[ Show ]
Support VoyForums
[ Shrink ]
VoyForums Announcement: Programming and providing support for this service has been a labor of love since 1997. We are one of the few services online who values our users' privacy, and have never sold your information. We have even fought hard to defend your privacy in legal cases; however, we've done it with almost no financial support -- paying out of pocket to continue providing the service. Due to the issues imposed on us by advertisers, we also stopped hosting most ads on the forums many years ago. We hope you appreciate our efforts.

Show your support by donating any amount. (Note: We are still technically a for-profit company, so your contribution is not tax-deductible.) PayPal Acct: Feedback:

Donate to VoyForums (PayPal):

Login ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 12345678[9]10 ]

[ Next Thread | Previous Thread | Next Message | Previous Message ]

Date Posted: 07:18:27 07/24/00 Mon
Author: Michel
Subject: Re: Problem saving PNG with transparent color (1.05beta)
In reply to: Stefan Cedervall 's message, "Problem saving PNG with transparent color (1.05beta)" on 11:05:27 07/19/00 Wed

Dear Stefan,

I apologies for the delay. I have been on vacation and was planning to continue working on

Envision, but I took the time off instead.

This seems to be ok. What type of image format (palette, true color...) are you using? Also

did you double check the that transparent color that you set is contained in your graphic?

You may also set explicitely the BackgroundColor when loading the image to double check.

Best regards,


> My PNG:s does not seem to be transparent.
> What I do is:
> png := TPngGraphic.Create;
> png.Assign(Picture.Graphic);
> png.SaveProgressive := True;
> png.SaveTransparent := True;
> png.TransparentColor :=
> ColorToTRGB(TransparentColor);
> png.SaveToFile(TargetLink);
> The file is saved OK, but without transparent
> color. I find no docs on 1.05beta, including
> the SaveTransparent, so I migt do somthing realy
> silly ;-). Think a have checked the obvius thou,
> like traying with png.SaveProgressive := False;
> ColorToTRGB is writen in a way so the switch of
> order shuld not matter:
> function ColorToTRGB(Color: TColor): EnDiGrph.TRgb;
> var
> rgbValue: Longint; // RGB;
> begin
> rgbValue := ColorToRGB(Color); // Graphics.pas
> Result.Red := GetRValue(rgbValue); // Windows.pas
> Result.Green := GetGValue(rgbValue); // Windows.pas
> Result.Blue := GetBValue(rgbValue); // Windows.pas
> end;
> And TransparentColor is the right color, for if I use
> it to save to gif, it works!
> TIA /S

[ Next Thread | Previous Thread | Next Message | Previous Message ]

[ Contact Forum Admin ]

Forum timezone: GMT-5
VF Version: 3.00b, ConfDB:
Before posting please read our privacy policy.
VoyForums(tm) is a Free Service from Voyager Info-Systems.
Copyright © 1998-2019 Voyager Info-Systems. All Rights Reserved.