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Avoid slow read-back from VRAM.

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* include/grub/video_fb.h (grub_video_fb_doublebuf_update_screen_t):
	Move from here ...
	* grub-core/video/fb/video_fb.c
	(grub_video_fb_doublebuf_update_screen_t): ... here. Remove arguments.
	* grub-core/video/fb/video_fb.c (framebuf_t): New type.
	(front_target): Remove front_target. Add pages.
	(grub_video_fb_init): Skip setting front_pages.
	(grub_video_fb_fini): Likewise.
	(doublebuf_blit_update_screen): Use pages.
	(grub_video_fb_doublebuf_blit_init): Likewise.
	(doublebuf_pageflipping_init): Allocate offscreen buffer.
	(doublebuf_pageflipping_update_screen): Use offscreen buffer.
	(grub_video_fb_setup): Prefer doublebuffing.
This commit is contained in:
Vladimir 'phcoder' Serbinenko 2012-06-15 23:57:20 +02:00
parent 377c98cba2
commit ba67e2c635
4 changed files with 83 additions and 128 deletions
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ChangeLog
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@ -1,3 +1,21 @@
2012-06-15 Vladimir Serbinenko <phcoder@gmail.com>
Avoid slow read-back from VRAM.
* include/grub/video_fb.h (grub_video_fb_doublebuf_update_screen_t):
Move from here ...
* grub-core/video/fb/video_fb.c
(grub_video_fb_doublebuf_update_screen_t): ... here. Remove arguments.
* grub-core/video/fb/video_fb.c (framebuf_t): New type.
(front_target): Remove front_target. Add pages.
(grub_video_fb_init): Skip setting front_pages.
(grub_video_fb_fini): Likewise.
(doublebuf_blit_update_screen): Use pages.
(grub_video_fb_doublebuf_blit_init): Likewise.
(doublebuf_pageflipping_init): Allocate offscreen buffer.
(doublebuf_pageflipping_update_screen): Use offscreen buffer.
(grub_video_fb_setup): Prefer doublebuffing.
2012-06-15 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/normal/main.c (GRUB_MOD_INIT): Ignore errors when loading