Lncvrt/grub
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Improved performance by not requiring updating swap in gfxterm

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Vladimir 'phcoder' Serbinenko committed 2009-11-14 17:59:11 +01:00
1 parent 1f56d83788
commit bbe73b0995
3 files changed
+77 -33
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video/i386/pc/vbe.c
+35 -15
View File
@@ -418,10 +418,11 @@ doublebuf_pageflipping_update_screen (struct grub_video_fbrender_target *front
return err;
}
grub_memcpy (framebuffer.ptr + framebuffer.render_page
* framebuffer.page_size, framebuffer.ptr
+ framebuffer.displayed_page * framebuffer.page_size,
framebuffer.page_size);
if (framebuffer.mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP)
grub_memcpy (framebuffer.ptr + framebuffer.render_page
* framebuffer.page_size, framebuffer.ptr
+ framebuffer.displayed_page * framebuffer.page_size,
framebuffer.page_size);
target = framebuffer.back_target;
framebuffer.back_target = framebuffer.front_target;
@@ -486,19 +487,38 @@ static grub_err_t
double_buffering_init (unsigned int mode_type, unsigned int mode_mask)
{
grub_err_t err;
int updating_swap_needed;
updating_swap_needed
= grub_video_check_mode_flag (mode_type, mode_mask,
GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP, 0);
/* Do double buffering only if it's either requested or efficient. */
if (grub_video_check_mode_flag (mode_type, mode_mask,
GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED, 1))
GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED,
!updating_swap_needed))
{
framebuffer.mode_info.mode_type |= GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
if (updating_swap_needed)
framebuffer.mode_info.mode_type |= GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP;
err = doublebuf_pageflipping_init ();
if (!err)
{
framebuffer.mode_info.mode_type
|= GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
return GRUB_ERR_NONE;
}
return GRUB_ERR_NONE;
framebuffer.mode_info.mode_type
&= ~(GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
grub_errno = GRUB_ERR_NONE;
}
if (grub_video_check_mode_flag (mode_type, mode_mask,
GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED,
0))
{
framebuffer.mode_info.mode_type
|= (GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
err = grub_video_fb_doublebuf_blit_init (&framebuffer.front_target,
&framebuffer.back_target,
@@ -507,11 +527,11 @@ double_buffering_init (unsigned int mode_type, unsigned int mode_mask)
framebuffer.ptr);
if (!err)
{
framebuffer.mode_info.mode_type
|= GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
return GRUB_ERR_NONE;
}
return GRUB_ERR_NONE;
framebuffer.mode_info.mode_type
&= ~(GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP);
grub_errno = GRUB_ERR_NONE;
}