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#ifndef PNGX_H_INCLUDED
#define PNGX_H_INCLUDED
#include <png.h>
#include "pm_c_util.h"
/* pngx is designed to be an extension of the PNG library to make using
the PNG library easier and cleaner.
*/
struct pngx_chroma {
float wx;
float wy;
float rx;
float ry;
float gx;
float gy;
float bx;
float by;
};
struct pngx_phys {
int x;
int y;
int unit;
};
struct pngx_trans {
png_bytep trans;
int numTrans;
png_color_16 * transColorP;
};
typedef enum {PNGX_READ, PNGX_WRITE} pngx_rw;
struct pngx {
png_structp png_ptr;
png_infop info_ptr;
pngx_rw rw;
png_uint_16 maxval;
};
void
pngx_create(struct pngx ** const pngxPP,
pngx_rw const rw,
jmp_buf * const jmpbufP);
void
pngx_destroy(struct pngx * const pngxP);
bool
pngx_chunkIsPresent(struct pngx * const pngxP,
uint32_t const chunkType);
png_byte
pngx_colorType(struct pngx * const pngxP);
void
pngx_setText(struct pngx * const pngxP,
png_textp const textP,
unsigned int const count);
void
pngx_setIhdr(struct pngx * const pngxP,
unsigned int const width,
unsigned int const height,
unsigned int const bitDepth,
int const colorType,
int const interlaceMethod,
int const compressionMethod,
int const filterMethod);
void
pngx_setGama(struct pngx * const pngxP,
float const fileGamma);
void
pngx_setChrm(struct pngx * const pngxP,
struct pngx_chroma const chroma);
void
pngx_setPhys(struct pngx * const pngxP,
struct pngx_phys const phys);
void
pngx_setTime(struct pngx * const pngxP,
png_time const time);
void
pngx_setSbit(struct pngx * const pngxP,
png_color_8 const sbit);
void
pngx_setInterlaceHandling(struct pngx * const pngxP);
void
pngx_setPlte(struct pngx * const pngxP,
png_color * const palette,
unsigned int const paletteSize);
void
pngx_setTrnsPalette(struct pngx * const pngxP,
const png_byte * const transPalette,
unsigned int const paletteSize);
void
pngx_setTrnsValue(struct pngx * const pngxP,
png_color_16 const transColorArg);
void
pngx_setHist(struct pngx * const pngxP,
png_uint_16 * const histogram);
struct pngx_trans
pngx_getTrns(struct pngx * const pngxP);
void
pngx_setBkgdPalette(struct pngx * const pngxP,
unsigned int const backgroundIndex);
void
pngx_setBkgdRgb(struct pngx * const pngxP,
png_color_16 const backgroundArg);
void
pngx_writeInfo(struct pngx * const pngxP);
void
pngx_writeEnd(struct pngx * const pngxP);
#endif
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