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// Geoffrey Furnish
// 5 May 1991
//
// This file contains definitions of constants and structures which
// are needed by the PLplot metafile writer and renderer.
//
//
// PLMETA_HEADER holds the magic string at head of metafile.
// PLMETA_VERSION holds the version number (year & letter).
//
// Note: All strings written into the file header are limited to a maximum
// of 80 characters.
//
#define PLMETA_HEADER "PLPLOT"
#define PLMETA_VERSION "2005a"
// These are used by the TK driver client/server code
#define PLSERV_HEADER "PLPLOT"
#define PLSERV_VERSION "2005b"
// Symbolic constants for old metafile versions (prior to 1992a).
// Now these are stored in the metafile header.
#define PLMETA_X_OLD 10000
#define PLMETA_Y_OLD 10000
// Virtual dots/mm for our virtual display space.
#define PIXEL_RES_X_OLD 42
#define PIXEL_RES_Y_OLD 56
// Macros to make it easier to abort on nonzero return code
// Can't call plexit on a write failure since that would be circular
#define plm_wr( code ) \
if ( code ) { fprintf( stderr, "Unable to write to MetaFile\n" ); exit( 1 ); }
#define plm_rd( code ) \
if ( code ) plexit( "Unable to read from MetaFile" )
//
// Metafile commands.
//
//** NOTICE !!! ***
// If you change ANY of the following, you will wreck backward
// backward compatibility with old metafiles. You may add, but do
// NOT delete !!!
//
#define INITIALIZE 1
#define CLOSE 2
#define SWITCH_TO_TEXT 3 // Obsolete, replaced by ESCAPE
#define SWITCH_TO_GRAPH 4 // Obsolete, replaced by ESCAPE
#define EOP 5
#define BOP 6
#define NEW_COLOR 7 // Obsolete, replaced by CHANGE_STATE
#define NEW_WIDTH 8 // Obsolete, replaced by CHANGE_STATE
#define LINE 9
#define LINETO 10
#define ESCAPE 11
#define ADVANCE 12 // Obsolete, BOP/EOP used instead
#define POLYLINE 13
#define NEW_COLOR0 NEW_COLOR
#define NEW_COLOR1 14
#define CHANGE_STATE 15
#define BOP0 16 // First BOP in a file
#define DRIVER_INTERFACE 17
#define SETSUB 18
#define SSUB 19
#define CLIP 20
#define END_OF_FIELD 255
// Data structures
// Metafile index data structure
typedef struct
{
U_SHORT pages;
} PLmIndex;
// plmeta output device data structure. Define it here so that
// it can be shared between the input/output modules.
typedef struct
{
PLFLT pxlx, pxly;
PLINT xold, yold;
PLINT xmin, xmax, xlen;
PLINT ymin, ymax, ylen;
FPOS_T index_offset; // Position of the metafile index
FPOS_T lp_offset; // Position of the previous page
int notfirst;
PLINT version; // Metafile version number
U_SHORT page; // Current page
// Metafile coordinates to physical (virtual pixels) coordinates
// transformation
PLFLT mfpcxa, mfpcxb; // x = mfpcxa * x + mfpcxb
PLFLT mfpcya, mfpcyb; // y = mfpcya * y + mfpcyb
// Temporary storage used for metafile processing.
void * buffer;
size_t buffer_size;
} PLmDev;
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