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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2006 by Antoine Cellerier <dionoea -at- videolan -dot- org>
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "bmp.h"
#include "lcd.h"
#include "file.h"
#include "lcd.h"
#include "system.h"
#ifdef HAVE_LCD_COLOR
#define LE16(x) (htole16(x))&0xff, ((htole16(x))>>8)&0xff
#define LE32(x) (htole32(x))&0xff, ((htole32(x))>>8)&0xff, ((htole32(x))>>16)&0xff, ((htole32(x))>>24)&0xff
/**
* Save to 24 bit bitmap.
*/
int save_bmp_file( char* filename, struct bitmap *bm, struct plugin_api* rb )
{
/* I'm not really sure about this one :) */
int line_width = bm->width*3+((bm->width*3)%4?4-((bm->width*3)%4):0);
const unsigned char header[] =
{
0x42, 0x4d, /* signature - 'BM' */
LE32( bm->height*line_width + 54 + 4*0 ), /* file size in bytes */
0x00, 0x00, 0x00, 0x00, /* 0, 0 */
LE32( 54 + 4*0 ), /* offset to bitmap */
0x28, 0x00, 0x00, 0x00, /* size of this struct (40) */
LE32( bm->width ), /* bmap width in pixels */
LE32( bm->height ), /* bmap height in pixels */
0x01, 0x00, /* num planes - always 1 */
LE16( 24 ), /* bits per pixel */
LE32( 0 ), /* compression flag */
LE32( bm->height*line_width ), /* image size in bytes */
0xc4, 0x0e, 0x00, 0x00, /* horz resolution */
0xc4, 0x0e, 0x00, 0x00, /* vert resolution */
LE32( 0 ), /* 0 -> color table size */
LE32( 0 ) /* important color count */
};
int fh;
int x,y;
if( bm->format != FORMAT_NATIVE ) return -1;
fh = rb->creat( filename );
if( fh < 0 ) return -1;
rb->write( fh, header, sizeof( header ) );
for( y = bm->height-1; y >= 0; y-- )
{
for( x = 0; x < bm->width; x++ )
{
fb_data *d = (fb_data*)( bm->data ) + (x+y*bm->width);
unsigned char c[] =
{
RGB_UNPACK_BLUE( *d ),
RGB_UNPACK_GREEN( *d ),
RGB_UNPACK_RED( *d )
};
rb->write( fh, c, 3 );
}
for( x = 0; x < 3*bm->width - line_width; x++ )
{
unsigned char c = 0;
rb->write( fh, &c, 1 );
}
}
rb->close( fh );
return 1;
}
#endif
/**
Very simple image scale from src to dst (nearest neighbour).
Source and destination dimensions are read from the struct bitmap.
*/
void simple_resize_bitmap(struct bitmap *src, struct bitmap *dst)
{
const int srcw = src->width;
const int srch = src->height;
const int dstw = dst->width;
const int dsth = dst->height;
const fb_data *srcd = (fb_data*)(src->data);
const fb_data *dstd = (fb_data*)(dst->data);
const long xrstep = ((srcw-1) << 8) / (dstw-1);
const long yrstep = ((srch-1) << 8) / (dsth-1);
fb_data *src_row, *dst_row;
long xr, yr = 0;
int src_x, src_y, dst_x, dst_y;
for (dst_y=0; dst_y < dsth; dst_y++)
{
src_y = (yr >> 8);
src_row = (fb_data*)&srcd[src_y * srcw];
dst_row = (fb_data*)&dstd[dst_y * dstw];
for (xr=0,dst_x=0; dst_x < dstw; dst_x++)
{
src_x = (xr >> 8);
dst_row[dst_x] = src_row[src_x];
xr += xrstep;
}
yr += yrstep;
}
}
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