231 lines
8.1 KiB
C++
231 lines
8.1 KiB
C++
//
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// Copyright (c) 2014 The ANGLE Project Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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//
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// queryconversions.cpp: Implementation of state query cast conversions
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#include "libANGLE/queryconversions.h"
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#include <vector>
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#include "libANGLE/Context.h"
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#include "common/utilities.h"
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namespace gl
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{
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namespace
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{
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GLint64 ExpandFloatToInteger(GLfloat value)
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{
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return static_cast<GLint64>((static_cast<double>(0xFFFFFFFFULL) * value - 1.0) / 2.0);
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}
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template <typename QueryT>
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QueryT ClampToQueryRange(GLint64 value)
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{
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const GLint64 min = static_cast<GLint64>(std::numeric_limits<QueryT>::min());
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const GLint64 max = static_cast<GLint64>(std::numeric_limits<QueryT>::max());
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return static_cast<QueryT>(clamp(value, min, max));
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}
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template <typename QueryT, typename NativeT>
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QueryT CastStateValueToInt(GLenum pname, NativeT value)
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{
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GLenum queryType = GLTypeToGLenum<QueryT>::value;
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GLenum nativeType = GLTypeToGLenum<NativeT>::value;
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if (nativeType == GL_FLOAT)
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{
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// RGBA color values and DepthRangeF values are converted to integer using Equation 2.4 from Table 4.5
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if (pname == GL_DEPTH_RANGE || pname == GL_COLOR_CLEAR_VALUE || pname == GL_DEPTH_CLEAR_VALUE || pname == GL_BLEND_COLOR)
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{
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return ClampToQueryRange<QueryT>(ExpandFloatToInteger(static_cast<GLfloat>(value)));
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}
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else
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{
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return gl::iround<QueryT>(static_cast<GLfloat>(value));
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}
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}
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// Clamp 64-bit int values when casting to int
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if (nativeType == GL_INT_64_ANGLEX && queryType == GL_INT)
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{
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GLint64 minIntValue = static_cast<GLint64>(std::numeric_limits<GLint>::min());
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GLint64 maxIntValue = static_cast<GLint64>(std::numeric_limits<GLint>::max());
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GLint64 clampedValue = std::max(std::min(static_cast<GLint64>(value), maxIntValue), minIntValue);
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return static_cast<QueryT>(clampedValue);
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}
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return static_cast<QueryT>(value);
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}
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template <typename QueryT, typename NativeT>
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QueryT CastStateValue(GLenum pname, NativeT value)
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{
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GLenum queryType = GLTypeToGLenum<QueryT>::value;
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switch (queryType)
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{
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case GL_INT:
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return CastStateValueToInt<QueryT, NativeT>(pname, value);
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case GL_INT_64_ANGLEX:
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return CastStateValueToInt<QueryT, NativeT>(pname, value);
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case GL_FLOAT:
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return static_cast<QueryT>(value);
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case GL_BOOL:
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return static_cast<QueryT>(value == static_cast<NativeT>(0) ? GL_FALSE : GL_TRUE);
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default:
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UNREACHABLE();
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return 0;
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}
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}
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} // anonymous namespace
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template <>
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GLenum GLTypeToGLenum<GLint>::value = GL_INT;
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template <>
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GLenum GLTypeToGLenum<GLuint>::value = GL_UNSIGNED_INT;
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template <>
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GLenum GLTypeToGLenum<GLboolean>::value = GL_BOOL;
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template <>
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GLenum GLTypeToGLenum<GLint64>::value = GL_INT_64_ANGLEX;
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template <>
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GLenum GLTypeToGLenum<GLfloat>::value = GL_FLOAT;
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template <typename QueryT>
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void CastStateValues(Context *context, GLenum nativeType, GLenum pname,
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unsigned int numParams, QueryT *outParams)
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{
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if (nativeType == GL_INT)
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{
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std::vector<GLint> intParams(numParams, 0);
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context->getIntegerv(pname, intParams.data());
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for (unsigned int i = 0; i < numParams; ++i)
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{
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outParams[i] = CastStateValue<QueryT>(pname, intParams[i]);
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}
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}
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else if (nativeType == GL_BOOL)
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{
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std::vector<GLboolean> boolParams(numParams, GL_FALSE);
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context->getBooleanv(pname, boolParams.data());
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for (unsigned int i = 0; i < numParams; ++i)
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{
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outParams[i] = (boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
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}
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}
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else if (nativeType == GL_FLOAT)
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{
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std::vector<GLfloat> floatParams(numParams, 0.0f);
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context->getFloatv(pname, floatParams.data());
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for (unsigned int i = 0; i < numParams; ++i)
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{
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outParams[i] = CastStateValue<QueryT>(pname, floatParams[i]);
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}
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}
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else if (nativeType == GL_INT_64_ANGLEX)
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{
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std::vector<GLint64> int64Params(numParams, 0);
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context->getInteger64v(pname, int64Params.data());
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for (unsigned int i = 0; i < numParams; ++i)
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{
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outParams[i] = CastStateValue<QueryT>(pname, int64Params[i]);
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}
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}
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else UNREACHABLE();
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}
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// Explicit template instantiation (how we export template functions in different files)
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// The calls below will make CastStateValues successfully link with the GL state query types
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// The GL state query API types are: bool, int, uint, float, int64
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template void CastStateValues<GLboolean>(Context *, GLenum, GLenum, unsigned int, GLboolean *);
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template void CastStateValues<GLint>(Context *, GLenum, GLenum, unsigned int, GLint *);
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template void CastStateValues<GLuint>(Context *, GLenum, GLenum, unsigned int, GLuint *);
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template void CastStateValues<GLfloat>(Context *, GLenum, GLenum, unsigned int, GLfloat *);
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template void CastStateValues<GLint64>(Context *, GLenum, GLenum, unsigned int, GLint64 *);
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template <typename QueryT>
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void CastIndexedStateValues(Context *context,
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GLenum nativeType,
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GLenum pname,
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GLuint index,
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unsigned int numParams,
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QueryT *outParams)
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{
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if (nativeType == GL_INT)
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{
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std::vector<GLint> intParams(numParams, 0);
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context->getIntegeri_v(pname, index, intParams.data());
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for (unsigned int i = 0; i < numParams; ++i)
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{
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outParams[i] = CastStateValue<QueryT>(pname, intParams[i]);
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}
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}
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else if (nativeType == GL_BOOL)
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{
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std::vector<GLboolean> boolParams(numParams, GL_FALSE);
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context->getBooleani_v(pname, index, boolParams.data());
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for (unsigned int i = 0; i < numParams; ++i)
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{
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outParams[i] =
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(boolParams[i] == GL_FALSE ? static_cast<QueryT>(0) : static_cast<QueryT>(1));
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}
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}
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else if (nativeType == GL_INT_64_ANGLEX)
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{
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std::vector<GLint64> int64Params(numParams, 0);
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context->getInteger64i_v(pname, index, int64Params.data());
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for (unsigned int i = 0; i < numParams; ++i)
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{
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outParams[i] = CastStateValue<QueryT>(pname, int64Params[i]);
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}
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}
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else
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UNREACHABLE();
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}
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template void CastIndexedStateValues<GLboolean>(Context *,
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GLenum,
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GLenum,
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GLuint index,
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unsigned int,
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GLboolean *);
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template void CastIndexedStateValues<GLint>(Context *,
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GLenum,
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GLenum,
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GLuint index,
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unsigned int,
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GLint *);
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template void CastIndexedStateValues<GLuint>(Context *,
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GLenum,
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GLenum,
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GLuint index,
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unsigned int,
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GLuint *);
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template void CastIndexedStateValues<GLfloat>(Context *,
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GLenum,
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GLenum,
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GLuint index,
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unsigned int,
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GLfloat *);
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template void CastIndexedStateValues<GLint64>(Context *,
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GLenum,
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GLenum,
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GLuint index,
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unsigned int,
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GLint64 *);
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}
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