examples/hello.c


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/* A complete CPU-rendered window. Build instructions: docs/getting-started.md. */
#include <yasl/app.h>
#include <stdio.h>

static bool failed;
static void draw(void *ud, struct yasl_surface *surface, struct yasl_frame_context *frame)
{
    (void)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");
        failed = true;
    }
    if (failed) yasl_surface_destroy(surface);
}

int main(void)
{
    struct yasl_window_spec window = {.title = "Hello YASL", .size = {640, 480}};
    struct yasl_app_desc desc = {
        .app_id = "org.example.hello",
        .window = &window,
        .frame = draw,
    };
    int result = yasl_run(&desc);
    if (result) fprintf(stderr, "Could not run the application\n");
    return result || failed ? 1 : 0;
}