pngdib.c File Reference

#include <windows.h>
#include <stdio.h>
#include <stdlib.h>
#include <malloc.h>
#include <math.h>
#include "png.h"
#include "pngdib.h"

Classes
struct	errstruct
Defines
#define	PNGDIB_SRC_VERSION   20200
#define	PNGDIB_SRC_VERSION_STRING   "2.2.0"
#define	MAX_ERRMSGLEN   100
#define	PNG_GAMMA_THRESHOLD   0.05
Functions
static void	pngd_get_error_message (int rv, char *e)
static unsigned char *	uncompress_dib (LPBITMAPINFO lpbmi1, int infosize, void *lpbits1)
static void	my_error_fn (png_structp png_ptr, const char *err_msg)
static void	my_warning_fn (png_structp png_ptr, const char *warn_msg)
static void	gamma_correct (double screen_gamma, double file_gamma, unsigned char *red, unsigned char *green, unsigned char *blue)
int	read_png_to_dib (PNGD_P2DINFO *p2dp)
int	write_dib_to_png (PNGD_D2PINFO *d2pp)
char *	pngdib_get_version_string (void)
int	pngdib_get_version (void)
Variables
static const double	screen_gamma = 2.2

---

Define Documentation

#define MAX_ERRMSGLEN   100

Referenced by my_error_fn().

#define PNG_GAMMA_THRESHOLD   0.05

Referenced by gamma_correct().

#define PNGDIB_SRC_VERSION   20200

#define PNGDIB_SRC_VERSION_STRING   "2.2.0"

---

Function Documentation

static void gamma_correct	(	double	screen_gamma,
		double	file_gamma,
		unsigned char *	red,
		unsigned char *	green,
		unsigned char *	blue
	)			[static]

References PNG_GAMMA_THRESHOLD.

Referenced by read_png_to_dib().

static void my_error_fn	(	png_structp	png_ptr,
		const char *	err_msg
	)			[static]

References errstruct::errmsg, errstruct::jbufp, and MAX_ERRMSGLEN.

Referenced by read_png_to_dib(), and write_dib_to_png().

static void my_warning_fn	(	png_structp	png_ptr,
		const char *	warn_msg
	)			[static]

Referenced by read_png_to_dib(), and write_dib_to_png().

static void pngd_get_error_message	(	int	rv,
		char *	e
	)			[static]

References PNGD_E_BADBMP, PNGD_E_BADPNG, PNGD_E_ERROR, PNGD_E_LIBPNG, PNGD_E_NOMEM, PNGD_E_READ, PNGD_E_UNSUPP, PNGD_E_VERSION, and PNGD_E_WRITE.

Referenced by read_png_to_dib(), and write_dib_to_png().

int pngdib_get_version

(

void

)

char* pngdib_get_version_string

(

void

)

int read_png_to_dib

(

PNGD_P2DINFO *

p2dp

)

References PNGD_P2DINFO_struct::bgcolor, PNGD_P2DINFO_struct::bits_offs, PNGD_P2DINFO_struct::bits_per_pixel, PNGD_P2DINFO_struct::bits_per_sample, PNGD_COLOR_struct::blue, PNGD_P2DINFO_struct::color_type, PNGD_P2DINFO_struct::dibsize, errstruct::errmsg, PNGD_P2DINFO_struct::errmsg, PNGD_P2DINFO_struct::file_gamma, PNGD_P2DINFO_struct::flags, gamma_correct(), PNGD_COLOR_struct::green, PNGD_P2DINFO_struct::heap, PNGD_P2DINFO_struct::interlace, errstruct::jbufp, PNGD_P2DINFO_struct::lpbits, PNGD_P2DINFO_struct::lpdib, my_error_fn(), my_warning_fn(), PNGD_P2DINFO_struct::palette, PNGD_P2DINFO_struct::palette_colors, PNGD_P2DINFO_struct::palette_offs, PNGD_GAMMA_CORRECTION, pngd_get_error_message(), PNGD_USE_BKGD, PNGD_USE_CUSTOM_BG, PNGD_USE_HEAPALLOC, PNGD_P2DINFO_struct::pngfn, PNGD_COLOR_struct::red, PNGD_P2DINFO_struct::res_units, PNGD_P2DINFO_struct::res_x, PNGD_P2DINFO_struct::res_y, screen_gamma, PNGD_P2DINFO_struct::structsize, and VOID().

Referenced by convertPNG2BMP().

static unsigned char* uncompress_dib	(	LPBITMAPINFO	lpbmi1,
		int	infosize,
		void *	lpbits1
	)			[static]

Referenced by write_dib_to_png().

int write_dib_to_png

(

PNGD_D2PINFO *

d2pp

)

References PNGD_D2PINFO_struct::bitssize, PNGD_D2PINFO_struct::dibsize, PNGD_D2PINFO_struct::errmsg, errstruct::errmsg, PNGD_D2PINFO_struct::flags, errstruct::jbufp, PNGD_D2PINFO_struct::lpbits, PNGD_D2PINFO_struct::lpdib, my_error_fn(), my_warning_fn(), pngd_get_error_message(), PNGD_INTERLACED, PNGD_NO_GAMMA_LABEL, PNGD_D2PINFO_struct::pngfn, size, PNGD_D2PINFO_struct::software, PNGD_D2PINFO_struct::structsize, uncompress_dib(), and VOID().

Referenced by convertBMP2PNG().

---

Variable Documentation

const double screen_gamma = 2.2 [static]

Referenced by read_png_to_dib().