jpg quality

[NeX]

Hi there,

When i display a JPG from the SD card, it seems to be at a higher quality than a JPG that has been converted as an asset. is there any way to force assets to use the same bit depth as a JPG read from the SD card?

thanks

[jamesbowman]

Yes, gdasset encodes images as ARGB4 format by default:

$ gd2asset --help
usage: gd2asset <options> <assets>

 -o   output header file
 -f   output asset file (default is header file)

If no output header file is given, then "default_assets.h" is used

Each asset is a filename, optionally followed by some var=val
assignments. For example:
 pic1.png                 image, format ARGB4
 pic2.jpg,format=L8       image, format L8
 serif.ttf,size=16        font, 16 pixels high

The assets are compiled into flash, or if the "-f" option is given
into a file. In this case the file should be copied to the
microSD card.
In either case, calling LOAD_ASSETS() from the program loads all
assets.
So to encode with format RGB565 (which is what the FT800 JPEG loader uses), do:

gd2asset ... pic2.jpg,format=RGB565


[NeX]

Thanks very much for the help, this has actually helped me save space as well as get the Jpg quality i was after! thanks loads