1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
|
/*
* Copyright 2016 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SKSL_CONSTRUCTOR
#define SKSL_CONSTRUCTOR
#include "SkSLExpression.h"
#include "SkSLFloatLiteral.h"
#include "SkSLIntLiteral.h"
#include "SkSLIRGenerator.h"
namespace SkSL {
/**
* Represents the construction of a compound type, such as "vec2(x, y)".
*
* Vector constructors will always consist of either exactly 1 scalar, or a collection of vectors
* and scalars totalling exactly the right number of scalar components.
*
* Matrix constructors will always consist of either exactly 1 scalar, exactly 1 matrix, or a
* collection of vectors and scalars totalling exactly the right number of scalar components.
*/
struct Constructor : public Expression {
Constructor(Position position, const Type& type,
std::vector<std::unique_ptr<Expression>> arguments)
: INHERITED(position, kConstructor_Kind, type)
, fArguments(std::move(arguments)) {}
virtual std::unique_ptr<Expression> constantPropagate(
const IRGenerator& irGenerator,
const DefinitionMap& definitions) override {
if (fArguments.size() == 1 && fArguments[0]->fKind == Expression::kIntLiteral_Kind &&
// promote float(1) to 1.0
fType == *irGenerator.fContext.fFloat_Type) {
int64_t intValue = ((IntLiteral&) *fArguments[0]).fValue;
return std::unique_ptr<Expression>(new FloatLiteral(irGenerator.fContext,
fPosition,
intValue));
}
return nullptr;
}
SkString description() const override {
SkString result = fType.description() + "(";
SkString separator;
for (size_t i = 0; i < fArguments.size(); i++) {
result += separator;
result += fArguments[i]->description();
separator = ", ";
}
result += ")";
return result;
}
bool isConstant() const override {
for (size_t i = 0; i < fArguments.size(); i++) {
if (!fArguments[i]->isConstant()) {
return false;
}
}
return true;
}
std::vector<std::unique_ptr<Expression>> fArguments;
typedef Expression INHERITED;
};
} // namespace
#endif
|
