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render.c
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render.c
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#include <math.h>
#include <stdlib.h>
#include <time.h>
#include <locale.h>
#include <wayland-client.h>
#include "cairo.h"
#include "background-image.h"
#include "swaylock.h"
// glib might or might not have already defined MIN,
// depending on whether we have pixbuf or not...
#ifndef MIN
#define MIN(a, b) ((a) < (b) ? (a) : (b))
#endif
#define M_PI 3.14159265358979323846
const float TYPE_INDICATOR_RANGE = M_PI / 3.0f;
const float TYPE_INDICATOR_BORDER_THICKNESS = M_PI / 128.0f;
static void set_color_for_state(cairo_t *cairo, struct swaylock_state *state,
struct swaylock_colorset *colorset) {
if (state->auth_state == AUTH_STATE_VALIDATING) {
cairo_set_source_u32(cairo, colorset->verifying);
} else if (state->auth_state == AUTH_STATE_INVALID) {
cairo_set_source_u32(cairo, colorset->wrong);
} else if (state->auth_state == AUTH_STATE_CLEAR) {
cairo_set_source_u32(cairo, colorset->cleared);
} else {
if (state->xkb.caps_lock && state->args.show_caps_lock_indicator) {
cairo_set_source_u32(cairo, colorset->caps_lock);
} else if (state->xkb.caps_lock && !state->args.show_caps_lock_indicator &&
state->args.show_caps_lock_text) {
uint32_t inputtextcolor = state->args.colors.text.input;
state->args.colors.text.input = state->args.colors.text.caps_lock;
cairo_set_source_u32(cairo, colorset->input);
state->args.colors.text.input = inputtextcolor;
} else {
cairo_set_source_u32(cairo, colorset->input);
}
}
}
static void timetext(struct swaylock_surface *surface, char **tstr, char **dstr) {
static char dbuf[256];
static char tbuf[256];
// Use user's locale for strftime calls
char *prevloc = setlocale(LC_TIME, NULL);
setlocale(LC_TIME, "");
time_t t = time(NULL);
struct tm *tm = localtime(&t);
if (surface->state->args.timestr[0]) {
strftime(tbuf, sizeof(tbuf), surface->state->args.timestr, tm);
*tstr = tbuf;
} else {
*tstr = NULL;
}
if (surface->state->args.datestr[0]) {
strftime(dbuf, sizeof(dbuf), surface->state->args.datestr, tm);
*dstr = dbuf;
} else {
*dstr = NULL;
}
// Set it back, so we don't break stuff
setlocale(LC_TIME, prevloc);
}
void render_frame_background(struct swaylock_surface *surface, bool commit) {
struct swaylock_state *state = surface->state;
int buffer_width = surface->width * surface->scale;
int buffer_height = surface->height * surface->scale;
if (buffer_width == 0 || buffer_height == 0) {
return; // not yet configured
}
struct pool_buffer *buffer = get_next_buffer(state->shm,
surface->buffers, buffer_width, buffer_height);
if (buffer == NULL) {
return;
}
cairo_t *cairo = buffer->cairo;
cairo_set_antialias(cairo, CAIRO_ANTIALIAS_BEST);
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
cairo_set_source_u32(cairo, state->args.colors.background);
cairo_pattern_set_filter(cairo_get_source(cairo), CAIRO_FILTER_BILINEAR);
cairo_paint(cairo);
if (surface->image && state->args.mode != BACKGROUND_MODE_SOLID_COLOR) {
cairo_set_operator(cairo, CAIRO_OPERATOR_OVER);
if (fade_is_complete(&surface->fade)) {
if (!surface->scaled_image) {
surface->scaled_image =
scale_background_image(surface->image, state->args.mode,
buffer_width, buffer_height);
}
render_background_image(cairo, surface->scaled_image, 1);
} else {
if (!surface->screencopy.scaled_image) {
surface->screencopy.scaled_image =
scale_background_image(surface->screencopy.original_image,
state->args.mode, buffer_width, buffer_height);
}
render_background_image(cairo, surface->screencopy.scaled_image, 1);
if (!surface->scaled_image) {
surface->scaled_image =
scale_background_image(surface->image, state->args.mode,
buffer_width, buffer_height);
}
render_background_image(cairo, surface->scaled_image, surface->fade.alpha);
}
}
cairo_restore(cairo);
cairo_identity_matrix(cairo);
wl_surface_set_buffer_scale(surface->surface, surface->scale);
wl_surface_attach(surface->surface, buffer->buffer, 0, 0);
wl_surface_damage_buffer(surface->surface, 0, 0, INT32_MAX, INT32_MAX);
if (commit) {
wl_surface_commit(surface->surface);
}
}
void render_background_fade(struct swaylock_surface *surface, uint32_t time) {
if (fade_is_complete(&surface->fade)) {
return;
}
fade_update(&surface->fade, time);
render_frame_background(surface, true);
render_frame(surface);
}
void render_frame(struct swaylock_surface *surface) {
struct swaylock_state *state = surface->state;
int arc_radius = state->args.radius * surface->scale;
int arc_thickness = state->args.thickness * surface->scale;
int buffer_diameter = (arc_radius + arc_thickness) * 2;
int buffer_width = surface->indicator_width;
int buffer_height = surface->indicator_height;
int new_width = buffer_diameter;
int new_height = buffer_diameter;
int subsurf_xpos;
int subsurf_ypos;
// Center the indicator unless overridden by the user
if (state->args.override_indicator_x_position) {
subsurf_xpos = state->args.indicator_x_position -
buffer_width / (2 * surface->scale) + 2 / surface->scale;
} else {
subsurf_xpos = surface->width / 2 -
buffer_width / (2 * surface->scale) + 2 / surface->scale;
}
if (state->args.override_indicator_y_position) {
subsurf_ypos = state->args.indicator_y_position -
(state->args.radius + state->args.thickness);
} else {
subsurf_ypos = surface->height / 2 -
(state->args.radius + state->args.thickness);
}
wl_subsurface_set_position(surface->subsurface, subsurf_xpos, subsurf_ypos);
struct pool_buffer *buffer = get_next_buffer(state->shm,
surface->indicator_buffers, buffer_width, buffer_height);
if (buffer == NULL) {
return;
}
cairo_t *cairo = buffer->cairo;
cairo_set_antialias(cairo, CAIRO_ANTIALIAS_BEST);
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_SUBPIXEL);
cairo_font_options_set_subpixel_order(fo, to_cairo_subpixel_order(surface->subpixel));
cairo_set_font_options(cairo, fo);
cairo_font_options_destroy(fo);
cairo_identity_matrix(cairo);
// Clear
cairo_save(cairo);
cairo_set_source_rgba(cairo, 0, 0, 0, 0);
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
cairo_paint(cairo);
cairo_restore(cairo);
float type_indicator_border_thickness =
TYPE_INDICATOR_BORDER_THICKNESS * surface->scale;
// This is a bit messy.
// After the fork, upstream added their own --indicator-idle-visible option,
// but it works slightly differently from swaylock-effects' --indicator
// option. To maintain compatibility with upstream swaylock scripts as well
// as with old swaylock-effects scripts, I will keep both flags.
bool upstream_show_indicator =
state->args.show_indicator && (state->auth_state != AUTH_STATE_IDLE ||
state->args.indicator_idle_visible);
if (state->args.indicator ||
(upstream_show_indicator && state->auth_state != AUTH_STATE_GRACE)) {
// Draw indicator image
cairo_surface_t *image = state->indicator_image;
if (image) {
int height = cairo_image_surface_get_height(image);
int width = cairo_image_surface_get_width(image);
int smallest = MIN(height, width);
double radius = arc_radius - arc_thickness * 0.5;
double scale = radius * 2 / smallest;
double offset = buffer_diameter * 0.5 / scale - smallest * 0.5;
// Create the arc that clips the image
cairo_arc(cairo,
buffer_diameter * 0.5,
buffer_diameter * 0.5,
radius,
0, 2 * M_PI);
// Scale cairo to make image fit the indicator
cairo_scale(cairo, scale, scale);
cairo_set_source_surface(cairo, image, offset, offset);
// Scale cairo back
cairo_scale(cairo, 1 / scale, 1 / scale);
cairo_fill(cairo);
}
// Fill inner circle
cairo_set_line_width(cairo, 0);
cairo_arc(cairo, buffer_width / 2, buffer_diameter / 2,
arc_radius - arc_thickness / 2, 0, 2 * M_PI);
set_color_for_state(cairo, state, &state->args.colors.inside);
cairo_fill_preserve(cairo);
cairo_stroke(cairo);
// Draw ring
cairo_set_line_width(cairo, arc_thickness);
cairo_arc(cairo, buffer_width / 2, buffer_diameter / 2, arc_radius,
0, 2 * M_PI);
set_color_for_state(cairo, state, &state->args.colors.ring);
cairo_stroke(cairo);
// Draw a message
char *text = NULL;
char *text_l1 = NULL;
char *text_l2 = NULL;
const char *layout_text = NULL;
double font_size;
char attempts[4]; // like i3lock: count no more than 999
set_color_for_state(cairo, state, &state->args.colors.text);
cairo_select_font_face(cairo, state->args.font,
CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_NORMAL);
if (state->args.font_size > 0) {
font_size = state->args.font_size;
} else {
font_size = arc_radius / 3.0f;
}
cairo_set_font_size(cairo, font_size);
switch (state->auth_state) {
case AUTH_STATE_VALIDATING:
text = state->args.text_verifying;
break;
case AUTH_STATE_INVALID:
text = state->args.text_wrong;
break;
case AUTH_STATE_CLEAR:
text = state->args.text_cleared;
break;
case AUTH_STATE_INPUT:
case AUTH_STATE_INPUT_NOP:
case AUTH_STATE_BACKSPACE:
// Caps Lock has higher priority
if (state->xkb.caps_lock && state->args.show_caps_lock_text) {
text = state->args.text_caps_lock;
} else if (state->args.show_failed_attempts &&
state->failed_attempts > 0) {
if (state->failed_attempts > 999) {
text = "999+";
} else {
snprintf(attempts, sizeof(attempts), "%d", state->failed_attempts);
text = attempts;
}
} else if (state->args.clock) {
timetext(surface, &text_l1, &text_l2);
}
xkb_layout_index_t num_layout = xkb_keymap_num_layouts(state->xkb.keymap);
if (!state->args.hide_keyboard_layout &&
(state->args.show_keyboard_layout || num_layout > 1)) {
xkb_layout_index_t curr_layout = 0;
// advance to the first active layout (if any)
while (curr_layout < num_layout &&
xkb_state_layout_index_is_active(state->xkb.state,
curr_layout, XKB_STATE_LAYOUT_EFFECTIVE) != 1) {
++curr_layout;
}
// will handle invalid index if none are active
layout_text = xkb_keymap_layout_get_name(state->xkb.keymap, curr_layout);
}
break;
default:
if (state->args.clock)
timetext(surface, &text_l1, &text_l2);
break;
}
if (text_l1 && !text_l2)
text = text_l1;
if (text_l2 && !text_l1)
text = text_l2;
if (text) {
cairo_text_extents_t extents;
cairo_font_extents_t fe;
double x, y;
cairo_text_extents(cairo, text, &extents);
cairo_font_extents(cairo, &fe);
x = (buffer_width / 2) -
(extents.width / 2 + extents.x_bearing);
y = (buffer_diameter / 2) +
(fe.height / 2 - fe.descent);
cairo_move_to(cairo, x, y);
cairo_show_text(cairo, text);
cairo_close_path(cairo);
cairo_new_sub_path(cairo);
if (new_width < extents.width) {
new_width = extents.width;
}
} else if (text_l1 && text_l2) {
cairo_text_extents_t extents_l1, extents_l2;
cairo_font_extents_t fe_l1, fe_l2;
double x_l1, y_l1, x_l2, y_l2;
/* Top */
cairo_text_extents(cairo, text_l1, &extents_l1);
cairo_font_extents(cairo, &fe_l1);
x_l1 = (buffer_width / 2) -
(extents_l1.width / 2 + extents_l1.x_bearing);
y_l1 = (buffer_diameter / 2) +
(fe_l1.height / 2 - fe_l1.descent) - arc_radius / 10.0f;
cairo_move_to(cairo, x_l1, y_l1);
cairo_show_text(cairo, text_l1);
cairo_close_path(cairo);
cairo_new_sub_path(cairo);
/* Bottom */
cairo_set_font_size(cairo, arc_radius / 6.0f);
cairo_text_extents(cairo, text_l2, &extents_l2);
cairo_font_extents(cairo, &fe_l2);
x_l2 = (buffer_width / 2) -
(extents_l2.width / 2 + extents_l2.x_bearing);
y_l2 = (buffer_diameter / 2) +
(fe_l2.height / 2 - fe_l2.descent) + arc_radius / 3.5f;
cairo_move_to(cairo, x_l2, y_l2);
cairo_show_text(cairo, text_l2);
cairo_close_path(cairo);
cairo_new_sub_path(cairo);
if (new_width < extents_l1.width)
new_width = extents_l1.width;
if (new_width < extents_l2.width)
new_width = extents_l2.width;
cairo_set_font_size(cairo, font_size);
}
// Typing indicator: Highlight random part on keypress
if (state->auth_state == AUTH_STATE_INPUT
|| state->auth_state == AUTH_STATE_BACKSPACE) {
static double highlight_start = 0;
if (state->indicator_dirty) {
highlight_start +=
(rand() % (int)(M_PI * 100)) / 100.0 + M_PI * 0.5;
state->indicator_dirty = false;
}
cairo_arc(cairo, buffer_width / 2, buffer_diameter / 2,
arc_radius, highlight_start,
highlight_start + TYPE_INDICATOR_RANGE);
if (state->auth_state == AUTH_STATE_INPUT) {
if (state->xkb.caps_lock && state->args.show_caps_lock_indicator) {
cairo_set_source_u32(cairo, state->args.colors.caps_lock_key_highlight);
} else {
cairo_set_source_u32(cairo, state->args.colors.key_highlight);
}
} else {
if (state->xkb.caps_lock && state->args.show_caps_lock_indicator) {
cairo_set_source_u32(cairo, state->args.colors.caps_lock_bs_highlight);
} else {
cairo_set_source_u32(cairo, state->args.colors.bs_highlight);
}
}
cairo_stroke(cairo);
// Draw borders
cairo_set_source_u32(cairo, state->args.colors.separator);
cairo_arc(cairo, buffer_width / 2, buffer_diameter / 2,
arc_radius, highlight_start,
highlight_start + type_indicator_border_thickness);
cairo_stroke(cairo);
cairo_arc(cairo, buffer_width / 2, buffer_diameter / 2,
arc_radius, highlight_start + TYPE_INDICATOR_RANGE,
highlight_start + TYPE_INDICATOR_RANGE +
type_indicator_border_thickness);
cairo_stroke(cairo);
}
// Draw inner + outer border of the circle
set_color_for_state(cairo, state, &state->args.colors.line);
cairo_set_line_width(cairo, 2.0 * surface->scale);
cairo_arc(cairo, buffer_width / 2, buffer_diameter / 2,
arc_radius - arc_thickness / 2, 0, 2 * M_PI);
cairo_stroke(cairo);
cairo_arc(cairo, buffer_width / 2, buffer_diameter / 2,
arc_radius + arc_thickness / 2, 0, 2 * M_PI);
cairo_stroke(cairo);
// display layout text separately
if (layout_text) {
cairo_text_extents_t extents;
cairo_font_extents_t fe;
double x, y;
double box_padding = 4.0 * surface->scale;
cairo_text_extents(cairo, layout_text, &extents);
cairo_font_extents(cairo, &fe);
// upper left coordinates for box
x = (buffer_width / 2) - (extents.width / 2) - box_padding;
y = buffer_diameter;
// background box
cairo_rectangle(cairo, x, y,
extents.width + 2.0 * box_padding,
fe.height + 2.0 * box_padding);
cairo_set_source_u32(cairo, state->args.colors.layout_background);
cairo_fill_preserve(cairo);
// border
cairo_set_source_u32(cairo, state->args.colors.layout_border);
cairo_stroke(cairo);
// take font extents and padding into account
cairo_move_to(cairo,
x - extents.x_bearing + box_padding,
y + (fe.height - fe.descent) + box_padding);
cairo_set_source_u32(cairo, state->args.colors.layout_text);
cairo_show_text(cairo, layout_text);
cairo_new_sub_path(cairo);
new_height += fe.height + 2 * box_padding;
if (new_width < extents.width + 2 * box_padding) {
new_width = extents.width + 2 * box_padding;
}
}
}
// Ensure buffer size is multiple of buffer scale - required by protocol
new_height += surface->scale - (new_height % surface->scale);
new_width += surface->scale - (new_width % surface->scale);
if (buffer_width != new_width || buffer_height != new_height) {
destroy_buffer(buffer);
surface->indicator_width = new_width;
surface->indicator_height = new_height;
render_frame(surface);
return;
}
wl_surface_set_buffer_scale(surface->child, surface->scale);
wl_surface_attach(surface->child, buffer->buffer, 0, 0);
wl_surface_damage_buffer(surface->child, 0, 0, INT32_MAX, INT32_MAX);
wl_surface_commit(surface->child);
wl_surface_commit(surface->surface);
}