[Qt-interest] QtWebKit 4.5.0 doesn't load SVG or TIFF images

[Rush Manbert]

On Mar 19, 2009, at 2:52 PM, Rush Manbert wrote:

> [---- This first part duplicates an earlier post - same app, but
> different problem ----]
> My test platform is Mac OSX 10.5.6 with Xcode 3.1.2.
>
> I have a small web browser application that is a prototype for a much
> more complicated web browser application. The simple version always
> loads the same HTML. The web page that the HTML defines loads an
> external CSS file, an external JavaScript file, and a number of
> images, each in one of the supported image formats. The JavaScript
> causes the images to move on the page, the CSS causes the div that
> contains the images to have a purple background, and each image
> includes text that identifies its format. This all makes it easy to
> tell whether all of the content was loaded.
>
> Because of the way the complicated browser works, we implemented this
> by deriving from QNetworkAccessManager and overriding its
> createRequest() method. We also derived from QNetworkReply so that we
> could override its readData() and bytesAvailable() methods, among
> others.
>
> The createRequest() override instantiates our NetworkReply class and
> gives it a pointer to the rendered HTML. The NetworkReply::readData()
> method returns the HTML string in however many chunks are required.
> The current implementation is a fairly short string, so it only gets
> called once and it just returns the whole thing.
>
> I have been using qmake to read my .pro file and make Xcode projects.
> I have tested this using Qt 4.4.3 and 4.5.0. Both of my Qt
> installations use the -static configuration, so I am using static
> libraries.
>
> [---- Here is the new stuff. ----]
> The problem I am seeing is that neither the Qt 4.4.3 version, nor the
> Qt 4.5.0 version loads the SVG or TIFF images. Both versions load BMP,
> GIF, JPG, and ICO images.
>
> I have used my fixed HTML to write a web page that I can load with
> Safari. It loads all 6 image types and the page acts as I expect. I
> can also drag and drop all six image files onto Safari and they are
> displayed correctly.
>
> In my program source, I have this:
> Q_IMPORT_PLUGIN (qgif)
> Q_IMPORT_PLUGIN (qico)
> Q_IMPORT_PLUGIN (qjpeg)
> Q_IMPORT_PLUGIN (qmng)
> Q_IMPORT_PLUGIN (qsvg)
> Q_IMPORT_PLUGIN (qtiff)
>
> and my .pro file looks like this:
> CONFIG += qt debug
> HEADERS += TestBrowser.h
> SOURCES += TestBrowser.cpp
>
> QT += core network webkit svg
> LIBS += /Users/rmanbert/temp/qt/plugins/imageformats/libqgif_debug.a /
> Users/rmanbert/temp/qt/plugins/imageformats/libqic
> o_debug.a /Users/rmanbert/temp/qt/plugins/imageformats/
> libqjpeg_debug.a /Users/rmanbert/temp/qt/plugins/imageformats/lib
> qmng_debug.a /Users/rmanbert/temp/qt/plugins/imageformats/
> libqsvg_debug.a /Users/rmanbert/temp/qt/plugins/imageformats/l
> ibqtiff_debug.a
>
> You can see that it includes "svg" on the "QT +=" line, and also has
> the full path to libqsvg_debug.a in the "LIBS +=" line.
>
> Does anyone have any ideas why these image types would not load?
>
> Thanks,
> Rush

I have now tested against 4.5.0 dylibs and that version DOES load all  
of the image types.

Does anyone know how to enable this for static Qt?

I might also add here that the static libs won't load flash content,  
but the dylibs do. I can't find an obvious Qt plugin for flash. Is  
there some way to get the static libraries to load flash content?

- Rush