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/* bitmap_scale.h - Bitmap scaling functions. */
/*
* GRUB -- GRand Unified Bootloader
* Copyright (C) 2008,2009 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_SCALE_HEADER
#define GRUB_BITMAP_SCALE_HEADER 1
#include <grub/err.h>
#include <grub/types.h>
#include <grub/bitmap_scale.h>
enum grub_video_bitmap_scale_method
{
/* Choose the fastest interpolation algorithm. */
GRUB_VIDEO_BITMAP_SCALE_METHOD_FASTEST,
/* Choose the highest quality interpolation algorithm. */
GRUB_VIDEO_BITMAP_SCALE_METHOD_BEST,
/* Specific algorithms: */
/* Nearest neighbor interpolation. */
GRUB_VIDEO_BITMAP_SCALE_METHOD_NEAREST,
/* Bilinear interpolation. */
GRUB_VIDEO_BITMAP_SCALE_METHOD_BILINEAR
};
typedef enum grub_video_bitmap_selection_method
{
GRUB_VIDEO_BITMAP_SELECTION_METHOD_STRETCH,
GRUB_VIDEO_BITMAP_SELECTION_METHOD_CROP,
GRUB_VIDEO_BITMAP_SELECTION_METHOD_PADDING,
GRUB_VIDEO_BITMAP_SELECTION_METHOD_FITWIDTH,
GRUB_VIDEO_BITMAP_SELECTION_METHOD_FITHEIGHT
} grub_video_bitmap_selection_method_t;
typedef enum grub_video_bitmap_v_align
{
GRUB_VIDEO_BITMAP_V_ALIGN_TOP,
GRUB_VIDEO_BITMAP_V_ALIGN_CENTER,
GRUB_VIDEO_BITMAP_V_ALIGN_BOTTOM
} grub_video_bitmap_v_align_t;
typedef enum grub_video_bitmap_h_align
{
GRUB_VIDEO_BITMAP_H_ALIGN_LEFT,
GRUB_VIDEO_BITMAP_H_ALIGN_CENTER,
GRUB_VIDEO_BITMAP_H_ALIGN_RIGHT
} grub_video_bitmap_h_align_t;
grub_err_t
EXPORT_FUNC (grub_video_bitmap_create_scaled) (struct grub_video_bitmap **dst,
int dst_width, int dst_height,
struct grub_video_bitmap *src,
enum
grub_video_bitmap_scale_method
scale_method);
grub_err_t
EXPORT_FUNC (grub_video_bitmap_scale_proportional)
(struct grub_video_bitmap **dst,
int dst_width, int dst_height,
struct grub_video_bitmap *src,
enum grub_video_bitmap_scale_method
scale_method,
grub_video_bitmap_selection_method_t
selection_method,
grub_video_bitmap_v_align_t v_align,
grub_video_bitmap_h_align_t h_align);
#endif /* ! GRUB_BITMAP_SCALE_HEADER */
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