angleutils.h

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Author : Jamie Madill
Date : 2017-06-20 12:57:39
Hash : 4928b7ca
Message : Proliferate gl::Context everywhere. This gives the D3D back-end access to the GL state almost anywhere. This uses the onDestroy hook for Textures to push errors up from destructors, although they still don't quite make it to the Context. There are places, such as in EGL object (Context/Surface) destruction, where we end up calling through to GL implementation internals without having access to a gl::Context. We handle this via a proxy Context to a Display, basically a null context, that has access to impl-side state like the Renderer pointer if necessary. It does not have access to the normal GL state. Also Pass gl::Context to RefCountObject::release(). Since we're using destroy() methods now, we should not ever call the destructor directly. BUG=angleproject:1156 Change-Id: Ie4c32ad6bf6caaff0289901f30b5c6bafa2ce259 Reviewed-on: https://chromium-review.googlesource.com/529707 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Geoff Lang <geofflang@chromium.org>

src/common/angleutils.h

//
// Copyright (c) 2002-2014 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.
//

// angleutils.h: Common ANGLE utilities.

#ifndef COMMON_ANGLEUTILS_H_
#define COMMON_ANGLEUTILS_H_

#include "common/platform.h"

#include <climits>
#include <cstdarg>
#include <cstddef>
#include <string>
#include <set>
#include <sstream>
#include <vector>

// A helper class to disallow copy and assignment operators
namespace angle
{

#if defined(ANGLE_ENABLE_D3D9) || defined(ANGLE_ENABLE_D3D11)
using Microsoft::WRL::ComPtr;
#endif  // defined(ANGLE_ENABLE_D3D9) || defined(ANGLE_ENABLE_D3D11)

class NonCopyable
{
  protected:
    NonCopyable() = default;
    ~NonCopyable() = default;

  private:
    NonCopyable(const NonCopyable&) = delete;
    void operator=(const NonCopyable&) = delete;
};

extern const uintptr_t DirtyPointer;

// Helper class for wrapping an onDestroy function.
template <typename ObjT, typename ContextT>
class UniqueObjectPointer : angle::NonCopyable
{
  public:
    UniqueObjectPointer(const ContextT *context) : mObject(nullptr), mContext(context) {}
    UniqueObjectPointer(ObjT *obj, const ContextT *context) : mObject(obj), mContext(context) {}
    ~UniqueObjectPointer()
    {
        if (mObject)
        {
            mObject->onDestroy(mContext);
        }
    }

    ObjT *operator->() const { return mObject; }

    ObjT *release()
    {
        auto obj = mObject;
        mObject  = nullptr;
        return obj;
    }

    ObjT *get() const { return mObject; }

    void reset(ObjT *obj)
    {
        if (mObject)
        {
            mObject->onDestroy(mContext);
        }
        mObject = obj;
    }

  private:
    ObjT *mObject;
    const ContextT *mContext;
};

}  // namespace angle

template <typename T, size_t N>
constexpr inline size_t ArraySize(T (&)[N])
{
    return N;
}

template <typename T>
class WrappedArray final : angle::NonCopyable
{
  public:
    template <size_t N>
    constexpr WrappedArray(const T (&data)[N]) : mArray(&data[0]), mSize(N)
    {
    }

    constexpr WrappedArray() : mArray(nullptr), mSize(0) {}
    constexpr WrappedArray(const T *data, size_t size) : mArray(data), mSize(size) {}
    ~WrappedArray() {}

    constexpr const T *get() const { return mArray; }
    constexpr size_t size() const { return mSize; }

  private:
    const T *mArray;
    size_t mSize;
};

template <typename T, unsigned int N>
void SafeRelease(T (&resourceBlock)[N])
{
    for (unsigned int i = 0; i < N; i++)
    {
        SafeRelease(resourceBlock[i]);
    }
}

template <typename T>
void SafeRelease(T& resource)
{
    if (resource)
    {
        resource->Release();
        resource = nullptr;
    }
}

template <typename T>
void SafeDelete(T *&resource)
{
    delete resource;
    resource = nullptr;
}

template <typename T>
void SafeDeleteContainer(T& resource)
{
    for (auto &element : resource)
    {
        SafeDelete(element);
    }
    resource.clear();
}

template <typename T>
void SafeDeleteArray(T*& resource)
{
    delete[] resource;
    resource = nullptr;
}

// Provide a less-than function for comparing structs
// Note: struct memory must be initialized to zero, because of packing gaps
template <typename T>
inline bool StructLessThan(const T &a, const T &b)
{
    return (memcmp(&a, &b, sizeof(T)) < 0);
}

// Provide a less-than function for comparing structs
// Note: struct memory must be initialized to zero, because of packing gaps
template <typename T>
inline bool StructEquals(const T &a, const T &b)
{
    return (memcmp(&a, &b, sizeof(T)) == 0);
}

template <typename T>
inline void StructZero(T *obj)
{
    memset(obj, 0, sizeof(T));
}

template <typename T>
inline bool IsMaskFlagSet(T mask, T flag)
{
    // Handles multibit flags as well
    return (mask & flag) == flag;
}

inline const char* MakeStaticString(const std::string &str)
{
    static std::set<std::string> strings;
    std::set<std::string>::iterator it = strings.find(str);
    if (it != strings.end())
    {
        return it->c_str();
    }

    return strings.insert(str).first->c_str();
}

inline std::string ArrayString(unsigned int i)
{
    // We assume UINT_MAX and GL_INVALID_INDEX are equal
    // See DynamicHLSL.cpp
    if (i == UINT_MAX)
    {
        return "";
    }

    std::stringstream strstr;

    strstr << "[";
    strstr << i;
    strstr << "]";

    return strstr.str();
}

inline std::string Str(int i)
{
    std::stringstream strstr;
    strstr << i;
    return strstr.str();
}

size_t FormatStringIntoVector(const char *fmt, va_list vararg, std::vector<char>& buffer);

std::string FormatString(const char *fmt, va_list vararg);
std::string FormatString(const char *fmt, ...);

template <typename T>
std::string ToString(const T &value)
{
    std::ostringstream o;
    o << value;
    return o.str();
}

// snprintf is not defined with MSVC prior to to msvc14
#if defined(_MSC_VER) && _MSC_VER < 1900
#define snprintf _snprintf
#endif

#define GL_BGR565_ANGLEX 0x6ABB
#define GL_BGRA4_ANGLEX 0x6ABC
#define GL_BGR5_A1_ANGLEX 0x6ABD
#define GL_INT_64_ANGLEX 0x6ABE
#define GL_STRUCT_ANGLEX 0x6ABF

// Hidden enum for the NULL D3D device type.
#define EGL_PLATFORM_ANGLE_DEVICE_TYPE_NULL_ANGLE 0x6AC0

// TODO(jmadill): Clean this up at some point.
#define EGL_PLATFORM_ANGLE_PLATFORM_METHODS_ANGLEX 0x9999

#define ANGLE_TRY_CHECKED_MATH(result)                     \
    if (!result.IsValid())                                 \
    {                                                      \
        return gl::InternalError() << "Integer overflow."; \
    }

#endif // COMMON_ANGLEUTILS_H_

kc3-lang/angle/src/common/angleutils.h

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kc3-lang/angle /src/common/angleutils.h