Re: Grub2 Graphics In OS

[Tristan ross]

   Link to code:
   https://github.com/SpaceboyRoss01/ronix/blob/master/src/Kernel/system/g
   raphics.c

   Function is rgb
   8:16 PM, December 15, 2016, Andrei Borzenkov <address@hidden>:

     16.12.2016 07:02, Tristan ross пишет:

     Â I use GRUB2 to boot up and set graphical mode. The function reads
     the multiboot
     Â headers and uses it to render.

     Please post you code in plain text without any extra characters so
     it is
     readable. Or post direct link to your code.

     Â 7:45 PM, December 15, 2016, Andrei Borzenkov
     <address@hidden>:
          15.12.2016 22:29, Tristan ross пишет:
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â Hey, I've got my os to boot with grub2
     and it goes into graphics mode.
     Â Â Â Â Â "It" - grub or os?
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â I'm trying to set the rgb color of
     pixels but I just get blue when I
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â run my function to generate an rgb
     color.
     Â Â Â Â Â How is your function related to grub?
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â Code is at
     [1][2]https://github.com/SpaceboyRoss01/ronix
     Â Â Â Â Â There is no single commit message there to understand what
     you are doing.
                   Â
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â Code to generate color:
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â unsigned int graphics_color(int r,int
     g,int b) {
                   Â Â Â unsigned int color =
     ((r*1000)+(g*100)+(b*10));
     Â Â Â Â Â This is unreadable and in any case, posting random snippet
     without
     Â Â Â Â Â telling where this snippet comes from is useless. Please
     post in plain
     Â Â Â Â Â text and explain, where this code comes from and what you
     are attempting
     Â Â Â Â Â to do.
                   Â Â Â
     switch(graphics_mbi->framebuffer_type) {
                   Â Â Â Â Â Â Â case
     MULTIBOOT_FRAMEBUFFER_TYPE_RGB:
                   Â Â Â Â Â Â Â Â Â Â Â color =
     ((r <<
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â graphics_mbi->framebuffer_red_mask_size)
     - r) <<
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â graphics_mbi->framebuffer_red_field_posi
     tion;
                   Â Â Â Â Â Â Â Â Â Â Â color
     += ((g <<
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â graphics_mbi->framebuffer_green_mask_siz
     e) - g) <<
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â graphics_mbi->framebuffer_green_field_po
     sition;
                   Â Â Â Â Â Â Â Â Â Â Â color
     += ((b <<
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â graphics_mbi->framebuffer_blue_mask_size
     ) - b) <<
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â graphics_mbi->framebuffer_blue_field_pos
     ition;
                   Â Â Â Â Â Â Â Â Â Â Â break;
                   Â Â Â Â Â Â Â case
     MULTIBOOT_FRAMEBUFFER_TYPE_EGA_TEXT:
                   Â Â Â Â Â Â Â Â Â Â color =
     '\\' | ((r*1000)+(g*100)+(b*10));
                   Â Â Â Â Â Â Â Â Â Â break;
                   Â Â Â }
                   Â Â Â #ifdef DEBUG
                   Â Â Â debugf("RGB(%d,%d,%d) =
     %d\n",r,g,b,color);
                   Â Â Â #endif
                   Â Â Â return color;
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â }
                   Â
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â I'm running graphics_color(255,255,255)
     which returns -50200321
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â How do I fix this so it returns 16777215
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â I used the grub2 multiboot
     documentation.
     Â Â Â Â Â Â Â Â Â Â Â References
     Â Â Â Â Â Â Â Â Â Â Â Â Â Â 1.
     [3]https://github.com/SpaceboyRoss01/ronix
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References

   1. mailto:address@hidden
   2. https://github.com/SpaceboyRoss01/ronix
   3. https://github.com/SpaceboyRoss01/ronix
   4. mailto:address@hidden
   5. mailto:address@hidden
   6. https://lists.gnu.org/mailman/listinfo/help-grub