    GLubyte pixels[16];
    GLuint mId{0};
    unsigned char *mBitmap;
    // NB: Columns are actually width because idk...
    int mColumns;
    int mRows;
    int mnByte;
    void readBitmap(const std::string& filename);
    void setTexture(GLuint textureUnit);
    void initCubeMap(GLuint textureUnit = 0);
public:
    Texture(GLuint textureUnit = 0);  //basic texture from code
    // More general constructor
    Texture(const std::string& filename, GLenum type, GLuint textureUnit = 0);
    GLuint id() const;

    GLenum mType;
    static Texture cubeMap(const std::string &filename, GLuint textureUnit = 0);

private:
    //this is put inside this class to avoid spamming the main namespace
    //with stuff that only is used inside this class

    //Quick fix to get rid of windows.h which contains
    //BITMAPINFOHEADER and BITMAPFILEHEADER.
    typedef unsigned short int OWORD;    //should be 16 bit
    typedef unsigned int ODWORD;         //should be 32 bit
    typedef int OLONG;                   //should be 32 bit

    struct OBITMAPINFOHEADER {
        ODWORD biSize;
        OLONG  biWidth;
        OLONG  biHeight;
        OWORD  biPlanes;
        OWORD  biBitCount;
        ODWORD biCompression;
        ODWORD biSizeImage;
        OLONG  biXPelsPerMeter;
        OLONG  biYPelsPerMeter;
        ODWORD biClrUsed;
        ODWORD biClrImportant;
    };

    struct OBITMAPFILEHEADER {
        OWORD  bfType;
        ODWORD bfSize;
        OWORD  bfReserved1;
        OWORD  bfReserved2;
        ODWORD bfOffBits;
    };
};

#endif // TEXTURE_H