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cosmopolitan/libc/vga/tty-graph.c

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Add basic character output for VGA graphics mode console (#649) * Test output of colors for VGA graphics modes in examples/vga.c * [metal] Character output in VGA graphics modes is mostly working * [metal] Mention magic key to switch video mode, at bootup
2022-10-05 13:46:50 +00:00
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
flip et / noet in modelines `et` means `expandtab`. ```sh rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\) et\(.*\) :vi/vi: \1 xoet\2:vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)noet\(.*\):vi/vi: \1et\2 :vi/' rg 'vi: .* :vi' -l -0 | \ xargs -0 sed -i '' 's/vi: \(.*\)xoet\(.*\):vi/vi: \1noet\2:vi/' ```
2023-12-08 03:11:56 +00:00
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
Add basic character output for VGA graphics mode console (#649) * Test output of colors for VGA graphics modes in examples/vga.c * [metal] Character output in VGA graphics modes is mostly working * [metal] Mention magic key to switch video mode, at bootup
2022-10-05 13:46:50 +00:00
╞══════════════════════════════════════════════════════════════════════════════╡
│ This is free and unencumbered software released into the public domain. │
│ │
│ Anyone is free to copy, modify, publish, use, compile, sell, or │
│ distribute this software, either in source code form or as a compiled │
│ binary, for any purpose, commercial or non-commercial, and by any │
│ means. │
│ │
│ In jurisdictions that recognize copyright laws, the author or authors │
│ of this software dedicate any and all copyright interest in the │
│ software to the public domain. We make this dedication for the benefit │
│ of the public at large and to the detriment of our heirs and │
│ successors. We intend this dedication to be an overt act of │
│ relinquishment in perpetuity of all present and future rights to this │
│ software under copyright law. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, │
│ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF │
│ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. │
│ IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR │
│ OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, │
│ ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR │
│ OTHER DEALINGS IN THE SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/newbie.h"
#include "libc/macros.internal.h"
#include "libc/str/str.h"
#include "libc/vga/vga.internal.h"
/**
[metal] Some minor fixes and tweaks (#933) * [metal] Ensure DF is clear when calling C from exception handler * [metal] Mark some internal routines and declarations as `@internal` * [metal] Fix crash under UEFI when command line string is NULL * [metal] Fix argc & argv[] setting, & VM page freeing, for UEFI Part of the memory occupied by the argv[] contents was erroneously used for page tables & then later erroneously freed. The symptom was that argv[0] would show up as an empty string ("").
2023-11-14 23:26:59 +00:00
* @internal
Show "screen of death" on VGA console upon program crash (#650) * [metal] Refactoring: separate out sys_writev_vga() and _vga_init() modules * [metal] Read VGA info from BDA before long mode entry, not after If using a pre-existing VGA text console, the VGA initialization code now retrieves the cursor position & character height from the BIOS data area while still in real mode — rather than reading from the BIOS data area only after entering long mode. (This should help make the code more correct, if Cosmopolitan were to support UEFI graphics output in the future. If the program were booted via UEFI, then the long mode IsMetal() code would still be activated, but the BIOS data area might not have been initialized in that case.) This change also means that there are now a few more fields in the `struct mman`. * [metal] VGA console can now show "screen of death" upon a crash There is now a new function _klog_vga(), which can be called by kprintf() to output system messages — e.g. information about CPU exceptions — on the VGA screen. * [metal] CPU exception handler now dumps cr2 value * [metal] Add demo of program crash reporting w/ bare metal VGA TTY * [metal] Reduce size of "screen of death" code
2022-10-06 12:36:15 +00:00
* @fileoverview Instantiation of routines for normal console output in
* graphical video modes.
Add basic character output for VGA graphics mode console (#649) * Test output of colors for VGA graphics modes in examples/vga.c * [metal] Character output in VGA graphics modes is mostly working * [metal] Mention magic key to switch video mode, at bootup
2022-10-05 13:46:50 +00:00
*
Show "screen of death" on VGA console upon program crash (#650) * [metal] Refactoring: separate out sys_writev_vga() and _vga_init() modules * [metal] Read VGA info from BDA before long mode entry, not after If using a pre-existing VGA text console, the VGA initialization code now retrieves the cursor position & character height from the BIOS data area while still in real mode — rather than reading from the BIOS data area only after entering long mode. (This should help make the code more correct, if Cosmopolitan were to support UEFI graphics output in the future. If the program were booted via UEFI, then the long mode IsMetal() code would still be activated, but the BIOS data area might not have been initialized in that case.) This change also means that there are now a few more fields in the `struct mman`. * [metal] VGA console can now show "screen of death" upon a crash There is now a new function _klog_vga(), which can be called by kprintf() to output system messages — e.g. information about CPU exceptions — on the VGA screen. * [metal] CPU exception handler now dumps cr2 value * [metal] Add demo of program crash reporting w/ bare metal VGA TTY * [metal] Reduce size of "screen of death" code
2022-10-06 12:36:15 +00:00
* @see libc/vga/tty-graph.inc
Add basic character output for VGA graphics mode console (#649) * Test output of colors for VGA graphics modes in examples/vga.c * [metal] Character output in VGA graphics modes is mostly working * [metal] Mention magic key to switch video mode, at bootup
2022-10-05 13:46:50 +00:00
*/
Show "screen of death" on VGA console upon program crash (#650) * [metal] Refactoring: separate out sys_writev_vga() and _vga_init() modules * [metal] Read VGA info from BDA before long mode entry, not after If using a pre-existing VGA text console, the VGA initialization code now retrieves the cursor position & character height from the BIOS data area while still in real mode — rather than reading from the BIOS data area only after entering long mode. (This should help make the code more correct, if Cosmopolitan were to support UEFI graphics output in the future. If the program were booted via UEFI, then the long mode IsMetal() code would still be activated, but the BIOS data area might not have been initialized in that case.) This change also means that there are now a few more fields in the `struct mman`. * [metal] VGA console can now show "screen of death" upon a crash There is now a new function _klog_vga(), which can be called by kprintf() to output system messages — e.g. information about CPU exceptions — on the VGA screen. * [metal] CPU exception handler now dumps cr2 value * [metal] Add demo of program crash reporting w/ bare metal VGA TTY * [metal] Reduce size of "screen of death" code
2022-10-06 12:36:15 +00:00
#undef KLOGTTY
#define MAYUNROLLLOOPS unrollloops
Run clang-format on most sources
2023-04-27 03:45:01 +00:00
#define COLOR TtyCanvasColor
#define BPP 32
#define MAPCOLOR TtyGraphMapColor
#define DIRTY TtyGraphDirty
Show "screen of death" on VGA console upon program crash (#650) * [metal] Refactoring: separate out sys_writev_vga() and _vga_init() modules * [metal] Read VGA info from BDA before long mode entry, not after If using a pre-existing VGA text console, the VGA initialization code now retrieves the cursor position & character height from the BIOS data area while still in real mode — rather than reading from the BIOS data area only after entering long mode. (This should help make the code more correct, if Cosmopolitan were to support UEFI graphics output in the future. If the program were booted via UEFI, then the long mode IsMetal() code would still be activated, but the BIOS data area might not have been initialized in that case.) This change also means that there are now a few more fields in the `struct mman`. * [metal] VGA console can now show "screen of death" upon a crash There is now a new function _klog_vga(), which can be called by kprintf() to output system messages — e.g. information about CPU exceptions — on the VGA screen. * [metal] CPU exception handler now dumps cr2 value * [metal] Add demo of program crash reporting w/ bare metal VGA TTY * [metal] Reduce size of "screen of death" code
2022-10-06 12:36:15 +00:00
#undef UPDATE
#define RESETDIRTY TtyGraphResetDirty
#define DRAWBITMAP TtyGraphDrawBitmap
#define FILLRECT TtyGraphFillRect
#define MOVERECT TtyGraphMoveRect
#define DRAWCHAR _TtyGraphDrawChar
#define ERASELINECELLS _TtyGraphEraseLineCells
#define MOVELINECELLS _TtyGraphMoveLineCells
#include "libc/vga/tty-graph.inc"
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