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/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2006,2007 Free Software Foundation, Inc.
*
* GRUB 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 3 of the License, or
* (at your option) any later version.
*
* GRUB 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 GRUB. If not, see <http://www.gnu.org/licenses/>.
*/
/* NOTE: This header is private header for vbe driver and should not be used
in other parts of the code. */
#ifndef GRUB_VBEUTIL_MACHINE_HEADER
#define GRUB_VBEUTIL_MACHINE_HEADER 1
#include <grub/types.h>
#include <grub/video.h>
struct grub_video_fbblit_info
{
struct grub_video_mode_info *mode_info;
grub_uint8_t *data;
};
/*
* Don't use for 1-bit bitmaps, addressing needs to be done at the bit level
* and it doesn't make sense, in general, to ask for a pointer
* to a particular pixel's data.
*
* This function assumes that bounds checking has been done in previous phase
* and they are opted out in here.
*/
static inline void *
grub_video_fb_get_video_ptr (struct grub_video_fbblit_info *source,
unsigned int x, unsigned int y)
{
return source->data + (grub_addr_t) y * source->mode_info->pitch + (grub_addr_t) x * source->mode_info->bytes_per_pixel;
}
/* Advance pointer by VAL bytes. If there is no unaligned access available,
VAL has to be divisible by size of pointed type.
*/
#ifdef GRUB_HAVE_UNALIGNED_ACCESS
#define GRUB_VIDEO_FB_ADVANCE_POINTER(ptr, val) ((ptr) = (typeof (ptr)) ((char *) ptr + val))
#else
#define GRUB_VIDEO_FB_ADVANCE_POINTER(ptr, val) ((ptr) += (val) / sizeof (*(ptr)))
#endif
grub_video_color_t get_pixel (struct grub_video_fbblit_info *source,
unsigned int x, unsigned int y);
void set_pixel (struct grub_video_fbblit_info *source,
unsigned int x, unsigned int y, grub_video_color_t color);
#endif /* ! GRUB_VBEUTIL_MACHINE_HEADER */
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