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#include <math.h>
#include <stdlib.h>
#include <wayland-client.h>
#include "cairo.h"
#include "background-image.h"
#include "swaylock/swaylock.h"
#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);
}
}
}
void render_frame(struct swaylock_surface *surface) {
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
}
surface->current_buffer = get_next_buffer(state->shm,
surface->buffers, buffer_width, buffer_height);
if (surface->current_buffer == NULL) {
return;
}
cairo_t *cairo = surface->current_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);
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
if (state->args.mode == BACKGROUND_MODE_SOLID_COLOR || !surface->image) {
cairo_set_source_u32(cairo, state->args.colors.background);
cairo_paint(cairo);
} else {
render_background_image(cairo, surface->image,
state->args.mode, buffer_width, buffer_height);
}
cairo_restore(cairo);
cairo_identity_matrix(cairo);
int arc_radius = state->args.radius * surface->scale;
int arc_thickness = state->args.thickness * surface->scale;
float type_indicator_border_thickness =
TYPE_INDICATOR_BORDER_THICKNESS * surface->scale;
if (state->args.show_indicator && state->auth_state != AUTH_STATE_IDLE) {
// Draw circle
cairo_set_line_width(cairo, arc_thickness);
cairo_arc(cairo, buffer_width / 2, buffer_height / 2, arc_radius,
0, 2 * M_PI);
set_color_for_state(cairo, state, &state->args.colors.inside);
cairo_fill_preserve(cairo);
set_color_for_state(cairo, state, &state->args.colors.ring);
cairo_stroke(cairo);
// Draw a message
char *text = NULL;
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);
cairo_set_font_size(cairo, arc_radius / 3.0f);
switch (state->auth_state) {
case AUTH_STATE_VALIDATING:
text = "verifying";
break;
case AUTH_STATE_INVALID:
text = "wrong";
break;
case AUTH_STATE_CLEAR:
text = "cleared";
break;
case AUTH_STATE_INPUT:
case AUTH_STATE_INPUT_NOP:
case AUTH_STATE_BACKSPACE:
if (state->xkb.caps_lock && state->args.show_caps_lock_text) {
text = "Caps Lock";
}
break;
default:
break;
}
if (text) {
cairo_text_extents_t extents;
double x, y;
cairo_text_extents(cairo, text, &extents);
x = (buffer_width / 2) -
(extents.width / 2 + extents.x_bearing);
y = (buffer_height / 2) -
(extents.height / 2 + extents.y_bearing);
cairo_move_to(cairo, x, y);
cairo_show_text(cairo, text);
cairo_close_path(cairo);
cairo_new_sub_path(cairo);
}
// 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;
highlight_start +=
(rand() % (int)(M_PI * 100)) / 100.0 + M_PI * 0.5;
cairo_arc(cairo, buffer_width / 2, buffer_height / 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_height / 2,
arc_radius, highlight_start,
highlight_start + type_indicator_border_thickness);
cairo_stroke(cairo);
cairo_arc(cairo, buffer_width / 2, buffer_height / 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_height / 2,
arc_radius - arc_thickness / 2, 0, 2 * M_PI);
cairo_stroke(cairo);
cairo_arc(cairo, buffer_width / 2, buffer_height / 2,
arc_radius + arc_thickness / 2, 0, 2 * M_PI);
cairo_stroke(cairo);
}
wl_surface_set_buffer_scale(surface->surface, surface->scale);
wl_surface_attach(surface->surface, surface->current_buffer->buffer, 0, 0);
wl_surface_damage(surface->surface, 0, 0, surface->width, surface->height);
wl_surface_commit(surface->surface);
}
void render_frames(struct swaylock_state *state) {
struct swaylock_surface *surface;
wl_list_for_each(surface, &state->surfaces, link) {
render_frame(surface);
}
}
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