refactor EGL source code

no changes is functionality. split various objects into their own files.
make egl_display objec's lock internal.

1 files changed, 1464 insertions, 0 deletions

diff --git a/opengl/libs/EGL/eglApi.cpp b/opengl/libs/EGL/eglApi.cpp
new file mode 100644
index 0000000..210c24d
--- /dev/null
+++ b/opengl/libs/EGL/eglApi.cpp
@@ -0,0 +1,1464 @@
+/* 
+ ** Copyright 2007, The Android Open Source Project
+ **
+ ** Licensed under the Apache License, Version 2.0 (the "License"); 
+ ** you may not use this file except in compliance with the License. 
+ ** You may obtain a copy of the License at 
+ **
+ **     http://www.apache.org/licenses/LICENSE-2.0 
+ **
+ ** Unless required by applicable law or agreed to in writing, software 
+ ** distributed under the License is distributed on an "AS IS" BASIS, 
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 
+ ** See the License for the specific language governing permissions and 
+ ** limitations under the License.
+ */
+
+#include <ctype.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <hardware/gralloc.h>
+#include <system/window.h>
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <GLES/gl.h>
+#include <GLES/glext.h>
+
+#include <cutils/log.h>
+#include <cutils/atomic.h>
+#include <cutils/properties.h>
+#include <cutils/memory.h>
+
+#include <utils/KeyedVector.h>
+#include <utils/SortedVector.h>
+#include <utils/String8.h>
+
+#include "egl_impl.h"
+#include "egl_tls.h"
+#include "glesv2dbg.h"
+#include "hooks.h"
+
+#include "egl_display.h"
+#include "egl_impl.h"
+#include "egl_object.h"
+#include "egl_tls.h"
+
+using namespace android;
+
+// ----------------------------------------------------------------------------
+
+static char const * const sVendorString     = "Android";
+static char const * const sVersionString    = "1.4 Android META-EGL";
+static char const * const sClientApiString  = "OpenGL ES";
+static char const * const sExtensionString  =
+        "EGL_KHR_image "
+        "EGL_KHR_image_base "
+        "EGL_KHR_image_pixmap "
+        "EGL_KHR_gl_texture_2D_image "
+        "EGL_KHR_gl_texture_cubemap_image "
+        "EGL_KHR_gl_renderbuffer_image "
+        "EGL_KHR_fence_sync "
+        "EGL_ANDROID_image_native_buffer "
+        "EGL_ANDROID_swap_rectangle "
+        ;
+
+struct extention_map_t {
+    const char* name;
+    __eglMustCastToProperFunctionPointerType address;
+};
+
+static const extention_map_t sExtentionMap[] = {
+    { "eglLockSurfaceKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglLockSurfaceKHR },
+    { "eglUnlockSurfaceKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglUnlockSurfaceKHR },
+    { "eglCreateImageKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglCreateImageKHR },
+    { "eglDestroyImageKHR",
+            (__eglMustCastToProperFunctionPointerType)&eglDestroyImageKHR },
+    { "eglSetSwapRectangleANDROID",
+            (__eglMustCastToProperFunctionPointerType)&eglSetSwapRectangleANDROID },
+};
+
+// accesses protected by sExtensionMapMutex
+static DefaultKeyedVector<String8, __eglMustCastToProperFunctionPointerType> sGLExtentionMap;
+static int sGLExtentionSlot = 0;
+static pthread_mutex_t sExtensionMapMutex = PTHREAD_MUTEX_INITIALIZER;
+
+static void(*findProcAddress(const char* name,
+        const extention_map_t* map, size_t n))() {
+    for (uint32_t i=0 ; i<n ; i++) {
+        if (!strcmp(name, map[i].name)) {
+            return map[i].address;
+        }
+    }
+    return NULL;
+}
+
+// ----------------------------------------------------------------------------
+
+template<typename T>
+static __attribute__((noinline))
+int binarySearch(T const sortedArray[], int first, int last, T key) {
+    while (first <= last) {
+        int mid = (first + last) / 2;
+        if (sortedArray[mid] < key) {
+            first = mid + 1;
+        } else if (key < sortedArray[mid]) {
+            last = mid - 1;
+        } else {
+            return mid;
+        }
+    }
+    return -1;
+}
+
+// ----------------------------------------------------------------------------
+
+namespace android {
+extern void setGLHooksThreadSpecific(gl_hooks_t const *value);
+extern EGLBoolean egl_init_drivers();
+extern const __eglMustCastToProperFunctionPointerType gExtensionForwarders[MAX_NUMBER_OF_GL_EXTENSIONS];
+extern int gEGLDebugLevel;
+extern gl_hooks_t gHooksTrace;
+extern gl_hooks_t gHooksDebug;
+} // namespace android;
+
+// ----------------------------------------------------------------------------
+
+static inline void clearError() { egl_tls_t::clearError(); }
+static inline EGLContext getContext() { return egl_tls_t::getContext(); }
+
+// ----------------------------------------------------------------------------
+
+EGLDisplay eglGetDisplay(EGLNativeDisplayType display)
+{
+    clearError();
+
+    uint32_t index = uint32_t(display);
+    if (index >= NUM_DISPLAYS) {
+        return setError(EGL_BAD_PARAMETER, EGL_NO_DISPLAY);
+    }
+
+    if (egl_init_drivers() == EGL_FALSE) {
+        return setError(EGL_BAD_PARAMETER, EGL_NO_DISPLAY);
+    }
+
+    EGLDisplay dpy = egl_display_t::getFromNativeDisplay(display);
+    return dpy;
+}
+
+// ----------------------------------------------------------------------------
+// Initialization
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor)
+{
+    clearError();
+
+    egl_display_t * const dp = get_display(dpy);
+    if (!dp) return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+    EGLBoolean res = dp->initialize(major, minor);
+
+    return res;
+}
+
+EGLBoolean eglTerminate(EGLDisplay dpy)
+{
+    // NOTE: don't unload the drivers b/c some APIs can be called
+    // after eglTerminate() has been called. eglTerminate() only
+    // terminates an EGLDisplay, not a EGL itself.
+
+    clearError();
+
+    egl_display_t* const dp = get_display(dpy);
+    if (!dp) return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+    EGLBoolean res = dp->terminate();
+    
+    return res;
+}
+
+// ----------------------------------------------------------------------------
+// configuration
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglGetConfigs(   EGLDisplay dpy,
+                            EGLConfig *configs,
+                            EGLint config_size, EGLint *num_config)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    GLint numConfigs = dp->numTotalConfigs;
+    if (!configs) {
+        *num_config = numConfigs;
+        return EGL_TRUE;
+    }
+
+    GLint n = 0;
+    for (intptr_t i=0 ; i<dp->numTotalConfigs && config_size ; i++) {
+        *configs++ = EGLConfig(i);
+        config_size--;
+        n++;
+    }
+    
+    *num_config = n;
+    return EGL_TRUE;
+}
+
+EGLBoolean eglChooseConfig( EGLDisplay dpy, const EGLint *attrib_list,
+                            EGLConfig *configs, EGLint config_size,
+                            EGLint *num_config)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    if (num_config==0) {
+        return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+    }
+
+    EGLint n;
+    EGLBoolean res = EGL_FALSE;
+    *num_config = 0;
+
+    
+    // It is unfortunate, but we need to remap the EGL_CONFIG_IDs, 
+    // to do this, we have to go through the attrib_list array once
+    // to figure out both its size and if it contains an EGL_CONFIG_ID
+    // key. If so, the full array is copied and patched.
+    // NOTE: we assume that there can be only one occurrence
+    // of EGL_CONFIG_ID.
+    
+    EGLint patch_index = -1;
+    GLint attr;
+    size_t size = 0;
+    if (attrib_list) {
+        while ((attr=attrib_list[size]) != EGL_NONE) {
+            if (attr == EGL_CONFIG_ID)
+                patch_index = size;
+            size += 2;
+        }
+    }
+    if (patch_index >= 0) {
+        size += 2; // we need copy the sentinel as well
+        EGLint* new_list = (EGLint*)malloc(size*sizeof(EGLint));
+        if (new_list == 0)
+            return setError(EGL_BAD_ALLOC, EGL_FALSE);
+        memcpy(new_list, attrib_list, size*sizeof(EGLint));
+
+        // patch the requested EGL_CONFIG_ID
+        bool found = false;
+        EGLConfig ourConfig(0);
+        EGLint& configId(new_list[patch_index+1]);
+        for (intptr_t i=0 ; i<dp->numTotalConfigs ; i++) {
+            if (dp->configs[i].configId == configId) {
+                ourConfig = EGLConfig(i);
+                configId = dp->configs[i].implConfigId;
+                found = true;
+                break;
+            }
+        }
+
+        egl_connection_t* const cnx = &gEGLImpl[dp->configs[intptr_t(ourConfig)].impl];
+        if (found && cnx->dso) {
+            // and switch to the new list
+            attrib_list = const_cast<const EGLint *>(new_list);
+
+            // At this point, the only configuration that can match is
+            // dp->configs[i][index], however, we don't know if it would be
+            // rejected because of the other attributes, so we do have to call
+            // cnx->egl.eglChooseConfig() -- but we don't have to loop
+            // through all the EGLimpl[].
+            // We also know we can only get a single config back, and we know
+            // which one.
+
+            res = cnx->egl.eglChooseConfig(
+                    dp->disp[ dp->configs[intptr_t(ourConfig)].impl ].dpy,
+                    attrib_list, configs, config_size, &n);
+            if (res && n>0) {
+                // n has to be 0 or 1, by construction, and we already know
+                // which config it will return (since there can be only one).
+                if (configs) {
+                    configs[0] = ourConfig;
+                }
+                *num_config = 1;
+            }
+        }
+
+        free(const_cast<EGLint *>(attrib_list));
+        return res;
+    }
+
+
+    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            if (cnx->egl.eglChooseConfig(
+                    dp->disp[i].dpy, attrib_list, configs, config_size, &n)) {
+                if (configs) {
+                    // now we need to convert these client EGLConfig to our
+                    // internal EGLConfig format.
+                    // This is done in O(n Log(n)) time.
+                    for (int j=0 ; j<n ; j++) {
+                        egl_config_t key(i, configs[j]);
+                        intptr_t index = binarySearch<egl_config_t>(
+                                dp->configs, 0, dp->numTotalConfigs, key);
+                        if (index >= 0) {
+                            configs[j] = EGLConfig(index);
+                        } else {
+                            return setError(EGL_BAD_CONFIG, EGL_FALSE);
+                        }
+                    }
+                    configs += n;
+                    config_size -= n;
+                }
+                *num_config += n;
+                res = EGL_TRUE;
+            }
+        }
+    }
+    return res;
+}
+
+EGLBoolean eglGetConfigAttrib(EGLDisplay dpy, EGLConfig config,
+        EGLint attribute, EGLint *value)
+{
+    clearError();
+
+    egl_display_t const* dp = 0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp);
+    if (!cnx) return EGL_FALSE;
+    
+    if (attribute == EGL_CONFIG_ID) {
+        *value = dp->configs[intptr_t(config)].configId;
+        return EGL_TRUE;
+    }
+    return cnx->egl.eglGetConfigAttrib(
+            dp->disp[ dp->configs[intptr_t(config)].impl ].dpy,
+            dp->configs[intptr_t(config)].config, attribute, value);
+}
+
+// ----------------------------------------------------------------------------
+// surfaces
+// ----------------------------------------------------------------------------
+
+EGLSurface eglCreateWindowSurface(  EGLDisplay dpy, EGLConfig config,
+                                    NativeWindowType window,
+                                    const EGLint *attrib_list)
+{
+    clearError();
+
+    egl_display_t const* dp = 0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp);
+    if (cnx) {
+        EGLDisplay iDpy = dp->disp[ dp->configs[intptr_t(config)].impl ].dpy;
+        EGLConfig iConfig = dp->configs[intptr_t(config)].config;
+        EGLint format;
+
+        // set the native window's buffers format to match this config
+        if (cnx->egl.eglGetConfigAttrib(iDpy,
+                iConfig, EGL_NATIVE_VISUAL_ID, &format)) {
+            if (format != 0) {
+                native_window_set_buffers_geometry(window, 0, 0, format);
+            }
+        }
+
+        EGLSurface surface = cnx->egl.eglCreateWindowSurface(
+                iDpy, iConfig, window, attrib_list);
+        if (surface != EGL_NO_SURFACE) {
+            egl_surface_t* s = new egl_surface_t(dpy, config, window, surface,
+                    dp->configs[intptr_t(config)].impl, cnx);
+            return s;
+        }
+    }
+    return EGL_NO_SURFACE;
+}
+
+EGLSurface eglCreatePixmapSurface(  EGLDisplay dpy, EGLConfig config,
+                                    NativePixmapType pixmap,
+                                    const EGLint *attrib_list)
+{
+    clearError();
+
+    egl_display_t const* dp = 0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp);
+    if (cnx) {
+        EGLSurface surface = cnx->egl.eglCreatePixmapSurface(
+                dp->disp[ dp->configs[intptr_t(config)].impl ].dpy,
+                dp->configs[intptr_t(config)].config, pixmap, attrib_list);
+        if (surface != EGL_NO_SURFACE) {
+            egl_surface_t* s = new egl_surface_t(dpy, config, NULL, surface,
+                    dp->configs[intptr_t(config)].impl, cnx);
+            return s;
+        }
+    }
+    return EGL_NO_SURFACE;
+}
+
+EGLSurface eglCreatePbufferSurface( EGLDisplay dpy, EGLConfig config,
+                                    const EGLint *attrib_list)
+{
+    clearError();
+
+    egl_display_t const* dp = 0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp);
+    if (cnx) {
+        EGLSurface surface = cnx->egl.eglCreatePbufferSurface(
+                dp->disp[ dp->configs[intptr_t(config)].impl ].dpy,
+                dp->configs[intptr_t(config)].config, attrib_list);
+        if (surface != EGL_NO_SURFACE) {
+            egl_surface_t* s = new egl_surface_t(dpy, config, NULL, surface,
+                    dp->configs[intptr_t(config)].impl, cnx);
+            return s;
+        }
+    }
+    return EGL_NO_SURFACE;
+}
+                                    
+EGLBoolean eglDestroySurface(EGLDisplay dpy, EGLSurface surface)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SurfaceRef _s(surface);
+    if (!_s.get()) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+
+    egl_surface_t * const s = get_surface(surface);
+    EGLBoolean result = s->cnx->egl.eglDestroySurface(
+            dp->disp[s->impl].dpy, s->surface);
+    if (result == EGL_TRUE) {
+        if (s->win != NULL) {
+            native_window_set_buffers_geometry(s->win.get(), 0, 0, 0);
+        }
+        _s.terminate();
+    }
+    return result;
+}
+
+EGLBoolean eglQuerySurface( EGLDisplay dpy, EGLSurface surface,
+                            EGLint attribute, EGLint *value)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SurfaceRef _s(surface);
+    if (!_s.get()) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_surface_t const * const s = get_surface(surface);
+
+    EGLBoolean result(EGL_TRUE);
+    if (attribute == EGL_CONFIG_ID) {
+        // We need to remap EGL_CONFIG_IDs
+        *value = dp->configs[intptr_t(s->config)].configId;
+    } else {
+        result = s->cnx->egl.eglQuerySurface(
+                dp->disp[s->impl].dpy, s->surface, attribute, value);
+    }
+
+    return result;
+}
+
+// ----------------------------------------------------------------------------
+// Contexts
+// ----------------------------------------------------------------------------
+
+EGLContext eglCreateContext(EGLDisplay dpy, EGLConfig config,
+                            EGLContext share_list, const EGLint *attrib_list)
+{
+    clearError();
+
+    egl_display_t const* dp = 0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp);
+    if (cnx) {
+        if (share_list != EGL_NO_CONTEXT) {
+            egl_context_t* const c = get_context(share_list);
+            share_list = c->context;
+        }
+        EGLContext context = cnx->egl.eglCreateContext(
+                dp->disp[ dp->configs[intptr_t(config)].impl ].dpy,
+                dp->configs[intptr_t(config)].config,
+                share_list, attrib_list);
+        if (context != EGL_NO_CONTEXT) {
+            // figure out if it's a GLESv1 or GLESv2
+            int version = 0;
+            if (attrib_list) {
+                while (*attrib_list != EGL_NONE) {
+                    GLint attr = *attrib_list++;
+                    GLint value = *attrib_list++;
+                    if (attr == EGL_CONTEXT_CLIENT_VERSION) {
+                        if (value == 1) {
+                            version = GLESv1_INDEX;
+                        } else if (value == 2) {
+                            version = GLESv2_INDEX;
+                        }
+                    }
+                };
+            }
+            egl_context_t* c = new egl_context_t(dpy, context, config,
+                    dp->configs[intptr_t(config)].impl, cnx, version);
+            return c;
+        }
+    }
+    return EGL_NO_CONTEXT;
+}
+
+EGLBoolean eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    ContextRef _c(ctx);
+    if (!_c.get()) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+    
+    if (!validate_display_context(dpy, ctx))
+        return EGL_FALSE;
+    egl_context_t * const c = get_context(ctx);
+    EGLBoolean result = c->cnx->egl.eglDestroyContext(
+            dp->disp[c->impl].dpy, c->context);
+    if (result == EGL_TRUE) {
+        _c.terminate();
+    }
+    return result;
+}
+
+static void loseCurrent(egl_context_t * cur_c)
+{
+    if (cur_c) {
+        egl_surface_t * cur_r = get_surface(cur_c->read);
+        egl_surface_t * cur_d = get_surface(cur_c->draw);
+
+        // by construction, these are either 0 or valid (possibly terminated)
+        // it should be impossible for these to be invalid
+        ContextRef _cur_c(cur_c);
+        SurfaceRef _cur_r(cur_r);
+        SurfaceRef _cur_d(cur_d);
+
+        cur_c->read = NULL;
+        cur_c->draw = NULL;
+
+        _cur_c.release();
+        _cur_r.release();
+        _cur_d.release();
+    }
+}
+
+EGLBoolean eglMakeCurrent(  EGLDisplay dpy, EGLSurface draw,
+                            EGLSurface read, EGLContext ctx)
+{
+    clearError();
+
+    egl_display_t const * const dp = get_display(dpy);
+    if (!dp) return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+    /* If ctx is not EGL_NO_CONTEXT, read is not EGL_NO_SURFACE, or draw is not
+       EGL_NO_SURFACE, then an EGL_NOT_INITIALIZED error is generated if dpy is
+       a valid but uninitialized display. */
+    if ( (ctx != EGL_NO_CONTEXT) || (read != EGL_NO_SURFACE) ||
+         (draw != EGL_NO_SURFACE) ) {
+        if (!dp->isReady()) return setError(EGL_NOT_INITIALIZED, EGL_FALSE);
+    }
+
+    // get a reference to the object passed in
+    ContextRef _c(ctx);
+    SurfaceRef _d(draw);
+    SurfaceRef _r(read);
+
+    // validate the context (if not EGL_NO_CONTEXT)
+    if ((ctx != EGL_NO_CONTEXT) && (!validate_display_context(dpy, ctx))) {
+        // EGL_NO_CONTEXT is valid
+        return EGL_FALSE;
+    }
+
+    // these are the underlying implementation's object
+    EGLContext impl_ctx  = EGL_NO_CONTEXT;
+    EGLSurface impl_draw = EGL_NO_SURFACE;
+    EGLSurface impl_read = EGL_NO_SURFACE;
+
+    // these are our objects structs passed in
+    egl_context_t       * c = NULL;
+    egl_surface_t const * d = NULL;
+    egl_surface_t const * r = NULL;
+
+    // these are the current objects structs
+    egl_context_t * cur_c = get_context(getContext());
+    
+    if (ctx != EGL_NO_CONTEXT) {
+        c = get_context(ctx);
+        impl_ctx = c->context;
+    } else {
+        // no context given, use the implementation of the current context
+        if (cur_c == NULL) {
+            // no current context
+            if (draw != EGL_NO_SURFACE || read != EGL_NO_SURFACE) {
+                // calling eglMakeCurrent( ..., !=0, !=0, EGL_NO_CONTEXT);
+                return setError(EGL_BAD_MATCH, EGL_FALSE);
+            }
+            // not an error, there is just no current context.
+            return EGL_TRUE;
+        }
+    }
+
+    // retrieve the underlying implementation's draw EGLSurface
+    if (draw != EGL_NO_SURFACE) {
+        d = get_surface(draw);
+        // make sure the EGLContext and EGLSurface passed in are for
+        // the same driver
+        if (c && d->impl != c->impl)
+            return setError(EGL_BAD_MATCH, EGL_FALSE);
+        impl_draw = d->surface;
+    }
+
+    // retrieve the underlying implementation's read EGLSurface
+    if (read != EGL_NO_SURFACE) {
+        r = get_surface(read);
+        // make sure the EGLContext and EGLSurface passed in are for
+        // the same driver
+        if (c && r->impl != c->impl)
+            return setError(EGL_BAD_MATCH, EGL_FALSE);
+        impl_read = r->surface;
+    }
+
+    EGLBoolean result;
+
+    if (c) {
+        result = c->cnx->egl.eglMakeCurrent(
+                dp->disp[c->impl].dpy, impl_draw, impl_read, impl_ctx);
+    } else {
+        result = cur_c->cnx->egl.eglMakeCurrent(
+                dp->disp[cur_c->impl].dpy, impl_draw, impl_read, impl_ctx);
+    }
+
+    if (result == EGL_TRUE) {
+
+        loseCurrent(cur_c);
+
+        if (ctx != EGL_NO_CONTEXT) {
+            setGLHooksThreadSpecific(c->cnx->hooks[c->version]);
+            egl_tls_t::setContext(ctx);
+            if (gEGLDebugLevel > 0) {
+                CreateDbgContext(c->version, c->cnx->hooks[c->version]);
+            }
+            _c.acquire();
+            _r.acquire();
+            _d.acquire();
+            c->read = read;
+            c->draw = draw;
+        } else {
+            setGLHooksThreadSpecific(&gHooksNoContext);
+            egl_tls_t::setContext(EGL_NO_CONTEXT);
+        }
+    }
+    return result;
+}
+
+
+EGLBoolean eglQueryContext( EGLDisplay dpy, EGLContext ctx,
+                            EGLint attribute, EGLint *value)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    ContextRef _c(ctx);
+    if (!_c.get()) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+
+    if (!validate_display_context(dpy, ctx))
+        return EGL_FALSE;    
+    
+    egl_context_t * const c = get_context(ctx);
+
+    EGLBoolean result(EGL_TRUE);
+    if (attribute == EGL_CONFIG_ID) {
+        *value = dp->configs[intptr_t(c->config)].configId;
+    } else {
+        // We need to remap EGL_CONFIG_IDs
+        result = c->cnx->egl.eglQueryContext(
+                dp->disp[c->impl].dpy, c->context, attribute, value);
+    }
+
+    return result;
+}
+
+EGLContext eglGetCurrentContext(void)
+{
+    // could be called before eglInitialize(), but we wouldn't have a context
+    // then, and this function would correctly return EGL_NO_CONTEXT.
+
+    clearError();
+
+    EGLContext ctx = getContext();
+    return ctx;
+}
+
+EGLSurface eglGetCurrentSurface(EGLint readdraw)
+{
+    // could be called before eglInitialize(), but we wouldn't have a context
+    // then, and this function would correctly return EGL_NO_SURFACE.
+
+    clearError();
+
+    EGLContext ctx = getContext();
+    if (ctx) {
+        egl_context_t const * const c = get_context(ctx);
+        if (!c) return setError(EGL_BAD_CONTEXT, EGL_NO_SURFACE);
+        switch (readdraw) {
+            case EGL_READ: return c->read;
+            case EGL_DRAW: return c->draw;            
+            default: return setError(EGL_BAD_PARAMETER, EGL_NO_SURFACE);
+        }
+    }
+    return EGL_NO_SURFACE;
+}
+
+EGLDisplay eglGetCurrentDisplay(void)
+{
+    // could be called before eglInitialize(), but we wouldn't have a context
+    // then, and this function would correctly return EGL_NO_DISPLAY.
+
+    clearError();
+
+    EGLContext ctx = getContext();
+    if (ctx) {
+        egl_context_t const * const c = get_context(ctx);
+        if (!c) return setError(EGL_BAD_CONTEXT, EGL_NO_SURFACE);
+        return c->dpy;
+    }
+    return EGL_NO_DISPLAY;
+}
+
+EGLBoolean eglWaitGL(void)
+{
+    // could be called before eglInitialize(), but we wouldn't have a context
+    // then, and this function would return GL_TRUE, which isn't wrong.
+
+    clearError();
+
+    EGLBoolean res = EGL_TRUE;
+    EGLContext ctx = getContext();
+    if (ctx) {
+        egl_context_t const * const c = get_context(ctx);
+        if (!c) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+        if (uint32_t(c->impl)>=2)
+            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+        egl_connection_t* const cnx = &gEGLImpl[c->impl];
+        if (!cnx->dso) 
+            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+        res = cnx->egl.eglWaitGL();
+    }
+    return res;
+}
+
+EGLBoolean eglWaitNative(EGLint engine)
+{
+    // could be called before eglInitialize(), but we wouldn't have a context
+    // then, and this function would return GL_TRUE, which isn't wrong.
+
+    clearError();
+
+    EGLBoolean res = EGL_TRUE;
+    EGLContext ctx = getContext();
+    if (ctx) {
+        egl_context_t const * const c = get_context(ctx);
+        if (!c) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+        if (uint32_t(c->impl)>=2)
+            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+        egl_connection_t* const cnx = &gEGLImpl[c->impl];
+        if (!cnx->dso) 
+            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+        res = cnx->egl.eglWaitNative(engine);
+    }
+    return res;
+}
+
+EGLint eglGetError(void)
+{
+    EGLint result = EGL_SUCCESS;
+    EGLint err;
+    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
+        err = EGL_SUCCESS;
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso)
+            err = cnx->egl.eglGetError();
+        if (err!=EGL_SUCCESS && result==EGL_SUCCESS)
+            result = err;
+    }
+    err = egl_tls_t::getError();
+    if (result == EGL_SUCCESS)
+        result = err;
+    return result;
+}
+
+// Note: Similar implementations of these functions also exist in
+// gl2.cpp and gl.cpp, and are used by applications that call the
+// exported entry points directly.
+typedef void (GL_APIENTRYP PFNGLEGLIMAGETARGETTEXTURE2DOESPROC) (GLenum target, GLeglImageOES image);
+typedef void (GL_APIENTRYP PFNGLEGLIMAGETARGETRENDERBUFFERSTORAGEOESPROC) (GLenum target, GLeglImageOES image);
+
+static PFNGLEGLIMAGETARGETTEXTURE2DOESPROC glEGLImageTargetTexture2DOES_impl = NULL;
+static PFNGLEGLIMAGETARGETRENDERBUFFERSTORAGEOESPROC glEGLImageTargetRenderbufferStorageOES_impl = NULL;
+
+static void glEGLImageTargetTexture2DOES_wrapper(GLenum target, GLeglImageOES image)
+{
+    GLeglImageOES implImage =
+        (GLeglImageOES)egl_get_image_for_current_context((EGLImageKHR)image);
+    glEGLImageTargetTexture2DOES_impl(target, implImage);
+}
+
+static void glEGLImageTargetRenderbufferStorageOES_wrapper(GLenum target, GLeglImageOES image)
+{
+    GLeglImageOES implImage =
+        (GLeglImageOES)egl_get_image_for_current_context((EGLImageKHR)image);
+    glEGLImageTargetRenderbufferStorageOES_impl(target, implImage);
+}
+
+__eglMustCastToProperFunctionPointerType eglGetProcAddress(const char *procname)
+{
+    // eglGetProcAddress() could be the very first function called
+    // in which case we must make sure we've initialized ourselves, this
+    // happens the first time egl_get_display() is called.
+
+    clearError();
+
+    if (egl_init_drivers() == EGL_FALSE) {
+        setError(EGL_BAD_PARAMETER, NULL);
+        return  NULL;
+    }
+
+    __eglMustCastToProperFunctionPointerType addr;
+    addr = findProcAddress(procname, sExtentionMap, NELEM(sExtentionMap));
+    if (addr) return addr;
+
+    // this protects accesses to sGLExtentionMap and sGLExtentionSlot
+    pthread_mutex_lock(&sExtensionMapMutex);
+
+        /*
+         * Since eglGetProcAddress() is not associated to anything, it needs
+         * to return a function pointer that "works" regardless of what
+         * the current context is.
+         *
+         * For this reason, we return a "forwarder", a small stub that takes
+         * care of calling the function associated with the context
+         * currently bound.
+         *
+         * We first look for extensions we've already resolved, if we're seeing
+         * this extension for the first time, we go through all our
+         * implementations and call eglGetProcAddress() and record the
+         * result in the appropriate implementation hooks and return the
+         * address of the forwarder corresponding to that hook set.
+         *
+         */
+
+        const String8 name(procname);
+        addr = sGLExtentionMap.valueFor(name);
+        const int slot = sGLExtentionSlot;
+
+        LOGE_IF(slot >= MAX_NUMBER_OF_GL_EXTENSIONS,
+                "no more slots for eglGetProcAddress(\"%s\")",
+                procname);
+
+        if (!addr && (slot < MAX_NUMBER_OF_GL_EXTENSIONS)) {
+            bool found = false;
+            for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
+                egl_connection_t* const cnx = &gEGLImpl[i];
+                if (cnx->dso && cnx->egl.eglGetProcAddress) {
+                    found = true;
+                    // Extensions are independent of the bound context
+                    cnx->hooks[GLESv1_INDEX]->ext.extensions[slot] =
+                    cnx->hooks[GLESv2_INDEX]->ext.extensions[slot] =
+#if EGL_TRACE
+                    gHooksDebug.ext.extensions[slot] = gHooksTrace.ext.extensions[slot] =
+#endif
+                            cnx->egl.eglGetProcAddress(procname);
+                }
+            }
+            if (found) {
+                addr = gExtensionForwarders[slot];
+
+                if (!strcmp(procname, "glEGLImageTargetTexture2DOES")) {
+                    glEGLImageTargetTexture2DOES_impl = (PFNGLEGLIMAGETARGETTEXTURE2DOESPROC)addr;
+                    addr = (__eglMustCastToProperFunctionPointerType)glEGLImageTargetTexture2DOES_wrapper;
+                }
+                if (!strcmp(procname, "glEGLImageTargetRenderbufferStorageOES")) {
+                    glEGLImageTargetRenderbufferStorageOES_impl = (PFNGLEGLIMAGETARGETRENDERBUFFERSTORAGEOESPROC)addr;
+                    addr = (__eglMustCastToProperFunctionPointerType)glEGLImageTargetRenderbufferStorageOES_wrapper;
+                }
+
+                sGLExtentionMap.add(name, addr);
+                sGLExtentionSlot++;
+            }
+        }
+
+    pthread_mutex_unlock(&sExtensionMapMutex);
+    return addr;
+}
+
+EGLBoolean eglSwapBuffers(EGLDisplay dpy, EGLSurface draw)
+{
+    EGLBoolean Debug_eglSwapBuffers(EGLDisplay dpy, EGLSurface draw);
+    if (gEGLDebugLevel > 0)
+        Debug_eglSwapBuffers(dpy, draw);
+
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SurfaceRef _s(draw);
+    if (!_s.get()) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+
+    if (!validate_display_surface(dpy, draw))
+        return EGL_FALSE;    
+    egl_surface_t const * const s = get_surface(draw);
+    return s->cnx->egl.eglSwapBuffers(dp->disp[s->impl].dpy, s->surface);
+}
+
+EGLBoolean eglCopyBuffers(  EGLDisplay dpy, EGLSurface surface,
+                            NativePixmapType target)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SurfaceRef _s(surface);
+    if (!_s.get()) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_surface_t const * const s = get_surface(surface);
+    return s->cnx->egl.eglCopyBuffers(
+            dp->disp[s->impl].dpy, s->surface, target);
+}
+
+const char* eglQueryString(EGLDisplay dpy, EGLint name)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return (const char *) NULL;
+
+    switch (name) {
+        case EGL_VENDOR:
+            return sVendorString;
+        case EGL_VERSION:
+            return sVersionString;
+        case EGL_EXTENSIONS:
+            return sExtensionString;
+        case EGL_CLIENT_APIS:
+            return sClientApiString;
+    }
+    return setError(EGL_BAD_PARAMETER, (const char *)0);
+}
+
+
+// ----------------------------------------------------------------------------
+// EGL 1.1
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglSurfaceAttrib(
+        EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SurfaceRef _s(surface);
+    if (!_s.get()) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_surface_t const * const s = get_surface(surface);
+    if (s->cnx->egl.eglSurfaceAttrib) {
+        return s->cnx->egl.eglSurfaceAttrib(
+                dp->disp[s->impl].dpy, s->surface, attribute, value);
+    }
+    return setError(EGL_BAD_SURFACE, EGL_FALSE);
+}
+
+EGLBoolean eglBindTexImage(
+        EGLDisplay dpy, EGLSurface surface, EGLint buffer)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SurfaceRef _s(surface);
+    if (!_s.get()) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_surface_t const * const s = get_surface(surface);
+    if (s->cnx->egl.eglBindTexImage) {
+        return s->cnx->egl.eglBindTexImage(
+                dp->disp[s->impl].dpy, s->surface, buffer);
+    }
+    return setError(EGL_BAD_SURFACE, EGL_FALSE);
+}
+
+EGLBoolean eglReleaseTexImage(
+        EGLDisplay dpy, EGLSurface surface, EGLint buffer)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SurfaceRef _s(surface);
+    if (!_s.get()) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_surface_t const * const s = get_surface(surface);
+    if (s->cnx->egl.eglReleaseTexImage) {
+        return s->cnx->egl.eglReleaseTexImage(
+                dp->disp[s->impl].dpy, s->surface, buffer);
+    }
+    return setError(EGL_BAD_SURFACE, EGL_FALSE);
+}
+
+EGLBoolean eglSwapInterval(EGLDisplay dpy, EGLint interval)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    EGLBoolean res = EGL_TRUE;
+    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            if (cnx->egl.eglSwapInterval) {
+                if (cnx->egl.eglSwapInterval(
+                        dp->disp[i].dpy, interval) == EGL_FALSE) {
+                    res = EGL_FALSE;
+                }
+            }
+        }
+    }
+    return res;
+}
+
+
+// ----------------------------------------------------------------------------
+// EGL 1.2
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglWaitClient(void)
+{
+    clearError();
+
+    // could be called before eglInitialize(), but we wouldn't have a context
+    // then, and this function would return GL_TRUE, which isn't wrong.
+    EGLBoolean res = EGL_TRUE;
+    EGLContext ctx = getContext();
+    if (ctx) {
+        egl_context_t const * const c = get_context(ctx);
+        if (!c) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+        if (uint32_t(c->impl)>=2)
+            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+        egl_connection_t* const cnx = &gEGLImpl[c->impl];
+        if (!cnx->dso) 
+            return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+        if (cnx->egl.eglWaitClient) {
+            res = cnx->egl.eglWaitClient();
+        } else {
+            res = cnx->egl.eglWaitGL();
+        }
+    }
+    return res;
+}
+
+EGLBoolean eglBindAPI(EGLenum api)
+{
+    clearError();
+
+    if (egl_init_drivers() == EGL_FALSE) {
+        return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+    }
+
+    // bind this API on all EGLs
+    EGLBoolean res = EGL_TRUE;
+    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            if (cnx->egl.eglBindAPI) {
+                if (cnx->egl.eglBindAPI(api) == EGL_FALSE) {
+                    res = EGL_FALSE;
+                }
+            }
+        }
+    }
+    return res;
+}
+
+EGLenum eglQueryAPI(void)
+{
+    clearError();
+
+    if (egl_init_drivers() == EGL_FALSE) {
+        return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+    }
+
+    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            if (cnx->egl.eglQueryAPI) {
+                // the first one we find is okay, because they all
+                // should be the same
+                return cnx->egl.eglQueryAPI();
+            }
+        }
+    }
+    // or, it can only be OpenGL ES
+    return EGL_OPENGL_ES_API;
+}
+
+EGLBoolean eglReleaseThread(void)
+{
+    clearError();
+
+    // If there is context bound to the thread, release it
+    loseCurrent(get_context(getContext()));
+
+    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            if (cnx->egl.eglReleaseThread) {
+                cnx->egl.eglReleaseThread();
+            }
+        }
+    }
+    egl_tls_t::clearTLS();
+    dbgReleaseThread();
+    return EGL_TRUE;
+}
+
+EGLSurface eglCreatePbufferFromClientBuffer(
+          EGLDisplay dpy, EGLenum buftype, EGLClientBuffer buffer,
+          EGLConfig config, const EGLint *attrib_list)
+{
+    clearError();
+
+    egl_display_t const* dp = 0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp);
+    if (!cnx) return EGL_FALSE;
+    if (cnx->egl.eglCreatePbufferFromClientBuffer) {
+        return cnx->egl.eglCreatePbufferFromClientBuffer(
+                dp->disp[ dp->configs[intptr_t(config)].impl ].dpy,
+                buftype, buffer,
+                dp->configs[intptr_t(config)].config, attrib_list);
+    }
+    return setError(EGL_BAD_CONFIG, EGL_NO_SURFACE);
+}
+
+// ----------------------------------------------------------------------------
+// EGL_EGLEXT_VERSION 3
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglLockSurfaceKHR(EGLDisplay dpy, EGLSurface surface,
+        const EGLint *attrib_list)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SurfaceRef _s(surface);
+    if (!_s.get()) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;
+
+    egl_surface_t const * const s = get_surface(surface);
+
+    if (s->cnx->egl.eglLockSurfaceKHR) {
+        return s->cnx->egl.eglLockSurfaceKHR(
+                dp->disp[s->impl].dpy, s->surface, attrib_list);
+    }
+    return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+}
+
+EGLBoolean eglUnlockSurfaceKHR(EGLDisplay dpy, EGLSurface surface)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SurfaceRef _s(surface);
+    if (!_s.get()) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;
+
+    egl_surface_t const * const s = get_surface(surface);
+
+    if (s->cnx->egl.eglUnlockSurfaceKHR) {
+        return s->cnx->egl.eglUnlockSurfaceKHR(
+                dp->disp[s->impl].dpy, s->surface);
+    }
+    return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+}
+
+EGLImageKHR eglCreateImageKHR(EGLDisplay dpy, EGLContext ctx, EGLenum target,
+        EGLClientBuffer buffer, const EGLint *attrib_list)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_NO_IMAGE_KHR;
+
+    if (ctx != EGL_NO_CONTEXT) {
+        ContextRef _c(ctx);
+        if (!_c.get()) return setError(EGL_BAD_CONTEXT, EGL_NO_IMAGE_KHR);
+        if (!validate_display_context(dpy, ctx))
+            return EGL_NO_IMAGE_KHR;
+        egl_context_t * const c = get_context(ctx);
+        // since we have an EGLContext, we know which implementation to use
+        EGLImageKHR image = c->cnx->egl.eglCreateImageKHR(
+                dp->disp[c->impl].dpy, c->context, target, buffer, attrib_list);
+        if (image == EGL_NO_IMAGE_KHR)
+            return image;
+            
+        egl_image_t* result = new egl_image_t(dpy, ctx);
+        result->images[c->impl] = image;
+        return (EGLImageKHR)result;
+    } else {
+        // EGL_NO_CONTEXT is a valid parameter
+
+        /* Since we don't have a way to know which implementation to call,
+         * we're calling all of them. If at least one of the implementation
+         * succeeded, this is a success.
+         */
+
+        EGLint currentError = eglGetError();
+
+        EGLImageKHR implImages[IMPL_NUM_IMPLEMENTATIONS];
+        bool success = false;
+        for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
+            egl_connection_t* const cnx = &gEGLImpl[i];
+            implImages[i] = EGL_NO_IMAGE_KHR;
+            if (cnx->dso) {
+                if (cnx->egl.eglCreateImageKHR) {
+                    implImages[i] = cnx->egl.eglCreateImageKHR(
+                            dp->disp[i].dpy, ctx, target, buffer, attrib_list);
+                    if (implImages[i] != EGL_NO_IMAGE_KHR) {
+                        success = true;
+                    }
+                }
+            }
+        }
+
+        if (!success) {
+            // failure, if there was an error when we entered this function,
+            // the error flag must not be updated.
+            // Otherwise, the error is whatever happened in the implementation
+            // that faulted.
+            if (currentError != EGL_SUCCESS) {
+                setError(currentError, EGL_NO_IMAGE_KHR);
+            }
+            return EGL_NO_IMAGE_KHR;
+        } else {
+            // In case of success, we need to clear all error flags
+            // (especially those caused by the implementation that didn't
+            // succeed). TODO: we could avoid this if we knew this was
+            // a "full" success (all implementation succeeded).
+            eglGetError();
+        }
+
+        egl_image_t* result = new egl_image_t(dpy, ctx);
+        memcpy(result->images, implImages, sizeof(implImages));
+        return (EGLImageKHR)result;
+    }
+}
+
+EGLBoolean eglDestroyImageKHR(EGLDisplay dpy, EGLImageKHR img)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    ImageRef _i(img);
+    if (!_i.get()) return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+
+    egl_image_t* image = get_image(img);
+    bool success = false;
+    for (int i=0 ; i<IMPL_NUM_IMPLEMENTATIONS ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (image->images[i] != EGL_NO_IMAGE_KHR) {
+            if (cnx->dso) {
+                if (cnx->egl.eglDestroyImageKHR) {
+                    if (cnx->egl.eglDestroyImageKHR(
+                            dp->disp[i].dpy, image->images[i])) {
+                        success = true;
+                    }
+                }
+            }
+        }
+    }
+    if (!success)
+        return EGL_FALSE;
+
+    _i.terminate();
+
+    return EGL_TRUE;
+}
+
+// ----------------------------------------------------------------------------
+// EGL_EGLEXT_VERSION 5
+// ----------------------------------------------------------------------------
+
+
+EGLSyncKHR eglCreateSyncKHR(EGLDisplay dpy, EGLenum type, const EGLint *attrib_list)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_NO_SYNC_KHR;
+
+    EGLContext ctx = eglGetCurrentContext();
+    ContextRef _c(ctx);
+    if (!_c.get()) return setError(EGL_BAD_CONTEXT, EGL_NO_SYNC_KHR);
+    if (!validate_display_context(dpy, ctx))
+        return EGL_NO_SYNC_KHR;
+    egl_context_t * const c = get_context(ctx);
+    EGLSyncKHR result = EGL_NO_SYNC_KHR;
+    if (c->cnx->egl.eglCreateSyncKHR) {
+        EGLSyncKHR sync = c->cnx->egl.eglCreateSyncKHR(
+                dp->disp[c->impl].dpy, type, attrib_list);
+        if (sync == EGL_NO_SYNC_KHR)
+            return sync;
+        result = (egl_sync_t*)new egl_sync_t(dpy, ctx, sync);
+    }
+    return (EGLSyncKHR)result;
+}
+
+EGLBoolean eglDestroySyncKHR(EGLDisplay dpy, EGLSyncKHR sync)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SyncRef _s(sync);
+    if (!_s.get()) return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+    egl_sync_t* syncObject = get_sync(sync);
+
+    EGLContext ctx = syncObject->context;
+    ContextRef _c(ctx);
+    if (!_c.get()) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+    if (!validate_display_context(dpy, ctx))
+        return EGL_FALSE;
+
+    EGLBoolean result = EGL_FALSE;
+    egl_context_t * const c = get_context(ctx);
+    if (c->cnx->egl.eglDestroySyncKHR) {
+        result = c->cnx->egl.eglDestroySyncKHR(
+                dp->disp[c->impl].dpy, syncObject->sync);
+        if (result)
+            _s.terminate();
+    }
+    return result;
+}
+
+EGLint eglClientWaitSyncKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLint flags, EGLTimeKHR timeout)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SyncRef _s(sync);
+    if (!_s.get()) return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+    egl_sync_t* syncObject = get_sync(sync);
+
+    EGLContext ctx = syncObject->context;
+    ContextRef _c(ctx);
+    if (!_c.get()) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+    if (!validate_display_context(dpy, ctx))
+        return EGL_FALSE;
+
+    egl_context_t * const c = get_context(ctx);
+
+    if (c->cnx->egl.eglClientWaitSyncKHR) {
+        return c->cnx->egl.eglClientWaitSyncKHR(
+                dp->disp[c->impl].dpy, syncObject->sync, flags, timeout);
+    }
+
+    return EGL_FALSE;
+}
+
+EGLBoolean eglGetSyncAttribKHR(EGLDisplay dpy, EGLSyncKHR sync, EGLint attribute, EGLint *value)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SyncRef _s(sync);
+    if (!_s.get()) return setError(EGL_BAD_PARAMETER, EGL_FALSE);
+    egl_sync_t* syncObject = get_sync(sync);
+
+    EGLContext ctx = syncObject->context;
+    ContextRef _c(ctx);
+    if (!_c.get()) return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+    if (!validate_display_context(dpy, ctx))
+        return EGL_FALSE;
+
+    egl_context_t * const c = get_context(ctx);
+
+    if (c->cnx->egl.eglGetSyncAttribKHR) {
+        return c->cnx->egl.eglGetSyncAttribKHR(
+                dp->disp[c->impl].dpy, syncObject->sync, attribute, value);
+    }
+
+    return EGL_FALSE;
+}
+
+// ----------------------------------------------------------------------------
+// ANDROID extensions
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglSetSwapRectangleANDROID(EGLDisplay dpy, EGLSurface draw,
+        EGLint left, EGLint top, EGLint width, EGLint height)
+{
+    clearError();
+
+    egl_display_t const * const dp = validate_display(dpy);
+    if (!dp) return EGL_FALSE;
+
+    SurfaceRef _s(draw);
+    if (!_s.get()) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+
+    if (!validate_display_surface(dpy, draw))
+        return EGL_FALSE;    
+    egl_surface_t const * const s = get_surface(draw);
+    if (s->cnx->egl.eglSetSwapRectangleANDROID) {
+        return s->cnx->egl.eglSetSwapRectangleANDROID(
+                dp->disp[s->impl].dpy, s->surface, left, top, width, height);
+    }
+    return setError(EGL_BAD_DISPLAY, NULL);
+}