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mop3/kernel/Flanterm/src/flanterm_backends/fb.c
kamkow1 f07e920270
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Minimal device system, implement terminal device and libterminal
2026-02-12 15:49:04 +01:00

1366 lines
59 KiB
C
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/* 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)
#define ALWAYS_INLINE __forceinline
#elif defined(__GNUC__) || defined(__clang__)
#define ALWAYS_INLINE __attribute__ ((always_inline)) inline
#else
#define ALWAYS_INLINE inline
#endif
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#ifndef FLANTERM_IN_FLANTERM
#define FLANTERM_IN_FLANTERM
#endif
#include "../flanterm.h"
#include "fb.h"
void* memset (void*, int, size_t);
void* memcpy (void*, const void*, size_t);
#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 uint8_t bump_alloc_pool[FLANTERM_FB_BUMP_ALLOC_POOL_SIZE];
static size_t bump_alloc_ptr = 0;
static bool bump_alloc_base_offset_added = false;
static void* bump_alloc (size_t s) {
if (!bump_alloc_base_offset_added) {
if ((uintptr_t)bump_alloc_pool & 0xf) {
bump_alloc_ptr += 0x10 - ((uintptr_t)bump_alloc_pool & 0xf);
}
bump_alloc_base_offset_added = true;
}
if ((s & 0xf) != 0) {
s += 0x10;
s &= ~(size_t)0xf;
}
size_t 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 uint8_t builtin_font[] = {
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0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00,
0x36, 0x36, 0x36, 0x36, 0x36, 0xf7, 0xf7, 0x00, 0x00, 0xf7, 0xf7, 0x36, 0x36, 0x36, 0x36, 0x36,
0x18, 0x18, 0x18, 0x18, 0x18, 0xff, 0xff, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00,
0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0x00, 0x00, 0xff, 0xff, 0x18, 0x18, 0x18, 0x18, 0x18,
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0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0xff, 0xff, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36, 0x36,
0x18, 0x18, 0x18, 0x18, 0x18, 0xff, 0xff, 0x18, 0x18, 0xff, 0xff, 0x18, 0x18, 0x18, 0x18, 0x18,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
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0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0xd8, 0xd8, 0x70, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x30, 0x30, 0x00, 0xfc, 0x00, 0x30, 0x30, 0x00, 0x00, 0x00, 0x00, 0x00,
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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 uint32_t convert_colour (struct flanterm_context* _ctx, uint32_t colour) {
struct flanterm_fb_context* ctx = (void*)_ctx;
uint32_t r = (colour >> 16) & 0xff;
uint32_t g = (colour >> 8) & 0xff;
uint32_t b = colour & 0xff;
uint32_t ret =
(r << ctx->red_mask_shift) | (g << ctx->green_mask_shift) | (b << ctx->blue_mask_shift);
if (ctx->red_mask_size > 8) {
ret |= (r >> (16 - ctx->red_mask_size)) << (ctx->red_mask_shift + 8);
}
if (ctx->green_mask_size > 8) {
ret |= (g >> (16 - ctx->green_mask_size)) << (ctx->green_mask_shift + 8);
}
if (ctx->blue_mask_size > 8) {
ret |= (b >> (16 - ctx->blue_mask_size)) << (ctx->blue_mask_shift + 8);
}
return ret;
}
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;
uint32_t tmp = ctx->text_bg;
ctx->text_bg = ctx->text_fg;
ctx->text_fg = tmp;
if (ctx->text_fg == 0xffffffff) {
ctx->text_fg = ctx->default_bg;
}
if (ctx->text_bg == ctx->default_bg) {
ctx->text_bg = 0xffffffff;
}
}
static void plot_char_scaled_canvas (struct flanterm_context* _ctx, struct flanterm_fb_char* c,
size_t x, size_t 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 uint32_t* 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 (size_t gy = 0; gy < ctx->glyph_height; gy++) {
uint8_t fy = gy / ctx->font_scale_y;
volatile uint32_t* fb_line = dest;
uint32_t* canvas_line = ctx->canvas + x + (y + gy) * ctx->width;
bool* glyph_pointer = glyph + (fy * ctx->font_width);
for (size_t fx = 0; fx < ctx->font_width; fx++) {
for (size_t i = 0; i < ctx->font_scale_x; i++) {
size_t gx = ctx->font_scale_x * fx + i;
uint32_t bg = c->bg == 0xffffffff ? canvas_line[gx] : c->bg;
uint32_t 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,
size_t x, size_t y) {
struct flanterm_fb_context* ctx = (void*)_ctx;
if (x >= _ctx->cols || y >= _ctx->rows) {
return;
}
uint32_t default_bg = ctx->default_bg;
uint32_t bg = c->bg == 0xffffffff ? default_bg : c->bg;
uint32_t fg = c->fg == 0xffffffff ? ctx->default_fg : 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 uint32_t* 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 (size_t gy = 0; gy < ctx->glyph_height; gy++) {
uint8_t fy = gy / ctx->font_scale_y;
volatile uint32_t* fb_line = dest;
bool* glyph_pointer = glyph + (fy * ctx->font_width);
for (size_t fx = 0; fx < ctx->font_width; fx++) {
for (size_t 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,
size_t x, size_t 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 uint32_t* 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 (size_t gy = 0; gy < ctx->glyph_height; gy++) {
volatile uint32_t* fb_line = dest;
uint32_t* canvas_line = ctx->canvas + x + (y + gy) * ctx->width;
bool* glyph_pointer = glyph + (gy * ctx->font_width);
for (size_t fx = 0; fx < ctx->font_width; fx++) {
uint32_t bg = c->bg == 0xffffffff ? canvas_line[fx] : c->bg;
uint32_t 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,
size_t x, size_t y) {
struct flanterm_fb_context* ctx = (void*)_ctx;
if (x >= _ctx->cols || y >= _ctx->rows) {
return;
}
uint32_t default_bg = ctx->default_bg;
uint32_t bg = c->bg == 0xffffffff ? default_bg : c->bg;
uint32_t fg = c->fg == 0xffffffff ? ctx->default_fg : 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 uint32_t* 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 (size_t gy = 0; gy < ctx->glyph_height; gy++) {
volatile uint32_t* fb_line = dest;
bool* glyph_pointer = glyph + (gy * ctx->font_width);
for (size_t 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, size_t x,
size_t y) {
struct flanterm_fb_context* ctx = (void*)_ctx;
if (x >= _ctx->cols || y >= _ctx->rows) {
return;
}
size_t 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;
}
if (ctx->queue_i == _ctx->rows * _ctx->cols) {
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;
size_t start = _ctx->scroll_top_margin * _ctx->cols;
size_t end = (_ctx->scroll_bottom_margin - 1) * _ctx->cols;
for (size_t i = end; i > start;) {
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 first line of the screen.
struct flanterm_fb_char empty;
empty.c = ' ';
empty.fg = ctx->text_fg;
empty.bg = ctx->text_bg;
for (size_t 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 (size_t 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 (size_t 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 (size_t 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, size_t x, size_t y) {
struct flanterm_fb_context* ctx = (void*)_ctx;
if (x >= _ctx->cols) {
if (x > SIZE_MAX / 2) {
x = 0;
} else {
x = _ctx->cols - 1;
}
}
if (y >= _ctx->rows) {
if (y > SIZE_MAX / 2) {
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, size_t* x, size_t* 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, size_t new_x, size_t new_y,
size_t old_x, size_t 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;
}
size_t 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, size_t 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, size_t 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, size_t 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, size_t 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, uint32_t 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, uint32_t 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;
}
size_t 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];
}
uint32_t 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 (size_t i = 0; i < ctx->queue_i; i++) {
struct flanterm_fb_queue_item* q = &ctx->queue[i];
size_t 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->phys_height);
}
}
static void flanterm_fb_raw_putchar (struct flanterm_context* _ctx, uint8_t c) {
struct flanterm_fb_context* ctx = (void*)_ctx;
if (ctx->cursor_x >= _ctx->cols) {
if (_ctx->wrap_enabled &&
(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->rows) {
ctx->cursor_y = _ctx->rows - 1;
}
} else {
ctx->cursor_x = _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;
uint32_t default_bg = ctx->default_bg;
for (size_t y = 0; y < ctx->height; y++) {
for (size_t x = 0; x < ctx->width; x++) {
size_t 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 (uint32_t)) + px] =
ctx->canvas[y * ctx->width + x];
} else {
ctx->framebuffer[py * (ctx->pitch / sizeof (uint32_t)) + px] = default_bg;
}
}
}
for (size_t i = 0; i < (size_t)_ctx->rows * _ctx->cols; i++) {
size_t x = i % _ctx->cols;
size_t 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->phys_height);
}
}
static void flanterm_fb_deinit (struct flanterm_context* _ctx, void (*_free) (void*, size_t)) {
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_alloc_base_offset_added = false;
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) (size_t), void (*_free) (void*, size_t), uint32_t* framebuffer,
size_t width, size_t height, size_t pitch, uint8_t red_mask_size,
uint8_t red_mask_shift, uint8_t green_mask_size, uint8_t green_mask_shift,
uint8_t blue_mask_size, uint8_t blue_mask_shift, uint32_t* canvas,
uint32_t* ansi_colours, uint32_t* ansi_bright_colours, uint32_t* default_bg,
uint32_t* default_fg, uint32_t* default_bg_bright, uint32_t* default_fg_bright,
void* font, size_t font_width, size_t font_height, size_t font_spacing,
size_t font_scale_x, size_t font_scale_y, size_t margin, int rotation) {
size_t phys_height = height;
if (rotation == FLANTERM_FB_ROTATE_90 || rotation == FLANTERM_FB_ROTATE_270) {
size_t 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) {
size_t width_limit = width > FLANTERM_FB_WIDTH_LIMIT ? FLANTERM_FB_WIDTH_LIMIT : width;
size_t height_limit = height > FLANTERM_FB_HEIGHT_LIMIT ? FLANTERM_FB_HEIGHT_LIMIT : height;
framebuffer = (uint32_t*)((uintptr_t)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;
memset (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 (size_t 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 (size_t 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->phys_height = phys_height;
ctx->pitch = pitch;
// VGA fonts are always one byte per scanline regardless of font_width
#define FONT_BYTES (font_height * FLANTERM_FB_FONT_GLYPHS)
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;
}
memcpy (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;
}
memcpy (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 (size_t i = 0; i < FLANTERM_FB_FONT_GLYPHS; i++) {
uint8_t* glyph = &ctx->font_bits[i * font_height];
for (size_t 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 (size_t x = 0; x < 8; x++) {
size_t 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 (size_t x = 8; x < ctx->font_width; x++) {
size_t 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 (size_t 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;
memset (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;
}
memset (ctx->map, 0, ctx->map_size);
if (canvas != NULL) {
ctx->canvas_size = ctx->width * ctx->height * sizeof (uint32_t);
ctx->canvas = _malloc (ctx->canvas_size);
if (ctx->canvas == NULL) {
goto fail;
}
for (size_t 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,
size_t length)) {
struct flanterm_fb_context* ctx = (void*)_ctx;
ctx->flush_callback = flush_callback;
}
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