| // Copyright 2016 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef UI_GFX_MOJOM_TRANSFORM_MOJOM_TRAITS_H_ |
| #define UI_GFX_MOJOM_TRANSFORM_MOJOM_TRAITS_H_ |
| |
| #include "mojo/public/cpp/bindings/array_traits.h" |
| #include "ui/gfx/geometry/transform.h" |
| #include "ui/gfx/mojom/transform.mojom-shared.h" |
| |
| namespace mojo { |
| |
| template <> |
| struct StructTraits<gfx::mojom::TransformDataView, gfx::Transform> { |
| static std::optional<std::array<float, 16>> matrix( |
| const gfx::Transform& transform) { |
| if (transform.IsIdentity()) |
| return std::nullopt; |
| std::array<float, 16> matrix; |
| transform.GetColMajorF(matrix.data()); |
| return matrix; |
| } |
| |
| static bool Read(gfx::mojom::TransformDataView data, gfx::Transform* out) { |
| ArrayDataView<float> matrix; |
| data.GetMatrixDataView(&matrix); |
| if (matrix.is_null()) { |
| out->MakeIdentity(); |
| return true; |
| } |
| *out = gfx::Transform::ColMajorF(matrix.data()); |
| return true; |
| } |
| }; |
| |
| } // namespace mojo |
| |
| #endif // UI_GFX_MOJOM_TRANSFORM_MOJOM_TRAITS_H_ |