Adds support for base64 encoded image decoding when the path
is a HTML data URL (in addition to the existing "base64:..."
format support)
Allows use of eg "data:image/jpeg;base64,XXXXXXXX" formats
for image paths, so that the image cache can correctly handle
embedded image paths from HTML/CSS content
qgswkbptr.h is included indirectly by a large number of source files.
So this commit does the following:
- remove #include "qgsapplication.h" from qgswkbptr.h, and copy-paste the swap_endian
function where it's used.
- add the missing #include "qgsapplication.h" in other files
The rationale for this change is:
- qgswkbptr.h doesn't really needs QgsApplication, since it only used swap_endian.
We don't need to add a fake dependency on QgsApplication on every (indirect) "includers"
of qgswkbptr.h
- qgsapplication.h depends on qgsconfig.h which itself changes quite often (on every git op
at least). Before this change, a 'git commit' would trigger a rebuild of about 3500 files.
With this change we're down to ~700.
This new class QgsImageCache is the equivalent of QgsSvgCache
but for raster images.
QgsImageCache stores pre-rendered resampled versions of raster
image files, allowing efficient reuse without incurring the
cost of resampling on every render.
Additionally, it offers the other benefits QgsSvgCache has,
such as thread safety, ability to transparently download remote
images, and support for base64 encoded strings.
