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//
// Copyright (c) 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.
// Error.h: Defines the egl::Error and gl::Error classes which encapsulate API errors
// and optional error messages.
#ifndef LIBANGLE_ERROR_H_
#define LIBANGLE_ERROR_H_
#include <EGL/egl.h>
#include <EGL/eglext.h>
#include "angle_gl.h"
#include "common/angleutils.h"
#include "common/debug.h"
#include <memory>
#include <ostream>
#include <string>
namespace angle
{
template <typename ErrorT, typename ResultT, typename ErrorBaseT, ErrorBaseT NoErrorVal>
class ANGLE_NO_DISCARD ErrorOrResultBase
{
public:
ErrorOrResultBase(const ErrorT &error) : mError(error) {}
ErrorOrResultBase(ErrorT &&error) : mError(std::move(error)) {}
ErrorOrResultBase(ResultT &&result) : mError(NoErrorVal), mResult(std::forward<ResultT>(result))
{
}
ErrorOrResultBase(const ResultT &result) : mError(NoErrorVal), mResult(result) {}
bool isError() const { return mError.isError(); }
const ErrorT &getError() const { return mError; }
ResultT &&getResult() { return std::move(mResult); }
private:
ErrorT mError;
ResultT mResult;
};
template <typename ErrorT, typename ErrorBaseT, ErrorBaseT NoErrorVal, typename CodeT, CodeT EnumT>
class ErrorStreamBase : angle::NonCopyable
{
public:
ErrorStreamBase() : mID(EnumT) {}
ErrorStreamBase(GLuint id) : mID(id) {}
template <typename T>
ErrorStreamBase &operator<<(T value)
{
mErrorStream << value;
return *this;
}
operator ErrorT() { return ErrorT(EnumT, mID, mErrorStream.str()); }
template <typename ResultT>
operator ErrorOrResultBase<ErrorT, ResultT, ErrorBaseT, NoErrorVal>()
{
return static_cast<ErrorT>(*this);
}
private:
GLuint mID;
std::ostringstream mErrorStream;
};
} // namespace angle
namespace egl
{
class Error;
} // namespace egl
namespace gl
{
class ANGLE_NO_DISCARD Error final
{
public:
explicit inline Error(GLenum errorCode);
Error(GLenum errorCode, std::string &&message);
Error(GLenum errorCode, GLuint id, std::string &&message);
inline Error(const Error &other);
inline Error(Error &&other);
inline ~Error() = default;
// automatic error type conversion
inline Error(egl::Error &&eglErr);
inline Error(egl::Error eglErr);
inline Error &operator=(const Error &other);
inline Error &operator=(Error &&other);
inline GLenum getCode() const;
inline GLuint getID() const;
inline bool isError() const;
const std::string &getMessage() const;
// Useful for mocking and testing
bool operator==(const Error &other) const;
bool operator!=(const Error &other) const;
private:
void createMessageString() const;
friend std::ostream &operator<<(std::ostream &os, const Error &err);
friend class egl::Error;
GLenum mCode;
GLuint mID;
mutable std::unique_ptr<std::string> mMessage;
};
template <typename ResultT>
using ErrorOrResult = angle::ErrorOrResultBase<Error, ResultT, GLenum, GL_NO_ERROR>;
namespace priv
{
template <GLenum EnumT>
using ErrorStream = angle::ErrorStreamBase<Error, GLenum, GL_NO_ERROR, GLenum, EnumT>;
} // namespace priv
using InternalError = priv::ErrorStream<GL_INVALID_OPERATION>;
using InvalidEnum = priv::ErrorStream<GL_INVALID_ENUM>;
using InvalidValue = priv::ErrorStream<GL_INVALID_VALUE>;
using InvalidOperation = priv::ErrorStream<GL_INVALID_OPERATION>;
using StackOverflow = priv::ErrorStream<GL_STACK_OVERFLOW>;
using StackUnderflow = priv::ErrorStream<GL_STACK_UNDERFLOW>;
using OutOfMemory = priv::ErrorStream<GL_OUT_OF_MEMORY>;
using InvalidFramebufferOperation = priv::ErrorStream<GL_INVALID_FRAMEBUFFER_OPERATION>;
inline Error NoError()
{
return Error(GL_NO_ERROR);
}
using LinkResult = ErrorOrResult<bool>;
} // namespace gl
namespace egl
{
class ANGLE_NO_DISCARD Error final
{
public:
explicit inline Error(EGLint errorCode);
Error(EGLint errorCode, std::string &&message);
Error(EGLint errorCode, EGLint id, std::string &&message);
inline Error(const Error &other);
inline Error(Error &&other);
inline ~Error() = default;
// automatic error type conversion
inline Error(gl::Error &&glErr);
inline Error(gl::Error glErr);
inline Error &operator=(const Error &other);
inline Error &operator=(Error &&other);
inline EGLint getCode() const;
inline EGLint getID() const;
inline bool isError() const;
const std::string &getMessage() const;
private:
void createMessageString() const;
friend std::ostream &operator<<(std::ostream &os, const Error &err);
friend class gl::Error;
EGLint mCode;
EGLint mID;
mutable std::unique_ptr<std::string> mMessage;
};
template <typename ResultT>
using ErrorOrResult = angle::ErrorOrResultBase<Error, ResultT, EGLint, EGL_SUCCESS>;
namespace priv
{
template <EGLint EnumT>
using ErrorStream = angle::ErrorStreamBase<Error, EGLint, EGL_SUCCESS, EGLint, EnumT>;
} // namespace priv
using EglNotInitialized = priv::ErrorStream<EGL_NOT_INITIALIZED>;
using EglBadAccess = priv::ErrorStream<EGL_BAD_ACCESS>;
using EglBadAlloc = priv::ErrorStream<EGL_BAD_ALLOC>;
using EglBadAttribute = priv::ErrorStream<EGL_BAD_ATTRIBUTE>;
using EglBadConfig = priv::ErrorStream<EGL_BAD_CONFIG>;
using EglBadContext = priv::ErrorStream<EGL_BAD_CONTEXT>;
using EglBadCurrentSurface = priv::ErrorStream<EGL_BAD_CURRENT_SURFACE>;
using EglBadDisplay = priv::ErrorStream<EGL_BAD_DISPLAY>;
using EglBadMatch = priv::ErrorStream<EGL_BAD_MATCH>;
using EglBadNativeWindow = priv::ErrorStream<EGL_BAD_NATIVE_WINDOW>;
using EglBadParameter = priv::ErrorStream<EGL_BAD_PARAMETER>;
using EglBadSurface = priv::ErrorStream<EGL_BAD_SURFACE>;
using EglContextLost = priv::ErrorStream<EGL_CONTEXT_LOST>;
using EglBadStream = priv::ErrorStream<EGL_BAD_STREAM_KHR>;
using EglBadState = priv::ErrorStream<EGL_BAD_STATE_KHR>;
using EglBadDevice = priv::ErrorStream<EGL_BAD_DEVICE_EXT>;
inline Error NoError()
{
return Error(EGL_SUCCESS);
}
} // namespace egl
#define ANGLE_CONCAT1(x, y) x##y
#define ANGLE_CONCAT2(x, y) ANGLE_CONCAT1(x, y)
#define ANGLE_LOCAL_VAR ANGLE_CONCAT2(_localVar, __LINE__)
#define ANGLE_TRY_TEMPLATE(EXPR, FUNC) \
{ \
auto ANGLE_LOCAL_VAR = EXPR; \
if (ANGLE_LOCAL_VAR.isError()) \
{ \
FUNC(ANGLE_LOCAL_VAR); \
} \
} \
ANGLE_EMPTY_STATEMENT
#define ANGLE_RETURN(X) return X;
#define ANGLE_TRY(EXPR) ANGLE_TRY_TEMPLATE(EXPR, ANGLE_RETURN);
#define ANGLE_TRY_RESULT(EXPR, RESULT) \
{ \
auto ANGLE_LOCAL_VAR = EXPR; \
if (ANGLE_LOCAL_VAR.isError()) \
{ \
return ANGLE_LOCAL_VAR.getError(); \
} \
RESULT = ANGLE_LOCAL_VAR.getResult(); \
} \
ANGLE_EMPTY_STATEMENT
// TODO(jmadill): Introduce way to store errors to a const Context.
#define ANGLE_SWALLOW_ERR(EXPR) \
{ \
auto ANGLE_LOCAL_VAR = EXPR; \
if (ANGLE_LOCAL_VAR.isError()) \
{ \
ERR() << "Unhandled internal error: " << ANGLE_LOCAL_VAR; \
} \
} \
ANGLE_EMPTY_STATEMENT
#undef ANGLE_LOCAL_VAR
#undef ANGLE_CONCAT2
#undef ANGLE_CONCAT1
#include "Error.inl"
#endif // LIBANGLE_ERROR_H_
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