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scroll kinda works but keyboard is random

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xamidev
2026-01-10 11:32:27 +01:00
parent 9cbecc1689
commit b469952d91
2 changed files with 106 additions and 99 deletions
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203
src/io/term/term.c
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@@ -26,68 +26,20 @@ uint8_t* glyphs = _binary_zap_light16_psf_start + sizeof(PSF1_Header);
// Character cursor
typedef struct
{
unsigned int x;
unsigned int y;
size_t x;
size_t y;
} Cursor;
Cursor cursor = {0};
static Cursor cursor = {0, 0};
unsigned char* fb;
struct limine_framebuffer* framebuffer;
static uint8_t* fb;
static struct limine_framebuffer* framebuffer;
uint8_t lines_length[MAX_LINES];
int term_init()
static inline size_t term_max_cols(void)
{
// Get framebuffer address from Limine struct
if (boot_ctx.fb)
{
fb = boot_ctx.fb->address;
framebuffer = boot_ctx.fb;
DEBUG("terminal initialized, fb=0x%p (width=%u height=%u pitch=%u bpp=%u)", fb, framebuffer->width, framebuffer->height, framebuffer->pitch, framebuffer->bpp);
return 0;
}
return -ENOMEM;
}
// These are marked "static" because we don't wanna expose them all around
// AKA they should just be seen here (kind of like private functions in cpp)
static void putpixel(int x, int y, int color)
{
// Depth isn't part of limine_framebuffer attributes so it will be 4
unsigned pos = x*4 + y*framebuffer->pitch;
fb[pos] = color & 255; // blue channel
fb[pos+1] = (color >> 8) & 255; // green
fb[pos+2] = (color >> 16) & 255; // blue
}
static void draw_char(char c, int px, int py, int fg, int bg)
{
uint8_t* glyph = glyphs + ((unsigned char)c * FONT_HEIGHT);
for (size_t y=0; y<FONT_HEIGHT; y++)
{
uint8_t row = glyph[y];
for (size_t x=0; x<8; x++)
{
int color = (row & (0x80 >> x)) ? fg : bg;
putpixel(px+x, py+y, color);
}
}
}
static void erase_char(int px, int py)
{
for (size_t y=0; y<FONT_HEIGHT; y++)
{
for (size_t x=0; x<8; x++)
{
// Black
putpixel(px+x, py+y, 0);
}
}
return framebuffer->width / FONT_WIDTH;
}
static inline size_t term_max_lines(void)
@@ -95,6 +47,69 @@ static inline size_t term_max_lines(void)
return framebuffer->height / FONT_HEIGHT;
}
int term_init()
{
// Get framebuffer address from Limine struct
if (!boot_ctx.fb)
{
return -ENOMEM;
}
framebuffer = boot_ctx.fb;
fb = (uint8_t*)framebuffer->address;
memset(lines_length, 0, sizeof(lines_length));
DEBUG("terminal initialized, fb=0x%p (width=%u height=%u pitch=%u bpp=%u)", fb, framebuffer->width, framebuffer->height, framebuffer->pitch, framebuffer->bpp);
return 0;
}
// These are marked "static" because we don't wanna expose them all around
// AKA they should just be seen here (kind of like private functions in cpp)
static inline void putpixel(size_t x, size_t y, uint32_t color)
{
// Guard so we don't write past fb boundaries
if (x >= framebuffer->width || y >= framebuffer->height) return;
// Depth isn't part of limine_framebuffer attributes so it will be 4
size_t pos = x*4 + y*framebuffer->pitch;
fb[pos] = color & 255; // blue channel
fb[pos+1] = (color >> 8) & 255; // green
fb[pos+2] = (color >> 16) & 255; // blue
}
static void draw_char(char c, size_t px, size_t py, uint32_t fg, uint32_t bg)
{
// So we cannot write past fb
if (px+FONT_WIDTH > framebuffer->width || py+FONT_HEIGHT > framebuffer->height) return;
uint8_t* glyph = glyphs + ((unsigned char)c * FONT_HEIGHT);
for (size_t y=0; y<FONT_HEIGHT; y++)
{
uint8_t row = glyph[y];
for (size_t x=0; x<FONT_WIDTH; x++)
{
uint32_t color = (row & (0x80 >> x)) ? fg : bg;
putpixel(px+x, py+y, color);
}
}
}
static void erase_char(size_t px, size_t py)
{
if (px+FONT_WIDTH > framebuffer->width || py+FONT_HEIGHT > framebuffer->height) return;
for (size_t y=0; y<FONT_HEIGHT; y++)
{
for (size_t x=0; x<FONT_HEIGHT; x++)
{
// Black
putpixel(px+x, py+y, 0);
}
}
}
void term_scroll()
{
const size_t row_height = FONT_HEIGHT;
@@ -121,71 +136,63 @@ void term_scroll()
}
lines_length[max_lines - 1] = 0;
if (cursor.y > 0)
{
cursor.y--;
}
}
void putchar(char c)
{
if ((c == '\n') && ((cursor.y+1)*FONT_HEIGHT >= framebuffer->height))
{
term_scroll();
return;
}
const size_t max_cols = term_max_cols();
const size_t max_lines = term_max_lines();
if (c == '\n')
{
if (c == '\n') {
lines_length[cursor.y] = cursor.x;
cursor.x = 0;
cursor.y++;
if (cursor.y + 1 >= max_lines)
{
term_scroll();
}
else
{
cursor.y++;
}
return;
}
// TODO: Improperly handled.
// When we're on an empty line it should get to the upper line's last character
// NOT just the last position possible; we would need to track the last line's character amount for that
if (c == '\b')
if (c == '\b')
{
if (cursor.x == 0 && cursor.y == 0)
if (cursor.x > 0)
{
cursor.x--;
}
else if (cursor.y > 0)
{
cursor.y--;
cursor.x = lines_length[cursor.y];
}
else
{
// Top-left corner
return;
}
if (cursor.x == 0)
{
cursor.y--;
// cursor.x = (framebuffer->width / FONT_WIDTH) -1; // here
cursor.x = lines_length[cursor.y];
}
else {
cursor.x--;
}
int px = cursor.x * FONT_WIDTH;
int py = cursor.y * FONT_HEIGHT;
erase_char(px, py);
erase_char(cursor.x * FONT_WIDTH, cursor.y * FONT_HEIGHT);
return;
}
if ((cursor.x+1)*FONT_WIDTH >= framebuffer->width)
if (cursor.x >= max_cols)
{
cursor.x = 0;
cursor.y++;
if (cursor.y + 1 >= max_lines)
{
term_scroll();
}
else
{
cursor.y++;
}
}
if ((cursor.y+1)*FONT_HEIGHT >= framebuffer->height)
{
term_scroll();
}
int px = cursor.x * FONT_WIDTH;
int py = cursor.y * FONT_HEIGHT;
draw_char(c, px, py, WHITE, BLACK);
draw_char(c, cursor.x * FONT_WIDTH, cursor.y * FONT_HEIGHT, WHITE, BLACK);
cursor.x++;
}
@@ -198,7 +205,7 @@ void _putchar(char character)
// Debug-printing
void kputs(const char* str)
{
unsigned int i=0;
size_t i=0;
while (str[i] != 0)
{
putchar(str[i]);