flipper_cyrillic_example/font/bdfconv/bdf_8x8.c

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2023-05-02 21:01:20 +03:00
/*
bdf_8x8.c
unencoded font format for 8x8 pixel font
offset bytes desc
0 1 first char
1 1 last char
2 1 horizontal tile count (x), new 2019 format, issue 771
3 1 vertical tile count (y), new 2019 format, issue 771
4 n font data, n = (last char - first char + 1)*8
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include "bdf_font.h"
static int bg_8x8_convert(bg_t *bg, bbx_t *bbx, int xo, int yo)
{
int x;
int y;
int d;
if ( bbx == NULL )
bbx = &(bg->bbx);
/*
if ( bbx->w != 8 )
return 0;
if ( bbx->h != 8 )
return 0;
*/
/*
for( y = bbx->y+bbx->h-1; y >= bbx->y; y--)
{
d = 0;
for( x = bbx->x; x < bbx->x + bbx->w; x++)
{
d <<= 1;
if ( bg_GetBBXPixel(bg, x, y) != 0 )
{
d++;
}
}
if ( bg_AddTargetData(bg, d) < 0 )
return 0;
}
*/
for( x = bbx->x; x < bbx->x + bbx->w; x++)
{
d = 0;
for( y = bbx->y+bbx->h-1; y >= bbx->y; y--)
{
d >>= 1;
if ( bg_GetBBXPixel(bg, x+xo, y+yo) != 0 )
{
d |= 128;
}
}
if ( bg_AddTargetData(bg, d) < 0 )
return 0;
}
return 1;
}
void bf_Generate8x8Font(bf_t *bf, int xo, int yo)
{
int i, j, k;
bg_t *bg;
int first, last;
bbx_t local_bbx;
int is_glyph_written;
int x, y;
/* Step 1: Generate 8x8 bitmap data */
for( i = 0; i < bf->glyph_cnt; i++ )
{
bg = bf->glyph_list[i];
if ( bg->map_to >= 0 )
{
bf_copy_bbx_and_update_shift(bf, &local_bbx, bg);
if ( (local_bbx.w & 7) != 0 )
{
bf_Log(bf, "Generate8x8Font: Error, glyph width is not multiple of 8, width=%d, encoding=%d", local_bbx.w, bg->encoding);
}
else
{
if ( (local_bbx.h & 7) != 0 )
{
bf_Log(bf, "Generate8x8Font: Error, glyph height is not multiple of 8, height=%d, encoding=%d", local_bbx.h, bg->encoding);
}
else
{
bg_ClearTargetData(bg);
for( y = 0; y < bf->tile_v_size; y++ )
{
for( x = 0; x < bf->tile_h_size; x++ )
{
//bf_Log(bf, "Generate8x8Font: Encoding %d, x=%d, y=%d", bg->encoding, x, y);
if ( bg_8x8_convert(bg, &local_bbx, xo+8*x, yo+8*(bf->tile_v_size-y-1)) == 0 )
{
bf_Log(bf, "Generate8x8Font: Error, 8x8 conversion, encoding=%d", bg->target_cnt, bg->encoding);
}
}
}
}
}
}
}
/* Step 2: Calculate first and last char */
first = -1;
last = -1;
for( j = 0; j < 256; j++ )
{
for( i = 0; i < bf->glyph_cnt; i++ )
{
bg = bf->glyph_list[i];
if ( bg->map_to == j )
{
if ( bg->target_data != NULL )
{
//bf_Log(bf, "Generate8x8Font: Encoding %d, size=%d", bg->encoding, bg->target_cnt);
if ( bg->target_cnt != bf->tile_h_size*bf->tile_v_size*8)
{
bf_Log(bf, "Generate8x8Font: Error, glyph size incorrect, size=%d, encoding=%d", bg->target_cnt, bg->encoding);
}
else
{
if ( first < 0 )
first = j;
last = j;
}
}
}
}
}
/* Step 3: Write font data */
bf_AddTargetData(bf, first);
bf_AddTargetData(bf, last);
bf_AddTargetData(bf, bf->tile_h_size);
bf_AddTargetData(bf, bf->tile_v_size);
bf_Log(bf, "Generate8x8Font: Tile size width=%d height=%d", bf->tile_h_size, bf->tile_v_size);
for( j = first; j <= last; j++ )
{
is_glyph_written = 0;
for( i = 0; i < bf->glyph_cnt; i++ )
{
bg = bf->glyph_list[i];
if ( bg->map_to == j )
{
if ( bg->target_data != NULL )
{
if ( bg->target_cnt == bf->tile_h_size*bf->tile_v_size*8)
{
for( k = 0; k < bg->target_cnt; k++ )
{
bf_AddTargetData(bf, bg->target_data[k]);
}
is_glyph_written = 1;
}
}
}
}
if ( is_glyph_written == 0 )
{
for( k = 0; k < bf->tile_h_size*bf->tile_v_size*8; k++ )
{
bf_AddTargetData(bf, 0);
}
}
}
bf_Log(bf, "Generate8x8Font: Font size %d", bf->target_cnt);
}