0001817: Access violation when using SetBitmapPixelFormat

ID	Project	Category	View Status	Date Submitted	Last Update

0001817	JEDI VCL	00 JVCL Components	public	2004-05-31 03:00	2004-06-04 01:08

Reporter	wdonker	Assigned To	user72
Priority	normal	Severity	major	Reproducibility	always
Status	resolved	Resolution	fixed
Product Version
Target Version		Fixed in Version

Summary	0001817: Access violation when using SetBitmapPixelFormat
Description	When changing BitMapPixelFormat from 24bit to 8bit an access violation occurs in function BitmapToMemoryStream. This is because variable ImageSize is not adjusted to the new, smaller size of the Bitmap.
Additional Information	This bug was also present in RxLib. Possible fix is in the attached version of JvGraph.
Tags	No tags attached.

2004-05-31 03:00	JvGraph.pas (46,349 bytes)

~~user72~~ 2004-05-31 23:57 ~0004417	FYI, this function is now in JvJVCLUtils (JVCL3)

~~user72~~ 2004-06-01 00:03 ~0004418	There is already a similar fix in the JvJVCLUtils version that I think accomplishes the same thing: ... // at the end: Result := TMemoryStream.Create; try Result.Write(P^, Length); if SourceBitmapFormat = pfDevice then Result.Write(Bits^, ImageSize) else Result.Write(Bits^, ImageSize div 3); Result.Position := 0; except Result.Free; raise; end;

wdonker 2004-06-03 09:14 reporter ~0004453	Ok, that's the one. Consider the bug fixed.

Date Modified	Username	Field	Change
2004-05-31 03:00	wdonker	New Issue
2004-05-31 03:00	wdonker	File Added: JvGraph.pas
2004-05-31 23:57	~~user72~~	Note Added: 0004417
2004-06-01 00:03	~~user72~~	Note Added: 0004418
2004-06-03 01:15	~~user72~~	Status	new => feedback
2004-06-03 09:14	wdonker	Note Added: 0004453
2004-06-04 01:08	~~user72~~	Status	feedback => resolved
2004-06-04 01:08	~~user72~~	Resolution	open => fixed
2004-06-04 01:08	~~user72~~	Assigned To	=> user72
2005-09-27 14:37	remkobonte	Relationship added	related to 0003237