2012-12-21  Kondapally Kalyan  <kalyan.kondapally@intel.com>

        [EFL][WebGL] Implement EGL support with GLX.

        https://bugs.webkit.org/show_bug.cgi?id=105602

        Reviewed by NOBODY (OOPS!).

        Adds support for EGL with GLX backend. EGL support can be enabled during compile time

        by passing -DENABLE_EGL=ON as cmake config parameter.

        * Source/cmake/OptionsEfl.cmake:

2012-12-21  Kondapally Kalyan  <kalyan.kondapally@intel.com>

        [EFL][WebGL] Implement EGL support with GLX.

        https://bugs.webkit.org/show_bug.cgi?id=105602

        Reviewed by NOBODY (OOPS!).

        This is in preparation for adding GLES2 support.

        This patch adds support for EGL with GLX backend. EGL support can be enabled during compile time

        by passing -DENABLE_EGL=ON as cmake config parameter. This is disabled by default.

        * PlatformEfl.cmake:

        * platform/graphics/opengl/GLDefs.h:

        (WebCore):

        * platform/graphics/opengl/GLPlatformContext.cpp:

        (WebCore):

        (WebCore::GLPlatformContext::createContext):

        (WebCore::GLPlatformContext::createOffScreenContext):

        (WebCore::GLPlatformContext::createCurrentContextWrapper):

        * platform/graphics/opengl/GLPlatformContext.h:

        * platform/graphics/opengl/GLPlatformSurface.cpp:

        (WebCore::GLPlatformSurface::createTransportSurface):

        EGL implementation for Context Management.

        * platform/graphics/surfaces/egl/EGLContext.cpp: Added.

        (WebCore):

        (WebCore::isRobustnessExtSupported):

        (WebCore::EGLCurrentContextWrapper::EGLCurrentContextWrapper):

        (WebCore::EGLCurrentContextWrapper::handle):

        (WebCore::EGLOffScreenContext::EGLOffScreenContext):

        (WebCore::EGLOffScreenContext::initialize):

        (WebCore::EGLOffScreenContext::~EGLOffScreenContext):

        (WebCore::EGLOffScreenContext::isCurrentContext):

        (WebCore::EGLOffScreenContext::platformMakeCurrent):

        (WebCore::EGLOffScreenContext::platformReleaseCurrent):

        (WebCore::EGLOffScreenContext::freeResources):

        (WebCore::EGLOffScreenContext::destroy):

        * platform/graphics/surfaces/egl/EGLContext.h:

        (WebCore):

        (EGLCurrentContextWrapper):

        (WebCore::EGLCurrentContextWrapper::~EGLCurrentContextWrapper):

        (EGLOffScreenContext):

        EGL implementation for Offscreen Surface.

        * platform/graphics/surfaces/egl/EGLSurface.cpp: Added.

        (WebCore):

        (WebCore::EGLTransportSurface::EGLTransportSurface):

        (WebCore::EGLTransportSurface::~EGLTransportSurface):

        (WebCore::EGLTransportSurface::configuration):

        (WebCore::EGLTransportSurface::swapBuffers):

        (WebCore::EGLTransportSurface::destroy):

        (WebCore::EGLTransportSurface::freeEGLResources):

        * platform/graphics/surfaces/egl/EGLSurface.h:

        (WebCore):

        (EGLTransportSurface):

        X integration.

        * platform/graphics/surfaces/glx/EGLXWindowResources.h: Added.

        (WebCore):

        (SharedEGLResources):

        (WebCore::SharedEGLResources::create):

        (WebCore::SharedEGLResources::nativeDisplay):

        (WebCore::SharedEGLResources::pBufferContextConfig):

        (WebCore::SharedEGLResources::surfaceContextConfig):

        (WebCore::SharedEGLResources::SharedEGLResources):

        (WebCore::SharedEGLResources::cleanup):

        (WebCore::SharedEGLResources::createConfig):

        (WebCore::SharedEGLResources::~SharedEGLResources):

        * platform/graphics/surfaces/glx/X11WindowResources.cpp:

        * platform/graphics/surfaces/glx/X11WindowResources.h:

    if (WTF_USE_EGL)

        list(APPEND WebCore_INCLUDE_DIRECTORIES

            ${EGL_INCLUDE_DIR}

            "${WEBCORE_DIR}/platform/graphics/surfaces/egl"

    )

    endif ()

    if (WTF_USE_EGL)

        list(APPEND WebCore_SOURCES

            platform/graphics/surfaces/egl/EGLSurface.cpp

            platform/graphics/surfaces/egl/EGLContext.cpp

        )

    endif ()

    if (WTF_USE_GLX)

        list(APPEND WebCore_SOURCES

            platform/graphics/surfaces/glx/GLXSurface.cpp

            platform/graphics/surfaces/glx/GLXContext.cpp

        )

    endif ()

    if (WTF_USE_EGL)

        list(APPEND WebCore_LIBRARIES

            ${EGL_LIBRARY}

        )

    endif ()

#if USE(EGL)

#define EGL_EGLEXT_PROTOTYPES 1

#include <EGL/egl.h>

#include <EGL/eglext.h>

#endif

#elif USE(EGL)

#if USE(OPENGL_ES_2)

static const EGLenum eglAPIVersion = EGL_OPENGL_ES_API;

#else

static const EGLenum eglAPIVersion = EGL_OPENGL_API;

#endif

typedef EGLContext PlatformContext;

typedef EGLDisplay PlatformDisplay;

typedef EGLConfig PlatformSurfaceConfig;

typedef EGLSurface PlatformDrawable;

#elif USE(EGL)

#include "EGLContext.h"

    if (!glGetGraphicsResetStatusARB) {

#endif

#if USE(EGL)

#include "EGLSurface.h"

#endif

#elif USE(EGL)

    OwnPtr<GLPlatformSurface> surface = adoptPtr(new EGLTransportSurface());

#endif

/*

 * Copyright (C) 2012 Intel Corporation. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "EGLContext.h"

#if USE(ACCELERATED_COMPOSITING) && USE(EGL)

#include <wtf/text/WTFString.h>

#if HAVE(GLX)

#include <GL/glx.h>

#endif

namespace WebCore {

static const EGLint contextAttributes[] = {

#if USE(OPENGL_ES_2)

    EGL_CONTEXT_CLIENT_VERSION, 2,

#endif

    EGL_NONE

};

static const EGLint contextRobustnessAttributes[] = {

#if USE(OPENGL_ES_2)

    EGL_CONTEXT_CLIENT_VERSION, 2,

#endif

    EGL_CONTEXT_OPENGL_RESET_NOTIFICATION_STRATEGY_EXT,

    EGL_LOSE_CONTEXT_ON_RESET_EXT,

    EGL_NONE

};

static bool isRobustnessExtSupported(EGLDisplay display)

{

    static bool queryDone = false;

    static bool isEGLEXTsupported = false;

    if (!queryDone) {

        queryDone = true;

        String supportedExtensions = reinterpret_cast<const char*>(eglQueryString(display, EGL_EXTENSIONS));

        if (!supportedExtensions.isEmpty()) {

            supportedExtensions.append(" ");

            isEGLEXTsupported = supportedExtensions.contains("EGL_EXT_create_context_robustness ");

        }

    }

    return isEGLEXTsupported;

}

EGLCurrentContextWrapper::EGLCurrentContextWrapper()

    : GLPlatformContext()

{

}

// FIXME: This is a temporary workaround till we are able to build evas with EGL support

PlatformContext EGLCurrentContextWrapper::handle() const

{

    return glXGetCurrentContext();

}

EGLOffScreenContext::EGLOffScreenContext()

    : GLPlatformContext()

    , m_display(0)

{

}

bool EGLOffScreenContext::initialize(GLPlatformSurface* surface)

{

    if (!surface)

        return false;

    if (!eglBindAPI(eglAPIVersion)) {

        LOG_ERROR("Failed to set EGL API(%d).\n", eglGetError());

        return false;

    }

    m_display = surface->sharedDisplay();

    if (!m_display)

        return false;

    EGLConfig config = surface->configuration();

    if (!config)

        return false;

    if (config) {

        if (isRobustnessExtSupported(m_display))

            m_contextHandle = eglCreateContext(m_display, config, EGL_NO_CONTEXT, contextRobustnessAttributes);

        if (!m_contextHandle && m_contextHandle != EGL_NO_CONTEXT)

            m_resetLostContext = true;

        else

            m_contextHandle = eglCreateContext(m_display, config, EGL_NO_CONTEXT, contextAttributes);

        if (m_contextHandle && m_contextHandle != EGL_NO_CONTEXT)

            return true;

    }

    return false;

}

EGLOffScreenContext::~EGLOffScreenContext()

{

}

bool EGLOffScreenContext::isCurrentContext() const

{

    return m_contextHandle == eglGetCurrentContext();

}

bool EGLOffScreenContext::platformMakeCurrent(GLPlatformSurface* surface)

{

    if (!eglBindAPI(eglAPIVersion)) {

        LOG_ERROR("Failed to set EGL API(%d).\n", eglGetError());

        return false;

    }

    if (!eglMakeCurrent(m_display, surface->drawable(), surface->drawable(), m_contextHandle)) {

        LOG_ERROR("Failed to make context current.(%d).\n", eglGetError());

        if (m_resetLostContext && eglGetError() == EGL_CONTEXT_LOST) {

            LOG_ERROR("Lost current context.\n");

            m_contextLost = true;

        }

        return false;

    }

    return true;

}

void EGLOffScreenContext::platformReleaseCurrent()

{

    eglMakeCurrent(m_display, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);

}

void EGLOffScreenContext::freeResources()

{

    if (m_contextHandle)

        eglDestroyContext(m_display, m_contextHandle);

    m_contextHandle = 0;

    m_display = 0;

}

void EGLOffScreenContext::destroy()

{

    GLPlatformContext::destroy();

    freeResources();

}

}

#endif

/*

 * Copyright (C) 2012 Intel Corporation. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef EGLContext_h

#define EGLContext_h

#if USE(ACCELERATED_COMPOSITING) && USE(EGL)

#include "GLPlatformContext.h"

namespace WebCore {

class EGLCurrentContextWrapper : public GLPlatformContext {

    WTF_MAKE_NONCOPYABLE(EGLCurrentContextWrapper);

public:

    EGLCurrentContextWrapper();

    PlatformContext handle() const;

    virtual ~EGLCurrentContextWrapper() { }

};

class EGLOffScreenContext : public GLPlatformContext {

    WTF_MAKE_NONCOPYABLE(EGLOffScreenContext);

public:

    EGLOffScreenContext();

    virtual ~EGLOffScreenContext();

    bool initialize(GLPlatformSurface*);

    bool platformMakeCurrent(GLPlatformSurface*);

    void platformReleaseCurrent();

    void destroy();

    bool isCurrentContext() const;

private:

    void freeResources();

    EGLDisplay m_display;

};

}

#endif

#endif

/*

 * Copyright (C) 2012 Intel Corporation. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "config.h"

#include "EGLSurface.h"

#if USE(ACCELERATED_COMPOSITING) && USE(EGL) && USE(GRAPHICS_SURFACE)

namespace WebCore {

EGLTransportSurface::EGLTransportSurface()

    : X11OffScreenWindow()

{

    if (m_sharedDisplay == EGL_NO_DISPLAY) {

        LOG_ERROR("No valid hardware display found.\n");

        return;

    }

    if (!configuration()) {

        destroy();

        return;

    }

    createOffscreenWindow();

    if (!m_bufferHandle) {

        LOG_ERROR("Failed to create XWindow.\n");

        destroy();

        return;

    }

    m_drawable = eglCreateWindowSurface(m_sharedResources->nativeDisplay(), configuration(), (EGLNativeWindowType)m_bufferHandle, 0);

    if (m_drawable == EGL_NO_SURFACE) {

        LOG_ERROR("Failed to create EGL surface(%d).\n", eglGetError());

        destroy();

    }

}

EGLTransportSurface::~EGLTransportSurface()

{

}

PlatformSurfaceConfig EGLTransportSurface::configuration()

{

    return m_sharedResources->surfaceContextConfig();

}

void EGLTransportSurface::swapBuffers()

{

    if (!m_drawable)

        return;

    EGLBoolean success = eglBindAPI(eglAPIVersion);

    if (success != EGL_TRUE) {

        LOG_ERROR("Failed to set EGL API(%d).\n", eglGetError());

        destroy();

    }

    success = eglSwapBuffers(sharedDisplay(), m_drawable);

    if (success != EGL_TRUE) {

        LOG_ERROR("Failed to SwapBuffers(%d).\n", eglGetError());

        destroy();

    }

}

void EGLTransportSurface::destroy()

{

    destroyWindow();

    freeEGLResources();

}

void EGLTransportSurface::freeEGLResources()

{

    if (m_drawable == EGL_NO_SURFACE)

        return;

    EGLBoolean eglResult = eglBindAPI(eglAPIVersion);

    if (eglResult != EGL_TRUE) {

        LOG_ERROR("Failed to set EGL API(%d).\n", eglGetError());

        return;

    }

    eglDestroySurface(sharedDisplay(), m_drawable);

    m_drawable = EGL_NO_SURFACE;

}

}

#endif

/*

 * Copyright (C) 2012 Intel Corporation. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef EGLSurface_h

#define EGLSurface_h

#if USE(ACCELERATED_COMPOSITING) && USE(EGL) && USE(GRAPHICS_SURFACE)

#include <glx/EGLXWindowResources.h>

#include <wtf/Noncopyable.h>

#include <wtf/RefCounted.h>

namespace WebCore {

class EGLTransportSurface : public X11OffScreenWindow {

    WTF_MAKE_NONCOPYABLE(EGLTransportSurface);

public:

    EGLTransportSurface();

    virtual ~EGLTransportSurface();

    PlatformSurfaceConfig configuration();

    void swapBuffers();

    void destroy();

private:

    void freeEGLResources();

};

}

#endif

#endif

/*

 * Copyright (C) 2012 Intel Corporation. All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''

 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,

 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS

 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR

 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF

 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS

 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN

 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)

 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF

 * THE POSSIBILITY OF SUCH DAMAGE.

 */

#ifndef EGLXWindowResources_h

#define EGLXWindowResources_h

#include "X11WindowResources.h"

#if USE(ACCELERATED_COMPOSITING) && USE(EGL)

#include <opengl/GLDefs.h>

namespace WebCore {

class SharedEGLResources : public SharedX11Resources {

public:

    static PassRefPtr<SharedEGLResources> create()

    {

        if (!m_staticSharedResource)

            m_staticSharedResource = new SharedEGLResources();

        else

            m_staticSharedResource->ref();

        return adoptRef(m_staticSharedResource);

    }

    PlatformDisplay nativeDisplay()

    {

        if (m_eglDisplay == EGL_NO_DISPLAY) {

            EGLBoolean success;

            m_eglDisplay = eglGetDisplay(reinterpret_cast<EGLNativeDisplayType>(SharedX11Resources::x11Display()));

            if (m_eglDisplay == EGL_NO_DISPLAY) {

                LOG_ERROR("EGLDisplay Initialization failed.\n");

                return m_eglDisplay;

            }

            success = eglInitialize(m_eglDisplay, 0, 0);

            if (success != EGL_TRUE) {

                LOG_ERROR("EGLInitialization failed.\n");

                cleanup();

                return m_eglDisplay;

            }

            success = eglBindAPI(eglAPIVersion);

            if (success != EGL_TRUE) {

                LOG_ERROR("failed to set EGL API(%d).\n", eglGetError());

                cleanup();

            }

        }

        return m_eglDisplay;

    }

    virtual EGLConfig pBufferContextConfig()

    {

        if (!m_pbufferfbConfig) {

            EGLint attributeList[] = {

#if USE(OPENGL_ES_2)

                EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,

#else

                EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,

#endif

                EGL_RED_SIZE, 8,

                EGL_GREEN_SIZE, 8,

                EGL_BLUE_SIZE, 8,

                EGL_STENCIL_SIZE, 8,

                EGL_ALPHA_SIZE, 8,

                EGL_SURFACE_TYPE, EGL_PIXMAP_BIT,

                EGL_NONE

            };

            m_pbufferfbConfig = createConfig(attributeList);

        }

        return m_pbufferfbConfig;

    }

    virtual EGLConfig surfaceContextConfig()

    {

        if (!m_surfaceContextfbConfig) {

            EGLint attributeList[] = {

                EGL_LEVEL, 0,

#if USE(OPENGL_ES_2)

                EGL_RENDERABLE_TYPE, EGL_OPENGL_ES2_BIT,

#else

                EGL_RENDERABLE_TYPE, EGL_OPENGL_BIT,

#endif

                EGL_RED_SIZE, 8,

                EGL_GREEN_SIZE, 8,

                EGL_BLUE_SIZE, 8,

                EGL_STENCIL_SIZE, 8,

                EGL_ALPHA_SIZE, 8,

                EGL_DEPTH_SIZE, 8,

                EGL_SURFACE_TYPE, EGL_WINDOW_BIT,

                EGL_NONE

            };

            m_surfaceContextfbConfig = createConfig(attributeList);

        }

        return m_surfaceContextfbConfig;

    }

private:

    SharedEGLResources()

        : SharedX11Resources()

    {

        m_eglDisplay = EGL_NO_DISPLAY;

        m_surfaceContextfbConfig = 0;

        m_pbufferfbConfig = 0;

    }

    void cleanup()

    {

        eglMakeCurrent(m_eglDisplay, EGL_NO_SURFACE, EGL_NO_SURFACE, EGL_NO_CONTEXT);

        eglTerminate(m_eglDisplay);

        m_eglDisplay = EGL_NO_DISPLAY;

    }

    EGLConfig createConfig(const int attributes[])

    {

        if (m_eglDisplay == EGL_NO_DISPLAY) {

            // Try to initialize Display if already not done.

            nativeDisplay();

            if (m_eglDisplay == EGL_NO_DISPLAY)

                return 0;

        }

        int numConfigs;

        EGLConfig rightConfig = 0;

        if (!eglChooseConfig(m_eglDisplay, attributes, &rightConfig, 1, &numConfigs)) {

            LOG_ERROR("Failed to get supported configirations.\n");

            cleanup();

        }

        if (numConfigs != 1) {

            LOG_ERROR("EGLChooseConfig didn't return exactly one config but (%d).\n", numConfigs);

            cleanup();

        }

        VisualID visualId = 0;

        EGLint eglValue = 0;

        // Check if EGL provides us with a valid visual id.

        eglGetConfigAttrib(m_eglDisplay, rightConfig, EGL_NATIVE_VISUAL_ID, &eglValue);

        visualId = static_cast<VisualID>(eglValue);

        if (visualId) {

            // EGL has suggested a visual id, so get the rest of the visual info for that id.

            XVisualInfo visualInfoTemplate;

            memset(&visualInfoTemplate, 0, sizeof(XVisualInfo));

            visualInfoTemplate.visualid = visualId;

            XVisualInfo *chosenVisualInfo;

            int matchingCount = 0;

            chosenVisualInfo = XGetVisualInfo(x11Display(), VisualIDMask, &visualInfoTemplate, &matchingCount);

            if (chosenVisualInfo) {

#if USE(GRAPHICS_SURFACE)

                if (m_supportsXRenderExtension) {

                    XRenderPictFormat* format = XRenderFindVisualFormat(x11Display(), chosenVisualInfo->visual);

                    if (format && format->direct.alphaMask > 0)

                        m_VisualInfo = chosenVisualInfo;

                }

#endif

                if (!m_VisualInfo && chosenVisualInfo->depth == 32)

                    m_VisualInfo = chosenVisualInfo;

            }

            if (!m_VisualInfo) {

                XVisualInfo visualInfoTemplate;

                memset(&visualInfoTemplate, 0, sizeof(XVisualInfo));

                XVisualInfo *matchingVisuals;

                int matchingCount = 0;

                visualInfoTemplate.depth = chosenVisualInfo->depth;

                matchingVisuals = XGetVisualInfo(x11Display(), VisualDepthMask, &visualInfoTemplate, &matchingCount);

                if (matchingVisuals) {

                    m_VisualInfo = &matchingVisuals[0];

                    XFree(matchingVisuals);

                }

            }

        }

        if (!m_VisualInfo) {

            LOG_ERROR("Failed to get Visual Info.\n");

            cleanup();

        }

        return rightConfig;

    }

    virtual ~SharedEGLResources()

    {

        if (m_eglDisplay == EGL_NO_DISPLAY)

            return;

        if (m_surfaceContextfbConfig)

            m_surfaceContextfbConfig = 0;

        eglTerminate(m_eglDisplay);

        m_eglDisplay = EGL_NO_DISPLAY;

    }

protected:

    EGLDisplay m_eglDisplay;

    EGLConfig m_pbufferfbConfig;

    EGLConfig m_surfaceContextfbConfig;

};

}

#endif

#endif

#if USE(GLX)

#endif

#if USE(EGL)

#include "EGLXWindowResources.h"

#endif

#if USE(GLX)

#elif USE(EGL)

class SharedEGLResources;

typedef SharedEGLResources PlatformSharedResources;

#endif

    if (EGL_FOUND)

        set(WTF_USE_EGL 1)

        add_definitions(-DWTF_USE_EGL=1)

     elseif (OPENGLX_FOUND)

         set(WTF_USE_GLX 1)

         add_definitions(-DWTF_USE_GLX=1)

    endif ()

     if ((OPENGLX_FOUND OR EGL_FOUND) AND X11_Xcomposite_FOUND AND X11_Xrender_FOUND)

         set(USE_GRAPHICS_SURFACE 1)

     endif ()