code: public void addQuad(float m00, float m01, float m10, float m11, float tx, float ty,
                        float left, float top, float right, float bottom,
                        float sl, float st, float sr, float sb) {
      texCore.addQuad(m00, m01, m10, m11, tx, ty,
                      left,  top,    sl, st,
                      right, top,    sr, st,
                      left,  bottom, sl, sb,
                      right, bottom, sr, sb);
      if (GLContext.STATS_ENABLED) ctx.stats.quadsRendered++;
    }
docs: Adds an axis-aligned quad to the current render operation. {@code left, top, right, bottom}
  define the bounds of the quad. {@code sl, st, sr, sb} define the texture coordinates.