queryconversions.h

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Author : Stuart Morgan
Date : 2019-08-14 12:25:12
Hash : 9d737966
Message : Standardize copyright notices to project style For all "ANGLE Project" copyrights, standardize to the format specified by the style guide. Changes: - "Copyright (c)" and "Copyright(c)" changed to just "Copyright". - Removed the second half of date ranges ("Y1Y1-Y2Y2"->"Y1Y1"). - Fixed a small number of files that had no copyright date using the initial commit year from the version control history. - Fixed one instance of copyright being "The ANGLE Project" rather than "The ANGLE Project Authors" These changes are applied both to the copyright of source file, and where applicable to copyright statements that are generated by templates. BUG=angleproject:3811 Change-Id: I973dd65e4ef9deeba232d5be74c768256a0eb2e5 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1754397 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org>

src/libANGLE/queryconversions.h

//
// Copyright 2014 The ANGLE Project Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
//

// queryconversions.h: Declaration of state query cast conversions

#ifndef LIBANGLE_QUERY_CONVERSIONS_H_
#define LIBANGLE_QUERY_CONVERSIONS_H_

#include "angle_gl.h"
#include "common/angleutils.h"

namespace gl
{
class Context;

// Helper class for converting a GL type to a GLenum:
// We can't use CastStateValueEnum generally, because of GLboolean + GLubyte overlap.
// We restrict our use to CastFromStateValue and CastQueryValueTo, where it eliminates
// duplicate parameters.

template <typename GLType>
struct GLTypeToGLenum
{
    // static constexpr GLenum value;
};

template <>
struct GLTypeToGLenum<GLint>
{
    static constexpr GLenum value = GL_INT;
};
template <>
struct GLTypeToGLenum<GLuint>
{
    static constexpr GLenum value = GL_UNSIGNED_INT;
};
template <>
struct GLTypeToGLenum<GLboolean>
{
    static constexpr GLenum value = GL_BOOL;
};
template <>
struct GLTypeToGLenum<GLint64>
{
    static constexpr GLenum value = GL_INT_64_ANGLEX;
};
template <>
struct GLTypeToGLenum<GLuint64>
{
    static constexpr GLenum value = GL_UINT_64_ANGLEX;
};
template <>
struct GLTypeToGLenum<GLfloat>
{
    static constexpr GLenum value = GL_FLOAT;
};

GLint CastMaskValue(GLuint value);

template <typename QueryT, typename InternalT>
QueryT CastFromGLintStateValue(GLenum pname, InternalT value);

template <typename QueryT, typename NativeT>
QueryT CastFromStateValue(GLenum pname, NativeT value);

template <typename NativeT, typename QueryT>
NativeT CastQueryValueTo(GLenum pname, QueryT value);

template <typename ParamType>
GLenum ConvertToGLenum(GLenum pname, ParamType param)
{
    return static_cast<GLenum>(CastQueryValueTo<GLuint>(pname, param));
}

template <typename ParamType>
GLenum ConvertToGLenum(ParamType param)
{
    return ConvertToGLenum(GL_NONE, param);
}

template <typename OutType>
OutType ConvertGLenum(GLenum param)
{
    return static_cast<OutType>(param);
}

template <typename InType, typename OutType>
void ConvertGLenumValue(InType param, OutType *out)
{
    *out = ConvertGLenum<OutType>(static_cast<GLenum>(param));
}

template <typename PackedEnumType, typename OutType>
void ConvertPackedEnum(PackedEnumType param, OutType *out)
{
    *out = static_cast<OutType>(ToGLenum(param));
}

template <typename ParamType>
GLint ConvertToGLint(ParamType param)
{
    return CastQueryValueTo<GLint>(GL_NONE, param);
}

template <typename ParamType>
bool ConvertToBool(ParamType param)
{
    return param != GL_FALSE;
}

template <typename ParamType>
GLboolean ConvertToGLBoolean(ParamType param)
{
    return param ? GL_TRUE : GL_FALSE;
}

// The GL state query API types are: bool, int, uint, float, int64, uint64
template <typename QueryT>
void CastStateValues(Context *context,
                     GLenum nativeType,
                     GLenum pname,
                     unsigned int numParams,
                     QueryT *outParams);

// The GL state query API types are: bool, int, uint, float, int64, uint64
template <typename QueryT>
void CastIndexedStateValues(Context *context,
                            GLenum nativeType,
                            GLenum pname,
                            GLuint index,
                            unsigned int numParams,
                            QueryT *outParams);
}  // namespace gl

#endif  // LIBANGLE_QUERY_CONVERSIONS_H_

kc3-lang/angle/src/libANGLE/queryconversions.h

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kc3-lang/angle /src/libANGLE/queryconversions.h