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switch to bit-font for text

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master
Clyne 2 years ago
parent 7fbb94cb15
commit 824e603b23
3 changed files with 240 additions and 114 deletions
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141
source/bit-font2.c
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/*
Copyright 2022 Bga <bga.email@gmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Modified by tcsullivan:
- compacted code to only what is required
- changed ordering of font bitmap data for easier rendering
- added functional interface
*/
#include <stdint.h>
#define MAKE_GLYPH(hi, lo) (((hi * 3) << 8) | lo * 3)
const uint8_t halfGlyphData[] = {
0x00, 0x00, 0x00,
0x0C, 0x03, 0x00,
0x0C, 0xC3, 0x30,
0xF3, 0x3C, 0xCF,
0xFF, 0x3C, 0xCF,
0xF3, 0x3C, 0xFF,
0xFF, 0x3C, 0xFF,
0x3F, 0x0C, 0xFF,
0xFF, 0x30, 0xFC,
0xCF, 0x30, 0xFC,
0xC3, 0x30, 0xFC,
0x3F, 0x0C, 0xC3,
0xFF, 0x30, 0x0C,
0x0C, 0xC3, 0xFC,
0xFF, 0x3F, 0x87,
0xE1, 0xFC, 0xFF,
0xF3, 0xEC, 0x31,
0xCC, 0x3F, 0xCF,
0xF3, 0x6C, 0xF3,
0xBC, 0x3D, 0xCF,
0x37, 0x0C, 0xFF,
0xFE, 0x3C, 0xFB,
0x30, 0x0C, 0xC3,
0x30, 0x3C, 0xFF,
};
const uint16_t glyphData[] = {
/* d0 */ MAKE_GLYPH(5, 4),
/* d1 */ MAKE_GLYPH(2, 2),
/* d2 */ MAKE_GLYPH(8, 11),
/* d3 */ MAKE_GLYPH(9, 12),
/* d4 */ MAKE_GLYPH(4, 10),
/* d5 */ MAKE_GLYPH(7, 8),
/* d6 */ MAKE_GLYPH(7, 4),
/* d7 */ MAKE_GLYPH(9, 2),
/* d8 */ MAKE_GLYPH(6, 4),
/* d9 */ MAKE_GLYPH(6, 12),
/* space */ MAKE_GLYPH(0, 0),
/* dot */ MAKE_GLYPH(0, 1),
/* comma */ MAKE_GLYPH(0, 2),
/* colon */ MAKE_GLYPH(1, 1),
/* asterick */ MAKE_GLYPH(2, 1),
/* questionMark */ MAKE_GLYPH(9, 1),
/* quote */ MAKE_GLYPH(2, 0),
/* doubleQuote */ MAKE_GLYPH(3, 0),
/* lowTriangle */ MAKE_GLYPH(1, 4),
/* A */ MAKE_GLYPH(6, 3),
/* B */ MAKE_GLYPH(21, 21),
/* C */ MAKE_GLYPH(23, 4),
/* D */ MAKE_GLYPH(18, 19),
/* E */ MAKE_GLYPH(7, 7),
/* F */ MAKE_GLYPH(7, 22),
/* G */ MAKE_GLYPH(20, 4),
/* H */ MAKE_GLYPH(4, 3),
/* I */ MAKE_GLYPH(2, 2),
/* J */ MAKE_GLYPH(10, 4),
/* K */ MAKE_GLYPH(19, 18),
/* L */ MAKE_GLYPH(22, 11),
/* M */ MAKE_GLYPH(14, 3),
/* N */ MAKE_GLYPH(18, 3),
/* O */ MAKE_GLYPH(5, 4),
/* P */ MAKE_GLYPH(6, 22),
/* Q */ MAKE_GLYPH(5, 17),
/* R */ MAKE_GLYPH(6, 18),
/* S */ MAKE_GLYPH(7, 8),
/* T */ MAKE_GLYPH(13, 2),
/* U */ MAKE_GLYPH(3, 4),
/* V */ MAKE_GLYPH(3, 19),
/* W */ MAKE_GLYPH(3, 15),
/* X */ MAKE_GLYPH(17, 16),
/* Y */ MAKE_GLYPH(4, 2),
/* Z */ MAKE_GLYPH(9, 11),
/* caret */ MAKE_GLYPH(16, 0),
/* squareBracketOpen */ MAKE_GLYPH(23, 17),
/* squareBracketClose */ MAKE_GLYPH(10, 12)
};
const char glyphKeys[47] = {
'0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
' ',
'.',
',',
':',
'!',
'?',
'\'',
'"',
'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X', 'Y', 'Z',
'^',
'[',
']'
};
const uint8_t *bitfontGetBitmapLo(unsigned int gindex)
{
if (gindex < sizeof(glyphKeys))
return halfGlyphData + (glyphData[gindex] & 0x00FF);
else
return 0;
}
const uint8_t *bitfontGetBitmapHi(unsigned int gindex)
{
if (gindex < sizeof(glyphKeys))
return halfGlyphData + ((glyphData[gindex] >> 8) & 0xFF);
else
return 0;
}
unsigned int bitfontGetGlyph(char c)
{
for (unsigned int i = 0; i < sizeof(glyphKeys); ++i) {
if (glyphKeys[i] == c)
return i;
}
return 15; // Glyph for '?'
}

43
source/bit-font2.h
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/*
Copyright 2022 Bga <bga.email@gmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
Modified by tcsullivan:
- compacted code to only what is required
- changed ordering of font bitmap data for easier rendering
- added functional interface
*/
#ifndef BIT_FONT2_H
#define BIT_FONT2_H
#include <stdint.h>
/**
* Looks up the glyph number for the given character.
* Returns glyph for '?' if character is not supported.
*/
unsigned int bitfontGetGlyph(char c);
/**
* Returns bitmap for "hi" portion of given glyph.
* Returns NULL if glyph index is too large.
*/
const uint8_t *bitfontGetBitmapHi(unsigned int gindex);
/**
* Returns bitmap for "lo" portion of given glyph.
* Returns NULL if glyph index is too large.
*/
const uint8_t *bitfontGetBitmapLo(unsigned int gindex);
#endif // BIT_FONT2_H

170
source/dogs.c
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* See the GNU General Public License for more details.
*/
#include "bit-font2.h"
//#include "ch.h"
#include "dogs.h"
#include "hal.h"
@ -215,142 +216,83 @@ void draw_rect(int x, int y, int w, int h)
}
}
void draw_bitmap(int x, int y, const unsigned char *buffer)
void draw_bitmap_wh(int x, int y, int w, int h, const unsigned char *data)
{
// Prepare source information
const unsigned char *src = buffer;
const int width = *src++;
const int height = *src++;
int sbit = 0;
for (int j = 0; j < height; j++) {
for (int i = 0; i < width; i++) {
draw_pixel(x + i, y + j, *src & (1 << sbit));
for (int j = 0; j < h; j++) {
for (int i = 0; i < w; i++) {
draw_pixel(x + i, y + j, *data & (1 << sbit));
if (++sbit == 8) {
sbit = 0;
++src;
++data;
}
}
}
}
static const unsigned char draw_number_bitmaps[10][10] = {
{ 8, 8, // '0'
0b00011000,
0b00100100,
0b01000010,
0b01000010,
0b01000010,
0b01000010,
0b00100100,
0b00011000,
},
{ 8, 8, // '1'
0b01111100,
0b00010000,
0b00010000,
0b00010000,
0b00010000,
0b00010000,
0b00010100,
0b00011000,
},
{ 8, 8, // '2'
0b01111110,
0b00001000,
0b00010000,
0b00100000,
0b01000000,
0b01000010,
0b00100100,
0b00011000,
},
{ 8, 8, // '3'
0b00011100,
0b00100010,
0b01000000,
0b00100000,
0b00111100,
0b01000000,
0b00100010,
0b00011100,
},
{ 8, 8, // '4'
0b00100000,
0b00100000,
0b00100000,
0b00111110,
0b00100100,
0b00101000,
0b00110000,
0b00100000,
},
{ 8, 8, // '5'
0b00011100,
0b00100010,
0b01000000,
0b01000000,
0b00100000,
0b00011110,
0b00000010,
0b01111110,
},
{ 8, 8, // '6'
0b00011000,
0b00100100,
0b01000010,
0b01000110,
0b00111010,
0b00000010,
0b00000100,
0b00111000,
},
{ 8, 8, // '7'
0b00001000,
0b00001000,
0b00001000,
0b00001000,
0b00010000,
0b00100000,
0b01000000,
0b01111110,
},
{ 8, 8, // '8'
0b00011000,
0b00100100,
0b01000010,
0b00100100,
0b00111100,
0b01000010,
0b00100100,
0b00011000,
},
{ 8, 8, // '9'
0b00011100,
0b00100010,
0b01000000,
0b01111000,
0b01000100,
0b01000010,
0b00100100,
0b00011000,
},
};
void draw_bitmap(int x, int y, const unsigned char *buffer)
{
draw_bitmap_wh(x, y, buffer[0], buffer[1], buffer + 2);
}
void draw_glyph(int ix, int iy, unsigned int glyph)
{
const unsigned char *ptr;
int x, y, sbit, tbits;
x = ix + 5;
y = iy;
ptr = bitfontGetBitmapLo(glyph);
sbit = 0;
tbits = 18;
draw_glyph_loop:
for (int i = 0; i < tbits; ++i) {
draw_pixel(x, y, *ptr & (1 << sbit));
if (x == ix) {
x += 5;
++y;
} else {
--x;
}
if (sbit == 7) {
sbit = 0;
++ptr;
} else {
++sbit;
}
}
if (tbits == 18) {
ptr = bitfontGetBitmapHi(glyph);
sbit = 0;
tbits = 24;
goto draw_glyph_loop;
}
}
void draw_number(int x, int y, int number)
{
// TODO Handle negatives better?
if (number < 0)
number = -number;
// Count digits
int tmp = number;
int count;
for (count = 0; tmp; count++)
tmp /= 10;
if (count == 0)
count = 1;
x += count * 8;
// Draw digits
x += count * 7;
do {
x -= 8;
draw_bitmap(x, y, draw_number_bitmaps[number % 10]);
x -= 7;
draw_glyph(x, y, bitfontGetGlyph('0' + (number % 10)));
} while (number /= 10);
}

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