diff options
| -rw-r--r-- | builtin_draw.asm | 277 | ||||
| -rw-r--r-- | builtins.asm | 3 | ||||
| -rw-r--r-- | constants.asm | 1 |
3 files changed, 281 insertions, 0 deletions
diff --git a/builtin_draw.asm b/builtin_draw.asm new file mode 100644 index 0000000..d7aba3a --- /dev/null +++ b/builtin_draw.asm @@ -0,0 +1,277 @@ +%ifndef _BUILTIN_DRAW_ASM +%define _BUILTIN_DRAW_ASM + +%include "constants.asm" + +jmp builtin_draw + +align 1 +builtin_draw_storage_active: db 00h +builtin_draw_exit: db 00h + +align 2 +builtin_draw_kbd_data: dw 0000h +builtin_draw_cursor_pos: dw 0000h + + +builtin_draw: + push bp + mov bp, sp + pusha + + mov bx, 0 + mov dx, 07h + + .get_input: + call builtin_draw_input + call builtin_draw_perform + ;call builtin_draw_cursor_bounds_check + cmp byte [builtin_draw_exit], 0 + jnz .return + jmp .get_input + .return: + mov byte [builtin_draw_exit], 0 ; reset exit status + ;mov byte [builtin_draw_storage_active], 0 ; reset storage state + popa + mov sp, bp + pop bp + ret + + +builtin_draw_input: + mov ah, 01h + int 16h + jz .end + + mov [builtin_draw_kbd_data], ax + + mov ah, 00h + int 16h + + .end: + ret + +builtin_draw_cursor_setup: + mov ah, 02 + mov bh, 0 + mov dx, [builtin_draw_cursor_pos] + ret + + +builtin_draw_toolbar: + push es + push ax + mov ax, 0b800h ; set ES to video ram + mov es, ax + mov [es:0xf9e], byte 'C' ; direct write + mov [es:0xf9f], dl ; direct write current COLOR + pop ax + pop es + ret + .msg_color: db 'Color:',0 + + +builtin_draw_perform: + push bp + mov bp, sp + + call builtin_draw_toolbar + jz .end + + mov ax, [builtin_draw_kbd_data] + + cmp al, 1bh ; ESC + je .kill_program + + cmp ah, 3fh ; F5 + je .store_page + + cmp ah, 43h ; F9 + je .restore_page + + cmp ah, 4bh ; Left arrow + je .cursor_left + + cmp ah, 4dh ; Right arrow + je .cursor_right + + cmp ah, 50h ; Down arrow + je .cursor_down + + cmp ah, 48h ; Up arrow + je .cursor_up + + cmp al, '-' ; Minus + je .color_down + + cmp al, '+' ; Plus + je .color_up + + cmp al, 'f' ; f + je .color_fill + + jmp .output + + .kill_program: + mov byte [builtin_draw_exit], 1 + jmp .end + + .store_page: + push ds + push es + + mov ax, VIDEO_RAM ; source + mov ds, ax + mov si, 0000h ; color text memory + + ;mov ax, word [builtin_draw_storage_segment] ; destination segment + mov ax, .STORAGE_SEGMENT + mov es, ax + mov di, 0000h ; page storage + + mov cx, 80 * 25 + + cld + rep movsw + ;mov byte [builtin_draw_storage_active], 1 ; We have stored a page + + pop es + pop ds + jmp .end + + .restore_page: + ;cmp byte [builtin_draw_storage_active], 1 ; Is there a page to restore? + ;jne .end + + push ds + push es + + ;mov ax, word [builtin_draw_storage_segment] ; source segment + mov ax, .STORAGE_SEGMENT + mov ds, ax + mov si, 0000h ; page storage + + mov ax, VIDEO_RAM ; destination segment + mov es, ax + mov di, 0000h ; color text memory + + mov cx, 80 * 25 + + cld + rep movsw + + pop es + pop ds + jmp .end + + .cursor_up: + push ax + push bx + push dx + + call builtin_draw_cursor_setup + cmp dh, 0 + je .cursor_done + + dec dh + int 10h + mov [builtin_draw_cursor_pos], dx + + jmp .cursor_done + + .cursor_down: + push ax + push bx + push dx + + call builtin_draw_cursor_setup + + cmp dh, 22 + jg .cursor_done + + inc dh + int 10h + mov [builtin_draw_cursor_pos], dx + jmp .cursor_done + + .cursor_left: + push ax + push bx + push dx + + call builtin_draw_cursor_setup + cmp dl, 0 + je .cursor_done + + dec dl + int 10h + mov [builtin_draw_cursor_pos], dx + jmp .cursor_done + + .cursor_right: + push ax + push bx + push dx + + call builtin_draw_cursor_setup + cmp dl, 78 + jg .cursor_done + + inc dl + int 10h + mov [builtin_draw_cursor_pos], dx + jmp .cursor_done + + .cursor_done: + pop dx + pop bx + pop ax + jmp .end + + .color_down: + sub dl, 0x10 + jmp .end + + .color_up: + add dl, 0x10 + jmp .end + + .color_fill: + push ax + push bx + push cx + push dx + + mov ah, 06h + mov al, 24 + mov bh, dl + mov ch, 0 + mov cl, 0 + mov dh, 23 + mov dl, 79 + int 10h + + pop dx + pop cx + pop bx + pop ax + jmp .output + + .output: + mov ah, 09h + mov al, 20h + mov bh, 0 + mov bl, dl + mov cx, 1 + int 10h + + mov word [builtin_draw_kbd_data], 0000h + + .end: + mov sp, bp + pop bp + ret + + .STORAGE_SEGMENT equ 7000h + +%endif diff --git a/builtins.asm b/builtins.asm index d09282c..199cd9f 100644 --- a/builtins.asm +++ b/builtins.asm @@ -2,6 +2,7 @@ %define _BUILTINS_ASM %include "builtin_clear.asm" +%include "builtin_draw.asm" %include "builtin_echo.asm" %include "builtin_exit.asm" %include "builtin_free.asm" @@ -11,6 +12,7 @@ t_builtins_fn: dw builtin_clear + dw builtin_draw dw builtin_echo dw builtin_exit dw builtin_free @@ -21,6 +23,7 @@ t_builtins_fn: t_builtins_str: .clear: db 'clear', 0 + .draw: db 'draw', 0 .echo: db 'echo', 0 .exit: db 'exit', 0 .free: db 'free', 0 diff --git a/constants.asm b/constants.asm index 6bbda5c..ac6438a 100644 --- a/constants.asm +++ b/constants.asm @@ -1,6 +1,7 @@ %ifndef _CONSTANTS_ASM %define _CONSTANTS_ASM +VIDEO_RAM equ 0b800h MAX_ROWS equ 25 MAX_COLS equ 80 LENGTH_ROW equ 0A0h ; NOTE: length in bytes (80 * 2 = 160) |