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>
CastFromStateValueToInt(GLenum pname,NativeT value)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>
CastQueryValueToInt(GLenum pname,QueryT value)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>
CastFromGLintStateValue(GLenum pname,InternalT value)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 template GLfloat CastFromGLintStateValue<GLfloat, GLfloat>(GLenum pname, GLfloat value);
103 template GLint CastFromGLintStateValue<GLint, GLfloat>(GLenum pname, GLfloat value);
104 template GLuint CastFromGLintStateValue<GLuint, GLfloat>(GLenum pname, GLfloat value);
105
106 template <typename QueryT, typename NativeT>
CastFromStateValue(GLenum pname,NativeT value)107 QueryT CastFromStateValue(GLenum pname, NativeT value)
108 {
109 GLenum queryType = GLTypeToGLenum<QueryT>::value;
110
111 switch (queryType)
112 {
113 case GL_INT:
114 case GL_INT_64_ANGLEX:
115 case GL_UNSIGNED_INT:
116 case GL_UINT_64_ANGLEX:
117 return CastFromStateValueToInt<QueryT, NativeT>(pname, value);
118 case GL_FLOAT:
119 return static_cast<QueryT>(value);
120 case GL_BOOL:
121 return static_cast<QueryT>(value == static_cast<NativeT>(0) ? GL_FALSE : GL_TRUE);
122 default:
123 UNREACHABLE();
124 return 0;
125 }
126 }
127 template GLint CastFromStateValue<GLint, GLint>(GLenum pname, GLint value);
128 template GLint CastFromStateValue<GLint, GLint64>(GLenum pname, GLint64 value);
129 template GLint64 CastFromStateValue<GLint64, GLint>(GLenum pname, GLint value);
130 template GLint64 CastFromStateValue<GLint64, GLint64>(GLenum pname, GLint64 value);
131 template GLfloat CastFromStateValue<GLfloat, GLint>(GLenum pname, GLint value);
132 template GLfloat CastFromStateValue<GLfloat, GLuint>(GLenum pname, GLuint value);
133 template GLfloat CastFromStateValue<GLfloat, GLfloat>(GLenum pname, GLfloat value);
134 template GLint CastFromStateValue<GLint, GLfloat>(GLenum pname, GLfloat value);
135 template GLuint CastFromStateValue<GLuint, GLfloat>(GLenum pname, GLfloat value);
136 template GLuint CastFromStateValue<GLuint, GLint>(GLenum pname, GLint value);
137 template GLuint CastFromStateValue<GLuint, GLuint>(GLenum pname, GLuint value);
138 template GLint CastFromStateValue<GLint, GLboolean>(GLenum pname, GLboolean value);
139 template GLint64 CastFromStateValue<GLint64, GLboolean>(GLenum pname, GLboolean value);
140 template GLint CastFromStateValue<GLint, GLuint>(GLenum pname, GLuint value);
141 template GLint64 CastFromStateValue<GLint64, GLuint>(GLenum pname, GLuint value);
142 template GLuint64 CastFromStateValue<GLuint64, GLuint>(GLenum pname, GLuint value);
143
144 template <typename NativeT, typename QueryT>
CastQueryValueTo(GLenum pname,QueryT value)145 NativeT CastQueryValueTo(GLenum pname, QueryT value)
146 {
147 GLenum nativeType = GLTypeToGLenum<NativeT>::value;
148
149 switch (nativeType)
150 {
151 case GL_INT:
152 case GL_INT_64_ANGLEX:
153 case GL_UNSIGNED_INT:
154 case GL_UINT_64_ANGLEX:
155 return CastQueryValueToInt<NativeT, QueryT>(pname, value);
156 case GL_FLOAT:
157 return static_cast<NativeT>(value);
158 case GL_BOOL:
159 return static_cast<NativeT>(value == static_cast<QueryT>(0) ? GL_FALSE : GL_TRUE);
160 default:
161 UNREACHABLE();
162 return 0;
163 }
164 }
165
166 template GLint CastQueryValueTo<GLint, GLfloat>(GLenum pname, GLfloat value);
167 template GLboolean CastQueryValueTo<GLboolean, GLint>(GLenum pname, GLint value);
168 template GLint CastQueryValueTo<GLint, GLint>(GLenum pname, GLint value);
169 template GLint CastQueryValueTo<GLint, GLuint>(GLenum pname, GLuint value);
170 template GLfloat CastQueryValueTo<GLfloat, GLint>(GLenum pname, GLint value);
171 template GLfloat CastQueryValueTo<GLfloat, GLuint>(GLenum pname, GLuint value);
172 template GLfloat CastQueryValueTo<GLfloat, GLfloat>(GLenum pname, GLfloat value);
173 template GLuint CastQueryValueTo<GLuint, GLint>(GLenum pname, GLint value);
174 template GLuint CastQueryValueTo<GLuint, GLuint>(GLenum pname, GLuint value);
175 template GLuint CastQueryValueTo<GLuint, GLfloat>(GLenum pname, GLfloat value);
176
177 template <typename QueryT>
CastStateValues(const Context * context,GLenum nativeType,GLenum pname,unsigned int numParams,QueryT * outParams)178 void CastStateValues(const Context *context,
179 GLenum nativeType,
180 GLenum pname,
181 unsigned int numParams,
182 QueryT *outParams)
183 {
184 if (nativeType == GL_INT)
185 {
186 std::vector<GLint> intParams(numParams, 0);
187 context->getIntegervImpl(pname, intParams.data());
188
189 for (unsigned int i = 0; i < numParams; ++i)
190 {
191 outParams[i] = CastFromStateValue<QueryT>(pname, intParams[i]);
192 }
193 }
194 else if (nativeType == GL_BOOL)
195 {
196 std::vector<GLboolean> boolParams(numParams, GL_FALSE);
197 context->getBooleanvImpl(pname, boolParams.data());
198
199 for (unsigned int i = 0; i < numParams; ++i)
200 {
201 outParams[i] =
202 (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
203 }
204 }
205 else if (nativeType == GL_FLOAT)
206 {
207 std::vector<GLfloat> floatParams(numParams, 0.0f);
208 context->getFloatvImpl(pname, floatParams.data());
209
210 for (unsigned int i = 0; i < numParams; ++i)
211 {
212 outParams[i] = CastFromStateValue<QueryT>(pname, floatParams[i]);
213 }
214 }
215 else if (nativeType == GL_INT_64_ANGLEX)
216 {
217 std::vector<GLint64> int64Params(numParams, 0);
218 context->getInteger64vImpl(pname, int64Params.data());
219
220 for (unsigned int i = 0; i < numParams; ++i)
221 {
222 outParams[i] = CastFromStateValue<QueryT>(pname, int64Params[i]);
223 }
224 }
225 else
226 {
227 WARN() << "Application querying parameter that does not exist.";
228 }
229 }
230
231 // Explicit template instantiation (how we export template functions in different files)
232 // The calls below will make CastStateValues successfully link with the GL state query types
233 // The GL state query API types are: bool, int, uint, float, int64, uint64
234
235 template void CastStateValues<GLboolean>(const Context *,
236 GLenum,
237 GLenum,
238 unsigned int,
239 GLboolean *);
240 template void CastStateValues<GLint>(const Context *, GLenum, GLenum, unsigned int, GLint *);
241 template void CastStateValues<GLuint>(const Context *, GLenum, GLenum, unsigned int, GLuint *);
242 template void CastStateValues<GLfloat>(const Context *, GLenum, GLenum, unsigned int, GLfloat *);
243 template void CastStateValues<GLint64>(const Context *, GLenum, GLenum, unsigned int, GLint64 *);
244
245 template <typename QueryT>
CastIndexedStateValues(Context * context,GLenum nativeType,GLenum pname,GLuint index,unsigned int numParams,QueryT * outParams)246 void CastIndexedStateValues(Context *context,
247 GLenum nativeType,
248 GLenum pname,
249 GLuint index,
250 unsigned int numParams,
251 QueryT *outParams)
252 {
253 if (nativeType == GL_INT)
254 {
255 std::vector<GLint> intParams(numParams, 0);
256 context->getIntegeri_v(pname, index, intParams.data());
257
258 for (unsigned int i = 0; i < numParams; ++i)
259 {
260 outParams[i] = CastFromStateValue<QueryT>(pname, intParams[i]);
261 }
262 }
263 else if (nativeType == GL_BOOL)
264 {
265 std::vector<GLboolean> boolParams(numParams, GL_FALSE);
266 context->getBooleani_v(pname, index, boolParams.data());
267
268 for (unsigned int i = 0; i < numParams; ++i)
269 {
270 outParams[i] =
271 (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
272 }
273 }
274 else if (nativeType == GL_INT_64_ANGLEX)
275 {
276 std::vector<GLint64> int64Params(numParams, 0);
277 context->getInteger64i_v(pname, index, int64Params.data());
278
279 for (unsigned int i = 0; i < numParams; ++i)
280 {
281 outParams[i] = CastFromStateValue<QueryT>(pname, int64Params[i]);
282 }
283 }
284 else
285 UNREACHABLE();
286 }
287
288 template void CastIndexedStateValues<GLboolean>(Context *,
289 GLenum,
290 GLenum,
291 GLuint index,
292 unsigned int,
293 GLboolean *);
294 template void CastIndexedStateValues<GLint>(Context *,
295 GLenum,
296 GLenum,
297 GLuint index,
298 unsigned int,
299 GLint *);
300 template void CastIndexedStateValues<GLuint>(Context *,
301 GLenum,
302 GLenum,
303 GLuint index,
304 unsigned int,
305 GLuint *);
306 template void CastIndexedStateValues<GLfloat>(Context *,
307 GLenum,
308 GLenum,
309 GLuint index,
310 unsigned int,
311 GLfloat *);
312 template void CastIndexedStateValues<GLint64>(Context *,
313 GLenum,
314 GLenum,
315 GLuint index,
316 unsigned int,
317 GLint64 *);
318 } // namespace gl
319