diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/Kconfig | 57 |
1 files changed, 56 insertions, 1 deletions
diff --git a/src/Kconfig b/src/Kconfig index f5ba4fc784..ea6f341f78 100644 --- a/src/Kconfig +++ b/src/Kconfig @@ -447,7 +447,54 @@ config BOOTSPLASH_FILE # Default value set at the end of the file help The path and filename of the file to use as graphical bootsplash - screen. The file format has to be jpg. + screen. The file format has to be JPEG with YCC 4:2:0 color sampling + unless converted with "Pre-process bootsplash file with ImageMagick". + + The image can only be displayed by coreboot if it's smaller or has + the same size as the framebuffer resolution. Width and height have + to be a multiple of 16 pixels. + + Setting these constraints allows a leaner implementation in coreboot. + The minimum necessary ImageMagick command line seems to be: + $ convert input.img -colorspace YCC -sampling-factor 4:2:0 bootsplash.jpg + +config BOOTSPLASH_CONVERT + bool "Pre-process bootsplash file with ImageMagick" + depends on BOOTSPLASH_IMAGE + help + Use ImageMagick (`convert` program) to convert a bootsplash image + to the supported JPEG format. + +config BOOTSPLASH_CONVERT_QUALITY + int "Bootsplash JPEG target quality (%)" + depends on BOOTSPLASH_CONVERT + range 1 100 + # Default value set at the end of the file + +config BOOTSPLASH_CONVERT_RESIZE + bool "Resize bootsplash image" + depends on BOOTSPLASH_CONVERT + help + Resize the image to the given resolution. Aspect ratio will be kept, + adding black bars as necessary. + +config BOOTSPLASH_CONVERT_RESOLUTION + string "Bootsplash image target size" + depends on BOOTSPLASH_CONVERT_RESIZE + # Default value set at the end of the file + help + Target image resolution given as <width>x<height>, e.g. 1024x768. + Values not divisible by 16 will be rounded down. + + When using coreboot to display the bootsplash image (CONFIG_BOOTSPLASH), + set this lower or equal to the minimum resolution you expect. + +config BOOTSPLASH_CONVERT_COLORSWAP + bool "Swap red and blue color channels" + depends on BOOTSPLASH_CONVERT + help + The JPEG decoder currently ignores the framebuffer color order. + If your colors seem all wrong, try this option. config FW_CONFIG bool "Firmware Configuration Probing" @@ -1444,6 +1491,14 @@ config BOOTSPLASH_FILE depends on BOOTSPLASH_IMAGE default "bootsplash.jpg" +config BOOTSPLASH_CONVERT_QUALITY + depends on BOOTSPLASH_CONVERT + default 80 + +config BOOTSPLASH_CONVERT_RESOLUTION + depends on BOOTSPLASH_CONVERT_RESIZE + default "1024x768" + config CBFS_SIZE default ROM_SIZE |