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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2008 by Akio Idehara
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef _RESIZE_H_
#define _RESIZE_H_
#include "config.h"
#include "lcd.h"
#include "inttypes.h"
/****************************************************************
* resize_on_load()
*
* resize bitmap on load with scaling
*
* If HAVE_LCD_COLOR then this func use smooth scaling algorithm
* - downscaling both way use "Area Sampling"
* if IMG_RESIZE_BILINER or IMG_RESIZE_NEAREST is NOT set
* - otherwise "Bilinear" or "Nearest Neighbour"
*
* If !(HAVE_LCD_COLOR) then use simple scaling algorithm "Nearest Neighbour"
*
* return -1 for error
****************************************************************/
/* nothing needs the on-stack buffer right now */
#define MAX_SC_STACK_ALLOC 0
#define HAVE_UPSCALER 1
#define SC_OUT(n, c) (((n) + (1 << 23)) >> 24)
#ifndef SC_OUT
#define SC_OUT(n, c) (sc_mul_u32_rnd(n, (c)->recip))
#endif
struct img_part {
int len;
#if !defined(HAVE_LCD_COLOR)
uint8_t *buf;
#else
struct uint8_rgb* buf;
#endif
};
#ifdef HAVE_LCD_COLOR
/* intermediate type used by the scaler for color output. greyscale version
uses uint32_t
*/
struct uint32_argb {
uint32_t r;
uint32_t g;
uint32_t b;
uint32_t a;
};
#endif
/* struct which contains various parameters shared between vertical scaler,
horizontal scaler, and row output
*/
struct scaler_context {
uint32_t h_i_val;
uint32_t h_o_val;
uint32_t v_i_val;
uint32_t v_o_val;
struct bitmap *bm;
struct dim *src;
unsigned char *buf;
bool dither;
int len;
void *args;
struct img_part* (*store_part)(void *);
void (*output_row)(uint32_t,void*,struct scaler_context*);
bool (*h_scaler)(void*,struct scaler_context*, bool);
};
#if defined(HAVE_LCD_COLOR)
#define IF_PIX_FMT(...) __VA_ARGS__
#else
#define IF_PIX_FMT(...)
#endif
struct custom_format {
void (*output_row_8)(uint32_t,void*, struct scaler_context*);
#if defined(HAVE_LCD_COLOR)
void (*output_row_32[2])(uint32_t,void*, struct scaler_context*);
#else
void (*output_row_32)(uint32_t,void*, struct scaler_context*);
#endif
unsigned int (*get_size)(struct bitmap *bm);
};
struct rowset;
extern const struct custom_format format_native;
int recalc_dimension(struct dim *dst, struct dim *src);
int resize_on_load(struct bitmap *bm, bool dither,
struct dim *src, struct rowset *tmp_row,
unsigned char *buf, unsigned int len,
const struct custom_format *cformat,
IF_PIX_FMT(int format_index,)
struct img_part* (*store_part)(void *args),
void *args);
#endif /* _RESIZE_H_ */
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