| /* |
| * Copyright 2021 Google LLC |
| * |
| * Use of this source code is governed by a BSD-style license that can be |
| * found in the LICENSE file. |
| */ |
| |
| #include "experimental/graphite/src/geom/Transform_graphite.h" |
| |
| #include "experimental/graphite/src/geom/Rect.h" |
| #include "src/core/SkMatrixPriv.h" |
| |
| namespace skgpu { |
| |
| namespace { |
| |
| Rect map_rect(const SkM44& m, const Rect& r) { |
| // TODO: Can Rect's (l,t,-r,-b) structure be used to optimize mapRect? |
| // TODO: Can take this opportunity to implement 100% accurate perspective plane clipping since |
| // it doesn't have to match raster/ganesh rendering behavior. |
| return SkMatrixPriv::MapRect(m, r.asSkRect()); |
| } |
| |
| } // anonymous namespace |
| |
| Transform::Transform(const SkM44& m) |
| : fM(m) { |
| if (fM.invert(&fInvM)) { |
| // TODO: actually detect these |
| fType = (fM == SkM44()) ? Type::kIdentity : Type::kPerspective; |
| fScale = {1.f, 1.f}; |
| } else { |
| fType = Type::kInvalid; |
| fInvM = SkM44(); |
| fScale = {1.f, 1.f}; |
| } |
| } |
| |
| bool Transform::operator==(const Transform& t) const { |
| // Checking fM should be sufficient as all other values are computed from it. |
| SkASSERT(fM != t.fM || (fInvM == t.fInvM && fType == t.fType && fScale == t.fScale)); |
| return fM == t.fM; |
| } |
| |
| Rect Transform::mapRect(const Rect& rect) const { return map_rect(fM, rect); } |
| Rect Transform::inverseMapRect(const Rect& rect) const { return map_rect(fInvM, rect); } |
| |
| } // namespace skgpu |
