jquant1.c File Reference

#include "jinclude.h"
#include "jpeglib.h"

Go to the source code of this file.

Macros
#define	JPEG_INTERNALS
#define	ODITHER_SIZE   16 /* dimension of dither matrix */
#define	ODITHER_CELLS   (ODITHER_SIZE*ODITHER_SIZE) /* # cells in matrix */
#define	ODITHER_MASK   (ODITHER_SIZE-1) /* mask for wrapping around counters */
#define	MAX_Q_COMPS   4 /* max components I can handle */

Typedefs
typedef int	ODITHER_MATRIX[ODITHER_SIZE][ODITHER_SIZE]
typedef int(*	ODITHER_MATRIX_PTR)[ODITHER_SIZE]
typedef INT16	FSERROR
typedef int	LOCFSERROR
typedef FSERROR FAR *	FSERRPTR
typedef my_cquantizer *	my_cquantize_ptr

Functions
	select_ncolors (j_decompress_ptr cinfo, int Ncolors[])
	output_value (j_decompress_ptr cinfo, int ci, int j, int maxj)
	largest_input_value (j_decompress_ptr cinfo, int ci, int j, int maxj)
	create_colormap (j_decompress_ptr cinfo)
	create_colorindex (j_decompress_ptr cinfo)
	make_odither_array (j_decompress_ptr cinfo, int ncolors)
	create_odither_tables (j_decompress_ptr cinfo)
	color_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
	color_quantize3 (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
	quantize_ord_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
	quantize3_ord_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
	quantize_fs_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
	alloc_fs_workspace (j_decompress_ptr cinfo)
	start_pass_1_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
	finish_pass_1_quant (j_decompress_ptr cinfo)
	new_color_map_1_quant (j_decompress_ptr cinfo)
	jinit_1pass_quantizer (j_decompress_ptr cinfo)

Macro Definition Documentation

JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 13 of file jquant1.c.

MAX_Q_COMPS

#define MAX_Q_COMPS   4 /* max components I can handle */

Definition at line 140 of file jquant1.c.

Referenced by jinit_1pass_quantizer().

ODITHER_CELLS

#define ODITHER_CELLS   (ODITHER_SIZE*ODITHER_SIZE) /* # cells in matrix */

Definition at line 73 of file jquant1.c.

Referenced by make_odither_array().

ODITHER_MASK

#define ODITHER_MASK   (ODITHER_SIZE-1) /* mask for wrapping around counters */

Definition at line 74 of file jquant1.c.

Referenced by quantize3_ord_dither(), and quantize_ord_dither().

ODITHER_SIZE

#define ODITHER_SIZE   16 /* dimension of dither matrix */

Definition at line 71 of file jquant1.c.

Referenced by make_odither_array().

Typedef Documentation

FSERROR

typedef INT16 FSERROR

Definition at line 128 of file jquant1.c.

FSERRPTR

typedef FSERROR FAR* FSERRPTR

Definition at line 135 of file jquant1.c.

LOCFSERROR

typedef int LOCFSERROR

Definition at line 129 of file jquant1.c.

my_cquantize_ptr

typedef my_cquantizer* my_cquantize_ptr

Definition at line 167 of file jquant1.c.

ODITHER_MATRIX

typedef int ODITHER_MATRIX[ODITHER_SIZE][ODITHER_SIZE]

Definition at line 76 of file jquant1.c.

ODITHER_MATRIX_PTR

typedef int(* ODITHER_MATRIX_PTR)[ODITHER_SIZE]

Definition at line 77 of file jquant1.c.

Function Documentation

alloc_fs_workspace()

alloc_fs_workspace

(

j_decompress_ptr

cinfo

)

Definition at line 722 of file jquant1.c.

References i, JPOOL_IMAGE, METHODDEF, and SIZEOF.

Referenced by jinit_1pass_quantizer(), and start_pass_1_quant().

color_quantize()

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

Definition at line 459 of file jquant1.c.

References for(), GETJSAMPLE, METHODDEF, num_rows, and output_buf.

Referenced by start_pass_1_quant().

color_quantize3()

color_quantize3	(	j_decompress_ptr	cinfo,
		JSAMPARRAY	input_buf,
		JSAMPARRAY	output_buf,
		int	num_rows
	)

Definition at line 487 of file jquant1.c.

References for(), GETJSAMPLE, METHODDEF, num_rows, and output_buf.

Referenced by start_pass_1_quant().

create_colorindex()

create_colorindex

(

j_decompress_ptr

cinfo

)

Definition at line 333 of file jquant1.c.

References FALSE, i, if(), JDITHER_ORDERED, JPOOL_IMAGE, largest_input_value(), LOCAL, MAXJSAMPLE, and TRUE.

Referenced by jinit_1pass_quantizer(), and start_pass_1_quant().

create_colormap()

create_colormap

(

j_decompress_ptr

cinfo

)

Definition at line 273 of file jquant1.c.

Referenced by jinit_1pass_quantizer().

create_odither_tables()

create_odither_tables

(

j_decompress_ptr

cinfo

)

Definition at line 432 of file jquant1.c.

References for(), i, make_odither_array(), METHODDEF, and NULL.

Referenced by start_pass_1_quant().

finish_pass_1_quant()

finish_pass_1_quant

(

j_decompress_ptr

cinfo

)

Definition at line 798 of file jquant1.c.

References METHODDEF.

Referenced by jinit_1pass_quantizer().

jinit_1pass_quantizer()

jinit_1pass_quantizer

(

j_decompress_ptr

cinfo

)

Definition at line 821 of file jquant1.c.

References alloc_fs_workspace(), create_colorindex(), create_colormap(), ERREXIT1, finish_pass_1_quant(), JDITHER_FS, JPOOL_IMAGE, MAX_Q_COMPS, MAXJSAMPLE, new_color_map_1_quant(), NULL, SIZEOF, and start_pass_1_quant().

Referenced by master_selection().

largest_input_value()

largest_input_value	(	j_decompress_ptr	cinfo,
		int	ci,
		int	j,
		int	maxj
	)

Definition at line 259 of file jquant1.c.

References LOCAL, and MAXJSAMPLE.

Referenced by create_colorindex().

make_odither_array()

make_odither_array	(	j_decompress_ptr	cinfo,
		int	ncolors
	)

Definition at line 396 of file jquant1.c.

References JPOOL_IMAGE, ODITHER_CELLS, ODITHER_SIZE, and SIZEOF.

Referenced by create_odither_tables().

new_color_map_1_quant()

new_color_map_1_quant

(

j_decompress_ptr

cinfo

)

Definition at line 810 of file jquant1.c.

References ERREXIT, and GLOBAL.

Referenced by jinit_1pass_quantizer().

output_value()

output_value	(	j_decompress_ptr	cinfo,
		int	ci,
		int	j,
		int	maxj
	)

Definition at line 245 of file jquant1.c.

References LOCAL, and MAXJSAMPLE.

quantize3_ord_dither()

quantize3_ord_dither	(	j_decompress_ptr	cinfo,
		JSAMPARRAY	input_buf,
		JSAMPARRAY	output_buf,
		int	num_rows
	)

Definition at line 565 of file jquant1.c.

References for(), GETJSAMPLE, METHODDEF, num_rows, ODITHER_MASK, and output_buf.

Referenced by start_pass_1_quant().

quantize_fs_dither()

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

Definition at line 610 of file jquant1.c.

References FALSE, FAR, for(), GETJSAMPLE, jzero_far(), LOCAL, num_rows, output_buf, RIGHT_SHIFT, SHIFT_TEMPS, SIZEOF, and TRUE.

Referenced by start_pass_1_quant().

quantize_ord_dither()

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

Definition at line 515 of file jquant1.c.

References FAR, for(), GETJSAMPLE, jzero_far(), METHODDEF, num_rows, ODITHER_MASK, output_buf, and SIZEOF.

Referenced by start_pass_1_quant().

select_ncolors()

select_ncolors	(	j_decompress_ptr	cinfo,
		int	Ncolors[]
	)

Definition at line 186 of file jquant1.c.

References ERREXIT1, FALSE, i, int, JCS_RGB, LOCAL, and TRUE.

start_pass_1_quant()

start_pass_1_quant	(	j_decompress_ptr	cinfo,
		boolean	is_pre_scan
	)

Definition at line 741 of file jquant1.c.

References alloc_fs_workspace(), color_quantize(), color_quantize3(), create_colorindex(), create_odither_tables(), ERREXIT, FALSE, FAR, i, JDITHER_FS, JDITHER_NONE, JDITHER_ORDERED, jzero_far(), METHODDEF, NULL, quantize3_ord_dither(), quantize_fs_dither(), quantize_ord_dither(), and SIZEOF.

Referenced by jinit_1pass_quantizer().