commit 0d2f55bae5c6321353806bb440e335a9656eff03 · pci.express/flanterm.zig

+567

backends/framebuffer.c

···

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       #include <stdint.h>

     

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       #include <stddef.h>

     

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       #include "../term.h"

     

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       #include "framebuffer.h"

     

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       void *memset(void *, int, size_t);

     

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       void *memcpy(void *, const void *, size_t);

     

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       static void fbterm_swap_palette(struct term_context *_ctx) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           uint32_t tmp = ctx->text_bg;

     

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           ctx->text_bg = ctx->text_fg;

     

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           ctx->text_fg = tmp;

     

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       }

     

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       static void plot_char(struct term_context *_ctx, struct fbterm_char *c, size_t x, size_t y) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           if (x >= _ctx->cols || y >= _ctx->rows) {

     

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               return;

     

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           }

     

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           x = ctx->offset_x + x * ctx->glyph_width;

     

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           y = ctx->offset_y + y * ctx->glyph_height;

     

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           bool *glyph = &ctx->font_bool[c->c * ctx->font_height * ctx->font_width];

     

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           // naming: fx,fy for font coordinates, gx,gy for glyph coordinates

     

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           for (size_t gy = 0; gy < ctx->glyph_height; gy++) {

     

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               uint8_t fy = gy / ctx->font_scale_y;

     

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               volatile uint32_t *fb_line = ctx->framebuffer + x + (y + gy) * (ctx->pitch / 4);

     

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               uint32_t *canvas_line = ctx->canvas + x + (y + gy) * ctx->width;

     

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               for (size_t fx = 0; fx < ctx->font_width; fx++) {

     

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                   bool draw = glyph[fy * ctx->font_width + fx];

     

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                   for (size_t i = 0; i < ctx->font_scale_x; i++) {

     

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                       size_t gx = ctx->font_scale_x * fx + i;

     

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                       uint32_t bg = c->bg == 0xffffffff ? canvas_line[gx] : c->bg;

     

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                       uint32_t fg = c->fg == 0xffffffff ? canvas_line[gx] : c->fg;

     

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                       fb_line[gx] = draw ? fg : bg;

     

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                   }

     

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               }

     

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           }

     

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       }

     

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       static void plot_char_fast(struct term_context *_ctx, struct fbterm_char *old, struct fbterm_char *c, size_t x, size_t y) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           if (x >= _ctx->cols || y >= _ctx->rows) {

     

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               return;

     

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           }

     

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           x = ctx->offset_x + x * ctx->glyph_width;

     

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           y = ctx->offset_y + y * ctx->glyph_height;

     

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           bool *new_glyph = &ctx->font_bool[c->c * ctx->font_height * ctx->font_width];

     

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           bool *old_glyph = &ctx->font_bool[old->c * ctx->font_height * ctx->font_width];

     

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           for (size_t gy = 0; gy < ctx->glyph_height; gy++) {

     

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               uint8_t fy = gy / ctx->font_scale_y;

     

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               volatile uint32_t *fb_line = ctx->framebuffer + x + (y + gy) * (ctx->pitch / 4);

     

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               uint32_t *canvas_line = ctx->canvas + x + (y + gy) * ctx->width;

     

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               for (size_t fx = 0; fx < ctx->font_width; fx++) {

     

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                   bool old_draw = old_glyph[fy * ctx->font_width + fx];

     

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                   bool new_draw = new_glyph[fy * ctx->font_width + fx];

     

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                   if (old_draw == new_draw)

     

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                       continue;

     

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                   for (size_t i = 0; i < ctx->font_scale_x; i++) {

     

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                       size_t gx = ctx->font_scale_x * fx + i;

     

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                       uint32_t bg = c->bg == 0xffffffff ? canvas_line[gx] : c->bg;

     

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                       uint32_t fg = c->fg == 0xffffffff ? canvas_line[gx] : c->fg;

     

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                       fb_line[gx] = new_draw ? fg : bg;

     

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                   }

     

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               }

     

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           }

     

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       }

     

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       static inline bool compare_char(struct fbterm_char *a, struct fbterm_char *b) {

     

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           return !(a->c != b->c || a->bg != b->bg || a->fg != b->fg);

     

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       }

     

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       static void push_to_queue(struct term_context *_ctx, struct fbterm_char *c, size_t x, size_t y) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           if (x >= _ctx->cols || y >= _ctx->rows) {

     

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               return;

     

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           }

     

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           size_t i = y * _ctx->cols + x;

     

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           struct fbterm_queue_item *q = ctx->map[i];

     

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           if (q == NULL) {

     

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               if (compare_char(&ctx->grid[i], c)) {

     

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                   return;

     

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               }

     

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               q = &ctx->queue[ctx->queue_i++];

     

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               q->x = x;

     

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               q->y = y;

     

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               ctx->map[i] = q;

     

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           }

     

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           q->c = *c;

     

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       }

     

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       static void fbterm_revscroll(struct term_context *_ctx) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           for (size_t i = (_ctx->scroll_bottom_margin - 1) * _ctx->cols - 1; ; i--) {

     

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               struct fbterm_char *c;

     

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               struct fbterm_queue_item *q = ctx->map[i];

     

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               if (q != NULL) {

     

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                   c = &q->c;

     

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               } else {

     

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                   c = &ctx->grid[i];

     

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               }

     

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               push_to_queue(_ctx, c, (i + _ctx->cols) % _ctx->cols, (i + _ctx->cols) / _ctx->cols);

     

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               if (i == _ctx->scroll_top_margin * _ctx->cols) {

     

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                   break;

     

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               }

     

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           }

     

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           // Clear the first line of the screen.

     

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           struct fbterm_char empty;

     

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           empty.c  = ' ';

     

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           empty.fg = ctx->text_fg;

     

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           empty.bg = ctx->text_bg;

     

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           for (size_t i = _ctx->scroll_top_margin * _ctx->cols;

     

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                i < (_ctx->scroll_top_margin + 1) * _ctx->cols; i++) {

     

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               push_to_queue(_ctx, &empty, i % _ctx->cols, i / _ctx->cols);

     

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           }

     

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       }

     

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       static void fbterm_scroll(struct term_context *_ctx) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           for (size_t i = (_ctx->scroll_top_margin + 1) * _ctx->cols;

     

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                i < _ctx->scroll_bottom_margin * _ctx->cols; i++) {

     

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               struct fbterm_char *c;

     

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               struct fbterm_queue_item *q = ctx->map[i];

     

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               if (q != NULL) {

     

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                   c = &q->c;

     

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               } else {

     

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                   c = &ctx->grid[i];

     

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               }

     

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               push_to_queue(_ctx, c, (i - _ctx->cols) % _ctx->cols, (i - _ctx->cols) / _ctx->cols);

     

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           }

     

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           // Clear the last line of the screen.

     

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           struct fbterm_char empty;

     

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           empty.c  = ' ';

     

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           empty.fg = ctx->text_fg;

     

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           empty.bg = ctx->text_bg;

     

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           for (size_t i = (_ctx->scroll_bottom_margin - 1) * _ctx->cols;

     

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                i < _ctx->scroll_bottom_margin * _ctx->cols; i++) {

     

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               push_to_queue(_ctx, &empty, i % _ctx->cols, i / _ctx->cols);

     

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           }

     

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       }

     

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       static void fbterm_clear(struct term_context *_ctx, bool move) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           struct fbterm_char empty;

     

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           empty.c  = ' ';

     

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           empty.fg = ctx->text_fg;

     

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           empty.bg = ctx->text_bg;

     

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           for (size_t i = 0; i < _ctx->rows * _ctx->cols; i++) {

     

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               push_to_queue(_ctx, &empty, i % _ctx->cols, i / _ctx->cols);

     

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           }

     

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           if (move) {

     

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               ctx->cursor_x = 0;

     

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               ctx->cursor_y = 0;

     

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           }

     

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       }

     

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       static void fbterm_enable_cursor(struct term_context *_ctx) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           ctx->cursor_status = true;

     

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       }

     

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       static bool fbterm_disable_cursor(struct term_context *_ctx) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           bool ret = ctx->cursor_status;

     

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           ctx->cursor_status = false;

     

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           return ret;

     

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       }

     

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       static void fbterm_set_cursor_pos(struct term_context *_ctx, size_t x, size_t y) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           if (x >= _ctx->cols) {

     

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               if ((int)x < 0) {

     

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                   x = 0;

     

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               } else {

     

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                   x = _ctx->cols - 1;

     

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               }

     

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           }

     

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           if (y >= _ctx->rows) {

     

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               if ((int)y < 0) {

     

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                   y = 0;

     

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               } else {

     

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                   y = _ctx->rows - 1;

     

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               }

     

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           }

     

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           ctx->cursor_x = x;

     

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           ctx->cursor_y = y;

     

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       }

     

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       static void fbterm_get_cursor_pos(struct term_context *_ctx, size_t *x, size_t *y) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           *x = ctx->cursor_x;

     

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           *y = ctx->cursor_y;

     

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       }

     

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       static void fbterm_move_character(struct term_context *_ctx, size_t new_x, size_t new_y, size_t old_x, size_t old_y) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           if (old_x >= _ctx->cols || old_y >= _ctx->rows

     

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            || new_x >= _ctx->cols || new_y >= _ctx->rows) {

     

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               return;

     

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           }

     

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           size_t i = old_x + old_y * _ctx->cols;

     

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           struct fbterm_char *c;

     

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           struct fbterm_queue_item *q = ctx->map[i];

     

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           if (q != NULL) {

     

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               c = &q->c;

     

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           } else {

     

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               c = &ctx->grid[i];

     

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           }

     

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           push_to_queue(_ctx, c, new_x, new_y);

     

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       }

     

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       static void fbterm_set_text_fg(struct term_context *_ctx, size_t fg) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           ctx->text_fg = ctx->ansi_colours[fg];

     

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       }

     

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       static void fbterm_set_text_bg(struct term_context *_ctx, size_t bg) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           ctx->text_bg = ctx->ansi_colours[bg];

     

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       }

     

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       static void fbterm_set_text_fg_bright(struct term_context *_ctx, size_t fg) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           ctx->text_fg = ctx->ansi_bright_colours[fg];

     

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       }

     

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       static void fbterm_set_text_bg_bright(struct term_context *_ctx, size_t bg) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           ctx->text_bg = ctx->ansi_bright_colours[bg];

     

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       }

     

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       static void fbterm_set_text_fg_rgb(struct term_context *_ctx, uint32_t fg) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           ctx->text_fg = fg;

     

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       }

     

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       static void fbterm_set_text_bg_rgb(struct term_context *_ctx, uint32_t bg) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           ctx->text_bg = bg;

     

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       }

     

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       static void fbterm_set_text_fg_default(struct term_context *_ctx) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           ctx->text_fg = ctx->default_fg;

     

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       }

     

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       static void fbterm_set_text_bg_default(struct term_context *_ctx) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           ctx->text_bg = 0xffffffff;

     

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       }

     

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       static void draw_cursor(struct term_context *_ctx) {

     

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           struct fbterm_context *ctx = (void *)_ctx;

     

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           size_t i = ctx->cursor_x + ctx->cursor_y * _ctx->cols;

     

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           struct fbterm_char c;

     

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           struct fbterm_queue_item *q = ctx->map[i];

     

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           if (q != NULL) {

     

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               c = q->c;

     

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           } else {

     

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               c = ctx->grid[i];

     

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           }

     

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           uint32_t tmp = c.fg;

     

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           c.fg = c.bg;

     

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           c.bg = tmp;

     

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           plot_char(_ctx, &c, ctx->cursor_x, ctx->cursor_y);

     

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           if (q != NULL) {

     

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               ctx->grid[i] = q->c;

     

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               ctx->map[i] = NULL;

     

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           }

     

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       }

     

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       static void fbterm_double_buffer_flush(struct term_context *_ctx) {

     

       308
       308
       +
           struct fbterm_context *ctx = (void *)_ctx;

     

       309
       309
       +
       

     

       310
       310
       +
           if (ctx->cursor_status) {

     

       311
       311
       +
               draw_cursor(_ctx);

     

       312
       312
       +
           }

     

       313
       313
       +
       

     

       314
       314
       +
           for (size_t i = 0; i < ctx->queue_i; i++) {

     

       315
       315
       +
               struct fbterm_queue_item *q = &ctx->queue[i];

     

       316
       316
       +
               size_t offset = q->y * _ctx->cols + q->x;

     

       317
       317
       +
               if (ctx->map[offset] == NULL) {

     

       318
       318
       +
                   continue;

     

       319
       319
       +
               }

     

       320
       320
       +
               struct fbterm_char *old = &ctx->grid[offset];

     

       321
       321
       +
               if (q->c.bg == old->bg && q->c.fg == old->fg) {

     

       322
       322
       +
                   plot_char_fast(_ctx, old, &q->c, q->x, q->y);

     

       323
       323
       +
               } else {

     

       324
       324
       +
                   plot_char(_ctx, &q->c, q->x, q->y);

     

       325
       325
       +
               }

     

       326
       326
       +
               ctx->grid[offset] = q->c;

     

       327
       327
       +
               ctx->map[offset] = NULL;

     

       328
       328
       +
           }

     

       329
       329
       +
       

     

       330
       330
       +
           if ((ctx->old_cursor_x != ctx->cursor_x || ctx->old_cursor_y != ctx->cursor_y) || ctx->cursor_status == false) {

     

       331
       331
       +
               plot_char(_ctx, &ctx->grid[ctx->old_cursor_x + ctx->old_cursor_y * _ctx->cols], ctx->old_cursor_x, ctx->old_cursor_y);

     

       332
       332
       +
           }

     

       333
       333
       +
       

     

       334
       334
       +
           ctx->old_cursor_x = ctx->cursor_x;

     

       335
       335
       +
           ctx->old_cursor_y = ctx->cursor_y;

     

       336
       336
       +
       

     

       337
       337
       +
           ctx->queue_i = 0;

     

       338
       338
       +
       }

     

       339
       339
       +
       

     

       340
       340
       +
       static void fbterm_raw_putchar(struct term_context *_ctx, uint8_t c) {

     

       341
       341
       +
           struct fbterm_context *ctx = (void *)_ctx;

     

       342
       342
       +
       

     

       343
       343
       +
           struct fbterm_char ch;

     

       344
       344
       +
           ch.c  = c;

     

       345
       345
       +
           ch.fg = ctx->text_fg;

     

       346
       346
       +
           ch.bg = ctx->text_bg;

     

       347
       347
       +
           push_to_queue(_ctx, &ch, ctx->cursor_x++, ctx->cursor_y);

     

       348
       348
       +
           if (ctx->cursor_x == _ctx->cols && (ctx->cursor_y < _ctx->scroll_bottom_margin - 1 || _ctx->scroll_enabled)) {

     

       349
       349
       +
               ctx->cursor_x = 0;

     

       350
       350
       +
               ctx->cursor_y++;

     

       351
       351
       +
           }

     

       352
       352
       +
           if (ctx->cursor_y == _ctx->scroll_bottom_margin) {

     

       353
       353
       +
               ctx->cursor_y--;

     

       354
       354
       +
               fbterm_scroll(_ctx);

     

       355
       355
       +
           }

     

       356
       356
       +
       }

     

       357
       357
       +
       

     

       358
       358
       +
       static void fbterm_full_refresh(struct term_context *_ctx) {

     

       359
       359
       +
           struct fbterm_context *ctx = (void *)_ctx;

     

       360
       360
       +
       

     

       361
       361
       +
           for (size_t y = 0; y < ctx->height; y++) {

     

       362
       362
       +
               for (size_t x = 0; x < ctx->width; x++) {

     

       363
       363
       +
                   ctx->framebuffer[y * (ctx->pitch / sizeof(uint32_t)) + x] = ctx->canvas[y * ctx->width + x];

     

       364
       364
       +
               }

     

       365
       365
       +
           }

     

       366
       366
       +
       

     

       367
       367
       +
           for (size_t i = 0; i < (size_t)_ctx->rows * _ctx->cols; i++) {

     

       368
       368
       +
               size_t x = i % _ctx->cols;

     

       369
       369
       +
               size_t y = i / _ctx->cols;

     

       370
       370
       +
       

     

       371
       371
       +
               plot_char(_ctx, &ctx->grid[i], x, y);

     

       372
       372
       +
           }

     

       373
       373
       +
       

     

       374
       374
       +
           if (ctx->cursor_status) {

     

       375
       375
       +
               draw_cursor(_ctx);

     

       376
       376
       +
           }

     

       377
       377
       +
       }

     

       378
       378
       +
       

     

       379
       379
       +
       static void fbterm_deinit(struct term_context *_ctx, void (*_free)(void *, size_t)) {

     

       380
       380
       +
           struct fbterm_context *ctx = (void *)_ctx;

     

       381
       381
       +
       

     

       382
       382
       +
           _free(ctx->font_bits, ctx->font_bits_size);

     

       383
       383
       +
           _free(ctx->font_bool, ctx->font_bool_size);

     

       384
       384
       +
           _free(ctx->grid, ctx->grid_size);

     

       385
       385
       +
           _free(ctx->queue, ctx->queue_size);

     

       386
       386
       +
           _free(ctx->map, ctx->map_size);

     

       387
       387
       +
           _free(ctx->canvas, ctx->canvas_size);

     

       388
       388
       +
       }

     

       389
       389
       +
       

     

       390
       390
       +
       struct term_context *fbterm_init(

     

       391
       391
       +
           void *(*_malloc)(size_t),

     

       392
       392
       +
           uint32_t *framebuffer, size_t width, size_t height, size_t pitch,

     

       393
       393
       +
           uint32_t *canvas,

     

       394
       394
       +
           uint32_t *ansi_colours, uint32_t *ansi_bright_colours,

     

       395
       395
       +
           uint32_t *default_bg, uint32_t *default_fg,

     

       396
       396
       +
           void *font, size_t font_width, size_t font_height, size_t font_spacing,

     

       397
       397
       +
           size_t font_scale_x, size_t font_scale_y,

     

       398
       398
       +
           size_t margin

     

       399
       399
       +
       ) {

     

       400
       400
       +
           struct fbterm_context *ctx = _malloc(sizeof(struct fbterm_context));

     

       401
       401
       +
       

     

       402
       402
       +
           struct term_context *_ctx = (void *)ctx;

     

       403
       403
       +
       

     

       404
       404
       +
           memset(ctx, 0, sizeof(struct fbterm_context));

     

       405
       405
       +
       

     

       406
       406
       +
           ctx->cursor_status = true;

     

       407
       407
       +
       

     

       408
       408
       +
           if (ansi_colours != NULL) {

     

       409
       409
       +
               memcpy(ctx->ansi_colours, ansi_colours, sizeof(ctx->ansi_colours));

     

       410
       410
       +
           } else {

     

       411
       411
       +
               ctx->ansi_colours[0] = 0x00000000; // black

     

       412
       412
       +
               ctx->ansi_colours[1] = 0x00aa0000; // red

     

       413
       413
       +
               ctx->ansi_colours[2] = 0x0000aa00; // green

     

       414
       414
       +
               ctx->ansi_colours[3] = 0x00aa5500; // brown

     

       415
       415
       +
               ctx->ansi_colours[4] = 0x000000aa; // blue

     

       416
       416
       +
               ctx->ansi_colours[5] = 0x00aa00aa; // magenta

     

       417
       417
       +
               ctx->ansi_colours[6] = 0x0000aaaa; // cyan

     

       418
       418
       +
               ctx->ansi_colours[7] = 0x00aaaaaa; // grey

     

       419
       419
       +
           }

     

       420
       420
       +
       

     

       421
       421
       +
           if (ansi_bright_colours != NULL) {

     

       422
       422
       +
               memcpy(ctx->ansi_bright_colours, ansi_bright_colours, sizeof(ctx->ansi_bright_colours));

     

       423
       423
       +
           } else {

     

       424
       424
       +
               ctx->ansi_bright_colours[0] = 0x00555555; // black

     

       425
       425
       +
               ctx->ansi_bright_colours[1] = 0x00ff5555; // red

     

       426
       426
       +
               ctx->ansi_bright_colours[2] = 0x0055ff55; // green

     

       427
       427
       +
               ctx->ansi_bright_colours[3] = 0x00ffff55; // brown

     

       428
       428
       +
               ctx->ansi_bright_colours[4] = 0x005555ff; // blue

     

       429
       429
       +
               ctx->ansi_bright_colours[5] = 0x00ff55ff; // magenta

     

       430
       430
       +
               ctx->ansi_bright_colours[6] = 0x0055ffff; // cyan

     

       431
       431
       +
               ctx->ansi_bright_colours[7] = 0x00ffffff; // grey

     

       432
       432
       +
           }

     

       433
       433
       +
       

     

       434
       434
       +
           if (default_bg != NULL) {

     

       435
       435
       +
               ctx->default_bg = *default_bg;

     

       436
       436
       +
           } else {

     

       437
       437
       +
               ctx->default_bg = 0x00000000; // background (black)

     

       438
       438
       +
           }

     

       439
       439
       +
       

     

       440
       440
       +
           if (default_fg != NULL) {

     

       441
       441
       +
               ctx->default_fg = *default_fg;

     

       442
       442
       +
           } else {

     

       443
       443
       +
               ctx->default_fg = 0x00aaaaaa; // foreground (grey)

     

       444
       444
       +
           }

     

       445
       445
       +
       

     

       446
       446
       +
           ctx->text_fg = ctx->default_fg;

     

       447
       447
       +
           ctx->text_bg = 0xffffffff;

     

       448
       448
       +
       

     

       449
       449
       +
           ctx->framebuffer = (void *)framebuffer;

     

       450
       450
       +
           ctx->width = width;

     

       451
       451
       +
           ctx->height = height;

     

       452
       452
       +
           ctx->pitch = pitch;

     

       453
       453
       +
       

     

       454
       454
       +
       #define FONT_BYTES ((font_width * font_height * FBTERM_FONT_GLYPHS) / 8)

     

       455
       455
       +
       

     

       456
       456
       +
           if (font != NULL) {

     

       457
       457
       +
               ctx->font_width = font_width;

     

       458
       458
       +
               ctx->font_height = font_height;

     

       459
       459
       +
               ctx->font_bits = _malloc(FONT_BYTES);

     

       460
       460
       +
               memcpy(ctx->font_bits, font, FONT_BYTES);

     

       461
       461
       +
           } else {

     

       462
       462
       +
               ctx->font_width = font_width = 8;

     

       463
       463
       +
               ctx->font_height = font_height = 16;

     

       464
       464
       +
               font_spacing = 1;

     

       465
       465
       +
               ctx->font_bits = _malloc(FONT_BYTES);

     

       466
       466
       +
               // XXX memcpy(ctx->font_bits, builtin_font, FONT_BYTES);

     

       467
       467
       +
           }

     

       468
       468
       +
       

     

       469
       469
       +
           ctx->font_bits_size = FONT_BYTES;

     

       470
       470
       +
       

     

       471
       471
       +
       #undef FONT_BYTES

     

       472
       472
       +
       

     

       473
       473
       +
           ctx->font_width += font_spacing;

     

       474
       474
       +
       

     

       475
       475
       +
           ctx->font_bool_size = FBTERM_FONT_GLYPHS * font_height * ctx->font_width * sizeof(bool);

     

       476
       476
       +
           ctx->font_bool = _malloc(ctx->font_bool_size);

     

       477
       477
       +
       

     

       478
       478
       +
           for (size_t i = 0; i < FBTERM_FONT_GLYPHS; i++) {

     

       479
       479
       +
               uint8_t *glyph = &ctx->font_bits[i * font_height];

     

       480
       480
       +
       

     

       481
       481
       +
               for (size_t y = 0; y < font_height; y++) {

     

       482
       482
       +
                   // NOTE: the characters in VGA fonts are always one byte wide.

     

       483
       483
       +
                   // 9 dot wide fonts have 8 dots and one empty column, except

     

       484
       484
       +
                   // characters 0xC0-0xDF replicate column 9.

     

       485
       485
       +
                   for (size_t x = 0; x < 8; x++) {

     

       486
       486
       +
                       size_t offset = i * font_height * ctx->font_width + y * ctx->font_width + x;

     

       487
       487
       +
       

     

       488
       488
       +
                       if ((glyph[y] & (0x80 >> x))) {

     

       489
       489
       +
                           ctx->font_bool[offset] = true;

     

       490
       490
       +
                       } else {

     

       491
       491
       +
                           ctx->font_bool[offset] = false;

     

       492
       492
       +
                       }

     

       493
       493
       +
                   }

     

       494
       494
       +
                   // fill columns above 8 like VGA Line Graphics Mode does

     

       495
       495
       +
                   for (size_t x = 8; x < ctx->font_width; x++) {

     

       496
       496
       +
                       size_t offset = i * font_height * ctx->font_width + y * ctx->font_width + x;

     

       497
       497
       +
       

     

       498
       498
       +
                       if (i >= 0xc0 && i <= 0xdf) {

     

       499
       499
       +
                           ctx->font_bool[offset] = (glyph[y] & 1);

     

       500
       500
       +
                       } else {

     

       501
       501
       +
                           ctx->font_bool[offset] = false;

     

       502
       502
       +
                       }

     

       503
       503
       +
                   }

     

       504
       504
       +
               }

     

       505
       505
       +
           }

     

       506
       506
       +
       

     

       507
       507
       +
           ctx->font_scale_x = font_scale_x;

     

       508
       508
       +
           ctx->font_scale_y = font_scale_y;

     

       509
       509
       +
       

     

       510
       510
       +
           ctx->glyph_width = ctx->font_width * font_scale_x;

     

       511
       511
       +
           ctx->glyph_height = font_height * font_scale_y;

     

       512
       512
       +
       

     

       513
       513
       +
           _ctx->cols = (ctx->width - margin * 2) / ctx->glyph_width;

     

       514
       514
       +
           _ctx->rows = (ctx->height - margin * 2) / ctx->glyph_height;

     

       515
       515
       +
       

     

       516
       516
       +
           ctx->offset_x = margin + ((ctx->width - margin * 2) % ctx->glyph_width) / 2;

     

       517
       517
       +
           ctx->offset_y = margin + ((ctx->height - margin * 2) % ctx->glyph_height) / 2;

     

       518
       518
       +
       

     

       519
       519
       +
           ctx->grid_size = _ctx->rows * _ctx->cols * sizeof(struct fbterm_char);

     

       520
       520
       +
           ctx->grid = _malloc(ctx->grid_size);

     

       521
       521
       +
       

     

       522
       522
       +
           ctx->queue_size = _ctx->rows * _ctx->cols * sizeof(struct fbterm_queue_item);

     

       523
       523
       +
           ctx->queue = _malloc(ctx->queue_size);

     

       524
       524
       +
           ctx->queue_i = 0;

     

       525
       525
       +
       

     

       526
       526
       +
           ctx->map_size = _ctx->rows * _ctx->cols * sizeof(struct fbterm_queue_item *);

     

       527
       527
       +
           ctx->map = _malloc(ctx->map_size);

     

       528
       528
       +
       

     

       529
       529
       +
           ctx->canvas_size = ctx->width * ctx->height * sizeof(uint32_t);

     

       530
       530
       +
           ctx->canvas = _malloc(ctx->canvas_size);

     

       531
       531
       +
           if (canvas != NULL) {

     

       532
       532
       +
               memcpy(ctx->canvas, canvas, ctx->canvas_size);

     

       533
       533
       +
           } else {

     

       534
       534
       +
               for (size_t i = 0; i < ctx->width * ctx->height; i++) {

     

       535
       535
       +
                   ctx->canvas[i] = ctx->default_bg;

     

       536
       536
       +
               }

     

       537
       537
       +
           }

     

       538
       538
       +
       

     

       539
       539
       +
           _ctx->raw_putchar = fbterm_raw_putchar;

     

       540
       540
       +
           _ctx->clear = fbterm_clear;

     

       541
       541
       +
           _ctx->enable_cursor = fbterm_enable_cursor;

     

       542
       542
       +
           _ctx->disable_cursor = fbterm_disable_cursor;

     

       543
       543
       +
           _ctx->set_cursor_pos = fbterm_set_cursor_pos;

     

       544
       544
       +
           _ctx->get_cursor_pos = fbterm_get_cursor_pos;

     

       545
       545
       +
           _ctx->set_text_fg = fbterm_set_text_fg;

     

       546
       546
       +
           _ctx->set_text_bg = fbterm_set_text_bg;

     

       547
       547
       +
           _ctx->set_text_fg_bright = fbterm_set_text_fg_bright;

     

       548
       548
       +
           _ctx->set_text_bg_bright = fbterm_set_text_bg_bright;

     

       549
       549
       +
           _ctx->set_text_fg_rgb = fbterm_set_text_fg_rgb;

     

       550
       550
       +
           _ctx->set_text_bg_rgb = fbterm_set_text_bg_rgb;

     

       551
       551
       +
           _ctx->set_text_fg_default = fbterm_set_text_fg_default;

     

       552
       552
       +
           _ctx->set_text_bg_default = fbterm_set_text_bg_default;

     

       553
       553
       +
           _ctx->move_character = fbterm_move_character;

     

       554
       554
       +
           _ctx->scroll = fbterm_scroll;

     

       555
       555
       +
           _ctx->revscroll = fbterm_revscroll;

     

       556
       556
       +
           _ctx->swap_palette = fbterm_swap_palette;

     

       557
       557
       +
           _ctx->double_buffer_flush = fbterm_double_buffer_flush;

     

       558
       558
       +
           _ctx->full_refresh = fbterm_full_refresh;

     

       559
       559
       +
           _ctx->deinit = fbterm_deinit;

     

       560
       560
       +
       

     

       561
       561
       +
           term_context_reinit(_ctx);

     

       562
       562
       +
       

     

       563
       563
       +
           fbterm_clear(_ctx, true);

     

       564
       564
       +
           fbterm_full_refresh(_ctx);

     

       565
       565
       +
       

     

       566
       566
       +
           return _ctx;

     

       567
       567
       +
       }

+91

backends/framebuffer.h

···

       1
       1
       +
       #ifndef _TERM_FRAMEBUFFER_H

     

       2
       2
       +
       #define _TERM_FRAMEBUFFER_H

     

       3
       3
       +
       

     

       4
       4
       +
       #include <stdint.h>

     

       5
       5
       +
       #include <stddef.h>

     

       6
       6
       +
       #include <stdbool.h>

     

       7
       7
       +
       

     

       8
       8
       +
       #include "../term.h"

     

       9
       9
       +
       

     

       10
       10
       +
       #define FBTERM_FONT_GLYPHS 256

     

       11
       11
       +
       

     

       12
       12
       +
       struct fbterm_char {

     

       13
       13
       +
           uint32_t c;

     

       14
       14
       +
           uint32_t fg;

     

       15
       15
       +
           uint32_t bg;

     

       16
       16
       +
       };

     

       17
       17
       +
       

     

       18
       18
       +
       struct fbterm_queue_item {

     

       19
       19
       +
           size_t x, y;

     

       20
       20
       +
           struct fbterm_char c;

     

       21
       21
       +
       };

     

       22
       22
       +
       

     

       23
       23
       +
       struct fbterm_context {

     

       24
       24
       +
           struct term_context term;

     

       25
       25
       +
       

     

       26
       26
       +
           size_t font_width;

     

       27
       27
       +
           size_t font_height;

     

       28
       28
       +
           size_t glyph_width;

     

       29
       29
       +
           size_t glyph_height;

     

       30
       30
       +
       

     

       31
       31
       +
           size_t font_scale_x;

     

       32
       32
       +
           size_t font_scale_y;

     

       33
       33
       +
       

     

       34
       34
       +
           size_t offset_x, offset_y;

     

       35
       35
       +
       

     

       36
       36
       +
           volatile uint32_t *framebuffer;

     

       37
       37
       +
           size_t pitch;

     

       38
       38
       +
           size_t width;

     

       39
       39
       +
           size_t height;

     

       40
       40
       +
           size_t bpp;

     

       41
       41
       +
       

     

       42
       42
       +
           size_t font_bits_size;

     

       43
       43
       +
           uint8_t *font_bits;

     

       44
       44
       +
           size_t font_bool_size;

     

       45
       45
       +
           bool *font_bool;

     

       46
       46
       +
       

     

       47
       47
       +
           uint32_t ansi_colours[8];

     

       48
       48
       +
           uint32_t ansi_bright_colours[8];

     

       49
       49
       +
           uint32_t default_fg, default_bg;

     

       50
       50
       +
       

     

       51
       51
       +
           size_t canvas_size;

     

       52
       52
       +
           uint32_t *canvas;

     

       53
       53
       +
       

     

       54
       54
       +
           size_t grid_size;

     

       55
       55
       +
           size_t queue_size;

     

       56
       56
       +
           size_t map_size;

     

       57
       57
       +
       

     

       58
       58
       +
           struct fbterm_char *grid;

     

       59
       59
       +
       

     

       60
       60
       +
           struct fbterm_queue_item *queue;

     

       61
       61
       +
           size_t queue_i;

     

       62
       62
       +
       

     

       63
       63
       +
           struct fbterm_queue_item **map;

     

       64
       64
       +
       

     

       65
       65
       +
           uint32_t text_fg;

     

       66
       66
       +
           uint32_t text_bg;

     

       67
       67
       +
           bool cursor_status;

     

       68
       68
       +
           size_t cursor_x;

     

       69
       69
       +
           size_t cursor_y;

     

       70
       70
       +
       

     

       71
       71
       +
           uint32_t saved_state_text_fg;

     

       72
       72
       +
           uint32_t saved_state_text_bg;

     

       73
       73
       +
           size_t saved_state_cursor_x;

     

       74
       74
       +
           size_t saved_state_cursor_y;

     

       75
       75
       +
       

     

       76
       76
       +
           size_t old_cursor_x;

     

       77
       77
       +
           size_t old_cursor_y;

     

       78
       78
       +
       };

     

       79
       79
       +
       

     

       80
       80
       +
       struct term_context *fbterm_init(

     

       81
       81
       +
           void *(*_malloc)(size_t),

     

       82
       82
       +
           uint32_t *framebuffer, size_t width, size_t height, size_t pitch,

     

       83
       83
       +
           uint32_t *canvas,

     

       84
       84
       +
           uint32_t *ansi_colours, uint32_t *ansi_bright_colours,

     

       85
       85
       +
           uint32_t *default_bg, uint32_t *default_fg,

     

       86
       86
       +
           void *font, size_t font_width, size_t font_height, size_t font_spacing,

     

       87
       87
       +
           size_t font_scale_x, size_t font_scale_y,

     

       88
       88
       +
           size_t margin

     

       89
       89
       +
       );

     

       90
       90
       +
       

     

       91
       91
       +
       #endif

+864

term.c

···

       1
       1
       +
       #include <stdint.h>

     

       2
       2
       +
       #include <stddef.h>

     

       3
       3
       +
       #include <stdbool.h>

     

       4
       4
       +
       

     

       5
       5
       +
       #include "term.h"

     

       6
       6
       +
       

     

       7
       7
       +
       static const uint32_t col256[] = {

     

       8
       8
       +
           0x000000, 0x00005f, 0x000087, 0x0000af, 0x0000d7, 0x0000ff, 0x005f00, 0x005f5f,

     

       9
       9
       +
           0x005f87, 0x005faf, 0x005fd7, 0x005fff, 0x008700, 0x00875f, 0x008787, 0x0087af,

     

       10
       10
       +
           0x0087d7, 0x0087ff, 0x00af00, 0x00af5f, 0x00af87, 0x00afaf, 0x00afd7, 0x00afff,

     

       11
       11
       +
           0x00d700, 0x00d75f, 0x00d787, 0x00d7af, 0x00d7d7, 0x00d7ff, 0x00ff00, 0x00ff5f,

     

       12
       12
       +
           0x00ff87, 0x00ffaf, 0x00ffd7, 0x00ffff, 0x5f0000, 0x5f005f, 0x5f0087, 0x5f00af,

     

       13
       13
       +
           0x5f00d7, 0x5f00ff, 0x5f5f00, 0x5f5f5f, 0x5f5f87, 0x5f5faf, 0x5f5fd7, 0x5f5fff,

     

       14
       14
       +
           0x5f8700, 0x5f875f, 0x5f8787, 0x5f87af, 0x5f87d7, 0x5f87ff, 0x5faf00, 0x5faf5f,

     

       15
       15
       +
           0x5faf87, 0x5fafaf, 0x5fafd7, 0x5fafff, 0x5fd700, 0x5fd75f, 0x5fd787, 0x5fd7af,

     

       16
       16
       +
           0x5fd7d7, 0x5fd7ff, 0x5fff00, 0x5fff5f, 0x5fff87, 0x5fffaf, 0x5fffd7, 0x5fffff,

     

       17
       17
       +
           0x870000, 0x87005f, 0x870087, 0x8700af, 0x8700d7, 0x8700ff, 0x875f00, 0x875f5f,

     

       18
       18
       +
           0x875f87, 0x875faf, 0x875fd7, 0x875fff, 0x878700, 0x87875f, 0x878787, 0x8787af,

     

       19
       19
       +
           0x8787d7, 0x8787ff, 0x87af00, 0x87af5f, 0x87af87, 0x87afaf, 0x87afd7, 0x87afff,

     

       20
       20
       +
           0x87d700, 0x87d75f, 0x87d787, 0x87d7af, 0x87d7d7, 0x87d7ff, 0x87ff00, 0x87ff5f,

     

       21
       21
       +
           0x87ff87, 0x87ffaf, 0x87ffd7, 0x87ffff, 0xaf0000, 0xaf005f, 0xaf0087, 0xaf00af,

     

       22
       22
       +
           0xaf00d7, 0xaf00ff, 0xaf5f00, 0xaf5f5f, 0xaf5f87, 0xaf5faf, 0xaf5fd7, 0xaf5fff,

     

       23
       23
       +
           0xaf8700, 0xaf875f, 0xaf8787, 0xaf87af, 0xaf87d7, 0xaf87ff, 0xafaf00, 0xafaf5f,

     

       24
       24
       +
           0xafaf87, 0xafafaf, 0xafafd7, 0xafafff, 0xafd700, 0xafd75f, 0xafd787, 0xafd7af,

     

       25
       25
       +
           0xafd7d7, 0xafd7ff, 0xafff00, 0xafff5f, 0xafff87, 0xafffaf, 0xafffd7, 0xafffff,

     

       26
       26
       +
           0xd70000, 0xd7005f, 0xd70087, 0xd700af, 0xd700d7, 0xd700ff, 0xd75f00, 0xd75f5f,

     

       27
       27
       +
           0xd75f87, 0xd75faf, 0xd75fd7, 0xd75fff, 0xd78700, 0xd7875f, 0xd78787, 0xd787af,

     

       28
       28
       +
           0xd787d7, 0xd787ff, 0xd7af00, 0xd7af5f, 0xd7af87, 0xd7afaf, 0xd7afd7, 0xd7afff,

     

       29
       29
       +
           0xd7d700, 0xd7d75f, 0xd7d787, 0xd7d7af, 0xd7d7d7, 0xd7d7ff, 0xd7ff00, 0xd7ff5f,

     

       30
       30
       +
           0xd7ff87, 0xd7ffaf, 0xd7ffd7, 0xd7ffff, 0xff0000, 0xff005f, 0xff0087, 0xff00af,

     

       31
       31
       +
           0xff00d7, 0xff00ff, 0xff5f00, 0xff5f5f, 0xff5f87, 0xff5faf, 0xff5fd7, 0xff5fff,

     

       32
       32
       +
           0xff8700, 0xff875f, 0xff8787, 0xff87af, 0xff87d7, 0xff87ff, 0xffaf00, 0xffaf5f,

     

       33
       33
       +
           0xffaf87, 0xffafaf, 0xffafd7, 0xffafff, 0xffd700, 0xffd75f, 0xffd787, 0xffd7af,

     

       34
       34
       +
           0xffd7d7, 0xffd7ff, 0xffff00, 0xffff5f, 0xffff87, 0xffffaf, 0xffffd7, 0xffffff,

     

       35
       35
       +
           0x080808, 0x121212, 0x1c1c1c, 0x262626, 0x303030, 0x3a3a3a, 0x444444, 0x4e4e4e,

     

       36
       36
       +
           0x585858, 0x626262, 0x6c6c6c, 0x767676, 0x808080, 0x8a8a8a, 0x949494, 0x9e9e9e,

     

       37
       37
       +
           0xa8a8a8, 0xb2b2b2, 0xbcbcbc, 0xc6c6c6, 0xd0d0d0, 0xdadada, 0xe4e4e4, 0xeeeeee

     

       38
       38
       +
       };

     

       39
       39
       +
       

     

       40
       40
       +
       // Tries to implement this standard for terminfo

     

       41
       41
       +
       // https://man7.org/linux/man-pages/man4/console_codes.4.html

     

       42
       42
       +
       

     

       43
       43
       +
       #define CHARSET_DEFAULT 0

     

       44
       44
       +
       #define CHARSET_DEC_SPECIAL 1

     

       45
       45
       +
       

     

       46
       46
       +
       void term_context_reinit(struct term_context *ctx) {

     

       47
       47
       +
           ctx->scroll_enabled = true;

     

       48
       48
       +
           ctx->tab_size = 8;

     

       49
       49
       +
           ctx->escape_offset = 0;

     

       50
       50
       +
           ctx->control_sequence = false;

     

       51
       51
       +
           ctx->csi = false;

     

       52
       52
       +
           ctx->escape = false;

     

       53
       53
       +
           ctx->rrr = false;

     

       54
       54
       +
           ctx->discard_next = false;

     

       55
       55
       +
           ctx->bold = false;

     

       56
       56
       +
           ctx->reverse_video = false;

     

       57
       57
       +
           ctx->dec_private = false;

     

       58
       58
       +
           ctx->esc_values_i = 0;

     

       59
       59
       +
           ctx->saved_cursor_x = 0;

     

       60
       60
       +
           ctx->saved_cursor_y = 0;

     

       61
       61
       +
           ctx->current_primary = (size_t)-1;

     

       62
       62
       +
           ctx->insert_mode = false;

     

       63
       63
       +
           ctx->scroll_top_margin = 0;

     

       64
       64
       +
           ctx->scroll_bottom_margin = ctx->rows;

     

       65
       65
       +
           ctx->current_charset = 0;

     

       66
       66
       +
           ctx->g_select = 0;

     

       67
       67
       +
           ctx->charsets[0] = CHARSET_DEFAULT;

     

       68
       68
       +
           ctx->charsets[1] = CHARSET_DEC_SPECIAL;

     

       69
       69
       +
           ctx->autoflush = true;

     

       70
       70
       +
       }

     

       71
       71
       +
       

     

       72
       72
       +
       static void term_putchar(struct term_context *ctx, uint8_t c);

     

       73
       73
       +
       

     

       74
       74
       +
       void term_write(struct term_context *ctx, const char *buf, size_t count) {

     

       75
       75
       +
           for (size_t i = 0; i < count; i++) {

     

       76
       76
       +
               term_putchar(ctx, buf[i]);

     

       77
       77
       +
           }

     

       78
       78
       +
       

     

       79
       79
       +
           if (ctx->autoflush) {

     

       80
       80
       +
               ctx->double_buffer_flush(ctx);

     

       81
       81
       +
           }

     

       82
       82
       +
       }

     

       83
       83
       +
       

     

       84
       84
       +
       static void sgr(struct term_context *ctx) {

     

       85
       85
       +
           size_t i = 0;

     

       86
       86
       +
       

     

       87
       87
       +
           if (!ctx->esc_values_i)

     

       88
       88
       +
               goto def;

     

       89
       89
       +
       

     

       90
       90
       +
           for (; i < ctx->esc_values_i; i++) {

     

       91
       91
       +
               size_t offset;

     

       92
       92
       +
       

     

       93
       93
       +
               if (ctx->esc_values[i] == 0) {

     

       94
       94
       +
       def:

     

       95
       95
       +
                   if (ctx->reverse_video) {

     

       96
       96
       +
                       ctx->reverse_video = false;

     

       97
       97
       +
                       ctx->swap_palette(ctx);

     

       98
       98
       +
                   }

     

       99
       99
       +
                   ctx->bold = false;

     

       100
       100
       +
                   ctx->current_primary = (size_t)-1;

     

       101
       101
       +
                   ctx->set_text_bg_default(ctx);

     

       102
       102
       +
                   ctx->set_text_fg_default(ctx);

     

       103
       103
       +
                   continue;

     

       104
       104
       +
               }

     

       105
       105
       +
       

     

       106
       106
       +
               else if (ctx->esc_values[i] == 1) {

     

       107
       107
       +
                   ctx->bold = true;

     

       108
       108
       +
                   if (ctx->current_primary != (size_t)-1) {

     

       109
       109
       +
                       if (!ctx->reverse_video) {

     

       110
       110
       +
                           ctx->set_text_fg_bright(ctx, ctx->current_primary);

     

       111
       111
       +
                       } else {

     

       112
       112
       +
                           ctx->set_text_bg_bright(ctx, ctx->current_primary);

     

       113
       113
       +
                       }

     

       114
       114
       +
                   }

     

       115
       115
       +
                   continue;

     

       116
       116
       +
               }

     

       117
       117
       +
       

     

       118
       118
       +
               else if (ctx->esc_values[i] == 22) {

     

       119
       119
       +
                   ctx->bold = false;

     

       120
       120
       +
                   if (ctx->current_primary != (size_t)-1) {

     

       121
       121
       +
                       if (!ctx->reverse_video) {

     

       122
       122
       +
                           ctx->set_text_fg(ctx, ctx->current_primary);

     

       123
       123
       +
                       } else {

     

       124
       124
       +
                           ctx->set_text_bg(ctx, ctx->current_primary);

     

       125
       125
       +
                       }

     

       126
       126
       +
                   }

     

       127
       127
       +
                   continue;

     

       128
       128
       +
               }

     

       129
       129
       +
       

     

       130
       130
       +
               else if (ctx->esc_values[i] >= 30 && ctx->esc_values[i] <= 37) {

     

       131
       131
       +
                   offset = 30;

     

       132
       132
       +
                   ctx->current_primary = ctx->esc_values[i] - offset;

     

       133
       133
       +
       

     

       134
       134
       +
                   if (ctx->reverse_video) {

     

       135
       135
       +
                       goto set_bg;

     

       136
       136
       +
                   }

     

       137
       137
       +
       

     

       138
       138
       +
       set_fg:

     

       139
       139
       +
                   if (ctx->bold && !ctx->reverse_video) {

     

       140
       140
       +
                       ctx->set_text_fg_bright(ctx, ctx->esc_values[i] - offset);

     

       141
       141
       +
                   } else {

     

       142
       142
       +
                       ctx->set_text_fg(ctx, ctx->esc_values[i] - offset);

     

       143
       143
       +
                   }

     

       144
       144
       +
                   continue;

     

       145
       145
       +
               }

     

       146
       146
       +
       

     

       147
       147
       +
               else if (ctx->esc_values[i] >= 40 && ctx->esc_values[i] <= 47) {

     

       148
       148
       +
                   offset = 40;

     

       149
       149
       +
                   if (ctx->reverse_video) {

     

       150
       150
       +
                       goto set_fg;

     

       151
       151
       +
                   }

     

       152
       152
       +
       

     

       153
       153
       +
       set_bg:

     

       154
       154
       +
                   if (ctx->bold && ctx->reverse_video) {

     

       155
       155
       +
                       ctx->set_text_bg_bright(ctx, ctx->esc_values[i] - offset);

     

       156
       156
       +
                   } else {

     

       157
       157
       +
                       ctx->set_text_bg(ctx, ctx->esc_values[i] - offset);

     

       158
       158
       +
                   }

     

       159
       159
       +
                   continue;

     

       160
       160
       +
               }

     

       161
       161
       +
       

     

       162
       162
       +
               else if (ctx->esc_values[i] >= 90 && ctx->esc_values[i] <= 97) {

     

       163
       163
       +
                   offset = 90;

     

       164
       164
       +
                   ctx->current_primary = ctx->esc_values[i] - offset;

     

       165
       165
       +
       

     

       166
       166
       +
                   if (ctx->reverse_video) {

     

       167
       167
       +
                       goto set_bg_bright;

     

       168
       168
       +
                   }

     

       169
       169
       +
       

     

       170
       170
       +
       set_fg_bright:

     

       171
       171
       +
                   ctx->set_text_fg_bright(ctx, ctx->esc_values[i] - offset);

     

       172
       172
       +
                   continue;

     

       173
       173
       +
               }

     

       174
       174
       +
       

     

       175
       175
       +
               else if (ctx->esc_values[i] >= 100 && ctx->esc_values[i] <= 107) {

     

       176
       176
       +
                   offset = 100;

     

       177
       177
       +
                   if (ctx->reverse_video) {

     

       178
       178
       +
                       goto set_fg_bright;

     

       179
       179
       +
                   }

     

       180
       180
       +
       

     

       181
       181
       +
       set_bg_bright:

     

       182
       182
       +
                   ctx->set_text_bg_bright(ctx, ctx->esc_values[i] - offset);

     

       183
       183
       +
                   continue;

     

       184
       184
       +
               }

     

       185
       185
       +
       

     

       186
       186
       +
               else if (ctx->esc_values[i] == 39) {

     

       187
       187
       +
                   ctx->current_primary = (size_t)-1;

     

       188
       188
       +
       

     

       189
       189
       +
                   if (ctx->reverse_video) {

     

       190
       190
       +
                       ctx->swap_palette(ctx);

     

       191
       191
       +
                   }

     

       192
       192
       +
       

     

       193
       193
       +
                   ctx->set_text_fg_default(ctx);

     

       194
       194
       +
       

     

       195
       195
       +
                   if (ctx->reverse_video) {

     

       196
       196
       +
                       ctx->swap_palette(ctx);

     

       197
       197
       +
                   }

     

       198
       198
       +
       

     

       199
       199
       +
                   continue;

     

       200
       200
       +
               }

     

       201
       201
       +
       

     

       202
       202
       +
               else if (ctx->esc_values[i] == 49) {

     

       203
       203
       +
                   if (ctx->reverse_video) {

     

       204
       204
       +
                       ctx->swap_palette(ctx);

     

       205
       205
       +
                   }

     

       206
       206
       +
       

     

       207
       207
       +
                   ctx->set_text_bg_default(ctx);

     

       208
       208
       +
       

     

       209
       209
       +
                   if (ctx->reverse_video) {

     

       210
       210
       +
                       ctx->swap_palette(ctx);

     

       211
       211
       +
                   }

     

       212
       212
       +
       

     

       213
       213
       +
                   continue;

     

       214
       214
       +
               }

     

       215
       215
       +
       

     

       216
       216
       +
               else if (ctx->esc_values[i] == 7) {

     

       217
       217
       +
                   if (!ctx->reverse_video) {

     

       218
       218
       +
                       ctx->reverse_video = true;

     

       219
       219
       +
                       ctx->swap_palette(ctx);

     

       220
       220
       +
                   }

     

       221
       221
       +
                   continue;

     

       222
       222
       +
               }

     

       223
       223
       +
       

     

       224
       224
       +
               else if (ctx->esc_values[i] == 27) {

     

       225
       225
       +
                   if (ctx->reverse_video) {

     

       226
       226
       +
                       ctx->reverse_video = false;

     

       227
       227
       +
                       ctx->swap_palette(ctx);

     

       228
       228
       +
                   }

     

       229
       229
       +
                   continue;

     

       230
       230
       +
               }

     

       231
       231
       +
       

     

       232
       232
       +
               // 256/RGB

     

       233
       233
       +
               else if (ctx->esc_values[i] == 38 || ctx->esc_values[i] == 48) {

     

       234
       234
       +
                   bool fg = ctx->esc_values[i] == 38;

     

       235
       235
       +
       

     

       236
       236
       +
                   i++;

     

       237
       237
       +
                   if (i >= ctx->esc_values_i) {

     

       238
       238
       +
                       break;

     

       239
       239
       +
                   }

     

       240
       240
       +
       

     

       241
       241
       +
                   switch (ctx->esc_values[i]) {

     

       242
       242
       +
                       case 2: { // RGB

     

       243
       243
       +
                           if (i + 3 >= ctx->esc_values_i) {

     

       244
       244
       +
                               goto out;

     

       245
       245
       +
                           }

     

       246
       246
       +
       

     

       247
       247
       +
                           uint32_t rgb_value = 0;

     

       248
       248
       +
       

     

       249
       249
       +
                           rgb_value |= ctx->esc_values[i + 1] << 16;

     

       250
       250
       +
                           rgb_value |= ctx->esc_values[i + 2] << 8;

     

       251
       251
       +
                           rgb_value |= ctx->esc_values[i + 3];

     

       252
       252
       +
       

     

       253
       253
       +
                           i += 3;

     

       254
       254
       +
       

     

       255
       255
       +
                           (fg ? ctx->set_text_fg_rgb : ctx->set_text_bg_rgb)(ctx, rgb_value);

     

       256
       256
       +
       

     

       257
       257
       +
                           break;

     

       258
       258
       +
                       }

     

       259
       259
       +
                       case 5: { // 256 colors

     

       260
       260
       +
                           if (i + 1 >= ctx->esc_values_i) {

     

       261
       261
       +
                               goto out;

     

       262
       262
       +
                           }

     

       263
       263
       +
       

     

       264
       264
       +
                           uint32_t col = ctx->esc_values[i + 1];

     

       265
       265
       +
       

     

       266
       266
       +
                           i++;

     

       267
       267
       +
       

     

       268
       268
       +
                           if (col < 8) {

     

       269
       269
       +
                               (fg ? ctx->set_text_fg : ctx->set_text_bg)(ctx, col);

     

       270
       270
       +
                           } else if (col < 16) {

     

       271
       271
       +
                               (fg ? ctx->set_text_fg_bright : ctx->set_text_bg_bright)(ctx, col - 8);

     

       272
       272
       +
                           } else {

     

       273
       273
       +
                               uint32_t rgb_value = col256[col - 16];

     

       274
       274
       +
                               (fg ? ctx->set_text_fg_rgb : ctx->set_text_bg_rgb)(ctx, rgb_value);

     

       275
       275
       +
                           }

     

       276
       276
       +
       

     

       277
       277
       +
                           break;

     

       278
       278
       +
                       }

     

       279
       279
       +
                       default: continue;

     

       280
       280
       +
                   }

     

       281
       281
       +
               }

     

       282
       282
       +
           }

     

       283
       283
       +
       

     

       284
       284
       +
       out:;

     

       285
       285
       +
       }

     

       286
       286
       +
       

     

       287
       287
       +
       static void dec_private_parse(struct term_context *ctx, uint8_t c) {

     

       288
       288
       +
           ctx->dec_private = false;

     

       289
       289
       +
       

     

       290
       290
       +
           if (ctx->esc_values_i == 0) {

     

       291
       291
       +
               return;

     

       292
       292
       +
           }

     

       293
       293
       +
       

     

       294
       294
       +
           bool set;

     

       295
       295
       +
       

     

       296
       296
       +
           switch (c) {

     

       297
       297
       +
               case 'h':

     

       298
       298
       +
                   set = true; break;

     

       299
       299
       +
               case 'l':

     

       300
       300
       +
                   set = false; break;

     

       301
       301
       +
               default:

     

       302
       302
       +
                   return;

     

       303
       303
       +
           }

     

       304
       304
       +
       

     

       305
       305
       +
           switch (ctx->esc_values[0]) {

     

       306
       306
       +
               case 25: {

     

       307
       307
       +
                   if (set) {

     

       308
       308
       +
                       ctx->enable_cursor(ctx);

     

       309
       309
       +
                   } else {

     

       310
       310
       +
                       ctx->disable_cursor(ctx);

     

       311
       311
       +
                   }

     

       312
       312
       +
                   return;

     

       313
       313
       +
               }

     

       314
       314
       +
           }

     

       315
       315
       +
       

     

       316
       316
       +
           if (ctx->callback != NULL) {

     

       317
       317
       +
               ctx->callback(ctx, TERM_CB_DEC, ctx->esc_values_i, (uintptr_t)ctx->esc_values, c);

     

       318
       318
       +
           }

     

       319
       319
       +
       }

     

       320
       320
       +
       

     

       321
       321
       +
       static void linux_private_parse(struct term_context *ctx) {

     

       322
       322
       +
           if (ctx->esc_values_i == 0) {

     

       323
       323
       +
               return;

     

       324
       324
       +
           }

     

       325
       325
       +
       

     

       326
       326
       +
           if (ctx->callback != NULL) {

     

       327
       327
       +
               ctx->callback(ctx, TERM_CB_LINUX, ctx->esc_values_i, (uintptr_t)ctx->esc_values, 0);

     

       328
       328
       +
           }

     

       329
       329
       +
       }

     

       330
       330
       +
       

     

       331
       331
       +
       static void mode_toggle(struct term_context *ctx, uint8_t c) {

     

       332
       332
       +
           if (ctx->esc_values_i == 0) {

     

       333
       333
       +
               return;

     

       334
       334
       +
           }

     

       335
       335
       +
       

     

       336
       336
       +
           bool set;

     

       337
       337
       +
       

     

       338
       338
       +
           switch (c) {

     

       339
       339
       +
               case 'h':

     

       340
       340
       +
                   set = true; break;

     

       341
       341
       +
               case 'l':

     

       342
       342
       +
                   set = false; break;

     

       343
       343
       +
               default:

     

       344
       344
       +
                   return;

     

       345
       345
       +
           }

     

       346
       346
       +
       

     

       347
       347
       +
           switch (ctx->esc_values[0]) {

     

       348
       348
       +
               case 4:

     

       349
       349
       +
                   ctx->insert_mode = set; return;

     

       350
       350
       +
           }

     

       351
       351
       +
       

     

       352
       352
       +
           if (ctx->callback != NULL) {

     

       353
       353
       +
               ctx->callback(ctx, TERM_CB_MODE, ctx->esc_values_i, (uintptr_t)ctx->esc_values, c);

     

       354
       354
       +
           }

     

       355
       355
       +
       }

     

       356
       356
       +
       

     

       357
       357
       +
       static void control_sequence_parse(struct term_context *ctx, uint8_t c) {

     

       358
       358
       +
           if (ctx->escape_offset == 2) {

     

       359
       359
       +
               switch (c) {

     

       360
       360
       +
                   case '[':

     

       361
       361
       +
                       ctx->discard_next = true;

     

       362
       362
       +
                       goto cleanup;

     

       363
       363
       +
                   case '?':

     

       364
       364
       +
                       ctx->dec_private = true;

     

       365
       365
       +
                       return;

     

       366
       366
       +
               }

     

       367
       367
       +
           }

     

       368
       368
       +
       

     

       369
       369
       +
           if (c >= '0' && c <= '9') {

     

       370
       370
       +
               if (ctx->esc_values_i == TERM_MAX_ESC_VALUES) {

     

       371
       371
       +
                   return;

     

       372
       372
       +
               }

     

       373
       373
       +
               ctx->rrr = true;

     

       374
       374
       +
               ctx->esc_values[ctx->esc_values_i] *= 10;

     

       375
       375
       +
               ctx->esc_values[ctx->esc_values_i] += c - '0';

     

       376
       376
       +
               return;

     

       377
       377
       +
           }

     

       378
       378
       +
       

     

       379
       379
       +
           if (ctx->rrr == true) {

     

       380
       380
       +
               ctx->esc_values_i++;

     

       381
       381
       +
               ctx->rrr = false;

     

       382
       382
       +
               if (c == ';')

     

       383
       383
       +
                   return;

     

       384
       384
       +
           } else if (c == ';') {

     

       385
       385
       +
               if (ctx->esc_values_i == TERM_MAX_ESC_VALUES) {

     

       386
       386
       +
                   return;

     

       387
       387
       +
               }

     

       388
       388
       +
               ctx->esc_values[ctx->esc_values_i] = 0;

     

       389
       389
       +
               ctx->esc_values_i++;

     

       390
       390
       +
               return;

     

       391
       391
       +
           }

     

       392
       392
       +
       

     

       393
       393
       +
           size_t esc_default;

     

       394
       394
       +
           switch (c) {

     

       395
       395
       +
               case 'J': case 'K': case 'q':

     

       396
       396
       +
                   esc_default = 0; break;

     

       397
       397
       +
               default:

     

       398
       398
       +
                   esc_default = 1; break;

     

       399
       399
       +
           }

     

       400
       400
       +
       

     

       401
       401
       +
           for (size_t i = ctx->esc_values_i; i < TERM_MAX_ESC_VALUES; i++) {

     

       402
       402
       +
               ctx->esc_values[i] = esc_default;

     

       403
       403
       +
           }

     

       404
       404
       +
       

     

       405
       405
       +
           if (ctx->dec_private == true) {

     

       406
       406
       +
               dec_private_parse(ctx, c);

     

       407
       407
       +
               goto cleanup;

     

       408
       408
       +
           }

     

       409
       409
       +
       

     

       410
       410
       +
           bool r = ctx->scroll_enabled;

     

       411
       411
       +
           ctx->scroll_enabled = false;

     

       412
       412
       +
           size_t x, y;

     

       413
       413
       +
           ctx->get_cursor_pos(ctx, &x, &y);

     

       414
       414
       +
       

     

       415
       415
       +
           switch (c) {

     

       416
       416
       +
               case 'F':

     

       417
       417
       +
                   x = 0;

     

       418
       418
       +
                   // FALLTHRU

     

       419
       419
       +
               case 'A': {

     

       420
       420
       +
                   if (ctx->esc_values[0] > y)

     

       421
       421
       +
                       ctx->esc_values[0] = y;

     

       422
       422
       +
                   size_t orig_y = y;

     

       423
       423
       +
                   size_t dest_y = y - ctx->esc_values[0];

     

       424
       424
       +
                   bool will_be_in_scroll_region = false;

     

       425
       425
       +
                   if ((ctx->scroll_top_margin >= dest_y && ctx->scroll_top_margin <= orig_y)

     

       426
       426
       +
                    || (ctx->scroll_bottom_margin >= dest_y && ctx->scroll_bottom_margin <= orig_y)) {

     

       427
       427
       +
                       will_be_in_scroll_region = true;

     

       428
       428
       +
                   }

     

       429
       429
       +
                   if (will_be_in_scroll_region && dest_y < ctx->scroll_top_margin) {

     

       430
       430
       +
                       dest_y = ctx->scroll_top_margin;

     

       431
       431
       +
                   }

     

       432
       432
       +
                   ctx->set_cursor_pos(ctx, x, dest_y);

     

       433
       433
       +
                   break;

     

       434
       434
       +
               }

     

       435
       435
       +
               case 'E':

     

       436
       436
       +
                   x = 0;

     

       437
       437
       +
                   // FALLTHRU

     

       438
       438
       +
               case 'e':

     

       439
       439
       +
               case 'B': {

     

       440
       440
       +
                   if (y + ctx->esc_values[0] > ctx->rows - 1)

     

       441
       441
       +
                       ctx->esc_values[0] = (ctx->rows - 1) - y;

     

       442
       442
       +
                   size_t orig_y = y;

     

       443
       443
       +
                   size_t dest_y = y + ctx->esc_values[0];

     

       444
       444
       +
                   bool will_be_in_scroll_region = false;

     

       445
       445
       +
                   if ((ctx->scroll_top_margin >= orig_y && ctx->scroll_top_margin <= dest_y)

     

       446
       446
       +
                    || (ctx->scroll_bottom_margin >= orig_y && ctx->scroll_bottom_margin <= dest_y)) {

     

       447
       447
       +
                       will_be_in_scroll_region = true;

     

       448
       448
       +
                   }

     

       449
       449
       +
                   if (will_be_in_scroll_region && dest_y >= ctx->scroll_bottom_margin) {

     

       450
       450
       +
                       dest_y = ctx->scroll_bottom_margin - 1;

     

       451
       451
       +
                   }

     

       452
       452
       +
                   ctx->set_cursor_pos(ctx, x, dest_y);

     

       453
       453
       +
                   break;

     

       454
       454
       +
               }

     

       455
       455
       +
               case 'a':

     

       456
       456
       +
               case 'C':

     

       457
       457
       +
                   if (x + ctx->esc_values[0] > ctx->cols - 1)

     

       458
       458
       +
                       ctx->esc_values[0] = (ctx->cols - 1) - x;

     

       459
       459
       +
                   ctx->set_cursor_pos(ctx, x + ctx->esc_values[0], y);

     

       460
       460
       +
                   break;

     

       461
       461
       +
               case 'D':

     

       462
       462
       +
                   if (ctx->esc_values[0] > x)

     

       463
       463
       +
                       ctx->esc_values[0] = x;

     

       464
       464
       +
                   ctx->set_cursor_pos(ctx, x - ctx->esc_values[0], y);

     

       465
       465
       +
                   break;

     

       466
       466
       +
               case 'c':

     

       467
       467
       +
                   if (ctx->callback != NULL) {

     

       468
       468
       +
                       ctx->callback(ctx, TERM_CB_PRIVATE_ID, 0, 0, 0);

     

       469
       469
       +
                   }

     

       470
       470
       +
                   break;

     

       471
       471
       +
               case 'd':

     

       472
       472
       +
                   ctx->esc_values[0] -= 1;

     

       473
       473
       +
                   if (ctx->esc_values[0] >= ctx->rows)

     

       474
       474
       +
                       ctx->esc_values[0] = ctx->rows - 1;

     

       475
       475
       +
                   ctx->set_cursor_pos(ctx, x, ctx->esc_values[0]);

     

       476
       476
       +
                   break;

     

       477
       477
       +
               case 'G':

     

       478
       478
       +
               case '`':

     

       479
       479
       +
                   ctx->esc_values[0] -= 1;

     

       480
       480
       +
                   if (ctx->esc_values[0] >= ctx->cols)

     

       481
       481
       +
                       ctx->esc_values[0] = ctx->cols - 1;

     

       482
       482
       +
                   ctx->set_cursor_pos(ctx, ctx->esc_values[0], y);

     

       483
       483
       +
                   break;

     

       484
       484
       +
               case 'H':

     

       485
       485
       +
               case 'f':

     

       486
       486
       +
                   ctx->esc_values[0] -= 1;

     

       487
       487
       +
                   ctx->esc_values[1] -= 1;

     

       488
       488
       +
                   if (ctx->esc_values[1] >= ctx->cols)

     

       489
       489
       +
                       ctx->esc_values[1] = ctx->cols - 1;

     

       490
       490
       +
                   if (ctx->esc_values[0] >= ctx->rows)

     

       491
       491
       +
                       ctx->esc_values[0] = ctx->rows - 1;

     

       492
       492
       +
                   ctx->set_cursor_pos(ctx, ctx->esc_values[1], ctx->esc_values[0]);

     

       493
       493
       +
                   break;

     

       494
       494
       +
               case 'n':

     

       495
       495
       +
                   switch (ctx->esc_values[0]) {

     

       496
       496
       +
                       case 5:

     

       497
       497
       +
                           if (ctx->callback != NULL) {

     

       498
       498
       +
                               ctx->callback(ctx, TERM_CB_STATUS_REPORT, 0, 0, 0);

     

       499
       499
       +
                           }

     

       500
       500
       +
                           break;

     

       501
       501
       +
                       case 6:

     

       502
       502
       +
                           if (ctx->callback != NULL) {

     

       503
       503
       +
                               ctx->callback(ctx, TERM_CB_POS_REPORT, x + 1, y + 1, 0);

     

       504
       504
       +
                           }

     

       505
       505
       +
                           break;

     

       506
       506
       +
                   }

     

       507
       507
       +
                   break;

     

       508
       508
       +
               case 'q':

     

       509
       509
       +
                   if (ctx->callback != NULL) {

     

       510
       510
       +
                       ctx->callback(ctx, TERM_CB_KBD_LEDS, ctx->esc_values[0], 0, 0);

     

       511
       511
       +
                   }

     

       512
       512
       +
                   break;

     

       513
       513
       +
               case 'J':

     

       514
       514
       +
                   switch (ctx->esc_values[0]) {

     

       515
       515
       +
                       case 0: {

     

       516
       516
       +
                           size_t rows_remaining = ctx->rows - (y + 1);

     

       517
       517
       +
                           size_t cols_diff = ctx->cols - (x + 1);

     

       518
       518
       +
                           size_t to_clear = rows_remaining * ctx->cols + cols_diff;

     

       519
       519
       +
                           for (size_t i = 0; i < to_clear; i++) {

     

       520
       520
       +
                               ctx->raw_putchar(ctx, ' ');

     

       521
       521
       +
                           }

     

       522
       522
       +
                           ctx->set_cursor_pos(ctx, x, y);

     

       523
       523
       +
                           break;

     

       524
       524
       +
                       }

     

       525
       525
       +
                       case 1: {

     

       526
       526
       +
                           ctx->set_cursor_pos(ctx, 0, 0);

     

       527
       527
       +
                           bool b = false;

     

       528
       528
       +
                           for (size_t yc = 0; yc < ctx->rows; yc++) {

     

       529
       529
       +
                               for (size_t xc = 0; xc < ctx->cols; xc++) {

     

       530
       530
       +
                                   ctx->raw_putchar(ctx, ' ');

     

       531
       531
       +
                                   if (xc == x && yc == y) {

     

       532
       532
       +
                                       ctx->set_cursor_pos(ctx, x, y);

     

       533
       533
       +
                                       b = true;

     

       534
       534
       +
                                       break;

     

       535
       535
       +
                                   }

     

       536
       536
       +
                               }

     

       537
       537
       +
                               if (b == true)

     

       538
       538
       +
                                   break;

     

       539
       539
       +
                           }

     

       540
       540
       +
                           break;

     

       541
       541
       +
                       }

     

       542
       542
       +
                       case 2:

     

       543
       543
       +
                       case 3:

     

       544
       544
       +
                           ctx->clear(ctx, false);

     

       545
       545
       +
                           break;

     

       546
       546
       +
                   }

     

       547
       547
       +
                   break;

     

       548
       548
       +
               case '@':

     

       549
       549
       +
                   for (size_t i = ctx->cols - 1; ; i--) {

     

       550
       550
       +
                       ctx->move_character(ctx, i + ctx->esc_values[0], y, i, y);

     

       551
       551
       +
                       ctx->set_cursor_pos(ctx, i, y);

     

       552
       552
       +
                       ctx->raw_putchar(ctx, ' ');

     

       553
       553
       +
                       if (i == x) {

     

       554
       554
       +
                           break;

     

       555
       555
       +
                       }

     

       556
       556
       +
                   }

     

       557
       557
       +
                   ctx->set_cursor_pos(ctx, x, y);

     

       558
       558
       +
                   break;

     

       559
       559
       +
               case 'P':

     

       560
       560
       +
                   for (size_t i = x + ctx->esc_values[0]; i < ctx->cols; i++)

     

       561
       561
       +
                       ctx->move_character(ctx, i - ctx->esc_values[0], y, i, y);

     

       562
       562
       +
                   ctx->set_cursor_pos(ctx, ctx->cols - ctx->esc_values[0], y);

     

       563
       563
       +
                   // FALLTHRU

     

       564
       564
       +
               case 'X':

     

       565
       565
       +
                   for (size_t i = 0; i < ctx->esc_values[0]; i++)

     

       566
       566
       +
                       ctx->raw_putchar(ctx, ' ');

     

       567
       567
       +
                   ctx->set_cursor_pos(ctx, x, y);

     

       568
       568
       +
                   break;

     

       569
       569
       +
               case 'm':

     

       570
       570
       +
                   sgr(ctx);

     

       571
       571
       +
                   break;

     

       572
       572
       +
               case 's':

     

       573
       573
       +
                   ctx->get_cursor_pos(ctx, &ctx->saved_cursor_x, &ctx->saved_cursor_y);

     

       574
       574
       +
                   break;

     

       575
       575
       +
               case 'u':

     

       576
       576
       +
                   ctx->set_cursor_pos(ctx, ctx->saved_cursor_x, ctx->saved_cursor_y);

     

       577
       577
       +
                   break;

     

       578
       578
       +
               case 'K':

     

       579
       579
       +
                   switch (ctx->esc_values[0]) {

     

       580
       580
       +
                       case 0: {

     

       581
       581
       +
                           for (size_t i = x; i < ctx->cols; i++)

     

       582
       582
       +
                               ctx->raw_putchar(ctx, ' ');

     

       583
       583
       +
                           ctx->set_cursor_pos(ctx, x, y);

     

       584
       584
       +
                           break;

     

       585
       585
       +
                       }

     

       586
       586
       +
                       case 1: {

     

       587
       587
       +
                           ctx->set_cursor_pos(ctx, 0, y);

     

       588
       588
       +
                           for (size_t i = 0; i < x; i++)

     

       589
       589
       +
                               ctx->raw_putchar(ctx, ' ');

     

       590
       590
       +
                           break;

     

       591
       591
       +
                       }

     

       592
       592
       +
                       case 2: {

     

       593
       593
       +
                           ctx->set_cursor_pos(ctx, 0, y);

     

       594
       594
       +
                           for (size_t i = 0; i < ctx->cols; i++)

     

       595
       595
       +
                               ctx->raw_putchar(ctx, ' ');

     

       596
       596
       +
                           ctx->set_cursor_pos(ctx, x, y);

     

       597
       597
       +
                           break;

     

       598
       598
       +
                       }

     

       599
       599
       +
                   }

     

       600
       600
       +
                   break;

     

       601
       601
       +
               case 'r':

     

       602
       602
       +
                   ctx->scroll_top_margin = 0;

     

       603
       603
       +
                   ctx->scroll_bottom_margin = ctx->rows;

     

       604
       604
       +
                   if (ctx->esc_values_i > 0) {

     

       605
       605
       +
                       ctx->scroll_top_margin = ctx->esc_values[0] - 1;

     

       606
       606
       +
                   }

     

       607
       607
       +
                   if (ctx->esc_values_i > 1) {

     

       608
       608
       +
                       ctx->scroll_bottom_margin = ctx->esc_values[1];

     

       609
       609
       +
                   }

     

       610
       610
       +
                   if (ctx->scroll_top_margin >= ctx->rows

     

       611
       611
       +
                    || ctx->scroll_bottom_margin > ctx->rows

     

       612
       612
       +
                    || ctx->scroll_top_margin >= (ctx->scroll_bottom_margin - 1)) {

     

       613
       613
       +
                       ctx->scroll_top_margin = 0;

     

       614
       614
       +
                       ctx->scroll_bottom_margin = ctx->rows;

     

       615
       615
       +
                   }

     

       616
       616
       +
                   ctx->set_cursor_pos(ctx, 0, 0);

     

       617
       617
       +
                   break;

     

       618
       618
       +
               case 'l':

     

       619
       619
       +
               case 'h':

     

       620
       620
       +
                   mode_toggle(ctx, c);

     

       621
       621
       +
                   break;

     

       622
       622
       +
               case ']':

     

       623
       623
       +
                   linux_private_parse(ctx);

     

       624
       624
       +
                   break;

     

       625
       625
       +
           }

     

       626
       626
       +
       

     

       627
       627
       +
           ctx->scroll_enabled = r;

     

       628
       628
       +
       

     

       629
       629
       +
       cleanup:

     

       630
       630
       +
           ctx->control_sequence = false;

     

       631
       631
       +
           ctx->escape = false;

     

       632
       632
       +
       }

     

       633
       633
       +
       

     

       634
       634
       +
       static void restore_state(struct term_context *ctx) {

     

       635
       635
       +
           ctx->bold = ctx->saved_state_bold;

     

       636
       636
       +
           ctx->reverse_video = ctx->saved_state_reverse_video;

     

       637
       637
       +
           ctx->current_charset = ctx->saved_state_current_charset;

     

       638
       638
       +
           ctx->current_primary = ctx->saved_state_current_primary;

     

       639
       639
       +
       

     

       640
       640
       +
           ctx->restore_state(ctx);

     

       641
       641
       +
       }

     

       642
       642
       +
       

     

       643
       643
       +
       static void save_state(struct term_context *ctx) {

     

       644
       644
       +
           ctx->save_state(ctx);

     

       645
       645
       +
       

     

       646
       646
       +
           ctx->saved_state_bold = ctx->bold;

     

       647
       647
       +
           ctx->saved_state_reverse_video = ctx->reverse_video;

     

       648
       648
       +
           ctx->saved_state_current_charset = ctx->current_charset;

     

       649
       649
       +
           ctx->saved_state_current_primary = ctx->current_primary;

     

       650
       650
       +
       }

     

       651
       651
       +
       

     

       652
       652
       +
       static void escape_parse(struct term_context *ctx, uint8_t c) {

     

       653
       653
       +
           ctx->escape_offset++;

     

       654
       654
       +
       

     

       655
       655
       +
           if (ctx->control_sequence == true) {

     

       656
       656
       +
               control_sequence_parse(ctx, c);

     

       657
       657
       +
               return;

     

       658
       658
       +
           }

     

       659
       659
       +
       

     

       660
       660
       +
           if (ctx->csi == true) {

     

       661
       661
       +
               ctx->csi = false;

     

       662
       662
       +
               goto is_csi;

     

       663
       663
       +
           }

     

       664
       664
       +
       

     

       665
       665
       +
           size_t x, y;

     

       666
       666
       +
           ctx->get_cursor_pos(ctx, &x, &y);

     

       667
       667
       +
       

     

       668
       668
       +
           switch (c) {

     

       669
       669
       +
               case '[':

     

       670
       670
       +
       is_csi:

     

       671
       671
       +
                   for (size_t i = 0; i < TERM_MAX_ESC_VALUES; i++)

     

       672
       672
       +
                       ctx->esc_values[i] = 0;

     

       673
       673
       +
                   ctx->esc_values_i = 0;

     

       674
       674
       +
                   ctx->rrr = false;

     

       675
       675
       +
                   ctx->control_sequence = true;

     

       676
       676
       +
                   return;

     

       677
       677
       +
               case '7':

     

       678
       678
       +
                   save_state(ctx);

     

       679
       679
       +
                   break;

     

       680
       680
       +
               case '8':

     

       681
       681
       +
                   restore_state(ctx);

     

       682
       682
       +
                   break;

     

       683
       683
       +
               case 'c':

     

       684
       684
       +
                   term_context_reinit(ctx);

     

       685
       685
       +
                   ctx->clear(ctx, true);

     

       686
       686
       +
                   break;

     

       687
       687
       +
               case 'D':

     

       688
       688
       +
                   if (y == ctx->scroll_bottom_margin - 1) {

     

       689
       689
       +
                       ctx->scroll(ctx);

     

       690
       690
       +
                       ctx->set_cursor_pos(ctx, x, y);

     

       691
       691
       +
                   } else {

     

       692
       692
       +
                       ctx->set_cursor_pos(ctx, x, y + 1);

     

       693
       693
       +
                   }

     

       694
       694
       +
                   break;

     

       695
       695
       +
               case 'E':

     

       696
       696
       +
                   if (y == ctx->scroll_bottom_margin - 1) {

     

       697
       697
       +
                       ctx->scroll(ctx);

     

       698
       698
       +
                       ctx->set_cursor_pos(ctx, 0, y);

     

       699
       699
       +
                   } else {

     

       700
       700
       +
                       ctx->set_cursor_pos(ctx, 0, y + 1);

     

       701
       701
       +
                   }

     

       702
       702
       +
                   break;

     

       703
       703
       +
               case 'M':

     

       704
       704
       +
                   // "Reverse linefeed"

     

       705
       705
       +
                   if (y == ctx->scroll_top_margin) {

     

       706
       706
       +
                       ctx->revscroll(ctx);

     

       707
       707
       +
                       ctx->set_cursor_pos(ctx, 0, y);

     

       708
       708
       +
                   } else {

     

       709
       709
       +
                       ctx->set_cursor_pos(ctx, 0, y - 1);

     

       710
       710
       +
                   }

     

       711
       711
       +
                   break;

     

       712
       712
       +
               case 'Z':

     

       713
       713
       +
                   if (ctx->callback != NULL) {

     

       714
       714
       +
                       ctx->callback(ctx, TERM_CB_PRIVATE_ID, 0, 0, 0);

     

       715
       715
       +
                   }

     

       716
       716
       +
                   break;

     

       717
       717
       +
               case '(':

     

       718
       718
       +
               case ')':

     

       719
       719
       +
                   ctx->g_select = c - '\'';

     

       720
       720
       +
                   break;

     

       721
       721
       +
               case '\e':

     

       722
       722
       +
                   if (ctx->in_bootloader == true) {

     

       723
       723
       +
                       ctx->raw_putchar(ctx, c);

     

       724
       724
       +
                   }

     

       725
       725
       +
                   break;

     

       726
       726
       +
           }

     

       727
       727
       +
       

     

       728
       728
       +
           ctx->escape = false;

     

       729
       729
       +
       }

     

       730
       730
       +
       

     

       731
       731
       +
       static uint8_t dec_special_to_cp437(uint8_t c) {

     

       732
       732
       +
           switch (c) {

     

       733
       733
       +
               case '`': return 0x04;

     

       734
       734
       +
               case '0': return 0xdb;

     

       735
       735
       +
               case '-': return 0x18;

     

       736
       736
       +
               case ',': return 0x1b;

     

       737
       737
       +
               case '.': return 0x19;

     

       738
       738
       +
               case 'a': return 0xb1;

     

       739
       739
       +
               case 'f': return 0xf8;

     

       740
       740
       +
               case 'g': return 0xf1;

     

       741
       741
       +
               case 'h': return 0xb0;

     

       742
       742
       +
               case 'j': return 0xd9;

     

       743
       743
       +
               case 'k': return 0xbf;

     

       744
       744
       +
               case 'l': return 0xda;

     

       745
       745
       +
               case 'm': return 0xc0;

     

       746
       746
       +
               case 'n': return 0xc5;

     

       747
       747
       +
               case 'q': return 0xc4;

     

       748
       748
       +
               case 's': return 0x5f;

     

       749
       749
       +
               case 't': return 0xc3;

     

       750
       750
       +
               case 'u': return 0xb4;

     

       751
       751
       +
               case 'v': return 0xc1;

     

       752
       752
       +
               case 'w': return 0xc2;

     

       753
       753
       +
               case 'x': return 0xb3;

     

       754
       754
       +
               case 'y': return 0xf3;

     

       755
       755
       +
               case 'z': return 0xf2;

     

       756
       756
       +
               case '~': return 0xfa;

     

       757
       757
       +
               case '_': return 0xff;

     

       758
       758
       +
               case '+': return 0x1a;

     

       759
       759
       +
               case '{': return 0xe3;

     

       760
       760
       +
               case '}': return 0x9c;

     

       761
       761
       +
           }

     

       762
       762
       +
       

     

       763
       763
       +
           return c;

     

       764
       764
       +
       }

     

       765
       765
       +
       

     

       766
       766
       +
       static void term_putchar(struct term_context *ctx, uint8_t c) {

     

       767
       767
       +
           if (ctx->discard_next || (ctx->in_bootloader == false && (c == 0x18 || c == 0x1a))) {

     

       768
       768
       +
               ctx->discard_next = false;

     

       769
       769
       +
               ctx->escape = false;

     

       770
       770
       +
               ctx->csi = false;

     

       771
       771
       +
               ctx->control_sequence = false;

     

       772
       772
       +
               ctx->g_select = 0;

     

       773
       773
       +
               return;

     

       774
       774
       +
           }

     

       775
       775
       +
       

     

       776
       776
       +
           if (ctx->escape == true) {

     

       777
       777
       +
               escape_parse(ctx, c);

     

       778
       778
       +
               return;

     

       779
       779
       +
           }

     

       780
       780
       +
       

     

       781
       781
       +
           if (ctx->g_select) {

     

       782
       782
       +
               ctx->g_select--;

     

       783
       783
       +
               switch (c) {

     

       784
       784
       +
                   case 'B':

     

       785
       785
       +
                       ctx->charsets[ctx->g_select] = CHARSET_DEFAULT; break;

     

       786
       786
       +
                   case '0':

     

       787
       787
       +
                       ctx->charsets[ctx->g_select] = CHARSET_DEC_SPECIAL; break;

     

       788
       788
       +
               }

     

       789
       789
       +
               ctx->g_select = 0;

     

       790
       790
       +
               return;

     

       791
       791
       +
           }

     

       792
       792
       +
       

     

       793
       793
       +
           size_t x, y;

     

       794
       794
       +
           ctx->get_cursor_pos(ctx, &x, &y);

     

       795
       795
       +
       

     

       796
       796
       +
           switch (c) {

     

       797
       797
       +
               case 0x00:

     

       798
       798
       +
               case 0x7f:

     

       799
       799
       +
                   return;

     

       800
       800
       +
               case 0x9b:

     

       801
       801
       +
                   ctx->csi = true;

     

       802
       802
       +
                   // FALLTHRU

     

       803
       803
       +
               case '\e':

     

       804
       804
       +
                   ctx->escape_offset = 0;

     

       805
       805
       +
                   ctx->escape = true;

     

       806
       806
       +
                   return;

     

       807
       807
       +
               case '\t':

     

       808
       808
       +
                   if ((x / ctx->tab_size + 1) >= ctx->cols) {

     

       809
       809
       +
                       ctx->set_cursor_pos(ctx, ctx->cols - 1, y);

     

       810
       810
       +
                       return;

     

       811
       811
       +
                   }

     

       812
       812
       +
                   ctx->set_cursor_pos(ctx, (x / ctx->tab_size + 1) * ctx->tab_size, y);

     

       813
       813
       +
                   return;

     

       814
       814
       +
               case 0x0b:

     

       815
       815
       +
               case 0x0c:

     

       816
       816
       +
               case '\n':

     

       817
       817
       +
                   if (y == ctx->scroll_bottom_margin - 1) {

     

       818
       818
       +
                       ctx->scroll(ctx);

     

       819
       819
       +
                       ctx->set_cursor_pos(ctx, 0, y);

     

       820
       820
       +
                   } else {

     

       821
       821
       +
                       ctx->set_cursor_pos(ctx, 0, y + 1);

     

       822
       822
       +
                   }

     

       823
       823
       +
                   return;

     

       824
       824
       +
               case '\b':

     

       825
       825
       +
                   ctx->set_cursor_pos(ctx, x - 1, y);

     

       826
       826
       +
                   return;

     

       827
       827
       +
               case '\r':

     

       828
       828
       +
                   ctx->set_cursor_pos(ctx, 0, y);

     

       829
       829
       +
                   return;

     

       830
       830
       +
               case '\a':

     

       831
       831
       +
                   // The bell is handled by the kernel

     

       832
       832
       +
                   if (ctx->callback != NULL) {

     

       833
       833
       +
                       ctx->callback(ctx, TERM_CB_BELL, 0, 0, 0);

     

       834
       834
       +
                   }

     

       835
       835
       +
                   return;

     

       836
       836
       +
               case 14:

     

       837
       837
       +
                   // Move to G1 set

     

       838
       838
       +
                   ctx->current_charset = 1;

     

       839
       839
       +
                   return;

     

       840
       840
       +
               case 15:

     

       841
       841
       +
                   // Move to G0 set

     

       842
       842
       +
                   ctx->current_charset = 0;

     

       843
       843
       +
                   return;

     

       844
       844
       +
           }

     

       845
       845
       +
       

     

       846
       846
       +
           if (ctx->insert_mode == true) {

     

       847
       847
       +
               for (size_t i = ctx->cols - 1; ; i--) {

     

       848
       848
       +
                   ctx->move_character(ctx, i + 1, y, i, y);

     

       849
       849
       +
                   if (i == x) {

     

       850
       850
       +
                       break;

     

       851
       851
       +
                   }

     

       852
       852
       +
               }

     

       853
       853
       +
           }

     

       854
       854
       +
       

     

       855
       855
       +
           // Translate character set

     

       856
       856
       +
           switch (ctx->charsets[ctx->current_charset]) {

     

       857
       857
       +
               case CHARSET_DEFAULT:

     

       858
       858
       +
                   break;

     

       859
       859
       +
               case CHARSET_DEC_SPECIAL:

     

       860
       860
       +
                   c = dec_special_to_cp437(c);

     

       861
       861
       +
           }

     

       862
       862
       +
       

     

       863
       863
       +
           ctx->raw_putchar(ctx, c);

     

       864
       864
       +
       }

+85

term.h

···

       1
       1
       +
       #ifndef _TERM_H

     

       2
       2
       +
       #define _TERM_H

     

       3
       3
       +
       

     

       4
       4
       +
       #include <stddef.h>

     

       5
       5
       +
       #include <stdint.h>

     

       6
       6
       +
       #include <stdbool.h>

     

       7
       7
       +
       

     

       8
       8
       +
       #define TERM_MAX_ESC_VALUES 16

     

       9
       9
       +
       

     

       10
       10
       +
       #define TERM_CB_DEC 10

     

       11
       11
       +
       #define TERM_CB_BELL 20

     

       12
       12
       +
       #define TERM_CB_PRIVATE_ID 30

     

       13
       13
       +
       #define TERM_CB_STATUS_REPORT 40

     

       14
       14
       +
       #define TERM_CB_POS_REPORT 50

     

       15
       15
       +
       #define TERM_CB_KBD_LEDS 60

     

       16
       16
       +
       #define TERM_CB_MODE 70

     

       17
       17
       +
       #define TERM_CB_LINUX 80

     

       18
       18
       +
       

     

       19
       19
       +
       struct term_context {

     

       20
       20
       +
           size_t rows, cols;

     

       21
       21
       +
       

     

       22
       22
       +
           size_t tab_size;

     

       23
       23
       +
       

     

       24
       24
       +
           bool autoflush;

     

       25
       25
       +
       

     

       26
       26
       +
           bool in_bootloader;

     

       27
       27
       +
       

     

       28
       28
       +
           bool scroll_enabled;

     

       29
       29
       +
           bool control_sequence;

     

       30
       30
       +
           bool csi;

     

       31
       31
       +
           bool escape;

     

       32
       32
       +
           bool rrr;

     

       33
       33
       +
           bool discard_next;

     

       34
       34
       +
           bool bold;

     

       35
       35
       +
           bool reverse_video;

     

       36
       36
       +
           bool dec_private;

     

       37
       37
       +
           bool insert_mode;

     

       38
       38
       +
           uint8_t g_select;

     

       39
       39
       +
           uint8_t charsets[2];

     

       40
       40
       +
           size_t current_charset;

     

       41
       41
       +
           size_t escape_offset;

     

       42
       42
       +
           size_t esc_values_i;

     

       43
       43
       +
           size_t saved_cursor_x;

     

       44
       44
       +
           size_t saved_cursor_y;

     

       45
       45
       +
           size_t current_primary;

     

       46
       46
       +
           size_t scroll_top_margin;

     

       47
       47
       +
           size_t scroll_bottom_margin;

     

       48
       48
       +
           uint32_t esc_values[TERM_MAX_ESC_VALUES];

     

       49
       49
       +
       

     

       50
       50
       +
           bool saved_state_bold;

     

       51
       51
       +
           bool saved_state_reverse_video;

     

       52
       52
       +
           size_t saved_state_current_charset;

     

       53
       53
       +
           size_t saved_state_current_primary;

     

       54
       54
       +
       

     

       55
       55
       +
           void (*raw_putchar)(struct term_context *, uint8_t c);

     

       56
       56
       +
           void (*clear)(struct term_context *, bool move);

     

       57
       57
       +
           void (*enable_cursor)(struct term_context *);

     

       58
       58
       +
           bool (*disable_cursor)(struct term_context *);

     

       59
       59
       +
           void (*set_cursor_pos)(struct term_context *, size_t x, size_t y);

     

       60
       60
       +
           void (*get_cursor_pos)(struct term_context *, size_t *x, size_t *y);

     

       61
       61
       +
           void (*set_text_fg)(struct term_context *, size_t fg);

     

       62
       62
       +
           void (*set_text_bg)(struct term_context *, size_t bg);

     

       63
       63
       +
           void (*set_text_fg_bright)(struct term_context *, size_t fg);

     

       64
       64
       +
           void (*set_text_bg_bright)(struct term_context *, size_t bg);

     

       65
       65
       +
           void (*set_text_fg_rgb)(struct term_context *, uint32_t fg);

     

       66
       66
       +
           void (*set_text_bg_rgb)(struct term_context *, uint32_t bg);

     

       67
       67
       +
           void (*set_text_fg_default)(struct term_context *);

     

       68
       68
       +
           void (*set_text_bg_default)(struct term_context *);

     

       69
       69
       +
           void (*move_character)(struct term_context *, size_t new_x, size_t new_y, size_t old_x, size_t old_y);

     

       70
       70
       +
           void (*scroll)(struct term_context *);

     

       71
       71
       +
           void (*revscroll)(struct term_context *);

     

       72
       72
       +
           void (*swap_palette)(struct term_context *);

     

       73
       73
       +
           void (*save_state)(struct term_context *);

     

       74
       74
       +
           void (*restore_state)(struct term_context *);

     

       75
       75
       +
           void (*double_buffer_flush)(struct term_context *);

     

       76
       76
       +
           void (*full_refresh)(struct term_context *);

     

       77
       77
       +
           void (*deinit)(struct term_context *, void (*)(void *, size_t));

     

       78
       78
       +
       

     

       79
       79
       +
           void (*callback)(struct term_context *, uint64_t, uint64_t, uint64_t, uint64_t);

     

       80
       80
       +
       };

     

       81
       81
       +
       

     

       82
       82
       +
       void term_context_reinit(struct term_context *ctx);

     

       83
       83
       +
       void term_write(struct term_context *ctx, const char *buf, size_t count);

     

       84
       84
       +
       

     

       85
       85
       +
       #endif