#include "render.h" #include #include #include #include #include #include #include #include #include #define LOG_MODULE "render" #define LOG_ENABLE_DBG 0 #include "log.h" #include "config.h" #include "grid.h" #include "selection.h" #include "shm.h" #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) { 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->x_margin + col * width; int y = term->y_margin + 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 (has_cursor) draw_cursor(term, cell, font, pix, &fg, &bg, x, y, cell_cols); if (cell->attrs.blink) term_arm_blink_timer(term); if (cell->wc == 0 || cell->attrs.conceal) return cell_cols; 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); } return cell_cols; } static void grid_render_scroll(struct terminal *term, struct buffer *buf, const struct damage *dmg) { int dst_y = term->y_margin + (dmg->scroll.region.start + 0) * term->cell_height; int src_y = term->y_margin + (dmg->scroll.region.start + dmg->scroll.lines) * term->cell_height; 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 (dst-y: %d, src-y: %d, " "height: %d, stride: %d, mmap-size: %zu)", dmg->scroll.region.start, dmg->scroll.region.end, dmg->scroll.lines, dst_y, src_y, height, buf->stride, buf->size); if (height > 0) { uint8_t *raw = buf->mmapped; memmove(raw + dst_y * buf->stride, raw + src_y * buf->stride, height * buf->stride); wl_surface_damage_buffer( term->window->surface, term->x_margin, dst_y, term->width - term->x_margin, height); } } static void grid_render_scroll_reverse(struct terminal *term, struct buffer *buf, const struct damage *dmg) { int src_y = term->y_margin + (dmg->scroll.region.start + 0) * term->cell_height; int dst_y = term->y_margin + (dmg->scroll.region.start + dmg->scroll.lines) * term->cell_height; 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 (dst-y: %d, src-y: %d, " "height: %d, stride: %d, mmap-size: %zu)", dmg->scroll.region.start, dmg->scroll.region.end, dmg->scroll.lines, dst_y, src_y, height, buf->stride, buf->size); if (height > 0) { uint8_t *raw = buf->mmapped; memmove(raw + dst_y * buf->stride, raw + src_y * buf->stride, height * buf->stride); wl_surface_damage_buffer( term->window->surface, term->x_margin, dst_y, term->width - term->x_margin, height); } } 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; } 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; #define TIME_FRAME_RENDERING 0 #if TIME_FRAME_RENDERING struct timeval start_time; gettimeofday(&start_time, NULL); #endif assert(term->width > 0); assert(term->height > 0); unsigned long cookie = (uintptr_t)term; struct buffer *buf = shm_get_buffer( term->wl->shm, term->width, term->height, cookie); wl_surface_attach(term->window->surface, buf->wl_buf, 0, 0); pixman_image_t *pix = buf->pix; /* 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 { /* Fill area outside the cell grid with the default background color */ int rmargin = term->x_margin + term->cols * term->cell_width; int bmargin = term->y_margin + term->rows * term->cell_height; int rmargin_width = term->width - rmargin; int bmargin_height = term->height - bmargin; 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); pixman_image_fill_rectangles( PIXMAN_OP_SRC, pix, &bg, 4, (pixman_rectangle16_t[]){ {0, 0, term->width, term->y_margin}, /* Top */ {0, 0, term->x_margin, term->height}, /* Left */ {rmargin, 0, rmargin_width, term->height}, /* Right */ {0, bmargin, term->width, bmargin_height}}); /* Bottom */ wl_surface_damage_buffer( term->window->surface, 0, 0, term->width, term->y_margin); wl_surface_damage_buffer( term->window->surface, 0, 0, term->x_margin, term->height); wl_surface_damage_buffer( term->window->surface, rmargin, 0, rmargin_width, term->height); wl_surface_damage_buffer( term->window->surface, 0, bmargin, term->width, bmargin_height); /* Force a full grid refresh */ term_damage_view(term); } term->render.last_buf = buf; term->render.was_flashing = term->flash.active; term->render.was_searching = term->is_searching; } /* 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, pix, cell, at.col, at.row, false); wl_surface_damage_buffer( term->window->surface, term->x_margin + at.col * term->cell_width, term->y_margin + 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); } 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->x_margin, term->y_margin + r * term->cell_height, term->width - term->x_margin, 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, pix, row, r); row->dirty = false; wl_surface_damage_buffer( term->window->surface, term->x_margin, term->y_margin + r * term->cell_height, term->width - term->x_margin, 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, pix, cell, term->cursor.point.col, view_aligned_row, true); wl_surface_damage_buffer( term->window->surface, term->x_margin + term->cursor.point.col * term->cell_width, term->y_margin + view_aligned_row * term->cell_height, cols_updated * term->cell_width, term->cell_height); } if (term->flash.active) { /* Note: alpha is pre-computed in each color component */ /* TODO: dim while searching */ pixman_image_fill_rectangles( PIXMAN_OP_OVER, 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_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 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; if (term->render.pending) { term->render.pending = false; grid_render(term); } } 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); const int scale = term->scale >= 1 ? term->scale : 1; const size_t margin = scale * 3; const size_t 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 = (width - 2 * margin) / term->cell_width; size_t glyph_offset = term->render.search_glyph_offset; unsigned long cookie = (uintptr_t)term + 1; struct buffer *buf = shm_get_buffer(term->wl->shm, width, height, cookie); /* 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){0, 0, width, height}); struct font *font = term->fonts[0]; int x = 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 + 2) { /* 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 + 1; 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); wl_subsurface_set_position( term->window->search_sub_surface, max(0, (int32_t)term->width - width - margin), max(0, (int32_t)term->height - height - margin)); wl_surface_damage_buffer(term->window->search_surface, 0, 0, width, height); wl_surface_attach(term->window->search_surface, buf->wl_buf, 0, 0); wl_surface_set_buffer_scale(term->window->search_surface, scale); wl_surface_commit(term->window->search_surface); } static int reflow(struct terminal *term, struct row **new_grid, int new_cols, int new_rows, struct row *const *old_grid, int old_cols, int old_rows, int offset) { int new_col_idx = 0; int new_row_idx = 0; struct row *new_row = new_grid[new_row_idx]; assert(new_row == NULL); new_row = grid_row_alloc(new_cols, true); new_grid[new_row_idx] = new_row; /* Start at the beginning of the old grid's scrollback. That is, * at the output that is *oldest* */ offset += term->rows; /* * Walk the old grid */ for (int r = 0; r < old_rows; r++) { /* Unallocated (empty) rows we can simply skip */ const struct row *old_row = old_grid[(offset + r) & (old_rows - 1)]; if (old_row == NULL) continue; /* * Keep track of empty cells. If the old line ends with a * string of empty cells, we don't need to, nor do we want to, * add those to the new line. However, if there are non-empty * cells *after* the string of empty cells, we need to emit * the empty cells too. And that may trigger linebreaks */ int empty_count = 0; /* Walk current line of the old grid */ for (int c = 0; c < old_cols; c++) { if (old_row->cells[c].wc == 0) { empty_count++; continue; } int old_cols_left = old_cols - c; int cols_needed = empty_count + old_cols_left; int new_cols_left = new_cols - new_col_idx; if (new_cols_left < cols_needed && new_cols_left >= old_cols_left) empty_count = max(0, empty_count - (cols_needed - new_cols_left)); for (int i = 0; i < empty_count + 1; i++) { const struct cell *old_cell = &old_row->cells[c - empty_count + i]; /* Out of columns on current row in new grid? */ if (new_col_idx >= new_cols) { /* * If last cell on last row and first cell on new * row are non-empty, wrap the line, otherwise * insert a hard line break. */ if (new_row->cells[new_cols - 1].wc == 0 || old_cell->wc == 0) { new_row->linebreak = true; } new_col_idx = 0; new_row_idx = (new_row_idx + 1) & (new_rows - 1); new_row = new_grid[new_row_idx]; if (new_row == NULL) { new_row = grid_row_alloc(new_cols, true); new_grid[new_row_idx] = new_row; } else { memset(new_row->cells, 0, new_cols * sizeof(new_row->cells[0])); new_row->linebreak = false; } } assert(new_row != NULL); assert(new_col_idx >= 0); assert(new_col_idx < new_cols); new_row->cells[new_col_idx] = *old_cell; new_row->cells[new_col_idx].attrs.clean = 1; new_col_idx++; } empty_count = 0; } if (old_row->linebreak) { new_row->linebreak = true; new_col_idx = 0; new_row_idx = (new_row_idx + 1) & (new_rows - 1); new_row = new_grid[new_row_idx]; if (new_row == NULL) { new_row = grid_row_alloc(new_cols, true); new_grid[new_row_idx] = new_row; } else { memset(new_row->cells, 0, new_cols * sizeof(new_row->cells[0])); new_row->linebreak = false; } } } return new_row_idx; } /* Move to terminal.c? */ static void maybe_resize(struct terminal *term, int width, int height, bool force) { if (!force && (width == 0 || height == 0)) return; 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 (!force && width == 0 && height == 0) { /* Assume we're not fully up and running yet */ return; } if (!force && width == term->width && height == term->height && scale == term->scale) return; 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; /* Grid rows/cols before resize */ const int old_normal_grid_rows = term->normal.num_rows; const int old_alt_grid_rows = term->alt.num_rows; /* Padding */ const int pad_x = term->width > 2 * scale * term->conf->pad_x ? scale * term->conf->pad_x : 0; const int pad_y = term->height > 2 * scale * term->conf->pad_y ? scale * term->conf->pad_y : 0; /* Screen rows/cols after resize */ const int new_cols = max((term->width - 2 * pad_x) / term->cell_width, 1); const int new_rows = max((term->height - 2 * pad_y) / term->cell_height, 1); /* 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->x_margin = (term->width - new_cols * term->cell_width) / 2; term->y_margin = (term->height - new_rows * term->cell_height) / 2; if (old_rows == new_rows && old_cols == new_cols) { /* Skip reflow if grid layout hasn't changed */ goto done; } /* Allocate new 'normal' and 'alt' grids */ struct row **normal = calloc(new_normal_grid_rows, sizeof(normal[0])); struct row **alt = calloc(new_alt_grid_rows, sizeof(alt[0])); /* Reflow content */ int last_normal_row = reflow( term, normal, new_cols, new_normal_grid_rows, term->normal.rows, old_cols, old_normal_grid_rows, term->normal.offset); int last_alt_row = reflow( term, alt, new_cols, new_alt_grid_rows, term->alt.rows, old_cols, old_alt_grid_rows, term->alt.offset); /* Re-set current row pointers */ term->normal.cur_row = normal[last_normal_row]; term->alt.cur_row = alt[last_alt_row]; /* Reset offset such that the last copied row ends up at the * bottom of the screen */ term->normal.offset = last_normal_row - new_rows + 1; term->alt.offset = last_alt_row - new_rows + 1; /* Can't have negative offsets, so wrap 'em */ while (term->normal.offset < 0) term->normal.offset += new_normal_grid_rows; while (term->alt.offset < 0) term->alt.offset += new_alt_grid_rows; /* Make sure offset doesn't point to empty line */ while (normal[term->normal.offset] == NULL) term->normal.offset = (term->normal.offset + 1) & (new_normal_grid_rows - 1); while (alt[term->alt.offset] == NULL) term->alt.offset = (term->alt.offset + 1) & (new_alt_grid_rows - 1); /* TODO: try to keep old view */ term->normal.view = term->normal.offset; term->alt.view = term->alt.offset; /* Make sure all visible lines have been allocated */ for (int r = 0; r < new_rows; r++) { int idx = (term->normal.offset + r) & (new_normal_grid_rows - 1); if (normal[idx] == NULL) normal[idx] = grid_row_alloc(new_cols, true); idx = (term->alt.offset + r) & (new_alt_grid_rows - 1); if (alt[idx] == NULL) alt[idx] = grid_row_alloc(new_cols, true); } /* Free old 'normal' grid */ for (int r = 0; r < term->normal.num_rows; r++) grid_row_free(term->normal.rows[r]); free(term->normal.rows); /* Free old 'alt' grid */ for (int r = 0; r < term->alt.num_rows; r++) grid_row_free(term->alt.rows[r]); free(term->alt.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; term->normal.rows = normal; term->normal.num_rows = new_normal_grid_rows; term->normal.num_cols = new_cols; term->alt.rows = alt; term->alt.num_rows = new_alt_grid_rows; term->alt.num_cols = new_cols; LOG_INFO("resize: %dx%d, grid: cols=%d, rows=%d (x-margin=%d, y-margin=%d)", term->width, term->height, term->cols, term->rows, term->x_margin, term->y_margin); /* 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)); term->render.last_cursor.cell = NULL; tll_free(term->normal.scroll_damage); tll_free(term->alt.scroll_damage); done: term->render.last_buf = NULL; term_damage_view(term); render_refresh(term); } void render_resize(struct terminal *term, int width, int height) { return maybe_resize(term, width, height, false); } void 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_needed) continue; if (term->render.app_sync_updates.enabled) continue; assert(term->window->is_configured); term->render.refresh_needed = false; if (term->window->frame_callback == NULL) grid_render(term); else { /* Tells the frame callback to render again */ term->render.pending = true; } } 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_set_title(struct terminal *term, const char *_title) { /* TODO: figure out what the limit actually is */ static const size_t max_len = 100; const char *title = _title; 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); } void render_refresh(struct terminal *term) { term->render.refresh_needed = 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; }