ZOulhadj

static void copy_rect(char* buffer_src, int pitch_a,
                      char* buffer_dst, int pitch_b,
                      int from_min_x, int from_min_y,
                      int from_max_x, int from_max_y,
                      int to_min_x, int to_min_y)
{
    char* src = buffer_src + from_min_y * pitch_a + from_min_x;
    char* dst = buffer_dst + to_min_y   * pitch_b + to_min_x;

    int width  = from_max_x - from_min_x;

ZOulhadj

class Camera {
private:
    glm::vec3 mPosition;
    glm::quat mOrientation;

public:
    void pitch(float pitchRadians) {
        rotate(pitchRadians, glm::vec3(1.0f, 0.0f, 0.0f));
    }