2 * vim:ts=4:sw=4:expandtab
4 * © 2010-2014 Michael Stapelberg
6 * See LICENSE for licensing information
16 #include <cairo/cairo-xcb.h>
20 #include "unlock_indicator.h"
23 #define BUTTON_RADIUS 90
24 #define BUTTON_SPACE (BUTTON_RADIUS + 5)
25 #define BUTTON_CENTER (BUTTON_RADIUS + 5)
26 #define BUTTON_DIAMETER (2 * BUTTON_SPACE)
28 /*******************************************************************************
29 * Variables defined in i3lock.c.
30 ******************************************************************************/
32 extern bool debug_mode;
34 /* The current position in the input buffer. Useful to determine if any
35 * characters of the password have already been entered or not. */
38 /* The lock window. */
39 extern xcb_window_t win;
41 /* The current resolution of the X11 root window. */
42 extern uint32_t last_resolution[2];
44 /* Whether the unlock indicator is enabled (defaults to true). */
45 extern bool unlock_indicator;
47 /* A Cairo surface containing the specified image (-i), if any. */
48 extern cairo_surface_t *img;
50 /* Whether the image should be tiled. */
52 /* The background color to use (in hex). */
55 /*******************************************************************************
56 * Variables defined in xcb.c.
57 ******************************************************************************/
59 /* The root screen, to determine the DPI. */
60 extern xcb_screen_t *screen;
62 /*******************************************************************************
64 ******************************************************************************/
66 /* Cache the screen’s visual, necessary for creating a Cairo context. */
67 static xcb_visualtype_t *vistype;
69 /* Maintain the current unlock/PAM state to draw the appropriate unlock
71 unlock_state_t unlock_state;
72 pam_state_t pam_state;
75 * Returns the scaling factor of the current screen. E.g., on a 227 DPI MacBook
76 * Pro 13" Retina screen, the scaling factor is 227/96 = 2.36.
79 static double scaling_factor(void) {
80 const int dpi = (double)screen->height_in_pixels * 25.4 /
81 (double)screen->height_in_millimeters;
86 * Draws global image with fill color onto a pixmap with the given
87 * resolution and returns it.
90 xcb_pixmap_t draw_image(uint32_t *resolution) {
91 xcb_pixmap_t bg_pixmap = XCB_NONE;
92 int button_diameter_physical = ceil(scaling_factor() * BUTTON_DIAMETER);
93 DEBUG("scaling_factor is %.f, physical diameter is %d px\n",
94 scaling_factor(), button_diameter_physical);
97 vistype = get_root_visual_type(screen);
98 bg_pixmap = create_bg_pixmap(conn, screen, resolution, color);
99 /* Initialize cairo: Create one in-memory surface to render the unlock
100 * indicator on, create one XCB surface to actually draw (one or more,
101 * depending on the amount of screens) unlock indicators on. */
102 cairo_surface_t *output = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, button_diameter_physical, button_diameter_physical);
103 cairo_t *ctx = cairo_create(output);
105 cairo_surface_t *xcb_output = cairo_xcb_surface_create(conn, bg_pixmap, vistype, resolution[0], resolution[1]);
106 cairo_t *xcb_ctx = cairo_create(xcb_output);
110 cairo_set_source_surface(xcb_ctx, img, 0, 0);
111 cairo_paint(xcb_ctx);
113 /* create a pattern and fill a rectangle as big as the screen */
114 cairo_pattern_t *pattern;
115 pattern = cairo_pattern_create_for_surface(img);
116 cairo_set_source(xcb_ctx, pattern);
117 cairo_pattern_set_extend(pattern, CAIRO_EXTEND_REPEAT);
118 cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
120 cairo_pattern_destroy(pattern);
123 char strgroups[3][3] = {{color[0], color[1], '\0'},
124 {color[2], color[3], '\0'},
125 {color[4], color[5], '\0'}};
126 uint32_t rgb16[3] = {(strtol(strgroups[0], NULL, 16)),
127 (strtol(strgroups[1], NULL, 16)),
128 (strtol(strgroups[2], NULL, 16))};
129 cairo_set_source_rgb(xcb_ctx, rgb16[0] / 255.0, rgb16[1] / 255.0, rgb16[2] / 255.0);
130 cairo_rectangle(xcb_ctx, 0, 0, resolution[0], resolution[1]);
134 if (unlock_state >= STATE_KEY_PRESSED && unlock_indicator) {
135 cairo_scale(ctx, scaling_factor(), scaling_factor());
136 /* Draw a (centered) circle with transparent background. */
137 cairo_set_line_width(ctx, 10.0);
139 BUTTON_CENTER /* x */,
140 BUTTON_CENTER /* y */,
141 BUTTON_RADIUS /* radius */,
145 /* Use the appropriate color for the different PAM states
146 * (currently verifying, wrong password, or default) */
148 case STATE_PAM_VERIFY:
149 cairo_set_source_rgba(ctx, 0, 114.0/255, 255.0/255, 0.75);
151 case STATE_PAM_WRONG:
152 cairo_set_source_rgba(ctx, 250.0/255, 0, 0, 0.75);
155 cairo_set_source_rgba(ctx, 0, 0, 0, 0.75);
158 cairo_fill_preserve(ctx);
161 case STATE_PAM_VERIFY:
162 cairo_set_source_rgb(ctx, 51.0/255, 0, 250.0/255);
164 case STATE_PAM_WRONG:
165 cairo_set_source_rgb(ctx, 125.0/255, 51.0/255, 0);
168 cairo_set_source_rgb(ctx, 51.0/255, 125.0/255, 0);
173 /* Draw an inner seperator line. */
174 cairo_set_source_rgb(ctx, 0, 0, 0);
175 cairo_set_line_width(ctx, 2.0);
177 BUTTON_CENTER /* x */,
178 BUTTON_CENTER /* y */,
179 BUTTON_RADIUS - 5 /* radius */,
184 cairo_set_line_width(ctx, 10.0);
186 /* Display a (centered) text of the current PAM state. */
189 case STATE_PAM_VERIFY:
192 case STATE_PAM_WRONG:
200 cairo_text_extents_t extents;
203 cairo_set_source_rgb(ctx, 0, 0, 0);
204 cairo_set_font_size(ctx, 28.0);
206 cairo_text_extents(ctx, text, &extents);
207 x = BUTTON_CENTER - ((extents.width / 2) + extents.x_bearing);
208 y = BUTTON_CENTER - ((extents.height / 2) + extents.y_bearing);
210 cairo_move_to(ctx, x, y);
211 cairo_show_text(ctx, text);
212 cairo_close_path(ctx);
215 /* After the user pressed any valid key or the backspace key, we
216 * highlight a random part of the unlock indicator to confirm this
218 if (unlock_state == STATE_KEY_ACTIVE ||
219 unlock_state == STATE_BACKSPACE_ACTIVE) {
220 cairo_new_sub_path(ctx);
221 double highlight_start = (rand() % (int)(2 * M_PI * 100)) / 100.0;
223 BUTTON_CENTER /* x */,
224 BUTTON_CENTER /* y */,
225 BUTTON_RADIUS /* radius */,
227 highlight_start + (M_PI / 3.0));
228 if (unlock_state == STATE_KEY_ACTIVE) {
229 /* For normal keys, we use a lighter green. */
230 cairo_set_source_rgb(ctx, 51.0/255, 219.0/255, 0);
232 /* For backspace, we use red. */
233 cairo_set_source_rgb(ctx, 219.0/255, 51.0/255, 0);
237 /* Draw two little separators for the highlighted part of the
238 * unlock indicator. */
239 cairo_set_source_rgb(ctx, 0, 0, 0);
241 BUTTON_CENTER /* x */,
242 BUTTON_CENTER /* y */,
243 BUTTON_RADIUS /* radius */,
244 highlight_start /* start */,
245 highlight_start + (M_PI / 128.0) /* end */);
248 BUTTON_CENTER /* x */,
249 BUTTON_CENTER /* y */,
250 BUTTON_RADIUS /* radius */,
251 highlight_start + (M_PI / 3.0) /* start */,
252 (highlight_start + (M_PI / 3.0)) + (M_PI / 128.0) /* end */);
257 if (xr_screens > 0) {
258 /* Composite the unlock indicator in the middle of each screen. */
259 for (int screen = 0; screen < xr_screens; screen++) {
260 int x = (xr_resolutions[screen].x + ((xr_resolutions[screen].width / 2) - (button_diameter_physical / 2)));
261 int y = (xr_resolutions[screen].y + ((xr_resolutions[screen].height / 2) - (button_diameter_physical / 2)));
262 cairo_set_source_surface(xcb_ctx, output, x, y);
263 cairo_rectangle(xcb_ctx, x, y, button_diameter_physical, button_diameter_physical);
267 /* We have no information about the screen sizes/positions, so we just
268 * place the unlock indicator in the middle of the X root window and
269 * hope for the best. */
270 int x = (last_resolution[0] / 2) - (button_diameter_physical / 2);
271 int y = (last_resolution[1] / 2) - (button_diameter_physical / 2);
272 cairo_set_source_surface(xcb_ctx, output, x, y);
273 cairo_rectangle(xcb_ctx, x, y, button_diameter_physical, button_diameter_physical);
277 cairo_surface_destroy(xcb_output);
278 cairo_surface_destroy(output);
280 cairo_destroy(xcb_ctx);
285 * Calls draw_image on a new pixmap and swaps that with the current pixmap
288 void redraw_screen(void) {
289 xcb_pixmap_t bg_pixmap = draw_image(last_resolution);
290 xcb_change_window_attributes(conn, win, XCB_CW_BACK_PIXMAP, (uint32_t[1]){ bg_pixmap });
291 /* XXX: Possible optimization: Only update the area in the middle of the
292 * screen instead of the whole screen. */
293 xcb_clear_area(conn, 0, win, 0, 0, last_resolution[0], last_resolution[1]);
294 xcb_free_pixmap(conn, bg_pixmap);
299 * Hides the unlock indicator completely when there is no content in the
303 void clear_indicator(void) {
304 if (input_position == 0) {
305 unlock_state = STATE_STARTED;
306 } else unlock_state = STATE_KEY_PRESSED;