OLD | NEW |
---|---|
(Empty) | |
1 /* | |
2 * Copyright 2016 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 #ifndef SKSL_INDEX | |
9 #define SKSL_INDEX | |
10 | |
11 #include "SkSLExpression.h" | |
12 #include "SkSLUtil.h" | |
13 | |
14 namespace SkSL { | |
15 | |
16 /** | |
17 * Given a type, returns the type that will resulting from extracting an array v alue from it. | |
dogben
2016/06/22 17:43:57
typo: s/resulting/result/
| |
18 */ | |
19 static std::shared_ptr<Type> index_type(std::shared_ptr<Type> type) { | |
20 if (type->kind() == Type::kMatrix_Kind) { | |
21 if (type->componentType() == kFloat_Type) { | |
22 switch (type->columns()) { | |
23 case 2: return kVec2_Type; | |
24 case 3: return kVec3_Type; | |
25 case 4: return kVec4_Type; | |
26 default: ASSERT(false); | |
27 } | |
28 } else { | |
29 ASSERT(type->componentType() == kDouble_Type); | |
30 switch (type->columns()) { | |
31 case 2: return kDVec2_Type; | |
32 case 3: return kDVec3_Type; | |
33 case 4: return kDVec4_Type; | |
34 default: ASSERT(false); | |
35 } | |
36 } | |
37 } | |
38 return type->componentType(); | |
39 } | |
40 | |
41 /** | |
42 * An expression which extracts a value from an array or matrix, as in 'm[2]'. | |
43 */ | |
44 struct IndexExpression : public Expression { | |
45 IndexExpression(std::unique_ptr<Expression> base, std::unique_ptr<Expression > index) | |
46 : INHERITED(base->fPosition, kIndex_Kind, index_type(base->fType)) | |
47 , fBase(std::move(base)) | |
48 , fIndex(std::move(index)) { | |
49 ASSERT(fIndex->fType == kInt_Type); | |
50 } | |
51 | |
52 virtual std::string description() const override { | |
dogben
2016/06/22 17:43:57
nit: remove virtual
| |
53 return fBase->description() + "[" + fIndex->description() + "]"; | |
54 } | |
55 | |
56 const std::unique_ptr<Expression> fBase; | |
57 const std::unique_ptr<Expression> fIndex; | |
58 | |
59 typedef Expression INHERITED; | |
60 }; | |
61 | |
62 } // namespace | |
63 | |
64 #endif | |
OLD | NEW |