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foot/render.c
Daniel Eklöf 03319560f5
shm: scroll: keep shm pool around, and fix its size at max allowed 
This lessens the burden on (primarily) the compositor, since we no
longer tear down and re-create the SHM pool when scrolling.

The SHM pool is setup once, and its size is fixed at the maximum
allowed (512MB for now, 2GB would be possible).

This also allows us to mmap() the memfd once. The exposed raw pointer
is simply an offset from the memfd mmapping.

Note that this means e.g. rouge rendering code will be able to write
outside the buffer.

Finally, only do this if the caller explicitly wants to enable
scrolling. The memfd of other buffers are sized to the requested size.
2020-03-25 18:26:58 +01:00

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#include "render.h"
#include <string.h>
#include <sys/ioctl.h>
#include <sys/time.h>
#include <sys/timerfd.h>
#include <sys/prctl.h>
#include <wayland-cursor.h>
#include <xdg-shell.h>
#include <presentation-time.h>
#include <fcft/fcft.h>
#define LOG_MODULE "render"
#define LOG_ENABLE_DBG 0
#include "log.h"
#include "config.h"
#include "grid.h"
#include "quirks.h"
#include "selection.h"
#include "shm.h"
#define TIME_FRAME_RENDERING 0
#define TIME_SCROLL_DAMAGE 0
#define min(x, y) ((x) < (y) ? (x) : (y))
#define max(x, y) ((x) > (y) ? (x) : (y))
struct renderer {
struct fdm *fdm;
struct wayland *wayl;
};
static struct {
size_t total;
size_t zero; /* commits presented in less than one frame interval */
size_t one; /* commits presented in one frame interval */
size_t two; /* commits presented in two or more frame intervals */
} presentation_statistics = {0};
static void fdm_hook_refresh_pending_terminals(struct fdm *fdm, void *data);
struct renderer *
render_init(struct fdm *fdm, struct wayland *wayl)
{
struct renderer *renderer = calloc(1, sizeof(*renderer));
*renderer = (struct renderer) {
.fdm = fdm,
.wayl = wayl,
};
if (!fdm_hook_add(fdm, &fdm_hook_refresh_pending_terminals, renderer,
FDM_HOOK_PRIORITY_NORMAL))
{
LOG_ERR("failed to register FDM hook");
free(renderer);
return NULL;
}
return renderer;
}
void
render_destroy(struct renderer *renderer)
{
if (renderer == NULL)
return;
fdm_hook_del(renderer->fdm, &fdm_hook_refresh_pending_terminals,
FDM_HOOK_PRIORITY_NORMAL);
free(renderer);
}
static void __attribute__((destructor))
log_presentation_statistics(void)
{
if (presentation_statistics.total == 0)
return;
const size_t total = presentation_statistics.total;
LOG_INFO("presentation statistics: zero=%f%%, one=%f%%, two=%f%%",
100. * presentation_statistics.zero / total,
100. * presentation_statistics.one / total,
100. * presentation_statistics.two / total);
}
static void
sync_output(void *data,
struct wp_presentation_feedback *wp_presentation_feedback,
struct wl_output *output)
{
}
struct presentation_context {
struct terminal *term;
struct timeval input;
struct timeval commit;
};
static void
presented(void *data,
struct wp_presentation_feedback *wp_presentation_feedback,
uint32_t tv_sec_hi, uint32_t tv_sec_lo, uint32_t tv_nsec,
uint32_t refresh, uint32_t seq_hi, uint32_t seq_lo, uint32_t flags)
{
struct presentation_context *ctx = data;
struct terminal *term = ctx->term;
const struct timeval *input = &ctx->input;
const struct timeval *commit = &ctx->commit;
const struct timeval presented = {
.tv_sec = (uint64_t)tv_sec_hi << 32 | tv_sec_lo,
.tv_usec = tv_nsec / 1000,
};
bool use_input = (input->tv_sec > 0 || input->tv_usec > 0) &&
timercmp(&presented, input, >);
char msg[1024];
int chars = 0;
if (use_input && timercmp(&presented, input, <))
return;
else if (timercmp(&presented, commit, <))
return;
LOG_DBG("commit: %lu s %lu µs, presented: %lu s %lu µs",
commit->tv_sec, commit->tv_usec, presented.tv_sec, presented.tv_usec);
if (use_input) {
struct timeval diff;
timersub(commit, input, &diff);
chars += snprintf(&msg[chars], sizeof(msg) - chars,
"input - %lu µs -> ", diff.tv_usec);
}
struct timeval diff;
timersub(&presented, commit, &diff);
chars += snprintf(&msg[chars], sizeof(msg) - chars,
"commit - %lu µs -> ", diff.tv_usec);
if (use_input) {
assert(timercmp(&presented, input, >));
timersub(&presented, input, &diff);
} else {
assert(timercmp(&presented, commit, >));
timersub(&presented, commit, &diff);
}
chars += snprintf(&msg[chars], sizeof(msg) - chars,
"presented (total: %lu µs)", diff.tv_usec);
unsigned frame_count = 0;
if (tll_length(term->window->on_outputs) > 0) {
const struct monitor *mon = tll_front(term->window->on_outputs);
frame_count = (diff.tv_sec * 1000000. + diff.tv_usec) / (1000000. / mon->refresh);
}
presentation_statistics.total++;
if (frame_count >= 2)
presentation_statistics.two++;
else if (frame_count >= 1)
presentation_statistics.one++;
else
presentation_statistics.zero++;
#define _log_fmt "%s (more than %u frames)"
if (frame_count >= 2)
LOG_ERR(_log_fmt, msg, frame_count);
else if (frame_count >= 1)
LOG_WARN(_log_fmt, msg, frame_count);
else
LOG_INFO(_log_fmt, msg, frame_count);
#undef _log_fmt
wp_presentation_feedback_destroy(wp_presentation_feedback);
free(ctx);
}
static void
discarded(void *data, struct wp_presentation_feedback *wp_presentation_feedback)
{
struct presentation_context *ctx = data;
wp_presentation_feedback_destroy(wp_presentation_feedback);
free(ctx);
}
static const struct wp_presentation_feedback_listener presentation_feedback_listener = {
.sync_output = &sync_output,
.presented = &presented,
.discarded = &discarded,
};
static struct font *
attrs_to_font(const struct terminal *term, const struct attributes *attrs)
{
int idx = attrs->italic << 1 | attrs->bold;
return term->fonts[idx];
}
static inline struct rgb
color_hex_to_rgb(uint32_t color)
{
return (struct rgb){
((color >> 16) & 0xff) / 255.,
((color >> 8) & 0xff) / 255.,
((color >> 0) & 0xff) / 255.,
};
}
static inline pixman_color_t
color_hex_to_pixman_with_alpha(uint32_t color, uint16_t alpha)
{
if (alpha == 0)
return (pixman_color_t){0, 0, 0, 0};
int alpha_div = 0xffff / alpha;
return (pixman_color_t){
.red = ((color >> 16 & 0xff) | (color >> 8 & 0xff00)) / alpha_div,
.green = ((color >> 8 & 0xff) | (color >> 0 & 0xff00)) / alpha_div,
.blue = ((color >> 0 & 0xff) | (color << 8 & 0xff00)) / alpha_div,
.alpha = alpha,
};
}
static inline pixman_color_t
color_hex_to_pixman(uint32_t color)
{
/* Count on the compiler optimizing this */
return color_hex_to_pixman_with_alpha(color, 0xffff);
}
static inline void
color_dim(struct rgb *rgb)
{
rgb->r /= 2.;
rgb->g /= 2.;
rgb->b /= 2.;
}
static inline void
pixman_color_dim(pixman_color_t *color)
{
color->red /= 2;
color->green /= 2;
color->blue /= 2;
}
static inline void
pixman_color_dim_for_search(pixman_color_t *color)
{
color->red /= 3;
color->green /= 3;
color->blue /= 3;
}
static inline int
font_baseline(const struct terminal *term)
{
return term->fonts[0]->ascent;
}
static void
draw_unfocused_block(const struct terminal *term, pixman_image_t *pix,
const pixman_color_t *color, int x, int y, int cell_cols)
{
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, color, 4,
(pixman_rectangle16_t []){
{x, y, cell_cols * term->cell_width, 1}, /* top */
{x, y, 1, term->cell_height}, /* left */
{x + cell_cols * term->cell_width - 1, y, 1, term->cell_height}, /* right */
{x, y + term->cell_height - 1, cell_cols * term->cell_width, 1}, /* bottom */
});
}
static void
draw_bar(const struct terminal *term, pixman_image_t *pix,
const struct font *font,
const pixman_color_t *color, int x, int y)
{
int baseline = y + font_baseline(term) - term->fonts[0]->ascent;
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, color,
1, &(pixman_rectangle16_t){
x, baseline,
font->underline.thickness, term->fonts[0]->ascent + term->fonts[0]->descent});
}
static void
draw_underline(const struct terminal *term, pixman_image_t *pix,
const struct font *font,
const pixman_color_t *color, int x, int y, int cols)
{
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, color,
1, &(pixman_rectangle16_t){
x, y + font_baseline(term) - font->underline.position,
cols * term->cell_width, font->underline.thickness});
}
static void
draw_strikeout(const struct terminal *term, pixman_image_t *pix,
const struct font *font,
const pixman_color_t *color, int x, int y, int cols)
{
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, color,
1, &(pixman_rectangle16_t){
x, y + font_baseline(term) - font->strikeout.position,
cols * term->cell_width, font->strikeout.thickness});
}
static void
draw_cursor(const struct terminal *term, const struct cell *cell,
const struct font *font, pixman_image_t *pix, pixman_color_t *fg,
const pixman_color_t *bg, int x, int y, int cols)
{
pixman_color_t cursor_color;
pixman_color_t text_color;
bool is_selected = cell->attrs.selected;
if (term->cursor_color.cursor >> 31) {
cursor_color = color_hex_to_pixman(term->cursor_color.cursor);
text_color = color_hex_to_pixman(
term->cursor_color.text >> 31
? term->cursor_color.text : term->colors.bg);
if (term->reverse ^ cell->attrs.reverse ^ is_selected) {
pixman_color_t swap = cursor_color;
cursor_color = text_color;
text_color = swap;
}
if (term->is_searching && !is_selected) {
pixman_color_dim_for_search(&cursor_color);
pixman_color_dim_for_search(&text_color);
}
} else {
cursor_color = *fg;
text_color = *bg;
}
switch (term->cursor_style) {
case CURSOR_BLOCK:
if (!term->visual_focus)
draw_unfocused_block(term, pix, &cursor_color, x, y, cols);
else if (term->cursor_blink.state == CURSOR_BLINK_ON) {
*fg = text_color;
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, &cursor_color, 1,
&(pixman_rectangle16_t){x, y, cols * term->cell_width, term->cell_height});
}
break;
case CURSOR_BAR:
if (term->cursor_blink.state == CURSOR_BLINK_ON || !term->visual_focus)
draw_bar(term, pix, font, &cursor_color, x, y);
break;
case CURSOR_UNDERLINE:
if (term->cursor_blink.state == CURSOR_BLINK_ON || !term->visual_focus) {
draw_underline(
term, pix, attrs_to_font(term, &cell->attrs), &cursor_color,
x, y, cols);
}
break;
}
}
static int
render_cell(struct terminal *term, pixman_image_t *pix,
struct cell *cell, int col, int row, bool has_cursor)
{
if (cell->attrs.clean)
return 0;
cell->attrs.clean = 1;
int width = term->cell_width;
int height = term->cell_height;
int x = term->margins.left + col * width;
int y = term->margins.top + row * height;
assert(cell->attrs.selected == 0 || cell->attrs.selected == 1);
bool is_selected = cell->attrs.selected;
uint32_t _fg = 0;
uint32_t _bg = 0;
/* Use cell specific color, if set, otherwise the default colors (possible reversed) */
_fg = cell->attrs.have_fg ? cell->attrs.fg : term->colors.fg;
_bg = cell->attrs.have_bg ? cell->attrs.bg : term->colors.bg;
/* If *one* is set, we reverse */
if (term->reverse ^ cell->attrs.reverse ^ is_selected) {
uint32_t swap = _fg;
_fg = _bg;
_bg = swap;
}
if (cell->attrs.blink && term->blink.state == BLINK_OFF)
_fg = _bg;
pixman_color_t fg = color_hex_to_pixman(_fg);
pixman_color_t bg = color_hex_to_pixman_with_alpha(_bg, term->colors.alpha);
if (cell->attrs.dim)
pixman_color_dim(&fg);
if (term->is_searching && !is_selected) {
pixman_color_dim_for_search(&fg);
pixman_color_dim_for_search(&bg);
}
struct font *font = attrs_to_font(term, &cell->attrs);
const struct glyph *glyph = cell->wc != 0
? font_glyph_for_wc(font, cell->wc, term->colors.alpha == 0xffff)
: NULL;
int cell_cols = glyph != NULL ? max(1, glyph->cols) : 1;
/* Background */
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, pix, &bg, 1,
&(pixman_rectangle16_t){x, y, cell_cols * width, height});
if (cell->attrs.blink)
term_arm_blink_timer(term);
if (has_cursor && term->cursor_style == CURSOR_BLOCK)
draw_cursor(term, cell, font, pix, &fg, &bg, x, y, cell_cols);
if (cell->wc == 0 || cell->attrs.conceal)
goto draw_cursor;
if (glyph != NULL) {
if (unlikely(pixman_image_get_format(glyph->pix) == PIXMAN_a8r8g8b8)) {
/* Glyph surface is a pre-rendered image (typically a color emoji...) */
if (!(cell->attrs.blink && term->blink.state == BLINK_OFF)) {
pixman_image_composite32(
PIXMAN_OP_OVER, glyph->pix, NULL, pix, 0, 0, 0, 0,
x + glyph->x, y + font_baseline(term) - glyph->y,
glyph->width, glyph->height);
}
} else {
/* Glyph surface is an alpha mask */
pixman_image_t *src = pixman_image_create_solid_fill(&fg);
pixman_image_composite32(
PIXMAN_OP_OVER, src, glyph->pix, pix, 0, 0, 0, 0,
x + glyph->x, y + font_baseline(term) - glyph->y,
glyph->width, glyph->height);
pixman_image_unref(src);
}
}
/* Underline */
if (cell->attrs.underline) {
draw_underline(term, pix, attrs_to_font(term, &cell->attrs),
&fg, x, y, cell_cols);
}
if (cell->attrs.strikethrough) {
draw_strikeout(term, pix, attrs_to_font(term, &cell->attrs),
&fg, x, y, cell_cols);
}
draw_cursor:
if (has_cursor && term->cursor_style != CURSOR_BLOCK)
draw_cursor(term, cell, font, pix, &fg, &bg, x, y, cell_cols);
return cell_cols;
}
static void
render_margin(struct terminal *term, struct buffer *buf, int start_line, int end_line,
bool top, bool bottom)
{
/* Fill area outside the cell grid with the default background color */
const int rmargin = term->width - term->margins.right;
const int bmargin = term->height - term->margins.bottom;
const int line_count = end_line - start_line;
uint32_t _bg = !term->reverse ? term->colors.bg : term->colors.fg;
pixman_color_t bg = color_hex_to_pixman_with_alpha(_bg, term->colors.alpha);
if (term->is_searching)
pixman_color_dim(&bg);
if (top) {
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix, &bg, 1,
&(pixman_rectangle16_t){0, 0, term->width, term->margins.top});
wl_surface_damage_buffer(
term->window->surface, 0, 0, term->width, term->margins.top);
}
if (bottom) {
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix, &bg, 1,
&(pixman_rectangle16_t){0, bmargin, term->width, term->margins.bottom});
wl_surface_damage_buffer(
term->window->surface, 0, bmargin, term->width, term->margins.bottom);
}
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix, &bg, 2,
(pixman_rectangle16_t[]){
/* Left */
{0, term->margins.top + start_line * term->cell_height,
term->margins.left, line_count * term->cell_height},
/* Right */
{rmargin, term->margins.top + start_line * term->cell_height,
term->margins.right, line_count * term->cell_height},
});
/* Left */
wl_surface_damage_buffer(
term->window->surface,
0, term->margins.top + start_line * term->cell_height,
term->margins.left, line_count * term->cell_height);
/* Right */
wl_surface_damage_buffer(
term->window->surface,
rmargin, term->margins.top + start_line * term->cell_height,
term->margins.right, line_count * term->cell_height);
}
static void
grid_render_scroll(struct terminal *term, struct buffer *buf,
const struct damage *dmg)
{
int height = (dmg->scroll.region.end - dmg->scroll.region.start - dmg->scroll.lines) * term->cell_height;
LOG_DBG(
"damage: SCROLL: %d-%d by %d lines",
dmg->scroll.region.start, dmg->scroll.region.end, dmg->scroll.lines);
if (height <= 0)
return;
#if TIME_SCROLL_DAMAGE
struct timeval start_time;
gettimeofday(&start_time, NULL);
#endif
int dst_y = term->margins.top + (dmg->scroll.region.start + 0) * term->cell_height;
int src_y = term->margins.top + (dmg->scroll.region.start + dmg->scroll.lines) * term->cell_height;
/*
* SHM scrolling can be *much* faster, but it depends on how many
* lines we're scrolling, and how much repairing we need to do.
*
* In short, scrolling a *large* number of rows is faster with a
* memmove, while scrolling a *small* number of lines is faster
* with SHM scrolling.
*
* However, since we need to restore the scrolling regions when
* SHM scrolling, we also need to take this into account.
*
* Finally, we also have to restore the window margins, and this
* is a *huge* performance hit when scrolling a large number of
* lines (in addition to the sloweness of SHM scrolling as
* method).
*
* So, we need to figure out when to SHM scroll, and when to
* memmove.
*
* For now, assume that the both methods perform rougly the same,
* given an equal number of bytes to move/allocate, and use the
* method that results in the least amount of bytes to touch.
*
* Since number of lines directly translates to bytes, we can
* simply count lines.
*
* SHM scrolling needs to first "move" (punch hole + allocate)
* dmg->scroll.lines number of lines, and then we need to restore
* the bottom scroll region.
*
* If the total number of lines is less than half the screen - use
* SHM. Otherwise use memmove.
*/
bool try_shm_scroll =
shm_can_scroll(buf) && (
dmg->scroll.lines +
dmg->scroll.region.start +
(term->rows - dmg->scroll.region.end)) < term->rows / 2;
bool did_shm_scroll = false;
//try_shm_scroll = false;
//try_shm_scroll = true;
if (try_shm_scroll) {
did_shm_scroll = shm_scroll(
term->wl->shm, buf, dmg->scroll.lines * term->cell_height,
term->margins.top, dmg->scroll.region.start * term->cell_height,
term->margins.bottom, (term->rows - dmg->scroll.region.end) * term->cell_height);
}
if (did_shm_scroll) {
/* Restore margins */
render_margin(
term, buf, dmg->scroll.region.end - dmg->scroll.lines, term->rows,
true, true);
} else {
/* Fallback for when we either cannot do SHM scrolling, or it failed */
uint8_t *raw = buf->mmapped;
memmove(raw + dst_y * buf->stride,
raw + src_y * buf->stride,
height * buf->stride);
}
#if TIME_SCROLL_DAMAGE
struct timeval end_time;
gettimeofday(&end_time, NULL);
struct timeval memmove_time;
timersub(&end_time, &start_time, &memmove_time);
LOG_INFO("scrolled %dKB (%d lines) using %s in %lds %ldus",
height * buf->stride / 1024, dmg->scroll.lines,
did_shm_scroll ? "SHM" : try_shm_scroll ? "memmove (SHM failed)" : "memmove",
memmove_time.tv_sec, memmove_time.tv_usec);
#endif
wl_surface_damage_buffer(
term->window->surface, term->margins.left, dst_y,
term->width - term->margins.left - term->margins.right, height);
}
static void
grid_render_scroll_reverse(struct terminal *term, struct buffer *buf,
const struct damage *dmg)
{
int height = (dmg->scroll.region.end - dmg->scroll.region.start - dmg->scroll.lines) * term->cell_height;
LOG_DBG(
"damage: SCROLL REVERSE: %d-%d by %d lines"m
dmg->scroll.region.start, dmg->scroll.region.end, dmg->scroll.lines);
if (height <= 0)
return;
#if TIME_SCROLL_DAMAGE
struct timeval start_time;
gettimeofday(&start_time, NULL);
#endif
int src_y = term->margins.top + (dmg->scroll.region.start + 0) * term->cell_height;
int dst_y = term->margins.top + (dmg->scroll.region.start + dmg->scroll.lines) * term->cell_height;
bool try_shm_scroll =
shm_can_scroll(buf) && (
dmg->scroll.lines +
dmg->scroll.region.start +
(term->rows - dmg->scroll.region.end)) < term->rows / 2;
bool did_shm_scroll = false;
if (try_shm_scroll) {
did_shm_scroll = shm_scroll(
term->wl->shm, buf, -dmg->scroll.lines * term->cell_height,
term->margins.top, dmg->scroll.region.start * term->cell_height,
term->margins.bottom, (term->rows - dmg->scroll.region.end) * term->cell_height);
}
if (did_shm_scroll) {
/* Restore margins */
render_margin(
term, buf, dmg->scroll.region.start, dmg->scroll.region.start + dmg->scroll.lines,
true, true);
} else {
/* Fallback for when we either cannot do SHM scrolling, or it failed */
uint8_t *raw = buf->mmapped;
memmove(raw + dst_y * buf->stride,
raw + src_y * buf->stride,
height * buf->stride);
}
#if TIME_SCROLL_DAMAGE
struct timeval end_time;
gettimeofday(&end_time, NULL);
struct timeval memmove_time;
timersub(&end_time, &start_time, &memmove_time);
LOG_INFO("scrolled REVERSE %dKB (%d lines) using %s in %lds %ldus",
height * buf->stride / 1024, dmg->scroll.lines,
did_shm_scroll ? "SHM" : try_shm_scroll ? "memmove (SHM failed)" : "memmove",
memmove_time.tv_sec, memmove_time.tv_usec);
#endif
wl_surface_damage_buffer(
term->window->surface, term->margins.left, dst_y,
term->width - term->margins.left - term->margins.right, height);
}
static void
render_sixel(struct terminal *term, pixman_image_t *pix,
const struct sixel *sixel)
{
int view_end = (term->grid->view + term->rows - 1) & (term->grid->num_rows - 1);
int first_visible_row = -1;
for (size_t i = sixel->pos.row; i < sixel->pos.row + sixel->rows; i++) {
int row = i & (term->grid->num_rows - 1);
if (view_end >= term->grid->view) {
/* Not wrapped */
if (row >= term->grid->view && row <= view_end) {
first_visible_row = i;
break;
}
} else {
/* Wrapped */
if (row >= term->grid->view || row <= view_end) {
first_visible_row = i;
break;
}
}
}
if (first_visible_row < 0)
return;
/* First visible (0 based) row of the image */
const int first_img_row = first_visible_row - sixel->pos.row;
/* Map first visible line to current grid view */
const int row = first_visible_row & (term->grid->num_rows - 1);
const int view_aligned =
(row - term->grid->view + term->grid->num_rows) & (term->grid->num_rows - 1);
/* Translate row/column to x/y pixel values */
const int x = term->margins.left + sixel->pos.col * term->cell_width;
const int y = max(
term->margins.top, term->margins.top + view_aligned * term->cell_height);
/* Width/height, in pixels - and don't touch the window margins */
const int width = min(sixel->width, term->width - x - term->margins.right);
const int height = min(
sixel->height - first_img_row * term->cell_height,
term->height - y - term->margins.bottom);
/* Verify we're not stepping outside the grid */
assert(x >= term->margins.left);
assert(y >= term->margins.top);
assert(x + width <= term->width - term->margins.right);
assert(y + height <= term->height - term->margins.bottom);
pixman_image_composite(
PIXMAN_OP_SRC,
sixel->pix,
NULL,
pix,
0, first_img_row * term->cell_height,
0, 0,
x, y,
width, height);
wl_surface_damage_buffer(term->window->surface, x, y, width, height);
}
static void
render_sixel_images(struct terminal *term, pixman_image_t *pix)
{
tll_foreach(term->grid->sixel_images, it)
render_sixel(term, pix, &it->item);
}
static void
render_row(struct terminal *term, pixman_image_t *pix, struct row *row, int row_no)
{
for (int col = term->cols - 1; col >= 0; col--)
render_cell(term, pix, &row->cells[col], col, row_no, false);
}
int
render_worker_thread(void *_ctx)
{
struct render_worker_context *ctx = _ctx;
struct terminal *term = ctx->term;
const int my_id = ctx->my_id;
free(ctx);
char proc_title[16];
snprintf(proc_title, sizeof(proc_title), "foot:render:%d", my_id);
if (prctl(PR_SET_NAME, proc_title, 0, 0, 0) < 0)
LOG_ERRNO("render worker %d: failed to set process title", my_id);
sem_t *start = &term->render.workers.start;
sem_t *done = &term->render.workers.done;
mtx_t *lock = &term->render.workers.lock;
cnd_t *cond = &term->render.workers.cond;
while (true) {
sem_wait(start);
struct buffer *buf = term->render.workers.buf;
bool frame_done = false;
while (!frame_done) {
mtx_lock(lock);
while (tll_length(term->render.workers.queue) == 0)
cnd_wait(cond, lock);
int row_no = tll_pop_front(term->render.workers.queue);
mtx_unlock(lock);
switch (row_no) {
default:
assert(buf != NULL);
render_row(term, buf->pix, grid_row_in_view(term->grid, row_no), row_no);
break;
case -1:
frame_done = true;
sem_post(done);
break;
case -2:
return 0;
}
}
};
return -1;
}
struct csd_data {
int x;
int y;
int width;
int height;
};
static struct csd_data
get_csd_data(const struct terminal *term, enum csd_surface surf_idx)
{
assert(term->window->use_csd == CSD_YES);
/* Only title bar is rendered in maximized mode */
const int border_width = !term->window->is_maximized
? term->conf->csd.border_width * term->scale : 0;
const int title_height = !term->window->is_fullscreen
? term->conf->csd.title_height * term->scale : 0;
const int button_width = !term->window->is_fullscreen
? term->conf->csd.button_width * term->scale : 0;
switch (surf_idx) {
case CSD_SURF_TITLE: return (struct csd_data){ 0, -title_height, term->width, title_height};
case CSD_SURF_LEFT: return (struct csd_data){-border_width, -title_height, border_width, title_height + term->height};
case CSD_SURF_RIGHT: return (struct csd_data){ term->width, -title_height, border_width, title_height + term->height};
case CSD_SURF_TOP: return (struct csd_data){-border_width, -title_height - border_width, term->width + 2 * border_width, border_width};
case CSD_SURF_BOTTOM: return (struct csd_data){-border_width, term->height, term->width + 2 * border_width, border_width};
/* Positioned relative to CSD_SURF_TITLE */
case CSD_SURF_MINIMIZE: return (struct csd_data){term->width - 3 * button_width, 0, button_width, title_height};
case CSD_SURF_MAXIMIZE: return (struct csd_data){term->width - 2 * button_width, 0, button_width, title_height};
case CSD_SURF_CLOSE: return (struct csd_data){term->width - 1 * button_width, 0, button_width, title_height};
case CSD_SURF_COUNT:
assert(false);
return (struct csd_data){0};
}
assert(false);
return (struct csd_data){0};
}
static void
csd_commit(struct terminal *term, struct wl_surface *surf, struct buffer *buf)
{
wl_surface_attach(surf, buf->wl_buf, 0, 0);
wl_surface_damage_buffer(surf, 0, 0, buf->width, buf->height);
wl_surface_set_buffer_scale(surf, term->scale);
wl_surface_commit(surf);
}
static void
render_csd_part(struct terminal *term,
struct wl_surface *surf, struct buffer *buf,
int width, int height, pixman_color_t *color)
{
assert(term->window->use_csd == CSD_YES);
pixman_image_t *src = pixman_image_create_solid_fill(color);
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix, color, 1,
&(pixman_rectangle16_t){0, 0, buf->width, buf->height});
pixman_image_unref(src);
}
static void
render_csd_title(struct terminal *term)
{
assert(term->window->use_csd == CSD_YES);
struct csd_data info = get_csd_data(term, CSD_SURF_TITLE);
struct wl_surface *surf = term->window->csd.surface[CSD_SURF_TITLE];
assert(info.width > 0 && info.height > 0);
unsigned long cookie = shm_cookie_csd(term, CSD_SURF_TITLE);
struct buffer *buf = shm_get_buffer(
term->wl->shm, info.width, info.height, cookie, false);
uint32_t _color = term->colors.default_fg;
uint16_t alpha = 0xffff;
if (term->conf->csd.color.title_set) {
_color = term->conf->csd.color.title;
alpha = _color >> 24 | (_color >> 24 << 8);
}
pixman_color_t color = color_hex_to_pixman_with_alpha(_color, alpha);
if (!term->visual_focus)
pixman_color_dim(&color);
render_csd_part(term, surf, buf, info.width, info.height, &color);
csd_commit(term, surf, buf);
}
static void
render_csd_border(struct terminal *term, enum csd_surface surf_idx)
{
assert(term->window->use_csd == CSD_YES);
assert(surf_idx >= CSD_SURF_LEFT && surf_idx <= CSD_SURF_BOTTOM);
struct csd_data info = get_csd_data(term, surf_idx);
struct wl_surface *surf = term->window->csd.surface[surf_idx];
if (info.width == 0 || info.height == 0)
return;
unsigned long cookie = shm_cookie_csd(term, surf_idx);
struct buffer *buf = shm_get_buffer(
term->wl->shm, info.width, info.height, cookie, false);
pixman_color_t color = color_hex_to_pixman_with_alpha(0, 0);
render_csd_part(term, surf, buf, info.width, info.height, &color);
csd_commit(term, surf, buf);
}
static void
render_csd_button_minimize(struct terminal *term, struct buffer *buf)
{
pixman_color_t color = color_hex_to_pixman(term->colors.default_bg);
pixman_image_t *src = pixman_image_create_solid_fill(&color);
const int max_height = buf->height / 2;
const int max_width = buf->width / 2;
int width = max_width;
int height = max_width / 2;
if (height > max_height) {
height = max_height;
width = height * 2;
}
assert(width <= max_width);
assert(height <= max_height);
int x_margin = (buf->width - width) / 2.;
int y_margin = (buf->height - height) / 2.;
pixman_triangle_t tri = {
.p1 = {
.x = pixman_int_to_fixed(x_margin),
.y = pixman_int_to_fixed(y_margin),
},
.p2 = {
.x = pixman_int_to_fixed(x_margin + width),
.y = pixman_int_to_fixed(y_margin),
},
.p3 = {
.x = pixman_int_to_fixed(buf->width / 2),
.y = pixman_int_to_fixed(y_margin + height),
},
};
pixman_composite_triangles(
PIXMAN_OP_OVER, src, buf->pix, PIXMAN_a1,
0, 0, 0, 0, 1, &tri);
pixman_image_unref(src);
}
static void
render_csd_button_maximize_maximized(
struct terminal *term, struct buffer *buf)
{
pixman_color_t color = color_hex_to_pixman(term->colors.default_bg);
pixman_image_t *src = pixman_image_create_solid_fill(&color);
const int max_height = buf->height / 3;
const int max_width = buf->width / 3;
int width = min(max_height, max_width);
int thick = 1 * term->scale;
const int x_margin = (buf->width - width) / 2;
const int y_margin = (buf->height - width) / 2;
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix, &color, 4,
(pixman_rectangle16_t[]){
{x_margin, y_margin, width, thick},
{x_margin, y_margin + thick, thick, width - 2 * thick},
{x_margin + width - thick, y_margin + thick, thick, width - 2 * thick},
{x_margin, y_margin + width - thick, width, thick}});
pixman_image_unref(src);
}
static void
render_csd_button_maximize_window(
struct terminal *term, struct buffer *buf)
{
pixman_color_t color = color_hex_to_pixman(term->colors.default_bg);
pixman_image_t *src = pixman_image_create_solid_fill(&color);
const int max_height = buf->height / 2;
const int max_width = buf->width / 2;
int width = max_width;
int height = max_width / 2;
if (height > max_height) {
height = max_height;
width = height * 2;
}
assert(width <= max_width);
assert(height <= max_height);
int x_margin = (buf->width - width) / 2.;
int y_margin = (buf->height - height) / 2.;
pixman_triangle_t tri = {
.p1 = {
.x = pixman_int_to_fixed(buf->width / 2),
.y = pixman_int_to_fixed(y_margin),
},
.p2 = {
.x = pixman_int_to_fixed(x_margin),
.y = pixman_int_to_fixed(y_margin + height),
},
.p3 = {
.x = pixman_int_to_fixed(x_margin + width),
.y = pixman_int_to_fixed(y_margin + height),
},
};
pixman_composite_triangles(
PIXMAN_OP_OVER, src, buf->pix, PIXMAN_a1,
0, 0, 0, 0, 1, &tri);
pixman_image_unref(src);
}
static void
render_csd_button_maximize(struct terminal *term, struct buffer *buf)
{
if (term->window->is_maximized)
render_csd_button_maximize_maximized(term, buf);
else
render_csd_button_maximize_window(term, buf);
}
static void
render_csd_button_close(struct terminal *term, struct buffer *buf)
{
pixman_color_t color = color_hex_to_pixman(term->colors.default_bg);
pixman_image_t *src = pixman_image_create_solid_fill(&color);
const int max_height = buf->height / 3;
const int max_width = buf->width / 3;
int width = min(max_height, max_width);
const int x_margin = (buf->width - width) / 2;
const int y_margin = (buf->height - width) / 2;
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix, &color, 1,
&(pixman_rectangle16_t){x_margin, y_margin, width, width});
pixman_image_unref(src);
}
static void
render_csd_button(struct terminal *term, enum csd_surface surf_idx)
{
assert(term->window->use_csd == CSD_YES);
assert(surf_idx >= CSD_SURF_MINIMIZE && surf_idx <= CSD_SURF_CLOSE);
struct csd_data info = get_csd_data(term, surf_idx);
struct wl_surface *surf = term->window->csd.surface[surf_idx];
if (info.width == 0 || info.height == 0)
return;
unsigned long cookie = shm_cookie_csd(term, surf_idx);
struct buffer *buf = shm_get_buffer(
term->wl->shm, info.width, info.height, cookie, false);
uint32_t _color;
uint16_t alpha = 0xffff;
bool is_active = false;
const bool *is_set = NULL;
const uint32_t *conf_color = NULL;
switch (surf_idx) {
case CSD_SURF_MINIMIZE:
_color = 0xff1e90ff;
is_set = &term->conf->csd.color.minimize_set;
conf_color = &term->conf->csd.color.minimize;
is_active = term->active_surface == TERM_SURF_BUTTON_MINIMIZE;
break;
case CSD_SURF_MAXIMIZE:
_color = 0xff30ff30;
is_set = &term->conf->csd.color.maximize_set;
conf_color = &term->conf->csd.color.maximize;
is_active = term->active_surface == TERM_SURF_BUTTON_MAXIMIZE;
break;
case CSD_SURF_CLOSE:
_color = 0xffff3030;
is_set = &term->conf->csd.color.close_set;
conf_color = &term->conf->csd.color.close;
is_active = term->active_surface == TERM_SURF_BUTTON_CLOSE;
break;
default:
assert(false);
break;
}
if (is_active) {
if (*is_set) {
_color = *conf_color;
alpha = _color >> 24 | (_color >> 24 << 8);
}
} else {
_color = 0;
alpha = 0;
}
pixman_color_t color = color_hex_to_pixman_with_alpha(_color, alpha);
if (!term->visual_focus)
pixman_color_dim(&color);
render_csd_part(term, surf, buf, info.width, info.height, &color);
switch (surf_idx) {
case CSD_SURF_MINIMIZE: render_csd_button_minimize(term, buf); break;
case CSD_SURF_MAXIMIZE: render_csd_button_maximize(term, buf); break;
case CSD_SURF_CLOSE: render_csd_button_close(term, buf); break;
break;
default:
assert(false);
break;
}
csd_commit(term, surf, buf);
}
static void
render_csd(struct terminal *term)
{
assert(term->window->use_csd == CSD_YES);
if (term->window->is_fullscreen)
return;
for (size_t i = 0; i < CSD_SURF_COUNT; i++) {
struct csd_data info = get_csd_data(term, i);
const int x = info.x;
const int y = info.y;
const int width = info.width;
const int height = info.height;
struct wl_surface *surf = term->window->csd.surface[i];
struct wl_subsurface *sub = term->window->csd.sub_surface[i];
assert(surf != NULL);
assert(sub != NULL);
if (width == 0 || height == 0) {
/* CSD borders aren't rendered in maximized mode */
assert(term->window->is_maximized || term->window->is_fullscreen);
wl_subsurface_set_position(sub, 0, 0);
wl_surface_attach(surf, NULL, 0, 0);
wl_surface_commit(surf);
continue;
}
wl_subsurface_set_position(sub, x / term->scale, y / term->scale);
}
for (size_t i = CSD_SURF_LEFT; i <= CSD_SURF_BOTTOM; i++)
render_csd_border(term, i);
for (size_t i = CSD_SURF_MINIMIZE; i <= CSD_SURF_CLOSE; i++)
render_csd_button(term, i);
render_csd_title(term);
}
static void frame_callback(
void *data, struct wl_callback *wl_callback, uint32_t callback_data);
static const struct wl_callback_listener frame_listener = {
.done = &frame_callback,
};
static void
grid_render(struct terminal *term)
{
if (term->is_shutting_down)
return;
#if TIME_FRAME_RENDERING
struct timeval start_time;
gettimeofday(&start_time, NULL);
#endif
assert(term->width > 0);
assert(term->height > 0);
unsigned long cookie = shm_cookie_grid(term);
struct buffer *buf = shm_get_buffer(
term->wl->shm, term->width, term->height, cookie, true);
pixman_image_set_clip_region(buf->pix, NULL);
/* If we resized the window, or is flashing, or just stopped flashing */
if (term->render.last_buf != buf ||
term->flash.active || term->render.was_flashing ||
term->is_searching != term->render.was_searching)
{
if (term->render.last_buf != NULL &&
term->render.last_buf->width == buf->width &&
term->render.last_buf->height == buf->height &&
!term->flash.active &&
!term->render.was_flashing &&
term->is_searching == term->render.was_searching)
{
static bool has_warned = false;
if (!has_warned) {
LOG_WARN(
"it appears your Wayland compositor does not support "
"buffer re-use for SHM clients; expect lower "
"performance.");
has_warned = true;
}
assert(term->render.last_buf->size == buf->size);
memcpy(buf->mmapped, term->render.last_buf->mmapped, buf->size);
}
else {
tll_free(term->grid->scroll_damage);
render_margin(term, buf, 0, term->rows, true, true);
term_damage_view(term);
}
term->render.last_buf = buf;
term->render.was_flashing = term->flash.active;
term->render.was_searching = term->is_searching;
}
/* Set clip region to prevent cells from overflowing into the margins */
pixman_region16_t clip;
pixman_region_init_rect(
&clip,
term->margins.left, term->margins.top,
term->cols * term->cell_width, term->rows * term->cell_height);
pixman_image_set_clip_region(buf->pix, &clip);
/* Erase old cursor (if we rendered a cursor last time) */
if (term->render.last_cursor.cell != NULL) {
struct cell *cell = term->render.last_cursor.cell;
struct coord at = term->render.last_cursor.in_view;
term->render.last_cursor.cell = NULL;
/* If cell is already dirty, it will be rendered anyway */
if (cell->attrs.clean) {
cell->attrs.clean = 0;
int cols = render_cell(term, buf->pix, cell, at.col, at.row, false);
wl_surface_damage_buffer(
term->window->surface,
term->margins.left + at.col * term->cell_width,
term->margins.top + at.row * term->cell_height,
cols * term->cell_width, term->cell_height);
}
}
tll_foreach(term->grid->scroll_damage, it) {
switch (it->item.type) {
case DAMAGE_SCROLL:
if (term->grid->view == term->grid->offset)
grid_render_scroll(term, buf, &it->item);
break;
case DAMAGE_SCROLL_REVERSE:
if (term->grid->view == term->grid->offset)
grid_render_scroll_reverse(term, buf, &it->item);
break;
case DAMAGE_SCROLL_IN_VIEW:
grid_render_scroll(term, buf, &it->item);
break;
case DAMAGE_SCROLL_REVERSE_IN_VIEW:
grid_render_scroll_reverse(term, buf, &it->item);
break;
}
tll_remove(term->grid->scroll_damage, it);
}
/* Reset clip region since scrolling may have instantiated a new pixman image */
pixman_image_set_clip_region(buf->pix, &clip);
if (term->render.workers.count > 0) {
term->render.workers.buf = buf;
for (size_t i = 0; i < term->render.workers.count; i++)
sem_post(&term->render.workers.start);
assert(tll_length(term->render.workers.queue) == 0);
for (int r = 0; r < term->rows; r++) {
struct row *row = grid_row_in_view(term->grid, r);
if (!row->dirty)
continue;
mtx_lock(&term->render.workers.lock);
tll_push_back(term->render.workers.queue, r);
cnd_signal(&term->render.workers.cond);
mtx_unlock(&term->render.workers.lock);
row->dirty = false;
wl_surface_damage_buffer(
term->window->surface,
term->margins.left, term->margins.top + r * term->cell_height,
term->width - term->margins.left - term->margins.right, term->cell_height);
}
mtx_lock(&term->render.workers.lock);
for (size_t i = 0; i < term->render.workers.count; i++)
tll_push_back(term->render.workers.queue, -1);
cnd_broadcast(&term->render.workers.cond);
mtx_unlock(&term->render.workers.lock);
} else {
for (int r = 0; r < term->rows; r++) {
struct row *row = grid_row_in_view(term->grid, r);
if (!row->dirty)
continue;
render_row(term, buf->pix, row, r);
row->dirty = false;
wl_surface_damage_buffer(
term->window->surface,
term->margins.left, term->margins.top + r * term->cell_height,
term->width - term->margins.left - term->margins.right, term->cell_height);
}
}
/*
* Determine if we need to render a cursor or not. The cursor
* could be hidden. Or it could have been scrolled out of view.
*/
bool cursor_is_visible = false;
int view_end = (term->grid->view + term->rows - 1) & (term->grid->num_rows - 1);
int cursor_row = (term->grid->offset + term->cursor.point.row) & (term->grid->num_rows - 1);
if (view_end >= term->grid->view) {
/* Not wrapped */
if (cursor_row >= term->grid->view && cursor_row <= view_end)
cursor_is_visible = true;
} else {
/* Wrapped */
if (cursor_row >= term->grid->view || cursor_row <= view_end)
cursor_is_visible = true;
}
/*
* Wait for workers to finish before we render the cursor. This is
* because the cursor cell might be dirty, in which case a worker
* will render it (but without the cursor).
*/
if (term->render.workers.count > 0) {
for (size_t i = 0; i < term->render.workers.count; i++)
sem_wait(&term->render.workers.done);
term->render.workers.buf = NULL;
}
if (cursor_is_visible && !term->hide_cursor) {
/* Remember cursor coordinates so that we can erase it next
* time. Note that we need to re-align it against the view. */
int view_aligned_row
= (cursor_row - term->grid->view + term->grid->num_rows) & (term->grid->num_rows - 1);
term->render.last_cursor.actual = term->cursor.point;
term->render.last_cursor.in_view = (struct coord) {
term->cursor.point.col, view_aligned_row};
struct row *row = grid_row_in_view(term->grid, view_aligned_row);
struct cell *cell = &row->cells[term->cursor.point.col];
cell->attrs.clean = 0;
term->render.last_cursor.cell = cell;
int cols_updated = render_cell(
term, buf->pix, cell, term->cursor.point.col, view_aligned_row, true);
wl_surface_damage_buffer(
term->window->surface,
term->margins.left + term->cursor.point.col * term->cell_width,
term->margins.top + view_aligned_row * term->cell_height,
cols_updated * term->cell_width, term->cell_height);
}
render_sixel_images(term, buf->pix);
if (term->flash.active) {
/* Note: alpha is pre-computed in each color component */
/* TODO: dim while searching */
pixman_image_set_clip_region(buf->pix, NULL);
pixman_image_fill_rectangles(
PIXMAN_OP_OVER, buf->pix,
&(pixman_color_t){.red=0x7fff, .green=0x7fff, .blue=0, .alpha=0x7fff},
1, &(pixman_rectangle16_t){0, 0, term->width, term->height});
wl_surface_damage_buffer(
term->window->surface, 0, 0, term->width, term->height);
}
assert(term->grid->offset >= 0 && term->grid->offset < term->grid->num_rows);
assert(term->grid->view >= 0 && term->grid->view < term->grid->num_rows);
assert(term->window->frame_callback == NULL);
term->window->frame_callback = wl_surface_frame(term->window->surface);
wl_callback_add_listener(term->window->frame_callback, &frame_listener, term);
wl_surface_set_buffer_scale(term->window->surface, term->scale);
if (term->wl->presentation != NULL && term->render.presentation_timings) {
struct timespec commit_time;
clock_gettime(term->wl->presentation_clock_id, &commit_time);
struct wp_presentation_feedback *feedback = wp_presentation_feedback(
term->wl->presentation, term->window->surface);
if (feedback == NULL) {
LOG_WARN("failed to create presentation feedback");
} else {
struct presentation_context *ctx = malloc(sizeof(*ctx));
*ctx = (struct presentation_context){
.term = term,
.input.tv_sec = term->render.input_time.tv_sec,
.input.tv_usec = term->render.input_time.tv_nsec / 1000,
.commit.tv_sec = commit_time.tv_sec,
.commit.tv_usec = commit_time.tv_nsec / 1000,
};
wp_presentation_feedback_add_listener(
feedback, &presentation_feedback_listener, ctx);
term->render.input_time.tv_sec = 0;
term->render.input_time.tv_nsec = 0;
}
}
wl_surface_attach(term->window->surface, buf->wl_buf, 0, 0);
quirk_kde_damage_before_attach(term->window->surface);
wl_surface_commit(term->window->surface);
#if TIME_FRAME_RENDERING
struct timeval end_time;
gettimeofday(&end_time, NULL);
struct timeval render_time;
timersub(&end_time, &start_time, &render_time);
LOG_INFO("frame rendered in %lds %ldus",
render_time.tv_sec, render_time.tv_usec);
#endif
}
static void
render_search_box(struct terminal *term)
{
assert(term->window->search_sub_surface != NULL);
const size_t wanted_visible_chars = max(20, term->search.len);
assert(term->scale >= 1);
const int scale = term->scale;
const size_t margin = 3 * scale;
const size_t width = term->width - 2 * margin;
const size_t visible_width = min(
term->width - 2 * margin,
2 * margin + wanted_visible_chars * term->cell_width);
const size_t height = min(
term->height - 2 * margin,
2 * margin + 1 * term->cell_height);
const size_t visible_chars = (visible_width - 2 * margin) / term->cell_width;
size_t glyph_offset = term->render.search_glyph_offset;
unsigned long cookie = shm_cookie_search(term);
struct buffer *buf = shm_get_buffer(term->wl->shm, width, height, cookie, false);
/* Background - yellow on empty/match, red on mismatch */
pixman_color_t color = color_hex_to_pixman(
term->search.match_len == term->search.len
? term->colors.table[3] : term->colors.table[1]);
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix, &color,
1, &(pixman_rectangle16_t){width - visible_width, 0, visible_width, height});
pixman_color_t transparent = color_hex_to_pixman_with_alpha(0, 0);
pixman_image_fill_rectangles(
PIXMAN_OP_SRC, buf->pix, &transparent,
1, &(pixman_rectangle16_t){0, 0, width - visible_width, height});
struct font *font = term->fonts[0];
int x = width - visible_width + margin;
int y = margin;
pixman_color_t fg = color_hex_to_pixman(term->colors.table[0]);
if (term->search.cursor < glyph_offset ||
term->search.cursor >= glyph_offset + visible_chars + 1)
{
/* Make sure cursor is always visible */
term->render.search_glyph_offset = glyph_offset = term->search.cursor;
}
/* Text (what the user entered - *not* match(es)) */
for (size_t i = glyph_offset;
i < term->search.len && i - glyph_offset < visible_chars;
i++)
{
if (i == term->search.cursor)
draw_bar(term, buf->pix, font, &fg, x, y);
const struct glyph *glyph = font_glyph_for_wc(font, term->search.buf[i], true);
if (glyph == NULL)
continue;
pixman_image_t *src = pixman_image_create_solid_fill(&fg);
pixman_image_composite32(
PIXMAN_OP_OVER, src, glyph->pix, buf->pix, 0, 0, 0, 0,
x + glyph->x, y + font_baseline(term) - glyph->y,
glyph->width, glyph->height);
pixman_image_unref(src);
x += term->cell_width;
}
if (term->search.cursor >= term->search.len)
draw_bar(term, buf->pix, font, &fg, x, y);
quirk_weston_subsurface_desync_on(term->window->search_sub_surface);
/* TODO: this is only necessary on a window resize */
wl_subsurface_set_position(
term->window->search_sub_surface,
margin / scale,
max(0, (int32_t)term->height - height - margin) / scale);
wl_surface_attach(term->window->search_surface, buf->wl_buf, 0, 0);
wl_surface_damage_buffer(term->window->search_surface, 0, 0, width, height);
wl_surface_set_buffer_scale(term->window->search_surface, scale);
struct wl_region *region = wl_compositor_create_region(term->wl->compositor);
if (region != NULL) {
wl_region_add(region, width - visible_width, 0, visible_width, height);
wl_surface_set_opaque_region(term->window->search_surface, region);
wl_region_destroy(region);
}
wl_surface_commit(term->window->search_surface);
quirk_weston_subsurface_desync_off(term->window->search_sub_surface);
}
static void
render_update_title(struct terminal *term)
{
/* TODO: figure out what the limit actually is */
static const size_t max_len = 100;
const char *title = term->window_title != NULL ? term->window_title : "foot";
char *copy = NULL;
if (strlen(title) > max_len) {
copy = strndup(title, max_len);
title = copy;
}
xdg_toplevel_set_title(term->window->xdg_toplevel, title);
free(copy);
}
static void
frame_callback(void *data, struct wl_callback *wl_callback, uint32_t callback_data)
{
struct terminal *term = data;
assert(term->window->frame_callback == wl_callback);
wl_callback_destroy(wl_callback);
term->window->frame_callback = NULL;
bool grid = term->render.pending.grid;
bool csd = term->render.pending.csd;
bool search = term->render.pending.search;
bool title = term->render.pending.title;
term->render.pending.grid = false;
term->render.pending.csd = false;
term->render.pending.search = false;
term->render.pending.title = false;
if (csd && term->window->use_csd == CSD_YES) {
quirk_weston_csd_on(term);
render_csd(term);
quirk_weston_csd_off(term);
}
if (title)
render_update_title(term);
if (search && term->is_searching)
render_search_box(term);
if (grid && (!term->delayed_render_timer.is_armed || csd || search))
grid_render(term);
}
/* Move to terminal.c? */
static bool
maybe_resize(struct terminal *term, int width, int height, bool force)
{
if (term->is_shutting_down)
return false;
if (!term->window->is_configured)
return false;
if (term->cell_width == 0 && term->cell_height == 0)
return false;
int scale = -1;
tll_foreach(term->window->on_outputs, it) {
if (it->item->scale > scale)
scale = it->item->scale;
}
if (scale == -1) {
/* Haven't 'entered' an output yet? */
scale = 1;
}
width *= scale;
height *= scale;
if (width == 0 && height == 0) {
/*
* The compositor is letting us choose the size
*
* If we have a "last" used size - use that. Otherwise, use
* the size from the user configuration.
*/
if (term->unmaximized_width != 0 && term->unmaximized_height != 0) {
width = term->unmaximized_width;
height = term->unmaximized_height;
} else {
width = term->conf->width;
height = term->conf->height;
if (term->window->use_csd == CSD_YES) {
/* Take CSD title bar into account */
assert(!term->window->is_fullscreen);
height -= term->conf->csd.title_height;
}
width *= scale;
height *= scale;
}
}
/* Don't shrink grid too much */
const int min_cols = 20;
const int min_rows = 4;
/* Minimum window size */
const int min_width = min_cols * term->cell_width;
const int min_height = min_rows * term->cell_height;
width = max(width, min_width);
height = max(height, min_height);
/* Padding */
const int max_pad_x = (width - min_width) / 2;
const int max_pad_y = (height - min_height) / 2;
const int pad_x = min(max_pad_x, scale * term->conf->pad_x);
const int pad_y = min(max_pad_y, scale * term->conf->pad_y);
if (!force && width == term->width && height == term->height && scale == term->scale)
return false;
selection_cancel(term);
/* Cancel an application initiated "Synchronized Update" */
term_disable_app_sync_updates(term);
term->width = width;
term->height = height;
term->scale = scale;
const int scrollback_lines = term->render.scrollback_lines;
/* Screen rows/cols before resize */
const int old_cols = term->cols;
const int old_rows = term->rows;
/* Screen rows/cols after resize */
const int new_cols = (term->width - 2 * pad_x) / term->cell_width;
const int new_rows = (term->height - 2 * pad_y) / term->cell_height;
/* Grid rows/cols after resize */
const int new_normal_grid_rows = 1 << (32 - __builtin_clz(new_rows + scrollback_lines - 1));
const int new_alt_grid_rows = 1 << (32 - __builtin_clz(new_rows));
assert(new_cols >= 1);
assert(new_rows >= 1);
/* Margins */
term->margins.left = pad_x;
term->margins.top = pad_y;
term->margins.right = term->width - new_cols * term->cell_width - term->margins.left;
term->margins.bottom = term->height - new_rows * term->cell_height - term->margins.top;
assert(term->margins.left >= pad_x);
assert(term->margins.right >= pad_x);
assert(term->margins.top >= pad_y);
assert(term->margins.bottom >= pad_y);
if (new_cols == old_cols && new_rows == old_rows) {
LOG_DBG("grid layout unaffected; skipping reflow");
goto damage_view;
}
/* Reflow grids */
int last_normal_row = grid_reflow(
&term->normal, new_normal_grid_rows, new_cols, old_rows, new_rows);
int last_alt_row = grid_reflow(
&term->alt, new_alt_grid_rows, new_cols, old_rows, new_rows);
/* Reset tab stops */
tll_free(term->tab_stops);
for (int c = 0; c < new_cols; c += 8)
tll_push_back(term->tab_stops, c);
term->cols = new_cols;
term->rows = new_rows;
LOG_DBG("resize: %dx%d, grid: cols=%d, rows=%d "
"(left-margin=%d, right-margin=%d, top-margin=%d, bottom-margin=%d)",
term->width, term->height, term->cols, term->rows,
term->margins.left, term->margins.right, term->margins.top, term->margins.bottom);
/* Signal TIOCSWINSZ */
if (ioctl(term->ptmx, TIOCSWINSZ,
&(struct winsize){
.ws_row = term->rows,
.ws_col = term->cols,
.ws_xpixel = term->cols * term->cell_width,
.ws_ypixel = term->rows * term->cell_height}) == -1)
{
LOG_ERRNO("TIOCSWINSZ");
}
if (term->scroll_region.start >= term->rows)
term->scroll_region.start = 0;
if (term->scroll_region.end >= old_rows)
term->scroll_region.end = term->rows;
/* Position cursor at the last copied row */
/* TODO: can we do better? */
int cursor_row = term->grid == &term->normal
? last_normal_row - term->normal.offset
: last_alt_row - term->alt.offset;
while (cursor_row < 0)
cursor_row += term->grid->num_rows;
assert(cursor_row >= 0);
assert(cursor_row < term->rows);
term_cursor_to(
term,
cursor_row,
min(term->cursor.point.col, term->cols - 1));
/* If in alt screen, update the saved 'normal' cursor too */
if (term->grid == &term->alt) {
int cursor_row = last_normal_row - term->normal.offset;
while (cursor_row < 0)
cursor_row += term->grid->num_rows;
term->alt_saved_cursor.lcf = false;
term->alt_saved_cursor.point.row = cursor_row;
term->alt_saved_cursor.point.col = min(
term->alt_saved_cursor.point.col, term->cols - 1);
}
term->render.last_cursor.cell = NULL;
damage_view:
if (!term->window->is_maximized && !term->window->is_fullscreen) {
term->unmaximized_width = term->width;
term->unmaximized_height = term->height;
}
#if 0
/* TODO: doesn't include CSD title bar */
xdg_toplevel_set_min_size(
term->window->xdg_toplevel, min_width / scale, min_height / scale);
#endif
{
bool title_shown = !term->window->is_fullscreen &&
term->window->use_csd == CSD_YES;
int title_height = title_shown ? term->conf->csd.title_height : 0;
xdg_surface_set_window_geometry(
term->window->xdg_surface,
0,
-title_height,
term->width / term->scale,
term->height / term->scale + title_height);
}
tll_free(term->normal.scroll_damage);
tll_free(term->alt.scroll_damage);
term->render.last_buf = NULL;
term_damage_view(term);
render_refresh_csd(term);
render_refresh_search(term);
render_refresh(term);
return true;
}
bool
render_resize(struct terminal *term, int width, int height)
{
return maybe_resize(term, width, height, false);
}
bool
render_resize_force(struct terminal *term, int width, int height)
{
return maybe_resize(term, width, height, true);
}
static void xcursor_callback(
void *data, struct wl_callback *wl_callback, uint32_t callback_data);
static const struct wl_callback_listener xcursor_listener = {
.done = &xcursor_callback,
};
static void
render_xcursor_update(struct wayland *wayl, const struct terminal *term)
{
/* If called from a frame callback, we may no longer have mouse focus */
if (wayl->mouse_focus != term)
return;
wayl->pointer.cursor = wl_cursor_theme_get_cursor(wayl->pointer.theme, term->xcursor);
if (wayl->pointer.cursor == NULL) {
LOG_ERR("%s: failed to load xcursor pointer '%s'",
wayl->pointer.theme_name, term->xcursor);
return;
}
wayl->pointer.xcursor = term->xcursor;
const int scale = term->scale;
struct wl_cursor_image *image = wayl->pointer.cursor->images[0];
wl_surface_attach(
wayl->pointer.surface, wl_cursor_image_get_buffer(image), 0, 0);
wl_pointer_set_cursor(
wayl->pointer.pointer, wayl->pointer.serial,
wayl->pointer.surface,
image->hotspot_x / scale, image->hotspot_y / scale);
wl_surface_damage_buffer(
wayl->pointer.surface, 0, 0, INT32_MAX, INT32_MAX);
wl_surface_set_buffer_scale(wayl->pointer.surface, scale);
assert(wayl->pointer.xcursor_callback == NULL);
wayl->pointer.xcursor_callback = wl_surface_frame(wayl->pointer.surface);
wl_callback_add_listener(wayl->pointer.xcursor_callback, &xcursor_listener, wayl);
wl_surface_commit(wayl->pointer.surface);
}
static void
xcursor_callback(void *data, struct wl_callback *wl_callback, uint32_t callback_data)
{
struct wayland *wayl = data;
assert(wayl->pointer.xcursor_callback == wl_callback);
wl_callback_destroy(wl_callback);
wayl->pointer.xcursor_callback = NULL;
if (wayl->pointer.pending_terminal != NULL) {
render_xcursor_update(wayl, wayl->pointer.pending_terminal);
wayl->pointer.pending_terminal = NULL;
}
}
static void
fdm_hook_refresh_pending_terminals(struct fdm *fdm, void *data)
{
struct renderer *renderer = data;
struct wayland *wayl = renderer->wayl;
tll_foreach(renderer->wayl->terms, it) {
struct terminal *term = it->item;
if (!term->render.refresh.grid &&
!term->render.refresh.csd &&
!term->render.refresh.search)
{
continue;
}
if (term->render.app_sync_updates.enabled &&
!term->render.refresh.csd &&
!term->render.refresh.search)
{
continue;
}
if (term->render.refresh.csd || term->render.refresh.search) {
/* Force update of parent surface */
term->render.refresh.grid = true;
}
assert(term->window->is_configured);
bool grid = term->render.refresh.grid;
bool csd = term->render.refresh.csd;
bool search = term->render.refresh.search;
bool title = term->render.refresh.title;
term->render.refresh.grid = false;
term->render.refresh.csd = false;
term->render.refresh.search = false;
term->render.refresh.title = false;
if (term->window->frame_callback == NULL) {
if (csd && term->window->use_csd == CSD_YES) {
quirk_weston_csd_on(term);
render_csd(term);
quirk_weston_csd_off(term);
}
if (title)
render_update_title(term);
if (search)
render_search_box(term);
if (grid)
grid_render(term);
} else {
/* Tells the frame callback to render again */
term->render.pending.grid |= grid;
term->render.pending.csd |= csd;
term->render.pending.search |= search;
term->render.pending.title |= title;
}
}
if (wayl->pointer.pending_terminal != NULL) {
if (wayl->pointer.xcursor_callback == NULL) {
render_xcursor_update(wayl, wayl->pointer.pending_terminal);
wayl->pointer.pending_terminal = NULL;
} else {
/* Frame callback will call render_xcursor_update() */
}
}
}
void
render_refresh_title(struct terminal *term)
{
term->render.refresh.title = true;
}
void
render_refresh(struct terminal *term)
{
term->render.refresh.grid = true;
}
void
render_refresh_csd(struct terminal *term)
{
if (term->window->use_csd == CSD_YES)
term->render.refresh.csd = true;
}
void
render_refresh_search(struct terminal *term)
{
if (term->is_searching)
term->render.refresh.search = true;
}
bool
render_xcursor_set(struct terminal *term)
{
struct wayland *wayl = term->wl;
if (wayl->pointer.theme == NULL)
return false;
if (wayl->mouse_focus == NULL) {
wayl->pointer.xcursor = NULL;
wayl->pointer.pending_terminal = NULL;
return true;
}
if (wayl->mouse_focus != term) {
/* This terminal doesn't have mouse focus */
return true;
}
if (wayl->pointer.xcursor == term->xcursor)
return true;
/* FDM hook takes care of actual rendering */
wayl->pointer.pending_terminal = term;
return true;
}
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