bob/screensaver
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now uses RectSaver as screensaver

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This commit is contained in:
Bob Polis 2020-10-26 23:04:49 +01:00
parent c52d223f39
commit f3d25a2084
1 changed files with 10 additions and 46 deletions
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56
main.cpp
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@ -18,15 +18,17 @@
#include <libscerror.hpp>
#include <cmath>
#include <thread>
#include "RectSaver.hpp"
const int WIDTH {700};
const int HEIGHT {700};
const double FPS {50.0};
const int nanosecs {static_cast<int>(round(1000000000.0 / FPS))};
const int nanosecs {};
sc::gui::Window* main_window {nullptr};
sc::gui::Image* main_image {nullptr};
cairo_t* cr {nullptr};
// cairo_t* cr {nullptr};
RectSaver* main_saver {nullptr};
bool expired {true};
bool should_run {true};
@ -46,58 +48,17 @@ void update_frame() {
struct timespec delay;
delay.tv_sec = 0;
delay.tv_nsec = nanosecs;
delay.tv_nsec = static_cast<int>(round(1000000000.0 / main_saver->fps()));
nanosleep(&delay, nullptr);
}
}
void draw() {
static int x = 300;
static int y = 300;
static int dx = 1;
static int dy = 1;
static double r = 0;
static double dr = 0.01;
if (expired) {
expired = false;
sc::gui::ImageLock lock {*main_image};
// black background
cairo_set_source_rgb(cr, 0, 0, 0);
cairo_rectangle(cr, 0, 0, WIDTH, HEIGHT);
cairo_fill(cr);
// orange rectangle
cairo_rectangle(cr, x, y, 100, 100);
cairo_set_source_rgb(cr, 1, 0.5, 0);
cairo_fill(cr);
// black rectangle
cairo_rectangle(cr, 200, 200, 100, 100);
cairo_set_source_rgb(cr, r, 0, 0);
cairo_fill(cr);
// dark green text
cairo_set_source_rgb(cr, 0.2, 0.5, 0);
cairo_select_font_face(cr, "Helvetica", CAIRO_FONT_SLANT_NORMAL, CAIRO_FONT_WEIGHT_BOLD);
cairo_set_font_size(cr, 42);
cairo_move_to(cr, 50, 100);
cairo_show_text(cr, "abcdefghijklmnopqrstuvwxyz");
// show
main_saver->draw_frame();
main_window->show_image(*main_image);
// update
x += dx;
y += dy;
if (x > 400) dx = -1;
if (y > 400) dy = -1;
if (x < 300) dx = 1;
if (y < 300) dy = 1;
r += dr;
if (r > 1) dr = -0.01;
if (r < 0) dr = 0.01;
}
}
@ -156,7 +117,10 @@ int main(int argc, const char * argv[]) {
main_image = &image;
cairo_surface_t* cs {cairo_image_surface_create_for_data(static_cast<unsigned char*>(s->pixels),
CAIRO_FORMAT_RGB24, s->w, s->h, s->pitch)};
cr = cairo_create(cs);
cairo_t* cr {cairo_create(cs)};
RectSaver saver {cr, {0, 0, WIDTH, HEIGHT}};
main_saver = &saver;
// setup thread which periodically sets 'expired'
std::thread frame_timer {update_frame};