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Classes | Macros | Typedefs | Functions
jquant2.c File Reference
#include "jinclude.h"
#include "jpeglib.h"

Go to the source code of this file.

Classes

struct  my_cquantizer2
struct  box

Macros

#define JPEG_INTERNALS
#define R_SCALE   2 /* scale R distances by this much */
#define G_SCALE   3 /* scale G distances by this much */
#define B_SCALE   1 /* and B by this much */
#define C0_SCALE   R_SCALE
#define C1_SCALE   G_SCALE
#define C2_SCALE   B_SCALE
#define MAXNUMCOLORS   (MAXJSAMPLE+1) /* maximum size of colormap */
#define HIST_C0_BITS   5 /* bits of precision in R/B histogram */
#define HIST_C1_BITS   6 /* bits of precision in G histogram */
#define HIST_C2_BITS   5 /* bits of precision in B/R histogram */
#define HIST_C0_ELEMS   (1<<HIST_C0_BITS)
#define HIST_C1_ELEMS   (1<<HIST_C1_BITS)
#define HIST_C2_ELEMS   (1<<HIST_C2_BITS)
#define C0_SHIFT   (BITS_IN_JSAMPLE-HIST_C0_BITS)
#define C1_SHIFT   (BITS_IN_JSAMPLE-HIST_C1_BITS)
#define C2_SHIFT   (BITS_IN_JSAMPLE-HIST_C2_BITS)
#define BOX_C0_LOG   (HIST_C0_BITS-3)
#define BOX_C1_LOG   (HIST_C1_BITS-3)
#define BOX_C2_LOG   (HIST_C2_BITS-3)
#define BOX_C0_ELEMS   (1<<BOX_C0_LOG) /* # of hist cells in update box */
#define BOX_C1_ELEMS   (1<<BOX_C1_LOG)
#define BOX_C2_ELEMS   (1<<BOX_C2_LOG)
#define BOX_C0_SHIFT   (C0_SHIFT + BOX_C0_LOG)
#define BOX_C1_SHIFT   (C1_SHIFT + BOX_C1_LOG)
#define BOX_C2_SHIFT   (C2_SHIFT + BOX_C2_LOG)
#define STEP_C0   ((1 << C0_SHIFT) * C0_SCALE)
#define STEP_C1   ((1 << C1_SHIFT) * C1_SCALE)
#define STEP_C2   ((1 << C2_SHIFT) * C2_SCALE)
#define STEPSIZE   ((MAXJSAMPLE+1)/16)

Typedefs

typedef UINT16 histcell
typedef histcell FAR * histptr
typedef histcell hist1d[HIST_C2_ELEMS]
typedef hist1d FAR * hist2d
typedef hist2d * hist3d
typedef FSERROR FAR * FSERRPTR
typedef my_cquantizer2 * my_cquantize_ptr2
typedef box * boxptr

Functions

 prescan_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY, int num_rows)
 find_biggest_color_pop (boxptr boxlist, int numboxes)
 find_biggest_volume (boxptr boxlist, int numboxes)
 update_box (j_decompress_ptr cinfo, boxptr boxp)
 median_cut (j_decompress_ptr cinfo, boxptr boxlist, int numboxes, int desired_colors)
 compute_color (j_decompress_ptr cinfo, boxptr boxp, int icolor)
 select_colors (j_decompress_ptr cinfo, int desired_colors)
 find_nearby_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2, JSAMPLE colorlist[])
 find_best_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2, int numcolors, JSAMPLE colorlist[], JSAMPLE bestcolor[])
 fill_inverse_cmap (j_decompress_ptr cinfo, int c0, int c1, int c2)
 pass2_no_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
 pass2_fs_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
 init_error_limit (j_decompress_ptr cinfo)
 finish_pass1 (j_decompress_ptr cinfo)
 finish_pass2 (j_decompress_ptr)
 start_pass_2_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
 new_color_map_2_quant (j_decompress_ptr cinfo)
 jinit_2pass_quantizer (j_decompress_ptr cinfo)

Macro Definition Documentation

◆ B_SCALE

#define B_SCALE   1 /* and B by this much */

◆ BOX_C0_ELEMS

#define BOX_C0_ELEMS   (1<<BOX_C0_LOG) /* # of hist cells in update box */

◆ BOX_C0_LOG

#define BOX_C0_LOG   (HIST_C0_BITS-3)

◆ BOX_C0_SHIFT

#define BOX_C0_SHIFT   (C0_SHIFT + BOX_C0_LOG)

◆ BOX_C1_ELEMS

#define BOX_C1_ELEMS   (1<<BOX_C1_LOG)

◆ BOX_C1_LOG

#define BOX_C1_LOG   (HIST_C1_BITS-3)

◆ BOX_C1_SHIFT

#define BOX_C1_SHIFT   (C1_SHIFT + BOX_C1_LOG)

◆ BOX_C2_ELEMS

#define BOX_C2_ELEMS   (1<<BOX_C2_LOG)

◆ BOX_C2_LOG

#define BOX_C2_LOG   (HIST_C2_BITS-3)

◆ BOX_C2_SHIFT

#define BOX_C2_SHIFT   (C2_SHIFT + BOX_C2_LOG)

◆ C0_SCALE

#define C0_SCALE   R_SCALE

◆ C0_SHIFT

#define C0_SHIFT   (BITS_IN_JSAMPLE-HIST_C0_BITS)

◆ C1_SCALE

#define C1_SCALE   G_SCALE

◆ C1_SHIFT

#define C1_SHIFT   (BITS_IN_JSAMPLE-HIST_C1_BITS)

◆ C2_SCALE

#define C2_SCALE   B_SCALE

◆ C2_SHIFT

#define C2_SHIFT   (BITS_IN_JSAMPLE-HIST_C2_BITS)

◆ G_SCALE

#define G_SCALE   3 /* scale G distances by this much */

◆ HIST_C0_BITS

#define HIST_C0_BITS   5 /* bits of precision in R/B histogram */

◆ HIST_C0_ELEMS

#define HIST_C0_ELEMS   (1<<HIST_C0_BITS)

◆ HIST_C1_BITS

#define HIST_C1_BITS   6 /* bits of precision in G histogram */

◆ HIST_C1_ELEMS

#define HIST_C1_ELEMS   (1<<HIST_C1_BITS)

◆ HIST_C2_BITS

#define HIST_C2_BITS   5 /* bits of precision in B/R histogram */

◆ HIST_C2_ELEMS

#define HIST_C2_ELEMS   (1<<HIST_C2_BITS)

◆ JPEG_INTERNALS

#define JPEG_INTERNALS

◆ MAXNUMCOLORS

#define MAXNUMCOLORS   (MAXJSAMPLE+1) /* maximum size of colormap */

◆ R_SCALE

#define R_SCALE   2 /* scale R distances by this much */

◆ STEP_C0

#define STEP_C0   ((1 << C0_SHIFT) * C0_SCALE)

◆ STEP_C1

#define STEP_C1   ((1 << C1_SHIFT) * C1_SCALE)

◆ STEP_C2

#define STEP_C2   ((1 << C2_SHIFT) * C2_SCALE)

◆ STEPSIZE

#define STEPSIZE   ((MAXJSAMPLE+1)/16)

Typedef Documentation

◆ boxptr

typedef box* boxptr

◆ FSERRPTR

typedef FSERROR FAR* FSERRPTR

◆ hist1d

typedef histcell hist1d[HIST_C2_ELEMS]

◆ hist2d

typedef hist1d FAR* hist2d

◆ hist3d

typedef hist2d* hist3d

◆ histcell

typedef UINT16 histcell

◆ histptr

typedef histcell FAR* histptr

◆ my_cquantize_ptr2

typedef my_cquantizer2* my_cquantize_ptr2

Function Documentation

◆ compute_color()

compute_color ( j_decompress_ptr cinfo,
boxptr boxp,
int icolor )

◆ fill_inverse_cmap()

fill_inverse_cmap ( j_decompress_ptr cinfo,
int c0,
int c1,
int c2 )

◆ find_best_colors()

find_best_colors ( j_decompress_ptr cinfo,
int minc0,
int minc1,
int minc2,
int numcolors,
JSAMPLE colorlist[],
JSAMPLE bestcolor[] )

◆ find_biggest_color_pop()

find_biggest_color_pop ( boxptr boxlist,
int numboxes )

◆ find_biggest_volume()

find_biggest_volume ( boxptr boxlist,
int numboxes )

◆ find_nearby_colors()

find_nearby_colors ( j_decompress_ptr cinfo,
int minc0,
int minc1,
int minc2,
JSAMPLE colorlist[] )

◆ finish_pass1()

finish_pass1 ( j_decompress_ptr cinfo)

◆ finish_pass2()

finish_pass2 ( j_decompress_ptr )

◆ init_error_limit()

init_error_limit ( j_decompress_ptr cinfo)

◆ jinit_2pass_quantizer()

jinit_2pass_quantizer ( j_decompress_ptr cinfo)

◆ median_cut()

median_cut ( j_decompress_ptr cinfo,
boxptr boxlist,
int numboxes,
int desired_colors )

◆ new_color_map_2_quant()

new_color_map_2_quant ( j_decompress_ptr cinfo)

◆ pass2_fs_dither()

pass2_fs_dither ( j_decompress_ptr cinfo,
JSAMPARRAY input_buf,
JSAMPARRAY output_buf,
int num_rows )

◆ pass2_no_dither()

pass2_no_dither ( j_decompress_ptr cinfo,
JSAMPARRAY input_buf,
JSAMPARRAY output_buf,
int num_rows )

◆ prescan_quantize()

prescan_quantize ( j_decompress_ptr cinfo,
JSAMPARRAY input_buf,
JSAMPARRAY ,
int num_rows )

◆ select_colors()

select_colors ( j_decompress_ptr cinfo,
int desired_colors )

◆ start_pass_2_quant()

start_pass_2_quant ( j_decompress_ptr cinfo,
boolean is_pre_scan )

◆ update_box()

update_box ( j_decompress_ptr cinfo,
boxptr boxp )
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