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Transparent PNG Images
Posted: Wed Nov 05, 2014 2:45 pm
by calimero22
Hi All, how are you?
Excuse me if this question is repeated (but I have not found it).
If I put a PNG image with TRASPARENT property, it works fine.
But if I put another image back the principal image, I see the gray box.
What is the solution to eliminate the gray box of background?
Thank you
Giovanni Di Maria
Code: Select all
This is my code:
#include "hmg.ch"
FUNCTION Main()
DEFINE WINDOW Form_1 ;
AT 90,90 ;
WIDTH 800 ;
HEIGHT 600 ;
TITLE "Giovanni" ;
MAIN
END WINDOW
@ 0,0 IMAGE foto0 ;
PARENT Form_1 ;
PICTURE "background.png" ;
WIDTH 800 ;
HEIGHT 600 ;
STRETCH
@ 20,20 IMAGE foto ;
PARENT Form_1 ;
PICTURE "dog.jpg" ;
WIDTH 400 ;
HEIGHT 300 ;
STRETCH
@ 120,150 IMAGE foto2 ;
PARENT Form_1 ;
PICTURE "cocacola.png" ;
WIDTH 100 ;
HEIGHT 150 ;
STRETCH ;
TRANSPARENT
ACTIVATE WINDOW Form_1
RETURN NIL
Re: Transparent PNG Images
Posted: Wed Nov 05, 2014 2:59 pm
by Javier Tovar
Tienes que usar un editor de imágenes, como Photo Shop y darle transparencia a tus imágenes en la parte blanca, checa los vídeos tutoriales en YouTube!
Saludos
Re: Transparent PNG Images
Posted: Wed Nov 05, 2014 4:03 pm
by srvet_claudio
Please upload the images CocaCola.png and BackGround.png
Re: Transparent PNG Images
Posted: Wed Nov 05, 2014 5:26 pm
by calimero22
Hi.
I have used a graphic program (photofilter) and set the alpha channel.
This program, with QT library works fine.
I send you the image files.
Thank you,
Giovanni Di Maria
Re: Transparent PNG Images
Posted: Wed Nov 05, 2014 5:30 pm
by calimero22
PS.
I don't see my topic........
Giovanni
Re: Transparent PNG Images
Posted: Wed Nov 05, 2014 6:33 pm
by EduardoLuis
Hi Calimero:
Try with this cocacola image.-
If it works and looks transparent, for better results, upload the same image in .bmp format, so i could process it better.-
- cocacola.png (23.93 KiB) Viewed 4044 times
Re: Transparent PNG Images
Posted: Wed Nov 05, 2014 6:51 pm
by calimero22
Here's "cocacola.bmp".
But bmp does not support trasparency.
Ciao
Giovanni
PS
I cannot send BMP. The system gives the messages "Invalid file extension".
Re: Transparent PNG Images
Posted: Wed Nov 05, 2014 7:47 pm
by EduardoLuis
Hi Calimero:
Make a Zip file with cocacola.bmp, and upload.-
By the way, BMP files admits transparency, but with the appropiate software.-
Photoshop lets you modify transparency of any image file.-
I use lots of images on my developes; all of them are .jpg, instead of png, becase .jpg provides better resolution, nearly .bmp.
Anyway all images (.PNG, .JPG. BMP) i process them with photoshop for best results with transparency.-
With regards.
Eduardo
Re: Transparent PNG Images
Posted: Wed Nov 05, 2014 8:25 pm
by calimero22
Ok. Here is the zipped file of BMP.
Thank you.
Giovanni
Re: Transparent PNG Images
Posted: Wed Nov 05, 2014 9:04 pm
by EduardoLuis
Hi calimero22:
I attach a zip file containing 3 images: 1 new bmp, 1 jpg, 1 png, all with transparency.-
Try them. Hope this will work for you.
Eduardo