How to create Button Icon from PNG?

[NoSmoking@adobeforums.com]

I don't know whether if Acrobat / Reader support using PNG as button icon.

If it can how to create the icon form PNG?

Thanks.

[Leonard_Rosenthol@adobeforums.com]

If you look in the PDF Reference/ISO 32000-1, you will see that button icons are Form XObjects, which could include reference to an Image XObject, which could be derived from a PNG image.

[NoSmoking@adobeforums.com]

Leonard:
My button means my TOOL button, not FORM button.

I means that create an icon for my plugin's tool button.

[NoSmoking@adobeforums.com]

Leonard:
I convert the PNG to a pdf file and I use CosDocOpenWithParams to open the PDF file then using CosStreamOpenStm to get the image XObject.
Next i set this XObject to my icon and load it.
Is this way OK?

thanks.

[Leonard_Rosenthol@adobeforums.com]

Sorry - misunderstood.

For TOOL button, there is a sample in the Acrobat 9 SDK that shows how to use a PNG for your toolbar button.

[NoSmoking@adobeforums.com]

Thanks,Leonard
I have just see the sample in the Acrobat 9 SDK.
The sample use png tool button for MAC,not Windows.
But i tried it under Windows XP & Acrobat 8,it's OK.

The code show below:

AVIconBundle6 createPNGIcon(const std::string& strName)
{
//strName is the png file path
if(strName.empty())return NULL;

AVIconDataRec iconData;
iconData.dataStm = NULL;
iconData.eColorFormat = kAVIconColor;

ASFile asf = NULL;
ASPathName aspn = ASFileSysCreatePathFromCString(NULL, strName.c_str());
if(!aspn)return NULL;

if(ASFileSysOpenFile(NULL, aspn, ASFILE_READ, &asf) != 0)
return NULL;

ASUns32 dataSize = ASFileGetEOF(asf);
if(dataSize <= 0)return NULL;

ASUns8 *data = (ASUns8 *)ASmalloc(dataSize + 1);
ASFileRead(asf, (char *)data, dataSize);
ASFileClose(asf);

iconData.dataStm = ASMemStmRdOpen((char *)data, dataSize);
if(!iconData.dataStm){
ASfree(data);
return NULL;
}

return AVAppCreateIconBundle6 (kAVIconPNG, &iconData, 1);
}

AVToolButton toolButton = AVToolButtonNew ("mytoolname", createPNGIcon("test.png"), false, false);