151 lines
3.2 KiB
C
151 lines
3.2 KiB
C
/*
|
|
* GRUB -- GRand Unified Bootloader
|
|
* Copyright (C) 2006 Free Software Foundation, Inc.
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation; either version 2 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <grub/machine/vbeutil.h>
|
|
#include <grub/types.h>
|
|
#include <grub/video.h>
|
|
|
|
grub_uint8_t *
|
|
get_data_ptr (struct grub_video_i386_vbeblit_info *source,
|
|
unsigned int x, unsigned int y)
|
|
{
|
|
grub_uint8_t *ptr = 0;
|
|
|
|
switch (source->mode_info->bpp)
|
|
{
|
|
case 32:
|
|
ptr = (grub_uint8_t *)source->data
|
|
+ y * source->mode_info->pitch
|
|
+ x * 4;
|
|
break;
|
|
|
|
case 24:
|
|
ptr = (grub_uint8_t *)source->data
|
|
+ y * source->mode_info->pitch
|
|
+ x * 3;
|
|
break;
|
|
|
|
case 16:
|
|
case 15:
|
|
ptr = (grub_uint8_t *)source->data
|
|
+ y * source->mode_info->pitch
|
|
+ x * 2;
|
|
break;
|
|
|
|
case 8:
|
|
ptr = (grub_uint8_t *)source->data
|
|
+ y * source->mode_info->pitch
|
|
+ x;
|
|
break;
|
|
}
|
|
|
|
return ptr;
|
|
}
|
|
|
|
grub_video_color_t
|
|
get_pixel (struct grub_video_i386_vbeblit_info *source,
|
|
unsigned int x, unsigned int y)
|
|
{
|
|
grub_video_color_t color = 0;
|
|
|
|
switch (source->mode_info->bpp)
|
|
{
|
|
case 32:
|
|
color = *(grub_uint32_t *)get_data_ptr (source, x, y);
|
|
break;
|
|
|
|
case 24:
|
|
{
|
|
grub_uint8_t *ptr;
|
|
ptr = get_data_ptr (source, x, y);
|
|
color = ptr[0] | (ptr[1] << 8) | (ptr[2] << 16);
|
|
}
|
|
break;
|
|
|
|
case 16:
|
|
case 15:
|
|
color = *(grub_uint16_t *)get_data_ptr (source, x, y);
|
|
break;
|
|
|
|
case 8:
|
|
color = *(grub_uint8_t *)get_data_ptr (source, x, y);
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return color;
|
|
}
|
|
|
|
void
|
|
set_pixel (struct grub_video_i386_vbeblit_info *source,
|
|
unsigned int x, unsigned int y, grub_video_color_t color)
|
|
{
|
|
switch (source->mode_info->bpp)
|
|
{
|
|
case 32:
|
|
{
|
|
grub_uint32_t *ptr;
|
|
|
|
ptr = (grub_uint32_t *)get_data_ptr (source, x, y);
|
|
|
|
*ptr = color;
|
|
}
|
|
break;
|
|
|
|
case 24:
|
|
{
|
|
grub_uint8_t *ptr;
|
|
grub_uint8_t *colorptr = (grub_uint8_t *)&color;
|
|
|
|
ptr = get_data_ptr (source, x, y);
|
|
|
|
ptr[0] = colorptr[0];
|
|
ptr[1] = colorptr[1];
|
|
ptr[2] = colorptr[2];
|
|
}
|
|
break;
|
|
|
|
case 16:
|
|
case 15:
|
|
{
|
|
grub_uint16_t *ptr;
|
|
|
|
ptr = (grub_uint16_t *)get_data_ptr (source, x, y);
|
|
|
|
*ptr = (grub_uint16_t) (color & 0xFFFF);
|
|
}
|
|
break;
|
|
|
|
case 8:
|
|
{
|
|
grub_uint8_t *ptr;
|
|
|
|
ptr = (grub_uint8_t *)get_data_ptr (source, x, y);
|
|
|
|
*ptr = (grub_uint8_t) (color & 0xFF);
|
|
}
|
|
break;
|
|
|
|
default:
|
|
break;
|
|
}
|
|
}
|