image_io.h

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#ifndef _IMAGE_IO_H
#define _IMAGE_IO_H
 
#include "image.h"
 



Image read_image( const char *filename, const bool flipY= true );
Image read_image_hdr( const char *filename, const bool flipY= true );

unsigned read_image_size( const char *filename );

bool write_image( const Image& image, const char *filename, const bool flipY= true );
bool write_image_png( const Image& image, const char *filename, const bool flipY= true );
bool write_image_bmp( const Image& image, const char *filename, const bool flipY= true );
bool write_image_hdr( const Image& image, const char *filename, const bool flipY= true );

bool write_image_preview( const Image& image, const char *filename, const bool flipY= true );

Image mipmap( const Image& image );

Image srgb( const Image& image );
Image linear( const Image& image );

Image flipY( const Image& image );
Image flipX( const Image& image );

Image copy( const Image& image, const unsigned xmin, const unsigned ymin, const unsigned width, const unsigned height );
 

struct ImageData
{
    ImageData( ) : pixels(), width(0), height(0), channels(0), size(0) {}
    ImageData( const unsigned w, const unsigned h, const unsigned c, const unsigned s= 1 ) : pixels(w*h*c*s, 0), width(w), height(h), channels(c), size(s) {}
    
    unsigned offset( const unsigned x, const unsigned y, const unsigned c= 0 ) const { return (y * width +x) * channels * size + c * size; }
    const void *data( ) const { return pixels.data(); }
    void *data( ) { return pixels.data(); }
    
    std::vector<unsigned char> pixels;
    
    unsigned width;
    unsigned height;
    unsigned channels;
    unsigned size;
};
 

ImageData read_image_data( const char *filename, const bool flipY= true );

int write_image_data( ImageData& image, const char *filename, const bool flipY= true );

ImageData read_image_data( const void *buffer, const unsigned size, const bool flipY= true );
 

ImageData flipY( const ImageData& image );
ImageData flipX( const ImageData& image );

ImageData copy( const ImageData& image, const unsigned xmin, const unsigned ymin, const unsigned width, const unsigned height );

ImageData mipmap( const ImageData& image );

int miplevels( const int width, const int height );

 
#endif