cxxtest: svg-affine-test.h fails

[Alex Valavanis]

The svg-affine-test.h unit test fails with lp:inkscape r12442. This may be related to recent changes in 2geom in r10025, although I haven't checked this.

A couple of notes:

* svg-affine.cpp now seems to return long forms of transform and scale attributes e.g., "transform(1,0) instead of transform(1)".

* Some affine transforms are now represented as general matrix transforms rather than simple forms e.g., matrix(...) rather than skewY(390)

Please could someone familiar with 2geom take a look?

In SvgAffineTest::testWriteTranslate:
../../src/svg/svg-affine-test.h:131: Error: Expected streq_rel( str, write_translate_tests[i].str ), found !streq_rel( translate(1,0), translate(1) )
In SvgAffineTest::testWriteScale:
../../src/svg/svg-affine-test.h:140: Error: Expected streq_rel( str, write_scale_tests[i].str ), found !streq_rel( scale(0,0), scale(0) )
In SvgAffineTest::testWriteRotate:
../../src/svg/svg-affine-test.h:149: Error: Expected streq_rel( str, write_rotate_tests[i].str ), found !streq_rel( matrix(0.97437006,0.22495105,-0.22495105,0.97437006,0,0), rotate(13) )
../../src/svg/svg-affine-test.h:149: Error: Expected streq_rel( str, write_rotate_tests[i].str ), found !streq_rel( matrix(0.97437006,-0.22495105,0.22495105,0.97437006,-2.2950521,1.8565867), rotate(-13,7,11) )
In SvgAffineTest::testWriteSkew:
../../src/svg/svg-affine-test.h:158: Error: Expected streq_rel( str, write_skew_tests[i].str ), found !streq_rel( matrix(1,0,0.57735027,1,0,0), skewX(30) )
../../src/svg/svg-affine-test.h:158: Error: Expected streq_rel( str, write_skew_tests[i].str ), found !streq_rel( matrix(1,0,-0.57735027,1,0,0), skewX(-30) )
../../src/svg/svg-affine-test.h:158: Error: Expected streq_rel( str, write_skew_tests[i].str ), found !streq_rel( matrix(1,0.57735027,0,1,0,0), skewY(390) )
.
In SvgAffineTest::testReadFailures:
../../src/svg/svg-affine-test.h:179: Error: Test failed: matrix(1,2,3,4,5,6,)
../../src/svg/svg-affine-test.h:179: Error: Assertion failed: !sp_svg_transform_read(read_fail_tests[i], &cm)
../../src/svg/svg-affine-test.h:179: Error: Test failed: matrix(1,2,3,4,5e6-3)
../../src/svg/svg-affine-test.h:179: Error: Assertion failed: !sp_svg_transform_read(read_fail_tests[i], &cm)
../../src/svg/svg-affine-test.h:179: Error: Test failed: matrix(1,2,3,4,5e6.3)
../../src/svg/svg-affine-test.h:179: Error: Assertion failed: !sp_svg_transform_read(read_fail_tests[i], &cm)
../../src/svg/svg-affine-test.h:179: Error: Test failed: translate(1,)
../../src/svg/svg-affine-test.h:179: Error: Assertion failed: !sp_svg_transform_read(read_fail_tests[i], &cm)
../../src/svg/svg-affine-test.h:179: Error: Test failed: translate(1,6,)
../../src/svg/svg-affine-test.h:179: Error: Assertion failed: !sp_svg_transform_read(read_fail_tests[i], &cm)

[Johan Engelen (johanengelen)]

It is impossible that these tests ever passed. There is no code in our cvs history that can output "translate" with only a single number, or "skew.." etc.

[Liam P. White (liampwhite)]

(Almost complete) fix committed in r13688
<https://bazaar.launchpad.net/~inkscape.dev/inkscape/trunk/revision/13688>

@johan, can you determine whether it is possible to finish this? Jasper seems to have hinted that it was possible…

    /* } else if (transform.withoutTranslation().isRotation()) {
        // FIXME someone please figure out if this can actually be done
        // The rotation angle is correct, the points are not
        // Refer to the matrix in svg-affine-test.h

        // We are a rotation about a special axis
        strcpy(c + p, "rotate(");
        p += 7;

        Geom::Affine const sans_translate = transform.withoutTranslation();
        double angle = std::atan2(sans_translate[1], sans_translate[0]) * (180 / M_PI);
        p += sp_svg_number_write_de(c + p, sizeof(c) - p, angle, prec, min_exp);
        c[p++] = ',';

        Geom::Point pt = transform.translation();
        p += sp_svg_number_write_de(c + p, sizeof(c) - p, pt[Geom::X], prec, min_exp);

        c[p++] = ',';

        p += sp_svg_number_write_de(c + p, sizeof(c) - p, pt[Geom::Y], prec, min_exp);

        c[p++] = ')';
        c[p] = '\000';*/