Graphics Function: Returns the status of the most recently used graphics routine.
Module: USE IFQWIN
Syntax
result = GRSTATUS( )
Results
The result type is INTEGER(2). The result is the status of the most recently used graphics function.
Use GRSTATUS immediately following a call to a graphics routine to determine if errors or warnings were generated. Return values less than 0 are errors, and values greater than 0 are warnings.
The following symbolic constants are defined in the IFQWIN.F90 module file for use with GRSTATUS:
| Constant | Meaning |
|---|---|
| $GRFILEWRITEERROR | Error writing bitmap file |
| $GRFILEOPENERROR | Error opening bitmap file |
| $GRIMAGEREADERROR | Error reading image |
| $GRBITMAPDISPLAYERROR | Error displaying bitmap |
| $GRBITMAPTOOLARGE | Bitmap too large |
| $GRIMPROPERBITMAPFORMAT | Improper format for bitmap file |
| $GRFILEREADERROR | Error reading file |
| $GRNOBITMAPFILE | No bitmap file |
| $GRINVALIDIMAGEBUFFER | Image buffer data inconsistent |
| $GRINSUFFICIENTMEMORY | Not enough memory to allocate buffer or to complete a fill operation |
| $GRINVALIDPARAMETER | One or more parameters invalid |
| $GRMODENOTSUPPORTED | Requested video mode not supported |
| $GRERROR | Graphics error |
| $GROK | Success |
| $GRNOOUTPUT | No action taken |
| $GRCLIPPED | Output was clipped to viewport |
| $GRPARAMETERALTERED | One or more input parameters was altered to be within range, or pairs of parameters were interchanged to be in the proper order |
After a graphics call, compare the return value of GRSTATUS to $GROK. to determine if an error has occurred. For example:
IF ( GRSTATUS .LT. $GROK ) THEN
! Code to handle graphics error goes here
ENDIF
The following routines cannot give errors, and they all set GRSTATUS to $GROK:
| DISPLAYCURSOR | GETCOLORRGB | GETTEXTWINDOW |
| GETBKCOLOR | GETTEXTCOLOR | OUTTEXT |
| GETBKCOLORRGB | GETTEXTCOLORRGB | WRAPON |
| GETCOLOR | GETTEXTPOSITION |
The following table lists some other routines with the error or warning messages they produce for GRSTATUS:
| Function | Possible GRSTATUS error codes | Possible GRSTATUS warning codes |
|---|---|---|
| ARC, ARC_W | $GRINVALIDPARAMETER | $GRNOOUTPUT |
| CLEARSCREEN | $GRINVALIDPARAMETER | |
| ELLIPSE, ELLIPSE_W | $GRINVALIDPARAMETER, $GRINSUFFICIENTMEMORY |
$GRNOOUTPUT |
| FLOODFILLRGB | $GRINVALIDPARAMETER, $GRINSUFFICIENTMEMORY |
$GRNOOUTPUT |
| GETARCINFO | $GRERROR |
|
| GETFILLMASK | $GRERROR, $GRINVALIDPARAMETER |
|
| GETFONTINFO | $GRERROR | |
| GETGTEXTEXTENT | $GRERROR | |
| GETIMAGE | $GRINSUFFICIENTMEMORY | $GRPARAMETERALTERED |
| GETPIXEL | $GRBITMAPTOOLARGE | |
| GETPIXELRGB | $GRBITMAPTOOLARGE | |
| LINETO, LINETO_W | $GRNOOUTPUT, $GRCLIPPED |
|
| LOADIMAGE | $GRFILEOPENERROR, $GRNOBITMAPFILE, $GRALEREADERROR, $GRIMPROPERBITMAPFORMAT, $GRBITMAPTOOLARGE, $GRIMAGEREADERROR |
|
| OUTGTEXT | $GRNOOUTPUT, $GRCLIPPED |
|
| PIE, PIE_W | $GRINVALIDPARAMETER, $GRINSUFFICIENTMEMORY |
$GRNOOUTPUT |
| POLYGON, POLYGON_W | $GRINVALIDPARAMETER, $GRINSUFFICIENTMEMORY |
$GRNOOUTPUT, $GRCLIPPED |
| PUTIMAGE, PUTIMAGE_W | $GRERROR, $GRINVALIDPARAMETER, $GRINVALIDIMAGEBUFFER $GRBITMAPDISPLAYERROR |
$GRPARAMETERALTERED, $GRNOOUTPUT |
| RECTANGLE, RECTANGLE_W | $GRINVALIDPARAMETER, $GRINSUFFICIENTMEMORY |
$GRNOOUTPUT, $GRCLIPPED |
| REMAPPALETTERGB | $GRERROR, $GRINVALIDPARAMETER |
|
| REMAPALLPALETTERGB | $GRERROR, $GRINVALIDPARAMETER |
|
| SAVEIMAGE | $GRFILEOPENERROR | |
| SCROLLTEXTWINDOW | $GRNOOUTPUT | |
| SETBKCOLOR | $GRINVALIDPARAMETER | $GRPARAMETERALTERED |
| SETBKCOLORRGB | $GRINVALIDPARAMETER | $GRPARAMETERALTERED |
| SETCLIPRGN | $GRPARAMETERALTERED | |
| SETCOLOR | $GRPARAMETERALTERED | |
| SETCOLORRGB | $GRPARAMETERALTERED | |
| SETFONT | $GRERROR, $GRINSUFFICIENTMEMORY |
$GRPARAMETERALTERED |
| SETPIXEL, SETPIXEL_W | $GRNOOUTPUT | |
| SETPIXELRGB, SETPIXELRGB_W |
$GRNOOUTPUT | |
| SETTEXTCOLOR | $GRPARAMETERALTERED | |
| SETTEXTCOLORRGB | $GRPARAMETERALTERED | |
| SETTEXTPOSITION | $GRPARAMETERALTERED | |
| SETTEXTWINDOW | $GRPARAMETERALTERED | |
| SETVIEWPORT | $GRPARAMETERALTERED | |
| SETWINDOW | $GRINVALIDPARAMETER | $GRPARAMETERALTERED |
| SETWRITEMODE | $GRINVALIDPARAMETER |
Compatibility
STANDARD GRAPHICS QUICKWIN GRAPHICS LIB
See Also
ARC, ELLIPSE, FLOODFILLRGB, LINETO, PIE, POLYGON, REMAPALLPALETTERGB, SETBKCOLORRGB, SETCOLORRGB, SETPIXELRGB, SETTEXTCOLORRGB, SETWINDOW, SETWRITEMODE, Building Applications: Setting the Font and Displaying Text