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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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4
include/grub/video_fb.h
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@ -115,10 +115,6 @@ grub_video_fb_get_active_render_target (struct grub_video_fbrender_target **targ
grub_err_t
grub_video_fb_set_active_render_target (struct grub_video_fbrender_target *target);
typedef grub_err_t
(*grub_video_fb_doublebuf_update_screen_t) (struct grub_video_fbrender_target *front,
struct grub_video_fbrender_target *back);
typedef grub_err_t (*grub_video_fb_set_page_t) (int page);
grub_err_t