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Restore support for alternate character sets

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Needed by the execrable ncurses. Adds an extra branch in the hot path,
sigh. Thanks to branch prediction it doesnt have any measurable impact
on the benchmark, thankfully.
This commit is contained in:
Kovid Goyal
2024-02-15 12:50:54 +05:30
parent c19488f3be
commit 4caf8a6b14
6 changed files with 231 additions and 6 deletions
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9
kitty/screen.h
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@@ -56,9 +56,14 @@ typedef struct {
#define SAVEPOINTS_SZ 256
typedef struct CharsetState {
uint32_t *zero, *one, *current, current_num;
} CharsetState;
typedef struct {
Cursor cursor;
bool mDECOM, mDECAWM, mDECSCNM;
CharsetState charset;
bool is_valid;
} Savepoint;
@@ -83,7 +88,7 @@ typedef struct {
typedef struct {
PyObject_HEAD
unsigned int columns, lines, margin_top, margin_bottom, charset, scrolled_by;
unsigned int columns, lines, margin_top, margin_bottom, scrolled_by;
double pending_scroll_pixels_x, pending_scroll_pixels_y;
CellPixelSize cell_size;
OverlayLine overlay_line;
@@ -160,6 +165,7 @@ typedef struct {
GraphicsManager *grman;
Selections selections, url_ranges;
} paused_rendering;
CharsetState charset;
} Screen;
@@ -272,6 +278,7 @@ bool get_line_edge_colors(Screen *self, color_type *left, color_type *right);
bool parse_sgr(Screen *screen, const uint8_t *buf, unsigned int num, const char *report_name, bool is_deccara);
bool screen_pause_rendering(Screen *self, bool pause, int for_in_ms);
void screen_check_pause_rendering(Screen *self, monotonic_t now);
void screen_designate_charset(Screen *self, uint32_t which, uint32_t as);
#define DECLARE_CH_SCREEN_HANDLER(name) void screen_##name(Screen *screen);
DECLARE_CH_SCREEN_HANDLER(bell)
DECLARE_CH_SCREEN_HANDLER(backspace)