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_FLOATLITERAL |
9 | #define SKSL_FLOATLITERAL |
10 | |
11 | #include "src/sksl/SkSLContext.h" |
12 | #include "src/sksl/ir/SkSLExpression.h" |
13 | |
14 | namespace SkSL { |
15 | |
16 | /** |
17 | * A literal floating point number. |
18 | */ |
19 | struct FloatLiteral : public Expression { |
20 | FloatLiteral(const Context& context, int offset, double value) |
21 | : INHERITED(offset, kFloatLiteral_Kind, *context.fFloatLiteral_Type) |
22 | , fValue(value) {} |
23 | |
24 | FloatLiteral(int offset, double value, const Type* type) |
25 | : INHERITED(offset, kFloatLiteral_Kind, *type) |
26 | , fValue(value) {} |
27 | |
28 | #ifdef SK_DEBUG |
29 | String description() const override { |
30 | return to_string(fValue); |
31 | } |
32 | #endif |
33 | |
34 | bool hasProperty(Property property) const override { |
35 | return false; |
36 | } |
37 | |
38 | bool isConstant() const override { |
39 | return true; |
40 | } |
41 | |
42 | int coercionCost(const Type& target) const override { |
43 | if (target.isFloat()) { |
44 | return 0; |
45 | } |
46 | return INHERITED::coercionCost(target); |
47 | } |
48 | |
49 | bool compareConstant(const Context& context, const Expression& other) const override { |
50 | FloatLiteral& f = (FloatLiteral&) other; |
51 | return fValue == f.fValue; |
52 | } |
53 | |
54 | double getConstantFloat() const override { |
55 | return fValue; |
56 | } |
57 | |
58 | std::unique_ptr<Expression> clone() const override { |
59 | return std::unique_ptr<Expression>(new FloatLiteral(fOffset, fValue, &fType)); |
60 | } |
61 | |
62 | const double fValue; |
63 | |
64 | typedef Expression INHERITED; |
65 | }; |
66 | |
67 | } // namespace |
68 | |
69 | #endif |
70 | |