Re: [PATCH 4/4] d2d1: Implement D2D1MakeSkewMatrix().

[Henri Verbeet]

On Wed, 3 Oct 2018 at 09:24, Nikolay Sivov  wrote:
> - static const struct
> - {
> -
>    float angle_x;
> -
>    float angle_y;
> -
>    D2D1_POINT_2F center;
> -
>    D2D1_MATRIX_3X2_F matrix;
> - }
> - skew_tests[] =
> - {
> -
>    { 0.0f, 0.0f, { 0.0f, 0.0f }, { 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f } },
> -
>    { 45.0f, 0.0f, { 0.0f, 0.0f }, { 1.0f, 0.0f, 1.0f, 1.0f, 0.0f, 0.0f } },
> -
>    { 0.0f, 0.0f, { 10.0f, -3.0f }, { 1.0f, 0.0f, 0.0f, 1.0f, 0.0f, 0.0f } },
> -
>    { -45.0f, 45.0f, { 0.1f, 0.5f }, { 1.0f, 1.0f, -1.0f, 1.0f, 0.5f, -0.1f } },
> -
>    { -45.0f, 45.0f, { 1.0f, 2.0f }, { 1.0f, 1.0f, -1.0f, 1.0f, 2.0f, -1.0f } },
> -
>    { 45.0f, -45.0f, { 1.0f, 2.0f }, { 1.0f, -1.0f, 1.0f, 1.0f, -2.0f, 1.0f } },
> -
>    { 30.0f, -60.0f, { 12.0f, -5.0f }, { 1.0f, -1.7320509f, 0.577350259f, 1.0f, 2.88675117f, 20.7846107f } },
> - };

What happens for angle_x/angle_y 90.0f?