64 lines
2.2 KiB
C
64 lines
2.2 KiB
C
/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2006,2007 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* NOTE: This header is private header for vbe driver and should not be used
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in other parts of the code. */
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#ifndef GRUB_VBEUTIL_MACHINE_HEADER
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#define GRUB_VBEUTIL_MACHINE_HEADER 1
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#include <grub/types.h>
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#include <grub/video.h>
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struct grub_video_fbblit_info
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{
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struct grub_video_mode_info *mode_info;
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grub_uint8_t *data;
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};
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/*
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* Don't use for 1-bit bitmaps, addressing needs to be done at the bit level
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* and it doesn't make sense, in general, to ask for a pointer
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* to a particular pixel's data.
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*
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* This function assumes that bounds checking has been done in previous phase
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* and they are opted out in here.
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*/
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static inline void *
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grub_video_fb_get_video_ptr (struct grub_video_fbblit_info *source,
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unsigned int x, unsigned int y)
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{
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return source->data + (grub_addr_t) y * source->mode_info->pitch + (grub_addr_t) x * source->mode_info->bytes_per_pixel;
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}
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/* Advance pointer by VAL bytes. If there is no unaligned access available,
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VAL has to be divisible by size of pointed type.
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*/
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#ifdef GRUB_HAVE_UNALIGNED_ACCESS
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#define GRUB_VIDEO_FB_ADVANCE_POINTER(ptr, val) ((ptr) = (typeof (ptr)) ((char *) ptr + val))
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#else
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#define GRUB_VIDEO_FB_ADVANCE_POINTER(ptr, val) ((ptr) += (val) / sizeof (*(ptr)))
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#endif
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grub_video_color_t get_pixel (struct grub_video_fbblit_info *source,
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unsigned int x, unsigned int y);
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void set_pixel (struct grub_video_fbblit_info *source,
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unsigned int x, unsigned int y, grub_video_color_t color);
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#endif /* ! GRUB_VBEUTIL_MACHINE_HEADER */
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