10ab8b2740
The size of the surface used to draw the indicator depends on the extents of the text being drawn on and under the indicator. This commit refactors the `render_frame` function so that the surface size is computed before drawing; before, `render_frame` drew onto a buffer, estimated the size the buffer should have had, and recursively called itself to try again with the estimated size, if necessary. This was done because Cairo's methods to estimate font and text size require that a cairo_t context object and an associated cairo_surface already have been set up. Since the surface size depends on the text size, the natural way to use Cairo would have a circular dependency. In order to compute sizes _before_ the buffer is created, this commit adds a 1x1 surface and a matching `test_cairo` context which is set to the same font and drawing parameters as the buffer that will be created. Font/text extent measurements should give the same results as for the final buffer.
141 lines
3.7 KiB
C
141 lines
3.7 KiB
C
#ifndef _SWAYLOCK_H
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#define _SWAYLOCK_H
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#include <stdbool.h>
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#include <stdint.h>
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#include <wayland-client.h>
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#include "background-image.h"
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#include "cairo.h"
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#include "pool-buffer.h"
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#include "seat.h"
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#include "wlr-layer-shell-unstable-v1-client-protocol.h"
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enum auth_state {
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AUTH_STATE_IDLE,
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AUTH_STATE_CLEAR,
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AUTH_STATE_INPUT,
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AUTH_STATE_INPUT_NOP,
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AUTH_STATE_BACKSPACE,
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AUTH_STATE_VALIDATING,
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AUTH_STATE_INVALID,
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};
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struct swaylock_colorset {
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uint32_t input;
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uint32_t cleared;
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uint32_t caps_lock;
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uint32_t verifying;
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uint32_t wrong;
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};
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struct swaylock_colors {
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uint32_t background;
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uint32_t bs_highlight;
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uint32_t key_highlight;
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uint32_t caps_lock_bs_highlight;
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uint32_t caps_lock_key_highlight;
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uint32_t separator;
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uint32_t layout_background;
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uint32_t layout_border;
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uint32_t layout_text;
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struct swaylock_colorset inside;
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struct swaylock_colorset line;
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struct swaylock_colorset ring;
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struct swaylock_colorset text;
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};
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struct swaylock_args {
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struct swaylock_colors colors;
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enum background_mode mode;
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char *font;
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uint32_t font_size;
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uint32_t radius;
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uint32_t thickness;
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uint32_t indicator_x_position;
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uint32_t indicator_y_position;
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bool override_indicator_x_position;
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bool override_indicator_y_position;
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bool ignore_empty;
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bool show_indicator;
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bool show_caps_lock_text;
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bool show_caps_lock_indicator;
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bool show_keyboard_layout;
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bool hide_keyboard_layout;
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bool show_failed_attempts;
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bool daemonize;
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bool indicator_idle_visible;
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};
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struct swaylock_password {
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size_t len;
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size_t buffer_len;
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char *buffer;
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};
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struct swaylock_state {
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struct loop *eventloop;
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struct loop_timer *clear_indicator_timer; // clears the indicator
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struct loop_timer *clear_password_timer; // clears the password buffer
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struct wl_display *display;
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struct wl_compositor *compositor;
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struct wl_subcompositor *subcompositor;
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struct zwlr_layer_shell_v1 *layer_shell;
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struct zwlr_input_inhibit_manager_v1 *input_inhibit_manager;
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struct wl_shm *shm;
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struct wl_list surfaces;
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struct wl_list images;
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struct swaylock_args args;
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struct swaylock_password password;
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struct swaylock_xkb xkb;
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cairo_surface_t *test_surface;
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cairo_t *test_cairo; // used to estimate font/text sizes
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enum auth_state auth_state;
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int failed_attempts;
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bool run_display;
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struct ext_session_lock_manager_v1 *ext_session_lock_manager_v1;
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struct ext_session_lock_v1 *ext_session_lock_v1;
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};
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struct swaylock_surface {
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cairo_surface_t *image;
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struct swaylock_state *state;
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struct wl_output *output;
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uint32_t output_global_name;
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struct wl_surface *surface;
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struct wl_surface *child; // surface made into subsurface
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struct wl_subsurface *subsurface;
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struct zwlr_layer_surface_v1 *layer_surface;
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struct ext_session_lock_surface_v1 *ext_session_lock_surface_v1;
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struct pool_buffer buffers[2];
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struct pool_buffer indicator_buffers[2];
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bool frame_pending, dirty;
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uint32_t width, height;
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uint32_t indicator_width, indicator_height;
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int32_t scale;
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enum wl_output_subpixel subpixel;
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char *output_name;
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struct wl_list link;
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};
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// There is exactly one swaylock_image for each -i argument
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struct swaylock_image {
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char *path;
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char *output_name;
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cairo_surface_t *cairo_surface;
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struct wl_list link;
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};
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void swaylock_handle_key(struct swaylock_state *state,
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xkb_keysym_t keysym, uint32_t codepoint);
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void render_frame_background(struct swaylock_surface *surface);
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void render_frame(struct swaylock_surface *surface);
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void damage_surface(struct swaylock_surface *surface);
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void damage_state(struct swaylock_state *state);
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void clear_password_buffer(struct swaylock_password *pw);
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void schedule_indicator_clear(struct swaylock_state *state);
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void initialize_pw_backend(int argc, char **argv);
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void run_pw_backend_child(void);
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void clear_buffer(char *buf, size_t size);
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#endif
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