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/* Mouse and pen input on a CPU surface. */
#include <yasl/yasl.h>
#include <string.h>
int main(int argc, char **argv)
{
bool smoke = argc == 2 && !strcmp(argv[1], "--smoke-test");
yasl_surface *s = yasl_surface_create(
&(struct yasl_surface_options){.title = "YASL input", .width = 640, .height = 480});
if (!s)
return 1;
double px = -100, py = -100, pressure = 0;
bool dirty = false;
int frames = 0, result = 1;
yasl_event e;
for (;;) {
int n = yasl_wait_event(&e, smoke ? 20 : -1);
if (n < 0)
break;
if (e.type == YASL_EVENT_CLOSE || e.type == YASL_EVENT_QUIT ||
(e.type == YASL_EVENT_KEY && e.key.key == YASL_KEY_ESCAPE)) {
result = 0;
break;
}
if (e.type == YASL_EVENT_POINTER || e.type == YASL_EVENT_PEN) {
px = e.x;
py = e.y;
pressure = e.type == YASL_EVENT_PEN ? ((e.pen.axes & YASL_PEN_PRESSURE) ? e.pen.pressure : 0)
: (e.pointer.buttons & YASL_BUTTON_BIT(YASL_BUTTON_PRIMARY)) ? 0.5
: 0;
dirty = true;
}
if (e.type == YASL_EVENT_REFRESH)
dirty = true;
if (dirty) {
int w, h;
uint32_t *pixels = yasl_cpu_pixels(s, &w, &h);
if (!pixels)
break;
double scale = yasl_surface_get_info(s).scale, radius = (8 + pressure * 48) * scale;
for (int y = 0; y < h; y++)
for (int x = 0; x < w; x++) {
double dx = x - px * scale, dy = y - py * scale;
pixels[(size_t)y * w + x] = dx * dx + dy * dy < radius * radius ? 0xffffc060u : 0xff203040u;
}
if (yasl_cpu_present(s) < 0)
break;
dirty = false;
frames++;
}
if (smoke && frames && n == 0) {
result = 0;
break;
}
}
yasl_shutdown();
return result;
}
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