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
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
|
//
// Copyright 2015 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//
// VaryingPacking:
// Class which describes a mapping from varyings to registers, according
// to the spec, or using custom packing algorithms. We also keep a register
// allocation list for the D3D renderer.
//
#ifndef LIBANGLE_VARYINGPACKING_H_
#define LIBANGLE_VARYINGPACKING_H_
#include <GLSLANG/ShaderVars.h>
#include "angle_gl.h"
#include "common/angleutils.h"
#include <map>
namespace gl
{
class InfoLog;
struct ProgramVaryingRef;
using ProgramMergedVaryings = std::map<std::string, ProgramVaryingRef>;
struct PackedVarying
{
PackedVarying(const sh::ShaderVariable &varyingIn, sh::InterpolationType interpolationIn)
: PackedVarying(varyingIn, interpolationIn, "", false)
{}
PackedVarying(const sh::ShaderVariable &varyingIn,
sh::InterpolationType interpolationIn,
const std::string &parentStructNameIn,
GLuint fieldIndexIn)
: varying(&varyingIn),
vertexOnly(false),
interpolation(interpolationIn),
parentStructName(parentStructNameIn),
arrayIndex(GL_INVALID_INDEX),
fieldIndex(fieldIndexIn)
{}
bool isStructField() const { return !parentStructName.empty(); }
bool isArrayElement() const { return arrayIndex != GL_INVALID_INDEX; }
std::string fullName() const
{
std::stringstream fullNameStr;
if (isStructField())
{
fullNameStr << parentStructName << ".";
}
fullNameStr << varying->name;
if (arrayIndex != GL_INVALID_INDEX)
{
fullNameStr << "[" << arrayIndex << "]";
}
return fullNameStr.str();
}
const sh::ShaderVariable *varying;
// Transform feedback varyings can be only referenced in the VS.
bool vertexOnly;
// Cached so we can store sh::ShaderVariable to point to varying fields.
sh::InterpolationType interpolation;
// Struct name
std::string parentStructName;
GLuint arrayIndex;
// Field index in the struct. In Vulkan, this is used to assign a
// struct-typed varying location to the location of its first field.
GLuint fieldIndex;
};
struct PackedVaryingRegister final
{
PackedVaryingRegister()
: packedVarying(nullptr),
varyingArrayIndex(0),
varyingRowIndex(0),
registerRow(0),
registerColumn(0)
{}
PackedVaryingRegister(const PackedVaryingRegister &) = default;
PackedVaryingRegister &operator=(const PackedVaryingRegister &) = default;
bool operator<(const PackedVaryingRegister &other) const
{
return sortOrder() < other.sortOrder();
}
unsigned int sortOrder() const
{
// TODO(jmadill): Handle interpolation types
return registerRow * 4 + registerColumn;
}
std::string tfVaryingName() const
{
if (packedVarying->isArrayElement() || packedVarying->isStructField())
{
return packedVarying->fullName();
}
else
{
return packedVarying->varying->name;
}
}
// Index to the array of varyings.
const PackedVarying *packedVarying;
// The array element of the packed varying.
unsigned int varyingArrayIndex;
// The row of the array element of the packed varying.
unsigned int varyingRowIndex;
// The register row to which we've assigned this packed varying.
unsigned int registerRow;
// The column of the register row into which we've packed this varying.
unsigned int registerColumn;
};
// Supported packing modes:
enum class PackMode
{
// We treat mat2 arrays as taking two full rows.
WEBGL_STRICT,
// We allow mat2 to take a 2x2 chunk.
ANGLE_RELAXED,
// Each varying takes a separate register. No register sharing.
ANGLE_NON_CONFORMANT_D3D9,
};
class VaryingPacking final : angle::NonCopyable
{
public:
VaryingPacking(GLuint maxVaryingVectors, PackMode packMode);
~VaryingPacking();
bool packUserVaryings(gl::InfoLog &infoLog, const std::vector<PackedVarying> &packedVaryings);
bool collectAndPackUserVaryings(gl::InfoLog &infoLog,
const ProgramMergedVaryings &mergedVaryings,
const std::vector<std::string> &tfVaryings);
struct Register
{
Register() { data[0] = data[1] = data[2] = data[3] = false; }
bool &operator[](unsigned int index) { return data[index]; }
bool operator[](unsigned int index) const { return data[index]; }
bool data[4];
};
Register &operator[](unsigned int index) { return mRegisterMap[index]; }
const Register &operator[](unsigned int index) const { return mRegisterMap[index]; }
const std::vector<PackedVaryingRegister> &getRegisterList() const { return mRegisterList; }
unsigned int getMaxSemanticIndex() const
{
return static_cast<unsigned int>(mRegisterList.size());
}
const std::vector<std::string> &getInactiveVaryingNames() const
{
return mInactiveVaryingNames;
}
private:
bool packVarying(const PackedVarying &packedVarying);
bool isFree(unsigned int registerRow,
unsigned int registerColumn,
unsigned int varyingRows,
unsigned int varyingColumns) const;
void insert(unsigned int registerRow,
unsigned int registerColumn,
const PackedVarying &packedVarying);
std::vector<Register> mRegisterMap;
std::vector<PackedVaryingRegister> mRegisterList;
std::vector<PackedVarying> mPackedVaryings;
std::vector<std::string> mInactiveVaryingNames;
PackMode mPackMode;
};
} // namespace gl
#endif // LIBANGLE_VARYINGPACKING_H_
|
