From c09c91e185aad8e01b570c2569e13c1e429d2f99 Mon Sep 17 00:00:00 2001 From: Kartik Agaram Date: Sun, 5 Jul 2020 12:13:28 -0700 Subject: 6612 - reorganize layers --- 304screen.subx | 338 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 338 insertions(+) create mode 100644 304screen.subx (limited to '304screen.subx') diff --git a/304screen.subx b/304screen.subx new file mode 100644 index 00000000..116d0320 --- /dev/null +++ b/304screen.subx @@ -0,0 +1,338 @@ +# Primitives for screen control. +# Require Linux and a modern terminal. + +== code + +enable-screen-grid-mode: + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (flush Stdout) + (flush Stderr) + # switch to second screen buffer + (write 2 Esc) + (write 2 "[?1049h") + # + (clear-screen) +$enable-screen-grid-mode:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +enable-screen-type-mode: + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # switch to first screen buffer + (write 2 Esc) + (write 2 "[?1049l") +$enable-screen-type-mode:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +screen-size: # -> nrows/eax: int, ncols/ecx: int + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # . save registers + 52/push-edx + 53/push-ebx + 56/push-esi + 57/push-edi + # + (_maybe-open-terminal) + # var window-size-info/esi: (addr winsize) + # winsize is a type from the Linux kernel. We don't care how large it is. + 81 5/subop/subtract %esp 0x40/imm32 + 89/<- %esi 4/r32/esp + # ioctl(*Terminal-file-descriptor, TIOCGWINSZ, window-size-info) + 89/<- %edx 6/r32/esi + b9/copy-to-ecx 0x5413/imm32/TIOCGWINSZ + 8b/-> *Terminal-file-descriptor 3/r32/ebx + e8/call syscall_ioctl/disp32 + # some bitworking to extract 2 16-bit shorts + 8b/-> *esi 0/r32/eax + 81 4/subop/and %eax 0xffff/imm32 + 8b/-> *esi 1/r32/ecx + c1/shift 5/subop/logical-right %ecx 0x10/imm8 +$screen-size:end: + # . reclaim locals + 81 0/subop/add %esp 0x40/imm32 + # . restore registers + 5f/pop-to-edi + 5e/pop-to-esi + 5b/pop-to-ebx + 5a/pop-to-edx + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +clear-screen: + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (write 2 Esc) + (write 2 "[H") + (write 2 Esc) + (write 2 "[2J") +$clear-screen:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +# row and col count from the top-left as (1, 1) +move-cursor-on-screen: # row: int, column: int + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # . save registers + 51/push-ecx + # var buf/ecx: (stream byte 32) + 81 5/subop/subtract %esp 0x20/imm32 + 68/push 0x20/imm32/size + 68/push 0/imm32/read + 68/push 0/imm32/write + 89/<- %ecx 4/r32/esp + # construct directive in buf + (write %ecx Esc) + (write %ecx "[") + (write-int32-decimal %ecx *(ebp+8)) + (write %ecx ";") + (write-int32-decimal %ecx *(ebp+0xc)) + (write %ecx "H") + # flush + (write-stream 2 %ecx) +$move-cursor-on-screen:end: + # . reclaim locals + 81 0/subop/add %esp 0x2c/imm32 + # . restore registers + 59/pop-to-ecx + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +print-string-to-screen: # s: (addr array byte) + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (write 2 *(ebp+8)) +$print-string-to-screen:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +# just because Mu has no support for global variables yet +print-byte-to-screen: # c: byte + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # . save registers + 51/push-ecx + # var s/ecx: (addr array byte) + ff 6/subop/push *(ebp+8) + 68/push 4/imm32/size + 89/<- %ecx 4/r32/esp + (write 2 %ecx) +$print-byte-to-screen:end: + # . reclaim locals + 81 0/subop/add %esp 8/imm32 + # . restore registers + 59/pop-to-ecx + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +# just because Mu has no support for global variables yet +print-int32-hex-to-screen: # n: int + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (write-int32-hex-buffered Stdout *(ebp+8)) + (flush Stdout) +$print-int32-hex-to-screen:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +reset-formatting-on-screen: + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (write 2 Esc) + (write 2 "(B") + (write 2 Esc) + (write 2 "[m") +$reset-formatting-on-screen:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +start-color-on-screen: # fg: int, bg: int + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # . save registers + 51/push-ecx + # var buf/ecx: (stream byte 32) + 81 5/subop/subtract %esp 0x20/imm32 + 68/push 0x20/imm32/size + 68/push 0/imm32/read + 68/push 0/imm32/write + 89/<- %ecx 4/r32/esp + # construct directive in buf + # . set fg + (write %ecx Esc) + (write %ecx "[38;5;") + (write-int32-decimal %ecx *(ebp+8)) + (write %ecx "m") + # . set bg + (write %ecx Esc) + (write %ecx "[48;5;") + (write-int32-decimal %ecx *(ebp+0xc)) + (write %ecx "m") + # flush + (write-stream 2 %ecx) +$start-color-on-screen:end: + # . reclaim locals + 81 0/subop/add %esp 0x2c/imm32 + # . restore registers + 59/pop-to-ecx + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +start-bold-on-screen: + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (write 2 Esc) + (write 2 "[1m") +$start-bold-on-screen:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +start-underline-on-screen: + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (write 2 Esc) + (write 2 "[4m") +$start-underline-on-screen:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +start-reverse-video-on-screen: + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (write 2 Esc) + (write 2 "[7m") +$start-reverse-video-on-screen:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +# might require enabling blinking in your terminal program +start-blinking-on-screen: + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (write 2 Esc) + (write 2 "[5m") +$start-blinking-on-screen:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +hide-cursor-on-screen: + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (write 2 Esc) + (write 2 "[?25l") +$hide-cursor-on-screen:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +show-cursor-on-screen: + # . prologue + 55/push-ebp + 89/<- %ebp 4/r32/esp + # + (write 2 Esc) + (write 2 "[?12l") + (write 2 Esc) + (write 2 "[?25h") +$show-cursor-on-screen:end: + # . epilogue + 89/<- %esp 5/r32/ebp + 5d/pop-to-ebp + c3/return + +# This is a low-level detail; I don't think everything should be a file. +# +# Open "/dev/tty" if necessary and cache its file descriptor in Terminal-file-descriptor +# where later primitives can use it. +_maybe-open-terminal: + 81 7/subop/compare *Terminal-file-descriptor -1/imm32 + 75/jump-if-!= $_maybe-open-terminal:epilogue/disp8 + # . save registers + 50/push-eax + 51/push-ecx + 53/push-ebx + # open("/dev/tty", O_RDWR) + bb/copy-to-ebx Terminal-filename/imm32 + b9/copy-to-ecx 2/imm32/O_RDWR + e8/call syscall_open/disp32 + 89/<- *Terminal-file-descriptor 0/r32/eax +$_maybe-open-terminal:end: + # . restore registers + 5b/pop-to-ebx + 59/pop-to-ecx + 58/pop-to-eax +$_maybe-open-terminal:epilogue: + c3/return + +== data + +Terminal-file-descriptor: # (addr int) + -1/imm32 + +Esc: # (addr array byte) + # size + 1/imm32 + # data + 0x1b + +Terminal-filename: # (addr kernel-string) + # "/dev/null" + 2f/slash 64/d 65/e 76/v 2f/slash 74/t 74/t 79/y 0/nul -- cgit 1.4.1-2-gfad0