On Sun, Jan 19, 2014 at 5:59 AM, Kay Sievers <k...@vrfy.org> wrote: > On Fri, Jan 17, 2014 at 12:18 PM, Ylinen, Mikko <mikko.yli...@intel.com> > wrote: > > >> Could we first try to optimize the BMP loader? Also, could you share > >> your test image so I can have a look? > > > > > > We've simply used the web page logo [1] exported using Gimp: > > > > $ identify gummiboot-icon3.bmp > > gummiboot-icon3.bmp BMP 295x245 295x245+0+0 8-bit DirectClass 218KB > 0.000u > > 0:00.000 > > Unfortunately that doesn't say much. What color-depth is it? Do you > also use an alpha channel? > > Gimp automatically imports the alpha channel from the SVG background > layer. With alpha, it is the slowest of the options we have, we have > to calculate every byte by merging the original with the pict and > store it back. > > This is the one in the gummiboot git tree: > $ identify test/splash.bmp > test/splash.bmp BMP 295x245 295x245+0+0 8-bit sRGB 289KB 0.000u 0:00.000 > It's 32bit/pixel, with an alpha channel. > > It's a bit larger, your pict is 24 bit?
I verified the numbers and used test/splash.bmp as the source image. Looks like test/splash.bmp only adds 10ms more compared with BGRX. My original BMP is 24bit, no alpha. As far as I can tell this is the same as test/splash.bmp but without alpha channel. -- Mikko
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