0034479: Artifacts in TImageList when importing image with transparent background

ID	Project	Category	View Status	Date Submitted	Last Update

0034479	FPC	FCL	public	2018-10-29 21:28	2019-02-16 17:25

Reporter	M.AUDIO	Assigned To	Michael Van Canneyt
Priority	normal	Severity	minor	Reproducibility	always
Status	resolved	Resolution	fixed
Platform	x86_64	OS	Lubuntu lxde
Product Version	3.3.1

Summary	0034479: Artifacts in TImageList when importing image with transparent background
Description	In short, If I compile my LAZ r59378 with FPC r39747 importing an image with transparent areas in the the background is fine when lazarus resizes it to my specified resolutions. (attach 0000001) but If I compile my LAZ r59378 with FPC r39748 then importing an image with transparent areas in the the background produces artifacts when lazarus resizes it to my specified resolutions. (attach 0000002)
Steps To Reproduce	sample project + graphics (attach 0000003).
Additional Information	I'm not sure if the bugracker issue 0034266 is the problem, or it's something in the lazarus side that needs to be changed to support? that commit. so I don't know where is the best place for this report. Please feel free to move it to the right place.
Tags	alpha, artifact, image, ImageList, img, resize, transparent

Fixed in Revision
FPCOldBugId
FPCTarget

Attached Files

M.AUDIO 2018-10-29 21:28 reporter	imglistresize01.png (243,036 bytes) imglistresize01.png (243,036 bytes)

M.AUDIO 2018-10-29 21:29 reporter	imglistresize02.png (188,887 bytes) imglistresize02.png (188,887 bytes)

M.AUDIO 2018-10-29 21:30 reporter	imglistresizertransparentproblem.zip (68,083 bytes)

wp 2018-10-30 01:27 reporter ~0111668	Cannot reproduce on Win 10/64 bit with today's Laz trunk (r59392) and today's fpc trunk (r40091) (32 bit).

M.AUDIO 2018-10-30 09:25 reporter ~0111672	Freshly installed FPC r40095 and LAZ r59392, it still available on GTK2 linux. It started from FPC r39748 as mentioned.

Marco van de Voort 2018-10-30 11:55 manager ~0111679	Note there is also a transparency related fcl-image rev, r39973

M.AUDIO 2019-01-27 13:53 reporter ~0113662	Any news on this? Still available with fpc 41084 and laz 60230 I have to undo that patch (FPC r39748) every time I update laz+fpc. Is the author of that patch aware of this issue? I can't see s/he's email to inform him.

Ondrej Pokorny 2019-02-01 11:37 developer ~0113770	Thanks for reporting the bug. I'll work on it.

Ondrej Pokorny 2019-02-16 13:51 developer ~0114179	M.AUDIO, can you check with the new FPC trunk?

M.AUDIO 2019-02-16 15:31 reporter ~0114183	Ondrej, Tested with FPC r41342 and LAZ r60437 Thank you for fixing it.

Michael Van Canneyt 2019-02-16 17:25 administrator ~0114190	Thanks for the patch, Ondrej

Date Modified	Username	Field	Change
2018-10-29 21:28	M.AUDIO	New Issue
2018-10-29 21:28	M.AUDIO	File Added: imglistresize01.png
2018-10-29 21:29	M.AUDIO	File Added: imglistresize02.png
2018-10-29 21:30	M.AUDIO	File Added: imglistresizertransparentproblem.zip
2018-10-29 21:31	M.AUDIO	Tag Attached: image
2018-10-29 21:31	M.AUDIO	Tag Attached: ImageList
2018-10-29 21:31	M.AUDIO	Tag Attached: alpha
2018-10-29 21:31	M.AUDIO	Tag Attached: artifact
2018-10-29 21:31	M.AUDIO	Tag Attached: img
2018-10-29 21:31	M.AUDIO	Tag Attached: resize
2018-10-29 21:31	M.AUDIO	Tag Attached: transparent
2018-10-30 01:27	wp	Note Added: 0111668
2018-10-30 09:25	M.AUDIO	Note Added: 0111672
2018-10-30 11:55	Marco van de Voort	Note Added: 0111679
2018-10-31 09:44	Michael Van Canneyt	Relationship added	related to 0034266
2019-01-27 13:53	M.AUDIO	Note Added: 0113662
2019-02-01 11:37	Ondrej Pokorny	Note Added: 0113770
2019-02-16 13:51	Ondrej Pokorny	Note Added: 0114179
2019-02-16 15:22	Michael Van Canneyt	Assigned To	=> Michael Van Canneyt
2019-02-16 15:22	Michael Van Canneyt	Status	new => assigned
2019-02-16 15:31	M.AUDIO	Note Added: 0114183
2019-02-16 17:25	Michael Van Canneyt	Note Added: 0114190
2019-02-16 17:25	Michael Van Canneyt	Status	assigned => resolved
2019-02-16 17:25	Michael Van Canneyt	Resolution	open => fixed