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trezor-firmware/core/embed/gfx/terminal.c
2024-11-18 09:41:02 +01:00

150 lines
3.9 KiB
C

/*
* This file is part of the Trezor project, https://trezor.io/
*
* Copyright (c) SatoshiLabs
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <trezor_model.h>
#include <trezor_rtl.h>
#include <gfx/fonts.h>
#include <gfx/gfx_draw.h>
#include <gfx/terminal.h>
#include <io/display.h>
#include <rtl/mini_printf.h>
#define TERMINAL_COLS (DISPLAY_RESX / 6)
#define TERMINAL_ROWS (DISPLAY_RESY / 8)
static char terminal_fb[TERMINAL_ROWS][TERMINAL_COLS];
static gfx_color_t terminal_fgcolor = COLOR_WHITE;
static gfx_color_t terminal_bgcolor = COLOR_BLACK;
// set colors for display_print function
void term_set_color(gfx_color_t fgcolor, gfx_color_t bgcolor) {
terminal_fgcolor = fgcolor;
terminal_bgcolor = bgcolor;
}
// Font_Bitmap contains 96 (0x20 - 0x7F) 5x7 glyphs
// Each glyph consists of 5 bytes (each byte represents one column)
//
// This function converts the glyph into the format compatible
// with `display_copy_mono1p()` functions.
static uint64_t term_glyph_bits(char ch) {
union {
uint64_t u64;
uint8_t bytes[8];
} result = {0};
if (ch > 32 && (uint8_t)ch < 128) {
const uint8_t *b = &Font_Bitmap[(ch - ' ') * 5];
for (int y = 0; y < 7; y++) {
uint8_t mask = 1 << y;
result.bytes[y] |= ((b[0] & mask) ? 128 : 0) + ((b[1] & mask) ? 64 : 0) +
((b[2] & mask) ? 32 : 0) + ((b[3] & mask) ? 16 : 0) +
((b[4] & mask) ? 8 : 0);
}
}
return result.u64;
}
// Redraws specified rows to the display
static void term_redraw_rows(int start_row, int row_count) {
uint64_t glyph_bits = 0;
gfx_bitblt_t bb = {
.height = 8,
.width = 6,
.dst_row = NULL,
.dst_x = 0,
.dst_y = 0,
.dst_stride = 0,
.src_row = &glyph_bits,
.src_x = 0,
.src_y = 0,
.src_stride = 8,
.src_fg = terminal_fgcolor,
.src_bg = terminal_bgcolor,
};
for (int y = start_row; y < start_row + row_count; y++) {
bb.dst_y = y * 8;
for (int x = 0; x < TERMINAL_COLS; x++) {
glyph_bits = term_glyph_bits(terminal_fb[y][x]);
bb.dst_x = x * 6;
display_copy_mono1p(&bb);
}
}
}
// display text using bitmap font
void term_print(const char *text, int textlen) {
static uint8_t row = 0, col = 0;
// determine text length if not provided
if (textlen < 0) {
textlen = strlen(text);
}
// print characters to internal buffer (terminal_fb)
for (int i = 0; i < textlen; i++) {
switch (text[i]) {
case '\r':
break;
case '\n':
row++;
col = 0;
break;
default:
terminal_fb[row][col] = text[i];
col++;
break;
}
if (col >= TERMINAL_COLS) {
col = 0;
row++;
}
if (row >= TERMINAL_ROWS) {
for (int j = 0; j < TERMINAL_ROWS - 1; j++) {
memcpy(terminal_fb[j], terminal_fb[j + 1], TERMINAL_COLS);
}
memset(terminal_fb[TERMINAL_ROWS - 1], 0, TERMINAL_COLS);
row = TERMINAL_ROWS - 1;
}
}
term_redraw_rows(0, TERMINAL_ROWS);
display_refresh();
}
// variadic term_print
void term_printf(const char *fmt, ...) {
if (!strchr(fmt, '%')) {
term_print(fmt, strlen(fmt));
} else {
va_list va;
va_start(va, fmt);
char buf[256] = {0};
int len = mini_vsnprintf(buf, sizeof(buf), fmt, va);
term_print(buf, len);
va_end(va);
}
}