Alpha transparency...

sitajony

Active Member
Licensed User
Hello, I serched for get the code source for draw an image with the transparency and it works, I can now merge it in my executable but it doesn't work on every mobile... On HTC HD2 it's not working but on my old LG KS20 it's great...
As I can't test several time (the HTC HD2 is not the mine) I can't know exactly where is the problem but I suspect it's here:

B4X:
        [ComImport, Guid("327ABDA9-072B-11D3-9D7B-0000F81EF32E"), InterfaceType(ComInterfaceType.InterfaceIsIUnknown)]
        [ComVisible(true)]
        public interface IImage
        {
            uint GetPhysicalDimension(out Size size);
            uint GetImageInfo(out ImageInfo info);
            uint SetImageFlags(uint flags);
            uint Draw(IntPtr hdc, ref Rectangle dstRect, IntPtr NULL);
            uint PushIntoSink();
            uint GetThumbnail(uint thumbWidth, uint thumbHeight, out IImage thumbImage);
        }
The come import guid is maybe not the same on every mobile...
Anyone can tell me if there's an other way? I can also upload my source code if it's needed...

I know that there's a library made by eww245 (Alpha.dll) but I want merge it directly on my executable)

Thanks for your replies!
 
Last edited:

sitajony

Active Member
Licensed User
I succesful did my own lib for the transparency for merge it directly in my executable but strangly when I run my program it return on some devices (not all) "Invalid Cast" but the strangest it's that it return this error not when I run the function for draw the alpha image but when I show my form...
It's really weird...
I upload my code source for Alpha transparency and the EXE who works on some device (KS20 and Touch HD sure and HD2+Touch pro no)

The EXE just need the "img.png" image, no library required, it's directly merged...

Anyone can help me?
Thanks for your replie!
 

sitajony

Active Member
Licensed User
I found, in fact it need CF3.5, when it's older it return InvalidCast...
Now I can set the transparency and merge it directly on my EXE
I'll do a official library for this and say how merge it cause normaly you can't...
 
Cookies are required to use this site. You must accept them to continue using the site. Learn more…