1 //
2 // Copyright 2014 The ANGLE Project Authors. All rights reserved.
3 // Use of this source code is governed by a BSD-style license that can be
4 // found in the LICENSE file.
5 //
6
7 // queryconversions.cpp: Implementation of state query cast conversions
8
9 #include "libANGLE/queryconversions.h"
10
11 #include <vector>
12
13 #include "common/utilities.h"
14 #include "libANGLE/Context.h"
15
16 namespace gl
17 {
18
19 namespace
20 {
21
ExpandFloatToInteger(GLfloat value)22 GLint64 ExpandFloatToInteger(GLfloat value)
23 {
24 return static_cast<GLint64>((static_cast<double>(0xFFFFFFFFULL) * value - 1.0) / 2.0);
25 }
26
27 template <typename QueryT, typename NativeT>
28 QueryT CastFromStateValueToInt(GLenum pname, NativeT value)
29 {
30 GLenum nativeType = GLTypeToGLenum<NativeT>::value;
31
32 if (nativeType == GL_FLOAT)
33 {
34 // RGBA color values and DepthRangeF values are converted to integer using Equation 2.4 from
35 // Table 4.5
36 switch (pname)
37 {
38 case GL_DEPTH_RANGE:
39 case GL_COLOR_CLEAR_VALUE:
40 case GL_DEPTH_CLEAR_VALUE:
41 case GL_BLEND_COLOR:
42 // GLES1 emulation:
43 // Also, several GLES1.x values need to be converted to integer with
44 // ExpandFloatToInteger rather than rounding. See GLES 1.1 spec 6.1.2 "Data
45 // Conversions".
46 case GL_ALPHA_TEST_REF:
47 case GL_CURRENT_COLOR:
48 return clampCast<QueryT>(ExpandFloatToInteger(static_cast<GLfloat>(value)));
49 default:
50 return clampCast<QueryT>(std::round(value));
51 }
52 }
53
54 return clampCast<QueryT>(value);
55 }
56
57 template <typename NativeT, typename QueryT>
58 NativeT CastQueryValueToInt(GLenum pname, QueryT value)
59 {
60 GLenum queryType = GLTypeToGLenum<QueryT>::value;
61
62 if (queryType == GL_FLOAT)
63 {
64 // ARM devices cast float to uint differently than Intel.
65 // Basically, any negative floating point number becomes 0
66 // when converted to unsigned int. Instead, convert to a signed
67 // int and then convert to unsigned int to "preserve the value"
68 // E.g. common case for tests is to pass in -1 as an invalid query
69 // value. If cast to a unsigned int it becomes 0 (GL_NONE) and is now
70 // a valid enum and negative tests fail. But converting to int
71 // and then to final unsigned int gives us 4294967295 (0xffffffff)
72 // which is what we want.
73 return static_cast<NativeT>(static_cast<GLint64>(std::round(value)));
74 }
75
76 return static_cast<NativeT>(value);
77 }
78
79 } // anonymous namespace
80
CastMaskValue(GLuint value)81 GLint CastMaskValue(GLuint value)
82 {
83 return clampCast<GLint>(value);
84 }
85
86 template <typename QueryT, typename InternalT>
87 QueryT CastFromGLintStateValue(GLenum pname, InternalT value)
88 {
89 return CastFromStateValue<QueryT, GLint>(pname, clampCast<GLint, InternalT>(value));
90 }
91
92 template GLfloat CastFromGLintStateValue<GLfloat, GLenum>(GLenum pname, GLenum value);
93 template GLint CastFromGLintStateValue<GLint, GLenum>(GLenum pname, GLenum value);
94 template GLint64 CastFromGLintStateValue<GLint64, GLenum>(GLenum pname, GLenum value);
95 template GLuint CastFromGLintStateValue<GLuint, GLenum>(GLenum pname, GLenum value);
96 template GLuint CastFromGLintStateValue<GLuint, GLint>(GLenum pname, GLint value);
97 template GLfloat CastFromGLintStateValue<GLfloat, GLint>(GLenum pname, GLint value);
98 template GLint CastFromGLintStateValue<GLint, GLint>(GLenum pname, GLint value);
99 template GLfloat CastFromGLintStateValue<GLfloat, bool>(GLenum pname, bool value);
100 template GLuint CastFromGLintStateValue<GLuint, bool>(GLenum pname, bool value);
101 template GLint CastFromGLintStateValue<GLint, bool>(GLenum pname, bool value);
102
103 template <typename QueryT, typename NativeT>
104 QueryT CastFromStateValue(GLenum pname, NativeT value)
105 {
106 GLenum queryType = GLTypeToGLenum<QueryT>::value;
107
108 switch (queryType)
109 {
110 case GL_INT:
111 case GL_INT_64_ANGLEX:
112 case GL_UNSIGNED_INT:
113 case GL_UINT_64_ANGLEX:
114 return CastFromStateValueToInt<QueryT, NativeT>(pname, value);
115 case GL_FLOAT:
116 return static_cast<QueryT>(value);
117 case GL_BOOL:
118 return static_cast<QueryT>(value == static_cast<NativeT>(0) ? GL_FALSE : GL_TRUE);
119 default:
120 UNREACHABLE();
121 return 0;
122 }
123 }
124 template GLint CastFromStateValue<GLint, GLint>(GLenum pname, GLint value);
125 template GLint CastFromStateValue<GLint, GLint64>(GLenum pname, GLint64 value);
126 template GLint64 CastFromStateValue<GLint64, GLint>(GLenum pname, GLint value);
127 template GLint64 CastFromStateValue<GLint64, GLint64>(GLenum pname, GLint64 value);
128 template GLfloat CastFromStateValue<GLfloat, GLint>(GLenum pname, GLint value);
129 template GLfloat CastFromStateValue<GLfloat, GLuint>(GLenum pname, GLuint value);
130 template GLfloat CastFromStateValue<GLfloat, GLfloat>(GLenum pname, GLfloat value);
131 template GLint CastFromStateValue<GLint, GLfloat>(GLenum pname, GLfloat value);
132 template GLuint CastFromStateValue<GLuint, GLfloat>(GLenum pname, GLfloat value);
133 template GLuint CastFromStateValue<GLuint, GLint>(GLenum pname, GLint value);
134 template GLuint CastFromStateValue<GLuint, GLuint>(GLenum pname, GLuint value);
135 template GLint CastFromStateValue<GLint, GLboolean>(GLenum pname, GLboolean value);
136 template GLint64 CastFromStateValue<GLint64, GLboolean>(GLenum pname, GLboolean value);
137 template GLint CastFromStateValue<GLint, GLuint>(GLenum pname, GLuint value);
138 template GLint64 CastFromStateValue<GLint64, GLuint>(GLenum pname, GLuint value);
139 template GLuint64 CastFromStateValue<GLuint64, GLuint>(GLenum pname, GLuint value);
140
141 template <typename NativeT, typename QueryT>
142 NativeT CastQueryValueTo(GLenum pname, QueryT value)
143 {
144 GLenum nativeType = GLTypeToGLenum<NativeT>::value;
145
146 switch (nativeType)
147 {
148 case GL_INT:
149 case GL_INT_64_ANGLEX:
150 case GL_UNSIGNED_INT:
151 case GL_UINT_64_ANGLEX:
152 return CastQueryValueToInt<NativeT, QueryT>(pname, value);
153 case GL_FLOAT:
154 return static_cast<NativeT>(value);
155 case GL_BOOL:
156 return static_cast<NativeT>(value == static_cast<QueryT>(0) ? GL_FALSE : GL_TRUE);
157 default:
158 UNREACHABLE();
159 return 0;
160 }
161 }
162
163 template GLint CastQueryValueTo<GLint, GLfloat>(GLenum pname, GLfloat value);
164 template GLboolean CastQueryValueTo<GLboolean, GLint>(GLenum pname, GLint value);
165 template GLint CastQueryValueTo<GLint, GLint>(GLenum pname, GLint value);
166 template GLint CastQueryValueTo<GLint, GLuint>(GLenum pname, GLuint value);
167 template GLfloat CastQueryValueTo<GLfloat, GLint>(GLenum pname, GLint value);
168 template GLfloat CastQueryValueTo<GLfloat, GLuint>(GLenum pname, GLuint value);
169 template GLfloat CastQueryValueTo<GLfloat, GLfloat>(GLenum pname, GLfloat value);
170 template GLuint CastQueryValueTo<GLuint, GLint>(GLenum pname, GLint value);
171 template GLuint CastQueryValueTo<GLuint, GLuint>(GLenum pname, GLuint value);
172 template GLuint CastQueryValueTo<GLuint, GLfloat>(GLenum pname, GLfloat value);
173
174 template <typename QueryT>
CastStateValues(const Context * context,GLenum nativeType,GLenum pname,unsigned int numParams,QueryT * outParams)175 void CastStateValues(const Context *context,
176 GLenum nativeType,
177 GLenum pname,
178 unsigned int numParams,
179 QueryT *outParams)
180 {
181 if (nativeType == GL_INT)
182 {
183 std::vector<GLint> intParams(numParams, 0);
184 context->getIntegervImpl(pname, intParams.data());
185
186 for (unsigned int i = 0; i < numParams; ++i)
187 {
188 outParams[i] = CastFromStateValue<QueryT>(pname, intParams[i]);
189 }
190 }
191 else if (nativeType == GL_BOOL)
192 {
193 std::vector<GLboolean> boolParams(numParams, GL_FALSE);
194 context->getBooleanvImpl(pname, boolParams.data());
195
196 for (unsigned int i = 0; i < numParams; ++i)
197 {
198 outParams[i] =
199 (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
200 }
201 }
202 else if (nativeType == GL_FLOAT)
203 {
204 std::vector<GLfloat> floatParams(numParams, 0.0f);
205 context->getFloatvImpl(pname, floatParams.data());
206
207 for (unsigned int i = 0; i < numParams; ++i)
208 {
209 outParams[i] = CastFromStateValue<QueryT>(pname, floatParams[i]);
210 }
211 }
212 else if (nativeType == GL_INT_64_ANGLEX)
213 {
214 std::vector<GLint64> int64Params(numParams, 0);
215 context->getInteger64vImpl(pname, int64Params.data());
216
217 for (unsigned int i = 0; i < numParams; ++i)
218 {
219 outParams[i] = CastFromStateValue<QueryT>(pname, int64Params[i]);
220 }
221 }
222 else
223 UNREACHABLE();
224 }
225
226 // Explicit template instantiation (how we export template functions in different files)
227 // The calls below will make CastStateValues successfully link with the GL state query types
228 // The GL state query API types are: bool, int, uint, float, int64, uint64
229
230 template void CastStateValues<GLboolean>(const Context *,
231 GLenum,
232 GLenum,
233 unsigned int,
234 GLboolean *);
235 template void CastStateValues<GLint>(const Context *, GLenum, GLenum, unsigned int, GLint *);
236 template void CastStateValues<GLuint>(const Context *, GLenum, GLenum, unsigned int, GLuint *);
237 template void CastStateValues<GLfloat>(const Context *, GLenum, GLenum, unsigned int, GLfloat *);
238 template void CastStateValues<GLint64>(const Context *, GLenum, GLenum, unsigned int, GLint64 *);
239
240 template <typename QueryT>
CastIndexedStateValues(Context * context,GLenum nativeType,GLenum pname,GLuint index,unsigned int numParams,QueryT * outParams)241 void CastIndexedStateValues(Context *context,
242 GLenum nativeType,
243 GLenum pname,
244 GLuint index,
245 unsigned int numParams,
246 QueryT *outParams)
247 {
248 if (nativeType == GL_INT)
249 {
250 std::vector<GLint> intParams(numParams, 0);
251 context->getIntegeri_v(pname, index, intParams.data());
252
253 for (unsigned int i = 0; i < numParams; ++i)
254 {
255 outParams[i] = CastFromStateValue<QueryT>(pname, intParams[i]);
256 }
257 }
258 else if (nativeType == GL_BOOL)
259 {
260 std::vector<GLboolean> boolParams(numParams, GL_FALSE);
261 context->getBooleani_v(pname, index, boolParams.data());
262
263 for (unsigned int i = 0; i < numParams; ++i)
264 {
265 outParams[i] =
266 (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
267 }
268 }
269 else if (nativeType == GL_INT_64_ANGLEX)
270 {
271 std::vector<GLint64> int64Params(numParams, 0);
272 context->getInteger64i_v(pname, index, int64Params.data());
273
274 for (unsigned int i = 0; i < numParams; ++i)
275 {
276 outParams[i] = CastFromStateValue<QueryT>(pname, int64Params[i]);
277 }
278 }
279 else
280 UNREACHABLE();
281 }
282
283 template void CastIndexedStateValues<GLboolean>(Context *,
284 GLenum,
285 GLenum,
286 GLuint index,
287 unsigned int,
288 GLboolean *);
289 template void CastIndexedStateValues<GLint>(Context *,
290 GLenum,
291 GLenum,
292 GLuint index,
293 unsigned int,
294 GLint *);
295 template void CastIndexedStateValues<GLuint>(Context *,
296 GLenum,
297 GLenum,
298 GLuint index,
299 unsigned int,
300 GLuint *);
301 template void CastIndexedStateValues<GLfloat>(Context *,
302 GLenum,
303 GLenum,
304 GLuint index,
305 unsigned int,
306 GLfloat *);
307 template void CastIndexedStateValues<GLint64>(Context *,
308 GLenum,
309 GLenum,
310 GLuint index,
311 unsigned int,
312 GLint64 *);
313 } // namespace gl
314