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 QueryT, typename NativeT>
CastFromStateValueToFloat(GLenum pname,NativeT value)58 QueryT CastFromStateValueToFloat(GLenum pname, NativeT value)
59 {
60 switch (pname)
61 {
62 // For mask values, their floating-point values should be positive, not -1.
63 case GL_STENCIL_VALUE_MASK:
64 case GL_STENCIL_BACK_VALUE_MASK:
65 case GL_STENCIL_WRITEMASK:
66 case GL_STENCIL_BACK_WRITEMASK:
67 return static_cast<QueryT>(static_cast<GLuint>(value));
68 default:
69 return static_cast<QueryT>(value);
70 }
71 }
72
73 template <typename NativeT, typename QueryT>
CastQueryValueToInt(GLenum pname,QueryT value)74 NativeT CastQueryValueToInt(GLenum pname, QueryT value)
75 {
76 GLenum queryType = GLTypeToGLenum<QueryT>::value;
77
78 if (queryType == GL_FLOAT)
79 {
80 // ARM devices cast float to uint differently than Intel.
81 // Basically, any negative floating point number becomes 0
82 // when converted to unsigned int. Instead, convert to a signed
83 // int and then convert to unsigned int to "preserve the value"
84 // E.g. common case for tests is to pass in -1 as an invalid query
85 // value. If cast to a unsigned int it becomes 0 (GL_NONE) and is now
86 // a valid enum and negative tests fail. But converting to int
87 // and then to final unsigned int gives us 4294967295 (0xffffffff)
88 // which is what we want.
89 return static_cast<NativeT>(static_cast<GLint64>(std::round(value)));
90 }
91
92 return static_cast<NativeT>(value);
93 }
94
95 } // anonymous namespace
96
97 template <typename QueryT, typename InternalT>
CastFromGLintStateValue(GLenum pname,InternalT value)98 QueryT CastFromGLintStateValue(GLenum pname, InternalT value)
99 {
100 return CastFromStateValue<QueryT, GLint>(pname, clampCast<GLint, InternalT>(value));
101 }
102
103 template GLfloat CastFromGLintStateValue<GLfloat, GLenum>(GLenum pname, GLenum value);
104 template GLint CastFromGLintStateValue<GLint, GLenum>(GLenum pname, GLenum value);
105 template GLint64 CastFromGLintStateValue<GLint64, GLenum>(GLenum pname, GLenum value);
106 template GLuint CastFromGLintStateValue<GLuint, GLenum>(GLenum pname, GLenum value);
107 template GLuint CastFromGLintStateValue<GLuint, GLint>(GLenum pname, GLint value);
108 template GLfloat CastFromGLintStateValue<GLfloat, GLint>(GLenum pname, GLint value);
109 template GLint CastFromGLintStateValue<GLint, GLint>(GLenum pname, GLint value);
110 template GLfloat CastFromGLintStateValue<GLfloat, bool>(GLenum pname, bool value);
111 template GLuint CastFromGLintStateValue<GLuint, bool>(GLenum pname, bool value);
112 template GLint CastFromGLintStateValue<GLint, bool>(GLenum pname, bool value);
113 template GLfloat CastFromGLintStateValue<GLfloat, GLfloat>(GLenum pname, GLfloat value);
114 template GLint CastFromGLintStateValue<GLint, GLfloat>(GLenum pname, GLfloat value);
115 template GLuint CastFromGLintStateValue<GLuint, GLfloat>(GLenum pname, GLfloat value);
116
117 template <typename QueryT, typename NativeT>
CastFromStateValue(GLenum pname,NativeT value)118 QueryT CastFromStateValue(GLenum pname, NativeT value)
119 {
120 GLenum queryType = GLTypeToGLenum<QueryT>::value;
121
122 switch (queryType)
123 {
124 case GL_INT:
125 case GL_INT_64_ANGLEX:
126 case GL_UNSIGNED_INT:
127 case GL_UINT_64_ANGLEX:
128 return CastFromStateValueToInt<QueryT, NativeT>(pname, value);
129 case GL_FLOAT:
130 return CastFromStateValueToFloat<QueryT, NativeT>(pname, value);
131 case GL_BOOL:
132 return static_cast<QueryT>(value == static_cast<NativeT>(0) ? GL_FALSE : GL_TRUE);
133 default:
134 UNREACHABLE();
135 return 0;
136 }
137 }
138 template GLint CastFromStateValue<GLint, GLint>(GLenum pname, GLint value);
139 template GLint CastFromStateValue<GLint, GLint64>(GLenum pname, GLint64 value);
140 template GLint64 CastFromStateValue<GLint64, GLint>(GLenum pname, GLint value);
141 template GLint64 CastFromStateValue<GLint64, GLint64>(GLenum pname, GLint64 value);
142 template GLfloat CastFromStateValue<GLfloat, GLint>(GLenum pname, GLint value);
143 template GLfloat CastFromStateValue<GLfloat, GLuint>(GLenum pname, GLuint value);
144 template GLfloat CastFromStateValue<GLfloat, GLfloat>(GLenum pname, GLfloat value);
145 template GLint CastFromStateValue<GLint, GLfloat>(GLenum pname, GLfloat value);
146 template GLuint CastFromStateValue<GLuint, GLfloat>(GLenum pname, GLfloat value);
147 template GLuint CastFromStateValue<GLuint, GLint>(GLenum pname, GLint value);
148 template GLuint CastFromStateValue<GLuint, GLuint>(GLenum pname, GLuint value);
149 template GLint CastFromStateValue<GLint, GLboolean>(GLenum pname, GLboolean value);
150 template GLint64 CastFromStateValue<GLint64, GLboolean>(GLenum pname, GLboolean value);
151 template GLint CastFromStateValue<GLint, GLuint>(GLenum pname, GLuint value);
152 template GLint64 CastFromStateValue<GLint64, GLuint>(GLenum pname, GLuint value);
153 template GLuint64 CastFromStateValue<GLuint64, GLuint>(GLenum pname, GLuint value);
154
155 template <typename NativeT, typename QueryT>
CastQueryValueTo(GLenum pname,QueryT value)156 NativeT CastQueryValueTo(GLenum pname, QueryT value)
157 {
158 GLenum nativeType = GLTypeToGLenum<NativeT>::value;
159
160 switch (nativeType)
161 {
162 case GL_INT:
163 case GL_INT_64_ANGLEX:
164 case GL_UNSIGNED_INT:
165 case GL_UINT_64_ANGLEX:
166 return CastQueryValueToInt<NativeT, QueryT>(pname, value);
167 case GL_FLOAT:
168 return static_cast<NativeT>(value);
169 case GL_BOOL:
170 return static_cast<NativeT>(value == static_cast<QueryT>(0) ? GL_FALSE : GL_TRUE);
171 default:
172 UNREACHABLE();
173 return 0;
174 }
175 }
176
177 template GLint CastQueryValueTo<GLint, GLfloat>(GLenum pname, GLfloat value);
178 template GLboolean CastQueryValueTo<GLboolean, GLint>(GLenum pname, GLint value);
179 template GLint CastQueryValueTo<GLint, GLint>(GLenum pname, GLint value);
180 template GLint CastQueryValueTo<GLint, GLuint>(GLenum pname, GLuint value);
181 template GLfloat CastQueryValueTo<GLfloat, GLint>(GLenum pname, GLint value);
182 template GLfloat CastQueryValueTo<GLfloat, GLuint>(GLenum pname, GLuint value);
183 template GLfloat CastQueryValueTo<GLfloat, GLfloat>(GLenum pname, GLfloat value);
184 template GLuint CastQueryValueTo<GLuint, GLint>(GLenum pname, GLint value);
185 template GLuint CastQueryValueTo<GLuint, GLuint>(GLenum pname, GLuint value);
186 template GLuint CastQueryValueTo<GLuint, GLfloat>(GLenum pname, GLfloat value);
187
188 template <typename QueryT>
CastStateValues(const Context * context,GLenum nativeType,GLenum pname,unsigned int numParams,QueryT * outParams)189 void CastStateValues(const Context *context,
190 GLenum nativeType,
191 GLenum pname,
192 unsigned int numParams,
193 QueryT *outParams)
194 {
195 if (nativeType == GL_INT)
196 {
197 std::vector<GLint> intParams(numParams, 0);
198 context->getIntegervImpl(pname, intParams.data());
199
200 for (unsigned int i = 0; i < numParams; ++i)
201 {
202 outParams[i] = CastFromStateValue<QueryT>(pname, intParams[i]);
203 }
204 }
205 else if (nativeType == GL_BOOL)
206 {
207 std::vector<GLboolean> boolParams(numParams, GL_FALSE);
208 context->getBooleanvImpl(pname, boolParams.data());
209
210 for (unsigned int i = 0; i < numParams; ++i)
211 {
212 outParams[i] =
213 (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
214 }
215 }
216 else if (nativeType == GL_FLOAT)
217 {
218 std::vector<GLfloat> floatParams(numParams, 0.0f);
219 context->getFloatvImpl(pname, floatParams.data());
220
221 for (unsigned int i = 0; i < numParams; ++i)
222 {
223 outParams[i] = CastFromStateValue<QueryT>(pname, floatParams[i]);
224 }
225 }
226 else if (nativeType == GL_INT_64_ANGLEX)
227 {
228 std::vector<GLint64> int64Params(numParams, 0);
229 context->getInteger64vImpl(pname, int64Params.data());
230
231 for (unsigned int i = 0; i < numParams; ++i)
232 {
233 outParams[i] = CastFromStateValue<QueryT>(pname, int64Params[i]);
234 }
235 }
236 else
237 {
238 WARN() << "Application querying parameter that does not exist.";
239 }
240 }
241
242 // Explicit template instantiation (how we export template functions in different files)
243 // The calls below will make CastStateValues successfully link with the GL state query types
244 // The GL state query API types are: bool, int, uint, float, int64, uint64
245
246 template void CastStateValues<GLboolean>(const Context *,
247 GLenum,
248 GLenum,
249 unsigned int,
250 GLboolean *);
251 template void CastStateValues<GLint>(const Context *, GLenum, GLenum, unsigned int, GLint *);
252 template void CastStateValues<GLuint>(const Context *, GLenum, GLenum, unsigned int, GLuint *);
253 template void CastStateValues<GLfloat>(const Context *, GLenum, GLenum, unsigned int, GLfloat *);
254 template void CastStateValues<GLint64>(const Context *, GLenum, GLenum, unsigned int, GLint64 *);
255
256 template <typename QueryT>
CastIndexedStateValues(Context * context,GLenum nativeType,GLenum pname,GLuint index,unsigned int numParams,QueryT * outParams)257 void CastIndexedStateValues(Context *context,
258 GLenum nativeType,
259 GLenum pname,
260 GLuint index,
261 unsigned int numParams,
262 QueryT *outParams)
263 {
264 if (nativeType == GL_INT)
265 {
266 std::vector<GLint> intParams(numParams, 0);
267 context->getIntegeri_v(pname, index, intParams.data());
268
269 for (unsigned int i = 0; i < numParams; ++i)
270 {
271 outParams[i] = CastFromStateValue<QueryT>(pname, intParams[i]);
272 }
273 }
274 else if (nativeType == GL_BOOL)
275 {
276 std::vector<GLboolean> boolParams(numParams, GL_FALSE);
277 context->getBooleani_v(pname, index, boolParams.data());
278
279 for (unsigned int i = 0; i < numParams; ++i)
280 {
281 outParams[i] =
282 (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
283 }
284 }
285 else if (nativeType == GL_INT_64_ANGLEX)
286 {
287 std::vector<GLint64> int64Params(numParams, 0);
288 context->getInteger64i_v(pname, index, int64Params.data());
289
290 for (unsigned int i = 0; i < numParams; ++i)
291 {
292 outParams[i] = CastFromStateValue<QueryT>(pname, int64Params[i]);
293 }
294 }
295 else
296 UNREACHABLE();
297 }
298
299 template void CastIndexedStateValues<GLboolean>(Context *,
300 GLenum,
301 GLenum,
302 GLuint index,
303 unsigned int,
304 GLboolean *);
305 template void CastIndexedStateValues<GLint>(Context *,
306 GLenum,
307 GLenum,
308 GLuint index,
309 unsigned int,
310 GLint *);
311 template void CastIndexedStateValues<GLuint>(Context *,
312 GLenum,
313 GLenum,
314 GLuint index,
315 unsigned int,
316 GLuint *);
317 template void CastIndexedStateValues<GLfloat>(Context *,
318 GLenum,
319 GLenum,
320 GLuint index,
321 unsigned int,
322 GLfloat *);
323 template void CastIndexedStateValues<GLint64>(Context *,
324 GLenum,
325 GLenum,
326 GLuint index,
327 unsigned int,
328 GLint64 *);
329 } // namespace gl
330