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d2d1: Fix miter drawing for degenerated rectangles. 

When a rectangle side has zero length, the miter join generator is
confused because it cannot recover the join angle. This patch avoids
that by using artificially non-degenerate previous and next vertices.

Signed-off-by: Giovanni Mascellani <gio@debian.org>
Signed-off-by: Henri Verbeet <hverbeet@codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Giovanni Mascellani 2020-01-10 17:33:45 +01:00 committed by Alexandre Julliard
parent c78011999b
commit 502c9c7603
2 changed files with 17 additions and 8 deletions
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19
dlls/d2d1/geometry.c
View File

@ -3777,7 +3777,7 @@ static const struct ID2D1RectangleGeometryVtbl d2d_rectangle_geometry_vtbl =
HRESULT d2d_rectangle_geometry_init(struct d2d_geometry *geometry, ID2D1Factory *factory, const D2D1_RECT_F *rect)
{
struct d2d_face *f;
D2D1_POINT_2F *v;
D2D1_POINT_2F *v, v0p, v0n, v1p, v1n, v2p, v2n, v3p, v3n;
float l, r, t, b;
d2d_geometry_init(geometry, factory, &identity, (ID2D1GeometryVtbl *)&d2d_rectangle_geometry_vtbl);
@ -3806,6 +3806,15 @@ HRESULT d2d_rectangle_geometry_init(struct d2d_geometry *geometry, ID2D1Factory
d2d_face_set(&f[1], 0, 2, 3);
geometry->fill.face_count = 2;
d2d_point_set(&v0p, l+1.0f, t);
d2d_point_set(&v0n, l, t+1.0f);
d2d_point_set(&v1p, l, b-1.0f);
d2d_point_set(&v1n, l+1.0f, b);
d2d_point_set(&v2p, r-1.0f, b);
d2d_point_set(&v2n, r, b-1.0f);
d2d_point_set(&v3p, r, t+1.0f);
d2d_point_set(&v3n, r-1.0f, t);
if (!d2d_geometry_outline_add_line_segment(geometry, &v[0], &v[1]))
goto fail;
if (!d2d_geometry_outline_add_line_segment(geometry, &v[1], &v[2]))
@ -3815,13 +3824,13 @@ HRESULT d2d_rectangle_geometry_init(struct d2d_geometry *geometry, ID2D1Factory
if (!d2d_geometry_outline_add_line_segment(geometry, &v[3], &v[0]))
goto fail;
if (!d2d_geometry_outline_add_join(geometry, &v[3], &v[0], &v[1]))
if (!d2d_geometry_outline_add_join(geometry, &v0p, &v[0], &v0n))
goto fail;
if (!d2d_geometry_outline_add_join(geometry, &v[0], &v[1], &v[2]))
if (!d2d_geometry_outline_add_join(geometry, &v1p, &v[1], &v1n))
goto fail;
if (!d2d_geometry_outline_add_join(geometry, &v[1], &v[2], &v[3]))
if (!d2d_geometry_outline_add_join(geometry, &v2p, &v[2], &v2n))
goto fail;
if (!d2d_geometry_outline_add_join(geometry, &v[2], &v[3], &v[0]))
if (!d2d_geometry_outline_add_join(geometry, &v3p, &v[3], &v3n))
goto fail;
return S_OK;

6
dlls/d2d1/tests/d2d1.c
View File

@ -5861,16 +5861,16 @@ static void test_draw_geometry(void)
ok(match, "Figure does not match.\n");
match = compare_figure(surface, 0, 160, 160, 160, 0xff652e89, 0, "5mAUjAEUjAEUjAEUjAEUhmIA");
todo_wine ok(match, "Figure does not match.\n");
ok(match, "Figure does not match.\n");
match = compare_figure(surface, 160, 160, 160, 160, 0xff652e89, 0, "vmBkPGQ8ZDxkPGTeYQAA");
todo_wine ok(match, "Figure does not match.\n");
ok(match, "Figure does not match.\n");
match = compare_figure(surface, 320, 160, 160, 160, 0xff652e89, 0,
"5i4UjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEU"
"jAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEU"
"jAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEU"
"jAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEU"
"jAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUjAEUhjAA");
todo_wine ok(match, "Figure does not match.\n");
ok(match, "Figure does not match.\n");
match = compare_figure(surface, 480, 160, 160, 160, 0xff652e89, 0,
"vi5kPGQ8ZDxkPGQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwU"
"PBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8FDwUPBQ8"