Class app_state

examples/main_image.cpp:107–158

enum pending_action { ACTION_NONE, ACTION_PCS, ACTION_PVS, ACTION_PVS_BOX };

struct app_state {
    // Model
    sam3_params         params;
    std::shared_ptr<sam3_model> model;
    sam3_state_ptr      state;

    // Image
    sam3_image          image;
    GLuint              tex_image   = 0;
    GLuint              tex_overlay = 0;
    bool                image_encoded = false;

    // Interaction mode
    interaction_mode    mode = MODE_POINTS;

    // PCS
    char                text_prompt[256] = {};
    float               score_threshold  = 0.5f;
    float               nms_threshold    = 0.1f;
    std::vector<sam3_box> pos_exemplars;
    std::vector<sam3_box> neg_exemplars;

    // PVS
    std::vector<sam3_point> pos_points;
    std::vector<sam3_point> neg_points;
    bool                multimask = false;
    sam3_box            pvs_box = {0, 0, 0, 0};
    bool                has_pvs_box = false;

    // Results
    sam3_result         result;
    bool                show_masks = true;

    // Box drawing state
    bool                dragging    = false;
    float               drag_x0     = 0;
    float               drag_y0     = 0;

    // Display
    float               canvas_x    = 0;
    float               canvas_y    = 0;
    float               canvas_w    = 0;
    float               canvas_h    = 0;

    // Status / busy overlay
    char                status[256] = "Ready.";
    bool                busy        = false;
    pending_action      pending     = ACTION_NONE;

    // Model type
    bool                visual_only = false;  // true for SAM2 / SAM3 visual-only
};

static GLuint upload_texture(const uint8_t* data, int w, int h, int ch, GLuint existing = 0) {
    GLuint tex = existing;