1/*
2 * Copyright 2020 Google Inc.
3 *
4 * Use of this source code is governed by a BSD-style license that can be
5 * found in the LICENSE file.
6 */
7
8#include "src/gpu/ops/SmallPathShapeData.h"
9
10#include "src/gpu/geometry/GrStyledShape.h"
11
12namespace skgpu::v1 {
13
14SmallPathShapeDataKey::SmallPathShapeDataKey(const GrStyledShape& shape, uint32_t dim) {
15    // Shapes' keys are for their pre-style geometry, but by now we shouldn't have any
16    // relevant styling information.
17    SkASSERT(shape.style().isSimpleFill());
18    SkASSERT(shape.hasUnstyledKey());
19    int shapeKeySize = shape.unstyledKeySize();
20    fKey.reset(1 + shapeKeySize);
21    fKey[0] = dim;
22    shape.writeUnstyledKey(&fKey[1]);
23}
24
25SmallPathShapeDataKey::SmallPathShapeDataKey(const GrStyledShape& shape, const SkMatrix& ctm) {
26    // Shapes' keys are for their pre-style geometry, but by now we shouldn't have any
27    // relevant styling information.
28    SkASSERT(shape.style().isSimpleFill());
29    SkASSERT(shape.hasUnstyledKey());
30    // We require the upper left 2x2 of the matrix to match exactly for a cache hit.
31    SkScalar sx = ctm.get(SkMatrix::kMScaleX);
32    SkScalar sy = ctm.get(SkMatrix::kMScaleY);
33    SkScalar kx = ctm.get(SkMatrix::kMSkewX);
34    SkScalar ky = ctm.get(SkMatrix::kMSkewY);
35    SkScalar tx = ctm.get(SkMatrix::kMTransX);
36    SkScalar ty = ctm.get(SkMatrix::kMTransY);
37    // Allow 8 bits each in x and y of subpixel positioning.
38    tx -= SkScalarFloorToScalar(tx);
39    ty -= SkScalarFloorToScalar(ty);
40    SkFixed fracX = SkScalarToFixed(tx) & 0x0000FF00;
41    SkFixed fracY = SkScalarToFixed(ty) & 0x0000FF00;
42    int shapeKeySize = shape.unstyledKeySize();
43    fKey.reset(5 + shapeKeySize);
44    fKey[0] = SkFloat2Bits(sx);
45    fKey[1] = SkFloat2Bits(sy);
46    fKey[2] = SkFloat2Bits(kx);
47    fKey[3] = SkFloat2Bits(ky);
48    fKey[4] = fracX | (fracY >> 8);
49    shape.writeUnstyledKey(&fKey[5]);
50}
51
52} // namespace skgpu::v1
53