opngreduc.c File Reference

#include "opngreduc.h"
#include <assert.h>

Macros
#define	OPNG_ASSERT(cond)   assert(cond)
#define	OPNG_ASSERT_MSG(cond, msg)   assert(cond)
#define	opng_debug(level, msg)   ((void)0)
#define	OPNG_CMP_RGB(R1, G1, B1, R2, G2, B2)
#define	OPNG_CMP_ARGB(A1, R1, G1, B1, A2, R2, G2, B2)

Functions
static int	opng_insert_palette_entry (png_colorp palette, int *num_palette, png_bytep trans_alpha, int *num_trans, int max_tuples, unsigned int red, unsigned int green, unsigned int blue, unsigned int alpha, int *index)
static void	opng_get_alpha_row (png_row_infop row_info_ptr, png_color_16p trans_color, png_bytep row, png_bytep alpha_row)
static png_uint_32	opng_analyze_bits (png_structp png_ptr, png_infop info_ptr, png_uint_32 reductions)
static png_uint_32	opng_reduce_bits (png_structp png_ptr, png_infop info_ptr, png_uint_32 reductions)
static png_uint_32	opng_reduce_palette_bits (png_structp png_ptr, png_infop info_ptr, png_uint_32 reductions)
static png_uint_32	opng_reduce_to_palette (png_structp png_ptr, png_infop info_ptr, png_uint_32 reductions)
static void	opng_analyze_sample_usage (png_structp png_ptr, png_infop info_ptr, png_bytep usage_map)
static void	opng_set_num_palette (png_structp png_ptr, png_infop info_ptr, int num_palette)
static void	opng_set_num_trans (png_structp png_ptr, png_infop info_ptr, int num_trans)
static png_uint_32	opng_reduce_palette (png_structp png_ptr, png_infop info_ptr, png_uint_32 reductions)
png_uint_32 PNGAPI	opng_reduce_image (png_structp png_ptr, png_infop info_ptr, png_uint_32 reductions)

Macro Definition Documentation

#define OPNG_ASSERT

(

cond)

assert(cond)

#define OPNG_ASSERT_MSG	(		cond,
			msg
	)		assert(cond)

#define OPNG_CMP_ARGB	(		A1,
			R1,
			G1,
			B1,
			A2,
			R2,
			G2,
			B2
	)

Value:

(((int)(A1) != (int)(A2)) ?          \
      ((int)(A1) - (int)(A2)) :         \
      (((int)(R1) != (R2)) ?            \
         ((int)(R1) - (int)(R2)) :      \
         (((int)(G1) != (int)(G2)) ?    \
            ((int)(G1) - (int)(G2)) :   \
            ((int)(B1) - (int)(B2)))))

#define OPNG_CMP_RGB	(		R1,
			G1,
			B1,
			R2,
			G2,
			B2
	)

Value:

(((int)(R1) != (int)(R2)) ?      \
      ((int)(R1) - (int)(R2)) :     \
      (((int)(G1) != (int)(G2)) ?   \
         ((int)(G1) - (int)(G2)) :  \
         ((int)(B1) - (int)(B2))))

#define opng_debug	(		level,
			msg
	)		((void)0)

Function Documentation

static png_uint_32 opng_analyze_bits ( png_structp  png_ptr, png_infop  info_ptr, png_uint_32  reductions  )

static

static void opng_analyze_sample_usage ( png_structp  png_ptr, png_infop  info_ptr, png_bytep  usage_map  )

static

static void opng_get_alpha_row ( png_row_infop  row_info_ptr, png_color_16p  trans_color, png_bytep  row, png_bytep  alpha_row  )

static

static int opng_insert_palette_entry ( png_colorp  palette, int *  num_palette, png_bytep  trans_alpha, int *  num_trans, int  max_tuples, unsigned int  red, unsigned int  green, unsigned int  blue, unsigned int  alpha, int *  index  )

static

static png_uint_32 opng_reduce_bits ( png_structp  png_ptr, png_infop  info_ptr, png_uint_32  reductions  )

static

png_uint_32 PNGAPI opng_reduce_image	(	png_structp	png_ptr,
		png_infop	info_ptr,
		png_uint_32	reductions
	)

static png_uint_32 opng_reduce_palette ( png_structp  png_ptr, png_infop  info_ptr, png_uint_32  reductions  )

static

static png_uint_32 opng_reduce_palette_bits ( png_structp  png_ptr, png_infop  info_ptr, png_uint_32  reductions  )

static

static png_uint_32 opng_reduce_to_palette ( png_structp  png_ptr, png_infop  info_ptr, png_uint_32  reductions  )

static

static void opng_set_num_palette ( png_structp  png_ptr, png_infop  info_ptr, int  num_palette  )

static

static void opng_set_num_trans ( png_structp  png_ptr, png_infop  info_ptr, int  num_trans  )

static