You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
488 lines
12 KiB
488 lines
12 KiB
/* |
|
|
|
u8x8_8x8.c |
|
|
|
font procedures, directly interfaces display procedures |
|
|
|
Universal 8bit Graphics Library (https://github.com/olikraus/u8g2/) |
|
|
|
Copyright (c) 2016, olikraus@gmail.com |
|
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 "u8x8.h" |
|
|
|
#if defined(ESP8266) |
|
uint8_t u8x8_pgm_read_esp(const uint8_t * addr) |
|
{ |
|
uint32_t bytes; |
|
bytes = *(uint32_t*)((uint32_t)addr & ~3); |
|
return ((uint8_t*)&bytes)[(uint32_t)addr & 3]; |
|
} |
|
#endif |
|
|
|
|
|
void u8x8_SetFont(u8x8_t *u8x8, const uint8_t *font_8x8) |
|
{ |
|
u8x8->font = font_8x8; |
|
} |
|
|
|
/* |
|
Args: |
|
u8x8: ptr to u8x8 structure |
|
encoding: glyph for which the data is requested (must be between 0 and 255) |
|
buf: pointer to 8 bytes |
|
*/ |
|
static void u8x8_get_glyph_data(u8x8_t *u8x8, uint8_t encoding, uint8_t *buf, uint8_t tile_offset) U8X8_NOINLINE; |
|
static void u8x8_get_glyph_data(u8x8_t *u8x8, uint8_t encoding, uint8_t *buf, uint8_t tile_offset) |
|
{ |
|
uint8_t first, last, tiles, i; |
|
uint16_t offset; |
|
first = u8x8_pgm_read(u8x8->font+0); |
|
last = u8x8_pgm_read(u8x8->font+1); |
|
tiles = u8x8_pgm_read(u8x8->font+2); /* new 2019 format */ |
|
tiles *= u8x8_pgm_read(u8x8->font+3); /* new 2019 format */ |
|
|
|
/* get the glyph bitmap from the font */ |
|
if ( first <= encoding && encoding <= last ) |
|
{ |
|
offset = encoding; |
|
offset -= first; |
|
offset *= tiles; /* new 2019 format */ |
|
offset += tile_offset; /* new 2019 format */ |
|
offset *= 8; |
|
offset +=4; /* changed from 2 to 4, new 2019 format */ |
|
for( i = 0; i < 8; i++ ) |
|
{ |
|
buf[i] = u8x8_pgm_read(u8x8->font+offset); |
|
offset++; |
|
} |
|
} |
|
else |
|
{ |
|
for( i = 0; i < 8; i++ ) |
|
{ |
|
buf[i] = 0; |
|
} |
|
} |
|
|
|
/* invert the bitmap if required */ |
|
if ( u8x8->is_font_inverse_mode ) |
|
{ |
|
for( i = 0; i < 8; i++ ) |
|
{ |
|
buf[i] ^= 255; |
|
} |
|
} |
|
|
|
} |
|
|
|
void u8x8_DrawGlyph(u8x8_t *u8x8, uint8_t x, uint8_t y, uint8_t encoding) |
|
{ |
|
uint8_t th = u8x8_pgm_read(u8x8->font+2); /* new 2019 format */ |
|
uint8_t tv = u8x8_pgm_read(u8x8->font+3); /* new 2019 format */ |
|
uint8_t xx, tile; |
|
uint8_t buf[8]; |
|
th += x; |
|
tv += y; |
|
tile = 0; |
|
do |
|
{ |
|
xx = x; |
|
do |
|
{ |
|
u8x8_get_glyph_data(u8x8, encoding, buf, tile); |
|
u8x8_DrawTile(u8x8, xx, y, 1, buf); |
|
tile++; |
|
xx++; |
|
} while( xx < th ); |
|
y++; |
|
} while( y < tv ); |
|
} |
|
|
|
|
|
/* |
|
Source: http://graphics.stanford.edu/~seander/bithacks.html |
|
Section: Interleave bits by Binary Magic Numbers |
|
Original codes is here: |
|
static const unsigned int B[] = {0x55555555, 0x33333333, 0x0F0F0F0F, 0x00FF00FF}; |
|
static const unsigned int S[] = {1, 2, 4, 8}; |
|
|
|
unsigned int x; // Interleave lower 16 bits of x and y, so the bits of x |
|
unsigned int y; // are in the even positions and bits from y in the odd; |
|
unsigned int z; // z gets the resulting 32-bit Morton Number. |
|
// x and y must initially be less than 65536. |
|
|
|
x = (x | (x << S[3])) & B[3]; |
|
x = (x | (x << S[2])) & B[2]; |
|
x = (x | (x << S[1])) & B[1]; |
|
x = (x | (x << S[0])) & B[0]; |
|
|
|
y = (y | (y << S[3])) & B[3]; |
|
y = (y | (y << S[2])) & B[2]; |
|
y = (y | (y << S[1])) & B[1]; |
|
y = (y | (y << S[0])) & B[0]; |
|
|
|
z = x | (y << 1); |
|
*/ |
|
uint16_t u8x8_upscale_byte(uint8_t x) |
|
{ |
|
uint16_t y = x; |
|
y |= (y << 4); // x = (x | (x << S[2])) & B[2]; |
|
y &= 0x0f0f; |
|
y |= (y << 2); // x = (x | (x << S[1])) & B[1]; |
|
y &= 0x3333; |
|
y |= (y << 1); // x = (x | (x << S[0])) & B[0]; |
|
y &= 0x5555; |
|
|
|
y |= (y << 1); // z = x | (y << 1); |
|
return y; |
|
} |
|
|
|
static void u8x8_upscale_buf(uint8_t *src, uint8_t *dest) U8X8_NOINLINE; |
|
static void u8x8_upscale_buf(uint8_t *src, uint8_t *dest) |
|
{ |
|
uint8_t i = 4; |
|
do |
|
{ |
|
*dest++ = *src; |
|
*dest++ = *src++; |
|
i--; |
|
} while( i > 0 ); |
|
} |
|
|
|
static void u8x8_draw_2x2_subglyph(u8x8_t *u8x8, uint8_t x, uint8_t y, uint8_t encoding, uint8_t tile) |
|
{ |
|
uint8_t i; |
|
uint16_t t; |
|
uint8_t buf[8]; |
|
uint8_t buf1[8]; |
|
uint8_t buf2[8]; |
|
u8x8_get_glyph_data(u8x8, encoding, buf, tile); |
|
for( i = 0; i < 8; i ++ ) |
|
{ |
|
t = u8x8_upscale_byte(buf[i]); |
|
buf1[i] = t >> 8; |
|
buf2[i] = t & 255; |
|
} |
|
u8x8_upscale_buf(buf2, buf); |
|
u8x8_DrawTile(u8x8, x, y, 1, buf); |
|
|
|
u8x8_upscale_buf(buf2+4, buf); |
|
u8x8_DrawTile(u8x8, x+1, y, 1, buf); |
|
|
|
u8x8_upscale_buf(buf1, buf); |
|
u8x8_DrawTile(u8x8, x, y+1, 1, buf); |
|
|
|
u8x8_upscale_buf(buf1+4, buf); |
|
u8x8_DrawTile(u8x8, x+1, y+1, 1, buf); |
|
} |
|
|
|
|
|
void u8x8_Draw2x2Glyph(u8x8_t *u8x8, uint8_t x, uint8_t y, uint8_t encoding) |
|
{ |
|
uint8_t th = u8x8_pgm_read(u8x8->font+2); /* new 2019 format */ |
|
uint8_t tv = u8x8_pgm_read(u8x8->font+3); /* new 2019 format */ |
|
uint8_t xx, tile; |
|
th *= 2; |
|
th += x; |
|
tv *= 2; |
|
tv += y; |
|
tile = 0; |
|
do |
|
{ |
|
xx = x; |
|
do |
|
{ |
|
u8x8_draw_2x2_subglyph(u8x8, xx, y, encoding, tile); |
|
tile++; |
|
xx+=2; |
|
} while( xx < th ); |
|
y+=2; |
|
} while( y < tv ); |
|
} |
|
|
|
/* https://github.com/olikraus/u8g2/issues/474 */ |
|
static void u8x8_draw_1x2_subglyph(u8x8_t *u8x8, uint8_t x, uint8_t y, uint8_t encoding, uint8_t tile) |
|
{ |
|
uint8_t i; |
|
uint16_t t; |
|
uint8_t buf[8]; |
|
uint8_t buf1[8]; |
|
uint8_t buf2[8]; |
|
u8x8_get_glyph_data(u8x8, encoding, buf, tile); |
|
for( i = 0; i < 8; i ++ ) |
|
{ |
|
t = u8x8_upscale_byte(buf[i]); |
|
buf1[i] = t >> 8; |
|
buf2[i] = t & 255; |
|
} |
|
u8x8_DrawTile(u8x8, x, y, 1, buf2); |
|
u8x8_DrawTile(u8x8, x, y+1, 1, buf1); |
|
} |
|
|
|
void u8x8_Draw1x2Glyph(u8x8_t *u8x8, uint8_t x, uint8_t y, uint8_t encoding) |
|
{ |
|
uint8_t th = u8x8_pgm_read(u8x8->font+2); /* new 2019 format */ |
|
uint8_t tv = u8x8_pgm_read(u8x8->font+3); /* new 2019 format */ |
|
uint8_t xx, tile; |
|
th += x; |
|
tv *= 2; |
|
tv += y; |
|
tile = 0; |
|
do |
|
{ |
|
xx = x; |
|
do |
|
{ |
|
u8x8_draw_1x2_subglyph(u8x8, xx, y, encoding, tile); |
|
tile++; |
|
xx++; |
|
} while( xx < th ); |
|
y+=2; |
|
} while( y < tv ); |
|
} |
|
|
|
/* |
|
source: https://en.wikipedia.org/wiki/UTF-8 |
|
Bits from to bytes Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 Byte 6 |
|
7 U+0000 U+007F 1 0xxxxxxx |
|
11 U+0080 U+07FF 2 110xxxxx 10xxxxxx |
|
16 U+0800 U+FFFF 3 1110xxxx 10xxxxxx 10xxxxxx |
|
21 U+10000 U+1FFFFF 4 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx |
|
26 U+200000 U+3FFFFFF 5 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx |
|
31 U+4000000 U+7FFFFFFF 6 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx |
|
|
|
|
|
*/ |
|
|
|
/* reset the internal state machine */ |
|
void u8x8_utf8_init(u8x8_t *u8x8) |
|
{ |
|
u8x8->utf8_state = 0; /* also reset during u8x8_SetupDefaults() */ |
|
} |
|
|
|
uint16_t u8x8_ascii_next(U8X8_UNUSED u8x8_t *u8x8, uint8_t b) |
|
{ |
|
if ( b == 0 || b == '\n' ) /* '\n' terminates the string to support the string list procedures */ |
|
return 0x0ffff; /* end of string detected*/ |
|
return b; |
|
} |
|
|
|
/* |
|
pass a byte from an utf8 encoded string to the utf8 decoder state machine |
|
returns |
|
0x0fffe: no glyph, just continue |
|
0x0ffff: end of string |
|
anything else: The decoded encoding |
|
*/ |
|
uint16_t u8x8_utf8_next(u8x8_t *u8x8, uint8_t b) |
|
{ |
|
if ( b == 0 || b == '\n' ) /* '\n' terminates the string to support the string list procedures */ |
|
return 0x0ffff; /* end of string detected, pending UTF8 is discarded */ |
|
if ( u8x8->utf8_state == 0 ) |
|
{ |
|
if ( b >= 0xfc ) /* 6 byte sequence */ |
|
{ |
|
u8x8->utf8_state = 5; |
|
b &= 1; |
|
} |
|
else if ( b >= 0xf8 ) |
|
{ |
|
u8x8->utf8_state = 4; |
|
b &= 3; |
|
} |
|
else if ( b >= 0xf0 ) |
|
{ |
|
u8x8->utf8_state = 3; |
|
b &= 7; |
|
} |
|
else if ( b >= 0xe0 ) |
|
{ |
|
u8x8->utf8_state = 2; |
|
b &= 15; |
|
} |
|
else if ( b >= 0xc0 ) |
|
{ |
|
u8x8->utf8_state = 1; |
|
b &= 0x01f; |
|
} |
|
else |
|
{ |
|
/* do nothing, just use the value as encoding */ |
|
return b; |
|
} |
|
u8x8->encoding = b; |
|
return 0x0fffe; |
|
} |
|
else |
|
{ |
|
u8x8->utf8_state--; |
|
/* The case b < 0x080 (an illegal UTF8 encoding) is not checked here. */ |
|
u8x8->encoding<<=6; |
|
b &= 0x03f; |
|
u8x8->encoding |= b; |
|
if ( u8x8->utf8_state != 0 ) |
|
return 0x0fffe; /* nothing to do yet */ |
|
} |
|
return u8x8->encoding; |
|
} |
|
|
|
|
|
|
|
static uint8_t u8x8_draw_string(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) U8X8_NOINLINE; |
|
static uint8_t u8x8_draw_string(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) |
|
{ |
|
uint16_t e; |
|
uint8_t cnt = 0; |
|
uint8_t th = u8x8_pgm_read(u8x8->font+2); /* new 2019 format */ |
|
|
|
u8x8_utf8_init(u8x8); |
|
for(;;) |
|
{ |
|
e = u8x8->next_cb(u8x8, (uint8_t)*s); |
|
if ( e == 0x0ffff ) |
|
break; |
|
s++; |
|
if ( e != 0x0fffe ) |
|
{ |
|
u8x8_DrawGlyph(u8x8, x, y, e); |
|
x+=th; |
|
cnt++; |
|
} |
|
} |
|
return cnt; |
|
} |
|
|
|
|
|
uint8_t u8x8_DrawString(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) |
|
{ |
|
u8x8->next_cb = u8x8_ascii_next; |
|
return u8x8_draw_string(u8x8, x, y, s); |
|
} |
|
|
|
uint8_t u8x8_DrawUTF8(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) |
|
{ |
|
u8x8->next_cb = u8x8_utf8_next; |
|
return u8x8_draw_string(u8x8, x, y, s); |
|
} |
|
|
|
|
|
|
|
static uint8_t u8x8_draw_2x2_string(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) U8X8_NOINLINE; |
|
static uint8_t u8x8_draw_2x2_string(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) |
|
{ |
|
uint16_t e; |
|
uint8_t cnt = 0; |
|
u8x8_utf8_init(u8x8); |
|
for(;;) |
|
{ |
|
e = u8x8->next_cb(u8x8, (uint8_t)*s); |
|
if ( e == 0x0ffff ) |
|
break; |
|
s++; |
|
if ( e != 0x0fffe ) |
|
{ |
|
u8x8_Draw2x2Glyph(u8x8, x, y, e); |
|
x+=2; |
|
cnt++; |
|
} |
|
} |
|
return cnt; |
|
} |
|
|
|
|
|
uint8_t u8x8_Draw2x2String(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) |
|
{ |
|
u8x8->next_cb = u8x8_ascii_next; |
|
return u8x8_draw_2x2_string(u8x8, x, y, s); |
|
} |
|
|
|
uint8_t u8x8_Draw2x2UTF8(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) |
|
{ |
|
u8x8->next_cb = u8x8_utf8_next; |
|
return u8x8_draw_2x2_string(u8x8, x, y, s); |
|
} |
|
|
|
|
|
|
|
static uint8_t u8x8_draw_1x2_string(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) U8X8_NOINLINE; |
|
static uint8_t u8x8_draw_1x2_string(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) |
|
{ |
|
uint16_t e; |
|
uint8_t cnt = 0; |
|
u8x8_utf8_init(u8x8); |
|
for(;;) |
|
{ |
|
e = u8x8->next_cb(u8x8, (uint8_t)*s); |
|
if ( e == 0x0ffff ) |
|
break; |
|
s++; |
|
if ( e != 0x0fffe ) |
|
{ |
|
u8x8_Draw1x2Glyph(u8x8, x, y, e); |
|
x++; |
|
cnt++; |
|
} |
|
} |
|
return cnt; |
|
} |
|
|
|
|
|
uint8_t u8x8_Draw1x2String(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) |
|
{ |
|
u8x8->next_cb = u8x8_ascii_next; |
|
return u8x8_draw_1x2_string(u8x8, x, y, s); |
|
} |
|
|
|
uint8_t u8x8_Draw1x2UTF8(u8x8_t *u8x8, uint8_t x, uint8_t y, const char *s) |
|
{ |
|
u8x8->next_cb = u8x8_utf8_next; |
|
return u8x8_draw_1x2_string(u8x8, x, y, s); |
|
} |
|
|
|
|
|
|
|
uint8_t u8x8_GetUTF8Len(u8x8_t *u8x8, const char *s) |
|
{ |
|
uint16_t e; |
|
uint8_t cnt = 0; |
|
u8x8_utf8_init(u8x8); |
|
for(;;) |
|
{ |
|
e = u8x8_utf8_next(u8x8, *s); |
|
if ( e == 0x0ffff ) |
|
break; |
|
s++; |
|
if ( e != 0x0fffe ) |
|
cnt++; |
|
} |
|
return cnt; |
|
} |
|
|
|
|
|
|