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/*
render/image.h
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#ifndef __INCLUDED_RENDER_IMAGE_H__
#define __INCLUDED_RENDER_IMAGE_H__
#include <string>
namespace render
{
/// RGB (24bpp) or RGBA (32bpp) image data
class Image
{
public:
Image(unsigned int width, unsigned int height, unsigned int channels);
~Image();
/// pointer to the raw image data
inline unsigned char *ptr() {
return image_data;
}
/// index into the raw image data
inline unsigned char *operator[](size_t index) {
return &image_data[index];
}
inline unsigned char *pixel(size_t x, size_t y) {
return &image_data[(y * image_width + x) * image_channels];
}
/// width of the image in pixels
inline unsigned int width() const {
return image_width;
}
/// height of the image in pixels
inline unsigned int height() const {
return image_height;
}
/// size of the image data in bytes
inline size_t size() const {
return ((size_t) image_width *(size_t) image_height *(size_t) image_channels);
}
/// number of channels 3 (RGB) or 4 (RGBA)
inline unsigned int channels() const {
return image_channels;
}
/// bits per pixel
inline unsigned int bpp() const {
return (image_channels * 8);
}
/// set image data to zero
void clear();
/// swap the red and blue channel values of the image
void swap_channels();
/// flip upside-down
void flip_vertical();
/// flip left-right
void flip_horizontal();
/// pad width and height up to 8 bytes
void pad();
/// load an image
static Image *load(const std::string & name);
private:
unsigned char *image_data;
unsigned int image_width;
unsigned int image_height;
unsigned int image_channels;
};
}
#endif // __INCLUDED_RENDER_IMAGE_H__
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