52f0f64384
* grub-core/video/fb/video_fb.c (dirty): New struct. (framebuffer): Add members current_dirty and previous_dirty. (dirty): New function. (grub_video_fb_fill_rect): Update dirty. (common_blitter): Likewise. (grub_video_fb_scroll): Likewise. (doublebuf_blit_update_screen): Copy only dirty part. (doublebuf_pageflipping_update_screen): Likewise. (grub_video_fb_doublebuf_blit_init): Init dirty. (doublebuf_pageflipping_init): Likewise. (grub_video_fb_setup): Likewise.
This is GRUB 2, the second version of the GRand Unified Bootloader. GRUB 2 is rewritten from scratch to make GNU GRUB cleaner, safer, more robust, more powerful, and more portable. See the file NEWS for a description of recent changes to GRUB 2. See the file INSTALL for instructions on how to build and install the GRUB 2 data and program files. Please visit the official web page of GRUB 2, for more information. The URL is <http://www.gnu.org/software/grub/grub.html>. More extensive documentation is available in the Info manual, accessible using 'info grub' after building and installing GRUB 2. Please look at the GRUB Wiki <http://grub.enbug.org> for testing procedures. There are a number of important user-visible differences from the first version of GRUB, now known as GRUB Legacy. For a summary, please see: info grub Introduction 'Changes from GRUB Legacy'