glpng.c File Reference

#include <GL/glew.h>
#include <GL/gl.h>
#include <GL/glpng.h>
#include <stdlib.h>
#include <math.h>
#include <png.h>

Include dependency graph for glpng.c:

Go to the source code of this file.

Macros
#define	GLPNG_CHECK_SIG(header, size)   (png_sig_cmp(header,0,size)==0)
#define	GET(o)   ((int)*(data + (o)))
#define	FORSTART
#define	FOREND
#define	ALPHA   *q

Functions
static unsigned char	DefaultAlphaCallback (unsigned char red, unsigned char green, unsigned char blue)
static void	checkForGammaEnv ()
static int	SafeSize (int i)
static void	Resize (int components, const png_bytep d1, int w1, int h1, png_bytep d2, int w2, int h2)
static int	HalfSize (GLint components, GLint width, GLint height, const unsigned char *data, unsigned char *d, int filter)
static void	Build2DMipmaps (GLint components, GLint width, GLint height, GLenum format, const unsigned char *data, int filter)
static int APIENTRY	pngLoadF (FILE *fp, int mipmap, int trans, pngInfo *pinfo)
static int APIENTRY	pngLoad (const char *filename, int mipmap, int trans, pngInfo *pinfo)
static unsigned int	SetParams (int wrapst, int magfilter, int minfilter)
unsigned int APIENTRY	pngBind (const char *filename, int mipmap, int trans, pngInfo *info, int wrapst, int minfilter, int magfilter)

Variables
static unsigned char	StencilRed = 0
static unsigned char	StencilGreen = 0
static unsigned char	StencilBlue = 0
static unsigned char(*	AlphaCallback )(unsigned char red, unsigned char green, unsigned char blue) = DefaultAlphaCallback
static int	StandardOrientation = 0
static int	PalettedTextures = -1
static GLint	MaxTextureSize = 0
static double	screenGamma = 2.2 / 1.0
static char	gammaExplicit = 0

Macro Definition Documentation

#define GLPNG_CHECK_SIG	(		header,
			size
	)		(png_sig_cmp(header,0,size)==0)

Definition at line 43 of file glpng.c.

Referenced by pngLoadF().

#define GET

(

o

)

((int)*(data + (o)))

Definition at line 148 of file glpng.c.

Referenced by HalfSize().

#define FORSTART

Value:

do {                            \
                    r = *p++; /* red  */        \
                    g = *p++; /* green */       \
                    b = *p++; /* blue */        \
                    *q++ = r;                   \
                    *q++ = g;                   \
                    *q++ = b;

Referenced by pngLoadF().

#define FOREND

Value:

q++;                            \
            } while (p != endp);

Referenced by pngLoadF().

#define ALPHA   *q

Referenced by pngLoadF().

Function Documentation

static unsigned char DefaultAlphaCallback ( unsigned char  red, unsigned char  green, unsigned char  blue  )

static

Definition at line 52 of file glpng.c.

static void checkForGammaEnv ( )

static

Definition at line 83 of file glpng.c.

References screenGamma.

Referenced by pngLoadF().

static int SafeSize ( int  i )

static

Definition at line 96 of file glpng.c.

References MaxTextureSize.

Referenced by pngLoadF().

static void Resize ( int  components, const png_bytep  d1, int  w1, int  h1, png_bytep  d2, int  w2, int  h2  )

static

Definition at line 109 of file glpng.c.

References y.

Referenced by pngLoadF().

static int HalfSize ( GLint  components, GLint  width, GLint  height, const unsigned char *  data, unsigned char *  d, int  filter  )

static

Definition at line 150 of file glpng.c.

References GET, line, and y.

Referenced by Build2DMipmaps().

static void Build2DMipmaps ( GLint  components, GLint  width, GLint  height, GLenum  format, const unsigned char *  data, int  filter  )

static

Definition at line 232 of file glpng.c.

References HalfSize().

Referenced by pngLoadF().

static int APIENTRY pngLoadF ( FILE *  fp, int  mipmap, int  trans, pngInfo *  pinfo  )

static

Definition at line 252 of file glpng.c.

References pngInfo::Alpha, ALPHA, AlphaCallback, Build2DMipmaps(), checkForGammaEnv(), pngInfo::Depth, FOREND, FORSTART, GLPNG_ALPHA, GLPNG_BLEND1, GLPNG_BLEND2, GLPNG_BLEND3, GLPNG_BLEND4, GLPNG_BLEND5, GLPNG_BLEND6, GLPNG_BLEND7, GLPNG_BUILDMIPMAPS, GLPNG_CALLBACK, GLPNG_CHECK_SIG, GLPNG_SIMPLEMIPMAPS, GLPNG_SOLID, GLPNG_STENCIL, pngInfo::Height, info, MaxTextureSize, Resize(), SafeSize(), screenGamma, StencilBlue, StencilGreen, StencilRed, and pngInfo::Width.

Referenced by pngLoad().

static int APIENTRY pngLoad ( const char *  filename, int  mipmap, int  trans, pngInfo *  pinfo  )

static

Definition at line 542 of file glpng.c.

References pngLoadF(), and result.

Referenced by pngBind().

static unsigned int SetParams ( int  wrapst, int  magfilter, int  minfilter  )

static

Definition at line 554 of file glpng.c.

References id.

Referenced by pngBind().

unsigned int APIENTRY pngBind	(	const char *	filename,
		int	mipmap,
		int	trans,
		pngInfo *	info,
		int	wrapst,
		int	minfilter,
		int	magfilter
	)

Definition at line 569 of file glpng.c.

References id, pngLoad(), and SetParams().

Variable Documentation

unsigned char StencilRed = 0

static

Definition at line 56 of file glpng.c.

Referenced by pngLoadF().

unsigned char StencilGreen = 0

static

Definition at line 56 of file glpng.c.

Referenced by pngLoadF().

unsigned char StencilBlue = 0

static

Definition at line 56 of file glpng.c.

Referenced by pngLoadF().

unsigned char(* AlphaCallback)(unsigned char red, unsigned char green, unsigned char blue) = DefaultAlphaCallback

static

Definition at line 57 of file glpng.c.

Referenced by pngLoadF().

int StandardOrientation = 0

static

Definition at line 58 of file glpng.c.

int PalettedTextures = -1

static

Definition at line 66 of file glpng.c.

GLint MaxTextureSize = 0

static

Definition at line 67 of file glpng.c.

Referenced by pngLoadF(), and SafeSize().

double screenGamma = 2.2 / 1.0

static

Definition at line 78 of file glpng.c.

Referenced by checkForGammaEnv(), and pngLoadF().

char gammaExplicit = 0

static

Definition at line 81 of file glpng.c.