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+---- Thread: What am I doing wrong with _FreeImage? (/showthread.php?tid=1497)
What am I doing wrong with _FreeImage? - PhilOfPerth - 02-24-2023
I have written a small test using _loadimage and _FreeImage, and all goes well except when I try to clear the images (as I believe is necessary after using them).
I get an Illegal function call message at that point. Why is it so???
Code: (Select All)
Screen _NewImage(1500, 800, 32)
GetGridSize:
Locate 15, 66
Print "Choose a grid size, 1 to 4 (for 12, 20, 30 or 42 tiles)"
Play move$
Getsize:
_KeyClear: k = 0
While k < 1
_Limit 30
k = _KeyHit
Wend
Select Case k
Case Is = 49
numtiles = 12 ' numtiles is number of tiles for that size grid
numcols = 3 ' numcols is number of columns in the grid
Case Is = 50
numtiles = 20
numcols = 5
Case Is = 51
numtiles = 30
numcols = 5
Case Is = 52
numtiles = 42
numcols = 7
Case Else
GoTo Getsize
End Select
DisplayTiles: '
numrows = numtiles / numcols ' set number of rows needed for the numtiles and numcols
Dim tiles(numtiles) As Long
For a = 1 To numtiles
tiles(a) = _LoadImage("RecPics/test.jpg", 32) ' set tiles array with numpics copies of test.jpg
Next
For a = 1 To numtiles / 2
_PutImage (60 * a, 60), tiles(a) ' display first half of tiles array
Next
For a = numtiles / 2 + 1 To numtiles
_PutImage (60 * (a - numtiles / 2), 120), tiles(a) ' display second half of tiles array
Next
Sleep 2
For a = 1 To numtiles
_FreeImage (a) ' free all of the images from memory
Next
Print "I get an error message here: Illegal function call line 45 (the _FreeImage line)"
SleepRE: What am I doing wrong with _FreeImage? - bplus - 02-24-2023
Code: (Select All)
_FreeImage (a) ' free all of the images from memoryWhy is the "a" inside ()'s ?
_FreeImage is a Sub / Statement not a Function
If it's not that, DIM a as Long.
Oh! Should be:
_FreeImage tiles(a) ' <<< missing tiles
RE: What am I doing wrong with _FreeImage? - a740g - 02-24-2023
You should check if all _LoadImage calls are succeeding.
I am quite certain that _FreeImage is throwing an "illegal function call" because it is trying to free an invalid image handle.
Update:
Quote:Oh! Should be:
_FreeImage tiles(a) ' <<< missing tiles
^this.
RE: What am I doing wrong with _FreeImage? - PhilOfPerth - 02-24-2023
(02-24-2023, 01:13 AM)bplus Wrote:Code: (Select All)_FreeImage (a) ' free all of the images from memory
Why is the "a" inside ()'s ?
_FreeImage is a Sub / Statement not a Function
If it's not that, DIM a as Long.
Oh! Should be:
_FreeImage tiles(a) ' <<< missing tiles
The "(a)" is the loop variable. It loads the same image into each of the tiles() positions - there's only one image, called test.jpg ( which I attached - I hope!) Edit: I mis-named the image, by including its path. it should just be "test.jpg".
RE: What am I doing wrong with _FreeImage? - PhilOfPerth - 02-24-2023
(02-24-2023, 06:00 AM)PhilOfPerth Wrote:(02-24-2023, 01:13 AM)bplus Wrote:Code: (Select All)_FreeImage (a) ' free all of the images from memory
Why is the "a" inside ()'s ?
_FreeImage is a Sub / Statement not a Function
If it's not that, DIM a as Long.
Oh! Should be:
_FreeImage tiles(a) ' <<< missing tiles
The "(a)" is the loop variable. It loads the same image into each of the tiles() positions - there's only one image, called test.jpg ( which I attached - I hope!) Edit: I mis-named the image, by including its path. it should just be "test.jpg".
You got it b+! I didn't get what you meant by "missing tiles" - I thought you meant there were tiles missing ( apart from mine
), but then it dawned on me. You were both correct, of course - it was trying to free a mis-named image. Thanks both for your help.