GETIMAGE, GETIMAGE_W

Graphics Subroutine: Stores the screen image defined by a specified bounding rectangle.

Module: USE DFLIB

Syntax

CALL GETIMAGE (x1, y1, x2, y2, image)
CALL GETIMAGE_W (wx1, wy1, wx2, wy2, image)

x1, y1
(Input) INTEGER(2). Viewport coordinates for upper-left corner of bounding rectangle.

x2, y2
(Input) INTEGER(2). Viewport coordinates for lower-right corner of bounding rectangle.

wx1, wy1
(Input) REAL(8). Window coordinates for upper-left corner of bounding rectangle.

wx2, wy2
(Input) REAL(8). Window coordinates for lower-right corner of bounding rectangle.

image
(Output) INTEGER(1). Array of single-byte integers. Stored image buffer.

GETIMAGE defines the bounding rectangle in viewport-coordinate points (x1, y1) and (x2, y2). GETIMAGE_W defines the bounding rectangle in window-coordinate points (wx1, wy1) and (wx2, wy2).

The buffer used to store the image must be large enough to hold it. You can determine the image size by calling IMAGESIZE at run time, or by using the formula described under IMAGESIZE. After you have determined the image size, you can dimension the buffer accordingly.

Compatibility

STANDARD GRAPHICS QUICKWIN GRAPHICS LIB

See Also: IMAGESIZE, PUTIMAGE

Example

!  Build as QuickWin or Standard Graphics
USE DFLIB
INTEGER(1), ALLOCATABLE:: buffer (:)
INTEGER(2) status, x, y, error
INTEGER(4) imsize
x = 50
y = 30
status = ELLIPSE ($GFILLINTERIOR, INT2(x-15), &
                  INT2(y-15), INT2( x+15), INT2(y+15))
imsize = IMAGESIZE (INT2(x-16), INT2(y-16), &
                  INT2( x+16), INT2(y+16))
ALLOCATE(buffer (imsize), STAT = error)
IF (error .NE. 0) THEN
  STOP 'ERROR: Insufficient memory'
END IF
CALL GETIMAGE (INT2(x-16), INT2(y-16), &
                  INT2( x+16), INT2(y+16), buffer)
END