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SkSLTypeShared.h
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1/*
2 * Copyright 2022 Google LLC
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 SkSLTypeShared_DEFINED
9#define SkSLTypeShared_DEFINED
10
11#include "include/core/SkTypes.h"
12
13/**
14 * Types of shader-language-specific boxed variables we can create.
15 */
16enum class SkSLType : char {
17 kVoid,
18 kBool,
19 kBool2,
20 kBool3,
21 kBool4,
22 kShort,
23 kShort2,
24 kShort3,
25 kShort4,
26 kUShort,
27 kUShort2,
28 kUShort3,
29 kUShort4,
30 kFloat,
31 kFloat2,
32 kFloat3,
33 kFloat4,
34 kFloat2x2,
35 kFloat3x3,
36 kFloat4x4,
37 kHalf,
38 kHalf2,
39 kHalf3,
40 kHalf4,
41 kHalf2x2,
42 kHalf3x3,
43 kHalf4x4,
44 kInt,
45 kInt2,
46 kInt3,
47 kInt4,
48 kUInt,
49 kUInt2,
50 kUInt3,
51 kUInt4,
52 kTexture2DSampler,
53 kTextureExternalSampler,
54 kTexture2DRectSampler,
55 kTexture2D,
56 kSampler,
57 kInput,
58
59 kLast = kInput
60};
61static const int kSkSLTypeCount = static_cast<int>(SkSLType::kLast) + 1;
62
63/** Returns the SkSL typename for this type. */
64const char* SkSLTypeString(SkSLType t);
65
66/** Is the shading language type float (including vectors/matrices)? */
67static constexpr bool SkSLTypeIsFloatType(SkSLType type) {
68 switch (type) {
69 case SkSLType::kFloat:
70 case SkSLType::kFloat2:
71 case SkSLType::kFloat3:
72 case SkSLType::kFloat4:
73 case SkSLType::kFloat2x2:
74 case SkSLType::kFloat3x3:
75 case SkSLType::kFloat4x4:
76 case SkSLType::kHalf:
77 case SkSLType::kHalf2:
78 case SkSLType::kHalf3:
79 case SkSLType::kHalf4:
80 case SkSLType::kHalf2x2:
81 case SkSLType::kHalf3x3:
82 case SkSLType::kHalf4x4:
83 return true;
84
85 case SkSLType::kVoid:
86 case SkSLType::kTexture2DSampler:
87 case SkSLType::kTextureExternalSampler:
88 case SkSLType::kTexture2DRectSampler:
89 case SkSLType::kBool:
90 case SkSLType::kBool2:
91 case SkSLType::kBool3:
92 case SkSLType::kBool4:
93 case SkSLType::kShort:
94 case SkSLType::kShort2:
95 case SkSLType::kShort3:
96 case SkSLType::kShort4:
97 case SkSLType::kUShort:
98 case SkSLType::kUShort2:
99 case SkSLType::kUShort3:
100 case SkSLType::kUShort4:
101 case SkSLType::kInt:
102 case SkSLType::kInt2:
103 case SkSLType::kInt3:
104 case SkSLType::kInt4:
105 case SkSLType::kUInt:
106 case SkSLType::kUInt2:
107 case SkSLType::kUInt3:
108 case SkSLType::kUInt4:
109 case SkSLType::kTexture2D:
110 case SkSLType::kSampler:
111 case SkSLType::kInput:
112 return false;
113 }
114 SkUNREACHABLE;
115}
116
117/** Is the shading language type integral (including vectors)? */
118static constexpr bool SkSLTypeIsIntegralType(SkSLType type) {
119 switch (type) {
120 case SkSLType::kShort:
121 case SkSLType::kShort2:
122 case SkSLType::kShort3:
123 case SkSLType::kShort4:
124 case SkSLType::kUShort:
125 case SkSLType::kUShort2:
126 case SkSLType::kUShort3:
127 case SkSLType::kUShort4:
128 case SkSLType::kInt:
129 case SkSLType::kInt2:
130 case SkSLType::kInt3:
131 case SkSLType::kInt4:
132 case SkSLType::kUInt:
133 case SkSLType::kUInt2:
134 case SkSLType::kUInt3:
135 case SkSLType::kUInt4:
136 return true;
137
138 case SkSLType::kFloat:
139 case SkSLType::kFloat2:
140 case SkSLType::kFloat3:
141 case SkSLType::kFloat4:
142 case SkSLType::kFloat2x2:
143 case SkSLType::kFloat3x3:
144 case SkSLType::kFloat4x4:
145 case SkSLType::kHalf:
146 case SkSLType::kHalf2:
147 case SkSLType::kHalf3:
148 case SkSLType::kHalf4:
149 case SkSLType::kHalf2x2:
150 case SkSLType::kHalf3x3:
151 case SkSLType::kHalf4x4:
152 case SkSLType::kVoid:
153 case SkSLType::kTexture2DSampler:
154 case SkSLType::kTextureExternalSampler:
155 case SkSLType::kTexture2DRectSampler:
156 case SkSLType::kBool:
157 case SkSLType::kBool2:
158 case SkSLType::kBool3:
159 case SkSLType::kBool4:
160 case SkSLType::kTexture2D:
161 case SkSLType::kSampler:
162 case SkSLType::kInput:
163 return false;
164 }
165 SkUNREACHABLE;
166}
167
168/** If the type represents a single value or vector return the vector length; otherwise, -1. */
169static constexpr int SkSLTypeVecLength(SkSLType type) {
170 switch (type) {
171 case SkSLType::kFloat:
172 case SkSLType::kHalf:
173 case SkSLType::kBool:
174 case SkSLType::kShort:
175 case SkSLType::kUShort:
176 case SkSLType::kInt:
177 case SkSLType::kUInt:
178 return 1;
179
180 case SkSLType::kFloat2:
181 case SkSLType::kHalf2:
182 case SkSLType::kBool2:
183 case SkSLType::kShort2:
184 case SkSLType::kUShort2:
185 case SkSLType::kInt2:
186 case SkSLType::kUInt2:
187 return 2;
188
189 case SkSLType::kFloat3:
190 case SkSLType::kHalf3:
191 case SkSLType::kBool3:
192 case SkSLType::kShort3:
193 case SkSLType::kUShort3:
194 case SkSLType::kInt3:
195 case SkSLType::kUInt3:
196 return 3;
197
198 case SkSLType::kFloat4:
199 case SkSLType::kHalf4:
200 case SkSLType::kBool4:
201 case SkSLType::kShort4:
202 case SkSLType::kUShort4:
203 case SkSLType::kInt4:
204 case SkSLType::kUInt4:
205 return 4;
206
207 case SkSLType::kFloat2x2:
208 case SkSLType::kFloat3x3:
209 case SkSLType::kFloat4x4:
210 case SkSLType::kHalf2x2:
211 case SkSLType::kHalf3x3:
212 case SkSLType::kHalf4x4:
213 case SkSLType::kVoid:
214 case SkSLType::kTexture2DSampler:
215 case SkSLType::kTextureExternalSampler:
216 case SkSLType::kTexture2DRectSampler:
217 case SkSLType::kTexture2D:
218 case SkSLType::kSampler:
219 case SkSLType::kInput:
220 return -1;
221 }
222 SkUNREACHABLE;
223}
224
225/**
226 * Is the shading language type supported as a uniform (ie, does it have a corresponding set
227 * function on GrGLSLProgramDataManager)?
228 */
229static constexpr bool SkSLTypeCanBeUniformValue(SkSLType type) {
230 // This is almost "IsFloatType || IsIntegralType" but excludes non-full precision int types.
231 switch(type) {
232 case SkSLType::kFloat:
233 case SkSLType::kFloat2:
234 case SkSLType::kFloat3:
235 case SkSLType::kFloat4:
236 case SkSLType::kFloat2x2:
237 case SkSLType::kFloat3x3:
238 case SkSLType::kFloat4x4:
239 case SkSLType::kHalf:
240 case SkSLType::kHalf2:
241 case SkSLType::kHalf3:
242 case SkSLType::kHalf4:
243 case SkSLType::kHalf2x2:
244 case SkSLType::kHalf3x3:
245 case SkSLType::kHalf4x4:
246
247 case SkSLType::kInt:
248 case SkSLType::kInt2:
249 case SkSLType::kInt3:
250 case SkSLType::kInt4:
251 case SkSLType::kUInt:
252 case SkSLType::kUInt2:
253 case SkSLType::kUInt3:
254 case SkSLType::kUInt4:
255 return true;
256
257 default:
258 return false;
259 }
260}
261
262/** Is the shading language type full precision? */
263bool SkSLTypeIsFullPrecisionNumericType(SkSLType type);
264
265/** If the type represents a square matrix, return its size; otherwise, -1. */
266int SkSLTypeMatrixSize(SkSLType type);
267
268/** If the type represents a square matrix, return its size; otherwise, -1. */
269bool SkSLTypeIsCombinedSamplerType(SkSLType type);
270
271#endif // SkSLTypeShared_DEFINED
SkUNREACHABLE
#define SkUNREACHABLE
Definition: SkAssert.h:135
SkSLTypeCanBeUniformValue
static constexpr bool SkSLTypeCanBeUniformValue(SkSLType type)
Definition: SkSLTypeShared.h:229
SkSLTypeIsIntegralType
static constexpr bool SkSLTypeIsIntegralType(SkSLType type)
Definition: SkSLTypeShared.h:118
SkSLTypeIsCombinedSamplerType
bool SkSLTypeIsCombinedSamplerType(SkSLType type)
Definition: SkSLTypeShared.cpp:165
SkSLTypeMatrixSize
int SkSLTypeMatrixSize(SkSLType type)
Definition: SkSLTypeShared.cpp:111
SkSLTypeIsFullPrecisionNumericType
bool SkSLTypeIsFullPrecisionNumericType(SkSLType type)
Definition: SkSLTypeShared.cpp:58
kSkSLTypeCount
static const int kSkSLTypeCount
Definition: SkSLTypeShared.h:61
SkSLType
SkSLType
Definition: SkSLTypeShared.h:16
SkSLType::kTextureExternalSampler
@ kTextureExternalSampler
SkSLType::kTexture2DSampler
@ kTexture2DSampler
SkSLType::kTexture2DRectSampler
@ kTexture2DRectSampler
SkSLTypeString
const char * SkSLTypeString(SkSLType t)
Definition: SkSLTypeShared.cpp:10
SkSLTypeIsFloatType
static constexpr bool SkSLTypeIsFloatType(SkSLType type)
Definition: SkSLTypeShared.h:67
SkSLTypeVecLength
static constexpr int SkSLTypeVecLength(SkSLType type)
Definition: SkSLTypeShared.h:169
type
GLenum type
Definition: blit_command_gles.cc:126
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