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
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/*
* Copyright 2011 Google Inc.
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef GrGLShaderVar_DEFINED
#define GrGLShaderVar_DEFINED
#include "GrGLContext.h"
#include "GrGLSL.h"
#include "GrShaderVar.h"
#define USE_UNIFORM_FLOAT_ARRAYS true
/**
* Represents a variable in a shader
*/
class GrGLShaderVar : public GrShaderVar {
public:
/**
* See GL_ARB_fragment_coord_conventions.
*/
enum Origin {
kDefault_Origin, // when set to kDefault the origin field is ignored.
kUpperLeft_Origin, // only used to declare vec4 in gl_FragCoord.
};
/**
* Defaults to a float with no precision specifier
*/
GrGLShaderVar()
: GrShaderVar()
, fOrigin(kDefault_Origin)
, fUseUniformFloatArrays(USE_UNIFORM_FLOAT_ARRAYS) {
}
GrGLShaderVar(const char* name, GrSLType type, int arrayCount = kNonArray,
GrSLPrecision precision = kDefault_GrSLPrecision)
: GrShaderVar(name, type, arrayCount, precision)
, fOrigin(kDefault_Origin)
, fUseUniformFloatArrays(USE_UNIFORM_FLOAT_ARRAYS) {
SkASSERT(kVoid_GrSLType != type);
fOrigin = kDefault_Origin;
fUseUniformFloatArrays = USE_UNIFORM_FLOAT_ARRAYS;
}
GrGLShaderVar(const char* name, GrSLType type, TypeModifier typeModifier,
int arrayCount = kNonArray, GrSLPrecision precision = kDefault_GrSLPrecision)
: GrShaderVar(name, type, typeModifier, arrayCount, precision)
, fOrigin(kDefault_Origin)
, fUseUniformFloatArrays(USE_UNIFORM_FLOAT_ARRAYS) {
SkASSERT(kVoid_GrSLType != type);
}
GrGLShaderVar(const GrShaderVar& var)
: GrShaderVar(var)
, fOrigin(kDefault_Origin)
, fUseUniformFloatArrays(USE_UNIFORM_FLOAT_ARRAYS) {
SkASSERT(kVoid_GrSLType != var.getType());
}
GrGLShaderVar(const GrGLShaderVar& var)
: GrShaderVar(var.c_str(), var.getType(), var.getTypeModifier(),
var.getArrayCount(), var.getPrecision())
, fOrigin(var.fOrigin)
, fUseUniformFloatArrays(var.fUseUniformFloatArrays) {
SkASSERT(kVoid_GrSLType != var.getType());
}
/**
* Values for array count that have special meaning. We allow 1-sized arrays.
*/
enum {
kNonArray = 0, // not an array
kUnsizedArray = -1, // an unsized array (declared with [])
};
/**
* Sets as a non-array.
*/
void set(GrSLType type,
TypeModifier typeModifier,
const SkString& name,
GrSLPrecision precision = kDefault_GrSLPrecision,
Origin origin = kDefault_Origin,
bool useUniformFloatArrays = USE_UNIFORM_FLOAT_ARRAYS) {
SkASSERT(kVoid_GrSLType != type);
SkASSERT(kDefault_GrSLPrecision == precision || GrSLTypeIsFloatType(type));
INHERITED::set(type, name, typeModifier, precision);
fOrigin = origin;
fUseUniformFloatArrays = useUniformFloatArrays;
}
/**
* Sets as a non-array.
*/
void set(GrSLType type,
TypeModifier typeModifier,
const char* name,
GrSLPrecision precision = kDefault_GrSLPrecision,
Origin origin = kDefault_Origin,
bool useUniformFloatArrays = USE_UNIFORM_FLOAT_ARRAYS) {
SkASSERT(kVoid_GrSLType != type);
SkASSERT(kDefault_GrSLPrecision == precision || GrSLTypeIsFloatType(type));
INHERITED::set(type, name, typeModifier, precision);
fOrigin = origin;
fUseUniformFloatArrays = useUniformFloatArrays;
}
/**
* Set all var options
*/
void set(GrSLType type,
TypeModifier typeModifier,
const SkString& name,
int count,
GrSLPrecision precision = kDefault_GrSLPrecision,
Origin origin = kDefault_Origin,
bool useUniformFloatArrays = USE_UNIFORM_FLOAT_ARRAYS) {
SkASSERT(kVoid_GrSLType != type);
SkASSERT(kDefault_GrSLPrecision == precision || GrSLTypeIsFloatType(type));
INHERITED::set(type, name, typeModifier, precision, count);
fOrigin = origin;
fUseUniformFloatArrays = useUniformFloatArrays;
}
/**
* Set all var options
*/
void set(GrSLType type,
TypeModifier typeModifier,
const char* name,
int count,
GrSLPrecision precision = kDefault_GrSLPrecision,
Origin origin = kDefault_Origin,
bool useUniformFloatArrays = USE_UNIFORM_FLOAT_ARRAYS) {
SkASSERT(kVoid_GrSLType != type);
SkASSERT(kDefault_GrSLPrecision == precision || GrSLTypeIsFloatType(type));
INHERITED::set(type, name, typeModifier, precision, count);
fOrigin = origin;
fUseUniformFloatArrays = useUniformFloatArrays;
}
/**
* Get the origin of the var
*/
Origin getOrigin() const { return fOrigin; }
/**
* Set the origin of the var
*/
void setOrigin(Origin origin) { fOrigin = origin; }
/**
* Write a declaration of this variable to out.
*/
void appendDecl(const GrGLContextInfo& ctxInfo, SkString* out) const {
SkASSERT(kDefault_GrSLPrecision == fPrecision || GrSLTypeIsFloatType(fType));
if (kUpperLeft_Origin == fOrigin) {
// this is the only place where we specify a layout modifier. If we use other layout
// modifiers in the future then they should be placed in a list.
out->append("layout(origin_upper_left) ");
}
if (this->getTypeModifier() != kNone_TypeModifier) {
out->append(TypeModifierString(this->getTypeModifier(), ctxInfo.glslGeneration()));
out->append(" ");
}
out->append(PrecisionString(fPrecision, ctxInfo.standard()));
GrSLType effectiveType = this->getType();
if (this->isArray()) {
if (this->isUnsizedArray()) {
out->appendf("%s %s[]",
GrGLSLTypeString(effectiveType),
this->getName().c_str());
} else {
SkASSERT(this->getArrayCount() > 0);
out->appendf("%s %s[%d]",
GrGLSLTypeString(effectiveType),
this->getName().c_str(),
this->getArrayCount());
}
} else {
out->appendf("%s %s",
GrGLSLTypeString(effectiveType),
this->getName().c_str());
}
}
void appendArrayAccess(int index, SkString* out) const {
out->appendf("%s[%d]%s",
this->getName().c_str(),
index,
fUseUniformFloatArrays ? "" : ".x");
}
void appendArrayAccess(const char* indexName, SkString* out) const {
out->appendf("%s[%s]%s",
this->getName().c_str(),
indexName,
fUseUniformFloatArrays ? "" : ".x");
}
static const char* PrecisionString(GrSLPrecision p, GrGLStandard standard) {
// Desktop GLSL has added precision qualifiers but they don't do anything.
if (kGLES_GrGLStandard == standard) {
switch (p) {
case kLow_GrSLPrecision:
return "lowp ";
case kMedium_GrSLPrecision:
return "mediump ";
case kHigh_GrSLPrecision:
return "highp ";
default:
SkFAIL("Unexpected precision type.");
}
}
return "";
}
private:
static const char* TypeModifierString(TypeModifier t, GrGLSLGeneration gen) {
switch (t) {
case kNone_TypeModifier:
return "";
case kIn_TypeModifier:
return "in";
case kInOut_TypeModifier:
return "inout";
case kOut_TypeModifier:
return "out";
case kUniform_TypeModifier:
return "uniform";
case kAttribute_TypeModifier:
return k110_GrGLSLGeneration == gen ? "attribute" : "in";
case kVaryingIn_TypeModifier:
return k110_GrGLSLGeneration == gen ? "varying" : "in";
case kVaryingOut_TypeModifier:
return k110_GrGLSLGeneration == gen ? "varying" : "out";
default:
SkFAIL("Unknown shader variable type modifier.");
return ""; // suppress warning
}
}
Origin fOrigin;
/// Work around driver bugs on some hardware that don't correctly
/// support uniform float []
bool fUseUniformFloatArrays;
typedef GrShaderVar INHERITED;
};
#endif
|
