/usr/include/cgm/cgm_implem.h is in libxgks-dev 2.6.1+dfsg.2-3ubuntu1.
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* This file contains implementation-specific definitions and declarations
* for the Computer Graphics Metatafile (CGM) implementaion of an XGKS
* Metafile.
*
* $Id: cgm_implem.h,v 2.5.4.1 1993/03/10 19:44:25 steve Exp $
*/
#ifndef CGM_IMPLEM_H_SEEN
#define CGM_IMPLEM_H_SEEN
/*
* A CGM direct color:
*/
typedef struct cgm_direct_color {
int red; /* Less than 0 implies RGB value not set */
int green;
int blue;
} cgm_direct_color;
/*
* A CGM color (either direct or indexed, depending on color selection mode):
*/
typedef union cgm_color {
int index;
cgm_direct_color direct;
} cgm_color;
/*
* Output CGM modes:
*/
typedef enum cgmo_mode {
CGMO_UNSET = 0,
CGMO_IN_METAFILE, /* BEGIN PICTURE not yet seen */
CGMO_IN_PICTURE, /* BEGIN PICTURE seen */
CGMO_IN_BODY, /* BEGIN PICTURE BODY seen */
CGMO_NOT_EMPTY /* Graphic written to view surface */
} cgmo_mode;
#define IS_UNSET(cgmo) (cgmo->mode == CGMO_UNSET)
#define IS_IN_METAFILE(cgmo) (cgmo->mode == CGMO_IN_METAFILE)
#define IS_IN_PICTURE(cgmo) (cgmo->mode == CGMO_IN_PICTURE)
#define IS_IN_BODY(cgmo) (cgmo->mode == CGMO_IN_BODY || \
cgmo->mode == CGMO_NOT_EMPTY)
#define IS_NOT_EMPTY(cgmo) (cgmo->mode == CGMO_NOT_EMPTY)
/*
* Workstation information specific to output Computer Graphics Metafiles
* (CGMOs):
*/
typedef struct mf_cgmo {
MF_COMMON
struct ws_struct
*ws; /* Associated workstation structure */
cgmo_mode mode; /* Output CGM mode */
int picture_number; /* Origin-1 picture number */
unsigned long
setmask;
# define CGM_MASK_BACKCOLR (unsigned long)(1 << 0)
# define CGM_MASK_LINEINDEX (unsigned long)(1 << 1)
# define CGM_MASK_LINETYPE (unsigned long)(1 << 2)
# define CGM_MASK_LINEWIDTH (unsigned long)(1 << 3)
# define CGM_MASK_LINECOLR (unsigned long)(1 << 4)
# define CGM_MASK_MARKERINDEX (unsigned long)(1 << 5)
# define CGM_MASK_MARKERTYPE (unsigned long)(1 << 6)
# define CGM_MASK_MARKERSIZE (unsigned long)(1 << 7)
# define CGM_MASK_MARKERCOLR (unsigned long)(1 << 8)
# define CGM_MASK_TEXTINDEX (unsigned long)(1 << 9)
# define CGM_MASK_TEXTFONTINDEX (unsigned long)(1 << 10)
# define CGM_MASK_TEXTPREC (unsigned long)(1 << 11)
# define CGM_MASK_CHAREXPAN (unsigned long)(1 << 12)
# define CGM_MASK_CHARSPACE (unsigned long)(1 << 13)
# define CGM_MASK_TEXTCOLR (unsigned long)(1 << 14)
# define CGM_MASK_CHARHEIGHT (unsigned long)(1 << 15)
# define CGM_MASK_CHARORI (unsigned long)(1 << 16)
# define CGM_MASK_TEXTPATH (unsigned long)(1 << 17)
# define CGM_MASK_TEXTALIGN (unsigned long)(1 << 18)
# define CGM_MASK_FILLINDEX (unsigned long)(1 << 19)
# define CGM_MASK_INTSTYLE (unsigned long)(1 << 20)
# define CGM_MASK_FILLCOLR (unsigned long)(1 << 21)
# define CGM_MASK_HATCHINDEX (unsigned long)(1 << 22)
# define CGM_MASK_PATINDEX (unsigned long)(1 << 23)
# define CGM_MASK_PATSIZE (unsigned long)(1 << 24)
# define CGM_MASK_COLRTABLE (unsigned long)(1 << 25)
Gcobundl backcolr; /* Background color */
int lineindex; /* Line bundle index */
int linetype; /* Line type */
float linewidth; /* Line width */
cgm_color linecolr; /* Line color */
int markerindex; /* Marker bundle index */
int markertype; /* Marker type */
float markersize; /* Marker size */
cgm_color markercolr; /* Marker color */
int textindex; /* Text bundle index */
Gtxfp txfp; /* Text font index and precision */
float charexpan; /* Character expansion factor */
float charspace; /* Inter-character spacing */
cgm_color textcolr; /* Text color index */
float charheight; /* Character height */
float charori[4]; /* Character orientation */
Gtxpath textpath; /* Text path */
Gtxalign textalign; /* Text alignment */
int fillindex; /* Fill bundle index */
Gflinter intstyle; /* Interior fill style */
cgm_color fillcolr; /* Fill color */
int hatchindex; /* Hatch index */
int patindex; /* Pattern index */
} mf_cgmo;
/*
* Workstation information specific to input Computer Graphics Metafiles
* (CGMIs):
*/
typedef struct mf_cgmi {
MF_COMMON
long total_length; /* Total amount of data (excludes
* padding) */
long total_left; /* Total amount of data left (excludes
* padding) */
int partition_length; /* Amount of data in current partition
* (excludes padding) */
int partition_left; /* Amount left in current partition
* (excludes padding) */
long start_this_element; /* File-offset to current element */
long start_next_element; /* File-offset to next element */
int mode; /* CGMI mode */
# define NORMAL_MODE 0
# define READING_COLOR_TABLE 1
int class; /* Command class of current element */
int id; /* Element ID of current element */
int hash_id; /* Element class and id combination */
Glimit clip_rect; /* Clipping rectangle */
Gtxfp txfp; /* Text font and precision */
Gpoint char_up; /* Character up vector */
Gpoint char_base; /* Character base vector */
Gfloat char_height; /* Character height */
int color_index; /* Color table index */
} mf_cgmi;
/*
* CGM version:
*/
#define MFVERSION 1
#undef MIN
#define MIN(a,b) ((a) < (b) ? (a) : (b))
#define ABS(x) ((x) < 0 ? -(x) : (x))
#define SIGN(a,b) ((a) < 0 ? -ABS(b) : ABS(b))
/*
* Convert between a floating-point representation in the range from
* zero through one (or minus one through one) and an integral representation.
*/
#define NORM_TO_INT(mod, fval) SIGN(fval, ((long)(ABS(fval)*((mod)-1) + .5)))
#define UNORM_TO_INT(mod, fval) MIN((mod)-1, (unsigned long)((fval)*(mod)))
#define INT_TO_NORM(mod, ival) ((double)(ival)/((mod)-1))
#define UINT_TO_NORM(mod, ival) (.5/(mod) + (double)(ival)/(mod))
#define UNORM_TO_INT8(fval) UNORM_TO_INT(256, fval)
#define NORM_TO_INT16(fval) NORM_TO_INT((unsigned)(1<<15), fval)
#define UNORM_TO_INT16(fval) UNORM_TO_INT((unsigned long)(1<<16), fval)
#define UINT8_TO_NORM(ival) UINT_TO_NORM(256, ival)
#define UINT16_TO_NORM(ival) UINT_TO_NORM((unsigned long)(1<<16), ival)
/*
* Convert between host and network byte orders for 16-bit quantities.
*/
#define NTOH16(n) (((n)[0] << 8) | (n)[1])
#define HTON16(h, n) GKS_STMT((n)[0] = MS_8(h); (n)[1] = LS_8(h);)
/*
* Miscellaneous utility macros:
*/
#define ABS(x) ((x) < 0 ? -(x) : (x))
#define HYPOT(x,y) sqrt((double)((x)*(x) + (y)*(y)))
#define NUM_ELEMENTS(a) (sizeof(a) / sizeof(a[0]))
#define MSB_16 ((unsigned)1 << 15)
/* 16-bit most significant bit */
#define MASK_16 (unsigned)0177777
/* 16-bit mask */
#define LS_8(val) ((val) & 0377) /* least significant 8 bits */
#define MS_8(val) LS_8((val) >> 8)/* most significant 8 bits */
#define ROUNDUP(x, y) (((x + y - 1)/y)*y)
#define JUST_AFTER(ptr, type, align) \
(align *)((char*)ptr + \
ROUNDUP(sizeof(type), sizeof(align)))
/*
* Macros for converting between the host and two's-complement forms of a
* 16-bit integer:
*/
#define HTOTS(s_shrt) (MASK_16 & (unsigned short)(s_shrt))
#define TTOHS(u_shrt) ((unsigned)(u_shrt) & MSB_16 \
? (long)0-(unsigned short) \
(MASK_16 & (~(unsigned)(u_shrt) + 1)) \
: (long)(u_shrt))
/*
* Miscellaneous, CGM-specific macros:
*/
#define MAX_SHORT_CMD_LENGTH 30 /* Max bytes in a short command */
#define LONG_CMD_LENGTH 31 /* Long command "length"-value */
#define MAX_SHORT_STR_LENGTH 254 /* Max bytes in a short string */
#define LONG_STR_LENGTH 255 /* Long string "length"-value */
#define MORE_DATA_BIT (1 << 15)
#define BYTES_LEFT(mi) (mi->total_left)
#define HASH_ID(class, id) (((unsigned)(class) << 7) | (unsigned)(id))
#define PACKED_LIST 1 /* Cell representation mode. */
#define CGM_CONTINUOUS_HORIZONTAL_ALIGNMENT \
4
#define CGM_CONTINUOUS_VERTICAL_ALIGNMENT \
6
/*
* Defaults:
*/
#define DEFAULT_COLRPREC 8 /* Color precision */
#define DEFAULT_CELL_REP_MODE PACKED_LIST
#define DEFAULT_VDCINTEGERPREC 16 /* VDC integer precision */
#define DEFAULT_COLRMODE 0 /* Indexed */
/*
* Command class values:
*/
#define DELIMITER_CL 0
#define MF_DESCRIPTOR_CL 1
#define PIC_DESCRIPTOR_CL 2
#define CONTROL_CL 3
#define PRIMITIVE_CL 4
#define ATTRIBUTE_CL 5
#define ESCAPE_CL 6
#define EXTERN_CL 7
/*
* Element-ID values. Together with the command-class, these uniquely
* identify an individual command. The names are taken from the CLEAR
* TEXT encoding (with "_ID" appended).
*/
/* Delimiter Elements: */
#define BEGMF_ID 1
#define ENDMF_ID 2
#define BEGPIC_ID 3
#define BEGPICBODY_ID 4
#define ENDPIC_ID 5
/* Metafile Descriptor Elements: */
#define MFVERSION_ID 1
#define MFDESC_ID 2
#define MFELEMLIST_ID 11
/* Picture Descriptor Elements: */
#define COLRMODE_ID 2
#define VDCEXT_ID 6
#define BACKCOLR_ID 7
/* Control Elements: */
#define VDCINTEGERPREC_ID 1
#define CLIPRECT_ID 5
#define CLIP_ID 6
/* Graphical Primitive Elements: */
#define LINE_ID 1
#define MARKER_ID 3
#define TEXT_ID 4
#define POLYGON_ID 7
#define CELLARRAY_ID 9
/* Primitive Attribute Elements: */
#define LINEINDEX_ID 1
#define LINETYPE_ID 2
#define LINEWIDTH_ID 3
#define LINECOLR_ID 4
#define MARKERINDEX_ID 5
#define MARKERTYPE_ID 6
#define MARKERSIZE_ID 7
#define MARKERCOLR_ID 8
#define TEXTINDEX_ID 9
#define TEXTFONTINDEX_ID 10
#define TEXTPREC_ID 11
#define CHAREXPAN_ID 12
#define CHARSPACE_ID 13
#define TEXTCOLR_ID 14
#define CHARHEIGHT_ID 15
#define CHARORI_ID 16
#define TEXTPATH_ID 17
#define TEXTALIGN_ID 18
#define CHARSETINDEX_ID 19
#define ALTCHARSETINDEX_ID 20
#define FILLINDEX_ID 21
#define INTSTYLE_ID 22
#define FILLCOLR_ID 23
#define HATCHINDEX_ID 24
#define PATINDEX_ID 25
#define FILLREFPT_ID 31
#define PATTABLE_ID 32
#define PATSIZE_ID 33
#define COLRTABLE_ID 34
#define ASF_ID 35
/* Escape Elements: */
#define ESCAPE_ID 1
/* External Elements: */
#define MESSAGE_ID 1
/*
* CGM element decoding mode:
*/
typedef enum decode_mode {
RETURN_INFO,
DECODE_VALUES
} decode_mode;
/*
* I/O buffer:
*/
extern unsigned char cgm_buf[];
/*
* CGM implementation-functions implemented as macros:
*/
#define size_point(cgm) (2*size_vdc(cgm))
#define size_vdc(cgm) size_int16()
#define size_int16() (size_t)2
#define size_direct_color() (size_t)3
#define size_cell() (size_t)(DEFAULT_COLRPREC/8)
#endif /* CGM_IMPLEM_H_SEEN not defined above */
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