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u8g_font.c
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/*
u8g_font.c
U8G Font High Level Interface
Universal 8bit Graphics Library
Copyright (c) 2011, [email protected]
All rights reserved.
Redistribution and use in source and binary forms, with or without modification,
are permitted provided that the following conditions are met:
* Redistributions of source code must retain the above copyright notice, this list
of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above copyright notice, this
list of conditions and the following disclaimer in the documentation and/or other
materials provided with the distribution.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "u8g.h"
/* font api */
/* pointer to the start adress of the glyph, points to progmem area */
typedef void * u8g_glyph_t;
/* size of the font data structure, there is no struct or class... */
#define U8G_FONT_DATA_STRUCT_SIZE 17
/*
... instead the fields of the font data structure are accessed directly by offset
font information
offset
0 font format
1 FONTBOUNDINGBOX width unsigned
2 FONTBOUNDINGBOX height unsigned
3 FONTBOUNDINGBOX x-offset signed
4 FONTBOUNDINGBOX y-offset signed
5 capital A height unsigned
6 start 'A'
8 start 'a'
10 encoding start
11 encoding end
12 descent 'g' negative: below baseline
13 font max ascent
14 font min decent negative: below baseline
15 font xascent
16 font xdecent negative: below baseline
*/
/* use case: What is the width and the height of the minimal box into which string s fints? */
void u8g_font_GetStrSize(const void *font, const char *s, u8g_uint_t *width, u8g_uint_t *height);
void u8g_font_GetStrSizeP(const void *font, const char *s, u8g_uint_t *width, u8g_uint_t *height);
/* use case: lower left edge of a minimal box is known, what is the correct x, y position for the string draw procedure */
void u8g_font_AdjustXYToDraw(const void *font, const char *s, u8g_uint_t *x, u8g_uint_t *y);
void u8g_font_AdjustXYToDrawP(const void *font, const char *s, u8g_uint_t *x, u8g_uint_t *y);
/* use case: Baseline origin known, return minimal box */
void u8g_font_GetStrMinBox(u8g_t *u8g, const void *font, const char *s, u8g_uint_t *x, u8g_uint_t *y, u8g_uint_t *width, u8g_uint_t *height);
/* procedures */
/*========================================================================*/
/* low level byte and word access */
/* removed NOINLINE, because it leads to smaller code, might also be faster */
//static uint8_t u8g_font_get_byte(const u8g_fntpgm_uint8_t *font, uint8_t offset) U8G_NOINLINE;
static uint8_t u8g_font_get_byte(const u8g_fntpgm_uint8_t *font, uint8_t offset)
{
font += offset;
return u8g_pgm_read( (u8g_pgm_uint8_t *)font );
}
static uint16_t u8g_font_get_word(const u8g_fntpgm_uint8_t *font, uint8_t offset) U8G_NOINLINE;
static uint16_t u8g_font_get_word(const u8g_fntpgm_uint8_t *font, uint8_t offset)
{
uint16_t pos;
font += offset;
pos = u8g_pgm_read( (u8g_pgm_uint8_t *)font );
font++;
pos <<= 8;
pos += u8g_pgm_read( (u8g_pgm_uint8_t *)font);
return pos;
}
/*========================================================================*/
/* direct access on the font */
static uint8_t u8g_font_GetFormat(const u8g_fntpgm_uint8_t *font) U8G_NOINLINE;
static uint8_t u8g_font_GetFormat(const u8g_fntpgm_uint8_t *font)
{
return u8g_font_get_byte(font, 0);
}
static uint8_t u8g_font_GetFontGlyphStructureSize(const u8g_fntpgm_uint8_t *font) U8G_NOINLINE;
static uint8_t u8g_font_GetFontGlyphStructureSize(const u8g_fntpgm_uint8_t *font)
{
switch(u8g_font_GetFormat(font))
{
case 0: return 6;
case 1: return 3;
case 2: return 6;
}
return 3;
}
static uint8_t u8g_font_GetBBXWidth(const void *font)
{
return u8g_font_get_byte(font, 1);
}
static uint8_t u8g_font_GetBBXHeight(const void *font)
{
return u8g_font_get_byte(font, 2);
}
static int8_t u8g_font_GetBBXOffX(const void *font)
{
return u8g_font_get_byte(font, 3);
}
static int8_t u8g_font_GetBBXOffY(const void *font)
{
return u8g_font_get_byte(font, 4);
}
uint8_t u8g_font_GetCapitalAHeight(const void *font)
{
return u8g_font_get_byte(font, 5);
}
uint16_t u8g_font_GetEncoding65Pos(const void *font) U8G_NOINLINE;
uint16_t u8g_font_GetEncoding65Pos(const void *font)
{
return u8g_font_get_word(font, 6);
}
uint16_t u8g_font_GetEncoding97Pos(const void *font) U8G_NOINLINE;
uint16_t u8g_font_GetEncoding97Pos(const void *font)
{
return u8g_font_get_word(font, 8);
}
uint8_t u8g_font_GetFontStartEncoding(const void *font)
{
return u8g_font_get_byte(font, 10);
}
uint8_t u8g_font_GetFontEndEncoding(const void *font)
{
return u8g_font_get_byte(font, 11);
}
int8_t u8g_font_GetLowerGDescent(const void *font)
{
return u8g_font_get_byte(font, 12);
}
int8_t u8g_font_GetFontAscent(const void *font)
{
return u8g_font_get_byte(font, 13);
}
int8_t u8g_font_GetFontDescent(const void *font)
{
return u8g_font_get_byte(font, 14);
}
int8_t u8g_font_GetFontXAscent(const void *font)
{
return u8g_font_get_byte(font, 15);
}
int8_t u8g_font_GetFontXDescent(const void *font)
{
return u8g_font_get_byte(font, 16);
}
/* return the data start for a font and the glyph pointer */
static uint8_t *u8g_font_GetGlyphDataStart(const void *font, u8g_glyph_t g)
{
return ((u8g_fntpgm_uint8_t *)g) + u8g_font_GetFontGlyphStructureSize(font);
}
/* calculate the overall length of the font, only used to create the picture for the google wiki */
size_t u8g_font_GetSize(const void *font)
{
uint8_t *p = (uint8_t *)(font);
uint8_t font_format = u8g_font_GetFormat(font);
uint8_t data_structure_size = u8g_font_GetFontGlyphStructureSize(font);
uint8_t start, end;
uint8_t i;
uint8_t mask = 255;
start = u8g_font_GetFontStartEncoding(font);
end = u8g_font_GetFontEndEncoding(font);
if ( font_format == 1 )
mask = 15;
p += U8G_FONT_DATA_STRUCT_SIZE; /* skip font general information */
i = start;
for(;;)
{
if ( u8g_pgm_read((u8g_pgm_uint8_t *)(p)) == 255 )
{
p += 1;
}
else
{
p += u8g_pgm_read( ((u8g_pgm_uint8_t *)(p)) + 2 ) & mask;
p += data_structure_size;
}
if ( i == end )
break;
i++;
}
return p - (uint8_t *)font;
}
/*========================================================================*/
/* u8g interface, font access */
uint8_t u8g_GetFontBBXWidth(u8g_t *u8g)
{
return u8g_font_GetBBXWidth(u8g->font);
}
uint8_t u8g_GetFontBBXHeight(u8g_t *u8g)
{
return u8g_font_GetBBXHeight(u8g->font);
}
int8_t u8g_GetFontBBXOffX(u8g_t *u8g) U8G_NOINLINE;
int8_t u8g_GetFontBBXOffX(u8g_t *u8g)
{
return u8g_font_GetBBXOffX(u8g->font);
}
int8_t u8g_GetFontBBXOffY(u8g_t *u8g) U8G_NOINLINE;
int8_t u8g_GetFontBBXOffY(u8g_t *u8g)
{
return u8g_font_GetBBXOffY(u8g->font);
}
uint8_t u8g_GetFontCapitalAHeight(u8g_t *u8g) U8G_NOINLINE;
uint8_t u8g_GetFontCapitalAHeight(u8g_t *u8g)
{
return u8g_font_GetCapitalAHeight(u8g->font);
}
/*========================================================================*/
/* glyph handling */
static void u8g_CopyGlyphDataToCache(u8g_t *u8g, u8g_glyph_t g)
{
uint8_t tmp;
switch( u8g_font_GetFormat(u8g->font) )
{
case 0:
case 2:
/*
format 0
glyph information
offset
0 BBX width unsigned
1 BBX height unsigned
2 data size unsigned (BBX width + 7)/8 * BBX height
3 DWIDTH signed
4 BBX xoffset signed
5 BBX yoffset signed
byte 0 == 255 indicates empty glyph
*/
u8g->glyph_width = u8g_pgm_read( ((u8g_pgm_uint8_t *)g) + 0 );
u8g->glyph_height = u8g_pgm_read( ((u8g_pgm_uint8_t *)g) + 1 );
u8g->glyph_dx = u8g_pgm_read( ((u8g_pgm_uint8_t *)g) + 3 );
u8g->glyph_x = u8g_pgm_read( ((u8g_pgm_uint8_t *)g) + 4 );
u8g->glyph_y = u8g_pgm_read( ((u8g_pgm_uint8_t *)g) + 5 );
break;
case 1:
default:
/*
format 1
0 BBX xoffset signed --> upper 4 Bit
0 BBX yoffset signed --> lower 4 Bit
1 BBX width unsigned --> upper 4 Bit
1 BBX height unsigned --> lower 4 Bit
2 data size unsigned -(BBX width + 7)/8 * BBX height --> lower 4 Bit
2 DWIDTH signed --> upper 4 Bit
byte 0 == 255 indicates empty glyph
*/
tmp = u8g_pgm_read( ((u8g_pgm_uint8_t *)g) + 0 );
u8g->glyph_y = tmp & 15;
u8g->glyph_y-=2;
tmp >>= 4;
u8g->glyph_x = tmp;
tmp = u8g_pgm_read( ((u8g_pgm_uint8_t *)g) + 1 );
u8g->glyph_height = tmp & 15;
tmp >>= 4;
u8g->glyph_width = tmp;
tmp = u8g_pgm_read( ((u8g_pgm_uint8_t *)g) + 2 );
tmp >>= 4;
u8g->glyph_dx = tmp;
break;
}
}
//void u8g_FillEmptyGlyphCache(u8g_t *u8g) U8G_NOINLINE;
static void u8g_FillEmptyGlyphCache(u8g_t *u8g)
{
u8g->glyph_dx = 0;
u8g->glyph_width = 0;
u8g->glyph_height = 0;
u8g->glyph_x = 0;
u8g->glyph_y = 0;
}
/*
Find (with some speed optimization) and return a pointer to the glyph data structure
Also uncompress (format 1) and copy the content of the data structure to the u8g structure
*/
u8g_glyph_t u8g_GetGlyph(u8g_t *u8g, uint8_t requested_encoding)
{
uint8_t *p = (uint8_t *)(u8g->font);
uint8_t font_format = u8g_font_GetFormat(u8g->font);
uint8_t data_structure_size = u8g_font_GetFontGlyphStructureSize(u8g->font);
uint8_t start, end;
uint16_t pos;
uint8_t i;
uint8_t mask = 255;
if ( font_format == 1 )
mask = 15;
start = u8g_font_GetFontStartEncoding(u8g->font);
end = u8g_font_GetFontEndEncoding(u8g->font);
pos = u8g_font_GetEncoding97Pos(u8g->font);
if ( requested_encoding >= 97 && pos > 0 )
{
p+= pos;
start = 97;
}
else
{
pos = u8g_font_GetEncoding65Pos(u8g->font);
if ( requested_encoding >= 65 && pos > 0 )
{
p+= pos;
start = 65;
}
else
p += U8G_FONT_DATA_STRUCT_SIZE; /* skip font general information */
}
if ( requested_encoding > end )
{
u8g_FillEmptyGlyphCache(u8g);
return NULL; /* not found */
}
i = start;
if ( i <= end )
{
for(;;)
{
if ( u8g_pgm_read((u8g_pgm_uint8_t *)(p)) == 255 )
{
p += 1;
}
else
{
if ( i == requested_encoding )
{
u8g_CopyGlyphDataToCache(u8g, p);
return p;
}
p += u8g_pgm_read( ((u8g_pgm_uint8_t *)(p)) + 2 ) & mask;
p += data_structure_size;
}
if ( i == end )
break;
i++;
}
}
u8g_FillEmptyGlyphCache(u8g);
return NULL;
}
uint8_t u8g_IsGlyph(u8g_t *u8g, uint8_t requested_encoding)
{
if ( u8g_GetGlyph(u8g, requested_encoding) != NULL )
return 1;
return 0;
}
int8_t u8g_GetGlyphDeltaX(u8g_t *u8g, uint8_t requested_encoding)
{
if ( u8g_GetGlyph(u8g, requested_encoding) == NULL )
return 0; /* should never happen, so return something */
return u8g->glyph_dx;
}
/*========================================================================*/
/* glyph drawing procedures */
#ifdef OBSOLETE
/*
Draw a glyph
x,y: left baseline position of the glyph
*/
int8_t u8g_DrawGlyphDir(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t dir, uint8_t encoding)
{
u8g_glyph_t g;
uint8_t w, h, i, j;
const u8g_pgm_uint8_t *data;
uint8_t bytes_per_line;
u8g_uint_t ix, iy;
g = u8g_GetGlyph(u8g, encoding);
if ( g == NULL )
return 0;
w = u8g->glyph_width;
h = u8g->glyph_height;
bytes_per_line = w;
bytes_per_line += 7;
bytes_per_line /= 8;
data = u8g_font_GetGlyphDataStart(u8g->font, g);
switch(dir)
{
case 0:
x += u8g->glyph_x;
y -= u8g->glyph_y;
y--;
//u8g_DrawFrame(u8g, x, y-h+1, w, h);
if ( u8g_IsBBXIntersection(u8g, x, y-h+1, w, h) == 0 )
return u8g->glyph_dx;
iy = y;
iy -= h;
iy++;
for( j = 0; j < h; j++ )
{
ix = x;
for( i = 0; i < bytes_per_line; i++ )
{
u8g_Draw8Pixel(u8g, ix, iy, dir, u8g_pgm_read(data));
data++;
ix+=8;
}
iy++;
}
break;
case 1:
x += u8g->glyph_y;
x++;
y += u8g->glyph_x;
//printf("enc %d, dir %d, x %d, y %d, w %d, h %d\n", encoding, dir, x, y, w, h);
//u8g_DrawFrame(u8g, x, y, h, w);
if ( u8g_IsBBXIntersection(u8g, x, y, h, w) == 0 )
return u8g->glyph_dx;
ix = x;
ix += h;
ix--;
for( j = 0; j < h; j++ )
{
iy = y;
for( i = 0; i < bytes_per_line; i++ )
{
u8g_Draw8Pixel(u8g, ix, iy, dir, u8g_pgm_read(data));
data++;
iy+=8;
}
ix--;
}
break;
case 2:
x -= u8g->glyph_x;
y += u8g->glyph_y;
y++;
if ( u8g_IsBBXIntersection(u8g, x-w-1, y, w, h) == 0 )
return u8g->glyph_dx;
iy = y;
iy += h;
iy--;
for( j = 0; j < h; j++ )
{
ix = x;
for( i = 0; i < bytes_per_line; i++ )
{
u8g_Draw8Pixel(u8g, ix, iy, dir, u8g_pgm_read(data));
data++;
ix-=8;
}
iy--;
}
break;
case 3:
x -= u8g->glyph_y;
x--;
y -= u8g->glyph_x;
if ( u8g_IsBBXIntersection(u8g, x-h-1, y-w-1, h, w) == 0 )
return u8g->glyph_dx;
ix = x;
ix -= h;
ix++;
for( j = 0; j < h; j++ )
{
iy = y;
for( i = 0; i < bytes_per_line; i++ )
{
u8g_Draw8Pixel(u8g, ix, iy, dir, u8g_pgm_read(data));
data++;
iy-=8;
}
ix++;
}
break;
}
return u8g->glyph_dx;
}
#endif
int8_t u8g_draw_glyph(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t encoding)
{
const u8g_pgm_uint8_t *data;
uint8_t w, h;
uint8_t i, j;
u8g_uint_t ix, iy;
{
u8g_glyph_t g = u8g_GetGlyph(u8g, encoding);
if ( g == NULL )
return 0;
data = u8g_font_GetGlyphDataStart(u8g->font, g);
}
w = u8g->glyph_width;
h = u8g->glyph_height;
x += u8g->glyph_x;
y -= u8g->glyph_y;
y--;
if ( u8g_IsBBXIntersection(u8g, x, y-h+1, w, h) == 0 )
return u8g->glyph_dx;
/* now, w is reused as bytes per line */
w += 7;
w /= 8;
iy = y;
iy -= h;
iy++;
for( j = 0; j < h; j++ )
{
ix = x;
for( i = 0; i < w; i++ )
{
u8g_Draw8Pixel(u8g, ix, iy, 0, u8g_pgm_read(data));
data++;
ix+=8;
}
iy++;
}
return u8g->glyph_dx;
}
int8_t u8g_DrawGlyph(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t encoding)
{
y += u8g->font_calc_vref(u8g);
return u8g_draw_glyph(u8g, x, y, encoding);
}
int8_t u8g_draw_glyph90(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t encoding)
{
const u8g_pgm_uint8_t *data;
uint8_t w, h;
uint8_t i, j;
u8g_uint_t ix, iy;
{
u8g_glyph_t g = u8g_GetGlyph(u8g, encoding);
if ( g == NULL )
return 0;
data = u8g_font_GetGlyphDataStart(u8g->font, g);
}
w = u8g->glyph_width;
h = u8g->glyph_height;
x += u8g->glyph_y;
x++;
y += u8g->glyph_x;
if ( u8g_IsBBXIntersection(u8g, x, y, h, w) == 0 )
return u8g->glyph_dx;
/* now, w is reused as bytes per line */
w += 7;
w /= 8;
ix = x;
ix += h;
ix--;
for( j = 0; j < h; j++ )
{
iy = y;
for( i = 0; i < w; i++ )
{
u8g_Draw8Pixel(u8g, ix, iy, 1, u8g_pgm_read(data));
data++;
iy+=8;
}
ix--;
}
return u8g->glyph_dx;
}
int8_t u8g_DrawGlyph90(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t encoding)
{
x -= u8g->font_calc_vref(u8g);
return u8g_draw_glyph90(u8g, x, y, encoding);
}
int8_t u8g_draw_glyph180(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t encoding)
{
const u8g_pgm_uint8_t *data;
uint8_t w, h;
uint8_t i, j;
u8g_uint_t ix, iy;
{
u8g_glyph_t g = u8g_GetGlyph(u8g, encoding);
if ( g == NULL )
return 0;
data = u8g_font_GetGlyphDataStart(u8g->font, g);
}
w = u8g->glyph_width;
h = u8g->glyph_height;
x -= u8g->glyph_x;
y += u8g->glyph_y;
y++;
if ( u8g_IsBBXIntersection(u8g, x-(w-1), y, w, h) == 0 )
return u8g->glyph_dx;
/* now, w is reused as bytes per line */
w += 7;
w /= 8;
iy = y;
iy += h;
iy--;
for( j = 0; j < h; j++ )
{
ix = x;
for( i = 0; i < w; i++ )
{
u8g_Draw8Pixel(u8g, ix, iy, 2, u8g_pgm_read(data));
data++;
ix-=8;
}
iy--;
}
return u8g->glyph_dx;
}
int8_t u8g_DrawGlyph180(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t encoding)
{
y -= u8g->font_calc_vref(u8g);
return u8g_draw_glyph180(u8g, x, y, encoding);
}
int8_t u8g_draw_glyph270(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t encoding)
{
const u8g_pgm_uint8_t *data;
uint8_t w, h;
uint8_t i, j;
u8g_uint_t ix, iy;
{
u8g_glyph_t g = u8g_GetGlyph(u8g, encoding);
if ( g == NULL )
return 0;
data = u8g_font_GetGlyphDataStart(u8g->font, g);
}
w = u8g->glyph_width;
h = u8g->glyph_height;
x -= u8g->glyph_y;
x--;
y -= u8g->glyph_x;
if ( u8g_IsBBXIntersection(u8g, x-(h-1), y-(w-1), h, w) == 0 )
return u8g->glyph_dx;
/* now, w is reused as bytes per line */
w += 7;
w /= 8;
ix = x;
ix -= h;
ix++;
for( j = 0; j < h; j++ )
{
iy = y;
for( i = 0; i < w; i++ )
{
u8g_Draw8Pixel(u8g, ix, iy, 3, u8g_pgm_read(data));
data++;
iy-=8;
}
ix++;
}
return u8g->glyph_dx;
}
int8_t u8g_DrawGlyph270(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t encoding)
{
x += u8g->font_calc_vref(u8g);
return u8g_draw_glyph270(u8g, x, y, encoding);
}
#ifdef OBSOLETE
/*
Draw a glyph
x,y: lower left corner of the font bounding box
*/
int8_t u8g_DrawGlyphFontBBX(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t dir, uint8_t encoding)
{
/* TODO: apply "dir" */
x -= u8g_GetFontBBXOffX(u8g);
y += u8g_GetFontBBXOffY(u8g);
return u8g_DrawGlyphDir(u8g, x, y, dir, encoding);
}
#endif
/*========================================================================*/
/* string drawing procedures */
u8g_uint_t u8g_DrawStr(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, const char *s)
{
u8g_uint_t t = 0;
int8_t d;
//u8g_uint_t u8g_GetStrWidth(u8g, s);
//u8g_font_GetFontAscent(u8g->font)-u8g_font_GetFontDescent(u8g->font);
y += u8g->font_calc_vref(u8g);
while( *s != '\0' )
{
d = u8g_draw_glyph(u8g, x, y, *s);
x += d;
t += d;
s++;
}
return t;
}
u8g_uint_t u8g_DrawStr90(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, const char *s)
{
u8g_uint_t t = 0;
int8_t d;
x -= u8g->font_calc_vref(u8g);
while( *s != '\0' )
{
d = u8g_draw_glyph90(u8g, x, y, *s);
y += d;
t += d;
s++;
}
return t;
}
u8g_uint_t u8g_DrawStr180(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, const char *s)
{
u8g_uint_t t = 0;
int8_t d;
y -= u8g->font_calc_vref(u8g);
while( *s != '\0' )
{
d = u8g_draw_glyph180(u8g, x, y, *s);
x -= d;
t += d;
s++;
}
return t;
}
u8g_uint_t u8g_DrawStr270(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, const char *s)
{
u8g_uint_t t = 0;
int8_t d;
x += u8g->font_calc_vref(u8g);
while( *s != '\0' )
{
d = u8g_draw_glyph270(u8g, x, y, *s);
y -= d;
t += d;
s++;
}
return t;
}
u8g_uint_t u8g_DrawStrDir(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t dir, const char *s)
{
switch(dir)
{
case 0:
return u8g_DrawStr(u8g, x, y, s);
case 1:
return u8g_DrawStr90(u8g, x, y, s);
case 2:
return u8g_DrawStr180(u8g, x, y, s);
case 3:
return u8g_DrawStr270(u8g, x, y, s);
}
return 0;
}
u8g_uint_t u8g_DrawStrP(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, const u8g_pgm_uint8_t *s)
{
u8g_uint_t t = 0;
int8_t d;
uint8_t c;
y += u8g->font_calc_vref(u8g);
for(;;)
{
c = u8g_pgm_read(s);
if ( c == '\0' )
break;
d = u8g_draw_glyph(u8g, x, y, c);
x += d;
t += d;
s++;
}
return t;
}
u8g_uint_t u8g_DrawStr90P(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, const u8g_pgm_uint8_t *s)
{
u8g_uint_t t = 0;
int8_t d;
uint8_t c;
x -= u8g->font_calc_vref(u8g);
for(;;)
{
c = u8g_pgm_read(s);
if ( c == '\0' )
break;
d = u8g_DrawGlyph90(u8g, x, y, c);
y += d;
t += d;
s++;
}
return t;
}
u8g_uint_t u8g_DrawStr180P(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, const u8g_pgm_uint8_t *s)
{
u8g_uint_t t = 0;
int8_t d;
uint8_t c;
y -= u8g->font_calc_vref(u8g);
for(;;)
{
c = u8g_pgm_read(s);
if ( c == '\0' )
break;
d = u8g_DrawGlyph180(u8g, x, y, c);
x -= d;
t += d;
s++;
}
return t;
}
u8g_uint_t u8g_DrawStr270P(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, const u8g_pgm_uint8_t *s)
{
u8g_uint_t t = 0;
int8_t d;
uint8_t c;
x += u8g->font_calc_vref(u8g);
for(;;)
{
c = u8g_pgm_read(s);
if ( c == '\0' )
break;
d = u8g_DrawGlyph270(u8g, x, y, c);
y -= d;
t += d;
s++;
}
return t;
}
u8g_uint_t u8g_DrawStrFontBBX(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t dir, const char *s)
{
x -= u8g_GetFontBBXOffX(u8g);
y += u8g_GetFontBBXOffY(u8g);
return u8g_DrawStrDir(u8g, x, y, dir, s);
}
/* still used by picgen.c, dir argument is ignored */
int8_t u8g_DrawGlyphFontBBX(u8g_t *u8g, u8g_uint_t x, u8g_uint_t y, uint8_t dir, uint8_t encoding)
{
x -= u8g_GetFontBBXOffX(u8g);
y += u8g_GetFontBBXOffY(u8g);
u8g_draw_glyph(u8g, x, y, encoding);
return 0;
}
/*========================================================================*/
/* set ascent/descent for reference point calculation */
void u8g_UpdateRefHeight(u8g_t *u8g)
{
uint16_t ls;
if ( u8g->font == NULL )
return;
if ( u8g->font_height_mode == U8G_FONT_HEIGHT_MODE_TEXT )
{
u8g->font_ref_ascent = u8g_font_GetCapitalAHeight(u8g->font);
u8g->font_ref_descent = u8g_font_GetLowerGDescent(u8g->font);
}
else if ( u8g->font_height_mode == U8G_FONT_HEIGHT_MODE_XTEXT )
{
u8g->font_ref_ascent = u8g_font_GetFontXAscent(u8g->font);
u8g->font_ref_descent = u8g_font_GetFontXDescent(u8g->font);
}
else
{