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/* A complete CPU-rendered window. Build instructions: docs/getting-started.md. */
#include <yasl/app.h>
#include <stdio.h>
struct app {
bool failed;
};
static enum yasl_app_result init(void *ud, struct yasl_display *display)
{
struct yasl_window_spec spec = {.title = "Hello YASL", .size = {640, 480}};
struct yasl_surface *surface = yasl_surface_create_toplevel(display, &spec);
if (!surface) {
perror("yasl_surface_create_toplevel");
((struct app *)ud)->failed = true;
return YASL_APP_QUIT;
}
yasl_surface_request_frame(surface);
return YASL_APP_CONTINUE;
}
static enum yasl_app_result event(void *ud, const struct yasl_event *event)
{
(void)ud;
return event->type == YASL_EVENT_WINDOW_CLOSE ? YASL_APP_QUIT : YASL_APP_CONTINUE;
}
static void draw(void *ud, struct yasl_surface *surface, struct yasl_frame_context *frame)
{
struct app *app = ud;
size_t count = (size_t)frame->size.x * frame->size.y;
for (size_t i = 0; i < count; i++)
frame->cpu.pixels[i] = 0xff306090; /* Opaque premultiplied ARGB. */
if (!yasl_frame_present_cpu(frame, NULL, 0)) {
fprintf(stderr, "Could not present the draw target\n");
app->failed = true;
}
if (app->failed) yasl_surface_destroy(surface);
}
int main(void)
{
struct app app = {0};
struct yasl_app_desc desc = {
.app_id = "org.example.hello",
.userdata = &app,
.init = init,
.event = event,
.frame = draw,
};
int result = yasl_run(&desc);
if (result) fprintf(stderr, "Could not run the application\n");
return result || app.failed ? 1 : 0;
}
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