EGLWindow.cpp

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Author : Jamie Madill
Date : 2019-03-20 20:49:44
Hash : f455f756
Message : Reuse angle_end2end_test windows and displays. This both speeds up test execution and cuts down on the number of new windows and displays created for a test config. This feature is only currently enabled for Windows NVIDIA and Intel. On every other config there were blocking issues that would need investigation. Several tests were manually flagged as needed new displays on each iteration to prevent test flakiness. This feature might fix the issues with Intel test flakiness that have been prominent on the ANGLE CQ. WGL configurations have also been removed from ANGLE tests. So this removes more of the code from ANGLETest.cpp. Bug: angleproject:3261 Change-Id: Ic2864d4806ad38e0eeaa3c0afcd54ae1c548090f Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1520995 Commit-Queue: Jamie Madill <jmadill@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org>
util/EGLWindow.cpp
//
// Copyright (c) 2013 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.
//

#include "util/EGLWindow.h"

#include <cassert>
#include <iostream>
#include <vector>

#include <string.h>

#include "platform/Platform.h"
#include "util/OSWindow.h"
#include "util/system_utils.h"

EGLPlatformParameters::EGLPlatformParameters()
    : renderer(EGL_PLATFORM_ANGLE_TYPE_DEFAULT_ANGLE),
      majorVersion(EGL_DONT_CARE),
      minorVersion(EGL_DONT_CARE),
      deviceType(EGL_PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE),
      presentPath(EGL_DONT_CARE)
{}

EGLPlatformParameters::EGLPlatformParameters(EGLint renderer)
    : renderer(renderer),
      majorVersion(EGL_DONT_CARE),
      minorVersion(EGL_DONT_CARE),
      deviceType(EGL_PLATFORM_ANGLE_DEVICE_TYPE_HARDWARE_ANGLE),
      presentPath(EGL_DONT_CARE)
{}

EGLPlatformParameters::EGLPlatformParameters(EGLint renderer,
                                             EGLint majorVersion,
                                             EGLint minorVersion,
                                             EGLint deviceType)
    : renderer(renderer),
      majorVersion(majorVersion),
      minorVersion(minorVersion),
      deviceType(deviceType),
      presentPath(EGL_DONT_CARE)
{}

EGLPlatformParameters::EGLPlatformParameters(EGLint renderer,
                                             EGLint majorVersion,
                                             EGLint minorVersion,
                                             EGLint deviceType,
                                             EGLint presentPath)
    : renderer(renderer),
      majorVersion(majorVersion),
      minorVersion(minorVersion),
      deviceType(deviceType),
      presentPath(presentPath)
{}

bool operator<(const EGLPlatformParameters &a, const EGLPlatformParameters &b)
{
    if (a.renderer != b.renderer)
    {
        return a.renderer < b.renderer;
    }

    if (a.majorVersion != b.majorVersion)
    {
        return a.majorVersion < b.majorVersion;
    }

    if (a.minorVersion != b.minorVersion)
    {
        return a.minorVersion < b.minorVersion;
    }

    if (a.deviceType != b.deviceType)
    {
        return a.deviceType < b.deviceType;
    }

    return a.presentPath < b.presentPath;
}

bool operator==(const EGLPlatformParameters &a, const EGLPlatformParameters &b)
{
    return (a.renderer == b.renderer) && (a.majorVersion == b.majorVersion) &&
           (a.minorVersion == b.minorVersion) && (a.deviceType == b.deviceType) &&
           (a.presentPath == b.presentPath);
}

// ConfigParameters implementation.
ConfigParameters::ConfigParameters()
    : platformMethods(nullptr),
      redBits(-1),
      greenBits(-1),
      blueBits(-1),
      alphaBits(-1),
      depthBits(-1),
      stencilBits(-1),
      swapInterval(-1),
      componentType(EGL_COLOR_COMPONENT_TYPE_FIXED_EXT),
      multisample(false),
      debug(false),
      noError(false),
      bindGeneratesResource(true),
      clientArraysEnabled(true),
      robustAccess(false),
      samples(-1)
{}

ConfigParameters::~ConfigParameters() = default;

void ConfigParameters::reset()
{
    *this = ConfigParameters();
}

// static
bool ConfigParameters::CanShareDisplay(const ConfigParameters &a, const ConfigParameters &b)
{
    return a.debugLayersEnabled == b.debugLayersEnabled &&
           a.contextVirtualization == b.contextVirtualization &&
           a.platformMethods == b.platformMethods;
}

// GLWindowBase implementation.
GLWindowBase::GLWindowBase(EGLint glesMajorVersion, EGLint glesMinorVersion)
    : mClientMajorVersion(glesMajorVersion), mClientMinorVersion(glesMinorVersion)
{}

GLWindowBase::~GLWindowBase() = default;

// EGLWindow implementation.
EGLWindow::EGLWindow(EGLint glesMajorVersion,
                     EGLint glesMinorVersion,
                     const EGLPlatformParameters &platform)
    : GLWindowBase(glesMajorVersion, glesMinorVersion),
      mConfig(0),
      mDisplay(EGL_NO_DISPLAY),
      mSurface(EGL_NO_SURFACE),
      mContext(EGL_NO_CONTEXT),
      mEGLMajorVersion(0),
      mEGLMinorVersion(0),
      mPlatform(platform)
{}

EGLWindow::~EGLWindow()
{
    destroyGL();
}

void EGLWindow::swap()
{
    eglSwapBuffers(mDisplay, mSurface);
}

EGLConfig EGLWindow::getConfig() const
{
    return mConfig;
}

EGLDisplay EGLWindow::getDisplay() const
{
    return mDisplay;
}

EGLSurface EGLWindow::getSurface() const
{
    return mSurface;
}

EGLContext EGLWindow::getContext() const
{
    return mContext;
}

bool EGLWindow::initializeGL(OSWindow *osWindow,
                             angle::Library *glWindowingLibrary,
                             const ConfigParameters &params)
{
    if (!initializeDisplay(osWindow, glWindowingLibrary, params))
        return false;
    if (!initializeSurface(osWindow, glWindowingLibrary, params))
        return false;
    return initializeContext();
}

bool EGLWindow::initializeDisplay(OSWindow *osWindow,
                                  angle::Library *glWindowingLibrary,
                                  const ConfigParameters &params)
{
    mConfigParams = params;

#if defined(ANGLE_USE_UTIL_LOADER)
    PFNEGLGETPROCADDRESSPROC getProcAddress;
    glWindowingLibrary->getAs("eglGetProcAddress", &getProcAddress);
    if (!getProcAddress)
    {
        return false;
    }

    // Likely we will need to use a fallback to Library::getAs on non-ANGLE platforms.
    angle::LoadEGL(getProcAddress);
#endif  // defined(ANGLE_USE_UTIL_LOADER)

    std::vector<EGLAttrib> displayAttributes;
    displayAttributes.push_back(EGL_PLATFORM_ANGLE_TYPE_ANGLE);
    displayAttributes.push_back(mPlatform.renderer);
    displayAttributes.push_back(EGL_PLATFORM_ANGLE_MAX_VERSION_MAJOR_ANGLE);
    displayAttributes.push_back(mPlatform.majorVersion);
    displayAttributes.push_back(EGL_PLATFORM_ANGLE_MAX_VERSION_MINOR_ANGLE);
    displayAttributes.push_back(mPlatform.minorVersion);

    if (mPlatform.deviceType != EGL_DONT_CARE)
    {
        displayAttributes.push_back(EGL_PLATFORM_ANGLE_DEVICE_TYPE_ANGLE);
        displayAttributes.push_back(mPlatform.deviceType);
    }

    if (mPlatform.presentPath != EGL_DONT_CARE)
    {
        const char *extensionString =
            static_cast<const char *>(eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS));
        if (strstr(extensionString, "EGL_ANGLE_experimental_present_path") == nullptr)
        {
            destroyGL();
            return false;
        }

        displayAttributes.push_back(EGL_EXPERIMENTAL_PRESENT_PATH_ANGLE);
        displayAttributes.push_back(mPlatform.presentPath);
    }

    // Set debug layer settings if requested.
    if (mConfigParams.debugLayersEnabled.valid())
    {
        displayAttributes.push_back(EGL_PLATFORM_ANGLE_DEBUG_LAYERS_ENABLED_ANGLE);
        displayAttributes.push_back(mConfigParams.debugLayersEnabled.value() ? EGL_TRUE
                                                                             : EGL_FALSE);
    }

    if (mConfigParams.contextVirtualization.valid())
    {
        displayAttributes.push_back(EGL_PLATFORM_ANGLE_CONTEXT_VIRTUALIZATION_ANGLE);
        displayAttributes.push_back(mConfigParams.contextVirtualization.value() ? EGL_TRUE
                                                                                : EGL_FALSE);
    }

    if (mConfigParams.platformMethods)
    {
        static_assert(sizeof(EGLAttrib) == sizeof(mConfigParams.platformMethods),
                      "Unexpected pointer size");
        displayAttributes.push_back(EGL_PLATFORM_ANGLE_PLATFORM_METHODS_ANGLEX);
        displayAttributes.push_back(reinterpret_cast<EGLAttrib>(mConfigParams.platformMethods));
    }

    displayAttributes.push_back(EGL_NONE);

    mDisplay = eglGetPlatformDisplay(EGL_PLATFORM_ANGLE_ANGLE,
                                     reinterpret_cast<void *>(osWindow->getNativeDisplay()),
                                     &displayAttributes[0]);
    if (mDisplay == EGL_NO_DISPLAY)
    {
        destroyGL();
        return false;
    }

    if (eglInitialize(mDisplay, &mEGLMajorVersion, &mEGLMinorVersion) == EGL_FALSE)
    {
        destroyGL();
        return false;
    }

    return true;
}

bool EGLWindow::initializeSurface(OSWindow *osWindow,
                                  angle::Library *glWindowingLibrary,
                                  const ConfigParameters &params)
{
    mConfigParams                 = params;
    const char *displayExtensions = eglQueryString(mDisplay, EGL_EXTENSIONS);

    std::vector<EGLint> configAttributes = {
        EGL_RED_SIZE,
        (mConfigParams.redBits >= 0) ? mConfigParams.redBits : EGL_DONT_CARE,
        EGL_GREEN_SIZE,
        (mConfigParams.greenBits >= 0) ? mConfigParams.greenBits : EGL_DONT_CARE,
        EGL_BLUE_SIZE,
        (mConfigParams.blueBits >= 0) ? mConfigParams.blueBits : EGL_DONT_CARE,
        EGL_ALPHA_SIZE,
        (mConfigParams.alphaBits >= 0) ? mConfigParams.alphaBits : EGL_DONT_CARE,
        EGL_DEPTH_SIZE,
        (mConfigParams.depthBits >= 0) ? mConfigParams.depthBits : EGL_DONT_CARE,
        EGL_STENCIL_SIZE,
        (mConfigParams.stencilBits >= 0) ? mConfigParams.stencilBits : EGL_DONT_CARE,
        EGL_SAMPLE_BUFFERS,
        mConfigParams.multisample ? 1 : 0,
        EGL_SAMPLES,
        (mConfigParams.samples >= 0) ? mConfigParams.samples : EGL_DONT_CARE,
    };

    // Add dynamic attributes
    bool hasPixelFormatFloat = strstr(displayExtensions, "EGL_EXT_pixel_format_float") != nullptr;
    if (!hasPixelFormatFloat && mConfigParams.componentType != EGL_COLOR_COMPONENT_TYPE_FIXED_EXT)
    {
        destroyGL();
        return false;
    }
    if (hasPixelFormatFloat)
    {
        configAttributes.push_back(EGL_COLOR_COMPONENT_TYPE_EXT);
        configAttributes.push_back(mConfigParams.componentType);
    }

    // Finish the attribute list
    configAttributes.push_back(EGL_NONE);

    if (!FindEGLConfig(mDisplay, configAttributes.data(), &mConfig))
    {
        std::cout << "Could not find a suitable EGL config!" << std::endl;
        destroyGL();
        return false;
    }

    eglGetConfigAttrib(mDisplay, mConfig, EGL_RED_SIZE, &mConfigParams.redBits);
    eglGetConfigAttrib(mDisplay, mConfig, EGL_GREEN_SIZE, &mConfigParams.greenBits);
    eglGetConfigAttrib(mDisplay, mConfig, EGL_BLUE_SIZE, &mConfigParams.blueBits);
    eglGetConfigAttrib(mDisplay, mConfig, EGL_ALPHA_SIZE, &mConfigParams.alphaBits);
    eglGetConfigAttrib(mDisplay, mConfig, EGL_DEPTH_SIZE, &mConfigParams.depthBits);
    eglGetConfigAttrib(mDisplay, mConfig, EGL_STENCIL_SIZE, &mConfigParams.stencilBits);
    eglGetConfigAttrib(mDisplay, mConfig, EGL_SAMPLES, &mConfigParams.samples);

    std::vector<EGLint> surfaceAttributes;
    if (strstr(displayExtensions, "EGL_NV_post_sub_buffer") != nullptr)
    {
        surfaceAttributes.push_back(EGL_POST_SUB_BUFFER_SUPPORTED_NV);
        surfaceAttributes.push_back(EGL_TRUE);
    }

    bool hasRobustResourceInit =
        strstr(displayExtensions, "EGL_ANGLE_robust_resource_initialization") != nullptr;
    if (hasRobustResourceInit && mConfigParams.robustResourceInit.valid())
    {
        surfaceAttributes.push_back(EGL_ROBUST_RESOURCE_INITIALIZATION_ANGLE);
        surfaceAttributes.push_back(mConfigParams.robustResourceInit.value() ? EGL_TRUE
                                                                             : EGL_FALSE);
    }

    surfaceAttributes.push_back(EGL_NONE);

    osWindow->resetNativeWindow();

    mSurface = eglCreateWindowSurface(mDisplay, mConfig, osWindow->getNativeWindow(),
                                      &surfaceAttributes[0]);
    if (eglGetError() != EGL_SUCCESS || (mSurface == EGL_NO_SURFACE))
    {
        destroyGL();
        return false;
    }

#if defined(ANGLE_USE_UTIL_LOADER)
    angle::LoadGLES(eglGetProcAddress);
#endif  // defined(ANGLE_USE_UTIL_LOADER)

    return true;
}

EGLContext EGLWindow::createContext(EGLContext share) const
{
    const char *displayExtensions = eglQueryString(mDisplay, EGL_EXTENSIONS);

    // EGL_KHR_create_context is required to request a ES3+ context.
    bool hasKHRCreateContext = strstr(displayExtensions, "EGL_KHR_create_context") != nullptr;
    if (mClientMajorVersion > 2 && !(mEGLMajorVersion > 1 || mEGLMinorVersion >= 5) &&
        !hasKHRCreateContext)
    {
        std::cerr << "EGL_KHR_create_context incompatibility.\n";
        return EGL_NO_CONTEXT;
    }

    bool hasWebGLCompatibility =
        strstr(displayExtensions, "EGL_ANGLE_create_context_webgl_compatibility") != nullptr;
    if (mConfigParams.webGLCompatibility.valid() && !hasWebGLCompatibility)
    {
        std::cerr << "EGL_ANGLE_create_context_webgl_compatibility missing.\n";
        return EGL_NO_CONTEXT;
    }

    bool hasCreateContextExtensionsEnabled =
        strstr(displayExtensions, "EGL_ANGLE_create_context_extensions_enabled") != nullptr;
    if (mConfigParams.extensionsEnabled.valid() && !hasCreateContextExtensionsEnabled)
    {
        std::cerr << "EGL_ANGLE_create_context_extensions_enabled missing.\n";
        return EGL_NO_CONTEXT;
    }

    bool hasRobustness = strstr(displayExtensions, "EGL_EXT_create_context_robustness") != nullptr;
    if (mConfigParams.robustAccess && !hasRobustness)
    {
        std::cerr << "EGL_EXT_create_context_robustness missing.\n";
        return EGL_NO_CONTEXT;
    }

    bool hasBindGeneratesResource =
        strstr(displayExtensions, "EGL_CHROMIUM_create_context_bind_generates_resource") != nullptr;
    if (!mConfigParams.bindGeneratesResource && !hasBindGeneratesResource)
    {
        std::cerr << "EGL_CHROMIUM_create_context_bind_generates_resource missing.\n";
        return EGL_NO_CONTEXT;
    }

    bool hasClientArraysExtension =
        strstr(displayExtensions, "EGL_ANGLE_create_context_client_arrays") != nullptr;
    if (!mConfigParams.clientArraysEnabled && !hasClientArraysExtension)
    {
        // Non-default state requested without the extension present
        std::cerr << "EGL_ANGLE_create_context_client_arrays missing.\n";
        return EGL_NO_CONTEXT;
    }

    bool hasProgramCacheControlExtension =
        strstr(displayExtensions, "EGL_ANGLE_program_cache_control ") != nullptr;
    if (mConfigParams.contextProgramCacheEnabled.valid() && !hasProgramCacheControlExtension)
    {
        std::cerr << "EGL_ANGLE_program_cache_control missing.\n";
        return EGL_NO_CONTEXT;
    }

    eglBindAPI(EGL_OPENGL_ES_API);
    if (eglGetError() != EGL_SUCCESS)
    {
        std::cerr << "Error on eglBindAPI.\n";
        return EGL_NO_CONTEXT;
    }

    std::vector<EGLint> contextAttributes;
    if (hasKHRCreateContext)
    {
        contextAttributes.push_back(EGL_CONTEXT_MAJOR_VERSION_KHR);
        contextAttributes.push_back(mClientMajorVersion);

        contextAttributes.push_back(EGL_CONTEXT_MINOR_VERSION_KHR);
        contextAttributes.push_back(mClientMinorVersion);

        contextAttributes.push_back(EGL_CONTEXT_OPENGL_DEBUG);
        contextAttributes.push_back(mConfigParams.debug ? EGL_TRUE : EGL_FALSE);

        // TODO(jmadill): Check for the extension string.
        // bool hasKHRCreateContextNoError = strstr(displayExtensions,
        // "EGL_KHR_create_context_no_error") != nullptr;

        contextAttributes.push_back(EGL_CONTEXT_OPENGL_NO_ERROR_KHR);
        contextAttributes.push_back(mConfigParams.noError ? EGL_TRUE : EGL_FALSE);

        if (mConfigParams.webGLCompatibility.valid())
        {
            contextAttributes.push_back(EGL_CONTEXT_WEBGL_COMPATIBILITY_ANGLE);
            contextAttributes.push_back(mConfigParams.webGLCompatibility.value() ? EGL_TRUE
                                                                                 : EGL_FALSE);
        }

        if (mConfigParams.extensionsEnabled.valid())
        {
            contextAttributes.push_back(EGL_EXTENSIONS_ENABLED_ANGLE);
            contextAttributes.push_back(mConfigParams.extensionsEnabled.value() ? EGL_TRUE
                                                                                : EGL_FALSE);
        }

        if (hasRobustness)
        {
            contextAttributes.push_back(EGL_CONTEXT_OPENGL_ROBUST_ACCESS_EXT);
            contextAttributes.push_back(mConfigParams.robustAccess ? EGL_TRUE : EGL_FALSE);
        }

        if (hasBindGeneratesResource)
        {
            contextAttributes.push_back(EGL_CONTEXT_BIND_GENERATES_RESOURCE_CHROMIUM);
            contextAttributes.push_back(mConfigParams.bindGeneratesResource ? EGL_TRUE : EGL_FALSE);
        }

        if (hasClientArraysExtension)
        {
            contextAttributes.push_back(EGL_CONTEXT_CLIENT_ARRAYS_ENABLED_ANGLE);
            contextAttributes.push_back(mConfigParams.clientArraysEnabled ? EGL_TRUE : EGL_FALSE);
        }

        if (mConfigParams.contextProgramCacheEnabled.valid())
        {
            contextAttributes.push_back(EGL_CONTEXT_PROGRAM_BINARY_CACHE_ENABLED_ANGLE);
            contextAttributes.push_back(
                mConfigParams.contextProgramCacheEnabled.value() ? EGL_TRUE : EGL_FALSE);
        }

        bool hasRobustResourceInit =
            strstr(displayExtensions, "EGL_ANGLE_robust_resource_initialization") != nullptr;
        if (hasRobustResourceInit && mConfigParams.robustResourceInit.valid())
        {
            contextAttributes.push_back(EGL_ROBUST_RESOURCE_INITIALIZATION_ANGLE);
            contextAttributes.push_back(mConfigParams.robustResourceInit.value() ? EGL_TRUE
                                                                                 : EGL_FALSE);
        }
    }
    contextAttributes.push_back(EGL_NONE);

    EGLContext context = eglCreateContext(mDisplay, mConfig, nullptr, &contextAttributes[0]);
    if (eglGetError() != EGL_SUCCESS)
    {
        std::cerr << "Error on eglCreateContext.\n";
        return EGL_NO_CONTEXT;
    }

    return context;
}

bool EGLWindow::initializeContext()
{
    mContext = createContext(EGL_NO_CONTEXT);
    if (mContext == EGL_NO_CONTEXT)
    {
        destroyGL();
        return false;
    }

    eglMakeCurrent(mDisplay, mSurface, mSurface, mContext);
    if (eglGetError() != EGL_SUCCESS)
    {
        std::cerr << "Error during eglMakeCurrent.\n";
        destroyGL();
        return false;
    }

    if (mConfigParams.swapInterval != -1)
    {
        eglSwapInterval(mDisplay, mConfigParams.swapInterval);
    }

    return true;
}

void EGLWindow::destroyGL()
{
    destroyContext();
    destroySurface();

    if (mDisplay != EGL_NO_DISPLAY)
    {
        eglMakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
        eglTerminate(mDisplay);
        mDisplay = EGL_NO_DISPLAY;
    }
}

void EGLWindow::destroySurface()
{
    if (mSurface != EGL_NO_SURFACE)
    {
        eglMakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
        assert(mDisplay != EGL_NO_DISPLAY);
        eglDestroySurface(mDisplay, mSurface);
        mSurface = EGL_NO_SURFACE;
    }
}

void EGLWindow::destroyContext()
{
    if (mContext != EGL_NO_CONTEXT)
    {
        eglMakeCurrent(mDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);
        assert(mDisplay != EGL_NO_DISPLAY);
        eglDestroyContext(mDisplay, mContext);
        mContext = EGL_NO_CONTEXT;
    }
}

bool EGLWindow::isGLInitialized() const
{
    return mSurface != EGL_NO_SURFACE && mContext != EGL_NO_CONTEXT && mDisplay != EGL_NO_DISPLAY;
}

// Find an EGLConfig that is an exact match for the specified attributes. EGL_FALSE is returned if
// the EGLConfig is found.  This indicates that the EGLConfig is not supported.
EGLBoolean EGLWindow::FindEGLConfig(EGLDisplay dpy, const EGLint *attrib_list, EGLConfig *config)
{
    EGLint numConfigs = 0;
    eglGetConfigs(dpy, nullptr, 0, &numConfigs);
    std::vector<EGLConfig> allConfigs(numConfigs);
    eglGetConfigs(dpy, allConfigs.data(), static_cast<EGLint>(allConfigs.size()), &numConfigs);

    for (size_t i = 0; i < allConfigs.size(); i++)
    {
        bool matchFound = true;
        for (const EGLint *curAttrib = attrib_list; curAttrib[0] != EGL_NONE; curAttrib += 2)
        {
            if (curAttrib[1] == EGL_DONT_CARE)
            {
                continue;
            }

            EGLint actualValue = EGL_DONT_CARE;
            eglGetConfigAttrib(dpy, allConfigs[i], curAttrib[0], &actualValue);
            if (curAttrib[1] != actualValue)
            {
                matchFound = false;
                break;
            }
        }

        if (matchFound)
        {
            *config = allConfigs[i];
            return EGL_TRUE;
        }
    }

    return EGL_FALSE;
}

void EGLWindow::makeCurrent()
{
    eglMakeCurrent(mDisplay, mSurface, mSurface, mContext);
}

bool EGLWindow::hasError() const
{
    return eglGetError() != EGL_SUCCESS;
}

// static
bool EGLWindow::ClientExtensionEnabled(const std::string &extName)
{
    return CheckExtensionExists(eglQueryString(EGL_NO_DISPLAY, EGL_EXTENSIONS), extName);
}

bool CheckExtensionExists(const char *allExtensions, const std::string &extName)
{
    const std::string paddedExtensions = std::string(" ") + allExtensions + std::string(" ");
    return paddedExtensions.find(std::string(" ") + extName + std::string(" ")) !=
           std::string::npos;
}

// static
void GLWindowBase::Delete(GLWindowBase **window)
{
    delete *window;
    *window = nullptr;
}

// static
EGLWindow *EGLWindow::New(EGLint glesMajorVersion,
                          EGLint glesMinorVersion,
                          const EGLPlatformParameters &platform)
{
    return new EGLWindow(glesMajorVersion, glesMinorVersion, platform);
}

// static
void EGLWindow::Delete(EGLWindow **window)
{
    delete *window;
    *window = nullptr;
}
kc3-lang/angle/util/EGLWindow.cpp

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kc3-lang/angle /util/EGLWindow.cpp
