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#define _GNU_SOURCE
#include<stdio.h>
#include<stdlib.h>
#include<stdbool.h>
#include<unistd.h>
#include<string.h>
#include<math.h>
#include<cairo/cairo.h>
#include<wayland-server.h>
#include<wayland-client.h>
#include<wayland-client-protocol.h>
#include"wlclock.h"
#include"surface.h"
#include"output.h"
#include"misc.h"
#include"colour.h"
#include"render.h"
#define PI 3.141592653589793238462643383279502884
static void rounded_rectangle (cairo_t *cairo, uint32_t x, uint32_t y, uint32_t w, uint32_t h,
double tl_r, double tr_r, double bl_r, double br_r)
{
double degrees = PI / 180.0;
cairo_new_sub_path(cairo);
cairo_arc(cairo, x + w - tr_r, y + tr_r, tr_r, -90 * degrees, 0 * degrees);
cairo_arc(cairo, x + w - br_r, y + h - br_r, br_r, 0 * degrees, 90 * degrees);
cairo_arc(cairo, x + bl_r, y + h - bl_r, bl_r, 90 * degrees, 180 * degrees);
cairo_arc(cairo, x + tl_r, y + tl_r, tl_r, 180 * degrees, 270 * degrees);
cairo_close_path(cairo);
}
static void draw_background (cairo_t *cairo, struct Wlclock_dimensions *dimensions, int32_t scale)
{
if ( colour_is_transparent(&context.background_colour)
&& colour_is_transparent(&context.border_colour) )
return;
int32_t w = scale * dimensions->w;
int32_t h = scale * dimensions->h;
int32_t center_x = scale * dimensions->center_x;
int32_t center_y = scale * dimensions->center_y;
int32_t center_size = scale * dimensions->center_size;
int32_t radius_top_left = scale * context.radius_top_left;
int32_t radius_top_right = scale * context.radius_top_right;
int32_t radius_bottom_left = scale * context.radius_bottom_left;
int32_t radius_bottom_right = scale * context.radius_bottom_right;
/* Avoid too radii so big that they cause unexpected drawing behaviour. */
if ( radius_top_left > center_size / 2 )
radius_top_left = center_size / 2;
if ( radius_top_right > center_size / 2 )
radius_top_right = center_size / 2;
if ( radius_bottom_left > center_size / 2 )
radius_bottom_left = center_size / 2;
if ( radius_bottom_right > center_size / 2 )
radius_bottom_right = center_size / 2;
clocklog(3, "[render] Render dimensions (scaled): size=%d cx=%d cy=%d w=%d h=%d\n",
center_size, center_x, center_y, w, h);
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_SOURCE);
if ( radius_top_left == 0 && radius_top_right == 0
&& radius_bottom_left == 0 && radius_bottom_right == 0 )
{
if ( center_x == 0 && center_y == 0 && center_size == w && center_size == h )
{
cairo_rectangle(cairo, 0, 0, w, h);
colour_set_cairo_source(cairo, &context.background_colour);
cairo_fill(cairo);
}
else
{
cairo_rectangle(cairo, 0, 0, w, h);
colour_set_cairo_source(cairo, &context.border_colour);
cairo_fill(cairo);
cairo_rectangle(cairo, center_x, center_y, center_size, center_size);
colour_set_cairo_source(cairo, &context.background_colour);
cairo_fill(cairo);
}
}
else
{
if ( center_x == 0 && center_y == 0 && center_size == w && center_size == h )
{
rounded_rectangle(cairo, 0, 0, w, h,
radius_top_left, radius_top_right,
radius_bottom_left, radius_bottom_right);
colour_set_cairo_source(cairo, &context.background_colour);
cairo_fill(cairo);
}
else
{
rounded_rectangle(cairo, 0, 0, w, h,
radius_top_left, radius_top_right,
radius_bottom_left, radius_bottom_right);
colour_set_cairo_source(cairo, &context.border_colour);
cairo_fill(cairo);
rounded_rectangle(cairo, center_x, center_y, center_size, center_size,
radius_top_left, radius_top_right,
radius_bottom_left, radius_bottom_right);
colour_set_cairo_source(cairo, &context.background_colour);
cairo_fill(cairo);
}
}
cairo_restore(cairo);
}
static void draw_clock_face (cairo_t *cairo, struct Wlclock_dimensions *dimensions, int32_t scale)
{
if ( context.marking_width == 0 )
return;
/* Radii are choosen to roughly mimic xclock. */
double cx = scale * (dimensions->center_x + (dimensions->center_size / 2));
double cy = scale * (dimensions->center_y + (dimensions->center_size / 2));
double orT = scale * 0.9 * dimensions->center_size / 2;
double orTL = scale * 0.83 * dimensions->center_size / 2;
double orL = scale * 0.8 * dimensions->center_size / 2;
double ir = scale * 0.75 * dimensions->center_size / 2;
double phi, phi_step = 2 * PI / 60;
cairo_save(cairo);
cairo_set_source_rgb(cairo, 1,1,1);
for (int i = 0; i < 60; i++)
{
phi = i * phi_step;
if ( i % 5 == 0) {
char *num;
int x = cx+orT*cos(phi);
int y = cy+orT*sin(phi);
cairo_move_to(cairo, x-4, y+3);
asprintf(&num, "%0.f", (((i+15)%60)*0.2));
cairo_show_text (cairo, num);
x = cx+orTL*cos(phi);
y = cy+orTL*sin(phi);
cairo_move_to(cairo, x, y);
cairo_line_to(cairo, cx + ir * cos(phi), cy + ir * sin(phi));
} else {
int x = cx+orL*cos(phi);
int y = cy+orL*sin(phi);
cairo_move_to(cairo, x, y);
cairo_line_to(cairo, cx + ir * cos(phi), cy + ir * sin(phi));
}
}
cairo_set_line_width(cairo, context.marking_width * scale);
colour_set_cairo_source(cairo, &context.clock_colour);
cairo_stroke(cairo);
cairo_restore(cairo);
}
static void draw_clock_hands (cairo_t *cairo, int32_t size, int32_t scale)
{
/* Radii are choosen to roughly mimic xclock. */
double cxy = scale * size / 2;
double mr = scale * 0.6 * size / 2;
double hr = scale * 0.4 * size / 2;
double ir = scale * 0.075 * size / 2;
time_t now = time(NULL);
struct tm tm = *localtime(&now);
double phi_min_step = 2 * PI / 60;
double phi_min = phi_min_step * (tm.tm_min + 45);
double phi_h_step = 2 * PI / 12;
double phi_h = phi_h_step * (tm.tm_hour + 9);
if (! context.snap)
phi_h += tm.tm_min * phi_h_step / 60.0;
cairo_save(cairo);
colour_set_cairo_source(cairo, &context.clock_colour);
if ( context.hand_width == 0 )
{
/* Xclock-esque clock hands. Not pixel-perfect, but close enough. */
/* Minutes */
cairo_move_to(cairo, cxy + mr * cos(phi_min), cxy + mr * sin(phi_min));
cairo_line_to(cairo, cxy + ir * cos(phi_min + 2.0 / 3.0 * PI),
cxy + ir * sin(phi_min + 2.0 / 3.0 * PI));
cairo_line_to(cairo, cxy + ir * cos(phi_min + 4.0 / 3.0 * PI),
cxy + ir * sin(phi_min + 4.0 / 3.0 * PI));
cairo_line_to(cairo, cxy + mr * cos(phi_min), cxy + mr * sin(phi_min));
/* Hours */
cairo_move_to(cairo, cxy + hr * cos(phi_h), cxy + hr * sin(phi_h));
cairo_line_to(cairo, cxy + ir * cos(phi_h + 2.0 / 3.0 * PI),
cxy + ir * sin(phi_h + 2.0 / 3.0 * PI));
cairo_line_to(cairo, cxy + ir * cos(phi_h + 4.0 / 3.0 * PI),
cxy + ir * sin(phi_h + 4.0 / 3.0 * PI));
cairo_line_to(cairo, cxy + hr * cos(phi_h), cxy + hr * sin(phi_h));
cairo_close_path(cairo);
cairo_fill(cairo);
}
else
{
/* Minutes */
cairo_move_to(cairo, cxy + mr * cos(phi_min), cxy + mr * sin(phi_min));
cairo_line_to(cairo, cxy + ir * cos(phi_min + PI), cxy + ir * sin(phi_min + PI));
/* Hours */
cairo_move_to(cairo, cxy + hr * cos(phi_h), cxy + hr * sin(phi_h));
cairo_line_to(cairo, cxy + ir * cos(phi_h + PI), cxy + ir * sin(phi_h +PI));
cairo_set_line_width(cairo, scale * context.hand_width);
cairo_stroke(cairo);
}
cairo_restore(cairo);
}
static void clear_buffer (cairo_t *cairo)
{
cairo_save(cairo);
cairo_set_operator(cairo, CAIRO_OPERATOR_CLEAR);
cairo_paint(cairo);
cairo_restore(cairo);
}
void render_background_frame (struct Wlclock_surface *surface)
{
struct Wlclock_output *output = surface->output;
uint32_t scale = output->scale;
clocklog(2, "[render] Render background frame: global_name=%d\n",
output->global_name);
if (! next_buffer(&surface->current_background_buffer, context.shm,
surface->background_buffers,
surface->dimensions.w * scale,
surface->dimensions.h * scale))
return;
surface->current_background_buffer->busy = true;
cairo_t *cairo = surface->current_background_buffer->cairo;
clear_buffer(cairo);
draw_background(cairo, &surface->dimensions, scale);
draw_clock_face(cairo, &surface->dimensions, scale);
wl_surface_set_buffer_scale(surface->background_surface, scale);
wl_surface_damage_buffer(surface->background_surface, 0, 0, INT32_MAX, INT32_MAX);
wl_surface_attach(surface->background_surface, surface->current_background_buffer->buffer, 0, 0);
}
void render_hands_frame (struct Wlclock_surface *surface)
{
struct Wlclock_output *output = surface->output;
uint32_t scale = output->scale;
clocklog(2, "[render] Render hands frame: global_name=%d\n",
output->global_name);
if (! next_buffer(&surface->current_hands_buffer, context.shm,
surface->hands_buffers,
surface->dimensions.center_size * scale,
surface->dimensions.center_size * scale))
return;
surface->current_hands_buffer->busy = true;
cairo_t *cairo = surface->current_hands_buffer->cairo;
clear_buffer(cairo);
draw_clock_hands(cairo, surface->dimensions.center_size, scale);
wl_surface_set_buffer_scale(surface->hands_surface, scale);
wl_surface_damage_buffer(surface->hands_surface, 0, 0, INT32_MAX, INT32_MAX);
wl_surface_attach(surface->hands_surface, surface->current_hands_buffer->buffer, 0, 0);
}
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