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# EXPORT.H -- Main include file for the task structure.
# Main task structure.
define SZ_EXPSTRUCT 40
define SZ_EXPSTR (20*SZ_LINE)
define EX_UNDEFINED -999
define MAX_OBEXPR 250
define MAX_OPERANDS 50
define EX_FD Memi[$1] # output binary file descriptor
define EX_HEADER Memi[$1+1] # write an output header?
define EX_OUTTYPE Memi[$1+2] # outtype parameter value
define EX_INTERLEAVE Memi[$1+3] # interleave parameter value
define EX_BSWAP Memi[$1+4] # bswap parameter value
define EX_VERBOSE Memi[$1+5] # verbose parameter value
define EX_FORMAT Memi[$1+6] # format parameter code
define EX_BLTIN Memi[$1+7] # buitlin format code
define EX_COLOR Memi[$1+8] # does format support color?
define EX_OROWS Memi[$1+9] # no. rows in output image
define EX_OCOLS Memi[$1+10] # no. cols in output image
define EX_IMDIM Memi[$1+11] # input image list dimensionality
define EX_IMTYPE Memi[$1+12] # input image list type
define EX_NIMAGES Memi[$1+13] # number of images to convert
define EX_NCOLS Memi[$1+14] # number of columns in image
define EX_NLINES Memi[$1+15] # number of lines in image
define EX_NEXPR Memi[$1+16] # number of outbands expressions
define EX_NIMOPS Memi[$1+17] # image operand array (ptr)
define EX_IMOPS Memi[$1+18] # image operand array (ptr)
define EX_OUTFLAGS Memi[$1+20] # output format flags
define EX_BFNPTR Memi[$1+21] # binary file name (ptr)
define EX_HDRPTR Memi[$1+22] # user-defined head file (ptr)
define EX_OTPTR Memi[$1+23] # output type string (ptr)
define EX_OBPTR Memi[$1+24] # outbands expression string (ptr)
define EX_CMPTR Memi[$1+25] # colormap filename (ptr)
define EX_LUTPTR Memi[$1+26] # LUT filename (ptr)
define EX_TIMPTR Memi[$1+27] # temp image name (ptr)
define EX_PSDPI Memr[P2R($1+28)] # EPS dpi resolution
define EX_PSSCALE Memr[P2R($1+29)] # EPS scale
define EX_BRIGHTNESS Memr[P2R($1+30)] # display brightness value
define EX_CONTRAST Memr[P2R($1+31)] # display contrast value
define EX_CMAP Memi[$1+32] # colormap struct (ptr)
define EX_NCOLORS Memi[$1+33] # no. of colors in colormap
define EX_LUT Memi[$1+34] # LUT struct (ptr)
define EX_NLUTEL Memi[$1+35] # no. of indices in lut
define EX_OBANDS Memi[$1+36] # outbands array (ptr)
# Handy macros.
define HDRFILE Memc[EX_HDRPTR($1)]
define LUTFILE Memc[EX_LUTPTR($1)]
define CMAPFILE Memc[EX_CMPTR($1)]
define BFNAME Memc[EX_BFNPTR($1)]
define TIMNAME Memc[EX_TIMPTR($1)]
define OBANDS Memi[EX_OBANDS($1)+$2-1]
define IMOP Memi[EX_IMOPS($1)+$2-1]
# Define the outbands struct.
define LEN_OUTBANDS 5
define OB_EXPSTR Memi[$1] # expression string (ptr)
define OB_WIDTH Memi[$1+1] # expression width
define OB_HEIGHT Memi[$1+2] # expression height
define O_EXPR Memc[OB_EXPSTR(OBANDS($1,$2))]
define O_WIDTH OB_WIDTH(OBANDS($1,$2))
define O_HEIGHT OB_HEIGHT(OBANDS($1,$2))
# Operand structure.
define LEN_OPERAND 10
define IO_IMPTR Memi[$1] # image descriptor
define IO_BAND Memi[$1+1] # image band
define IO_LINE Memi[$1+2] # image line
define IO_TAG Memi[$1+3] # operand tag name
define IO_TYPE Memi[$1+4] # operand type
define IO_NBYTES Memi[$1+5] # number of bytes
define IO_NPIX Memi[$1+6] # number of pixels
define IO_DATA Memi[$1+7] # pixel ptr
define IO_ISIM Memi[$1+8] # is data an image ptr?
define OP_TAG Memc[IO_TAG($1)]
#-----------------------------------------------------------------------------
# Useful Macro Definitions.
define bitset (and($1,$2)==($2))
# Format flags.
define FMT_RAW 1 # write a generic binary raster
define FMT_LIST 2 # list pixels values to the screen
define FMT_BUILTIN 3 # write a builtin format
# OUTPUT FLAGS:
# Byte swapping flags.
define S_NONE 0000B # swap nothing
define S_ALL 0001B # swap everything
define S_I2 0002B # swap short ints
define S_I4 0004B # swap long ints
define SWAP_STR "|no|none|yes|i2|i4|"
# Pixel storage flags.
define PIXEL_STORAGE 0001B # { {RGB} {RGB} ... {RGB} ... }
define LINE_STORAGE 0002B # { {RRRR} {GGG} {BBB} .... {RRR} ... }
define BAND_STORAGE 0004B # { {RR..RRR} {GG...GGG} {BB..BBB} }
# Output flags.
define OF_CMAP 00010B # a colormap was defined
define OF_MKCMAP 00020B # compute a colormap
define OF_BAND 00040B # force band storage
define OF_LINE 00100B # force line storage
define OF_FLIPX 00200B # flip image in X
define OF_FLIPY 00400B # flip image in Y
define OF_IEEE 01000B # write IEEE floating point
# Header flags.
define HDR_NONE 1 # no output header
define HDR_SHORT 2 # write a short header
define HDR_LONG 3 # write a verbose header
define HDR_USER 4 # user defined a file
# Pixtype pixel types.
define PT_BYTE 1 # byte data (no conversion)
define PT_UINT 2 # unsigned integer
define PT_INT 3 # signed integer
define PT_IEEE 4 # ieee floating point
define PT_NATIVE 5 # native floating point
define PT_SKIP 6 # skip
# EPS output params.
define EPS_DPI 72 # dpi resolution
define EPS_SCALE 1.0 # output scale
# Define colormap/grayscale macros and parameters.
define CMAP_SIZE 256 # Output colormap length
define CMAP_MAX 255 # Maximum map value
define CMAP Memc[$1+($2*CMAP_SIZE)+$3-1]
define R_COEFF 0.299 # NTSC grayscale coefficients
define G_COEFF 0.587
define B_COEFF 0.114
define EX_RED 0 # color flags
define EX_GREEN 1
define EX_BLUE 2
define SAMPLE_SIZE 10000 # default zscale() sample size
define CONTRAST 0.25 # default zscale() contrast
define SAMP_LEN 40 # default zscale() sample length
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