344 lines
9.1 KiB
C
344 lines
9.1 KiB
C
|
/*
|
|||
|
|
* Copyright (c) 2014, 2015, 2016, 2017 Jonas 'Sortie' Termansen.
|
|||
|
|
*
|
|||
|
|
* Permission to use, copy, modify, and distribute this software for any
|
|||
|
|
* purpose with or without fee is hereby granted, provided that the above
|
|||
|
|
* copyright notice and this permission notice appear in all copies.
|
|||
|
|
*
|
|||
|
|
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
|||
|
|
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
|||
|
|
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
|||
|
|
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
|||
|
|
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
|||
|
|
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
|||
|
|
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
|||
|
|
*
|
|||
|
|
* vgafont.c
|
|||
|
|
* VGA font rendering.
|
|||
|
|
*/
|
|||
|
|
|
|||
|
|
#include <err.h>
|
|||
|
|
#include <fcntl.h>
|
|||
|
|
#include <ioleast.h>
|
|||
|
|
#include <stdbool.h>
|
|||
|
|
#include <stdint.h>
|
|||
|
|
#include <stdlib.h>
|
|||
|
|
#include <string.h>
|
|||
|
|
#include <unistd.h>
|
|||
|
|
#include <wchar.h>
|
|||
|
|
|
|||
|
|
#include "framebuffer.h"
|
|||
|
|
#include "vgafont.h"
|
|||
|
|
|
|||
|
|
static const wchar_t REPLACEMENT_CHARACTER = 0xFFFD;
|
|||
|
|
|
|||
|
|
uint8_t font[FONT_CHARSIZE * FONT_NUMCHARS];
|
|||
|
|
|
|||
|
|
void load_font(void)
|
|||
|
|
{
|
|||
|
|
int fd = open("/dev/vgafont", O_RDONLY);
|
|||
|
|
if ( fd < 0 )
|
|||
|
|
err(1, "/dev/vgafont");
|
|||
|
|
if ( readall(fd, font, sizeof(font)) != sizeof(font) )
|
|||
|
|
err(1, "/dev/vgafont");
|
|||
|
|
close(fd);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
// https://en.wikipedia.org/wiki/Code_page_437
|
|||
|
|
static inline int map_wide_to_vga_font(wchar_t c)
|
|||
|
|
{
|
|||
|
|
if ( 32 <= c && c < 127 )
|
|||
|
|
return (int) c;
|
|||
|
|
switch ( c )
|
|||
|
|
{
|
|||
|
|
case L'☺': return 1;
|
|||
|
|
case L'☻': return 2;
|
|||
|
|
case L'♥': return 3;
|
|||
|
|
case L'♦': return 4;
|
|||
|
|
case L'♣': return 5;
|
|||
|
|
case L'♠': return 6;
|
|||
|
|
case L'•': return 7;
|
|||
|
|
case L'◘': return 8;
|
|||
|
|
case L'○': return 9;
|
|||
|
|
case L'◙': return 10;
|
|||
|
|
case L'♂': return 11;
|
|||
|
|
case L'♀': return 12;
|
|||
|
|
case L'♪': return 13;
|
|||
|
|
case L'♬': return 14;
|
|||
|
|
case L'☼': return 15;
|
|||
|
|
case L'►': return 16;
|
|||
|
|
case L'◄': return 17;
|
|||
|
|
case L'↕': return 18;
|
|||
|
|
case L'‼': return 19;
|
|||
|
|
case L'¶': return 20;
|
|||
|
|
case L'§': return 21;
|
|||
|
|
case L'▬': return 22;
|
|||
|
|
case L'↨': return 23;
|
|||
|
|
case L'↑': return 24;
|
|||
|
|
case L'↓': return 25;
|
|||
|
|
case L'→': return 26;
|
|||
|
|
case L'←': return 27;
|
|||
|
|
case L'∟': return 28;
|
|||
|
|
case L'↔': return 29;
|
|||
|
|
case L'▲': return 30;
|
|||
|
|
case L'▼': return 31;
|
|||
|
|
case L'⌂': return 127;
|
|||
|
|
case L'Ç': return 128;
|
|||
|
|
case L'ü': return 129;
|
|||
|
|
case L'é': return 130;
|
|||
|
|
case L'â': return 131;
|
|||
|
|
case L'ä': return 132;
|
|||
|
|
case L'à': return 133;
|
|||
|
|
case L'å': return 134;
|
|||
|
|
case L'ç': return 135;
|
|||
|
|
case L'ê': return 136;
|
|||
|
|
case L'ë': return 137;
|
|||
|
|
case L'è': return 138;
|
|||
|
|
case L'ï': return 139;
|
|||
|
|
case L'î': return 140;
|
|||
|
|
case L'ì': return 141;
|
|||
|
|
case L'Ä': return 142;
|
|||
|
|
case L'Å': return 143;
|
|||
|
|
case L'É': return 144;
|
|||
|
|
case L'æ': return 145;
|
|||
|
|
case L'Æ': return 146;
|
|||
|
|
case L'ô': return 147;
|
|||
|
|
case L'ö': return 148;
|
|||
|
|
case L'ò': return 149;
|
|||
|
|
case L'û': return 150;
|
|||
|
|
case L'ù': return 151;
|
|||
|
|
case L'ÿ': return 152;
|
|||
|
|
case L'Ö': return 153;
|
|||
|
|
case L'Ü': return 154;
|
|||
|
|
case L'¢': return 155;
|
|||
|
|
case L'£': return 156;
|
|||
|
|
case L'¥': return 157;
|
|||
|
|
case L'₧': return 158;
|
|||
|
|
case L'ƒ': return 159;
|
|||
|
|
case L'á': return 160;
|
|||
|
|
case L'í': return 161;
|
|||
|
|
case L'ó': return 162;
|
|||
|
|
case L'ú': return 163;
|
|||
|
|
case L'ñ': return 164;
|
|||
|
|
case L'Ñ': return 165;
|
|||
|
|
case L'ª': return 166;
|
|||
|
|
case L'º': return 167;
|
|||
|
|
case L'¿': return 168;
|
|||
|
|
case L'⌐': return 169;
|
|||
|
|
case L'¬': return 170;
|
|||
|
|
case L'½': return 171;
|
|||
|
|
case L'¼': return 172;
|
|||
|
|
case L'¡': return 173;
|
|||
|
|
case L'«': return 174;
|
|||
|
|
case L'»': return 175;
|
|||
|
|
case L'░': return 176;
|
|||
|
|
case L'▒': return 177;
|
|||
|
|
case L'▓': return 178;
|
|||
|
|
case L'│': return 179;
|
|||
|
|
case L'┤': return 180;
|
|||
|
|
case L'╡': return 181;
|
|||
|
|
case L'╢': return 182;
|
|||
|
|
case L'╖': return 183;
|
|||
|
|
case L'╕': return 184;
|
|||
|
|
case L'╣': return 185;
|
|||
|
|
case L'║': return 186;
|
|||
|
|
case L'╗': return 187;
|
|||
|
|
case L'╝': return 188;
|
|||
|
|
case L'╜': return 189;
|
|||
|
|
case L'╛': return 190;
|
|||
|
|
case L'┐': return 191;
|
|||
|
|
case L'└': return 192;
|
|||
|
|
case L'┴': return 193;
|
|||
|
|
case L'┬': return 194;
|
|||
|
|
case L'├': return 195;
|
|||
|
|
case L'─': return 196;
|
|||
|
|
case L'┼': return 197;
|
|||
|
|
case L'╞': return 198;
|
|||
|
|
case L'╟': return 199;
|
|||
|
|
case L'╚': return 200;
|
|||
|
|
case L'╔': return 201;
|
|||
|
|
case L'╩': return 202;
|
|||
|
|
case L'╦': return 203;
|
|||
|
|
case L'╠': return 204;
|
|||
|
|
case L'═': return 205;
|
|||
|
|
case L'╬': return 206;
|
|||
|
|
case L'╧': return 207;
|
|||
|
|
case L'╨': return 208;
|
|||
|
|
case L'╤': return 209;
|
|||
|
|
case L'╥': return 210;
|
|||
|
|
case L'╙': return 211;
|
|||
|
|
case L'╘': return 212;
|
|||
|
|
case L'╒': return 213;
|
|||
|
|
case L'╓': return 214;
|
|||
|
|
case L'╫': return 215;
|
|||
|
|
case L'╪': return 216;
|
|||
|
|
case L'┘': return 217;
|
|||
|
|
case L'┌': return 218;
|
|||
|
|
case L'█': return 219;
|
|||
|
|
case L'▄': return 220;
|
|||
|
|
case L'▌': return 221;
|
|||
|
|
case L'▐': return 222;
|
|||
|
|
case L'▀': return 223;
|
|||
|
|
case L'α': return 224;
|
|||
|
|
case L'ß': return 225; /* German sharp S U+00DF */
|
|||
|
|
case L'β': return 225; /* Greek lowercase beta U+03B2 */
|
|||
|
|
case L'Γ': return 226;
|
|||
|
|
case L'π': return 227;
|
|||
|
|
case L'Σ': return 228; /* Greek uppercase sigma U+03A3 */
|
|||
|
|
case L'∑': return 228; /* n-ary summation sign U+2211 (replacement) */
|
|||
|
|
case L'σ': return 229;
|
|||
|
|
case L'µ': return 230;
|
|||
|
|
case L'τ': return 231;
|
|||
|
|
case L'Φ': return 232;
|
|||
|
|
case L'Θ': return 233;
|
|||
|
|
case L'Ω': return 234;
|
|||
|
|
case L'δ': return 235; /* Greek lowercase delta U+03B4 */
|
|||
|
|
case L'ð': return 235; /* Icelandic lowercase eth U+00F0 (replacement) */
|
|||
|
|
case L'∂': return 235; /* Partial derivative sign U+2202 (replacement) */
|
|||
|
|
case L'∞': return 236;
|
|||
|
|
case L'φ': return 237; /* Greek lowercase phi U+03C6 */
|
|||
|
|
case L'∅': return 237; /* Empty set sign U+2205 (replacement) */
|
|||
|
|
case L'ϕ': return 237; /* Greek phi symbol in italics U+03D5 (replacement) */
|
|||
|
|
case L'⌀': return 237; /* Diameter sign U+2300 (replacement) */
|
|||
|
|
case L'ø': return 237; /* Latin lowercase O with stroke U+00F8 (replacement) */
|
|||
|
|
case L'Ø': return 237; /* Latin uppercase O with stroke U+00D8 (replacement) */
|
|||
|
|
case L'ε': return 238; /* Greek lowercase epsilon U+03B5 */
|
|||
|
|
case L'∈': return 238; /* Element-of sign U+2208 */
|
|||
|
|
case L'€': return 238; /* Euro sign U+20AC */
|
|||
|
|
case L'∩': return 239;
|
|||
|
|
case L'≡': return 240;
|
|||
|
|
case L'±': return 241;
|
|||
|
|
case L'≥': return 242;
|
|||
|
|
case L'≤': return 243;
|
|||
|
|
case L'⌠': return 244;
|
|||
|
|
case L'⌡': return 245;
|
|||
|
|
case L'÷': return 246;
|
|||
|
|
case L'≈': return 247;
|
|||
|
|
case L'°': return 248;
|
|||
|
|
case L'∙': return 249;
|
|||
|
|
case L'·': return 250;
|
|||
|
|
case L'√': return 251;
|
|||
|
|
case L'ⁿ': return 252;
|
|||
|
|
case L'²': return 253;
|
|||
|
|
case L'■': return 254;
|
|||
|
|
default: return 0 <= c && c < 256 ? c : -1;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
static const uint8_t font_replacement_character[16] =
|
|||
|
|
{
|
|||
|
|
0b00000000,
|
|||
|
|
0b00010000,
|
|||
|
|
0b00111000,
|
|||
|
|
0b01000100,
|
|||
|
|
0b10111010,
|
|||
|
|
0b10111010,
|
|||
|
|
0b11110110,
|
|||
|
|
0b11101110,
|
|||
|
|
0b11101110,
|
|||
|
|
0b11111110,
|
|||
|
|
0b01101100,
|
|||
|
|
0b00101000,
|
|||
|
|
0b00010000,
|
|||
|
|
0b00000000,
|
|||
|
|
0b00000000,
|
|||
|
|
0b00000000,
|
|||
|
|
};
|
|||
|
|
|
|||
|
|
static inline const uint8_t* get_character_font(const uint8_t* font, int remap)
|
|||
|
|
{
|
|||
|
|
if ( remap < 0 )
|
|||
|
|
return font_replacement_character;
|
|||
|
|
return font + 16 * remap;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void render_char(struct framebuffer fb, wchar_t wc, uint32_t color)
|
|||
|
|
{
|
|||
|
|
// TODO: Special case the rendering of some block drawing characters like in
|
|||
|
|
// the kernel so pstree looks nice.
|
|||
|
|
int remap = map_wide_to_vga_font(wc);
|
|||
|
|
const uint8_t* charfont = get_character_font(font, remap);
|
|||
|
|
uint32_t buffer[FONT_HEIGHT * (FONT_REALWIDTH+1)];
|
|||
|
|
for ( size_t y = 0; y < FONT_HEIGHT; y++ )
|
|||
|
|
{
|
|||
|
|
uint8_t line_bitmap = charfont[y];
|
|||
|
|
for ( size_t x = 0; x < FONT_REALWIDTH; x++ )
|
|||
|
|
buffer[y * (FONT_REALWIDTH+1) + x] = line_bitmap & 1U << (7 - x) ? color : 0;
|
|||
|
|
uint32_t last_color = 0;
|
|||
|
|
if ( 0xB0 <= remap && remap <= 0xDF && (line_bitmap & 1) )
|
|||
|
|
last_color = color;
|
|||
|
|
buffer[y * (FONT_REALWIDTH+1) + 8] = last_color;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
struct framebuffer character_fb;
|
|||
|
|
character_fb.xres = FONT_WIDTH;
|
|||
|
|
character_fb.yres = FONT_HEIGHT;
|
|||
|
|
character_fb.pitch = character_fb.xres;
|
|||
|
|
character_fb.buffer = buffer;
|
|||
|
|
|
|||
|
|
framebuffer_copy_to_framebuffer_blend(fb, character_fb);
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
void render_text(struct framebuffer fb, const char* str, uint32_t color)
|
|||
|
|
{
|
|||
|
|
mbstate_t ps;
|
|||
|
|
memset(&ps, 0, sizeof(ps));
|
|||
|
|
size_t column = 0;
|
|||
|
|
for ( size_t i = 0; true; i++ )
|
|||
|
|
{
|
|||
|
|
wchar_t wc;
|
|||
|
|
size_t amount = mbrtowc(&wc, str + i, 1, &ps);
|
|||
|
|
if ( amount == (size_t) -2 )
|
|||
|
|
continue;
|
|||
|
|
if ( amount == (size_t) -1 )
|
|||
|
|
{
|
|||
|
|
wc = REPLACEMENT_CHARACTER;
|
|||
|
|
memset(&ps, 0, sizeof(ps));
|
|||
|
|
}
|
|||
|
|
if ( amount == (size_t) 0 )
|
|||
|
|
break;
|
|||
|
|
int width = wcwidth(wc);
|
|||
|
|
if ( 0 < width )
|
|||
|
|
{
|
|||
|
|
render_char(framebuffer_crop(fb, FONT_REALWIDTH * column, 0,
|
|||
|
|
fb.xres, fb.yres), wc, color);
|
|||
|
|
column += width; // TODO: Overflow.
|
|||
|
|
}
|
|||
|
|
if ( amount == (size_t) -1 && str[i] == '\0' )
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
size_t render_text_columns(const char* str)
|
|||
|
|
{
|
|||
|
|
mbstate_t ps;
|
|||
|
|
memset(&ps, 0, sizeof(ps));
|
|||
|
|
size_t column = 0;
|
|||
|
|
for ( size_t i = 0; true; i++ )
|
|||
|
|
{
|
|||
|
|
wchar_t wc;
|
|||
|
|
size_t amount = mbrtowc(&wc, str + i, 1, &ps);
|
|||
|
|
if ( amount == (size_t) -2 )
|
|||
|
|
continue;
|
|||
|
|
if ( amount == (size_t) -1 )
|
|||
|
|
{
|
|||
|
|
wc = REPLACEMENT_CHARACTER;
|
|||
|
|
memset(&ps, 0, sizeof(ps));
|
|||
|
|
}
|
|||
|
|
if ( amount == (size_t) 0 )
|
|||
|
|
break;
|
|||
|
|
int width = wcwidth(wc);
|
|||
|
|
if ( 0 < width )
|
|||
|
|
column += width; // TODO: Overflow.
|
|||
|
|
if ( amount == (size_t) -1 && str[i] == '\0' )
|
|||
|
|
break;
|
|||
|
|
}
|
|||
|
|
return column;
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
size_t render_text_width(const char* str)
|
|||
|
|
{
|
|||
|
|
// TODO: Overflow.
|
|||
|
|
return FONT_WIDTH * render_text_columns(str);
|
|||
|
|
}
|