diff --git a/paw/stos/xt/flanterm/.gitignore b/paw/stos/xt/flanterm/.gitignore new file mode 100644 index 0000000..cc62e43 --- /dev/null +++ b/paw/stos/xt/flanterm/.gitignore @@ -0,0 +1,2 @@ +*.d +*.o \ No newline at end of file diff --git a/paw/stos/xt/flanterm/LICENSE b/paw/stos/xt/flanterm/LICENSE new file mode 100644 index 0000000..e18db68 --- /dev/null +++ b/paw/stos/xt/flanterm/LICENSE @@ -0,0 +1,22 @@ +Copyright (C) 2022-2026 Mintsuki and contributors. + +Redistribution and use in source and binary forms, with or without +modification, are permitted provided that the following conditions are met: + +1. Redistributions of source code must retain the above copyright notice, this + list of conditions and the following disclaimer. + +2. Redistributions in binary form must reproduce the above copyright notice, + this list of conditions and the following disclaimer in the documentation + and/or other materials provided with the distribution. + +THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND +ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED +WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE +DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE +FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL +DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR +SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER +CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, +OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. diff --git a/paw/stos/xt/flanterm/README.md b/paw/stos/xt/flanterm/README.md new file mode 100644 index 0000000..f392efc --- /dev/null +++ b/paw/stos/xt/flanterm/README.md @@ -0,0 +1,43 @@ +# Flanterm + +Flanterm is a fast and reasonably complete terminal emulator with support for +multiple output backends. Included is a fast framebuffer backend. + +### Quick usage + +To quickly set up and use a framebuffer Flanterm instance, it is possible to +use the `flanterm_fb_init()` function as such: +```c +#include +#include + +struct flanterm_context *ft_ctx = flanterm_fb_init( + NULL, + NULL, + framebuffer_ptr, width, height, pitch, + red_mask_size, red_mask_shift, + green_mask_size, green_mask_shift, + blue_mask_size, blue_mask_shift, + NULL, + NULL, NULL, + NULL, NULL, + NULL, NULL, + NULL, 0, 0, 1, + 0, 0, + 0 + ); +``` +Where `framebuffer_ptr, width, height, pitch` and `{red,green,blue}_mask_{size,shift}` +represent the corresponding info about the framebuffer to use for this given instance. + +The meaning of the other arguments can be found in `flanterm_backends/fb.h`. + +To then print to the terminal instance, simply use the `flanterm_write()` +function on the given instance. For example: +```c +#include + +const char msg[] = "Hello world\n"; + +flanterm_write(ft_ctx, msg, sizeof(msg)); +``` diff --git a/paw/stos/xt/flanterm/src/flanterm.c b/paw/stos/xt/flanterm/src/flanterm.c new file mode 100644 index 0000000..9fa489b --- /dev/null +++ b/paw/stos/xt/flanterm/src/flanterm.c @@ -0,0 +1,1424 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/* Copyright (C) 2022-2026 Mintsuki and contributors. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifdef __cplusplus +#error "Please do not compile Flanterm as C++ code! Flanterm should be compiled as C99 or newer." +#endif + +#ifndef __STDC_VERSION__ +#error "Flanterm must be compiled as C99 or newer." +#endif + +#include + +#ifndef FLANTERM_IN_FLANTERM +#define FLANTERM_IN_FLANTERM +#endif + +#include "flanterm.h" + +// Tries to implement this standard for terminfo +// https://man7.org/linux/man-pages/man4/console_codes.4.html + +static const ULONG col256[] = { + 0x000000, 0x00005f, 0x000087, 0x0000af, 0x0000d7, 0x0000ff, 0x005f00, 0x005f5f, + 0x005f87, 0x005faf, 0x005fd7, 0x005fff, 0x008700, 0x00875f, 0x008787, 0x0087af, + 0x0087d7, 0x0087ff, 0x00af00, 0x00af5f, 0x00af87, 0x00afaf, 0x00afd7, 0x00afff, + 0x00d700, 0x00d75f, 0x00d787, 0x00d7af, 0x00d7d7, 0x00d7ff, 0x00ff00, 0x00ff5f, + 0x00ff87, 0x00ffaf, 0x00ffd7, 0x00ffff, 0x5f0000, 0x5f005f, 0x5f0087, 0x5f00af, + 0x5f00d7, 0x5f00ff, 0x5f5f00, 0x5f5f5f, 0x5f5f87, 0x5f5faf, 0x5f5fd7, 0x5f5fff, + 0x5f8700, 0x5f875f, 0x5f8787, 0x5f87af, 0x5f87d7, 0x5f87ff, 0x5faf00, 0x5faf5f, + 0x5faf87, 0x5fafaf, 0x5fafd7, 0x5fafff, 0x5fd700, 0x5fd75f, 0x5fd787, 0x5fd7af, + 0x5fd7d7, 0x5fd7ff, 0x5fff00, 0x5fff5f, 0x5fff87, 0x5fffaf, 0x5fffd7, 0x5fffff, + 0x870000, 0x87005f, 0x870087, 0x8700af, 0x8700d7, 0x8700ff, 0x875f00, 0x875f5f, + 0x875f87, 0x875faf, 0x875fd7, 0x875fff, 0x878700, 0x87875f, 0x878787, 0x8787af, + 0x8787d7, 0x8787ff, 0x87af00, 0x87af5f, 0x87af87, 0x87afaf, 0x87afd7, 0x87afff, + 0x87d700, 0x87d75f, 0x87d787, 0x87d7af, 0x87d7d7, 0x87d7ff, 0x87ff00, 0x87ff5f, + 0x87ff87, 0x87ffaf, 0x87ffd7, 0x87ffff, 0xaf0000, 0xaf005f, 0xaf0087, 0xaf00af, + 0xaf00d7, 0xaf00ff, 0xaf5f00, 0xaf5f5f, 0xaf5f87, 0xaf5faf, 0xaf5fd7, 0xaf5fff, + 0xaf8700, 0xaf875f, 0xaf8787, 0xaf87af, 0xaf87d7, 0xaf87ff, 0xafaf00, 0xafaf5f, + 0xafaf87, 0xafafaf, 0xafafd7, 0xafafff, 0xafd700, 0xafd75f, 0xafd787, 0xafd7af, + 0xafd7d7, 0xafd7ff, 0xafff00, 0xafff5f, 0xafff87, 0xafffaf, 0xafffd7, 0xafffff, + 0xd70000, 0xd7005f, 0xd70087, 0xd700af, 0xd700d7, 0xd700ff, 0xd75f00, 0xd75f5f, + 0xd75f87, 0xd75faf, 0xd75fd7, 0xd75fff, 0xd78700, 0xd7875f, 0xd78787, 0xd787af, + 0xd787d7, 0xd787ff, 0xd7af00, 0xd7af5f, 0xd7af87, 0xd7afaf, 0xd7afd7, 0xd7afff, + 0xd7d700, 0xd7d75f, 0xd7d787, 0xd7d7af, 0xd7d7d7, 0xd7d7ff, 0xd7ff00, 0xd7ff5f, + 0xd7ff87, 0xd7ffaf, 0xd7ffd7, 0xd7ffff, 0xff0000, 0xff005f, 0xff0087, 0xff00af, + 0xff00d7, 0xff00ff, 0xff5f00, 0xff5f5f, 0xff5f87, 0xff5faf, 0xff5fd7, 0xff5fff, + 0xff8700, 0xff875f, 0xff8787, 0xff87af, 0xff87d7, 0xff87ff, 0xffaf00, 0xffaf5f, + 0xffaf87, 0xffafaf, 0xffafd7, 0xffafff, 0xffd700, 0xffd75f, 0xffd787, 0xffd7af, + 0xffd7d7, 0xffd7ff, 0xffff00, 0xffff5f, 0xffff87, 0xffffaf, 0xffffd7, 0xffffff, + 0x080808, 0x121212, 0x1c1c1c, 0x262626, 0x303030, 0x3a3a3a, 0x444444, 0x4e4e4e, + 0x585858, 0x626262, 0x6c6c6c, 0x767676, 0x808080, 0x8a8a8a, 0x949494, 0x9e9e9e, + 0xa8a8a8, 0xb2b2b2, 0xbcbcbc, 0xc6c6c6, 0xd0d0d0, 0xdadada, 0xe4e4e4, 0xeeeeee +}; + +#define CHARSET_DEFAULT 0 +#define CHARSET_DEC_SPECIAL 1 + +void flanterm_context_reinit(struct flanterm_context *ctx) { + ctx->tab_size = 8; + ctx->autoflush = true; + ctx->cursor_enabled = true; + ctx->scroll_enabled = true; + ctx->control_sequence = false; + ctx->escape = false; + ctx->osc = false; + ctx->osc_escape = false; + ctx->rrr = false; + ctx->discard_next = false; + ctx->bold = false; + ctx->bg_bold = false; + ctx->reverse_video = false; + ctx->dec_private = false; + ctx->insert_mode = false; + ctx->csi_unhandled = false; + ctx->unicode_remaining = 0; + ctx->g_select = 0; + ctx->charsets[0] = CHARSET_DEFAULT; + ctx->charsets[1] = CHARSET_DEC_SPECIAL; + ctx->current_charset = 0; + ctx->escape_offset = 0; + ctx->esc_values_i = 0; + ctx->saved_cursor_x = 0; + ctx->saved_cursor_y = 0; + ctx->current_primary = (USIZE)-1; + ctx->current_bg = (USIZE)-1; + ctx->scroll_top_margin = 0; + ctx->scroll_bottom_margin = ctx->rows; + ctx->oob_output = FLANTERM_OOB_OUTPUT_ONLCR; +} + +static void flanterm_putchar(struct flanterm_context *ctx, UCHAR c); + +void flanterm_write(struct flanterm_context *ctx, const char *buf, USIZE count) { + for (USIZE i = 0; i < count; i++) { + flanterm_putchar(ctx, buf[i]); + } + + if (ctx->autoflush) { + ctx->double_buffer_flush(ctx); + } +} + +static void sgr(struct flanterm_context *ctx) { + USIZE i = 0; + + if (!ctx->esc_values_i) + goto def; + + for (; i < ctx->esc_values_i; i++) { + USIZE offset; + + if (ctx->esc_values[i] == 0) { +def: + if (ctx->reverse_video) { + ctx->reverse_video = false; + ctx->swap_palette(ctx); + } + ctx->bold = false; + ctx->bg_bold = false; + ctx->current_primary = (USIZE)-1; + ctx->current_bg = (USIZE)-1; + ctx->set_text_bg_default(ctx); + ctx->set_text_fg_default(ctx); + continue; + } + + else if (ctx->esc_values[i] == 1) { + ctx->bold = true; + if (ctx->current_primary != (USIZE)-1) { + if (!ctx->reverse_video) { + ctx->set_text_fg_bright(ctx, ctx->current_primary); + } else { + ctx->set_text_bg_bright(ctx, ctx->current_primary); + } + } else { + if (!ctx->reverse_video) { + ctx->set_text_fg_default_bright(ctx); + } else { + ctx->set_text_bg_default_bright(ctx); + } + } + continue; + } + + else if (ctx->esc_values[i] == 5) { + ctx->bg_bold = true; + if (ctx->current_bg != (USIZE)-1) { + if (!ctx->reverse_video) { + ctx->set_text_bg_bright(ctx, ctx->current_bg); + } else { + ctx->set_text_fg_bright(ctx, ctx->current_bg); + } + } else { + if (!ctx->reverse_video) { + ctx->set_text_bg_default_bright(ctx); + } else { + ctx->set_text_fg_default_bright(ctx); + } + } + continue; + } + + else if (ctx->esc_values[i] == 22) { + ctx->bold = false; + if (ctx->current_primary != (USIZE)-1) { + if (!ctx->reverse_video) { + ctx->set_text_fg(ctx, ctx->current_primary); + } else { + ctx->set_text_bg(ctx, ctx->current_primary); + } + } else { + if (!ctx->reverse_video) { + ctx->set_text_fg_default(ctx); + } else { + ctx->set_text_bg_default(ctx); + } + } + continue; + } + + else if (ctx->esc_values[i] == 25) { + ctx->bg_bold = false; + if (ctx->current_bg != (USIZE)-1) { + if (!ctx->reverse_video) { + ctx->set_text_bg(ctx, ctx->current_bg); + } else { + ctx->set_text_fg(ctx, ctx->current_bg); + } + } else { + if (!ctx->reverse_video) { + ctx->set_text_bg_default(ctx); + } else { + ctx->set_text_fg_default(ctx); + } + } + continue; + } + + else if (ctx->esc_values[i] >= 30 && ctx->esc_values[i] <= 37) { + offset = 30; + ctx->current_primary = ctx->esc_values[i] - offset; + + if (ctx->reverse_video) { + goto set_bg; + } + +set_fg: + if ((ctx->bold && !ctx->reverse_video) + || (ctx->bg_bold && ctx->reverse_video)) { + ctx->set_text_fg_bright(ctx, ctx->esc_values[i] - offset); + } else { + ctx->set_text_fg(ctx, ctx->esc_values[i] - offset); + } + continue; + } + + else if (ctx->esc_values[i] >= 40 && ctx->esc_values[i] <= 47) { + offset = 40; + ctx->current_bg = ctx->esc_values[i] - offset; + + if (ctx->reverse_video) { + goto set_fg; + } + +set_bg: + if ((ctx->bold && ctx->reverse_video) + || (ctx->bg_bold && !ctx->reverse_video)) { + ctx->set_text_bg_bright(ctx, ctx->esc_values[i] - offset); + } else { + ctx->set_text_bg(ctx, ctx->esc_values[i] - offset); + } + continue; + } + + else if (ctx->esc_values[i] >= 90 && ctx->esc_values[i] <= 97) { + offset = 90; + ctx->current_primary = ctx->esc_values[i] - offset; + + if (ctx->reverse_video) { + goto set_bg_bright; + } + +set_fg_bright: + ctx->set_text_fg_bright(ctx, ctx->esc_values[i] - offset); + continue; + } + + else if (ctx->esc_values[i] >= 100 && ctx->esc_values[i] <= 107) { + offset = 100; + ctx->current_bg = ctx->esc_values[i] - offset; + + if (ctx->reverse_video) { + goto set_fg_bright; + } + +set_bg_bright: + ctx->set_text_bg_bright(ctx, ctx->esc_values[i] - offset); + continue; + } + + else if (ctx->esc_values[i] == 39) { + ctx->current_primary = (USIZE)-1; + + if (ctx->reverse_video) { + ctx->swap_palette(ctx); + } + + if (!ctx->bold) { + ctx->set_text_fg_default(ctx); + } else { + ctx->set_text_fg_default_bright(ctx); + } + + if (ctx->reverse_video) { + ctx->swap_palette(ctx); + } + + continue; + } + + else if (ctx->esc_values[i] == 49) { + ctx->current_bg = (USIZE)-1; + + if (ctx->reverse_video) { + ctx->swap_palette(ctx); + } + + if (!ctx->bg_bold) { + ctx->set_text_bg_default(ctx); + } else { + ctx->set_text_bg_default_bright(ctx); + } + + if (ctx->reverse_video) { + ctx->swap_palette(ctx); + } + + continue; + } + + else if (ctx->esc_values[i] == 7) { + if (!ctx->reverse_video) { + ctx->reverse_video = true; + ctx->swap_palette(ctx); + } + continue; + } + + else if (ctx->esc_values[i] == 27) { + if (ctx->reverse_video) { + ctx->reverse_video = false; + ctx->swap_palette(ctx); + } + continue; + } + + // 256/RGB + else if (ctx->esc_values[i] == 38 || ctx->esc_values[i] == 48) { + bool fg = ctx->esc_values[i] == 38; + + i++; + if (i >= ctx->esc_values_i) { + break; + } + + switch (ctx->esc_values[i]) { + case 2: { // RGB + if (i + 3 >= ctx->esc_values_i) { + goto out; + } + + ULONG rgb_value = 0; + + rgb_value |= ctx->esc_values[i + 1] << 16; + rgb_value |= ctx->esc_values[i + 2] << 8; + rgb_value |= ctx->esc_values[i + 3]; + + i += 3; + + (fg ? ctx->set_text_fg_rgb : ctx->set_text_bg_rgb)(ctx, rgb_value); + + break; + } + case 5: { // 256 colors + if (i + 1 >= ctx->esc_values_i) { + goto out; + } + + ULONG col = ctx->esc_values[i + 1]; + + i++; + + if (col < 8) { + (fg ? ctx->set_text_fg : ctx->set_text_bg)(ctx, col); + } else if (col < 16) { + (fg ? ctx->set_text_fg_bright : ctx->set_text_bg_bright)(ctx, col - 8); + } else if (col < 256) { + ULONG rgb_value = col256[col - 16]; + (fg ? ctx->set_text_fg_rgb : ctx->set_text_bg_rgb)(ctx, rgb_value); + } + + break; + } + default: continue; + } + } + } + +out:; +} + +static void dec_private_parse(struct flanterm_context *ctx, UCHAR c) { + ctx->dec_private = false; + + if (ctx->esc_values_i == 0) { + return; + } + + bool set; + + switch (c) { + case 'h': + set = true; break; + case 'l': + set = false; break; + default: + return; + } + + switch (ctx->esc_values[0]) { + case 25: { + if (set) { + ctx->cursor_enabled = true; + } else { + ctx->cursor_enabled = false; + } + return; + } + } + + if (ctx->callback != NULL) { + ctx->callback(ctx, FLANTERM_CB_DEC, ctx->esc_values_i, (UPTR)ctx->esc_values, c); + } +} + +static void linux_private_parse(struct flanterm_context *ctx) { + if (ctx->esc_values_i == 0) { + return; + } + + if (ctx->callback != NULL) { + ctx->callback(ctx, FLANTERM_CB_LINUX, ctx->esc_values_i, (UPTR)ctx->esc_values, 0); + } +} + +static void mode_toggle(struct flanterm_context *ctx, UCHAR c) { + if (ctx->esc_values_i == 0) { + return; + } + + bool set; + + switch (c) { + case 'h': + set = true; break; + case 'l': + set = false; break; + default: + return; + } + + switch (ctx->esc_values[0]) { + case 4: + ctx->insert_mode = set; return; + } + + if (ctx->callback != NULL) { + ctx->callback(ctx, FLANTERM_CB_MODE, ctx->esc_values_i, (UPTR)ctx->esc_values, c); + } +} + +static bool osc_parse(struct flanterm_context *ctx, UCHAR c) { + // ESC \ terminates an OSC sequence cleanly + // but if ESC is followed by non-\, report failure from osc_parse and + // try parsing the character as another escape code + if (ctx->osc_escape) { + if (c == '\\') { + ctx->osc = false; + ctx->osc_escape = false; + ctx->escape = false; + return true; + } else { + ctx->osc_escape = false; + ctx->osc = false; + // escape stays true here + return false; + } + } + switch (c) { + case 0x1b: + ctx->osc_escape = true; + break; + // BEL is the other terminator + case '\a': + ctx->osc_escape = false; + ctx->osc = false; + ctx->escape = false; + break; + default: + break; + } + return true; +} + +static void control_sequence_parse(struct flanterm_context *ctx, UCHAR c) { + if (ctx->escape_offset == 2) { + switch (c) { + case '[': + ctx->discard_next = true; + goto cleanup; + case '?': + ctx->dec_private = true; + return; + } + } + + if (c >= '0' && c <= '9') { + if (ctx->esc_values_i == FLANTERM_MAX_ESC_VALUES) { + return; + } + ctx->rrr = true; + ctx->esc_values[ctx->esc_values_i] *= 10; + ctx->esc_values[ctx->esc_values_i] += c - '0'; + return; + } + + if (ctx->rrr == true) { + ctx->esc_values_i++; + ctx->rrr = false; + if (c == ';') + return; + } else if (c == ';') { + if (ctx->esc_values_i == FLANTERM_MAX_ESC_VALUES) { + return; + } + ctx->esc_values[ctx->esc_values_i] = 0; + ctx->esc_values_i++; + return; + } + + USIZE esc_default; + switch (c) { + case 'J': case 'K': case 'q': + esc_default = 0; break; + default: + esc_default = 1; break; + } + + for (USIZE i = ctx->esc_values_i; i < FLANTERM_MAX_ESC_VALUES; i++) { + ctx->esc_values[i] = esc_default; + } + + if (ctx->dec_private == true) { + dec_private_parse(ctx, c); + goto cleanup; + } + + bool r = ctx->scroll_enabled; + ctx->scroll_enabled = false; + USIZE x, y; + ctx->get_cursor_pos(ctx, &x, &y); + + // CSI sequences are terminated by a byte in [0x40,0x7E] + // so skip all bytes until the terminator byte + if (ctx->csi_unhandled) { + if (c >= 0x40 && c <= 0x7E) { + ctx->csi_unhandled = false; + goto cleanup; + } + return; + } + + switch (c) { + // Got ESC in the middle of an escape sequence, start a new one + case 0x1B: + return; + case 'F': + x = 0; + // FALLTHRU + case 'A': { + if (ctx->esc_values[0] > y) + ctx->esc_values[0] = y; + USIZE orig_y = y; + USIZE dest_y = y - ctx->esc_values[0]; + bool will_be_in_scroll_region = false; + if ((ctx->scroll_top_margin >= dest_y && ctx->scroll_top_margin <= orig_y) + || (ctx->scroll_bottom_margin >= dest_y && ctx->scroll_bottom_margin <= orig_y)) { + will_be_in_scroll_region = true; + } + if (will_be_in_scroll_region && dest_y < ctx->scroll_top_margin) { + dest_y = ctx->scroll_top_margin; + } + ctx->set_cursor_pos(ctx, x, dest_y); + break; + } + case 'E': + x = 0; + // FALLTHRU + case 'e': + case 'B': { + if (y + ctx->esc_values[0] > ctx->rows - 1) + ctx->esc_values[0] = (ctx->rows - 1) - y; + USIZE orig_y = y; + USIZE dest_y = y + ctx->esc_values[0]; + bool will_be_in_scroll_region = false; + if ((ctx->scroll_top_margin >= orig_y && ctx->scroll_top_margin <= dest_y) + || (ctx->scroll_bottom_margin >= orig_y && ctx->scroll_bottom_margin <= dest_y)) { + will_be_in_scroll_region = true; + } + if (will_be_in_scroll_region && dest_y >= ctx->scroll_bottom_margin) { + dest_y = ctx->scroll_bottom_margin - 1; + } + ctx->set_cursor_pos(ctx, x, dest_y); + break; + } + case 'a': + case 'C': + if (x + ctx->esc_values[0] > ctx->cols - 1) + ctx->esc_values[0] = (ctx->cols - 1) - x; + ctx->set_cursor_pos(ctx, x + ctx->esc_values[0], y); + break; + case 'D': + if (ctx->esc_values[0] > x) + ctx->esc_values[0] = x; + ctx->set_cursor_pos(ctx, x - ctx->esc_values[0], y); + break; + case 'c': + if (ctx->callback != NULL) { + ctx->callback(ctx, FLANTERM_CB_PRIVATE_ID, 0, 0, 0); + } + break; + case 'd': + ctx->esc_values[0] -= 1; + if (ctx->esc_values[0] >= ctx->rows) + ctx->esc_values[0] = ctx->rows - 1; + ctx->set_cursor_pos(ctx, x, ctx->esc_values[0]); + break; + case 'G': + case '`': + ctx->esc_values[0] -= 1; + if (ctx->esc_values[0] >= ctx->cols) + ctx->esc_values[0] = ctx->cols - 1; + ctx->set_cursor_pos(ctx, ctx->esc_values[0], y); + break; + case 'H': + case 'f': + if (ctx->esc_values[0] != 0) { + ctx->esc_values[0]--; + } + if (ctx->esc_values[1] != 0) { + ctx->esc_values[1]--; + } + if (ctx->esc_values[1] >= ctx->cols) + ctx->esc_values[1] = ctx->cols - 1; + if (ctx->esc_values[0] >= ctx->rows) + ctx->esc_values[0] = ctx->rows - 1; + ctx->set_cursor_pos(ctx, ctx->esc_values[1], ctx->esc_values[0]); + break; + case 'M': { + USIZE count = ctx->esc_values[0] > ctx->rows ? ctx->rows : ctx->esc_values[0]; + for (USIZE i = 0; i < count; i++) { + ctx->scroll(ctx); + } + break; + } + case 'L': { + USIZE old_scroll_top_margin = ctx->scroll_top_margin; + ctx->scroll_top_margin = y; + USIZE count = ctx->esc_values[0] > ctx->rows ? ctx->rows : ctx->esc_values[0]; + for (USIZE i = 0; i < count; i++) { + ctx->revscroll(ctx); + } + ctx->scroll_top_margin = old_scroll_top_margin; + break; + } + case 'n': + switch (ctx->esc_values[0]) { + case 5: + if (ctx->callback != NULL) { + ctx->callback(ctx, FLANTERM_CB_STATUS_REPORT, 0, 0, 0); + } + break; + case 6: + if (ctx->callback != NULL) { + ctx->callback(ctx, FLANTERM_CB_POS_REPORT, x + 1, y + 1, 0); + } + break; + } + break; + case 'q': + if (ctx->callback != NULL) { + ctx->callback(ctx, FLANTERM_CB_KBD_LEDS, ctx->esc_values[0], 0, 0); + } + break; + case 'J': + switch (ctx->esc_values[0]) { + case 0: { + USIZE rows_remaining = ctx->rows - (y + 1); + USIZE cols_diff = ctx->cols - (x + 1); + USIZE to_clear = rows_remaining * ctx->cols + cols_diff + 1; + for (USIZE i = 0; i < to_clear; i++) { + ctx->raw_putchar(ctx, ' '); + } + ctx->set_cursor_pos(ctx, x, y); + break; + } + case 1: { + ctx->set_cursor_pos(ctx, 0, 0); + bool b = false; + for (USIZE yc = 0; yc < ctx->rows; yc++) { + for (USIZE xc = 0; xc < ctx->cols; xc++) { + ctx->raw_putchar(ctx, ' '); + if (xc == x && yc == y) { + ctx->set_cursor_pos(ctx, x, y); + b = true; + break; + } + } + if (b == true) + break; + } + break; + } + case 2: + case 3: + ctx->clear(ctx, false); + break; + } + break; + case '@': + for (USIZE i = ctx->cols - 1; ; i--) { + ctx->move_character(ctx, i + ctx->esc_values[0], y, i, y); + ctx->set_cursor_pos(ctx, i, y); + ctx->raw_putchar(ctx, ' '); + if (i == x) { + break; + } + } + ctx->set_cursor_pos(ctx, x, y); + break; + case 'P': + for (USIZE i = x + ctx->esc_values[0]; i < ctx->cols; i++) + ctx->move_character(ctx, i - ctx->esc_values[0], y, i, y); + ctx->set_cursor_pos(ctx, ctx->cols - ctx->esc_values[0], y); + // FALLTHRU + case 'X': { + USIZE count = ctx->esc_values[0] > ctx->cols ? ctx->cols : ctx->esc_values[0]; + for (USIZE i = 0; i < count; i++) + ctx->raw_putchar(ctx, ' '); + ctx->set_cursor_pos(ctx, x, y); + break; + } + case 'm': + sgr(ctx); + break; + case 's': + ctx->get_cursor_pos(ctx, &ctx->saved_cursor_x, &ctx->saved_cursor_y); + break; + case 'u': + ctx->set_cursor_pos(ctx, ctx->saved_cursor_x, ctx->saved_cursor_y); + break; + case 'K': + switch (ctx->esc_values[0]) { + case 0: { + for (USIZE i = x; i < ctx->cols; i++) + ctx->raw_putchar(ctx, ' '); + ctx->set_cursor_pos(ctx, x, y); + break; + } + case 1: { + ctx->set_cursor_pos(ctx, 0, y); + for (USIZE i = 0; i < x; i++) + ctx->raw_putchar(ctx, ' '); + break; + } + case 2: { + ctx->set_cursor_pos(ctx, 0, y); + for (USIZE i = 0; i < ctx->cols; i++) + ctx->raw_putchar(ctx, ' '); + ctx->set_cursor_pos(ctx, x, y); + break; + } + } + break; + case 'r': + if (ctx->esc_values[0] == 0) { + ctx->esc_values[0] = 1; + } + if (ctx->esc_values[1] == 0) { + ctx->esc_values[1] = 1; + } + ctx->scroll_top_margin = 0; + ctx->scroll_bottom_margin = ctx->rows; + if (ctx->esc_values_i > 0) { + ctx->scroll_top_margin = ctx->esc_values[0] - 1; + } + if (ctx->esc_values_i > 1) { + ctx->scroll_bottom_margin = ctx->esc_values[1]; + } + if (ctx->scroll_top_margin >= ctx->rows + || ctx->scroll_bottom_margin > ctx->rows + || ctx->scroll_top_margin >= (ctx->scroll_bottom_margin - 1)) { + ctx->scroll_top_margin = 0; + ctx->scroll_bottom_margin = ctx->rows; + } + ctx->set_cursor_pos(ctx, 0, 0); + break; + case 'l': + case 'h': + mode_toggle(ctx, c); + break; + case ']': + linux_private_parse(ctx); + break; + default: + ctx->csi_unhandled = true; + return; + } + + ctx->scroll_enabled = r; + +cleanup: + ctx->control_sequence = false; + ctx->escape = false; +} + +static void restore_state(struct flanterm_context *ctx) { + ctx->bold = ctx->saved_state_bold; + ctx->bg_bold = ctx->saved_state_bg_bold; + ctx->reverse_video = ctx->saved_state_reverse_video; + ctx->current_charset = ctx->saved_state_current_charset; + ctx->current_primary = ctx->saved_state_current_primary; + ctx->current_bg = ctx->saved_state_current_bg; + + ctx->restore_state(ctx); +} + +static void save_state(struct flanterm_context *ctx) { + ctx->save_state(ctx); + + ctx->saved_state_bold = ctx->bold; + ctx->saved_state_bg_bold = ctx->bg_bold; + ctx->saved_state_reverse_video = ctx->reverse_video; + ctx->saved_state_current_charset = ctx->current_charset; + ctx->saved_state_current_primary = ctx->current_primary; + ctx->saved_state_current_bg = ctx->current_bg; +} + +static void escape_parse(struct flanterm_context *ctx, UCHAR c) { + ctx->escape_offset++; + + if (ctx->osc == true) { + // ESC \ is one of the two possible terminators of OSC sequences, + // so osc_parse consumes ESC. + // If it is then followed by \ it cleans correctly, + // otherwise it returns false, and it tries parsing it as another escape sequence + if (osc_parse(ctx, c)) { + return; + } + } + + if (ctx->control_sequence == true) { + control_sequence_parse(ctx, c); + return; + } + + USIZE x, y; + ctx->get_cursor_pos(ctx, &x, &y); + + switch (c) { + case ']': + ctx->osc_escape = false; + ctx->osc = true; + return; + case '[': + for (USIZE i = 0; i < FLANTERM_MAX_ESC_VALUES; i++) + ctx->esc_values[i] = 0; + ctx->esc_values_i = 0; + ctx->rrr = false; + ctx->csi_unhandled = false; + ctx->control_sequence = true; + return; + case '7': + save_state(ctx); + break; + case '8': + restore_state(ctx); + break; + case 'c': + flanterm_context_reinit(ctx); + ctx->clear(ctx, true); + break; + case 'D': + if (y == ctx->scroll_bottom_margin - 1) { + ctx->scroll(ctx); + ctx->set_cursor_pos(ctx, x, y); + } else { + ctx->set_cursor_pos(ctx, x, y + 1); + } + break; + case 'E': + if (y == ctx->scroll_bottom_margin - 1) { + ctx->scroll(ctx); + ctx->set_cursor_pos(ctx, 0, y); + } else { + ctx->set_cursor_pos(ctx, 0, y + 1); + } + break; + case 'M': + // "Reverse linefeed" + if (y == ctx->scroll_top_margin) { + ctx->revscroll(ctx); + ctx->set_cursor_pos(ctx, 0, y); + } else { + ctx->set_cursor_pos(ctx, 0, y - 1); + } + break; + case 'Z': + if (ctx->callback != NULL) { + ctx->callback(ctx, FLANTERM_CB_PRIVATE_ID, 0, 0, 0); + } + break; + case '(': + case ')': + ctx->g_select = c - '\''; + break; + } + + ctx->escape = false; +} + +static bool dec_special_print(struct flanterm_context *ctx, UCHAR c) { +#define FLANTERM_DEC_SPCL_PRN(C) ctx->raw_putchar(ctx, (C)); return true; + switch (c) { + case '`': FLANTERM_DEC_SPCL_PRN(0x04) + case '0': FLANTERM_DEC_SPCL_PRN(0xdb) + case '-': FLANTERM_DEC_SPCL_PRN(0x18) + case ',': FLANTERM_DEC_SPCL_PRN(0x1b) + case '.': FLANTERM_DEC_SPCL_PRN(0x19) + case 'a': FLANTERM_DEC_SPCL_PRN(0xb1) + case 'f': FLANTERM_DEC_SPCL_PRN(0xf8) + case 'g': FLANTERM_DEC_SPCL_PRN(0xf1) + case 'h': FLANTERM_DEC_SPCL_PRN(0xb0) + case 'j': FLANTERM_DEC_SPCL_PRN(0xd9) + case 'k': FLANTERM_DEC_SPCL_PRN(0xbf) + case 'l': FLANTERM_DEC_SPCL_PRN(0xda) + case 'm': FLANTERM_DEC_SPCL_PRN(0xc0) + case 'n': FLANTERM_DEC_SPCL_PRN(0xc5) + case 'q': FLANTERM_DEC_SPCL_PRN(0xc4) + case 's': FLANTERM_DEC_SPCL_PRN(0x5f) + case 't': FLANTERM_DEC_SPCL_PRN(0xc3) + case 'u': FLANTERM_DEC_SPCL_PRN(0xb4) + case 'v': FLANTERM_DEC_SPCL_PRN(0xc1) + case 'w': FLANTERM_DEC_SPCL_PRN(0xc2) + case 'x': FLANTERM_DEC_SPCL_PRN(0xb3) + case 'y': FLANTERM_DEC_SPCL_PRN(0xf3) + case 'z': FLANTERM_DEC_SPCL_PRN(0xf2) + case '~': FLANTERM_DEC_SPCL_PRN(0xfa) + case '_': FLANTERM_DEC_SPCL_PRN(0xff) + case '+': FLANTERM_DEC_SPCL_PRN(0x1a) + case '{': FLANTERM_DEC_SPCL_PRN(0xe3) + case '}': FLANTERM_DEC_SPCL_PRN(0x9c) + } +#undef FLANTERM_DEC_SPCL_PRN + + return false; +} + +// Following wcwidth related code inherited from: +// https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c + +struct interval { + ULONG first; + ULONG last; +}; + +/* auxiliary function for binary search in interval table */ +static int bisearch(ULONG ucs, const struct interval *table, int max) { + int min = 0; + int mid; + + if (ucs < table[0].first || ucs > table[max].last) + return 0; + while (max >= min) { + mid = (min + max) / 2; + if (ucs > table[mid].last) + min = mid + 1; + else if (ucs < table[mid].first) + max = mid - 1; + else + return 1; + } + + return 0; +} + +int mk_wcwidth(ULONG ucs) { + /* sorted list of non-overlapping intervals of non-spacing characters */ + /* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */ + static const struct interval combining[] = { + { 0x0300, 0x036F }, { 0x0483, 0x0486 }, { 0x0488, 0x0489 }, + { 0x0591, 0x05BD }, { 0x05BF, 0x05BF }, { 0x05C1, 0x05C2 }, + { 0x05C4, 0x05C5 }, { 0x05C7, 0x05C7 }, { 0x0600, 0x0603 }, + { 0x0610, 0x0615 }, { 0x064B, 0x065E }, { 0x0670, 0x0670 }, + { 0x06D6, 0x06E4 }, { 0x06E7, 0x06E8 }, { 0x06EA, 0x06ED }, + { 0x070F, 0x070F }, { 0x0711, 0x0711 }, { 0x0730, 0x074A }, + { 0x07A6, 0x07B0 }, { 0x07EB, 0x07F3 }, { 0x0901, 0x0902 }, + { 0x093C, 0x093C }, { 0x0941, 0x0948 }, { 0x094D, 0x094D }, + { 0x0951, 0x0954 }, { 0x0962, 0x0963 }, { 0x0981, 0x0981 }, + { 0x09BC, 0x09BC }, { 0x09C1, 0x09C4 }, { 0x09CD, 0x09CD }, + { 0x09E2, 0x09E3 }, { 0x0A01, 0x0A02 }, { 0x0A3C, 0x0A3C }, + { 0x0A41, 0x0A42 }, { 0x0A47, 0x0A48 }, { 0x0A4B, 0x0A4D }, + { 0x0A70, 0x0A71 }, { 0x0A81, 0x0A82 }, { 0x0ABC, 0x0ABC }, + { 0x0AC1, 0x0AC5 }, { 0x0AC7, 0x0AC8 }, { 0x0ACD, 0x0ACD }, + { 0x0AE2, 0x0AE3 }, { 0x0B01, 0x0B01 }, { 0x0B3C, 0x0B3C }, + { 0x0B3F, 0x0B3F }, { 0x0B41, 0x0B43 }, { 0x0B4D, 0x0B4D }, + { 0x0B56, 0x0B56 }, { 0x0B82, 0x0B82 }, { 0x0BC0, 0x0BC0 }, + { 0x0BCD, 0x0BCD }, { 0x0C3E, 0x0C40 }, { 0x0C46, 0x0C48 }, + { 0x0C4A, 0x0C4D }, { 0x0C55, 0x0C56 }, { 0x0CBC, 0x0CBC }, + { 0x0CBF, 0x0CBF }, { 0x0CC6, 0x0CC6 }, { 0x0CCC, 0x0CCD }, + { 0x0CE2, 0x0CE3 }, { 0x0D41, 0x0D43 }, { 0x0D4D, 0x0D4D }, + { 0x0DCA, 0x0DCA }, { 0x0DD2, 0x0DD4 }, { 0x0DD6, 0x0DD6 }, + { 0x0E31, 0x0E31 }, { 0x0E34, 0x0E3A }, { 0x0E47, 0x0E4E }, + { 0x0EB1, 0x0EB1 }, { 0x0EB4, 0x0EB9 }, { 0x0EBB, 0x0EBC }, + { 0x0EC8, 0x0ECD }, { 0x0F18, 0x0F19 }, { 0x0F35, 0x0F35 }, + { 0x0F37, 0x0F37 }, { 0x0F39, 0x0F39 }, { 0x0F71, 0x0F7E }, + { 0x0F80, 0x0F84 }, { 0x0F86, 0x0F87 }, { 0x0F90, 0x0F97 }, + { 0x0F99, 0x0FBC }, { 0x0FC6, 0x0FC6 }, { 0x102D, 0x1030 }, + { 0x1032, 0x1032 }, { 0x1036, 0x1037 }, { 0x1039, 0x1039 }, + { 0x1058, 0x1059 }, { 0x1160, 0x11FF }, { 0x135F, 0x135F }, + { 0x1712, 0x1714 }, { 0x1732, 0x1734 }, { 0x1752, 0x1753 }, + { 0x1772, 0x1773 }, { 0x17B4, 0x17B5 }, { 0x17B7, 0x17BD }, + { 0x17C6, 0x17C6 }, { 0x17C9, 0x17D3 }, { 0x17DD, 0x17DD }, + { 0x180B, 0x180D }, { 0x18A9, 0x18A9 }, { 0x1920, 0x1922 }, + { 0x1927, 0x1928 }, { 0x1932, 0x1932 }, { 0x1939, 0x193B }, + { 0x1A17, 0x1A18 }, { 0x1B00, 0x1B03 }, { 0x1B34, 0x1B34 }, + { 0x1B36, 0x1B3A }, { 0x1B3C, 0x1B3C }, { 0x1B42, 0x1B42 }, + { 0x1B6B, 0x1B73 }, { 0x1DC0, 0x1DCA }, { 0x1DFE, 0x1DFF }, + { 0x200B, 0x200F }, { 0x202A, 0x202E }, { 0x2060, 0x2063 }, + { 0x206A, 0x206F }, { 0x20D0, 0x20EF }, { 0x302A, 0x302F }, + { 0x3099, 0x309A }, { 0xA806, 0xA806 }, { 0xA80B, 0xA80B }, + { 0xA825, 0xA826 }, { 0xFB1E, 0xFB1E }, { 0xFE00, 0xFE0F }, + { 0xFE20, 0xFE23 }, { 0xFEFF, 0xFEFF }, { 0xFFF9, 0xFFFB }, + { 0x10A01, 0x10A03 }, { 0x10A05, 0x10A06 }, { 0x10A0C, 0x10A0F }, + { 0x10A38, 0x10A3A }, { 0x10A3F, 0x10A3F }, { 0x1D167, 0x1D169 }, + { 0x1D173, 0x1D182 }, { 0x1D185, 0x1D18B }, { 0x1D1AA, 0x1D1AD }, + { 0x1D242, 0x1D244 }, { 0xE0001, 0xE0001 }, { 0xE0020, 0xE007F }, + { 0xE0100, 0xE01EF } + }; + + /* test for 8-bit control characters */ + if (ucs == 0) + return 0; + if (ucs < 32 || (ucs >= 0x7f && ucs < 0xa0)) + return 1; + + /* binary search in table of non-spacing characters */ + if (bisearch(ucs, combining, + sizeof(combining) / sizeof(struct interval) - 1)) + return 0; + + /* if we arrive here, ucs is not a combining or C0/C1 control character */ + + return 1 + + (ucs >= 0x1100 && + (ucs <= 0x115f || /* Hangul Jamo init. consonants */ + ucs == 0x2329 || ucs == 0x232a || + (ucs >= 0x2e80 && ucs <= 0xa4cf && + ucs != 0x303f) || /* CJK ... Yi */ + (ucs >= 0xac00 && ucs <= 0xd7a3) || /* Hangul Syllables */ + (ucs >= 0xf900 && ucs <= 0xfaff) || /* CJK Compatibility Ideographs */ + (ucs >= 0xfe10 && ucs <= 0xfe19) || /* Vertical forms */ + (ucs >= 0xfe30 && ucs <= 0xfe6f) || /* CJK Compatibility Forms */ + (ucs >= 0xff00 && ucs <= 0xff60) || /* Fullwidth Forms */ + (ucs >= 0xffe0 && ucs <= 0xffe6) || + (ucs >= 0x20000 && ucs <= 0x2fffd) || + (ucs >= 0x30000 && ucs <= 0x3fffd))); +} + +// End of https://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c inherited code + +static int unicode_to_cp437(UQUAD code_point) { + switch (code_point) { + case 0x263a: return 1; + case 0x263b: return 2; + case 0x2665: return 3; + case 0x2666: return 4; + case 0x2663: return 5; + case 0x2660: return 6; + case 0x2022: return 7; + case 0x25d8: return 8; + case 0x25cb: return 9; + case 0x25d9: return 10; + case 0x2642: return 11; + case 0x2640: return 12; + case 0x266a: return 13; + case 0x266b: return 14; + case 0x263c: return 15; + case 0x25ba: return 16; + case 0x25c4: return 17; + case 0x2195: return 18; + case 0x203c: return 19; + case 0x00b6: return 20; + case 0x00a7: return 21; + case 0x25ac: return 22; + case 0x21a8: return 23; + case 0x2191: return 24; + case 0x2193: return 25; + case 0x2192: return 26; + case 0x2190: return 27; + case 0x221f: return 28; + case 0x2194: return 29; + case 0x25b2: return 30; + case 0x25bc: return 31; + + case 0x2302: return 127; + case 0x00c7: return 128; + case 0x00fc: return 129; + case 0x00e9: return 130; + case 0x00e2: return 131; + case 0x00e4: return 132; + case 0x00e0: return 133; + case 0x00e5: return 134; + case 0x00e7: return 135; + case 0x00ea: return 136; + case 0x00eb: return 137; + case 0x00e8: return 138; + case 0x00ef: return 139; + case 0x00ee: return 140; + case 0x00ec: return 141; + case 0x00c4: return 142; + case 0x00c5: return 143; + case 0x00c9: return 144; + case 0x00e6: return 145; + case 0x00c6: return 146; + case 0x00f4: return 147; + case 0x00f6: return 148; + case 0x00f2: return 149; + case 0x00fb: return 150; + case 0x00f9: return 151; + case 0x00ff: return 152; + case 0x00d6: return 153; + case 0x00dc: return 154; + case 0x00a2: return 155; + case 0x00a3: return 156; + case 0x00a5: return 157; + case 0x20a7: return 158; + case 0x0192: return 159; + case 0x00e1: return 160; + case 0x00ed: return 161; + case 0x00f3: return 162; + case 0x00fa: return 163; + case 0x00f1: return 164; + case 0x00d1: return 165; + case 0x00aa: return 166; + case 0x00ba: return 167; + case 0x00bf: return 168; + case 0x2310: return 169; + case 0x00ac: return 170; + case 0x00bd: return 171; + case 0x00bc: return 172; + case 0x00a1: return 173; + case 0x00ab: return 174; + case 0x00bb: return 175; + case 0x2591: return 176; + case 0x2592: return 177; + case 0x2593: return 178; + case 0x2502: return 179; + case 0x2524: return 180; + case 0x2561: return 181; + case 0x2562: return 182; + case 0x2556: return 183; + case 0x2555: return 184; + case 0x2563: return 185; + case 0x2551: return 186; + case 0x2557: return 187; + case 0x255d: return 188; + case 0x255c: return 189; + case 0x255b: return 190; + case 0x2510: return 191; + case 0x2514: return 192; + case 0x2534: return 193; + case 0x252c: return 194; + case 0x251c: return 195; + case 0x2500: return 196; + case 0x253c: return 197; + case 0x255e: return 198; + case 0x255f: return 199; + case 0x255a: return 200; + case 0x2554: return 201; + case 0x2569: return 202; + case 0x2566: return 203; + case 0x2560: return 204; + case 0x2550: return 205; + case 0x256c: return 206; + case 0x2567: return 207; + case 0x2568: return 208; + case 0x2564: return 209; + case 0x2565: return 210; + case 0x2559: return 211; + case 0x2558: return 212; + case 0x2552: return 213; + case 0x2553: return 214; + case 0x256b: return 215; + case 0x256a: return 216; + case 0x2518: return 217; + case 0x250c: return 218; + case 0x2588: return 219; + case 0x2584: return 220; + case 0x258c: return 221; + case 0x2590: return 222; + case 0x2580: return 223; + case 0x03b1: return 224; + case 0x00df: return 225; + case 0x0393: return 226; + case 0x03c0: return 227; + case 0x03a3: return 228; + case 0x03c3: return 229; + case 0x00b5: return 230; + case 0x03c4: return 231; + case 0x03a6: return 232; + case 0x0398: return 233; + case 0x03a9: return 234; + case 0x03b4: return 235; + case 0x221e: return 236; + case 0x03c6: return 237; + case 0x03b5: return 238; + case 0x2229: return 239; + case 0x2261: return 240; + case 0x00b1: return 241; + case 0x2265: return 242; + case 0x2264: return 243; + case 0x2320: return 244; + case 0x2321: return 245; + case 0x00f7: return 246; + case 0x2248: return 247; + case 0x00b0: return 248; + case 0x2219: return 249; + case 0x00b7: return 250; + case 0x221a: return 251; + case 0x207f: return 252; + case 0x00b2: return 253; + case 0x25a0: return 254; + } + + return -1; +} + +static void flanterm_putchar(struct flanterm_context *ctx, UCHAR c) { + if (ctx->discard_next || (c == 0x18 || c == 0x1a)) { + ctx->discard_next = false; + ctx->escape = false; + ctx->control_sequence = false; + ctx->unicode_remaining = 0; + ctx->osc = false; + ctx->osc_escape = false; + ctx->g_select = 0; + return; + } + + if (ctx->unicode_remaining != 0) { + if ((c & 0xc0) != 0x80) { + ctx->unicode_remaining = 0; + goto unicode_error; + } + + ctx->unicode_remaining--; + ctx->code_point |= (UQUAD)(c & 0x3f) << (6 * ctx->unicode_remaining); + if (ctx->unicode_remaining != 0) { + return; + } + + int cc = unicode_to_cp437(ctx->code_point); + + if (cc == -1) { + USIZE replacement_width = (USIZE)mk_wcwidth(ctx->code_point); + if (replacement_width > 0) { + ctx->raw_putchar(ctx, 0xfe); + } + for (USIZE i = 1; i < replacement_width; i++) { + ctx->raw_putchar(ctx, ' '); + } + } else { + ctx->raw_putchar(ctx, cc); + } + return; + } + +unicode_error: + if (c >= 0xc0 && c <= 0xf7) { + if (c >= 0xc0 && c <= 0xdf) { + ctx->unicode_remaining = 1; + ctx->code_point = (UQUAD)(c & 0x1f) << 6; + } else if (c >= 0xe0 && c <= 0xef) { + ctx->unicode_remaining = 2; + ctx->code_point = (UQUAD)(c & 0x0f) << (6 * 2); + } else if (c >= 0xf0 && c <= 0xf7) { + ctx->unicode_remaining = 3; + ctx->code_point = (UQUAD)(c & 0x07) << (6 * 3); + } + return; + } + + if (ctx->escape == true) { + escape_parse(ctx, c); + return; + } + + if (ctx->g_select) { + ctx->g_select--; + switch (c) { + case 'B': + ctx->charsets[ctx->g_select] = CHARSET_DEFAULT; break; + case '0': + ctx->charsets[ctx->g_select] = CHARSET_DEC_SPECIAL; break; + } + ctx->g_select = 0; + return; + } + + USIZE x, y; + ctx->get_cursor_pos(ctx, &x, &y); + + switch (c) { + case 0x00: + case 0x7f: + return; + case 0x1b: + ctx->escape_offset = 0; + ctx->escape = true; + return; + case '\t': + if ((x / ctx->tab_size + 1) >= ctx->cols) { + ctx->set_cursor_pos(ctx, ctx->cols - 1, y); + return; + } + ctx->set_cursor_pos(ctx, (x / ctx->tab_size + 1) * ctx->tab_size, y); + return; + case 0x0b: + case 0x0c: + case '\n': + if (y == ctx->scroll_bottom_margin - 1) { + ctx->scroll(ctx); + ctx->set_cursor_pos(ctx, (ctx->oob_output & FLANTERM_OOB_OUTPUT_ONLCR) ? 0 : x, y); + } else { + ctx->set_cursor_pos(ctx, (ctx->oob_output & FLANTERM_OOB_OUTPUT_ONLCR) ? 0 : x, y + 1); + } + return; + case '\b': + ctx->set_cursor_pos(ctx, x - 1, y); + return; + case '\r': + ctx->set_cursor_pos(ctx, 0, y); + return; + case '\a': + // The bell is handled by the kernel + if (ctx->callback != NULL) { + ctx->callback(ctx, FLANTERM_CB_BELL, 0, 0, 0); + } + return; + case 14: + // Move to G1 set + ctx->current_charset = 1; + return; + case 15: + // Move to G0 set + ctx->current_charset = 0; + return; + } + + if (ctx->insert_mode == true) { + for (USIZE i = ctx->cols - 1; ; i--) { + ctx->move_character(ctx, i + 1, y, i, y); + if (i == x) { + break; + } + } + } + + // Translate character set + switch (ctx->charsets[ctx->current_charset]) { + case CHARSET_DEFAULT: + break; + case CHARSET_DEC_SPECIAL: + if (dec_special_print(ctx, c)) { + return; + } + break; + } + + if (c >= 0x20 && c <= 0x7e) { + ctx->raw_putchar(ctx, c); + } else { + ctx->raw_putchar(ctx, 0xfe); + } +} + +void flanterm_flush(struct flanterm_context *ctx) { + ctx->double_buffer_flush(ctx); +} + +void flanterm_full_refresh(struct flanterm_context *ctx) { + ctx->full_refresh(ctx); +} + +void flanterm_deinit(struct flanterm_context *ctx, void (*_free)(void *, USIZE)) { + ctx->deinit(ctx, _free); +} + +void flanterm_get_dimensions(struct flanterm_context *ctx, USIZE *cols, USIZE *rows) { + *cols = ctx->cols; + *rows = ctx->rows; +} + +void flanterm_set_autoflush(struct flanterm_context *ctx, bool state) { + ctx->autoflush = state; +} + +void flanterm_set_callback(struct flanterm_context *ctx, void (*callback)(struct flanterm_context *, UQUAD, UQUAD, UQUAD, UQUAD)) { + ctx->callback = callback; +} + +UQUAD flanterm_get_oob_output(struct flanterm_context *ctx) { + return ctx->oob_output; +} + +void flanterm_set_oob_output(struct flanterm_context *ctx, UQUAD oob_output) { + ctx->oob_output = oob_output; +} diff --git a/paw/stos/xt/flanterm/src/flanterm.h b/paw/stos/xt/flanterm/src/flanterm.h new file mode 100644 index 0000000..6e149d2 --- /dev/null +++ b/paw/stos/xt/flanterm/src/flanterm.h @@ -0,0 +1,88 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/* Copyright (C) 2022-2026 Mintsuki and contributors. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef FLANTERM_H +#define FLANTERM_H 1 + +#include + +#ifndef _HAVE_bool +#define _HAVE_bool 1 +typedef _Bool bool; + +#define true 1 +#define false 0 +#endif /* !_HAVE_bool */ + +#ifdef __cplusplus +extern "C" { +#endif + +#define FLANTERM_CB_DEC 10 +#define FLANTERM_CB_BELL 20 +#define FLANTERM_CB_PRIVATE_ID 30 +#define FLANTERM_CB_STATUS_REPORT 40 +#define FLANTERM_CB_POS_REPORT 50 +#define FLANTERM_CB_KBD_LEDS 60 +#define FLANTERM_CB_MODE 70 +#define FLANTERM_CB_LINUX 80 + +#define FLANTERM_OOB_OUTPUT_OCRNL (1 << 0) +#define FLANTERM_OOB_OUTPUT_OFDEL (1 << 1) +#define FLANTERM_OOB_OUTPUT_OFILL (1 << 2) +#define FLANTERM_OOB_OUTPUT_OLCUC (1 << 3) +#define FLANTERM_OOB_OUTPUT_ONLCR (1 << 4) +#define FLANTERM_OOB_OUTPUT_ONLRET (1 << 5) +#define FLANTERM_OOB_OUTPUT_ONOCR (1 << 6) +#define FLANTERM_OOB_OUTPUT_OPOST (1 << 7) + +#ifdef FLANTERM_IN_FLANTERM + +#include "flanterm_private.h" + +#else + +struct flanterm_context; + +#endif + +void flanterm_write(struct flanterm_context *ctx, const char *buf, USIZE count); +void flanterm_flush(struct flanterm_context *ctx); +void flanterm_full_refresh(struct flanterm_context *ctx); +void flanterm_deinit(struct flanterm_context *ctx, void (*_free)(void *ptr, USIZE size)); + +void flanterm_get_dimensions(struct flanterm_context *ctx, USIZE *cols, USIZE *rows); +void flanterm_set_autoflush(struct flanterm_context *ctx, bool state); +void flanterm_set_callback(struct flanterm_context *ctx, void (*callback)(struct flanterm_context *, UQUAD, UQUAD, UQUAD, UQUAD)); +UQUAD flanterm_get_oob_output(struct flanterm_context *ctx); +void flanterm_set_oob_output(struct flanterm_context *ctx, UQUAD oob_output); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/paw/stos/xt/flanterm/src/flanterm_backends/fb.c b/paw/stos/xt/flanterm/src/flanterm_backends/fb.c new file mode 100644 index 0000000..efe0857 --- /dev/null +++ b/paw/stos/xt/flanterm/src/flanterm_backends/fb.c @@ -0,0 +1,1409 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/* Copyright (C) 2022-2026 Mintsuki and contributors. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifdef __cplusplus +#error "Please do not compile Flanterm as C++ code! Flanterm should be compiled as C99 or newer." +#endif + +#ifndef __STDC_VERSION__ +#error "Flanterm must be compiled as C99 or newer." +#endif + +#if defined(_MSC_VER) +#elif defined(__GNUC__) || defined(__clang__) +#else +#endif + +#include + +#ifndef FLANTERM_IN_FLANTERM +#define FLANTERM_IN_FLANTERM +#endif + +#include "../flanterm.h" +#include "fb.h" + +void *RtlMemSet(void *, int, USIZE); +void *RtlMemCpy(void *, const void *, USIZE); + +#ifndef FLANTERM_FB_DISABLE_BUMP_ALLOC + +#ifndef FLANTERM_FB_BUMP_ALLOC_POOL_SIZE +#define FLANTERM_FB_BUMP_ALLOC_POOL_SIZE 873000 + +#define FLANTERM_FB_WIDTH_LIMIT 1920 +#define FLANTERM_FB_HEIGHT_LIMIT 1200 +#endif + +static UCHAR bump_alloc_pool[FLANTERM_FB_BUMP_ALLOC_POOL_SIZE]; +static USIZE bump_alloc_ptr = 0; + +static void *bump_alloc(USIZE s) { + static bool base_offset_added = false; + if (!base_offset_added) { + if ((UPTR)bump_alloc_pool & 0xf) { + bump_alloc_ptr += 0x10 - ((UPTR)bump_alloc_pool & 0xf); + } + base_offset_added = true; + } + + if ((s & 0xf) != 0) { + s += 0x10; + s &= ~(USIZE)0xf; + } + + USIZE next_ptr = bump_alloc_ptr + s; + if (next_ptr > FLANTERM_FB_BUMP_ALLOC_POOL_SIZE) { + return NULL; + } + void *ret = &bump_alloc_pool[bump_alloc_ptr]; + bump_alloc_ptr = next_ptr; + return ret; +} + +static bool bump_allocated_instance = false; + +#endif + +// Builtin font originally taken from: +// https://github.com/viler-int10h/vga-text-mode-fonts/raw/master/FONTS/PC-OTHER/TOSH-SAT.F16 +static const UCHAR builtin_font[] = { + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x3c, 0x42, 0x81, 0x81, 0xa5, 0xa5, 0x81, + 0x81, 0xa5, 0x99, 0x81, 0x42, 0x3c, 0x00, 0x00, 0x00, 0x3c, 0x7e, 0xff, + 0xff, 0xdb, 0xdb, 0xff, 0xff, 0xdb, 0xe7, 0xff, 0x7e, 0x3c, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x6c, 0xfe, 0xfe, 0xfe, 0x7c, 0x7c, 0x38, 0x38, 0x10, + 0x10, 0x00, 0x00, 0x00, 0x00, 0x10, 0x10, 0x38, 0x38, 0x7c, 0x7c, 0xfe, + 0x7c, 0x7c, 0x38, 0x38, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x18, + 0x3c, 0x3c, 0xdb, 0xff, 0xff, 0xdb, 0x18, 0x18, 0x3c, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x18, 0x3c, 0x7e, 0xff, 0xff, 0xff, 0x66, 0x18, 0x18, + 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x78, + 0x78, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, + 0xff, 0xff, 0xe7, 0xc3, 0xc3, 0xe7, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x78, 0xcc, 0x84, 0x84, 0xcc, 0x78, 0x00, + 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xc3, 0x99, 0xbd, + 0xbd, 0x99, 0xc3, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x1e, + 0x0e, 0x1e, 0x32, 0x78, 0xcc, 0xcc, 0xcc, 0x78, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x78, 0xcc, 0xcc, 0xcc, 0x78, 0x30, 0xfc, 0x30, 0x30, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x10, 0x18, 0x1c, 0x1e, 0x16, 0x12, + 0x10, 0x10, 0x70, 0xf0, 0xe0, 0x00, 0x00, 0x00, 0x00, 0x30, 0x38, 0x2c, + 0x26, 0x32, 0x3a, 0x2e, 0x26, 0x22, 0x62, 0xe2, 0xc6, 0x0e, 0x0c, 0x00, + 0x00, 0x00, 0x00, 0x18, 0x18, 0xdb, 0x3c, 0xe7, 0x3c, 0xdb, 0x18, 0x18, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xc0, 0xe0, 0xf8, 0xfe, + 0xf8, 0xe0, 0xc0, 0x80, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, + 0x06, 0x0e, 0x3e, 0xfe, 0x3e, 0x0e, 0x06, 0x02, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x30, 0x78, 0xfc, 0x30, 0x30, 0x30, 0x30, 0x30, 0xfc, 0x78, + 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, + 0xcc, 0xcc, 0x00, 0xcc, 0xcc, 0x00, 0x00, 0x00, 0x00, 0x00, 0x7f, 0xdb, + 0xdb, 0xdb, 0xdb, 0x7b, 0x1b, 0x1b, 0x1b, 0x1b, 0x1b, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x7c, 0xc6, 0x60, 0x38, 0x6c, 0xc6, 0xc6, 0x6c, 0x38, 0x0c, + 0xc6, 0x7c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0xfe, 0xfe, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x78, + 0xfc, 0x30, 0x30, 0x30, 0x30, 0x30, 0xfc, 0x78, 0x30, 0xfc, 0x00, 0x00, + 0x00, 0x00, 0x30, 0x78, 0xfc, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, + 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x30, 0x30, 0x30, 0x30, + 0x30, 0x30, 0xfc, 0x78, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x18, 0x0c, 0xfe, 0xfe, 0x0c, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x60, 0xfe, 0xfe, 0x60, 0x30, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0, + 0xc0, 0xc0, 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x24, 0x66, 0xff, 0xff, 0x66, 0x24, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x10, 0x10, 0x38, 0x38, 0x7c, 0x7c, 0xfe, 0xfe, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfe, 0xfe, 0x7c, 0x7c, + 0x38, 0x38, 0x10, 0x10, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x30, 0x78, 0x78, 0x78, 0x78, 0x30, 0x30, 0x30, 0x00, 0x30, + 0x30, 0x00, 0x00, 0x00, 0x00, 0x00, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x6c, 0x6c, + 0x6c, 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0x00, 0x00, 0x78, 0xcc, 0xcc, + 0xcc, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x30, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x0c, 0x0c, + 0x0c, 0x0c, 0x0c, 0x0c, 0x0c, 0xcc, 0x6c, 0x3c, 0x1c, 0x0c, 0x00, 0x00, + 0x00, 0xd8, 0xec, 0xcc, 0xcc, 0xcc, 0xcc, 0xcc, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x38, 0x6c, 0x0c, 0x18, 0x30, 0x60, 0x7c, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x78, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, + 0x00, 0x00, 0x00, 0x00 +}; + +static ALWAYS_INLINE ULONG convert_colour(struct flanterm_context *_ctx, ULONG colour) { + struct flanterm_fb_context *ctx = (void *)_ctx; + ULONG r = (colour >> 16) & 0xff; + ULONG g = (colour >> 8) & 0xff; + ULONG b = colour & 0xff; + return (r << ctx->red_mask_shift) | (g << ctx->green_mask_shift) | (b << ctx->blue_mask_shift); +} + +static void flanterm_fb_save_state(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + ctx->saved_state_text_fg = ctx->text_fg; + ctx->saved_state_text_bg = ctx->text_bg; + ctx->saved_state_cursor_x = ctx->cursor_x; + ctx->saved_state_cursor_y = ctx->cursor_y; +} + +static void flanterm_fb_restore_state(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + ctx->text_fg = ctx->saved_state_text_fg; + ctx->text_bg = ctx->saved_state_text_bg; + ctx->cursor_x = ctx->saved_state_cursor_x; + ctx->cursor_y = ctx->saved_state_cursor_y; +} + +static void flanterm_fb_swap_palette(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + ULONG tmp = ctx->text_bg; + ctx->text_bg = ctx->text_fg; + ctx->text_fg = tmp; +} + +static void plot_char_scaled_canvas(struct flanterm_context *_ctx, struct flanterm_fb_char *c, USIZE x, USIZE y) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (x >= _ctx->cols || y >= _ctx->rows) { + return; + } + + x = ctx->offset_x + x * ctx->glyph_width; + y = ctx->offset_y + y * ctx->glyph_height; + + bool *glyph = &ctx->font_bool[c->c * ctx->font_height * ctx->font_width]; + + volatile ULONG *dest; + int outer_stride, inner_stride; + + switch (ctx->rotation) { + default: + case FLANTERM_FB_ROTATE_0: + dest = ctx->framebuffer + x + y * (ctx->pitch / 4); + outer_stride = ctx->pitch / 4; + inner_stride = 1; + break; + case FLANTERM_FB_ROTATE_90: + dest = ctx->framebuffer + (ctx->height - 1 - y) + x * (ctx->pitch / 4); + outer_stride = -1; + inner_stride = ctx->pitch / 4; + break; + case FLANTERM_FB_ROTATE_180: + dest = ctx->framebuffer + (ctx->width - 1 - x) + (ctx->height - 1 - y) * (ctx->pitch / 4); + outer_stride = -(ctx->pitch / 4); + inner_stride = -1; + break; + case FLANTERM_FB_ROTATE_270: + dest = ctx->framebuffer + y + (ctx->width - 1 - x) * (ctx->pitch / 4); + outer_stride = 1; + inner_stride = -(ctx->pitch / 4); + break; + } + + // naming: fx,fy for font coordinates, gx,gy for glyph coordinates + for (USIZE gy = 0; gy < ctx->glyph_height; gy++) { + UCHAR fy = gy / ctx->font_scale_y; + volatile ULONG *fb_line = dest; + ULONG *canvas_line = ctx->canvas + x + (y + gy) * ctx->width; + bool *glyph_pointer = glyph + (fy * ctx->font_width); + for (USIZE fx = 0; fx < ctx->font_width; fx++) { + for (USIZE i = 0; i < ctx->font_scale_x; i++) { + USIZE gx = ctx->font_scale_x * fx + i; + ULONG bg = c->bg == 0xffffffff ? canvas_line[gx] : c->bg; + ULONG fg = c->fg == 0xffffffff ? canvas_line[gx] : c->fg; + *fb_line = *glyph_pointer ? fg : bg; + fb_line += inner_stride; + } + glyph_pointer++; + } + dest += outer_stride; + } +} + +static void plot_char_scaled_uncanvas(struct flanterm_context *_ctx, struct flanterm_fb_char *c, USIZE x, USIZE y) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (x >= _ctx->cols || y >= _ctx->rows) { + return; + } + + ULONG default_bg = ctx->default_bg; + + ULONG bg = c->bg == 0xffffffff ? default_bg : c->bg; + ULONG fg = c->fg == 0xffffffff ? default_bg : c->fg; + + x = ctx->offset_x + x * ctx->glyph_width; + y = ctx->offset_y + y * ctx->glyph_height; + + bool *glyph = &ctx->font_bool[c->c * ctx->font_height * ctx->font_width]; + + volatile ULONG *dest; + int outer_stride, inner_stride; + + switch (ctx->rotation) { + default: + case FLANTERM_FB_ROTATE_0: + dest = ctx->framebuffer + x + y * (ctx->pitch / 4); + outer_stride = ctx->pitch / 4; + inner_stride = 1; + break; + case FLANTERM_FB_ROTATE_90: + dest = ctx->framebuffer + (ctx->height - 1 - y) + x * (ctx->pitch / 4); + outer_stride = -1; + inner_stride = ctx->pitch / 4; + break; + case FLANTERM_FB_ROTATE_180: + dest = ctx->framebuffer + (ctx->width - 1 - x) + (ctx->height - 1 - y) * (ctx->pitch / 4); + outer_stride = -(ctx->pitch / 4); + inner_stride = -1; + break; + case FLANTERM_FB_ROTATE_270: + dest = ctx->framebuffer + y + (ctx->width - 1 - x) * (ctx->pitch / 4); + outer_stride = 1; + inner_stride = -(ctx->pitch / 4); + break; + } + + // naming: fx,fy for font coordinates, gx,gy for glyph coordinates + for (USIZE gy = 0; gy < ctx->glyph_height; gy++) { + UCHAR fy = gy / ctx->font_scale_y; + volatile ULONG *fb_line = dest; + bool *glyph_pointer = glyph + (fy * ctx->font_width); + for (USIZE fx = 0; fx < ctx->font_width; fx++) { + for (USIZE i = 0; i < ctx->font_scale_x; i++) { + *fb_line = *glyph_pointer ? fg : bg; + fb_line += inner_stride; + } + glyph_pointer++; + } + dest += outer_stride; + } +} + +static void plot_char_unscaled_canvas(struct flanterm_context *_ctx, struct flanterm_fb_char *c, USIZE x, USIZE y) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (x >= _ctx->cols || y >= _ctx->rows) { + return; + } + + x = ctx->offset_x + x * ctx->glyph_width; + y = ctx->offset_y + y * ctx->glyph_height; + + bool *glyph = &ctx->font_bool[c->c * ctx->font_height * ctx->font_width]; + + volatile ULONG *dest; + int outer_stride, inner_stride; + + switch (ctx->rotation) { + default: + case FLANTERM_FB_ROTATE_0: + dest = ctx->framebuffer + x + y * (ctx->pitch / 4); + outer_stride = ctx->pitch / 4; + inner_stride = 1; + break; + case FLANTERM_FB_ROTATE_90: + dest = ctx->framebuffer + (ctx->height - 1 - y) + x * (ctx->pitch / 4); + outer_stride = -1; + inner_stride = ctx->pitch / 4; + break; + case FLANTERM_FB_ROTATE_180: + dest = ctx->framebuffer + (ctx->width - 1 - x) + (ctx->height - 1 - y) * (ctx->pitch / 4); + outer_stride = -(ctx->pitch / 4); + inner_stride = -1; + break; + case FLANTERM_FB_ROTATE_270: + dest = ctx->framebuffer + y + (ctx->width - 1 - x) * (ctx->pitch / 4); + outer_stride = 1; + inner_stride = -(ctx->pitch / 4); + break; + } + + // naming: fx,fy for font coordinates, gx,gy for glyph coordinates + for (USIZE gy = 0; gy < ctx->glyph_height; gy++) { + volatile ULONG *fb_line = dest; + ULONG *canvas_line = ctx->canvas + x + (y + gy) * ctx->width; + bool *glyph_pointer = glyph + (gy * ctx->font_width); + for (USIZE fx = 0; fx < ctx->font_width; fx++) { + ULONG bg = c->bg == 0xffffffff ? canvas_line[fx] : c->bg; + ULONG fg = c->fg == 0xffffffff ? canvas_line[fx] : c->fg; + *fb_line = *(glyph_pointer++) ? fg : bg; + fb_line += inner_stride; + } + dest += outer_stride; + } +} + +static void plot_char_unscaled_uncanvas(struct flanterm_context *_ctx, struct flanterm_fb_char *c, USIZE x, USIZE y) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (x >= _ctx->cols || y >= _ctx->rows) { + return; + } + + ULONG default_bg = ctx->default_bg; + + ULONG bg = c->bg == 0xffffffff ? default_bg : c->bg; + ULONG fg = c->fg == 0xffffffff ? default_bg : c->fg; + + x = ctx->offset_x + x * ctx->glyph_width; + y = ctx->offset_y + y * ctx->glyph_height; + + bool *glyph = &ctx->font_bool[c->c * ctx->font_height * ctx->font_width]; + + volatile ULONG *dest; + int outer_stride, inner_stride; + + switch (ctx->rotation) { + default: + case FLANTERM_FB_ROTATE_0: + dest = ctx->framebuffer + x + y * (ctx->pitch / 4); + outer_stride = ctx->pitch / 4; + inner_stride = 1; + break; + case FLANTERM_FB_ROTATE_90: + dest = ctx->framebuffer + (ctx->height - 1 - y) + x * (ctx->pitch / 4); + outer_stride = -1; + inner_stride = ctx->pitch / 4; + break; + case FLANTERM_FB_ROTATE_180: + dest = ctx->framebuffer + (ctx->width - 1 - x) + (ctx->height - 1 - y) * (ctx->pitch / 4); + outer_stride = -(ctx->pitch / 4); + inner_stride = -1; + break; + case FLANTERM_FB_ROTATE_270: + dest = ctx->framebuffer + y + (ctx->width - 1 - x) * (ctx->pitch / 4); + outer_stride = 1; + inner_stride = -(ctx->pitch / 4); + break; + } + + // naming: fx,fy for font coordinates, gx,gy for glyph coordinates + for (USIZE gy = 0; gy < ctx->glyph_height; gy++) { + volatile ULONG *fb_line = dest; + bool *glyph_pointer = glyph + (gy * ctx->font_width); + for (USIZE fx = 0; fx < ctx->font_width; fx++) { + *fb_line = *(glyph_pointer++) ? fg : bg; + fb_line += inner_stride; + } + dest += outer_stride; + } +} + +static inline bool compare_char(struct flanterm_fb_char *a, struct flanterm_fb_char *b) { + return !(a->c != b->c || a->bg != b->bg || a->fg != b->fg); +} + +static void push_to_queue(struct flanterm_context *_ctx, struct flanterm_fb_char *c, USIZE x, USIZE y) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (x >= _ctx->cols || y >= _ctx->rows) { + return; + } + + USIZE i = y * _ctx->cols + x; + + struct flanterm_fb_queue_item *q = ctx->map[i]; + + if (q == NULL) { + if (compare_char(&ctx->grid[i], c)) { + return; + } + q = &ctx->queue[ctx->queue_i++]; + q->x = x; + q->y = y; + ctx->map[i] = q; + } + + q->c = *c; +} + +static void flanterm_fb_revscroll(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + for (USIZE i = (_ctx->scroll_bottom_margin - 1) * _ctx->cols - 1; + i >= _ctx->scroll_top_margin * _ctx->cols; i--) { + if (i == (USIZE)-1) { + break; + } + struct flanterm_fb_char *c; + struct flanterm_fb_queue_item *q = ctx->map[i]; + if (q != NULL) { + c = &q->c; + } else { + c = &ctx->grid[i]; + } + push_to_queue(_ctx, c, (i + _ctx->cols) % _ctx->cols, (i + _ctx->cols) / _ctx->cols); + } + + // Clear the first line of the screen. + struct flanterm_fb_char empty; + empty.c = ' '; + empty.fg = ctx->text_fg; + empty.bg = ctx->text_bg; + for (USIZE i = 0; i < _ctx->cols; i++) { + push_to_queue(_ctx, &empty, i, _ctx->scroll_top_margin); + } +} + +static void flanterm_fb_scroll(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + for (USIZE i = (_ctx->scroll_top_margin + 1) * _ctx->cols; + i < _ctx->scroll_bottom_margin * _ctx->cols; i++) { + struct flanterm_fb_char *c; + struct flanterm_fb_queue_item *q = ctx->map[i]; + if (q != NULL) { + c = &q->c; + } else { + c = &ctx->grid[i]; + } + push_to_queue(_ctx, c, (i - _ctx->cols) % _ctx->cols, (i - _ctx->cols) / _ctx->cols); + } + + // Clear the last line of the screen. + struct flanterm_fb_char empty; + empty.c = ' '; + empty.fg = ctx->text_fg; + empty.bg = ctx->text_bg; + for (USIZE i = 0; i < _ctx->cols; i++) { + push_to_queue(_ctx, &empty, i, _ctx->scroll_bottom_margin - 1); + } +} + +static void flanterm_fb_clear(struct flanterm_context *_ctx, bool move) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + struct flanterm_fb_char empty; + empty.c = ' '; + empty.fg = ctx->text_fg; + empty.bg = ctx->text_bg; + for (USIZE i = 0; i < _ctx->rows * _ctx->cols; i++) { + push_to_queue(_ctx, &empty, i % _ctx->cols, i / _ctx->cols); + } + + if (move) { + ctx->cursor_x = 0; + ctx->cursor_y = 0; + } +} + +static void flanterm_fb_set_cursor_pos(struct flanterm_context *_ctx, USIZE x, USIZE y) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (x >= _ctx->cols) { + if ((int)x < 0) { + x = 0; + } else { + x = _ctx->cols - 1; + } + } + if (y >= _ctx->rows) { + if ((int)y < 0) { + y = 0; + } else { + y = _ctx->rows - 1; + } + } + ctx->cursor_x = x; + ctx->cursor_y = y; +} + +static void flanterm_fb_get_cursor_pos(struct flanterm_context *_ctx, USIZE *x, USIZE *y) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + *x = ctx->cursor_x >= _ctx->cols ? _ctx->cols - 1 : ctx->cursor_x; + *y = ctx->cursor_y >= _ctx->rows ? _ctx->rows - 1 : ctx->cursor_y; +} + +static void flanterm_fb_move_character(struct flanterm_context *_ctx, USIZE new_x, USIZE new_y, USIZE old_x, USIZE old_y) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (old_x >= _ctx->cols || old_y >= _ctx->rows + || new_x >= _ctx->cols || new_y >= _ctx->rows) { + return; + } + + USIZE i = old_x + old_y * _ctx->cols; + + struct flanterm_fb_char *c; + struct flanterm_fb_queue_item *q = ctx->map[i]; + if (q != NULL) { + c = &q->c; + } else { + c = &ctx->grid[i]; + } + + push_to_queue(_ctx, c, new_x, new_y); +} + +static void flanterm_fb_set_text_fg(struct flanterm_context *_ctx, USIZE fg) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ctx->text_fg = ctx->ansi_colours[fg]; +} + +static void flanterm_fb_set_text_bg(struct flanterm_context *_ctx, USIZE bg) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ctx->text_bg = ctx->ansi_colours[bg]; +} + +static void flanterm_fb_set_text_fg_bright(struct flanterm_context *_ctx, USIZE fg) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ctx->text_fg = ctx->ansi_bright_colours[fg]; +} + +static void flanterm_fb_set_text_bg_bright(struct flanterm_context *_ctx, USIZE bg) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ctx->text_bg = ctx->ansi_bright_colours[bg]; +} + +static void flanterm_fb_set_text_fg_rgb(struct flanterm_context *_ctx, ULONG fg) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ctx->text_fg = convert_colour(_ctx, fg); +} + +static void flanterm_fb_set_text_bg_rgb(struct flanterm_context *_ctx, ULONG bg) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ctx->text_bg = convert_colour(_ctx, bg); +} + +static void flanterm_fb_set_text_fg_default(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ctx->text_fg = ctx->default_fg; +} + +static void flanterm_fb_set_text_bg_default(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ctx->text_bg = 0xffffffff; +} + +static void flanterm_fb_set_text_fg_default_bright(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ctx->text_fg = ctx->default_fg_bright; +} + +static void flanterm_fb_set_text_bg_default_bright(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ctx->text_bg = ctx->default_bg_bright; +} + +static void draw_cursor(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (ctx->cursor_x >= _ctx->cols || ctx->cursor_y >= _ctx->rows) { + return; + } + + USIZE i = ctx->cursor_x + ctx->cursor_y * _ctx->cols; + + struct flanterm_fb_char c; + struct flanterm_fb_queue_item *q = ctx->map[i]; + if (q != NULL) { + c = q->c; + } else { + c = ctx->grid[i]; + } + ULONG tmp = c.fg; + c.fg = c.bg; + c.bg = tmp; + ctx->plot_char(_ctx, &c, ctx->cursor_x, ctx->cursor_y); + if (q != NULL) { + ctx->grid[i] = q->c; + ctx->map[i] = NULL; + } +} + +static void flanterm_fb_double_buffer_flush(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (_ctx->cursor_enabled) { + draw_cursor(_ctx); + } + + for (USIZE i = 0; i < ctx->queue_i; i++) { + struct flanterm_fb_queue_item *q = &ctx->queue[i]; + USIZE offset = q->y * _ctx->cols + q->x; + if (ctx->map[offset] == NULL) { + continue; + } + ctx->plot_char(_ctx, &q->c, q->x, q->y); + ctx->grid[offset] = q->c; + ctx->map[offset] = NULL; + } + + if ((ctx->old_cursor_x != ctx->cursor_x || ctx->old_cursor_y != ctx->cursor_y) || _ctx->cursor_enabled == false) { + if (ctx->old_cursor_x < _ctx->cols && ctx->old_cursor_y < _ctx->rows) { + ctx->plot_char(_ctx, &ctx->grid[ctx->old_cursor_x + ctx->old_cursor_y * _ctx->cols], ctx->old_cursor_x, ctx->old_cursor_y); + } + } + + ctx->old_cursor_x = ctx->cursor_x; + ctx->old_cursor_y = ctx->cursor_y; + + ctx->queue_i = 0; + + if (ctx->flush_callback) { + ctx->flush_callback(ctx->framebuffer, ctx->pitch * ctx->height); + } +} + +static void flanterm_fb_raw_putchar(struct flanterm_context *_ctx, UCHAR c) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (ctx->cursor_x >= _ctx->cols && (ctx->cursor_y < _ctx->scroll_bottom_margin - 1 || _ctx->scroll_enabled)) { + ctx->cursor_x = 0; + ctx->cursor_y++; + if (ctx->cursor_y == _ctx->scroll_bottom_margin) { + ctx->cursor_y--; + flanterm_fb_scroll(_ctx); + } + if (ctx->cursor_y >= _ctx->cols) { + ctx->cursor_y = _ctx->cols - 1; + } + } + + struct flanterm_fb_char ch; + ch.c = c; + ch.fg = ctx->text_fg; + ch.bg = ctx->text_bg; + push_to_queue(_ctx, &ch, ctx->cursor_x++, ctx->cursor_y); +} + +static void flanterm_fb_full_refresh(struct flanterm_context *_ctx) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + ULONG default_bg = ctx->default_bg; + + for (USIZE y = 0; y < ctx->height; y++) { + for (USIZE x = 0; x < ctx->width; x++) { + USIZE px, py; + switch (ctx->rotation) { + default: + case FLANTERM_FB_ROTATE_0: + px = x; py = y; + break; + case FLANTERM_FB_ROTATE_90: + px = ctx->height - 1 - y; py = x; + break; + case FLANTERM_FB_ROTATE_180: + px = ctx->width - 1 - x; py = ctx->height - 1 - y; + break; + case FLANTERM_FB_ROTATE_270: + px = y; py = ctx->width - 1 - x; + break; + } + + if (ctx->canvas != NULL) { + ctx->framebuffer[py * (ctx->pitch / sizeof(ULONG)) + px] = ctx->canvas[y * ctx->width + x]; + } else { + ctx->framebuffer[py * (ctx->pitch / sizeof(ULONG)) + px] = default_bg; + } + } + } + + for (USIZE i = 0; i < (USIZE)_ctx->rows * _ctx->cols; i++) { + USIZE x = i % _ctx->cols; + USIZE y = i / _ctx->cols; + + ctx->plot_char(_ctx, &ctx->grid[i], x, y); + } + + if (_ctx->cursor_enabled) { + draw_cursor(_ctx); + } + + if (ctx->flush_callback) { + ctx->flush_callback(ctx->framebuffer, ctx->pitch * ctx->height); + } +} + +static void flanterm_fb_deinit(struct flanterm_context *_ctx, void (*_free)(void *, USIZE)) { + struct flanterm_fb_context *ctx = (void *)_ctx; + + if (_free == NULL) { +#ifndef FLANTERM_FB_DISABLE_BUMP_ALLOC + if (bump_allocated_instance == true) { + bump_alloc_ptr = 0; + bump_allocated_instance = false; + } +#endif + return; + } + + _free(ctx->font_bits, ctx->font_bits_size); + _free(ctx->font_bool, ctx->font_bool_size); + _free(ctx->grid, ctx->grid_size); + _free(ctx->queue, ctx->queue_size); + _free(ctx->map, ctx->map_size); + + if (ctx->canvas != NULL) { + _free(ctx->canvas, ctx->canvas_size); + } + + _free(ctx, sizeof(struct flanterm_fb_context)); +} + +struct flanterm_context *flanterm_fb_init( + void *(*_malloc)(USIZE), + void (*_free)(void *, USIZE), + ULONG *framebuffer, USIZE width, USIZE height, USIZE pitch, + UCHAR red_mask_size, UCHAR red_mask_shift, + UCHAR green_mask_size, UCHAR green_mask_shift, + UCHAR blue_mask_size, UCHAR blue_mask_shift, + ULONG *canvas, + ULONG *ansi_colours, ULONG *ansi_bright_colours, + ULONG *default_bg, ULONG *default_fg, + ULONG *default_bg_bright, ULONG *default_fg_bright, + void *font, USIZE font_width, USIZE font_height, USIZE font_spacing, + USIZE font_scale_x, USIZE font_scale_y, + USIZE margin, + int rotation +) { + if (rotation == FLANTERM_FB_ROTATE_90 || rotation == FLANTERM_FB_ROTATE_270) { + USIZE tmp = width; + width = height; + height = tmp; + } + + if (font_scale_x == 0 || font_scale_y == 0) { + font_scale_x = 1; + font_scale_y = 1; + if (width >= (1920 + 1920 / 3) && height >= (1080 + 1080 / 3)) { + font_scale_x = 2; + font_scale_y = 2; + } + if (width >= (3840 + 3840 / 3) && height >= (2160 + 2160 / 3)) { + font_scale_x = 4; + font_scale_y = 4; + } + } + + if (red_mask_size < 8 || red_mask_size != green_mask_size || red_mask_size != blue_mask_size) { + return NULL; + } + + if (_malloc == NULL) { +#ifndef FLANTERM_FB_DISABLE_BUMP_ALLOC + if (bump_allocated_instance == true) { + return NULL; + } + _malloc = bump_alloc; + // Limit terminal size if needed + if (width > FLANTERM_FB_WIDTH_LIMIT || height > FLANTERM_FB_HEIGHT_LIMIT) { + USIZE width_limit = width > FLANTERM_FB_WIDTH_LIMIT ? FLANTERM_FB_WIDTH_LIMIT : width; + USIZE height_limit = height > FLANTERM_FB_HEIGHT_LIMIT ? FLANTERM_FB_HEIGHT_LIMIT : height; + + framebuffer = (ULONG *)((UPTR)framebuffer + ((((height / 2) - (height_limit / 2)) * pitch) + (((width / 2) - (width_limit / 2)) * 4))); + + width = width_limit; + height = height_limit; + } + + // Force disable canvas + canvas = NULL; +#else + return NULL; +#endif + } + + struct flanterm_fb_context *ctx = NULL; + ctx = _malloc(sizeof(struct flanterm_fb_context)); + if (ctx == NULL) { + goto fail; + } + + struct flanterm_context *_ctx = (void *)ctx; + RtlMemSet(ctx, 0, sizeof(struct flanterm_fb_context)); + + ctx->red_mask_size = red_mask_size; + ctx->red_mask_shift = red_mask_shift + (red_mask_size - 8); + ctx->green_mask_size = green_mask_size; + ctx->green_mask_shift = green_mask_shift + (green_mask_size - 8); + ctx->blue_mask_size = blue_mask_size; + ctx->blue_mask_shift = blue_mask_shift + (blue_mask_size - 8); + + if (ansi_colours != NULL) { + for (USIZE i = 0; i < 8; i++) { + ctx->ansi_colours[i] = convert_colour(_ctx, ansi_colours[i]); + } + } else { + ctx->ansi_colours[0] = convert_colour(_ctx, 0x00000000); // black + ctx->ansi_colours[1] = convert_colour(_ctx, 0x00aa0000); // red + ctx->ansi_colours[2] = convert_colour(_ctx, 0x0000aa00); // green + ctx->ansi_colours[3] = convert_colour(_ctx, 0x00aa5500); // brown + ctx->ansi_colours[4] = convert_colour(_ctx, 0x000000aa); // blue + ctx->ansi_colours[5] = convert_colour(_ctx, 0x00aa00aa); // magenta + ctx->ansi_colours[6] = convert_colour(_ctx, 0x0000aaaa); // cyan + ctx->ansi_colours[7] = convert_colour(_ctx, 0x00aaaaaa); // grey + } + + if (ansi_bright_colours != NULL) { + for (USIZE i = 0; i < 8; i++) { + ctx->ansi_bright_colours[i] = convert_colour(_ctx, ansi_bright_colours[i]); + } + } else { + ctx->ansi_bright_colours[0] = convert_colour(_ctx, 0x00555555); // black + ctx->ansi_bright_colours[1] = convert_colour(_ctx, 0x00ff5555); // red + ctx->ansi_bright_colours[2] = convert_colour(_ctx, 0x0055ff55); // green + ctx->ansi_bright_colours[3] = convert_colour(_ctx, 0x00ffff55); // brown + ctx->ansi_bright_colours[4] = convert_colour(_ctx, 0x005555ff); // blue + ctx->ansi_bright_colours[5] = convert_colour(_ctx, 0x00ff55ff); // magenta + ctx->ansi_bright_colours[6] = convert_colour(_ctx, 0x0055ffff); // cyan + ctx->ansi_bright_colours[7] = convert_colour(_ctx, 0x00ffffff); // grey + } + + if (default_bg != NULL) { + ctx->default_bg = convert_colour(_ctx, *default_bg); + } else { + ctx->default_bg = 0x00000000; // background (black) + } + + if (default_fg != NULL) { + ctx->default_fg = convert_colour(_ctx, *default_fg); + } else { + ctx->default_fg = convert_colour(_ctx, 0x00aaaaaa); // foreground (grey) + } + + if (default_bg_bright != NULL) { + ctx->default_bg_bright = convert_colour(_ctx, *default_bg_bright); + } else { + ctx->default_bg_bright = convert_colour(_ctx, 0x00555555); // background (black) + } + + if (default_fg_bright != NULL) { + ctx->default_fg_bright = convert_colour(_ctx, *default_fg_bright); + } else { + ctx->default_fg_bright = convert_colour(_ctx, 0x00ffffff); // foreground (grey) + } + + ctx->text_fg = ctx->default_fg; + ctx->text_bg = 0xffffffff; + + ctx->rotation = rotation; + + ctx->framebuffer = (void *)framebuffer; + ctx->width = width; + ctx->height = height; + ctx->pitch = pitch; + +#define FONT_BYTES ((font_width * font_height * FLANTERM_FB_FONT_GLYPHS) / 8) + + if (font != NULL) { + ctx->font_width = font_width; + ctx->font_height = font_height; + ctx->font_bits_size = FONT_BYTES; + ctx->font_bits = _malloc(ctx->font_bits_size); + if (ctx->font_bits == NULL) { + goto fail; + } + RtlMemCpy(ctx->font_bits, font, ctx->font_bits_size); + } else { + ctx->font_width = font_width = 8; + ctx->font_height = font_height = 16; + ctx->font_bits_size = FONT_BYTES; + font_spacing = 1; + ctx->font_bits = _malloc(ctx->font_bits_size); + if (ctx->font_bits == NULL) { + goto fail; + } + RtlMemCpy(ctx->font_bits, builtin_font, ctx->font_bits_size); + } + +#undef FONT_BYTES + + ctx->font_width += font_spacing; + + ctx->font_bool_size = FLANTERM_FB_FONT_GLYPHS * font_height * ctx->font_width * sizeof(bool); + ctx->font_bool = _malloc(ctx->font_bool_size); + if (ctx->font_bool == NULL) { + goto fail; + } + + for (USIZE i = 0; i < FLANTERM_FB_FONT_GLYPHS; i++) { + UCHAR *glyph = &ctx->font_bits[i * font_height]; + + for (USIZE y = 0; y < font_height; y++) { + // NOTE: the characters in VGA fonts are always one byte wide. + // 9 dot wide fonts have 8 dots and one empty column, except + // characters 0xC0-0xDF replicate column 9. + for (USIZE x = 0; x < 8; x++) { + USIZE offset = i * font_height * ctx->font_width + y * ctx->font_width + x; + + if ((glyph[y] & (0x80 >> x))) { + ctx->font_bool[offset] = true; + } else { + ctx->font_bool[offset] = false; + } + } + // fill columns above 8 like VGA Line Graphics Mode does + for (USIZE x = 8; x < ctx->font_width; x++) { + USIZE offset = i * font_height * ctx->font_width + y * ctx->font_width + x; + + if (i >= 0xc0 && i <= 0xdf) { + ctx->font_bool[offset] = (glyph[y] & 1); + } else { + ctx->font_bool[offset] = false; + } + } + } + } + + ctx->font_scale_x = font_scale_x; + ctx->font_scale_y = font_scale_y; + + ctx->glyph_width = ctx->font_width * font_scale_x; + ctx->glyph_height = font_height * font_scale_y; + + _ctx->cols = (ctx->width - margin * 2) / ctx->glyph_width; + _ctx->rows = (ctx->height - margin * 2) / ctx->glyph_height; + + ctx->offset_x = margin + ((ctx->width - margin * 2) % ctx->glyph_width) / 2; + ctx->offset_y = margin + ((ctx->height - margin * 2) % ctx->glyph_height) / 2; + + ctx->grid_size = _ctx->rows * _ctx->cols * sizeof(struct flanterm_fb_char); + ctx->grid = _malloc(ctx->grid_size); + if (ctx->grid == NULL) { + goto fail; + } + for (USIZE i = 0; i < _ctx->rows * _ctx->cols; i++) { + ctx->grid[i].c = ' '; + ctx->grid[i].fg = ctx->text_fg; + ctx->grid[i].bg = ctx->text_bg; + } + + ctx->queue_size = _ctx->rows * _ctx->cols * sizeof(struct flanterm_fb_queue_item); + ctx->queue = _malloc(ctx->queue_size); + if (ctx->queue == NULL) { + goto fail; + } + ctx->queue_i = 0; + RtlMemSet(ctx->queue, 0, ctx->queue_size); + + ctx->map_size = _ctx->rows * _ctx->cols * sizeof(struct flanterm_fb_queue_item *); + ctx->map = _malloc(ctx->map_size); + if (ctx->map == NULL) { + goto fail; + } + RtlMemSet(ctx->map, 0, ctx->map_size); + + if (canvas != NULL) { + ctx->canvas_size = ctx->width * ctx->height * sizeof(ULONG); + ctx->canvas = _malloc(ctx->canvas_size); + if (ctx->canvas == NULL) { + goto fail; + } + for (USIZE i = 0; i < ctx->width * ctx->height; i++) { + ctx->canvas[i] = convert_colour(_ctx, canvas[i]); + } + } + + if (font_scale_x == 1 && font_scale_y == 1) { + if (canvas == NULL) { + ctx->plot_char = plot_char_unscaled_uncanvas; + } else { + ctx->plot_char = plot_char_unscaled_canvas; + } + } else { + if (canvas == NULL) { + ctx->plot_char = plot_char_scaled_uncanvas; + } else { + ctx->plot_char = plot_char_scaled_canvas; + } + } + + _ctx->raw_putchar = flanterm_fb_raw_putchar; + _ctx->clear = flanterm_fb_clear; + _ctx->set_cursor_pos = flanterm_fb_set_cursor_pos; + _ctx->get_cursor_pos = flanterm_fb_get_cursor_pos; + _ctx->set_text_fg = flanterm_fb_set_text_fg; + _ctx->set_text_bg = flanterm_fb_set_text_bg; + _ctx->set_text_fg_bright = flanterm_fb_set_text_fg_bright; + _ctx->set_text_bg_bright = flanterm_fb_set_text_bg_bright; + _ctx->set_text_fg_rgb = flanterm_fb_set_text_fg_rgb; + _ctx->set_text_bg_rgb = flanterm_fb_set_text_bg_rgb; + _ctx->set_text_fg_default = flanterm_fb_set_text_fg_default; + _ctx->set_text_bg_default = flanterm_fb_set_text_bg_default; + _ctx->set_text_fg_default_bright = flanterm_fb_set_text_fg_default_bright; + _ctx->set_text_bg_default_bright = flanterm_fb_set_text_bg_default_bright; + _ctx->move_character = flanterm_fb_move_character; + _ctx->scroll = flanterm_fb_scroll; + _ctx->revscroll = flanterm_fb_revscroll; + _ctx->swap_palette = flanterm_fb_swap_palette; + _ctx->save_state = flanterm_fb_save_state; + _ctx->restore_state = flanterm_fb_restore_state; + _ctx->double_buffer_flush = flanterm_fb_double_buffer_flush; + _ctx->full_refresh = flanterm_fb_full_refresh; + _ctx->deinit = flanterm_fb_deinit; + + flanterm_context_reinit(_ctx); + flanterm_fb_full_refresh(_ctx); + +#ifndef FLANTERM_FB_DISABLE_BUMP_ALLOC + if (_malloc == bump_alloc) { + bump_allocated_instance = true; + } +#endif + + return _ctx; + +fail: + if (ctx == NULL) { + return NULL; + } + +#ifndef FLANTERM_FB_DISABLE_BUMP_ALLOC + if (_malloc == bump_alloc) { + bump_alloc_ptr = 0; + return NULL; + } +#endif + + if (_free == NULL) { + return NULL; + } + + if (ctx->canvas != NULL) { + _free(ctx->canvas, ctx->canvas_size); + } + if (ctx->map != NULL) { + _free(ctx->map, ctx->map_size); + } + if (ctx->queue != NULL) { + _free(ctx->queue, ctx->queue_size); + } + if (ctx->grid != NULL) { + _free(ctx->grid, ctx->grid_size); + } + if (ctx->font_bool != NULL) { + _free(ctx->font_bool, ctx->font_bool_size); + } + if (ctx->font_bits != NULL) { + _free(ctx->font_bits, ctx->font_bits_size); + } + if (ctx != NULL) { + _free(ctx, sizeof(struct flanterm_fb_context)); + } + + return NULL; +} + +void flanterm_fb_set_flush_callback(struct flanterm_context *_ctx, void (*flush_callback)(volatile void *address, USIZE length)) { + struct flanterm_fb_context *ctx = (void *)_ctx; + ctx->flush_callback = flush_callback; +} diff --git a/paw/stos/xt/flanterm/src/flanterm_backends/fb.h b/paw/stos/xt/flanterm/src/flanterm_backends/fb.h new file mode 100644 index 0000000..6d9b28c --- /dev/null +++ b/paw/stos/xt/flanterm/src/flanterm_backends/fb.h @@ -0,0 +1,77 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/* Copyright (C) 2022-2026 Mintsuki and contributors. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef FLANTERM_FB_H +#define FLANTERM_FB_H 1 + +#include + +#ifdef __cplusplus +extern "C" { +#endif + +#include "../flanterm.h" + +#ifdef FLANTERM_IN_FLANTERM + +#include "fb_private.h" + +#endif + +#define FLANTERM_FB_ROTATE_0 0 +#define FLANTERM_FB_ROTATE_90 1 +#define FLANTERM_FB_ROTATE_180 2 +#define FLANTERM_FB_ROTATE_270 3 + +struct flanterm_context *flanterm_fb_init( + /* If _malloc and _free are nulled, use the bump allocated instance (1 use only). */ + void *(*_malloc)(USIZE size), + void (*_free)(void *ptr, USIZE size), + ULONG *framebuffer, USIZE width, USIZE height, USIZE pitch, + UCHAR red_mask_size, UCHAR red_mask_shift, + UCHAR green_mask_size, UCHAR green_mask_shift, + UCHAR blue_mask_size, UCHAR blue_mask_shift, + ULONG *canvas, /* If nulled, no canvas. */ + ULONG *ansi_colours, ULONG *ansi_bright_colours, /* If nulled, default. */ + ULONG *default_bg, ULONG *default_fg, /* If nulled, default. */ + ULONG *default_bg_bright, ULONG *default_fg_bright, /* If nulled, default. */ + /* If font is null, use default font and font_width and font_height ignored. */ + void *font, USIZE font_width, USIZE font_height, USIZE font_spacing, + /* If scale_x and scale_y are 0, automatically scale font based on resolution. */ + USIZE font_scale_x, USIZE font_scale_y, + USIZE margin, + /* One of FLANTERM_FB_ROTATE_* values. */ + int rotation +); + +void flanterm_fb_set_flush_callback(struct flanterm_context *ctx, void (*flush_callback)(volatile void *address, USIZE length)); + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/paw/stos/xt/flanterm/src/flanterm_backends/fb_private.h b/paw/stos/xt/flanterm/src/flanterm_backends/fb_private.h new file mode 100644 index 0000000..101fa70 --- /dev/null +++ b/paw/stos/xt/flanterm/src/flanterm_backends/fb_private.h @@ -0,0 +1,124 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/* Copyright (C) 2022-2026 Mintsuki and contributors. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef FLANTERM_FB_PRIVATE_H +#define FLANTERM_FB_PRIVATE_H 1 + +#ifndef FLANTERM_IN_FLANTERM +#error "Do not use fb_private.h. Use interfaces defined in fb.h only." +#endif + +#include + +#ifdef __cplusplus +extern "C" { +#endif + +#define FLANTERM_FB_FONT_GLYPHS 256 + +struct flanterm_fb_char { + ULONG c; + ULONG fg; + ULONG bg; +}; + +struct flanterm_fb_queue_item { + USIZE x, y; + struct flanterm_fb_char c; +}; + +struct flanterm_fb_context { + struct flanterm_context term; + + void (*plot_char)(struct flanterm_context *ctx, struct flanterm_fb_char *c, USIZE x, USIZE y); + void (*flush_callback)(volatile void *address, USIZE length); + + USIZE font_width; + USIZE font_height; + USIZE glyph_width; + USIZE glyph_height; + + USIZE font_scale_x; + USIZE font_scale_y; + + USIZE offset_x, offset_y; + + volatile ULONG *framebuffer; + USIZE pitch; + USIZE width; + USIZE height; + USIZE bpp; + + UCHAR red_mask_size, red_mask_shift; + UCHAR green_mask_size, green_mask_shift; + UCHAR blue_mask_size, blue_mask_shift; + + int rotation; + + USIZE font_bits_size; + UCHAR *font_bits; + USIZE font_bool_size; + bool *font_bool; + + ULONG ansi_colours[8]; + ULONG ansi_bright_colours[8]; + ULONG default_fg, default_bg; + ULONG default_fg_bright, default_bg_bright; + + USIZE canvas_size; + ULONG *canvas; + + USIZE grid_size; + USIZE queue_size; + USIZE map_size; + + struct flanterm_fb_char *grid; + + struct flanterm_fb_queue_item *queue; + USIZE queue_i; + + struct flanterm_fb_queue_item **map; + + ULONG text_fg; + ULONG text_bg; + USIZE cursor_x; + USIZE cursor_y; + + ULONG saved_state_text_fg; + ULONG saved_state_text_bg; + USIZE saved_state_cursor_x; + USIZE saved_state_cursor_y; + + USIZE old_cursor_x; + USIZE old_cursor_y; +}; + +#ifdef __cplusplus +} +#endif + +#endif diff --git a/paw/stos/xt/flanterm/src/flanterm_private.h b/paw/stos/xt/flanterm/src/flanterm_private.h new file mode 100644 index 0000000..6eefbea --- /dev/null +++ b/paw/stos/xt/flanterm/src/flanterm_private.h @@ -0,0 +1,123 @@ +/* SPDX-License-Identifier: BSD-2-Clause */ + +/* Copyright (C) 2022-2026 Mintsuki and contributors. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions are met: + * + * 1. Redistributions of source code must retain the above copyright notice, + * this list of conditions and the following disclaimer. + * + * 2. Redistributions in binary form must reproduce the above copyright notice, + * this list of conditions and the following disclaimer in the documentation + * and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" + * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE + * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR + * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF + * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS + * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN + * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) + * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + */ + +#ifndef FLANTERM_PRIVATE_H +#define FLANTERM_PRIVATE_H 1 + +#ifndef FLANTERM_IN_FLANTERM +#error "Do not use flanterm_private.h. Use interfaces defined in flanterm.h only." +#endif + +#include + +#ifdef __cplusplus +extern "C" { +#endif + +#define FLANTERM_MAX_ESC_VALUES 16 + +struct flanterm_context { + /* internal use */ + + USIZE tab_size; + bool autoflush; + bool cursor_enabled; + bool scroll_enabled; + bool control_sequence; + bool escape; + bool osc; + bool osc_escape; + bool rrr; + bool discard_next; + bool bold; + bool bg_bold; + bool reverse_video; + bool dec_private; + bool insert_mode; + bool csi_unhandled; + UQUAD code_point; + USIZE unicode_remaining; + UCHAR g_select; + UCHAR charsets[2]; + USIZE current_charset; + USIZE escape_offset; + USIZE esc_values_i; + USIZE saved_cursor_x; + USIZE saved_cursor_y; + USIZE current_primary; + USIZE current_bg; + USIZE scroll_top_margin; + USIZE scroll_bottom_margin; + ULONG esc_values[FLANTERM_MAX_ESC_VALUES]; + UQUAD oob_output; + bool saved_state_bold; + bool saved_state_bg_bold; + bool saved_state_reverse_video; + USIZE saved_state_current_charset; + USIZE saved_state_current_primary; + USIZE saved_state_current_bg; + + /* to be set by backend */ + + USIZE rows, cols; + + void (*raw_putchar)(struct flanterm_context *, UCHAR c); + void (*clear)(struct flanterm_context *, bool move); + void (*set_cursor_pos)(struct flanterm_context *, USIZE x, USIZE y); + void (*get_cursor_pos)(struct flanterm_context *, USIZE *x, USIZE *y); + void (*set_text_fg)(struct flanterm_context *, USIZE fg); + void (*set_text_bg)(struct flanterm_context *, USIZE bg); + void (*set_text_fg_bright)(struct flanterm_context *, USIZE fg); + void (*set_text_bg_bright)(struct flanterm_context *, USIZE bg); + void (*set_text_fg_rgb)(struct flanterm_context *, ULONG fg); + void (*set_text_bg_rgb)(struct flanterm_context *, ULONG bg); + void (*set_text_fg_default)(struct flanterm_context *); + void (*set_text_bg_default)(struct flanterm_context *); + void (*set_text_fg_default_bright)(struct flanterm_context *); + void (*set_text_bg_default_bright)(struct flanterm_context *); + void (*move_character)(struct flanterm_context *, USIZE new_x, USIZE new_y, USIZE old_x, USIZE old_y); + void (*scroll)(struct flanterm_context *); + void (*revscroll)(struct flanterm_context *); + void (*swap_palette)(struct flanterm_context *); + void (*save_state)(struct flanterm_context *); + void (*restore_state)(struct flanterm_context *); + void (*double_buffer_flush)(struct flanterm_context *); + void (*full_refresh)(struct flanterm_context *); + void (*deinit)(struct flanterm_context *, void (*)(void *, USIZE)); + + /* to be set by client */ + + void (*callback)(struct flanterm_context *, UQUAD, UQUAD, UQUAD, UQUAD); +}; + +void flanterm_context_reinit(struct flanterm_context *ctx); + +#ifdef __cplusplus +} +#endif + +#endif