Hi Tomaž, Thank you very much for your answer
>You probably reinvented some transform color transform I guess.. but >it is an interesting approach too. Yes! Of course, nowadays I'm sure there is another way of doing the same or even better! I just wanted to share that it's already quite easy to obtain a fair result (the code may look quite long but I guess it's because I'm using Fortran and programing as a chemical engineering). I shared it also because it's already working: it generates a valid LibO color palette. regards! 2016-09-27 18:52 GMT-03:00 Tomaž Vajngerl <qui...@gmail.com>: > Hi, > > On Tue, Sep 27, 2016 at 10:24 PM, Francisco Adrián Sánchez > <franciscoadriansanc...@gmail.com> wrote: > > Dear design team, > > > > My name is Francisco Sánchez, I'm a chemical engineer who loves doing his > > work with LibreOffice (even though I'm not always allowed to). Although > I'm > > not listed in the design team nor mailing list, I've already contributed > > some times with a few opinions and even I've presented some Impress > > templates for the 5.0 conquest. > > > > I've used OOs since 2009, and one thing that I had always missed from MS > > Office was the ability to generate a color palette from some theme > colors. > > > > Since I'm a chemical engineer that knows Fortran (yes, Fortran) I decided > > to code an app that were able to read some colors in RGB coordinates > > generating then a LibreOffice color palette. Since these files are just > > text files, I though they should be easy to produce using the only > language > > I know... Fortran. > > > > That said, first I analyzed the gradients that MS Office 2007 produces, > and > > correlated the resulting alteration of each coordinate for each gradient. > > For example, if one base color has a red coordinate of 50, the "clear > 90%" > > shadows will have a red value which is a function of 50. > > Pardon me if I don't know if there's an easier way to do this, it's just > > what I could do it. > > > > Astonishingly, there is a correlation (a polynomial one). Based on the > > coefficients I got, I coded the following app in Fortran. My app works > > fairly ok, producing pretty similar results to the one that can be found > in > > MS Office. > > > > I don't want to type a will here, but if you are interested on it I can > > email you a link to download the code and some instructions to compile. > I'm > > not leaving any link here because I fear that the antispam filter will > > catch this email. Thus, I've uploaded the code inside an ODT file into > the > > Document Foundation Wiki. Thus, if you are interested please look for the > > file: > > > > "File:Palette_Fortran_code.odt". > > > > There's an screenshot there also. > > > > Last, I'd like to make it clear that I'm not intending to say that you > > should include this code in LibreOffice, nor that LibreOffice should > > generate the same palettes than MSOffice does. > > > > However, I found my app quite useful for my proposes. Also, I know that > > some of you are already dealing with document themes. So, I think that > the > > idea behind it could be useful for you also. > > > > That said, I wish you will have a nice weekend. > > > > Best regards, > > > > Francisco > > It would be easier to use HSL colorspace instead of RGB. RGB is ideal > for monitors to produce a picture but not that good if you want to do > color manipulation. If you convert a RGB color to HSL colorspace you > have Hue - a 360 degree color value, Saturation of that color and > Lightness - how dark or light it is represented. This color > representation makes more sense and opens new possibilities. To get > the complementary color you just rotate the hue for 180°, adjacent > colors +-30°, desaturate a color, just lower the saturation... > > So to make a set of colors you can just select some fixed saturation > and lightness values and then "rotate" the hue "wheel" and you get > your first set, then repeat. > > What MS does with theme colors is tinting and shading, which is also > performed in HSL colorspace. Tinting means mixing the selected color > with white and shading is mixing with black (the value is in percent). > This is how they generate their palette, what I'm not sure exactly is > how they choose the mixing percentages. > > You probably reinvented some transform color transform I guess.. but > it is an interesting approach too. > > Regards, Tomaž > -- To unsubscribe e-mail to: design+unsubscr...@global.libreoffice.org Problems? http://www.libreoffice.org/get-help/mailing-lists/how-to-unsubscribe/ Posting guidelines + more: http://wiki.documentfoundation.org/Netiquette List archive: http://listarchives.libreoffice.org/global/design/ All messages sent to this list will be publicly archived and cannot be deleted
