src/Image.h

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/*
This file is part of Teapot Colony Wars.

Teapot Colony Wars is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.

Teapot Colony Wars is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with Teapot Colony Wars.  If not, see <http://www.gnu.org/licenses/>.
*/

#ifndef IMAGE_H
#define IMAGE_H

#include <fstream>
#include <GL/glut.h>

typedef struct _BITMAPFILEHEADER {
  short bfType;
  int bfSize;
  short bfReserved1;
  short bfReserved2;
  int bfOffBits;
} BITMAPFILEHEADER;

typedef struct _BITMAPINFOHEADER {
  int biSize;
  int biWidth;
  int biHeight;
  short biPlanes;
  short biBitCount;
  int biCompression;
  int biSizeImage;
  int biXPelsPerMeter;
  int biYPelsPerMeter;
  int biClrUsed;
  int biClrImportant;
} BITMAPINFOHEADER;

typedef struct _RGBQUAD {
  char rgbBlue;
  char rgbGreen;
  char rgbRed;
  char rgbReserved;
} RGBQUAD;

class Image 
{
protected:

  GLuint _width;

  GLuint _height;

  GLubyte *_pixels;

  int readInt(std::ifstream &input);

  short readShort(std::ifstream &input);

  void readBMPFileHeader(std::ifstream &input, BITMAPFILEHEADER *bfh);

  void readBMPInfoHeader(std::ifstream &input, BITMAPINFOHEADER *bih);

  void readBMPColorTable(std::ifstream &input, int end, RGBQUAD *table);

  void loadBMP(const char* filename);

public:

  Image(const char* filename);

  Image(GLuint width, GLuint height);

  virtual ~Image();

  GLuint getWidth() {return _width;}

  GLuint getHeight() {return _height;}

  GLubyte* getPixels() {return _pixels;}

  GLuint genTexture1D();

  GLuint genTexture2D();
};

#endif // IMAGE_H

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