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[test] Add off-centre tests to in-fill-trapezoid.

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Reading through the previous commit spotted that the arguments to
edge_compare_for_y_against_x were transposed, but the test-suite had
failed to catch detect it. This is due that in order to actually
solve the equation we need to have a diagonal edge passing near an
off-centre point of interest, which was not among the test cases. So add
some off-centre tests to fully exercise the code.
This commit is contained in:
Chris Wilson 2008-11-06 01:02:23 +00:00
parent f5965cb7d6
commit 9dee7af41f
1 changed files with 66 additions and 0 deletions
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66
test/in-fill-trapezoid.c
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@ -124,6 +124,72 @@ draw (cairo_t *cr, int width, int height)
ret = CAIRO_TEST_FAILURE;
}
/* check off-centre */
cairo_new_path (cr);
cairo_arc (cr, 7.5, 0, 10, 0, 2 * M_PI);
cairo_arc_negative (cr, 7.5, 0, 5, 0, -2 * M_PI);
if (cairo_in_fill (cr, 7.5, 0)) {
cairo_test_log (ctx, "Error: Found an unexpected point inside circular hole\n");
ret = CAIRO_TEST_FAILURE;
}
cairo_new_path (cr);
cairo_arc (cr, 0, 7.5, 10, 0, 2 * M_PI);
cairo_arc_negative (cr, 0, 7.5, 5, 0, -2 * M_PI);
if (cairo_in_fill (cr, 0, 7.5)) {
cairo_test_log (ctx, "Error: Found an unexpected point inside circular hole\n");
ret = CAIRO_TEST_FAILURE;
}
cairo_new_path (cr);
cairo_arc (cr, 15, 0, 10, 0, 2 * M_PI);
if (! cairo_in_fill (cr, 15, 0)) {
cairo_test_log (ctx, "Error: Failed to find point inside circle\n");
ret = CAIRO_TEST_FAILURE;
}
cairo_new_path (cr);
cairo_arc (cr, 0, 15, 10, 0, 2 * M_PI);
if (! cairo_in_fill (cr, 0, 15)) {
cairo_test_log (ctx, "Error: Failed to find point inside circle\n");
ret = CAIRO_TEST_FAILURE;
}
/* simple rectangle */
cairo_new_path (cr);
cairo_rectangle (cr, 10, 0, 5, 5);
if (cairo_in_fill (cr, 0, 0)) {
cairo_test_log (ctx, "Error: Found an unexpected point outside rectangle\n");
ret = CAIRO_TEST_FAILURE;
}
if (cairo_in_fill (cr, 20, 20)) {
cairo_test_log (ctx, "Error: Found an unexpected point outside rectangle\n");
ret = CAIRO_TEST_FAILURE;
}
if (! cairo_in_fill (cr, 12.5, 2.5)) {
cairo_test_log (ctx, "Error: Failed to find point inside rectangle\n");
ret = CAIRO_TEST_FAILURE;
}
/* off-centre triangle */
cairo_new_path (cr);
cairo_move_to (cr, 10, 0);
cairo_line_to (cr, 15, 5);
cairo_line_to (cr, 5, 5);
cairo_close_path (cr);
if (cairo_in_fill (cr, 0, 0) ||
cairo_in_fill (cr, 10, 10) ||
cairo_in_fill (cr, 20, 0) ||
cairo_in_fill (cr, 7, 2.5) ||
cairo_in_fill (cr, 13, 2.5))
{
cairo_test_log (ctx, "Error: Found an unexpected point outside triangle\n");
ret = CAIRO_TEST_FAILURE;
}
if (! cairo_in_fill (cr, 8, 2.5) ||
! cairo_in_fill (cr, 12, 2.5))
{
cairo_test_log (ctx, "Error: Failed to find point inside triangle\n");
ret = CAIRO_TEST_FAILURE;
}
return ret;
}