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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/>.
*/
#ifndef GRUB_BITMAP_HEADER
#define GRUB_BITMAP_HEADER 1
#include <grub/err.h>
#include <grub/symbol.h>
#include <grub/types.h>
#include <grub/video.h>
#include <grub/safemath.h>
#define IMAGE_HW_MAX_PX 16384
struct grub_video_bitmap
{
/* Bitmap format description. */
struct grub_video_mode_info mode_info;
/* Pointer to bitmap data formatted according to mode_info. */
void *data;
};
struct grub_video_bitmap_reader
{
/* File extension for this bitmap type (including dot). */
const char *extension;
/* Reader function to load bitmap. */
grub_err_t (*reader) (struct grub_video_bitmap **bitmap,
const char *filename);
/* Next reader. */
struct grub_video_bitmap_reader *next;
};
typedef struct grub_video_bitmap_reader *grub_video_bitmap_reader_t;
void EXPORT_FUNC (grub_video_bitmap_reader_register) (grub_video_bitmap_reader_t reader);
void EXPORT_FUNC (grub_video_bitmap_reader_unregister) (grub_video_bitmap_reader_t reader);
grub_err_t EXPORT_FUNC (grub_video_bitmap_create) (struct grub_video_bitmap **bitmap,
unsigned int width, unsigned int height,
enum grub_video_blit_format blit_format);
grub_err_t EXPORT_FUNC (grub_video_bitmap_destroy) (struct grub_video_bitmap *bitmap);
grub_err_t EXPORT_FUNC (grub_video_bitmap_load) (struct grub_video_bitmap **bitmap,
const char *filename);
/* Return bitmap width. */
static inline unsigned int
grub_video_bitmap_get_width (struct grub_video_bitmap *bitmap)
{
if (!bitmap)
return 0;
return bitmap->mode_info.width;
}
/* Return bitmap height. */
static inline unsigned int
grub_video_bitmap_get_height (struct grub_video_bitmap *bitmap)
{
if (!bitmap)
return 0;
return bitmap->mode_info.height;
}
/*
* Calculate and store the size of data buffer of 1bit bitmap in result.
* Equivalent to "*result = (width * height + 7) / 8" if no overflow occurs.
* Return true when overflow occurs or false if there is no overflow.
* This function is intentionally implemented as a macro instead of
* an inline function. Although a bit awkward, it preserves data types for
* safemath macros and reduces macro side effects as much as possible.
*
* XXX: Will report false overflow if width * height > UINT64_MAX.
*/
#define grub_video_bitmap_calc_1bpp_bufsz(width, height, result) \
({ \
grub_uint64_t _bitmap_pixels; \
grub_mul ((width), (height), &_bitmap_pixels) ? 1 : \
grub_cast (_bitmap_pixels / GRUB_CHAR_BIT + !!(_bitmap_pixels % GRUB_CHAR_BIT), (result)); \
})
void EXPORT_FUNC (grub_video_bitmap_get_mode_info) (struct grub_video_bitmap *bitmap,
struct grub_video_mode_info *mode_info);
void *EXPORT_FUNC (grub_video_bitmap_get_data) (struct grub_video_bitmap *bitmap);
#endif /* ! GRUB_BITMAP_HEADER */
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