diff options
| -rw-r--r-- | build.zig | 9 | ||||
| -rw-r--r-- | font/default8x16.psfu | bin | 0 -> 4969 bytes | |||
| -rw-r--r-- | kernel/drivers.c (renamed from kernel/drivers/drivers.c) | 2 | ||||
| -rw-r--r-- | kernel/drivers/gpu.c | 119 | ||||
| -rw-r--r-- | kernel/drivers/gpu/bochs.c | 98 | ||||
| -rw-r--r-- | kernel/drivers/term.c | 105 | ||||
| -rw-r--r-- | kernel/drivers/vga.c | 25 | ||||
| -rw-r--r-- | kernel/font.S | 7 | ||||
| -rw-r--r-- | kernel/include/comus/drivers/gpu.h | 50 | ||||
| -rw-r--r-- | kernel/include/comus/drivers/gpu/bochs.h | 40 | ||||
| -rw-r--r-- | kernel/include/comus/drivers/term.h | 37 | ||||
| -rw-r--r-- | kernel/include/comus/drivers/vga.h | 22 | ||||
| -rw-r--r-- | kernel/include/comus/limits.h | 4 | ||||
| -rw-r--r-- | kernel/include/comus/term.h | 85 | ||||
| -rw-r--r-- | kernel/include/lib/kctype.h | 5 | ||||
| -rw-r--r-- | kernel/lib/isprint.c | 6 | ||||
| -rw-r--r-- | kernel/lib/kprintf.c | 2 | ||||
| -rw-r--r-- | kernel/main.c | 2 | ||||
| -rw-r--r-- | kernel/term.c | 169 |
19 files changed, 642 insertions, 145 deletions
@@ -27,12 +27,15 @@ const kernel_src = &[_][]const u8{ "kernel/cpu/idt.c", "kernel/cpu/idt.S", "kernel/cpu/pic.c", + "kernel/drivers.c", "kernel/drivers/acpi.c", "kernel/drivers/clock.c", - "kernel/drivers/drivers.c", + "kernel/drivers/gpu.c", + "kernel/drivers/gpu/bochs.c", "kernel/drivers/pci.c", - "kernel/drivers/term.c", "kernel/drivers/uart.c", + "kernel/drivers/vga.c", + "kernel/font.S", "kernel/fs/fs.c", "kernel/lib/atox.c", "kernel/lib/backtrace.c", @@ -40,6 +43,7 @@ const kernel_src = &[_][]const u8{ "kernel/lib/btoa.c", "kernel/lib/ctoi.c", "kernel/lib/isdigit.c", + "kernel/lib/isprint.c", "kernel/lib/isspace.c", "kernel/lib/itoc.c", "kernel/lib/kalloc.c", @@ -71,6 +75,7 @@ const kernel_src = &[_][]const u8{ "kernel/memory/physalloc.c", "kernel/memory/virtalloc.c", "kernel/procs/procs.c", + "kernel/term.c", }; const Prog = struct { diff --git a/font/default8x16.psfu b/font/default8x16.psfu Binary files differnew file mode 100644 index 0000000..e789b77 --- /dev/null +++ b/font/default8x16.psfu diff --git a/kernel/drivers/drivers.c b/kernel/drivers.c index 4e8f175..04145db 100644 --- a/kernel/drivers/drivers.c +++ b/kernel/drivers.c @@ -2,6 +2,7 @@ #include <comus/drivers/acpi.h> #include <comus/drivers/uart.h> #include <comus/drivers/pci.h> +#include <comus/drivers/gpu.h> #include <comus/mboot.h> void drivers_init(void) @@ -9,4 +10,5 @@ void drivers_init(void) uart_init(); pci_init(); acpi_init(mboot_get_rsdp()); + gpu_init(); } diff --git a/kernel/drivers/gpu.c b/kernel/drivers/gpu.c new file mode 100644 index 0000000..7ecdada --- /dev/null +++ b/kernel/drivers/gpu.c @@ -0,0 +1,119 @@ +#include <lib.h> +#include <comus/drivers/gpu.h> +#include <comus/drivers/gpu/bochs.h> +#include <comus/error.h> +#include <comus/term.h> +#include <comus/asm.h> + +enum gpu_type { + GPU_UNSET = 0, + GPU_BOCHS = 1, + N_GPU_TYPE, +}; + +static enum gpu_type type = GPU_UNSET; + +static const char *gpu_type_str[N_GPU_TYPE] = { + "Unknown", "Bochs" +}; + +struct psf2_font { + uint8_t magic[4]; + uint32_t version; + uint32_t header_size; + uint32_t flags; + uint32_t length; + uint32_t glyph_size; + uint32_t height; + uint32_t width; + uint8_t data[]; +}; + +extern struct psf2_font en_font; + +int gpu_init(void) +{ + if (bochs_init() == SUCCESS) + type = GPU_BOCHS; + + if (type != GPU_UNSET) { + uint16_t width = gpu_width() / en_font.width; + uint16_t height = gpu_height() / en_font.height; + term_switch_handler(width, height, gpu_draw_char); + } + + return type != GPU_UNSET; +} + +uint32_t gpu_width(void) +{ + switch (type) { + case GPU_BOCHS: + return bochs_width(); + default: + return 0; + } +} + +uint32_t gpu_height(void) +{ + switch (type) { + case GPU_BOCHS: + return bochs_height(); + default: + return 0; + } +} + +uint8_t gpu_bit_depth(void) +{ + switch (type) { + case GPU_BOCHS: + return bochs_bit_depth(); + default: + return 0; + } +} + +void gpu_set_pixel(uint32_t x, uint32_t y, uint32_t r, uint32_t g, uint32_t b) +{ + switch (type) { + case GPU_BOCHS: + bochs_set_pixel(x, y, r, g, b); + break; + default: + break; + } +} + +void gpu_draw_char(char c, uint16_t cx, uint16_t cy) +{ + uint32_t sx = en_font.width * cx; + uint32_t sy = en_font.height * cy; + + uint8_t *glyph = &en_font.data[en_font.glyph_size * c]; + + for (uint32_t i = 0; i < en_font.width; i++) { + for (uint32_t j = 0; j < en_font.height; j++) { + uint32_t x = sx + (en_font.width - i - 1); + uint32_t y = sy + j; + uint32_t bitoff = i + j * en_font.width; + uint32_t byteoff = bitoff / 8; + uint32_t bitshift = bitoff % 8; + + uint32_t color = ((glyph[byteoff] >> bitshift) & 0x1) * 255; + gpu_set_pixel(x, y, color, color, color); + } + } +} + +void gpu_report(void) +{ + if (type == GPU_UNSET) + return; + + kprintf("GPU (%s)\n", gpu_type_str[type]); + kprintf("Width: %d\n", gpu_width()); + kprintf("Height: %d\n", gpu_height()); + kprintf("Bit depth: %d\n\n", gpu_bit_depth()); +} diff --git a/kernel/drivers/gpu/bochs.c b/kernel/drivers/gpu/bochs.c new file mode 100644 index 0000000..5b0f1fc --- /dev/null +++ b/kernel/drivers/gpu/bochs.c @@ -0,0 +1,98 @@ +#include <lib.h> +#include <comus/asm.h> +#include <comus/memory.h> +#include <comus/drivers/pci.h> +#include <comus/drivers/gpu/bochs.h> + +#define INDEX 0x1CE +#define DATA 0x1CF + +#define INDEX_ID 0 +#define INDEX_XRES 1 +#define INDEX_YRES 2 +#define INDEX_BPP 3 +#define INDEX_ENABLE 4 +#define INDEX_BANK 5 +#define INDEX_VIRT_WIDTH 6 +#define INDEX_VIRT_HEIGHT 7 +#define INDEX_X_OFFSET 8 +#define INDEX_Y_OFFSET 9 + +#define DATA_DISP_DISABLE 0x00 +#define DATA_DISP_ENABLE 0x01 +#define DATA_LFB_ENABLE 0x40 +#define DATA_NO_CLEAR_MEM 0x80 + +#define BOCHS_PCI_VENDOR 0x1234 +#define BOCHS_PCI_DEVICE 0x1111 + +#define BOCHS_WIDTH 1024 +#define BOCHS_HEIGHT 768 +#define BOCHS_BIT_DEPTH 32 + +static volatile uint32_t *framebuffer; +static uint16_t width = BOCHS_WIDTH; +static uint16_t height = BOCHS_HEIGHT; +static uint8_t bit_depth = BOCHS_BIT_DEPTH; + +static void write(uint16_t index, uint16_t data) { + outw(INDEX, index); + outw(DATA, data); +} + +static uint16_t read(uint16_t value) { + outw(INDEX, value); + return inw(DATA); +} + +static int is_available(void) { + return (read(INDEX_ID) == 0xB0C5); +} + +static void set_mode(uint16_t width, uint16_t height, uint16_t bit_depth, int lfb, int clear) { + write(INDEX_ENABLE, DATA_DISP_DISABLE); + write(INDEX_XRES, width); + write(INDEX_YRES, height); + write(INDEX_BPP, bit_depth); + write(INDEX_ENABLE, DATA_DISP_ENABLE | + (lfb ? DATA_LFB_ENABLE : 0) | + (clear ? 0 : DATA_NO_CLEAR_MEM)); +} + +int bochs_init(void) { + struct pci_device bochs = {0}; + bool found = pci_findby_id(&bochs, BOCHS_PCI_DEVICE, BOCHS_PCI_VENDOR, NULL); + if (!found) + return 1; + + set_mode(width, height, bit_depth, true, true); + if (!is_available()) + return 1; + + uint32_t bar0 = pci_rcfg_d(bochs, PCI_BAR0_D); + uint32_t *addr = (uint32_t *) (uintptr_t) bar0; + framebuffer = kmapaddr(addr, NULL, width * height * bit_depth, F_WRITEABLE); + + return 0; +} + +uint32_t bochs_width(void) +{ + return width; +} + +uint32_t bochs_height(void) +{ + return height; +} + +uint8_t bochs_bit_depth(void) +{ + return bit_depth; +} + +void bochs_set_pixel(uint32_t x, uint32_t y, uint32_t r, uint32_t g, uint32_t b) +{ + uint32_t index = x + y * width; + framebuffer[index] = (b << 0) | (g << 8) | (r << 16); +} diff --git a/kernel/drivers/term.c b/kernel/drivers/term.c deleted file mode 100644 index d1cd553..0000000 --- a/kernel/drivers/term.c +++ /dev/null @@ -1,105 +0,0 @@ -#include <lib.h> -#include <comus/drivers/term.h> -#include <comus/asm.h> -#include <comus/memory.h> - -#define VGA_ADDR 0xB8000 - -static const uint8_t width = 80; -static const uint8_t height = 25; -static volatile uint16_t *buffer = (uint16_t *)VGA_ADDR; - -// position -static uint32_t x = 0, y = 0; - -// color -static uint8_t fg = 15, bg = 0; - -// blank color -const uint16_t blank = (uint16_t)0 | 0 << 12 | 15 << 8; - -void term_clear_line(int line) -{ - if (line < 0 || line >= height) - return; - for (uint8_t x = 0; x < width; x++) { - const size_t index = line * width + x; - buffer[index] = blank; - } -} - -void term_clear(void) -{ - for (uint8_t y = 0; y < height; y++) - term_clear_line(y); -} - -void term_scroll(int lines) -{ - cli(); - y -= lines; - if (!lines) - return; - if (lines >= height || lines <= -height) { - term_clear(); - } else if (lines > 0) { - memmovev(buffer, buffer + lines * width, 2 * (height - lines) * width); - term_clear_line(height - lines); - } else { - memmovev(buffer + lines * width, buffer + lines, - (height + lines) * width); - } - sti(); -} - -void term_out(char c) -{ - if (buffer == NULL) - return; - - // handle special chars - switch (c) { - case '\n': - x = 0; - y++; - break; - case '\t': - x += 4; - break; - case '\v': - case '\f': - y++; - break; - case '\r': - x = 0; - break; - default: { - const size_t index = y * width + x; - buffer[index] = c | bg << 12 | fg << 8; - x++; - } - } - - // wrap cursor if needed - if (x >= width) { - x = 0; - y++; - } - if (y >= height) { - term_scroll(y - (height - 1)); - y = height - 1; - } - - // set cursor position on screen - const uint16_t pos = y * width + x; - outb(0x3D4, 0x0F); - outb(0x3D5, (uint8_t)(pos & 0xFF)); - outb(0x3D4, 0x0E); - outb(0x3D5, (uint8_t)((pos >> 8) & 0xFF)); -} - -void term_out_str(const char *str) -{ - while (*str) - term_out(*str++); -} diff --git a/kernel/drivers/vga.c b/kernel/drivers/vga.c new file mode 100644 index 0000000..d73fa9f --- /dev/null +++ b/kernel/drivers/vga.c @@ -0,0 +1,25 @@ +#include <lib.h> +#include <comus/term.h> +#include <comus/asm.h> +#include <comus/memory.h> +#include <comus/drivers/vga.h> + +#define VGA_ADDR 0xB8000 +static volatile uint16_t *buffer = (uint16_t *)VGA_ADDR; + +// color +static uint8_t fg = 15, bg = 0; + +void vga_draw_char(char c, uint16_t x, uint16_t y) +{ + // output character + const size_t index = y * VGA_WIDTH + x; + buffer[index] = c | bg << 12 | fg << 8; + + // set cursor position on screen + const uint16_t pos = y * VGA_HEIGHT + x; + outb(0x3D4, 0x0F); + outb(0x3D5, (uint8_t)(pos & 0xFF)); + outb(0x3D4, 0x0E); + outb(0x3D5, (uint8_t)((pos >> 8) & 0xFF)); +} diff --git a/kernel/font.S b/kernel/font.S new file mode 100644 index 0000000..f125e90 --- /dev/null +++ b/kernel/font.S @@ -0,0 +1,7 @@ + .globl en_font + + .section .rodata + + .align 8 +en_font: + .incbin "../../font/default8x16.psfu" diff --git a/kernel/include/comus/drivers/gpu.h b/kernel/include/comus/drivers/gpu.h new file mode 100644 index 0000000..d6b4266 --- /dev/null +++ b/kernel/include/comus/drivers/gpu.h @@ -0,0 +1,50 @@ +/** + * @file gpu.h + * + * @author Freya Murphy <freya@freyacat.org> + * + * Graphics Driver Initalization + */ + +#ifndef GPU_H_ +#define GPU_H_ + +#include <stdint.h> + +/** + * Loads any gpu graphics driver + * @returns 0 on success + */ +int gpu_init(void); + +/** + * @returns the width of the framebuffer + */ +uint32_t gpu_width(void); + +/** + * @returns the height of the framebuffer + */ +uint32_t gpu_height(void); + +/** + * @returns the bit depth of the framebuffer + */ +uint8_t gpu_bit_depth(void); + +/** + * Sets the pixel at a given position + */ +void gpu_set_pixel(uint32_t x, uint32_t y, uint32_t r, uint32_t g, uint32_t b); + +/** + * Draw a character on the gpu at a given (terminal) position + */ +void gpu_draw_char(char c, uint16_t x, uint16_t y); + +/** + * Reports the state of the gpu + */ +void gpu_report(void); + +#endif /* gpu.h */ diff --git a/kernel/include/comus/drivers/gpu/bochs.h b/kernel/include/comus/drivers/gpu/bochs.h new file mode 100644 index 0000000..5933a3a --- /dev/null +++ b/kernel/include/comus/drivers/gpu/bochs.h @@ -0,0 +1,40 @@ +/** + * @file bochs.h + * + * @author Freya Murphy <freya@freyacat.org> + * + * Bochs Graphics Driver + */ + +#ifndef BOCHS_H_ +#define BOCHS_H_ + +#include <stdint.h> + +/** + * Loads the bochs graphics driver + * @returns 0 on success + */ +int bochs_init(void); + +/** + * @returns the width of the framebuffer + */ +uint32_t bochs_width(void); + +/** + * @returns the height of the framebuffer + */ +uint32_t bochs_height(void); + +/** + * @returns the bit depth of the framebuffer + */ +uint8_t bochs_bit_depth(void); + +/** + * Sets the pixel at a given position + */ +void bochs_set_pixel(uint32_t x, uint32_t y, uint32_t r, uint32_t g, uint32_t b); + +#endif /* bochs.h */ diff --git a/kernel/include/comus/drivers/term.h b/kernel/include/comus/drivers/term.h deleted file mode 100644 index ad55bfd..0000000 --- a/kernel/include/comus/drivers/term.h +++ /dev/null @@ -1,37 +0,0 @@ -/** - * @file tty.h - * - * @author Freya Murphy <freya@freyacat.org> - * - * Terminal output - */ - -#ifndef TERM_H_ -#define TERM_H_ - -/** - * Output a character to the terminal - */ -void term_out(char c); - -/** - * Output a string to the terminal - */ -void term_out_str(const char *str); - -/** - * Clear all lines on the terminal - */ -void term_clear(void); - -/** - * Clear a specifc line on the terminal terminal - */ -void term_clear_line(int line); - -/** - * Scroll terminal - */ -void term_scroll(int lines); - -#endif /* tty.h */ diff --git a/kernel/include/comus/drivers/vga.h b/kernel/include/comus/drivers/vga.h new file mode 100644 index 0000000..71906f6 --- /dev/null +++ b/kernel/include/comus/drivers/vga.h @@ -0,0 +1,22 @@ +/** + * @file vga.h + * + * @author Freya Murphy <freya@freyacat.org> + * + * VGA Text Mode Functions + */ + +#ifndef VGA_H_ +#define VGA_H_ + +#define VGA_WIDTH 80 +#define VGA_HEIGHT 25 + +#include <stdint.h> + +/** + * Draw a character to the vga text mode at a given position + */ +void vga_draw_char(char c, uint16_t x, uint16_t y); + +#endif /* vga.h */ diff --git a/kernel/include/comus/limits.h b/kernel/include/comus/limits.h index 173d013..2942b89 100644 --- a/kernel/include/comus/limits.h +++ b/kernel/include/comus/limits.h @@ -8,3 +8,7 @@ /// max number of processes #define N_PROCS 256 + +/// length of terminal buffer +#define TERM_MAX_WIDTH 480 +#define TERM_MAX_HEIGHT 270 diff --git a/kernel/include/comus/term.h b/kernel/include/comus/term.h new file mode 100644 index 0000000..2d39915 --- /dev/null +++ b/kernel/include/comus/term.h @@ -0,0 +1,85 @@ +/** + * @file term.h + * + * @author Freya Murphy <freya@freyacat.org> + * + * Terminal output + */ + +#ifndef TERM_H_ +#define TERM_H_ + +#include <stdint.h> + +/// vtable structure for terminal handlers +/// +/// required: +/// out_at - put out char at position +/// scroll - scroll the terminal count lines +/// +/// optional: +/// clear - clear terminal +/// clear_line - clear a specific line on the terminal +/// +struct terminal { + uint16_t width; + uint16_t height; + void (*draw_char)(char c, uint16_t x, uint16_t y); +}; + +/** + * Get the character width of the terminal + */ +uint16_t term_width(void); + +/** + * Get the character height of the terminal + */ +uint16_t term_height(void); + +/** + * Output a character to the terminal + */ +void term_out(char c); + +/** + * Output a character to the terminal at a given position + */ +void term_out_at(char c, uint16_t x, uint16_t y); + +/** + * Output a string to the terminal + */ +void term_out_str(const char *str); + +/** + * Output a string to the terminal at a given position + */ +void term_out_str_at(const char *str, uint16_t x, uint16_t y); + +/** + * Clear all lines on the terminal + */ +void term_clear(void); + +/** + * Clear a specifc line on the terminal terminal + */ +void term_clear_line(uint16_t line); + +/** + * Redraw terminal + */ +void term_redraw(void); + +/** + * Scroll terminal + */ +void term_scroll(uint16_t lines); + +/** + * Switch terminal handler + */ +void term_switch_handler(uint16_t width, uint16_t height, void (*draw_char)(char c, uint16_t x, uint16_t y)); + +#endif /* term.h */ diff --git a/kernel/include/lib/kctype.h b/kernel/include/lib/kctype.h index 6d090c6..aee1bb9 100644 --- a/kernel/include/lib/kctype.h +++ b/kernel/include/lib/kctype.h @@ -19,4 +19,9 @@ int isspace(int c); */ int isdigit(int c); +/** + * @returns if a character is ascii printable + */ +int isprint(int c); + #endif /* kctype.h */ diff --git a/kernel/lib/isprint.c b/kernel/lib/isprint.c new file mode 100644 index 0000000..e5582dc --- /dev/null +++ b/kernel/lib/isprint.c @@ -0,0 +1,6 @@ +#include <lib.h> + +int isprint(int c) +{ + return ((unsigned)(c - 0x20) <= (0x7e - 0x20)); +} diff --git a/kernel/lib/kprintf.c b/kernel/lib/kprintf.c index 269318f..452e45c 100644 --- a/kernel/lib/kprintf.c +++ b/kernel/lib/kprintf.c @@ -1,7 +1,7 @@ #include "lib/kio.h" #include <lib.h> +#include <comus/term.h> #include <comus/drivers/uart.h> -#include <comus/drivers/term.h> #define PRINTF_NUMERIC_BUF_LEN 50 diff --git a/kernel/main.c b/kernel/main.c index f600320..99954d6 100644 --- a/kernel/main.c +++ b/kernel/main.c @@ -5,6 +5,7 @@ #include <comus/drivers.h> #include <comus/drivers/acpi.h> #include <comus/drivers/pci.h> +#include <comus/drivers/gpu.h> #include <comus/fs.h> #include <lib.h> @@ -14,6 +15,7 @@ void kreport(void) memory_report(); acpi_report(); pci_report(); + gpu_report(); } void main(long magic, volatile void *mboot) diff --git a/kernel/term.c b/kernel/term.c new file mode 100644 index 0000000..e40e0fe --- /dev/null +++ b/kernel/term.c @@ -0,0 +1,169 @@ +#include "lib/kio.h" +#include <lib.h> +#include <comus/term.h> +#include <comus/asm.h> +#include <comus/limits.h> +#include <comus/memory.h> +#include <comus/drivers/vga.h> +#include <comus/drivers/uart.h> + +// draw function +static void (*draw_char)(char c, uint16_t x, uint16_t y) = vga_draw_char; + +// terminal data +static char buffer[TERM_MAX_WIDTH * TERM_MAX_HEIGHT]; +static uint16_t buffer_line = UINT16_MAX; +static uint16_t width = VGA_WIDTH; +static uint16_t height = VGA_HEIGHT; +static uint16_t x = 0; +static uint16_t y = 0; + +#define BUFY(y) ((buffer_line + (y)) % TERM_MAX_HEIGHT) +#define BUFIDX(x,y) ((x) + (BUFY(y) * TERM_MAX_WIDTH)) + +static void buffer_check(void) +{ + if (buffer_line == UINT16_MAX) { + buffer_line = 0; + memset(buffer, 0, sizeof(buffer)); + } +} + +static inline bool printable(char c) +{ + switch (c) { + case '\0': + case '\n': + case '\t': + case '\v': + case '\f': + case '\r': + return false; + default: + return true; + } +} + +static inline void term_move_cur(char c) +{ + if (c == '\0') + return; + + switch (c) { + case '\n': + x = 0; + y++; + break; + case '\t': + x += 4; + break; + case '\v': + case '\f': + y++; + break; + case '\r': + x = 0; + break; + default: + x++; + } + + if (x >= width) { + x = 0; + y++; + } + if (y >= height) { + term_scroll(y - (height - 1)); + y = height - 1; + } +} + +uint16_t term_width(void) +{ + return width; +} + +uint16_t term_height(void) +{ + return height; +} + +void term_out(char c) +{ + term_out_at(c, x, y); + term_move_cur(c); +} + +void term_out_at(char c, uint16_t x, uint16_t y) +{ + buffer_check(); + + if (!printable(c)) + return; + + buffer[BUFIDX(x, y)] = c; + draw_char(c, x, y); +} + +void term_out_str(const char *str) +{ + char c; + while (c = *(str++), c) { + term_out_at(c, x, y); + term_move_cur(c); + } +} + +void term_out_str_at(const char *str, uint16_t x, uint16_t y) +{ + char c; + while (c = *(str++), c) + term_out_at(c, x, y); +} + +void term_clear(void) +{ + for (uint16_t y = 0; y < height; y++) + term_clear_line(y); +} + +void term_clear_line(uint16_t line) +{ + buffer_check(); + + if (line > height) + return; + + for (uint16_t x = 0; x < width; x++) { + buffer[BUFIDX(x, line)] = 0; + draw_char(0, x, line); + } +} + +void term_redraw(void) +{ + buffer_check(); + + for (uint16_t j = 0; j < height; j++) { + for (uint16_t i = 0; i < width; i++) { + char c = buffer[BUFIDX(i, j)]; + draw_char(c, i, j); + } + } +} + +void term_scroll(uint16_t lines) +{ + if (!lines) + return; + buffer_line += lines; + term_redraw(); +} + +void term_switch_handler(uint16_t w, uint16_t h, void (*fn)(char c, uint16_t x, uint16_t y)) +{ + draw_char = fn; + width = w % TERM_MAX_WIDTH; + height = h % TERM_MAX_HEIGHT; + term_redraw(); +} |