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I have two images in logo folder preinstalled in ebook (Pocketbook 612).
Well, I take them and see this information.
> identify 1_st.bmp
> 1_st.612.bmp BMP 600x800 600x800+0+0 8-bit PseudoClass 256c 481KB 0.000u 0:00.010
Next, I try to create same formatted images with convert utility of imagemagick and with gimp.
Convert utility
I use this command to create images:
convert Ah.jpg -resize !600x800 -colorspace Gray -depth 8 -type palette Ah.bmp
And identify check:
> identify Ah.bmp
> Ah.bmp BMP 600x800 600x800+0+0 8-bit PseudoClass 256c 508KB 0.020u 0:00.030
But book says: unsupported format
GIMP
I try to create pictures by gimp, cut them to size 600x800 and use grayscale mode.
And identify check:
identify Oh.bmp
Oh.bmp BMP 600x800 600x800+0+0 8-bit DirectClass 1.44MB 0.000u 0:00.010
Again, book says: unsupported format
Also, I rename pictures with suffix .612 (Oh.612.bmp) but this method doesn't work too.
Could anybody help me?
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I met with same problem on my Pocketbook 912, and after some time I figured out how to solve it. BMP should be in indexed color mode and without compression. ImageMagick by default producing RLE compressed bmp.
For indexed palette I am using default logo image 1_st.912.bmp.
So if you have image with right resolution you can do this:
$ convert someimage.png
-background white
-alpha remove
-depth 8
-colors 256
-type grayscale
-remap 1_st.912.bmp
-dither FloydSteinberg
-compress none BMP3:outlogo.912.bmp
Here's another example, how I converted OpenBSD's puffy to pocketbook logo.
$ wget -O Puffy.gif www.openbsd.org/art/puffy/puf800X689.gif # download image
$ convert Puffy.gif
-background white -gravity center -extent 825x1200
-alpha remove -depth 8 -colors 256 -type grayscale
-remap 1_st.912.bmp -dither FloydSteinberg -compress none
BMP3:puffy.912.bmp
This command will resize canvas, center original image and convert it to supported by pocketbook bmp file. Note: since you have other resolution, you should change 825x1200 string to your device's resolution.
Free books android app tbrJar TBR JAR Read Free books online gutenberg