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Make screen_redraw_make_scene make sense.

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This commit is contained in:
Nicholas Marriott
2026-06-18 16:34:41 +01:00
parent 1e12fef94d
commit 483e5f32ce
1 changed files with 71 additions and 68 deletions
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139
screen-redraw.c
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@@ -148,15 +148,13 @@ struct redraw_line {
struct redraw_scene {
struct client *c;
struct window *w;
struct redraw_line *lines;
uint64_t generation;
u_int sx;
u_int sy;
u_int ox;
u_int oy;
struct redraw_line *lines;
};
/* Cell for building the scene. */
@@ -782,41 +780,33 @@ redraw_data_cmp(struct redraw_build_cell *a, struct redraw_build_cell *b)
return (0);
}
/* Convert the cells into spans. */
/* Build the temporary cells for a redraw scene. */
static void
redraw_finish_scene(struct redraw_build_ctx *bctx, struct redraw_scene *scene)
redraw_build_cells(struct redraw_build_ctx *bctx)
{
struct redraw_build_cell *bc, *last;
struct redraw_line *line;
struct redraw_span *span;
enum redraw_span_type type;
u_int x, y, x0;
struct window *w = bctx->w;
struct window_pane *wp;
size_t ncells;
u_int x, y;
for (y = 0; y < bctx->sy; y++) {
line = &scene->lines[y];
x = 0;
while (x < bctx->sx) {
x0 = x;
last = redraw_get_build_cell(bctx, x, y);
x++;
while (x < bctx->sx) {
bc = redraw_get_build_cell(bctx, x, y);
if (!redraw_data_cmp(last, bc))
break;
last = bc;
x++;
}
bc = redraw_get_build_cell(bctx, x0, y);
type = bc->data.type;
span = xcalloc(1, sizeof *span);
span->x = x0;
span->width = x - x0;
span->data = bc->data;
TAILQ_INSERT_TAIL(&line->spans[type], span, entry);
}
if (bctx->sx != 0 && bctx->sy > SIZE_MAX / bctx->sx)
fatalx("%s: too many cells", __func__);
ncells = (size_t)bctx->sx * bctx->sy;
if (ncells > redraw_ncells) {
redraw_cells = xreallocarray(redraw_cells, ncells,
sizeof *redraw_cells);
redraw_ncells = ncells;
}
bctx->cells = redraw_cells;
for (y = 0; y < bctx->sy; y++) {
for (x = 0; x < bctx->sx; x++)
redraw_reset_cell(bctx, x, y);
}
TAILQ_FOREACH_REVERSE(wp, &w->z_index, window_panes_zindex, zentry)
redraw_mark_pane(bctx, wp);
redraw_mark_two_pane_colours(bctx);
}
/*
@@ -826,55 +816,68 @@ redraw_finish_scene(struct redraw_build_ctx *bctx, struct redraw_scene *scene)
static struct redraw_scene *
redraw_make_scene(struct client *c)
{
struct redraw_build_ctx bctx;
struct redraw_scene *scene;
struct window_pane *wp;
u_int x, y, type;
size_t ncells;
struct session *s = c->session;
struct window *w = s->curw->window;
struct redraw_build_ctx bctx;
struct redraw_scene *scene;
struct redraw_build_cell *bc, *last;
struct redraw_line *line;
struct redraw_span *span;
enum redraw_span_type type;
u_int x, y, x0;
if (c->flags & CLIENT_SUSPENDED)
return (NULL);
redraw_set_context(c, &bctx);
log_debug("%s: building @%u scene (%ux%u %u,%u; generation %llu)",
c->name, w->id, bctx.sx, bctx.sy, bctx.ox, bctx.oy,
(unsigned long long)w->redraw_scene_generation);
redraw_build_cells(&bctx);
scene = xcalloc(1, sizeof *scene);
scene->c = c;
scene->w = bctx.w;
scene->generation = bctx.w->redraw_scene_generation;
scene->w = w;
scene->lines = xcalloc(bctx.sy, sizeof *scene->lines);
scene->generation = w->redraw_scene_generation;
scene->sx = bctx.sx;
scene->sy = bctx.sy;
scene->ox = bctx.ox;
scene->oy = bctx.oy;
log_debug("%s: starting @%u scene build (%ux%u %u,%u, generation %llu)",
c->name, scene->w->id, scene->sx, scene->sy, scene->ox, scene->oy,
(unsigned long long)scene->generation);
scene->lines = xcalloc(scene->sy, sizeof *scene->lines);
for (y = 0; y < scene->sy; y++) {
for (type = 0; type < REDRAW_SPAN_TYPES; type++)
TAILQ_INIT(&scene->lines[y].spans[type]);
}
if (bctx.sx != 0 && bctx.sy > SIZE_MAX / bctx.sx)
fatalx("%s: too many cells", __func__);
ncells = (size_t)bctx.sx * bctx.sy;
if (ncells > redraw_ncells) {
redraw_cells = xreallocarray(redraw_cells, ncells,
sizeof *redraw_cells);
redraw_ncells = ncells;
}
bctx.cells = redraw_cells;
for (y = 0; y < bctx.sy; y++) {
for (x = 0; x < bctx.sx; x++)
redraw_reset_cell(&bctx, x, y);
line = &scene->lines[y];
for (type = 0; type < REDRAW_SPAN_TYPES; type++)
TAILQ_INIT(&line->spans[type]);
x = 0;
while (x < bctx.sx) {
x0 = x;
last = redraw_get_build_cell(&bctx, x, y);
x++;
while (x < bctx.sx) {
bc = redraw_get_build_cell(&bctx, x, y);
if (!redraw_data_cmp(last, bc))
break;
last = bc;
x++;
}
bc = redraw_get_build_cell(&bctx, x0, y);
type = bc->data.type;
span = xcalloc(1, sizeof *span);
span->x = x0;
span->width = x - x0;
span->data = bc->data;
TAILQ_INSERT_TAIL(&line->spans[type], span, entry);
}
}
TAILQ_FOREACH_REVERSE(wp, &bctx.w->z_index, window_panes_zindex, zentry)
redraw_mark_pane(&bctx, wp);
redraw_mark_two_pane_colours(&bctx);
redraw_finish_scene(&bctx, scene);
log_debug("%s: finished @%u scene build", c->name, scene->w->id);
log_debug("%s: finished building @%u scene", c->name, w->id);
return (scene);
}