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1 | 1 |
2 /* | 2 /* |
3 * Copyright 2006 The Android Open Source Project | 3 * Copyright 2006 The Android Open Source Project |
4 * | 4 * |
5 * Use of this source code is governed by a BSD-style license that can be | 5 * Use of this source code is governed by a BSD-style license that can be |
6 * found in the LICENSE file. | 6 * found in the LICENSE file. |
7 */ | 7 */ |
8 | 8 |
9 | 9 |
10 #include "SkCamera.h" | 10 #include "SkCamera.h" |
11 | 11 |
12 static SkScalar SkScalarDotDiv(int count, const SkScalar a[], int step_a, | 12 static SkScalar SkScalarDotDiv(int count, const SkScalar a[], int step_a, |
13 const SkScalar b[], int step_b, | 13 const SkScalar b[], int step_b, |
14 SkScalar denom) { | 14 SkScalar denom) { |
15 #ifdef SK_SCALAR_IS_FLOAT | |
16 float prod = 0; | 15 float prod = 0; |
17 for (int i = 0; i < count; i++) { | 16 for (int i = 0; i < count; i++) { |
18 prod += a[0] * b[0]; | 17 prod += a[0] * b[0]; |
19 a += step_a; | 18 a += step_a; |
20 b += step_b; | 19 b += step_b; |
21 } | 20 } |
22 return prod / denom; | 21 return prod / denom; |
23 #else | |
24 Sk64 prod, tmp; | |
25 | |
26 prod.set(0); | |
27 for (int i = 0; i < count; i++) { | |
28 tmp.setMul(a[0], b[0]); | |
29 prod.add(tmp); | |
30 a += step_a; | |
31 b += step_b; | |
32 } | |
33 prod.div(denom, Sk64::kRound_DivOption); | |
34 return prod.get32(); | |
35 #endif | |
36 } | 22 } |
37 | 23 |
38 static SkScalar SkScalarDot(int count, const SkScalar a[], int step_a, | 24 static SkScalar SkScalarDot(int count, const SkScalar a[], int step_a, |
39 const SkScalar b[], int step_b) { | 25 const SkScalar b[], int step_b) { |
40 #ifdef SK_SCALAR_IS_FLOAT | |
41 float prod = 0; | 26 float prod = 0; |
42 for (int i = 0; i < count; i++) { | 27 for (int i = 0; i < count; i++) { |
43 prod += a[0] * b[0]; | 28 prod += a[0] * b[0]; |
44 a += step_a; | 29 a += step_a; |
45 b += step_b; | 30 b += step_b; |
46 } | 31 } |
47 return prod; | 32 return prod; |
48 #else | |
49 Sk64 prod, tmp; | |
50 | |
51 prod.set(0); | |
52 for (int i = 0; i < count; i++) { | |
53 tmp.setMul(a[0], b[0]); | |
54 prod.add(tmp); | |
55 a += step_a; | |
56 b += step_b; | |
57 } | |
58 return prod.getFixed(); | |
59 #endif | |
60 } | 33 } |
61 | 34 |
62 /////////////////////////////////////////////////////////////////////////////// | 35 /////////////////////////////////////////////////////////////////////////////// |
63 | 36 |
64 SkUnitScalar SkPoint3D::normalize(SkUnit3D* unit) const { | 37 SkUnitScalar SkPoint3D::normalize(SkUnit3D* unit) const { |
65 #ifdef SK_SCALAR_IS_FLOAT | |
66 float mag = sk_float_sqrt(fX*fX + fY*fY + fZ*fZ); | 38 float mag = sk_float_sqrt(fX*fX + fY*fY + fZ*fZ); |
67 if (mag) { | 39 if (mag) { |
68 float scale = 1.0f / mag; | 40 float scale = 1.0f / mag; |
69 unit->fX = fX * scale; | 41 unit->fX = fX * scale; |
70 unit->fY = fY * scale; | 42 unit->fY = fY * scale; |
71 unit->fZ = fZ * scale; | 43 unit->fZ = fZ * scale; |
72 } else { | 44 } else { |
73 unit->fX = unit->fY = unit->fZ = 0; | 45 unit->fX = unit->fY = unit->fZ = 0; |
74 } | 46 } |
75 #else | |
76 Sk64 tmp1, tmp2; | |
77 | |
78 tmp1.setMul(fX, fX); | |
79 tmp2.setMul(fY, fY); | |
80 tmp1.add(tmp2); | |
81 tmp2.setMul(fZ, fZ); | |
82 tmp1.add(tmp2); | |
83 | |
84 SkFixed mag = tmp1.getSqrt(); | |
85 if (mag) { | |
86 // what if mag < SK_Fixed1 ??? we will underflow the fixdiv | |
87 SkFixed scale = SkFixedDiv(SK_Fract1, mag); | |
88 unit->fX = SkFixedMul(fX, scale); | |
89 unit->fY = SkFixedMul(fY, scale); | |
90 unit->fZ = SkFixedMul(fZ, scale); | |
91 } else { | |
92 unit->fX = unit->fY = unit->fZ = 0; | |
93 } | |
94 #endif | |
95 return mag; | 47 return mag; |
96 } | 48 } |
97 | 49 |
98 SkUnitScalar SkUnit3D::Dot(const SkUnit3D& a, const SkUnit3D& b) { | 50 SkUnitScalar SkUnit3D::Dot(const SkUnit3D& a, const SkUnit3D& b) { |
99 return SkUnitScalarMul(a.fX, b.fX) + | 51 return SkUnitScalarMul(a.fX, b.fX) + |
100 SkUnitScalarMul(a.fY, b.fY) + | 52 SkUnitScalarMul(a.fY, b.fY) + |
101 SkUnitScalarMul(a.fZ, b.fZ); | 53 SkUnitScalarMul(a.fZ, b.fZ); |
102 } | 54 } |
103 | 55 |
104 void SkUnit3D::Cross(const SkUnit3D& a, const SkUnit3D& b, SkUnit3D* cross) { | 56 void SkUnit3D::Cross(const SkUnit3D& a, const SkUnit3D& b, SkUnit3D* cross) { |
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416 } | 368 } |
417 | 369 |
418 #include "SkCanvas.h" | 370 #include "SkCanvas.h" |
419 | 371 |
420 void Sk3DView::applyToCanvas(SkCanvas* canvas) const { | 372 void Sk3DView::applyToCanvas(SkCanvas* canvas) const { |
421 SkMatrix matrix; | 373 SkMatrix matrix; |
422 | 374 |
423 this->getMatrix(&matrix); | 375 this->getMatrix(&matrix); |
424 canvas->concat(matrix); | 376 canvas->concat(matrix); |
425 } | 377 } |
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