76 lines
2.9 KiB
Markdown
76 lines
2.9 KiB
Markdown
Pinephone A64 native resolution 1440x720 18:9 2:1
|
||
|
||
Display size: 5.32" × 2.66" = 14.16in² (13.52cm × 6.76cm = 91.36cm²) at 270.58 PPI, 0.0939mm dot pitch, 73215 PPI²
|
||
|
||
https://developer.toradex.com/linux-bsp/how-to/boot/splash-screen-on-u-boot/
|
||
|
||
|
||
* Inkscape
|
||
|
||
Load the svg to inkscape and export png
|
||
|
||
|
||
* Converting from PNG to BMP
|
||
|
||
U-Boot can read a specific image format. Use the following command to convert the PNG image to BPM.
|
||
SVG="Devuan-logo.svg"
|
||
PNG="Devuan-logo.png"
|
||
BMP="Devuan-logo.bmp"
|
||
inkscape --export-type="png" ${SVG}
|
||
convert ${PNG} -type Palette -colors 224 -depth 8 -compress none -verbose BMP3:${PNG}
|
||
|
||
SVG="Devuan-logo-swoosh.svg"
|
||
PNG="Devuan-logo-swoosh.png"
|
||
BMP="Devuan-logo-swoosh.bmp"
|
||
inkscape --export-type="png" ${SVG}
|
||
convert ${PNG} -type Palette -colors 224 -depth 8 -compress none -verbose BMP3:${BMP}
|
||
|
||
|
||
# The u-boot makefile sets the location of the logo image in LOGO_BMP
|
||
# It will look for logos/$(BOARD).bmp and logos/$(VENDOR).bmp so
|
||
# we can write it their instead.
|
||
# copy to the existing denx generic logo image location.
|
||
# tools/bmp_logo --gen-info ./tools/logos/denx.bmp > include/bmp_logo.h
|
||
# tools/bmp_logo --gen-bmp ./tools/logos/denx.bmp > include/bmp_logo_data.h
|
||
cp ~/${BMP} ${UBOOT_HOME}/tools/logos/denx.bmp
|
||
|
||
|
||
-----
|
||
* Using GIMP image dump
|
||
|
||
https://developer.ridgerun.com/wiki/index.php/How_to_change_uboot_splash_image
|
||
|
||
|
||
|
||
# Get image that you want to show in resolution smaller than your display resolution.
|
||
# Open the image using GIMP graphic application.
|
||
# Save the image using "save as" option.
|
||
# In the select box "Select File Type (by Extension)" select the format "c source code"
|
||
# Then you will get one windows with some options, in this window deselect all options (Use glibs types, use macros instead of struct, Use 1 byte run-length-encoding, Save alpha channel)
|
||
# Then save this file (changing the file extension from .c to .h) to
|
||
#* $DEVDIR/bootloader/uboot.*/src/board/davinci/common
|
||
# Change the variable value CONFIG_SPLASH_LOGO_FILE with the name of file used above. The CONFIG_SPLASH_LOGO_FILE configuration setting can be found in the Splash Screen section in your board file in the directory
|
||
#* $DEVDIR/bootloader/uboot.*/src/include/configs
|
||
# Clean and compile the bootloader
|
||
|
||
The form of the image-file must be similar to:
|
||
|
||
<syntaxhighlight lang="c">
|
||
/* GIMP RGB C-Source image dump (image.c) */
|
||
|
||
static const struct {
|
||
unsigned int width;
|
||
unsigned int height;
|
||
unsigned int bytes_per_pixel; /* 3:RGB, 4:RGBA */
|
||
unsigned char pixel_data[200 * 100 * 3 + 1];
|
||
} gimp_image = {
|
||
200, 100, 3,
|
||
"(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306"
|
||
"(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306"
|
||
"(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306"
|
||
"(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306(\237\306"
|
||
</syntaxhighlight>
|
||
|
||
Remember that normally the bootloader modifications are made using patches.
|
||
|