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[Teton] Print out every character into the framebuffer as a test.

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This commit is contained in:
Drew Galbraith 2023-11-22 08:56:26 -08:00
parent afdb024c36
commit 2df1f6c006
3 changed files with 25 additions and 3 deletions
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20
sys/teton/framebuffer/console.cpp
View file

@ -1,15 +1,25 @@
#include "framebuffer/console.h"
#include <mammoth/debug.h>
void Console::WriteChar(char c) {
if (c == '\n') {
CursorReturn();
return;
}
uint64_t row = cursor_pos_ / cols();
if (row >= rows()) {
crash("Unimplemented console scroll.", glcr::UNIMPLEMENTED);
}
uint64_t fb_row = row * (psf_.height() + 1);
uint64_t col = cursor_pos_ % cols();
uint64_t fb_col = col * (psf_.width() + 1);
uint8_t* glyph = psf_.glyph(c);
for (uint8_t r = fb_row; r < fb_row + psf_.height(); r++) {
for (uint8_t c = fb_col; c < fb_col + psf_.width(); c++) {
for (uint32_t r = fb_row; r < fb_row + psf_.height(); r++) {
for (uint32_t c = fb_col; c < fb_col + psf_.width(); c++) {
uint8_t glyph_offset = psf_.width() - (c - fb_col) - 1;
if ((glyph[r] & (1 << glyph_offset))) {
framebuf_.DrawPixel(r, c, 0xFFFFFFF);
@ -21,8 +31,14 @@ void Console::WriteChar(char c) {
cursor_pos_++;
}
void Console::WriteString(glcr::StringView str) {
for (uint64_t i = 0; i < str.size(); i++) {
WriteChar(str[i]);
}
}
void Console::CursorReturn() {
cursor_pos_ -= cursor_pos_ % cols();
cursor_pos_ += cols();
}

3
sys/teton/framebuffer/console.h
View file

@ -20,4 +20,7 @@ class Console {
Framebuffer& framebuf_;
Psf& psf_;
uint64_t cursor_pos_ = 0;
void CursorIncr();
void CursorReturn();
};