jccolor.c File Reference

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

Go to the source code of this file.

Macros
#define	JPEG_INTERNALS
#define	SCALEBITS   16 /* speediest right-shift on some machines */
#define	CBCR_OFFSET   ((INT32) CENTERJSAMPLE << SCALEBITS)
#define	ONE_HALF   ((INT32) 1 << (SCALEBITS-1))
#define	FIX(x)   ((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
#define	R_Y_OFF   0 /* offset to R => Y section */
#define	G_Y_OFF   (1*(MAXJSAMPLE+1)) /* offset to G => Y section */
#define	B_Y_OFF   (2*(MAXJSAMPLE+1)) /* etc. */
#define	R_CB_OFF   (3*(MAXJSAMPLE+1))
#define	G_CB_OFF   (4*(MAXJSAMPLE+1))
#define	B_CB_OFF   (5*(MAXJSAMPLE+1))
#define	R_CR_OFF   B_CB_OFF /* B=>Cb, R=>Cr are the same */
#define	G_CR_OFF   (6*(MAXJSAMPLE+1))
#define	B_CR_OFF   (7*(MAXJSAMPLE+1))
#define	TABLE_SIZE   (8*(MAXJSAMPLE+1))

Typedefs
typedef my_color_converter *	my_cconvert_ptr

Functions
	rgb_ycc_start (j_compress_ptr cinfo)
	rgb_ycc_convert (j_compress_ptr cinfo, JSAMPARRAY input_buf, JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)
	rgb_gray_convert (j_compress_ptr cinfo, JSAMPARRAY input_buf, JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)
	cmyk_ycck_convert (j_compress_ptr cinfo, JSAMPARRAY input_buf, JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)
	grayscale_convert (j_compress_ptr cinfo, JSAMPARRAY input_buf, JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)
	null_convert (j_compress_ptr cinfo, JSAMPARRAY input_buf, JSAMPIMAGE output_buf, JDIMENSION output_row, int num_rows)
	null_method (j_compress_ptr cinfo)
	jinit_color_converter (j_compress_ptr cinfo)

Macro Definition Documentation

B_CB_OFF

#define B_CB_OFF   (5*(MAXJSAMPLE+1))

Definition at line 74 of file jccolor.c.

Referenced by cmyk_ycck_convert(), rgb_ycc_convert(), and rgb_ycc_start().

B_CR_OFF

#define B_CR_OFF   (7*(MAXJSAMPLE+1))

Definition at line 77 of file jccolor.c.

Referenced by cmyk_ycck_convert(), rgb_ycc_convert(), and rgb_ycc_start().

B_Y_OFF

#define B_Y_OFF   (2*(MAXJSAMPLE+1)) /* etc. */

Definition at line 71 of file jccolor.c.

Referenced by cmyk_ycck_convert(), rgb_gray_convert(), rgb_ycc_convert(), and rgb_ycc_start().

CBCR_OFFSET

#define CBCR_OFFSET   ((INT32) CENTERJSAMPLE << SCALEBITS)

Definition at line 59 of file jccolor.c.

Referenced by rgb_ycc_start().

FIX

#define FIX

(

x

)

((INT32) ((x) * (1L<<SCALEBITS) + 0.5))

Definition at line 61 of file jccolor.c.

Referenced by rgb_ycc_start().

G_CB_OFF

#define G_CB_OFF   (4*(MAXJSAMPLE+1))

Definition at line 73 of file jccolor.c.

Referenced by cmyk_ycck_convert(), rgb_ycc_convert(), and rgb_ycc_start().

G_CR_OFF

#define G_CR_OFF   (6*(MAXJSAMPLE+1))

Definition at line 76 of file jccolor.c.

Referenced by cmyk_ycck_convert(), rgb_ycc_convert(), and rgb_ycc_start().

G_Y_OFF

#define G_Y_OFF   (1*(MAXJSAMPLE+1)) /* offset to G => Y section */

Definition at line 70 of file jccolor.c.

Referenced by cmyk_ycck_convert(), rgb_gray_convert(), rgb_ycc_convert(), and rgb_ycc_start().

JPEG_INTERNALS

#define JPEG_INTERNALS

Definition at line 11 of file jccolor.c.

ONE_HALF

#define ONE_HALF   ((INT32) 1 << (SCALEBITS-1))

Definition at line 60 of file jccolor.c.

Referenced by rgb_ycc_start().

R_CB_OFF

#define R_CB_OFF   (3*(MAXJSAMPLE+1))

Definition at line 72 of file jccolor.c.

Referenced by cmyk_ycck_convert(), rgb_ycc_convert(), and rgb_ycc_start().

R_CR_OFF

#define R_CR_OFF   B_CB_OFF /* B=>Cb, R=>Cr are the same */

Definition at line 75 of file jccolor.c.

Referenced by cmyk_ycck_convert(), and rgb_ycc_convert().

R_Y_OFF

#define R_Y_OFF   0 /* offset to R => Y section */

Definition at line 69 of file jccolor.c.

Referenced by cmyk_ycck_convert(), rgb_gray_convert(), rgb_ycc_convert(), and rgb_ycc_start().

SCALEBITS

#define SCALEBITS   16 /* speediest right-shift on some machines */

Definition at line 58 of file jccolor.c.

Referenced by cmyk_ycck_convert(), rgb_gray_convert(), and rgb_ycc_convert().

TABLE_SIZE

#define TABLE_SIZE   (8*(MAXJSAMPLE+1))

Definition at line 78 of file jccolor.c.

Referenced by rgb_ycc_start().

Typedef Documentation

my_cconvert_ptr

typedef my_color_converter* my_cconvert_ptr

Definition at line 25 of file jccolor.c.

Function Documentation

cmyk_ycck_convert()

cmyk_ycck_convert	(	j_compress_ptr	cinfo,
		JSAMPARRAY	input_buf,
		JSAMPIMAGE	output_buf,
		JDIMENSION	output_row,
		int	num_rows
	)

Definition at line 225 of file jccolor.c.

References B_CB_OFF, B_CR_OFF, B_Y_OFF, G_CB_OFF, G_CR_OFF, G_Y_OFF, GETJSAMPLE, MAXJSAMPLE, METHODDEF, num_cols, num_rows, output_buf, output_row, R_CB_OFF, R_CR_OFF, R_Y_OFF, and SCALEBITS.

Referenced by jinit_color_converter().

grayscale_convert()

grayscale_convert	(	j_compress_ptr	cinfo,
		JSAMPARRAY	input_buf,
		JSAMPIMAGE	output_buf,
		JDIMENSION	output_row,
		int	num_rows
	)

Definition at line 280 of file jccolor.c.

References METHODDEF, num_cols, num_rows, output_buf, and output_row.

Referenced by jinit_color_converter().

jinit_color_converter()

jinit_color_converter

(

j_compress_ptr

cinfo

)

Definition at line 352 of file jccolor.c.

References cmyk_ycck_convert(), ERREXIT, grayscale_convert(), JCS_CMYK, JCS_GRAYSCALE, JCS_RGB, JCS_YCbCr, JCS_YCCK, JPOOL_IMAGE, null_convert(), null_method(), rgb_gray_convert(), rgb_ycc_convert(), rgb_ycc_start(), and SIZEOF.

Referenced by jinit_compress_master().

null_convert()

null_convert	(	j_compress_ptr	cinfo,
		JSAMPARRAY	input_buf,
		JSAMPIMAGE	output_buf,
		JDIMENSION	output_row,
		int	num_rows
	)

Definition at line 309 of file jccolor.c.

References METHODDEF, num_cols, num_rows, output_buf, and output_row.

Referenced by jinit_color_converter().

null_method()

null_method

(

j_compress_ptr

cinfo

)

Definition at line 341 of file jccolor.c.

References GLOBAL.

Referenced by jinit_color_converter().

rgb_gray_convert()

rgb_gray_convert	(	j_compress_ptr	cinfo,
		JSAMPARRAY	input_buf,
		JSAMPIMAGE	output_buf,
		JDIMENSION	output_row,
		int	num_rows
	)

Definition at line 186 of file jccolor.c.

References B_Y_OFF, G_Y_OFF, GETJSAMPLE, METHODDEF, num_cols, num_rows, output_buf, output_row, R_Y_OFF, and SCALEBITS.

Referenced by jinit_color_converter().

rgb_ycc_convert()

rgb_ycc_convert	(	j_compress_ptr	cinfo,
		JSAMPARRAY	input_buf,
		JSAMPIMAGE	output_buf,
		JDIMENSION	output_row,
		int	num_rows
	)

Definition at line 130 of file jccolor.c.

References B_CB_OFF, B_CR_OFF, B_Y_OFF, G_CB_OFF, G_CR_OFF, G_Y_OFF, GETJSAMPLE, METHODDEF, num_cols, num_rows, output_buf, output_row, R_CB_OFF, R_CR_OFF, R_Y_OFF, and SCALEBITS.

Referenced by jinit_color_converter().

rgb_ycc_start()

rgb_ycc_start

(

j_compress_ptr

cinfo

)

Definition at line 86 of file jccolor.c.

References B_CB_OFF, B_CR_OFF, B_Y_OFF, CBCR_OFFSET, FIX, G_CB_OFF, G_CR_OFF, G_Y_OFF, i, JPOOL_IMAGE, MAXJSAMPLE, METHODDEF, ONE_HALF, R_CB_OFF, R_Y_OFF, SIZEOF, and TABLE_SIZE.

Referenced by jinit_color_converter().