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
103 template <typename QueryT, typename NativeT>
CastFromStateValue(GLenum pname,NativeT value)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>
CastQueryValueTo(GLenum pname,QueryT value)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 {
224 WARN() << "Application querying parameter that does not exist.";
225 }
226 }
227
228 // Explicit template instantiation (how we export template functions in different files)
229 // The calls below will make CastStateValues successfully link with the GL state query types
230 // The GL state query API types are: bool, int, uint, float, int64, uint64
231
232 template void CastStateValues<GLboolean>(const Context *,
233 GLenum,
234 GLenum,
235 unsigned int,
236 GLboolean *);
237 template void CastStateValues<GLint>(const Context *, GLenum, GLenum, unsigned int, GLint *);
238 template void CastStateValues<GLuint>(const Context *, GLenum, GLenum, unsigned int, GLuint *);
239 template void CastStateValues<GLfloat>(const Context *, GLenum, GLenum, unsigned int, GLfloat *);
240 template void CastStateValues<GLint64>(const Context *, GLenum, GLenum, unsigned int, GLint64 *);
241
242 template <typename QueryT>
CastIndexedStateValues(Context * context,GLenum nativeType,GLenum pname,GLuint index,unsigned int numParams,QueryT * outParams)243 void CastIndexedStateValues(Context *context,
244 GLenum nativeType,
245 GLenum pname,
246 GLuint index,
247 unsigned int numParams,
248 QueryT *outParams)
249 {
250 if (nativeType == GL_INT)
251 {
252 std::vector<GLint> intParams(numParams, 0);
253 context->getIntegeri_v(pname, index, intParams.data());
254
255 for (unsigned int i = 0; i < numParams; ++i)
256 {
257 outParams[i] = CastFromStateValue<QueryT>(pname, intParams[i]);
258 }
259 }
260 else if (nativeType == GL_BOOL)
261 {
262 std::vector<GLboolean> boolParams(numParams, GL_FALSE);
263 context->getBooleani_v(pname, index, boolParams.data());
264
265 for (unsigned int i = 0; i < numParams; ++i)
266 {
267 outParams[i] =
268 (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
269 }
270 }
271 else if (nativeType == GL_INT_64_ANGLEX)
272 {
273 std::vector<GLint64> int64Params(numParams, 0);
274 context->getInteger64i_v(pname, index, int64Params.data());
275
276 for (unsigned int i = 0; i < numParams; ++i)
277 {
278 outParams[i] = CastFromStateValue<QueryT>(pname, int64Params[i]);
279 }
280 }
281 else
282 UNREACHABLE();
283 }
284
285 template void CastIndexedStateValues<GLboolean>(Context *,
286 GLenum,
287 GLenum,
288 GLuint index,
289 unsigned int,
290 GLboolean *);
291 template void CastIndexedStateValues<GLint>(Context *,
292 GLenum,
293 GLenum,
294 GLuint index,
295 unsigned int,
296 GLint *);
297 template void CastIndexedStateValues<GLuint>(Context *,
298 GLenum,
299 GLenum,
300 GLuint index,
301 unsigned int,
302 GLuint *);
303 template void CastIndexedStateValues<GLfloat>(Context *,
304 GLenum,
305 GLenum,
306 GLuint index,
307 unsigned int,
308 GLfloat *);
309 template void CastIndexedStateValues<GLint64>(Context *,
310 GLenum,
311 GLenum,
312 GLuint index,
313 unsigned int,
314 GLint64 *);
315 } // namespace gl
316