Native Development

[marcel808]

sorry! another newbie question.

Using standard C in my playbook app I can see files in "shared/images" and I can see cover.png is there but if I use that path in Qt, to open the image, I get a fail returned, image not loaded.

What am I doing wrong

thanks

QImage myImage;
bool val = myImage.load("shared/videos/cover.png");
// bool always false

[smcveigh]

your app has access_shared permissions in it's bar-descriptor, right?

have you tried checking what the returned error is?

qDebug() << myImage.error();
qDebug() << myImage.errorString();

 Also, have you tried an absolute path, like "file:///accounts/1000/shared/videos/cover.png"?  It's possible "file:" is required as part of a Qt pathname URI.

[jtegen]

Dangerous to hard code a path like that. Is there not something to obtain the native path of the shared/documents directory like there is in AS3?

[marcel808]

baby steps...I'm stubbling along, all the problems seem to be in the Qt port for Playbook

If I try:

QImage myImage;
bool val = myImage.load("shared/videos/cover.png");

 then that fails always, if I check the error message it varies from unknown error and unsupported format.

But this works fine:

QFile PixmapFile("shared/videos/cover.png");
QByteArray bArray;
QPixmap Pixmap;
bArray = PixmapFile.readAll().toBase64();
Pixmap.loadFromData(bArray.fromBase64(bArray));

 Looks like some methods work ok, others not.

My next challenge is to try and load jpeg files. If I change the file to a jpg, bArray is filled but loadFromData fails (I can't see a way to get an error message from it, just boolean false).

Qt must support jpegs so it muct be the Qt for Playbook so libraries I downloaded, they must be missing jpeg support I think.

thanks

cel

[marcel808]

Got it working finally!

I opened bar-descriptor.xml, Assets tab and added (wherever_your_qt_is)/qt4/plugins/imageformats/libqjpeg.so

I then clicked the Source tab and changed:

type="Qnx/Elf">lib/libqjpeg.so</asset>

to

type="Qnx/Elf">lib/imageformats/libqjpeg.so</asset> 

Rebuilt and all works fine now