EGLWindow.cpp

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Author : Jamie Madill
Date : 2019-04-30 16:14:43
Hash : 0659c991
Message : Set swap interval explicitly. The swap interval can be changed independent of the Surface config. Thus it makes more sense to set it explicitly in test setup. This simplifies the test config. Also updates some of the API for GLWindowBase. Return an explicit error from makeCurrent. Bug: angleproject:3393 Change-Id: Ic62b33018e872bc0e38f2848e2427ed898b60749 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/1574672 Reviewed-by: Geoff Lang <geofflang@chromium.org> Reviewed-by: Yuly Novikov <ynovikov@chromium.org> Commit-Queue: Jamie Madill <jmadill@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),
      componentType(EGL_COLOR_COMPONENT_TYPE_FIXED_EXT),
      multisample(false),
      debug(false),
      noError(false),
      bindGeneratesResource(true),
      clientArraysEnabled(true),
      robustAccess(false),
      samples(-1),
      resetStrategy(EGL_NO_RESET_NOTIFICATION_EXT)
{}

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;
    if (!initializeContext())
        return false;
    return true;
}

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 ||
         mConfigParams.resetStrategy != EGL_NO_RESET_NOTIFICATION_EXT) &&
        !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);

            contextAttributes.push_back(EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT);
            contextAttributes.push_back(mConfigParams.resetStrategy);
        }

        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;
    }

    if (!makeCurrent())
    {
        destroyGL();
        return false;
    }

    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;
}

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

    return true;
}

bool EGLWindow::setSwapInterval(EGLint swapInterval)
{
    if (eglSwapInterval(mDisplay, swapInterval) == EGL_FALSE || eglGetError() != EGL_SUCCESS)
    {
        std::cerr << "Error during eglSwapInterval.\n";
        return false;
    }

    return true;
}

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
