Commit dfa6ce63 authored by Vincent Mailhol's avatar Vincent Mailhol Committed by Helge Deller
Browse files

video/logo: allow custom logo 

Some people like to replace the default Tux boot logo by an image of
their own. There exist a few tutorials here [1] and there [2]. But
this requires modifying the source tree which is a bit cumbersome.

Add a string entry in Kbuild for each of the logo categories
(monochrome, 16-colors, 224-colors). The string entry takes a path to
a .pbm or .ppm image allowing the user to more easily provide a custom
logo without having to modify the sources.

Add an help entry with a short hint on how to convert images to the
portable pixmap file format.

Update the Makefile accordingly. When converted to .c file, the logo
will have one of these fixed file name:

  - logo_linux_mono.c
  - logo_linux_vga16.c
  - logo_linux_clut224.c:

depending on the image type and this regardless of the name of the
.pgm/.ppm source filename. This will allow for further simplifications
in an upcoming change.

[1] ArmadeuS Project wiki -- Linux Boot Logo
Link: https://www.armadeus.org/wiki/index.php?title=Linux_Boot_Logo

[2] Timesys -- How To Use a Custom Boot Logo / Splash Screen
Link: https://linuxlink.timesys.com/docs/wiki/engineering/HOWTO_Use_a_custom_boot_logo



Signed-off-by: default avatarVincent Mailhol <mailhol@kernel.org>
Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent a7aa2b51

drivers/video/logo/Kconfig

+41 −0
Original line number Diff line number Diff line
@@ -22,14 +22,55 @@ config LOGO_LINUX_MONO 
	bool "Standard black and white Linux logo"

	default y



config LOGO_LINUX_MONO_FILE

	string "Monochrome logo .pbm file"

	depends on LOGO_LINUX_MONO

	default "drivers/video/logo/logo_linux_mono.pbm"

	help

	  Takes a path to a monochromatic logo in the portable pixmap file

	  format (.pbm). This defaults to the Tux penguin.



	  For example, the below ImageMagick command can be used to reduce

	  an image to black and white and convert it into a pbm file:



	    magick source_image -compress none destination.pbm



config LOGO_LINUX_VGA16

	bool "Standard 16-color Linux logo"

	default y



config LOGO_LINUX_VGA16_FILE

	string "16-color logo .ppm file"

	depends on LOGO_LINUX_VGA16

	default "drivers/video/logo/logo_linux_vga16.ppm"

	help

	  Takes a path to a logo in the portable pixmap file format (.ppm),

	  using the 16 colors from the drivers/video/logo/clut_vga16.ppm

	  palette. This defaults to the Tux penguin.



	  For example, the below ImageMagick command can be used to reduce an

	  image to the VGA 16 colors palette and convert into a ppm file:



	    magick source_image -compress none \

	      -remap drivers/video/logo/clut_vga16.ppm destination.ppm



config LOGO_LINUX_CLUT224

	bool "Standard 224-color Linux logo"

	default y



config LOGO_LINUX_CLUT224_FILE

	string "224-color logo .ppm file"

	depends on LOGO_LINUX_CLUT224

	default "drivers/video/logo/logo_linux_clut224.ppm"

	help

	  Takes a path to a 224-color logo in the portable pixmap file

	  format (.ppm). This defaults to the Tux penguin.



	  For example, the below ImageMagick command can be used to reduce

	  an image palette to 224 colors and convert it into a ppm file:



	    magick source_image -compress none -colors 224 destination.ppm



config LOGO_DEC_CLUT224

	bool "224-color Digital Equipment Corporation Linux logo"

	depends on MACH_DECSTATION || ALPHA

drivers/video/logo/Makefile

+10 −1
Original line number Diff line number Diff line
@@ -22,7 +22,16 @@ hostprogs := pnmtologo 


# Create commands like "pnmtologo -t mono -n logo_mac_mono -o ..."

quiet_cmd_logo = LOGO    $@

      cmd_logo = $(obj)/pnmtologo -t $2 -n $* -o $@ $<

      cmd_logo = $(obj)/pnmtologo -t $2 -n $(basename $(notdir $@)) -o $@ $<



$(obj)/logo_linux_mono.c: $(CONFIG_LOGO_LINUX_MONO_FILE) $(obj)/pnmtologo FORCE

	$(call if_changed,logo,mono)



$(obj)/logo_linux_vga16.c: $(CONFIG_LOGO_LINUX_VGA16_FILE) $(obj)/pnmtologo FORCE

	$(call if_changed,logo,vga16)



$(obj)/logo_linux_clut224.c: $(CONFIG_LOGO_LINUX_CLUT224_FILE) $(obj)/pnmtologo FORCE

	$(call if_changed,logo,clut224)



$(obj)/%.c: $(src)/%.pbm $(obj)/pnmtologo FORCE

	$(call if_changed,logo,mono)