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sortix--sortix/kernel/vga.h
2015-09-25 14:59:04 +02:00

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/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2011, 2012, 2014.
This file is part of Sortix.
Sortix is free software: you can redistribute it and/or modify it under the
terms of the GNU General Public License as published by the Free Software
Foundation, either version 3 of the License, or (at your option) any later
version.
Sortix is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
details.
You should have received a copy of the GNU General Public License along with
Sortix. If not, see <http://www.gnu.org/licenses/>.
vga.h
A Video Graphics Array driver.
*******************************************************************************/
#ifndef SORTIX_VGA_H
#define SORTIX_VGA_H
#include <stddef.h>
#include <sortix/kernel/refcount.h>
namespace Sortix {
class Descriptor;
const size_t VGA_FONT_WIDTH = 8UL;
const size_t VGA_FONT_HEIGHT = 16UL;
const size_t VGA_FONT_NUMCHARS = 256UL;
const size_t VGA_FONT_CHARSIZE = VGA_FONT_WIDTH * VGA_FONT_HEIGHT / 8UL;
namespace VGA {
// https://en.wikipedia.org/wiki/Code_page_437
__attribute__((unused))
static inline int MapWideToVGAFont(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'': return 252;
case L'²': return 253;
case L'': return 254;
default: return 0 <= c && c < 256 ? c : -1;
}
}
__attribute__((unused))
static const uint8_t font_replacement_character[16] =
{
0b00000000,
0b00010000,
0b00111000,
0b01000100,
0b10111010,
0b10111010,
0b11110110,
0b11101110,
0b11101110,
0b11111110,
0b01101100,
0b00101000,
0b00010000,
0b00000000,
0b00000000,
0b00000000,
};
__attribute__((unused))
static inline const uint8_t* GetCharacterFont(const uint8_t* font, int remap)
{
if ( remap < 0 )
return font_replacement_character;
return font + 16 * remap;
}
void Init(const char* devpath, Ref<Descriptor> slashdev);
void SetCursor(unsigned x, unsigned y);
const uint8_t* GetFont();
} // namespace VGA
} // namespace Sortix
#endif