Function test_marker_clipping

lib/matplotlib/tests/test_marker.py:173–210

(fig_ref, fig_test)

@check_figures_equal(extensions=['png', 'pdf', 'svg'])
def test_marker_clipping(fig_ref, fig_test):
    # Plotting multiple markers can trigger different optimized paths in
    # backends, so compare single markers vs multiple to ensure they are
    # clipped correctly.
    marker_count = len(markers.MarkerStyle.markers)
    marker_size = 50
    ncol = 7
    nrow = marker_count // ncol + 1

    width = 2 * marker_size * ncol
    height = 2 * marker_size * nrow * 2
    fig_ref.set_size_inches((width / fig_ref.dpi, height / fig_ref.dpi))
    ax_ref = fig_ref.add_axes((0, 0, 1, 1))
    fig_test.set_size_inches((width / fig_test.dpi, height / fig_ref.dpi))
    ax_test = fig_test.add_axes((0, 0, 1, 1))

    for i, marker in enumerate(markers.MarkerStyle.markers):
        x = i % ncol
        y = i // ncol * 2

        # Singular markers per call.
        ax_ref.plot([x, x], [y, y + 1], c='k', linestyle='-', lw=3)
        ax_ref.plot(x, y, c='k',
                    marker=marker, markersize=marker_size, markeredgewidth=10,
                    fillstyle='full', markerfacecolor='white')
        ax_ref.plot(x, y + 1, c='k',
                    marker=marker, markersize=marker_size, markeredgewidth=10,
                    fillstyle='full', markerfacecolor='white')

        # Multiple markers in a single call.
        ax_test.plot([x, x], [y, y + 1], c='k', linestyle='-', lw=3,
                     marker=marker, markersize=marker_size, markeredgewidth=10,
                     fillstyle='full', markerfacecolor='white')

    ax_ref.set(xlim=(-0.5, ncol), ylim=(-0.5, 2 * nrow))
    ax_test.set(xlim=(-0.5, ncol), ylim=(-0.5, 2 * nrow))
    ax_ref.axis('off')
    ax_test.axis('off')


def test_marker_init_transforms():