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* grub-core/video/i386/pc/vga.c: Fix double bufferring and

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add mode 0x12.
This commit is contained in:
Vladimir Serbinenko 2013-11-05 02:41:50 +01:00
parent 76681e714e
commit 3fe63754d2
2 changed files with 32 additions and 16 deletions
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5
ChangeLog
View file

@ -1,3 +1,8 @@
2013-11-05 Vladimir Serbinenko <phcoder@gmail.com>
* grub-core/video/i386/pc/vga.c: Fix double bufferring and
add mode 0x12.
2013-11-04 Vladimir Serbinenko <phcoder@gmail.com>
* docs/grub.texi (Vendor power-on keys): Add XPS M1330M based on old

43
grub-core/video/i386/pc/vga.c
View file

@ -32,12 +32,12 @@
GRUB_MOD_LICENSE ("GPLv3+");
#define VGA_WIDTH 640
#define VGA_HEIGHT 350
#define VGA_MEM ((grub_uint8_t *) 0xa0000)
#define PAGE_OFFSET(x) ((x) * (VGA_WIDTH * VGA_HEIGHT / 8))
#define PAGE_OFFSET(x) ((x) * (VGA_WIDTH * vga_height / 8))
static unsigned char text_mode;
static unsigned char saved_map_mask;
static int vga_height;
static struct
{
@ -122,10 +122,12 @@ grub_video_vga_setup (unsigned int width, unsigned int height,
{
grub_err_t err;
if ((width && width != VGA_WIDTH) || (height && height != VGA_HEIGHT))
if ((width && width != VGA_WIDTH) || (height && height != 350 && height != 480))
return grub_error (GRUB_ERR_UNKNOWN_DEVICE, "no matching mode found");
framebuffer.temporary_buffer = grub_malloc (VGA_HEIGHT * VGA_WIDTH);
vga_height = height ? : 480;
framebuffer.temporary_buffer = grub_malloc (vga_height * VGA_WIDTH);
framebuffer.front_page = 0;
framebuffer.back_page = 0;
if (!framebuffer.temporary_buffer)
@ -133,21 +135,23 @@ grub_video_vga_setup (unsigned int width, unsigned int height,
saved_map_mask = get_map_mask ();
text_mode = grub_vga_set_mode (0x10);
text_mode = grub_vga_set_mode (vga_height == 480 ? 0x12 : 0x10);
setup = 1;
set_map_mask (0x0f);
set_start_address (PAGE_OFFSET (framebuffer.front_page));
framebuffer.mode_info.width = VGA_WIDTH;
framebuffer.mode_info.height = VGA_HEIGHT;
framebuffer.mode_info.height = vga_height;
framebuffer.mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_INDEX_COLOR;
if (grub_video_check_mode_flag (mode_type, mode_mask,
GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED, 1))
GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED,
(VGA_WIDTH * vga_height <= (1 << 18))))
{
framebuffer.back_page = 1;
framebuffer.mode_info.mode_type |= GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED;
framebuffer.mode_info.mode_type |= GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED
| GRUB_VIDEO_MODE_TYPE_UPDATING_SWAP;
}
framebuffer.mode_info.bpp = 8;
@ -219,7 +223,7 @@ update_target (void)
set_map_mask (plane);
for (ptr = framebuffer.temporary_buffer,
ptr2 = VGA_MEM + PAGE_OFFSET (framebuffer.back_page);
ptr < framebuffer.temporary_buffer + VGA_WIDTH * VGA_HEIGHT; ptr++)
ptr < framebuffer.temporary_buffer + VGA_WIDTH * vga_height; ptr++)
{
cbyte |= (!!(plane & *ptr)) << shift;
shift--;
@ -242,7 +246,8 @@ grub_video_vga_blit_bitmap (struct grub_video_bitmap *bitmap,
grub_err_t ret;
ret = grub_video_fb_blit_bitmap (bitmap, oper, x, y, offset_x, offset_y,
width, height);
update_target ();
if (!(framebuffer.mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED))
update_target ();
return ret;
}
@ -256,7 +261,8 @@ grub_video_vga_blit_render_target (struct grub_video_fbrender_target *source,
ret = grub_video_fb_blit_render_target (source, oper, x, y,
offset_x, offset_y, width, height);
update_target ();
if (!(framebuffer.mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED))
update_target ();
return ret;
}
@ -295,11 +301,16 @@ grub_video_vga_swap_buffers (void)
if (!(framebuffer.mode_info.mode_type & GRUB_VIDEO_MODE_TYPE_DOUBLE_BUFFERED))
return GRUB_ERR_NONE;
/* Activate the other page. */
framebuffer.front_page = !framebuffer.front_page;
framebuffer.back_page = !framebuffer.back_page;
wait_vretrace ();
set_start_address (PAGE_OFFSET (framebuffer.front_page));
update_target ();
if ((VGA_WIDTH * vga_height <= (1 << 18)))
{
/* Activate the other page. */
framebuffer.front_page = !framebuffer.front_page;
framebuffer.back_page = !framebuffer.back_page;
wait_vretrace ();
set_start_address (PAGE_OFFSET (framebuffer.front_page));
}
return GRUB_ERR_NONE;
}