Function screen_to_image

examples/main_image.cpp:312–318

Convert screen position to image coordinates

// Convert screen position to image coordinates
static bool screen_to_image(const app_state& app, float sx, float sy,
                             float& ix, float& iy) {
    if (app.canvas_w <= 0 || app.canvas_h <= 0) return false;
    ix = (sx - app.canvas_x) / app.canvas_w * app.image.width;
    iy = (sy - app.canvas_y) / app.canvas_h * app.image.height;
    return ix >= 0 && iy >= 0 && ix < app.image.width && iy < app.image.height;
}

// Draw a spinning indicator + message as a centered overlay
static void draw_busy_overlay(const char* message) {