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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
Download patch file Download diff file Expand all files Collapse all files

40
grub-core/video/ieee1275.c
View file

@ -40,7 +40,6 @@ static int have_setcolors = 0;
static struct
{
struct grub_video_mode_info mode_info;
struct grub_video_render_target *render_target;
grub_uint8_t *ptr;
} framebuffer;
@ -186,23 +185,12 @@ grub_video_ieee1275_setup (unsigned int width, unsigned int height,
grub_dprintf ("video", "IEEE1275: initialising FB @ %p %dx%dx%d\n",
framebuffer.ptr, framebuffer.mode_info.width,
framebuffer.mode_info.height, framebuffer.mode_info.bpp);
err = grub_video_fb_create_render_target_from_pointer
(&framebuffer.render_target, &framebuffer.mode_info, framebuffer.ptr);
err = grub_video_fb_setup (mode_type, mode_mask,
&framebuffer.mode_info,
framebuffer.ptr, NULL, NULL);
if (err)
{
grub_dprintf ("video", "IEEE1275: Couldn't create FB target\n");
return err;
}
err = grub_video_fb_set_active_render_target (framebuffer.render_target);
if (err)
{
grub_dprintf ("video", "IEEE1275: Couldn't set FB target\n");
return err;
}
return err;
grub_video_ieee1275_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
grub_video_fbstd_colors);
@ -210,22 +198,6 @@ grub_video_ieee1275_setup (unsigned int width, unsigned int height,
return err;
}
static grub_err_t
grub_video_ieee1275_swap_buffers (void)
{
/* TODO: Implement buffer swapping. */
return GRUB_ERR_NONE;
}
static grub_err_t
grub_video_ieee1275_set_active_render_target (struct grub_video_render_target *target)
{
if (target == GRUB_VIDEO_RENDER_TARGET_DISPLAY)
target = framebuffer.render_target;
return grub_video_fb_set_active_render_target (target);
}
static grub_err_t
grub_video_ieee1275_get_info_and_fini (struct grub_video_mode_info *mode_info,
void **framebuf)
@ -287,10 +259,10 @@ static struct grub_video_adapter grub_video_ieee1275_adapter =
.blit_bitmap = grub_video_fb_blit_bitmap,
.blit_render_target = grub_video_fb_blit_render_target,
.scroll = grub_video_fb_scroll,
.swap_buffers = grub_video_ieee1275_swap_buffers,
.swap_buffers = grub_video_fb_swap_buffers,
.create_render_target = grub_video_fb_create_render_target,
.delete_render_target = grub_video_fb_delete_render_target,
.set_active_render_target = grub_video_ieee1275_set_active_render_target,
.set_active_render_target = grub_video_fb_set_active_render_target,
.get_active_render_target = grub_video_fb_get_active_render_target,
.next = 0