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Manual Reference Pages  - prefsize (3)

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NAME

prefsize(3f) - [M_pixel] specify size of pixel array (LICENSE:PD)

CONTENTS

Synopsis
Description
Options
Example
Author
License

SYNOPSIS

definition:

   subroutine prefsize(width, height)
   integer width, height

DESCRIPTION

Specify the preferred width and height of the pixel array opened by the *next* vinit(3f). The pixel array is then available via the M_pixel(3fm) module as variable P_pixel. Note that the width corresponds to the number of rows in the array, and height to the number of columns.

OPTIONS

WIDTH	width of pixel array to create when vinit(3f) is called
HEIGHT	height of pixel array to create when vinit(3f) is called

EXAMPLE

Sample program:

     program demo_prefsize
     use M_pixel, only: prefsize, vinit, ortho2, clear
     use M_pixel, only: move2, draw2, vexit, color
     use M_pixel, only : P_pixel,P_colormap
     use M_writegif, only : writegif
     implicit none
        ! make first file with one size
        call prefsize(60*2,40*2)
        call vinit()
        call picture()
        call writegif(’prefsize.3m_pixel.gif’,P_pixel,P_colormap)
        call vexit()

        ! make second file with another size
        call prefsize(60*3,40*3)
        call vinit()
        call picture()
        call writegif(’prefsize_B.3m_pixel.gif’,P_pixel,P_colormap)
        call vexit()
     contains
     subroutine picture
        call ortho2(-300.0,300.0,-200.0,200.0)
        call clear(0)
        call color(1)
        call move2(-300.0,-200.0)
        call draw2(300.0,200.0)
        call move2(300.0,-200.0)
        call draw2(-300.0,200.0)
     end subroutine picture
     end program demo_prefsize

AUTHOR

John S. Urban

LICENSE

Public Domain

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prefsize (3)

March 11, 2021

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