From 356a190bcdae3a35165d494cfd76f494ccf5d7f5 Mon Sep 17 00:00:00 2001 From: Gregory Fenton Date: Wed, 8 Jul 2020 12:42:21 +0100 Subject: [PATCH] Added ImageMagick instructions per https://github.com/eried/portapack-mayhem/issues/93#issuecomment-655437363 --- Create-a-custom-splash-screen.md | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/Create-a-custom-splash-screen.md b/Create-a-custom-splash-screen.md index d74ad11..27ede87 100644 --- a/Create-a-custom-splash-screen.md +++ b/Create-a-custom-splash-screen.md @@ -36,3 +36,17 @@ cp ~/Pictures/bmp_splash.hpp firmware/application/bitmaps/bmp_splash.hpp Finally, rebuild the source and flash the HackRF One and PortaPack. +---------------------- +Someone asked whether it would be possible to just load a .PNG or .JPG image into the device. + +A quick solution to this would be to use the [ImageMagick](https://imagemagick.org/script/download.php) ```convert``` function which would take an image, resize it to fit the screen and change the filetype to a 4 bit RLE .BMP image in one step, meaning you just create a suitable image, save it as a .JPG or .PNG (or whatever type you prefer). + +If the file is already the correct resolution: +```convert filename.jpg -type Palette -compress RLE -colors 16 BMP3:splash.bmp +xxd -i splash.bmp bmp_splash.hpp``` + +If the file needs resizing to fit: +```convert -resize 240x304 filename.jpg -type Palette -compress RLE -colors 16 BMP3:splash.bmp +xxd -i splash.bmp bmp_splash.hpp``` + +Note that the ```-resize 240x304``` part of the line will not necessarily resize the new image to exactly 240x304px, it will keep the aspect ratio so that one of the sides will be correct and the other one will scale properly.