This is a fork of https://github.com/swaywm/sway that replaces pango with https://codeberg.org/dnkl/fcft for font rendering. Note: do not use the master branch; use one of the fontconfig branches
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#define _POSIX_C_SOURCE 200809L
#include <assert.h>
#include <linux/input-event-codes.h>
#include <limits.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include "cairo_util.h"
#include "pango.h"
#include "pool-buffer.h"
#include "swaybar/bar.h"
#include "swaybar/config.h"
#include "swaybar/i3bar.h"
#include "swaybar/ipc.h"
#include "swaybar/render.h"
#include "swaybar/status_line.h"
#if HAVE_TRAY
#include "swaybar/tray/tray.h"
#endif
#include "wlr-layer-shell-unstable-v1-client-protocol.h"
static const int WS_HORIZONTAL_PADDING = 5;
static const double WS_VERTICAL_PADDING = 1.5;
static const double BORDER_WIDTH = 1;
struct render_context {
cairo_t *cairo;
struct swaybar_output *output;
cairo_font_options_t *textaa_sharp;
cairo_font_options_t *textaa_safe;
uint32_t background_color;
};
static void choose_text_aa_mode(struct render_context *ctx, uint32_t fontcolor) {
uint32_t salpha = fontcolor & 0xFF;
uint32_t balpha = ctx->background_color & 0xFF;
// Subpixel antialiasing requires blend be done in cairo, not compositor
cairo_font_options_t *fo = salpha == balpha ?
ctx->textaa_sharp : ctx->textaa_safe;
cairo_set_font_options(ctx->cairo, fo);
// Color emojis, being semitransparent bitmaps, are leaky with 'SOURCE'
cairo_operator_t op = salpha == 0xFF ?
CAIRO_OPERATOR_OVER : CAIRO_OPERATOR_SOURCE;
cairo_set_operator(ctx->cairo, op);
}
static uint32_t render_status_line_error(struct render_context *ctx, double *x) {
struct swaybar_output *output = ctx->output;
const char *error = output->bar->status->text;
if (!error) {
return 0;
}
uint32_t height = output->height * output->scale;
cairo_t *cairo = ctx->cairo;
cairo_set_source_u32(cairo, 0xFF0000FF);
int margin = 3 * output->scale;
double ws_vertical_padding =
output->bar->config->status_padding * output->scale;
char *font = output->bar->config->font;
int text_width, text_height;
get_text_size(cairo, font, &text_width, &text_height, NULL,
output->scale, false, "%s", error);
uint32_t ideal_height = text_height + ws_vertical_padding * 2;
uint32_t ideal_surface_height = ideal_height / output->scale;
if (!output->bar->config->height &&
output->height < ideal_surface_height) {
return ideal_surface_height;
}
*x -= text_width + margin;
double text_y = height / 2.0 - text_height / 2.0;
cairo_move_to(cairo, *x, (int)floor(text_y));
choose_text_aa_mode(ctx, 0xFF0000FF);
pango_printf(cairo, font, output->scale, false, "%s", error);
*x -= margin;
return output->height;
}
static uint32_t render_status_line_text(struct render_context *ctx, double *x) {
struct swaybar_output *output = ctx->output;
const char *text = output->bar->status->text;
if (!text) {
return 0;
}
cairo_t *cairo = ctx->cairo;
struct swaybar_config *config = output->bar->config;
uint32_t fontcolor = output->focused ?
config->colors.focused_statusline : config->colors.statusline;
cairo_set_source_u32(cairo, fontcolor);
int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
output->scale, config->pango_markup, "%s", text);
double ws_vertical_padding = config->status_padding * output->scale;
int margin = 3 * output->scale;
uint32_t ideal_height = text_height + ws_vertical_padding * 2;
uint32_t ideal_surface_height = ideal_height / output->scale;
if (!output->bar->config->height &&
output->height < ideal_surface_height) {
return ideal_surface_height;
}
*x -= text_width + margin;
uint32_t height = output->height * output->scale;
double text_y = height / 2.0 - text_height / 2.0;
cairo_move_to(cairo, *x, (int)floor(text_y));
choose_text_aa_mode(ctx, fontcolor);
pango_printf(cairo, config->font, output->scale,
config->pango_markup, "%s", text);
*x -= margin;
return output->height;
}
static void render_sharp_rectangle(cairo_t *cairo, uint32_t color,
double x, double y, double width, double height) {
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
cairo_set_source_u32(cairo, color);
cairo_set_antialias(cairo, CAIRO_ANTIALIAS_NONE);
cairo_rectangle(cairo, x, y, width, height);
cairo_fill(cairo);
cairo_restore(cairo);
}
static void render_sharp_line(cairo_t *cairo, uint32_t color,
double x, double y, double width, double height) {
if (width > 1 && height > 1) {
render_sharp_rectangle(cairo, color, x, y, width, height);
} else {
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
cairo_set_source_u32(cairo, color);
cairo_set_antialias(cairo, CAIRO_ANTIALIAS_NONE);
if (width == 1) {
x += 0.5;
height += y;
width = x;
}
if (height == 1) {
y += 0.5;
width += x;
height = y;
}
cairo_move_to(cairo, x, y);
cairo_set_line_width(cairo, 1.0);
cairo_line_to(cairo, width, height);
cairo_stroke(cairo);
cairo_restore(cairo);
}
}
static enum hotspot_event_handling block_hotspot_callback(
struct swaybar_output *output, struct swaybar_hotspot *hotspot,
double x, double y, uint32_t button, void *data) {
struct i3bar_block *block = data;
struct status_line *status = output->bar->status;
return i3bar_block_send_click(status, block, x, y,
x - (double)hotspot->x / output->scale,
y - (double)hotspot->y / output->scale,
(double)hotspot->width / output->scale,
(double)hotspot->height / output->scale,
output->scale, button);
}
static void i3bar_block_unref_callback(void *data) {
i3bar_block_unref(data);
}
static uint32_t render_status_block(struct render_context *ctx,
struct i3bar_block *block, double *x, bool edge, bool use_short_text) {
if (!block->full_text || !*block->full_text) {
return 0;
}
char* text = block->full_text;
if (use_short_text && block->short_text && *block->short_text) {
text = block->short_text;
}
cairo_t *cairo = ctx->cairo;
struct swaybar_output *output = ctx->output;
struct swaybar_config *config = output->bar->config;
int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
output->scale, block->markup, "%s", text);
int margin = 3 * output->scale;
double ws_vertical_padding = config->status_padding * output->scale;
int width = text_width;
if (block->min_width_str) {
int w;
get_text_size(cairo, config->font, &w, NULL, NULL,
output->scale, block->markup, "%s", block->min_width_str);
block->min_width = w;
}
if (width < block->min_width) {
width = block->min_width;
}
double block_width = width;
uint32_t ideal_height = text_height + ws_vertical_padding * 2;
uint32_t ideal_surface_height = ideal_height / output->scale;
if (!output->bar->config->height &&
output->height < ideal_surface_height) {
return ideal_surface_height;
}
*x -= width;
if ((block->border || block->urgent) && block->border_left > 0) {
*x -= (block->border_left * output->scale + margin);
block_width += block->border_left * output->scale + margin;
}
if ((block->border || block->urgent) && block->border_right > 0) {
*x -= (block->border_right * output->scale + margin);
block_width += block->border_right * output->scale + margin;
}
int sep_width, sep_height;
int sep_block_width = block->separator_block_width;
if (!edge) {
if (config->sep_symbol) {
get_text_size(cairo, config->font, &sep_width, &sep_height, NULL,
output->scale, false, "%s", config->sep_symbol);
uint32_t _ideal_height = sep_height + ws_vertical_padding * 2;
uint32_t _ideal_surface_height = _ideal_height / output->scale;
if (!output->bar->config->height &&
output->height < _ideal_surface_height) {
return _ideal_surface_height;
}
if (block->separator && sep_width > sep_block_width) {
sep_block_width = sep_width + margin * 2;
}
}
*x -= sep_block_width;
} else if (config->status_edge_padding) {
*x -= config->status_edge_padding * output->scale;
}
uint32_t height = output->height * output->scale;
if (output->bar->status->click_events) {
struct swaybar_hotspot *hotspot = calloc(1, sizeof(struct swaybar_hotspot));
hotspot->x = *x;
hotspot->y = 0;
hotspot->width = width;
hotspot->height = height;
hotspot->callback = block_hotspot_callback;
hotspot->destroy = i3bar_block_unref_callback;
hotspot->data = block;
block->ref_count++;
wl_list_insert(&output->hotspots, &hotspot->link);
}
double x_pos = *x;
double y_pos = ws_vertical_padding;
double render_height = height - ws_vertical_padding * 2;
uint32_t bg_color = block->urgent
? config->colors.urgent_workspace.background : block->background;
if (bg_color) {
render_sharp_rectangle(cairo, bg_color, x_pos, y_pos,
block_width, render_height);
ctx->background_color = bg_color;
}
uint32_t border_color = block->urgent
? config->colors.urgent_workspace.border : block->border;
if (border_color && block->border_top > 0) {
render_sharp_line(cairo, border_color, x_pos, y_pos,
block_width, block->border_top * output->scale);
}
if (border_color && block->border_bottom > 0) {
render_sharp_line(cairo, border_color, x_pos,
y_pos + render_height - block->border_bottom * output->scale,
block_width, block->border_bottom * output->scale);
}
if (border_color && block->border_left > 0) {
render_sharp_line(cairo, border_color, x_pos, y_pos,
block->border_left * output->scale, render_height);
x_pos += block->border_left * output->scale + margin;
}
double offset = 0;
if (strncmp(block->align, "left", 5) == 0) {
offset = x_pos;
} else if (strncmp(block->align, "right", 5) == 0) {
offset = x_pos + width - text_width;
} else if (strncmp(block->align, "center", 6) == 0) {
offset = x_pos + (width - text_width) / 2;
}
double text_y = height / 2.0 - text_height / 2.0;
cairo_move_to(cairo, offset, (int)floor(text_y));
uint32_t color = output->focused ?
config->colors.focused_statusline : config->colors.statusline;
color = block->color_set ? block->color : color;
color = block->urgent ? config->colors.urgent_workspace.text : color;
cairo_set_source_u32(cairo, color);
choose_text_aa_mode(ctx, color);
pango_printf(cairo, config->font, output->scale,
block->markup, "%s", text);
x_pos += width;
if (block->border && block->border_right > 0) {
x_pos += margin;
render_sharp_line(cairo, border_color, x_pos, y_pos,
block->border_right * output->scale, render_height);
x_pos += block->border_right * output->scale;
}
if (!edge && block->separator) {
if (output->focused) {
color = config->colors.focused_separator;
} else {
color = config->colors.separator;
}
cairo_set_source_u32(cairo, color);
if (config->sep_symbol) {
offset = x_pos + (sep_block_width - sep_width) / 2;
double sep_y = height / 2.0 - sep_height / 2.0;
cairo_move_to(cairo, offset, (int)floor(sep_y));
choose_text_aa_mode(ctx, color);
pango_printf(cairo, config->font, output->scale, false,
"%s", config->sep_symbol);
} else {
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
cairo_set_line_width(cairo, 1);
cairo_move_to(cairo, x_pos + sep_block_width / 2, margin);
cairo_line_to(cairo, x_pos + sep_block_width / 2, height - margin);
cairo_stroke(cairo);
}
}
return output->height;
}
static void predict_status_block_pos(cairo_t *cairo,
struct swaybar_output *output, struct i3bar_block *block, double *x,
bool edge) {
if (!block->full_text || !*block->full_text) {
return;
}
struct swaybar_config *config = output->bar->config;
int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
output->scale, block->markup, "%s", block->full_text);
int margin = 3 * output->scale;
double ws_vertical_padding = config->status_padding * output->scale;
int width = text_width;
if (block->min_width_str) {
int w;
get_text_size(cairo, config->font, &w, NULL, NULL,
output->scale, block->markup, "%s", block->min_width_str);
block->min_width = w;
}
if (width < block->min_width) {
width = block->min_width;
}
uint32_t ideal_height = text_height + ws_vertical_padding * 2;
uint32_t ideal_surface_height = ideal_height / output->scale;
if (!output->bar->config->height &&
output->height < ideal_surface_height) {
return;
}
*x -= width;
if ((block->border || block->urgent) && block->border_left > 0) {
*x -= (block->border_left * output->scale + margin);
}
if ((block->border || block->urgent) && block->border_right > 0) {
*x -= (block->border_right * output->scale + margin);
}
int sep_width, sep_height;
int sep_block_width = block->separator_block_width;
if (!edge) {
if (config->sep_symbol) {
get_text_size(cairo, config->font, &sep_width, &sep_height, NULL,
output->scale, false, "%s", config->sep_symbol);
uint32_t _ideal_height = sep_height + ws_vertical_padding * 2;
uint32_t _ideal_surface_height = _ideal_height / output->scale;
if (!output->bar->config->height &&
output->height < _ideal_surface_height) {
return;
}
if (sep_width > sep_block_width) {
sep_block_width = sep_width + margin * 2;
}
}
*x -= sep_block_width;
} else if (config->status_edge_padding) {
*x -= config->status_edge_padding * output->scale;
}
}
static double predict_status_line_pos(cairo_t *cairo,
struct swaybar_output *output, double x) {
bool edge = x == output->width * output->scale;
struct i3bar_block *block;
wl_list_for_each(block, &output->bar->status->blocks, link) {
predict_status_block_pos(cairo, output, block, &x, edge);
edge = false;
}
return x;
}
static uint32_t predict_workspace_button_length(cairo_t *cairo,
struct swaybar_output *output,
struct swaybar_workspace *ws) {
struct swaybar_config *config = output->bar->config;
int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
output->scale, config->pango_markup, "%s", ws->label);
int ws_vertical_padding = WS_VERTICAL_PADDING * output->scale;
int ws_horizontal_padding = WS_HORIZONTAL_PADDING * output->scale;
int border_width = BORDER_WIDTH * output->scale;
uint32_t ideal_height = ws_vertical_padding * 2 + text_height
+ border_width * 2;
uint32_t ideal_surface_height = ideal_height / output->scale;
if (!output->bar->config->height &&
output->height < ideal_surface_height) {
return 0;
}
uint32_t width = text_width + ws_horizontal_padding * 2 + border_width * 2;
if (width < config->workspace_min_width * output->scale) {
width = config->workspace_min_width * output->scale;
}
return width;
}
static uint32_t predict_workspace_buttons_length(cairo_t *cairo,
struct swaybar_output *output) {
uint32_t width = 0;
if (output->bar->config->workspace_buttons) {
struct swaybar_workspace *ws;
wl_list_for_each(ws, &output->workspaces, link) {
width += predict_workspace_button_length(cairo, output, ws);
}
}
return width;
}
static uint32_t predict_binding_mode_indicator_length(cairo_t *cairo,
struct swaybar_output *output) {
const char *mode = output->bar->mode;
if (!mode) {
return 0;
}
struct swaybar_config *config = output->bar->config;
if (!config->binding_mode_indicator) {
return 0;
}
int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
output->scale, output->bar->mode_pango_markup,
"%s", mode);
int ws_vertical_padding = WS_VERTICAL_PADDING * output->scale;
int ws_horizontal_padding = WS_HORIZONTAL_PADDING * output->scale;
int border_width = BORDER_WIDTH * output->scale;
uint32_t ideal_height = text_height + ws_vertical_padding * 2
+ border_width * 2;
uint32_t ideal_surface_height = ideal_height / output->scale;
if (!output->bar->config->height &&
output->height < ideal_surface_height) {
return 0;
}
uint32_t width = text_width + ws_horizontal_padding * 2 + border_width * 2;
if (width < config->workspace_min_width * output->scale) {
width = config->workspace_min_width * output->scale;
}
return width;
}
static uint32_t render_status_line_i3bar(struct render_context *ctx, double *x) {
struct swaybar_output *output = ctx->output;
uint32_t max_height = 0;
bool edge = *x == output->width * output->scale;
struct i3bar_block *block;
bool use_short_text = false;
cairo_t *cairo = ctx->cairo;
double reserved_width =
predict_workspace_buttons_length(cairo, output) +
predict_binding_mode_indicator_length(cairo, output) +
3 * output->scale; // require a bit of space for margin
double predicted_full_pos =
predict_status_line_pos(cairo, output, *x);
if (predicted_full_pos < reserved_width) {
use_short_text = true;
}
wl_list_for_each(block, &output->bar->status->blocks, link) {
uint32_t h = render_status_block(ctx, block, x, edge,
use_short_text);
max_height = h > max_height ? h : max_height;
edge = false;
}
return max_height;
}
static uint32_t render_status_line(struct render_context *ctx, double *x) {
struct status_line *status = ctx->output->bar->status;
switch (status->protocol) {
case PROTOCOL_ERROR:
return render_status_line_error(ctx, x);
case PROTOCOL_TEXT:
return render_status_line_text(ctx, x);
case PROTOCOL_I3BAR:
return render_status_line_i3bar(ctx, x);
case PROTOCOL_UNDEF:
return 0;
}
return 0;
}
static uint32_t render_binding_mode_indicator(struct render_context *ctx,
double x) {
struct swaybar_output *output = ctx->output;
const char *mode = output->bar->mode;
if (!mode) {
return 0;
}
cairo_t *cairo = ctx->cairo;
struct swaybar_config *config = output->bar->config;
int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
output->scale, output->bar->mode_pango_markup,
"%s", mode);
int ws_vertical_padding = WS_VERTICAL_PADDING * output->scale;
int ws_horizontal_padding = WS_HORIZONTAL_PADDING * output->scale;
int border_width = BORDER_WIDTH * output->scale;
uint32_t ideal_height = text_height + ws_vertical_padding * 2
+ border_width * 2;
uint32_t ideal_surface_height = ideal_height / output->scale;
if (!output->bar->config->height &&
output->height < ideal_surface_height) {
return ideal_surface_height;
}
uint32_t width = text_width + ws_horizontal_padding * 2 + border_width * 2;
if (width < config->workspace_min_width * output->scale) {
width = config->workspace_min_width * output->scale;
}
uint32_t height = output->height * output->scale;
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
cairo_set_source_u32(cairo, config->colors.binding_mode.background);
ctx->background_color = config->colors.binding_mode.background;
cairo_rectangle(cairo, x, 0, width, height);
cairo_fill(cairo);
cairo_set_source_u32(cairo, config->colors.binding_mode.border);
cairo_rectangle(cairo, x, 0, width, border_width);
cairo_fill(cairo);
cairo_rectangle(cairo, x, 0, border_width, height);
cairo_fill(cairo);
cairo_rectangle(cairo, x + width - border_width, 0, border_width, height);
cairo_fill(cairo);
cairo_rectangle(cairo, x, height - border_width, width, border_width);
cairo_fill(cairo);
double text_y = height / 2.0 - text_height / 2.0;
cairo_set_source_u32(cairo, config->colors.binding_mode.text);
cairo_move_to(cairo, x + width / 2 - text_width / 2, (int)floor(text_y));
choose_text_aa_mode(ctx, config->colors.binding_mode.text);
pango_printf(cairo, config->font, output->scale,
output->bar->mode_pango_markup, "%s", mode);
return output->height;
}
static enum hotspot_event_handling workspace_hotspot_callback(
struct swaybar_output *output, struct swaybar_hotspot *hotspot,
double x, double y, uint32_t button, void *data) {
if (button != BTN_LEFT) {
return HOTSPOT_PROCESS;
}
ipc_send_workspace_command(output->bar, (const char *)data);
return HOTSPOT_IGNORE;
}
static uint32_t render_workspace_button(struct render_context *ctx,
struct swaybar_workspace *ws, double *x) {
struct swaybar_output *output = ctx->output;
struct swaybar_config *config = output->bar->config;
struct box_colors box_colors;
if (ws->urgent) {
box_colors = config->colors.urgent_workspace;
} else if (ws->focused) {
box_colors = config->colors.focused_workspace;
} else if (ws->visible) {
box_colors = config->colors.active_workspace;
} else {
box_colors = config->colors.inactive_workspace;
}
uint32_t height = output->height * output->scale;
cairo_t *cairo = ctx->cairo;
int text_width, text_height;
get_text_size(cairo, config->font, &text_width, &text_height, NULL,
output->scale, config->pango_markup, "%s", ws->label);
int ws_vertical_padding = WS_VERTICAL_PADDING * output->scale;
int ws_horizontal_padding = WS_HORIZONTAL_PADDING * output->scale;
int border_width = BORDER_WIDTH * output->scale;
uint32_t ideal_height = ws_vertical_padding * 2 + text_height
+ border_width * 2;
uint32_t ideal_surface_height = ideal_height / output->scale;
if (!output->bar->config->height &&
output->height < ideal_surface_height) {
return ideal_surface_height;
}
uint32_t width = text_width + ws_horizontal_padding * 2 + border_width * 2;
if (width < config->workspace_min_width * output->scale) {
width = config->workspace_min_width * output->scale;
}
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
cairo_set_source_u32(cairo, box_colors.background);
ctx->background_color = box_colors.background;
cairo_rectangle(cairo, *x, 0, width, height);
cairo_fill(cairo);
cairo_set_source_u32(cairo, box_colors.border);
cairo_rectangle(cairo, *x, 0, width, border_width);
cairo_fill(cairo);
cairo_rectangle(cairo, *x, 0, border_width, height);
cairo_fill(cairo);
cairo_rectangle(cairo, *x + width - border_width, 0, border_width, height);
cairo_fill(cairo);
cairo_rectangle(cairo, *x, height - border_width, width, border_width);
cairo_fill(cairo);
double text_y = height / 2.0 - text_height / 2.0;
cairo_set_source_u32(cairo, box_colors.text);
cairo_move_to(cairo, *x + width / 2 - text_width / 2, (int)floor(text_y));
choose_text_aa_mode(ctx, box_colors.text);
pango_printf(cairo, config->font, output->scale, config->pango_markup,
"%s", ws->label);
struct swaybar_hotspot *hotspot = calloc(1, sizeof(struct swaybar_hotspot));
hotspot->x = *x;
hotspot->y = 0;
hotspot->width = width;
hotspot->height = height;
hotspot->callback = workspace_hotspot_callback;
hotspot->destroy = free;
hotspot->data = strdup(ws->name);
wl_list_insert(&output->hotspots, &hotspot->link);
*x += width;
return output->height;
}
static uint32_t render_to_cairo(struct render_context *ctx) {
cairo_t *cairo = ctx->cairo;
struct swaybar_output *output = ctx->output;
struct swaybar *bar = output->bar;
struct swaybar_config *config = bar->config;
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
if (output->focused) {
ctx->background_color = config->colors.focused_background;
} else {
ctx->background_color = config->colors.background;
}
cairo_set_source_u32(cairo, ctx->background_color);
cairo_paint(cairo);
int th;
get_text_size(cairo, config->font, NULL, &th, NULL, output->scale, false, "");
uint32_t max_height = (th + WS_VERTICAL_PADDING * 4) / output->scale;
/*
* Each render_* function takes the actual height of the bar, and returns
* the ideal height. If the actual height is too short, the render function
* can do whatever it wants - the buffer won't be committed. If the actual
* height is too tall, the render function should adapt its drawing to
* utilize the available space.
*/
double x = output->width * output->scale;
#if HAVE_TRAY
if (bar->tray) {
uint32_t h = render_tray(cairo, output, &x);
max_height = h > max_height ? h : max_height;
}
#endif
if (bar->status) {
uint32_t h = render_status_line(ctx, &x);
max_height = h > max_height ? h : max_height;
}
x = 0;
if (config->workspace_buttons) {
struct swaybar_workspace *ws;
wl_list_for_each(ws, &output->workspaces, link) {
uint32_t h = render_workspace_button(ctx, ws, &x);
max_height = h > max_height ? h : max_height;
}
}
if (config->binding_mode_indicator) {
uint32_t h = render_binding_mode_indicator(ctx, x);
max_height = h > max_height ? h : max_height;
}
return max_height > output->height ? max_height : output->height;
}
static void output_frame_handle_done(void *data, struct wl_callback *callback,
uint32_t time) {
wl_callback_destroy(callback);
struct swaybar_output *output = data;
output->frame_scheduled = false;
if (output->dirty) {
render_frame(output);
output->dirty = false;
}
}
static const struct wl_callback_listener output_frame_listener = {
.done = output_frame_handle_done
};
void render_frame(struct swaybar_output *output) {
assert(output->surface != NULL);
if (!output->layer_surface) {
return;
}
free_hotspots(&output->hotspots);
struct render_context ctx = { 0 };
ctx.output = output;
cairo_surface_t *recorder = cairo_recording_surface_create(
CAIRO_CONTENT_COLOR_ALPHA, NULL);
cairo_t *cairo = cairo_create(recorder);
cairo_set_antialias(cairo, CAIRO_ANTIALIAS_BEST);
ctx.cairo = cairo;
cairo_font_options_t *fo = cairo_font_options_create();
cairo_font_options_set_hint_style(fo, CAIRO_HINT_STYLE_FULL);
cairo_font_options_set_antialias(fo, CAIRO_ANTIALIAS_GRAY);
ctx.textaa_safe = fo;
if (output->subpixel == WL_OUTPUT_SUBPIXEL_NONE) {
ctx.textaa_sharp = ctx.textaa_safe;
} else {
fo = cairo_font_options_create();
cairo_font_options_set_hint_style(fo, CAIRO_HINT_STYLE_FULL);
cairo_font_options_set_antialias(fo, CAIRO_ANTIALIAS_SUBPIXEL);
cairo_font_options_set_subpixel_order(fo,
to_cairo_subpixel_order(output->subpixel));
ctx.textaa_sharp = fo;
}
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_CLEAR);
cairo_paint(cairo);
cairo_restore(cairo);
uint32_t height = render_to_cairo(&ctx);
int config_height = output->bar->config->height;
if (config_height > 0) {
height = config_height;
}
if (height != output->height || output->width == 0) {
// Reconfigure surface
zwlr_layer_surface_v1_set_size(output->layer_surface, 0, height);
zwlr_layer_surface_v1_set_margin(output->layer_surface,
output->bar->config->gaps.top,
output->bar->config->gaps.right,
output->bar->config->gaps.bottom,
output->bar->config->gaps.left);
if (strcmp(output->bar->config->mode, "dock") == 0) {
zwlr_layer_surface_v1_set_exclusive_zone(output->layer_surface, height);
}
// TODO: this could infinite loop if the compositor assigns us a
// different height than what we asked for
wl_surface_commit(output->surface);
} else if (height > 0) {
// Replay recording into shm and send it off
output->current_buffer = get_next_buffer(output->bar->shm,
output->buffers,
output->width * output->scale,
output->height * output->scale);
if (!output->current_buffer) {
cairo_surface_destroy(recorder);
cairo_destroy(cairo);
return;
}
cairo_t *shm = output->current_buffer->cairo;
cairo_save(shm);
cairo_set_operator(shm, CAIRO_OPERATOR_CLEAR);
cairo_paint(shm);
cairo_restore(shm);
cairo_set_source_surface(shm, recorder, 0.0, 0.0);
cairo_paint(shm);
wl_surface_set_buffer_scale(output->surface, output->scale);
wl_surface_attach(output->surface,
output->current_buffer->buffer, 0, 0);
wl_surface_damage(output->surface, 0, 0,
output->width, output->height);
struct wl_callback *frame_callback = wl_surface_frame(output->surface);
wl_callback_add_listener(frame_callback, &output_frame_listener, output);
output->frame_scheduled = true;
wl_surface_commit(output->surface);
}
if (ctx.textaa_sharp != ctx.textaa_safe) {
cairo_font_options_destroy(ctx.textaa_sharp);
}
cairo_font_options_destroy(ctx.textaa_safe);
cairo_surface_destroy(recorder);
cairo_destroy(cairo);
}