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
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
/*
* 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_PROGRAM
#define SKSL_PROGRAM
#include <vector>
#include <memory>
#include "SkSLBoolLiteral.h"
#include "SkSLExpression.h"
#include "SkSLIntLiteral.h"
#include "SkSLModifiers.h"
#include "SkSLProgramElement.h"
#include "SkSLSymbolTable.h"
// name of the render target height uniform
#define SKSL_RTHEIGHT_NAME "u_skRTHeight"
namespace SkSL {
class Context;
/**
* Represents a fully-digested program, ready for code generation.
*/
struct Program {
struct Settings {
struct Value {
Value(bool b)
: fKind(kBool_Kind)
, fValue(b) {}
Value(int i)
: fKind(kInt_Kind)
, fValue(i) {}
std::unique_ptr<Expression> literal(const Context& context, int offset) const {
switch (fKind) {
case Program::Settings::Value::kBool_Kind:
return std::unique_ptr<Expression>(new BoolLiteral(context,
offset,
fValue));
case Program::Settings::Value::kInt_Kind:
return std::unique_ptr<Expression>(new IntLiteral(context,
offset,
fValue));
default:
ASSERT(false);
return nullptr;
}
}
enum {
kBool_Kind,
kInt_Kind,
} fKind;
int fValue;
};
#ifdef SKSL_STANDALONE
const StandaloneShaderCaps* fCaps = &standaloneCaps;
#else
const GrShaderCaps* fCaps = nullptr;
#endif
// if false, sk_FragCoord is exactly the same as gl_FragCoord. If true, the y coordinate
// must be flipped.
bool fFlipY = false;
// If true the destination fragment color is read sk_FragColor. It must be declared inout.
bool fFragColorIsInOut = false;
// if true, Setting objects (e.g. sk_Caps.fbFetchSupport) should be replaced with their
// constant equivalents during compilation
bool fReplaceSettings = true;
// if true, all halfs are forced to be floats
bool fForceHighPrecision = false;
// if true, add -0.5 bias to LOD of all texture lookups
bool fSharpenTextures = false;
std::unordered_map<String, Value> fArgs;
};
struct Inputs {
// if true, this program requires the render target height uniform to be defined
bool fRTHeight;
// if true, this program must be recompiled if the flipY setting changes. If false, the
// program will compile to the same code regardless of the flipY setting.
bool fFlipY;
void reset() {
fRTHeight = false;
fFlipY = false;
}
bool isEmpty() {
return !fRTHeight && !fFlipY;
}
};
enum Kind {
kFragment_Kind,
kVertex_Kind,
kGeometry_Kind,
kFragmentProcessor_Kind,
kCPU_Kind
};
Program(Kind kind,
std::unique_ptr<String> source,
Settings settings,
std::shared_ptr<Context> context,
std::vector<std::unique_ptr<ProgramElement>> elements,
std::shared_ptr<SymbolTable> symbols,
Inputs inputs)
: fKind(kind)
, fSource(std::move(source))
, fSettings(settings)
, fContext(context)
, fSymbols(symbols)
, fElements(std::move(elements))
, fInputs(inputs) {}
Kind fKind;
std::unique_ptr<String> fSource;
Settings fSettings;
std::shared_ptr<Context> fContext;
// it's important to keep fElements defined after (and thus destroyed before) fSymbols,
// because destroying elements can modify reference counts in symbols
std::shared_ptr<SymbolTable> fSymbols;
std::vector<std::unique_ptr<ProgramElement>> fElements;
Inputs fInputs;
};
} // namespace
#endif
|
