Initial Contribution

1 files changed, 1663 insertions, 0 deletions

diff --git a/opengl/libGLES_CM/gl_wrapper.cpp b/opengl/libGLES_CM/gl_wrapper.cpp
new file mode 100644
index 000000000000..5da4f9a222bf
--- /dev/null
+++ b/opengl/libGLES_CM/gl_wrapper.cpp
@@ -0,0 +1,1663 @@
+/* 
+ ** 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.
+ */
+
+#define LOG_TAG "GLLogger"
+
+#include <ctype.h>
+#include <string.h>
+#include <errno.h>
+#include <dlfcn.h>
+
+#include <sys/ioctl.h>
+
+#if HAVE_ANDROID_OS
+#include <linux/android_pmem.h>
+#endif
+
+#include <GLES/egl.h>
+
+#include <cutils/log.h>
+#include <cutils/atomic.h>
+#include <cutils/properties.h>
+#include <cutils/memory.h>
+
+#include <utils/IMemory.h>
+#include <utils/KeyedVector.h>
+#include <utils/threads.h>
+#include <utils/IServiceManager.h>
+#include <utils/IPCThreadState.h>
+#include <utils/Parcel.h>
+
+#include <ui/EGLDisplaySurface.h>
+#include <ui/ISurfaceComposer.h>
+
+#include "gl_logger.h"
+
+#undef NELEM
+
+#define GL_LOGGER                   0
+#define USE_SLOW_BINDING            0
+#define NELEM(x)                    (sizeof(x)/sizeof(*(x)))
+#define MAX_NUMBER_OF_GL_EXTENSIONS 32
+#define MAKE_CONFIG(_impl, _index)  ((EGLConfig)(((_impl)<<24) | (_index)))
+#define setError(_e, _r) setErrorEtc(__FUNCTION__, __LINE__, _e, _r)
+
+// ----------------------------------------------------------------------------
+namespace android {
+// ----------------------------------------------------------------------------
+
+//  EGLDisplay are global, not attached to a given thread
+static const unsigned int NUM_DISPLAYS = 1;
+static const unsigned int IMPL_HARDWARE                 = 0;
+static const unsigned int IMPL_SOFTWARE                 = 1;
+static const unsigned int IMPL_HARDWARE_CONTEXT_LOST    = 2;
+static const unsigned int IMPL_SOFTWARE_CONTEXT_LOST    = 3;
+static const unsigned int IMPL_NO_CONTEXT               = 4;
+
+// ----------------------------------------------------------------------------
+
+struct gl_hooks_t;
+
+struct egl_connection_t
+{
+    void volatile *     dso;
+    gl_hooks_t *        hooks;
+    EGLint              major;
+    EGLint              minor;
+    int                 unavailable;
+};
+
+template <int MAGIC>
+struct egl_object_t
+{
+    egl_object_t() : magic(MAGIC) { }
+    ~egl_object_t() { magic = 0; }
+    bool isValid() const { return magic == MAGIC; }
+private:
+    uint32_t    magic;
+};
+
+struct egl_display_t : public egl_object_t<'_dpy'>
+{
+    EGLDisplay  dpys[2];
+    EGLConfig*  configs[2];
+    EGLint      numConfigs[2];
+    EGLint      numTotalConfigs;
+    char const* extensionsString;
+    volatile int32_t refs;
+    struct strings_t {
+        char const * vendor;
+        char const * version;
+        char const * clientApi;
+        char const * extensions;
+        char const * extensions_config;
+    };
+    strings_t   queryString[2];
+};
+
+struct egl_surface_t : public egl_object_t<'_srf'>
+{
+    egl_surface_t(EGLDisplay dpy, EGLSurface surface,
+            NativeWindowType window, int impl, egl_connection_t const* cnx) 
+    : dpy(dpy), surface(surface), window(window), impl(impl), cnx(cnx)
+    {
+        // NOTE: window must be incRef'ed and connected already
+    }
+    ~egl_surface_t() {
+        if (window) {
+            if (window->disconnect)
+                window->disconnect(window);
+            window->decRef(window);
+        }
+    }
+    EGLDisplay                  dpy;
+    EGLSurface                  surface;
+    NativeWindowType            window;
+    int                         impl;
+    egl_connection_t const*     cnx;
+};
+
+struct egl_context_t : public egl_object_t<'_ctx'>
+{
+    egl_context_t(EGLDisplay dpy, EGLContext context,
+            int impl, egl_connection_t const* cnx) 
+    : dpy(dpy), context(context), read(0), draw(0), impl(impl), cnx(cnx)
+    {
+    }
+    EGLDisplay                  dpy;
+    EGLContext                  context;
+    EGLSurface                  read;
+    EGLSurface                  draw;
+    int                         impl;
+    egl_connection_t const*     cnx;
+};
+
+struct tls_t
+{
+    tls_t() : error(EGL_SUCCESS), ctx(0) { }
+    EGLint      error;
+    EGLContext  ctx;
+};
+
+
+// GL / EGL hooks
+
+typedef void(*proc_t)();
+
+struct gl_hooks_t {
+    struct gl_t {
+        #define GL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__);
+        #include "gl_entries.cpp"
+        #undef GL_ENTRY
+    } gl;
+    struct egl_t {
+        #define EGL_ENTRY(_r, _api, ...) _r (*_api)(__VA_ARGS__);
+        #include "egl_entries.cpp"
+        #undef EGL_ENTRY
+    } egl;
+    struct gl_ext_t {
+        void (*extensions[MAX_NUMBER_OF_GL_EXTENSIONS])(void);
+    } ext;
+};
+
+static char const * const gl_names[] = {
+    #define GL_ENTRY(_r, _api, ...) #_api,
+    #include "gl_entries.cpp"
+    #undef GL_ENTRY
+    NULL
+};
+
+static char const * const egl_names[] = {
+    #define EGL_ENTRY(_r, _api, ...) #_api,
+    #include "egl_entries.cpp"
+    #undef EGL_ENTRY
+    NULL
+};
+
+static void gl_unimplemented() {
+    LOGE("called unimplemented OpenGL ES API");
+}
+
+// ----------------------------------------------------------------------------
+
+static egl_connection_t gEGLImpl[2];
+static egl_display_t gDisplay[NUM_DISPLAYS];
+static gl_hooks_t gHooks[5];
+static pthread_mutex_t gThreadLocalStorageKeyMutex = PTHREAD_MUTEX_INITIALIZER;
+static pthread_key_t gEGLThreadLocalStorageKey = -1;
+
+// ----------------------------------------------------------------------------
+
+#if defined(HAVE_ANDROID_OS) && !USE_SLOW_BINDING && !GL_LOGGER
+
+#include <sys/tls.h>
+// We have a dedicated TLS slot in bionic
+static inline void setGlThreadSpecific(gl_hooks_t const *value) {
+    ((uint32_t *)__get_tls())[TLS_SLOT_OPENGL_API] = (uint32_t)value;
+}
+static gl_hooks_t const* getGlThreadSpecific() {
+    gl_hooks_t const* hooks = (gl_hooks_t const *)(((unsigned const *)__get_tls())[TLS_SLOT_OPENGL_API]);
+    if (hooks) return hooks;
+    return &gHooks[IMPL_NO_CONTEXT];
+}
+
+#else
+
+static pthread_key_t gGLWrapperKey = -1;
+static inline void setGlThreadSpecific(gl_hooks_t const *value) {
+    pthread_setspecific(gGLWrapperKey, value);
+}
+static gl_hooks_t const* getGlThreadSpecific() {
+    gl_hooks_t const* hooks =  static_cast<gl_hooks_t*>(pthread_getspecific(gGLWrapperKey));
+    if (hooks) return hooks;
+    return &gHooks[IMPL_NO_CONTEXT];
+}
+
+#endif
+
+static __attribute__((noinline))
+const char *egl_strerror(EGLint err)
+{
+    switch (err){
+        case EGL_SUCCESS:               return "EGL_SUCCESS";
+        case EGL_NOT_INITIALIZED:       return "EGL_NOT_INITIALIZED";
+        case EGL_BAD_ACCESS:            return "EGL_BAD_ACCESS";
+        case EGL_BAD_ALLOC:             return "EGL_BAD_ALLOC";
+        case EGL_BAD_ATTRIBUTE:         return "EGL_BAD_ATTRIBUTE";
+        case EGL_BAD_CONFIG:            return "EGL_BAD_CONFIG";
+        case EGL_BAD_CONTEXT:           return "EGL_BAD_CONTEXT";
+        case EGL_BAD_CURRENT_SURFACE:   return "EGL_BAD_CURRENT_SURFACE";
+        case EGL_BAD_DISPLAY:           return "EGL_BAD_DISPLAY";
+        case EGL_BAD_MATCH:             return "EGL_BAD_MATCH";
+        case EGL_BAD_NATIVE_PIXMAP:     return "EGL_BAD_NATIVE_PIXMAP";
+        case EGL_BAD_NATIVE_WINDOW:     return "EGL_BAD_NATIVE_WINDOW";
+        case EGL_BAD_PARAMETER:         return "EGL_BAD_PARAMETER";
+        case EGL_BAD_SURFACE:           return "EGL_BAD_SURFACE";
+        case EGL_CONTEXT_LOST:          return "EGL_CONTEXT_LOST";
+        default: return "UNKNOWN";
+    }
+}
+
+static __attribute__((noinline))
+void clearTLS() {
+    if (gEGLThreadLocalStorageKey != -1) {
+        tls_t* tls = (tls_t*)pthread_getspecific(gEGLThreadLocalStorageKey);
+        if (tls) {
+            delete tls;
+            pthread_setspecific(gEGLThreadLocalStorageKey, 0);
+        }
+    }
+}
+
+static tls_t* getTLS()
+{
+    tls_t* tls = (tls_t*)pthread_getspecific(gEGLThreadLocalStorageKey);
+    if (tls == 0) {
+        tls = new tls_t;
+        pthread_setspecific(gEGLThreadLocalStorageKey, tls);
+    }
+    return tls;
+}
+
+template<typename T>
+static __attribute__((noinline))
+T setErrorEtc(const char* caller, int line, EGLint error, T returnValue) {
+    if (gEGLThreadLocalStorageKey == -1) {
+        pthread_mutex_lock(&gThreadLocalStorageKeyMutex);
+        if (gEGLThreadLocalStorageKey == -1)
+            pthread_key_create(&gEGLThreadLocalStorageKey, NULL);
+        pthread_mutex_unlock(&gThreadLocalStorageKeyMutex);
+    }
+    tls_t* tls = getTLS();
+    if (tls->error != error) {
+        LOGE("%s:%d error %x (%s)", caller, line, error, egl_strerror(error));
+        tls->error = error;
+    }
+    return returnValue;
+}
+
+static __attribute__((noinline))
+GLint getError() {
+    if (gEGLThreadLocalStorageKey == -1)
+        return EGL_SUCCESS;
+    tls_t* tls = (tls_t*)pthread_getspecific(gEGLThreadLocalStorageKey);
+    if (!tls) return EGL_SUCCESS;
+    GLint error = tls->error;
+    tls->error = EGL_SUCCESS;
+    return error;
+}
+
+static __attribute__((noinline))
+void setContext(EGLContext ctx) {
+    if (gEGLThreadLocalStorageKey == -1) {
+        pthread_mutex_lock(&gThreadLocalStorageKeyMutex);
+        if (gEGLThreadLocalStorageKey == -1)
+            pthread_key_create(&gEGLThreadLocalStorageKey, NULL);
+        pthread_mutex_unlock(&gThreadLocalStorageKeyMutex);
+    }
+    tls_t* tls = getTLS();
+    tls->ctx = ctx;
+}
+
+static __attribute__((noinline))
+EGLContext getContext() {
+    if (gEGLThreadLocalStorageKey == -1)
+        return EGL_NO_CONTEXT;
+    tls_t* tls = (tls_t*)pthread_getspecific(gEGLThreadLocalStorageKey);
+    if (!tls) return EGL_NO_CONTEXT;
+    return tls->ctx;
+}
+
+/*****************************************************************************/
+
+/*
+ * we provide our own allocators for the GPU regions, these
+ * allocators go through surfaceflinger 
+ */
+
+static Mutex                            gRegionsLock;
+static request_gpu_t                    gRegions;
+static sp<ISurfaceComposer>             gSurfaceManager;
+ISurfaceComposer*                       GLES_localSurfaceManager = 0;
+
+const sp<ISurfaceComposer>& getSurfaceFlinger()
+{
+    Mutex::Autolock _l(gRegionsLock);
+
+    /*
+     * There is a little bit of voodoo magic here. We want to access
+     * surfaceflinger for allocating GPU regions, however, when we are
+     * running as part of surfaceflinger, we want to bypass the
+     * service manager because surfaceflinger might not be registered yet.
+     * SurfaceFlinger will populate "GLES_localSurfaceManager" with its
+     * own address, so we can just use that.
+     */
+    if (gSurfaceManager == 0) {
+        if (GLES_localSurfaceManager) {
+            // we're running in SurfaceFlinger's context
+            gSurfaceManager =  GLES_localSurfaceManager;
+        } else {
+            // we're a remote process or not part of surfaceflinger,
+            // go through the service manager
+            sp<IServiceManager> sm = defaultServiceManager();
+            if (sm != NULL) {
+                sp<IBinder> binder = sm->getService(String16("SurfaceFlinger"));
+                gSurfaceManager = interface_cast<ISurfaceComposer>(binder);
+            }
+        }
+    }
+    return gSurfaceManager;
+}
+
+class GPURevokeRequester : public BnGPUCallback
+{
+public:
+    virtual void gpuLost() {
+        LOGD("CONTEXT_LOST: Releasing GPU upon request from SurfaceFlinger.");
+        gEGLImpl[IMPL_HARDWARE].hooks = &gHooks[IMPL_HARDWARE_CONTEXT_LOST];
+    }
+};
+
+static sp<GPURevokeRequester> gRevokerCallback;
+
+static request_gpu_t* gpu_acquire(void* user)
+{
+    sp<ISurfaceComposer> server( getSurfaceFlinger() );
+
+    Mutex::Autolock _l(gRegionsLock);
+    if (server == NULL) {
+        return 0;
+    }
+    
+    ISurfaceComposer::gpu_info_t info;
+    gRevokerCallback = new GPURevokeRequester();
+    status_t err = server->requestGPU(gRevokerCallback, &info);
+    if (err != NO_ERROR) {
+        LOGD("requestGPU returned %d", err);
+        return 0;
+    }
+
+    bool failed = false;
+    request_gpu_t* gpu = &gRegions;
+    memset(gpu, 0, sizeof(*gpu));
+    
+    if (info.regs != 0) {
+        sp<IMemoryHeap> heap(info.regs->getMemory());
+        if (heap != 0) {
+            int fd = heap->heapID();
+            gpu->regs.fd = fd;
+            gpu->regs.base = info.regs->pointer(); 
+            gpu->regs.size = info.regs->size(); 
+            gpu->regs.user = info.regs.get();
+#if HAVE_ANDROID_OS
+            struct pmem_region region;
+            if (ioctl(fd, PMEM_GET_PHYS, &region) >= 0)
+                gpu->regs.phys = (void*)region.offset;
+#endif
+            info.regs->incStrong(gpu);
+        } else {
+            LOGE("GPU register handle %p is invalid!", info.regs.get());
+            failed = true;
+        }
+    }
+
+    for (size_t i=0 ; i<info.count && !failed ; i++) {
+        sp<IMemory>& region(info.regions[i].region);
+        if (region != 0) {
+            sp<IMemoryHeap> heap(region->getMemory());
+            if (heap != 0) {
+                const int fd = heap->heapID();
+                gpu->gpu[i].fd = fd;
+                gpu->gpu[i].base = region->pointer(); 
+                gpu->gpu[i].size = region->size(); 
+                gpu->gpu[i].user = region.get();
+                gpu->gpu[i].offset = info.regions[i].reserved;
+#if HAVE_ANDROID_OS
+                struct pmem_region reg;
+                if (ioctl(fd, PMEM_GET_PHYS, &reg) >= 0)
+                    gpu->gpu[i].phys = (void*)reg.offset;
+#endif
+                region->incStrong(gpu);
+            } else {
+                LOGE("GPU region handle [%d, %p] is invalid!", i, region.get());
+                failed = true;
+            }
+        }
+    }
+    
+    if (failed) {
+        // something went wrong, clean up everything!
+        if (gpu->regs.user) {
+            static_cast<IMemory*>(gpu->regs.user)->decStrong(gpu);
+            for (size_t i=0 ; i<info.count ; i++) {
+                if (gpu->gpu[i].user) {
+                    static_cast<IMemory*>(gpu->gpu[i].user)->decStrong(gpu);
+                }
+            }
+        }
+    }
+    
+    gpu->count = info.count;
+    return gpu;
+}
+
+static int gpu_release(void*, request_gpu_t* gpu)
+{
+    sp<IMemory> regs;
+
+    { // scope for lock
+        Mutex::Autolock _l(gRegionsLock);
+        regs = static_cast<IMemory*>(gpu->regs.user);   
+        gpu->regs.user = 0;
+        if (regs != 0) regs->decStrong(gpu);
+        
+        for (int i=0 ; i<gpu->count ; i++) {
+            sp<IMemory> r(static_cast<IMemory*>(gpu->gpu[i].user));
+            gpu->gpu[i].user = 0;
+            if (r != 0) r->decStrong(gpu);
+        }
+    }
+    
+    // there is a special transaction to relinquish the GPU
+    // (it will happen automatically anyway if we don't do this)
+    Parcel data, reply;
+    // NOTE: this transaction does not require an interface token
+    regs->asBinder()->transact(1000, data, &reply);
+    return 1;
+}
+
+/*****************************************************************************/
+
+static __attribute__((noinline))
+void *load_driver(const char* driver, gl_hooks_t* hooks)
+{
+    void* dso = dlopen(driver, RTLD_NOW | RTLD_LOCAL);
+    LOGE_IF(!dso,
+            "couldn't load <%s> library (%s)",
+            driver, dlerror());
+
+    if (dso) {
+        void** curr;
+        char const * const * api;
+        gl_hooks_t::gl_t* gl = &hooks->gl;
+        curr = (void**)gl;
+        api = gl_names;
+        while (*api) {
+            void* f = dlsym(dso, *api);
+            //LOGD("<%s> @ 0x%p", *api, f);
+            if (f == NULL) {
+                //LOGW("<%s> not found in %s", *api, driver);
+                f = (void*)gl_unimplemented;
+            }
+            *curr++ = f;
+            api++;
+        }
+        gl_hooks_t::egl_t* egl = &hooks->egl;
+        curr = (void**)egl;
+        api = egl_names;
+        while (*api) {
+            void* f = dlsym(dso, *api);
+            if (f == NULL) {
+                //LOGW("<%s> not found in %s", *api, driver);
+                f = (void*)0;
+            }
+            *curr++ = f;
+            api++;
+        }
+
+        // hook this driver up with surfaceflinger if needed
+        register_gpu_t register_gpu = 
+            (register_gpu_t)dlsym(dso, "oem_register_gpu");
+
+        if (register_gpu != NULL) {
+            if (getSurfaceFlinger() != 0) {
+                register_gpu(dso, gpu_acquire, gpu_release);
+            }
+        }
+    }
+    return dso;
+}
+
+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 (key > sortedArray[mid]) { 
+            first = mid + 1;
+        } else if (key < sortedArray[mid]) { 
+            last = mid - 1;
+        } else {
+            return mid;
+        }
+    }
+    return -1;
+}
+
+static int cmp_configs(const void* a, const void *b)
+{
+    EGLConfig c0 = *(EGLConfig const *)a;
+    EGLConfig c1 = *(EGLConfig const *)b;
+    return c0<c1 ? -1 : (c0>c1 ? 1 : 0);
+}
+
+static char const * const gVendorString     = "Android";
+static char const * const gVersionString    = "1.2 Android META-EGL";
+static char const * const gClientApiString  = "OpenGL ES";
+
+struct extention_map_t {
+    const char* name;
+    void (*address)(void);
+};
+
+static const extention_map_t gExtentionMap[] = {
+    { "eglSwapRectangleANDROID",         (void(*)())&eglSwapRectangleANDROID },
+    { "eglQueryStringConfigANDROID",     (void(*)())&eglQueryStringConfigANDROID },
+};
+
+static extention_map_t gGLExtentionMap[MAX_NUMBER_OF_GL_EXTENSIONS];
+
+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;
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+// ----------------------------------------------------------------------------
+
+using namespace android;
+
+
+// ----------------------------------------------------------------------------
+// extensions for the framework
+// ----------------------------------------------------------------------------
+
+void glColorPointerBounds(GLint size, GLenum type, GLsizei stride,
+        const GLvoid *ptr, GLsizei count) {
+    glColorPointer(size, type, stride, ptr);
+}
+void glNormalPointerBounds(GLenum type, GLsizei stride,
+        const GLvoid *pointer, GLsizei count) {
+    glNormalPointer(type, stride, pointer);
+}
+void glTexCoordPointerBounds(GLint size, GLenum type,
+        GLsizei stride, const GLvoid *pointer, GLsizei count) {
+    glTexCoordPointer(size, type, stride, pointer);
+}
+void glVertexPointerBounds(GLint size, GLenum type,
+        GLsizei stride, const GLvoid *pointer, GLsizei count) {
+    glVertexPointer(size, type, stride, pointer);
+}
+
+
+// ----------------------------------------------------------------------------
+// Actual GL wrappers
+// ----------------------------------------------------------------------------
+
+#if __OPTIMIZE__ && defined(__arm__) && !defined(__thumb__) && !USE_SLOW_BINDING && !GL_LOGGER
+
+    #define API_ENTRY(_api) __attribute__((naked)) _api
+    #define CALL_GL_API(_api, ...)                              \
+         asm volatile(                                          \
+            "mov   r12, #0xFFFF0FFF   \n"                       \
+            "ldr   r12, [r12, #-15]   \n"                       \
+            "ldr   r12, [r12, %[tls]] \n"                       \
+            "cmp   r12, #0            \n"                       \
+            "ldrne pc,  [r12, %[api]] \n"                       \
+            "bx    lr                 \n"                       \
+            :                                                   \
+            : [tls] "J"(TLS_SLOT_OPENGL_API*4),                 \
+              [api] "J"(__builtin_offsetof(gl_hooks_t, gl._api))    \
+            :                                                   \
+            );
+    
+    #define CALL_GL_API_RETURN(_api, ...) \
+        CALL_GL_API(_api, __VA_ARGS__) \
+        return 0; // placate gcc's warnings. never reached.
+
+#else
+
+    #define API_ENTRY(_api) _api
+    #if GL_LOGGER
+
+        #define CALL_GL_API(_api, ...)          \
+            gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
+            log_##_api(__VA_ARGS__); \
+            _c->_api(__VA_ARGS__);
+        
+        #define CALL_GL_API_RETURN(_api, ...)   \
+            gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
+            log_##_api(__VA_ARGS__); \
+            return _c->_api(__VA_ARGS__)
+
+    #else
+
+        #define CALL_GL_API(_api, ...)          \
+            gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
+            _c->_api(__VA_ARGS__);
+        
+        #define CALL_GL_API_RETURN(_api, ...)   \
+            gl_hooks_t::gl_t const * const _c = &getGlThreadSpecific()->gl; \
+            return _c->_api(__VA_ARGS__)
+
+    #endif
+
+#endif
+
+#include "gl_api.cpp"
+
+#undef API_ENTRY
+#undef CALL_GL_API
+#undef CALL_GL_API_RETURN
+
+// ----------------------------------------------------------------------------
+namespace android {
+// ----------------------------------------------------------------------------
+
+static int gl_context_lost() {
+    setGlThreadSpecific(&gHooks[IMPL_HARDWARE_CONTEXT_LOST]);
+    return 0;
+}
+static int egl_context_lost() {
+    setGlThreadSpecific(&gHooks[IMPL_HARDWARE_CONTEXT_LOST]);
+    return EGL_FALSE;
+}
+static EGLBoolean egl_context_lost_swap_buffers(void*, void*) {
+    usleep(100000); // don't use all the CPU
+    setGlThreadSpecific(&gHooks[IMPL_HARDWARE_CONTEXT_LOST]);
+    return EGL_FALSE;
+}
+static GLint egl_context_lost_get_error() {
+    return EGL_CONTEXT_LOST;
+}
+static int ext_context_lost() {
+    return 0;
+}
+
+static void gl_no_context() {
+    LOGE("call to OpenGL ES API with no current context");
+}
+static void early_egl_init(void) 
+{
+#if !defined(HAVE_ANDROID_OS) || USE_SLOW_BINDING || GL_LOGGER
+    pthread_key_create(&gGLWrapperKey, NULL);
+#endif
+    uint32_t addr = (uint32_t)((void*)gl_no_context);
+    android_memset32((uint32_t*)(void*)&gHooks[IMPL_NO_CONTEXT], addr, sizeof(gHooks[IMPL_NO_CONTEXT]));
+    setGlThreadSpecific(&gHooks[IMPL_NO_CONTEXT]);
+}
+
+static pthread_once_t once_control = PTHREAD_ONCE_INIT;
+static int sEarlyInitState = pthread_once(&once_control, &early_egl_init);
+
+
+static inline
+egl_display_t* get_display(EGLDisplay dpy)
+{
+    uintptr_t index = uintptr_t(dpy)-1U;
+    return (index >= NUM_DISPLAYS) ? NULL : &gDisplay[index];
+}
+
+static inline
+egl_surface_t* get_surface(EGLSurface surface)
+{
+    egl_surface_t* s = (egl_surface_t *)surface;
+    return s;
+}
+
+static inline
+egl_context_t* get_context(EGLContext context)
+{
+    egl_context_t* c = (egl_context_t *)context;
+    return c;
+}
+
+static egl_connection_t* validate_display_config(
+        EGLDisplay dpy, EGLConfig config,
+        egl_display_t const*& dp, int& impl, int& index)
+{
+    dp = get_display(dpy);
+    if (!dp) return setError(EGL_BAD_DISPLAY, (egl_connection_t*)NULL);
+
+    impl = uintptr_t(config)>>24;
+    if (uint32_t(impl) >= 2) {
+        return setError(EGL_BAD_CONFIG, (egl_connection_t*)NULL);
+    } 
+    index = uintptr_t(config) & 0xFFFFFF;
+    if (index >= dp->numConfigs[impl]) {
+        return setError(EGL_BAD_CONFIG, (egl_connection_t*)NULL);
+    }
+    egl_connection_t* const cnx = &gEGLImpl[impl];
+    if (cnx->dso == 0) {
+        return setError(EGL_BAD_CONFIG, (egl_connection_t*)NULL);
+    }
+    return cnx;
+}
+
+static EGLBoolean validate_display_context(EGLDisplay dpy, EGLContext ctx)
+{
+    if ((uintptr_t(dpy)-1U) >= NUM_DISPLAYS)
+        return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+    if (!get_display(dpy)->isValid())
+        return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+    if (!ctx) // TODO: make sure context is a valid object
+        return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+    if (!get_context(ctx)->isValid())
+        return setError(EGL_BAD_CONTEXT, EGL_FALSE);
+    return EGL_TRUE;
+}
+
+static EGLBoolean validate_display_surface(EGLDisplay dpy, EGLSurface surface)
+{
+    if ((uintptr_t(dpy)-1U) >= NUM_DISPLAYS)
+        return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+    if (!get_display(dpy)->isValid())
+        return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+    if (!surface) // TODO: make sure surface is a valid object
+        return setError(EGL_BAD_SURFACE, EGL_FALSE);
+    if (!get_surface(surface)->isValid())
+        return setError(EGL_BAD_SURFACE, EGL_FALSE);
+    return EGL_TRUE;
+}
+
+static void add_extension(egl_display_t* dp, char const*& p, const char* ext)
+{
+    if (!strstr(p, ext)) {
+        p = (char const*)realloc((void*)p, strlen(p) + 1 + strlen(ext) + 1);
+        strcat((char*)p, " ");
+        strcat((char*)p, ext);
+    }
+    if (!strstr(dp->extensionsString, ext)) {
+        char const*& es = dp->extensionsString;
+        es = (char const*)realloc((void*)es, strlen(es) + 1 + strlen(ext) + 1);
+        strcat((char*)es, " ");
+        strcat((char*)es, ext);
+    }    
+}
+
+// ----------------------------------------------------------------------------
+}; // namespace android
+// ----------------------------------------------------------------------------
+
+EGLDisplay eglGetDisplay(NativeDisplayType display)
+{
+    if (sEarlyInitState) {
+        return EGL_NO_DISPLAY;
+    }
+
+    uint32_t index = uint32_t(display);
+    if (index >= NUM_DISPLAYS) {
+        return EGL_NO_DISPLAY;
+    }
+    
+    EGLDisplay dpy = EGLDisplay(uintptr_t(display) + 1LU);
+    egl_display_t* d = &gDisplay[index];
+        
+    // dynamically load all our EGL implementations for that display
+    // and call into the real eglGetGisplay()
+    egl_connection_t* cnx = &gEGLImpl[IMPL_SOFTWARE];
+    if (cnx->dso == 0) {
+        cnx->hooks = &gHooks[IMPL_SOFTWARE];
+        cnx->dso = load_driver("libagl.so", cnx->hooks);
+    }
+    if (cnx->dso && d->dpys[IMPL_SOFTWARE]==EGL_NO_DISPLAY) {
+        d->dpys[IMPL_SOFTWARE] = cnx->hooks->egl.eglGetDisplay(display);
+        LOGE_IF(d->dpys[IMPL_SOFTWARE]==EGL_NO_DISPLAY,
+                "No EGLDisplay for software EGL!");
+    }
+
+    cnx = &gEGLImpl[IMPL_HARDWARE];
+    if (cnx->dso == 0 && cnx->unavailable == 0) {
+        char value[PROPERTY_VALUE_MAX];
+        property_get("debug.egl.hw", value, "1");
+        if (atoi(value) != 0) {
+            cnx->hooks = &gHooks[IMPL_HARDWARE];
+            cnx->dso = load_driver("libhgl.so", cnx->hooks);
+        } else {
+            LOGD("3D hardware acceleration is disabled");
+        }
+    }
+    if (cnx->dso && d->dpys[IMPL_HARDWARE]==EGL_NO_DISPLAY) {
+        android_memset32(
+                (uint32_t*)(void*)&gHooks[IMPL_HARDWARE_CONTEXT_LOST].gl,
+                (uint32_t)((void*)gl_context_lost),
+                sizeof(gHooks[IMPL_HARDWARE_CONTEXT_LOST].gl));
+        android_memset32(
+                (uint32_t*)(void*)&gHooks[IMPL_HARDWARE_CONTEXT_LOST].egl,
+                (uint32_t)((void*)egl_context_lost),
+                sizeof(gHooks[IMPL_HARDWARE_CONTEXT_LOST].egl));
+        android_memset32(
+                (uint32_t*)(void*)&gHooks[IMPL_HARDWARE_CONTEXT_LOST].ext,
+                (uint32_t)((void*)ext_context_lost),
+                sizeof(gHooks[IMPL_HARDWARE_CONTEXT_LOST].ext));
+
+        gHooks[IMPL_HARDWARE_CONTEXT_LOST].egl.eglSwapBuffers =
+                egl_context_lost_swap_buffers;
+        
+        gHooks[IMPL_HARDWARE_CONTEXT_LOST].egl.eglGetError =
+                egl_context_lost_get_error;
+
+        gHooks[IMPL_HARDWARE_CONTEXT_LOST].egl.eglTerminate =
+                gHooks[IMPL_HARDWARE].egl.eglTerminate;
+        
+        d->dpys[IMPL_HARDWARE] = cnx->hooks->egl.eglGetDisplay(display);
+        if (d->dpys[IMPL_HARDWARE] == EGL_NO_DISPLAY) {
+            dlclose((void*)cnx->dso);
+            cnx->dso = 0;
+            // in case of failure, we want to make sure we don't try again
+            // as it's expensive.
+            cnx->unavailable = 1;
+        }
+    }
+
+    return dpy;
+}
+
+// ----------------------------------------------------------------------------
+// Initialization
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglInitialize(EGLDisplay dpy, EGLint *major, EGLint *minor)
+{
+    egl_display_t * const dp = get_display(dpy);
+    if (!dp) return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+    if (android_atomic_inc(&dp->refs) > 0) {
+        if (major != NULL) *major = 1;
+        if (minor != NULL) *minor = 2;
+        return EGL_TRUE;
+    }
+    
+    setGlThreadSpecific(&gHooks[IMPL_NO_CONTEXT]);
+    
+    // initialize each EGL and
+    // build our own extension string first, based on the extension we know
+    // and the extension supported by our client implementation
+    dp->extensionsString = strdup("EGL_ANDROID_query_string_config");
+    for (int i=0 ; i<2 ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        cnx->major = -1;
+        cnx->minor = -1;
+        if (cnx->dso && cnx->hooks->egl.eglInitialize(
+                dp->dpys[i], &cnx->major, &cnx->minor)) {
+
+            //LOGD("initialized %d dpy=%p, ver=%d.%d, cnx=%p",
+            //        i, dp->dpys[i], cnx->major, cnx->minor, cnx);
+
+            // get the query-strings for this display for each implementation
+            dp->queryString[i].vendor =
+                cnx->hooks->egl.eglQueryString(dp->dpys[i], EGL_VENDOR);
+            dp->queryString[i].version =
+                cnx->hooks->egl.eglQueryString(dp->dpys[i], EGL_VERSION);
+            dp->queryString[i].extensions = strdup(
+                cnx->hooks->egl.eglQueryString(dp->dpys[i], EGL_EXTENSIONS));
+            dp->queryString[i].clientApi =
+                cnx->hooks->egl.eglQueryString(dp->dpys[i], EGL_CLIENT_APIS);
+            
+            // Dynamically insert extensions we know about
+            if (cnx->hooks->egl.eglSwapRectangleANDROID)
+                add_extension(dp, dp->queryString[i].extensions,
+                        "EGL_ANDROID_swap_rectangle");
+
+            if (cnx->hooks->egl.eglQueryStringConfigANDROID)
+                add_extension(dp, dp->queryString[i].extensions,
+                        "EGL_ANDROID_query_string_config");
+        }
+    }
+            
+    // Build the extension list that depends on the current config.
+    // It is the intersection of our extension list and the
+    // underlaying EGL's extensions list
+    EGLBoolean res = EGL_FALSE;
+    for (int i=0 ; i<2 ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso && cnx->major>=0 && cnx->minor>=0) {
+            char const* const their_extensions = dp->queryString[i].extensions;            
+            char* our_extensions = strdup(dp->extensionsString);
+            char* const our_extensions_org = our_extensions;
+            char* extensions_config = (char*)calloc(strlen(our_extensions)+2, 1);
+            char* p;
+            do {
+                p = strchr(our_extensions, ' ');
+                if (p)  *p++ = 0;
+                else    p = strchr(our_extensions, 0);
+                if (strstr(their_extensions, our_extensions)) {
+                    strcat(extensions_config, our_extensions);
+                    strcat(extensions_config, " ");
+                }
+                our_extensions = p;
+            } while (*p);
+            free((void*)our_extensions_org);
+
+            // remove the trailling white space
+            if (extensions_config[0] != 0) {
+                size_t l = strlen(extensions_config) - 1; // new size
+                extensions_config[l] = 0; // remove the trailling white space
+                extensions_config = (char*)realloc(extensions_config, l+1);
+            } else {
+                extensions_config = (char*)realloc(extensions_config, 1);
+            }
+            dp->queryString[i].extensions_config = extensions_config;
+
+            EGLint n;
+            if (cnx->hooks->egl.eglGetConfigs(dp->dpys[i], 0, 0, &n)) {
+                dp->configs[i] = (EGLConfig*)malloc(sizeof(EGLConfig)*n);
+                if (dp->configs[i]) {
+                    if (cnx->hooks->egl.eglGetConfigs(
+                            dp->dpys[i], dp->configs[i], n, &dp->numConfigs[i]))
+                    {
+                        // sort the configurations so we can do binary searches
+                        qsort(  dp->configs[i],
+                                dp->numConfigs[i],
+                                sizeof(EGLConfig), cmp_configs);
+
+                        dp->numTotalConfigs += n;
+                        res = EGL_TRUE;
+                    }
+                }
+            }
+        }
+    }
+
+    if (res == EGL_TRUE) {
+        if (major != NULL) *major = 1;
+        if (minor != NULL) *minor = 2;
+        return EGL_TRUE;
+    }
+    return setError(EGL_NOT_INITIALIZED, EGL_FALSE);
+}
+
+EGLBoolean eglTerminate(EGLDisplay dpy)
+{
+    egl_display_t* const dp = get_display(dpy);
+    if (!dp) return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+    if (android_atomic_dec(&dp->refs) != 1)
+        return EGL_TRUE;
+        
+    EGLBoolean res = EGL_FALSE;
+    for (int i=0 ; i<2 ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            cnx->hooks->egl.eglTerminate(dp->dpys[i]);
+            
+            /* REVISIT: it's unclear what to do if eglTerminate() fails,
+             * on one end we shouldn't care, on the other end if it fails
+             * it might not be safe to call dlclose() (there could be some
+             * threads around). */
+            
+            free(dp->configs[i]);
+            free((void*)dp->queryString[i].extensions_config);
+            free((void*)dp->queryString[i].extensions);
+            dp->numConfigs[i] = 0;
+            dp->dpys[i] = EGL_NO_DISPLAY;
+            dlclose((void*)cnx->dso);
+            cnx->dso = 0;
+            res = EGL_TRUE;
+        }
+    }
+    free((void*)dp->extensionsString);
+    dp->extensionsString = 0;
+    dp->numTotalConfigs = 0;
+    clearTLS();
+    return res;
+}
+
+// ----------------------------------------------------------------------------
+// configuration
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglGetConfigs(   EGLDisplay dpy,
+                            EGLConfig *configs,
+                            EGLint config_size, EGLint *num_config)
+{
+    egl_display_t const * const dp = get_display(dpy);
+    if (!dp) return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+    GLint numConfigs = dp->numTotalConfigs;
+    if (!configs) {
+        *num_config = numConfigs;
+        return EGL_TRUE;
+    }
+    GLint n = 0;
+    for (int j=0 ; j<2 ; j++) {
+        for (int i=0 ; i<dp->numConfigs[j] && config_size ; i++) {
+            *configs++ = MAKE_CONFIG(j, 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)
+{
+    egl_display_t const * const dp = get_display(dpy);
+    if (!dp) return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+    if (configs == 0) {
+        *num_config = 0;
+        return EGL_TRUE;
+    }
+
+    EGLBoolean res = EGL_FALSE;
+    *num_config = 0;
+    for (int i=0 ; i<2 ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            EGLint n;
+            if (cnx->hooks->egl.eglChooseConfig(
+                    dp->dpys[i], attrib_list, configs, config_size, &n))
+            {
+                // now we need to convert these client EGLConfig to our
+                // internal EGLConfig format. This is done in O(n log n).
+                for (int j=0 ; j<n ; j++) {
+                    int index = binarySearch<EGLConfig>(
+                            dp->configs[i], 0, dp->numConfigs[i]-1, configs[j]);
+                    if (index >= 0) {
+                        configs[j] = MAKE_CONFIG(i, 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)
+{
+    egl_display_t const* dp = 0;
+    int i=0, index=0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp, i, index);
+    if (!cnx) return EGL_FALSE;
+    return cnx->hooks->egl.eglGetConfigAttrib(
+            dp->dpys[i], dp->configs[i][index], attribute, value);
+}
+
+// ----------------------------------------------------------------------------
+// surfaces
+// ----------------------------------------------------------------------------
+
+EGLSurface eglCreateWindowSurface(  EGLDisplay dpy, EGLConfig config,
+                                    NativeWindowType window,
+                                    const EGLint *attrib_list)
+{
+    egl_display_t const* dp = 0;
+    int i=0, index=0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp, i, index);
+    if (cnx) {
+        // window must be connected upon calling underlying
+        // eglCreateWindowSurface
+        if (window) {
+            window->incRef(window);
+            if (window->connect)
+                window->connect(window);
+        }
+
+        EGLSurface surface = cnx->hooks->egl.eglCreateWindowSurface(
+                dp->dpys[i], dp->configs[i][index], window, attrib_list);       
+        if (surface != EGL_NO_SURFACE) {
+            egl_surface_t* s = new egl_surface_t(dpy, surface, window, i, cnx);
+            return s;
+        }
+        
+        // something went wrong, disconnect and free window
+        // (will disconnect() automatically)
+        if (window) {
+            window->decRef(window);
+        }        
+    }
+    return EGL_NO_SURFACE;
+}
+
+EGLSurface eglCreatePixmapSurface(  EGLDisplay dpy, EGLConfig config,
+                                    NativePixmapType pixmap,
+                                    const EGLint *attrib_list)
+{
+    egl_display_t const* dp = 0;
+    int i=0, index=0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp, i, index);
+    if (cnx) {
+        EGLSurface surface = cnx->hooks->egl.eglCreatePixmapSurface(
+                dp->dpys[i], dp->configs[i][index], pixmap, attrib_list);
+        if (surface != EGL_NO_SURFACE) {
+            egl_surface_t* s = new egl_surface_t(dpy, surface, NULL, i, cnx);
+            return s;
+        }
+    }
+    return EGL_NO_SURFACE;
+}
+
+EGLSurface eglCreatePbufferSurface( EGLDisplay dpy, EGLConfig config,
+                                    const EGLint *attrib_list)
+{
+    egl_display_t const* dp = 0;
+    int i=0, index=0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp, i, index);
+    if (cnx) {
+        EGLSurface surface = cnx->hooks->egl.eglCreatePbufferSurface(
+                dp->dpys[i], dp->configs[i][index], attrib_list);
+        if (surface != EGL_NO_SURFACE) {
+            egl_surface_t* s = new egl_surface_t(dpy, surface, NULL, i, cnx);
+            return s;
+        }
+    }
+    return EGL_NO_SURFACE;
+}
+                                    
+EGLBoolean eglDestroySurface(EGLDisplay dpy, EGLSurface surface)
+{
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_display_t const * const dp = get_display(dpy);
+    egl_surface_t const * const s = get_surface(surface);
+
+    EGLBoolean result = s->cnx->hooks->egl.eglDestroySurface(
+            dp->dpys[s->impl], s->surface);
+    
+    delete s;
+    return result;
+}
+
+EGLBoolean eglQuerySurface( EGLDisplay dpy, EGLSurface surface,
+                            EGLint attribute, EGLint *value)
+{
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_display_t const * const dp = get_display(dpy);
+    egl_surface_t const * const s = get_surface(surface);
+
+    return s->cnx->hooks->egl.eglQuerySurface(
+            dp->dpys[s->impl], s->surface, attribute, value);
+}
+
+// ----------------------------------------------------------------------------
+// contextes
+// ----------------------------------------------------------------------------
+
+EGLContext eglCreateContext(EGLDisplay dpy, EGLConfig config,
+                            EGLContext share_list, const EGLint *attrib_list)
+{
+    egl_display_t const* dp = 0;
+    int i=0, index=0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp, i, index);
+    if (cnx) {
+        EGLContext context = cnx->hooks->egl.eglCreateContext(
+                dp->dpys[i], dp->configs[i][index], share_list, attrib_list);
+        if (context != EGL_NO_CONTEXT) {
+            egl_context_t* c = new egl_context_t(dpy, context, i, cnx);
+            return c;
+        }
+    }
+    return EGL_NO_CONTEXT;
+}
+
+EGLBoolean eglDestroyContext(EGLDisplay dpy, EGLContext ctx)
+{
+    if (!validate_display_context(dpy, ctx))
+        return EGL_FALSE;
+    egl_display_t const * const dp = get_display(dpy);
+    egl_context_t * const c = get_context(ctx);
+    EGLBoolean result = c->cnx->hooks->egl.eglDestroyContext(
+            dp->dpys[c->impl], c->context);
+    delete c;
+    return result;
+}
+
+EGLBoolean eglMakeCurrent(  EGLDisplay dpy, EGLSurface draw,
+                            EGLSurface read, EGLContext ctx)
+{
+    egl_display_t const * const dp = get_display(dpy);
+    if (!dp) return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+    if (read == EGL_NO_SURFACE && draw  == EGL_NO_SURFACE &&
+            ctx == EGL_NO_CONTEXT) 
+    {
+        EGLBoolean result = EGL_TRUE;
+        ctx = getContext();
+        if (ctx) {
+            egl_context_t * const c = get_context(ctx);
+            result = c->cnx->hooks->egl.eglMakeCurrent(dp->dpys[c->impl], 0, 0, 0);
+            if (result == EGL_TRUE) {
+                setGlThreadSpecific(&gHooks[IMPL_NO_CONTEXT]);
+                setContext(EGL_NO_CONTEXT);
+            }
+        }
+        return result;
+    }
+
+    if (!validate_display_context(dpy, ctx))
+        return EGL_FALSE;    
+    
+    egl_context_t * const c = get_context(ctx);
+    if (draw != EGL_NO_SURFACE) {
+        egl_surface_t const * d = get_surface(draw);
+        if (!d) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+        if (d->impl != c->impl)
+            return setError(EGL_BAD_MATCH, EGL_FALSE);
+        draw = d->surface;
+    }
+    if (read != EGL_NO_SURFACE) {
+        egl_surface_t const * r = get_surface(read);
+        if (!r) return setError(EGL_BAD_SURFACE, EGL_FALSE);
+        if (r->impl != c->impl)
+            return setError(EGL_BAD_MATCH, EGL_FALSE);
+        read = r->surface;
+    }
+    EGLBoolean result = c->cnx->hooks->egl.eglMakeCurrent(
+            dp->dpys[c->impl], draw, read, c->context);
+
+    if (result == EGL_TRUE) {
+        setGlThreadSpecific(c->cnx->hooks);
+        setContext(ctx);
+        c->read = read;
+        c->draw = draw;
+    }
+    return result;
+}
+
+
+EGLBoolean eglQueryContext( EGLDisplay dpy, EGLContext ctx,
+                            EGLint attribute, EGLint *value)
+{
+    if (!validate_display_context(dpy, ctx))
+        return EGL_FALSE;    
+    
+    egl_display_t const * const dp = get_display(dpy);
+    egl_context_t * const c = get_context(ctx);
+
+    return c->cnx->hooks->egl.eglQueryContext(
+            dp->dpys[c->impl], c->context, attribute, value);
+}
+
+EGLContext eglGetCurrentContext(void)
+{
+    EGLContext ctx = getContext();
+    return ctx;
+}
+
+EGLSurface eglGetCurrentSurface(EGLint readdraw)
+{
+    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)
+{
+    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)
+{
+    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->hooks->egl.eglWaitGL();
+    }
+    return res;
+}
+
+EGLBoolean eglWaitNative(EGLint engine)
+{
+    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->hooks->egl.eglWaitNative(engine);
+    }
+    return res;
+}
+
+EGLint eglGetError(void)
+{
+    EGLint result = EGL_SUCCESS;
+    for (int i=0 ; i<2 ; i++) {
+        EGLint err = EGL_SUCCESS;
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso)
+            err = cnx->hooks->egl.eglGetError();
+        if (err!=EGL_SUCCESS && result==EGL_SUCCESS)
+            result = err;
+    }
+    if (result == EGL_SUCCESS)
+        result = getError();
+    return result;
+}
+
+void (*eglGetProcAddress(const char *procname))()
+{
+    void (*addr)();
+    addr = findProcAddress(procname, gExtentionMap, NELEM(gExtentionMap));
+    if (addr) return addr;
+
+    return NULL; // TODO: finish implementation below
+
+    addr = findProcAddress(procname, gGLExtentionMap, NELEM(gGLExtentionMap));
+    if (addr) return addr;
+    
+    addr = 0;
+    int slot = -1;
+    for (int i=0 ; i<2 ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            if (cnx->hooks->egl.eglGetProcAddress) {
+                addr = cnx->hooks->egl.eglGetProcAddress(procname);
+                if (addr) {
+                    if (slot == -1) {
+                        slot = 0; // XXX: find free slot
+                        if (slot == -1) {
+                            addr = 0;
+                            break;
+                        }
+                    }
+                    cnx->hooks->ext.extensions[slot] = addr;
+                }
+            }
+        }
+    }
+    
+    if (slot >= 0) {
+        addr = 0; // XXX: address of stub 'slot'
+        gGLExtentionMap[slot].name = strdup(procname);
+        gGLExtentionMap[slot].address = addr;
+    }
+    
+    return addr;
+
+    
+    /*
+     *  TODO: For OpenGL ES extensions, we must generate a stub
+     *  that looks like
+     *      mov     r12, #0xFFFF0FFF
+     *      ldr     r12, [r12, #-15]
+     *      ldr     r12, [r12, #TLS_SLOT_OPENGL_API*4]
+     *      mov     r12, [r12, #api_offset]
+     *      ldrne   pc, r12
+     *      mov     pc, #unsupported_extension
+     * 
+     *  and write the address of the extension in *all*
+     *  gl_hooks_t::gl_ext_t at offset "api_offset" from gl_hooks_t
+     * 
+     */
+}
+
+EGLBoolean eglSwapBuffers(EGLDisplay dpy, EGLSurface draw)
+{
+    if (!validate_display_surface(dpy, draw))
+        return EGL_FALSE;    
+    egl_display_t const * const dp = get_display(dpy);
+    egl_surface_t const * const s = get_surface(draw);
+    return s->cnx->hooks->egl.eglSwapBuffers(dp->dpys[s->impl], s->surface);
+}
+
+EGLBoolean eglCopyBuffers(  EGLDisplay dpy, EGLSurface surface,
+                            NativePixmapType target)
+{
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_display_t const * const dp = get_display(dpy);
+    egl_surface_t const * const s = get_surface(surface);
+    return s->cnx->hooks->egl.eglCopyBuffers(
+            dp->dpys[s->impl], s->surface, target);
+}
+
+const char* eglQueryString(EGLDisplay dpy, EGLint name)
+{
+    egl_display_t const * const dp = get_display(dpy);
+    switch (name) {
+        case EGL_VENDOR:
+            return gVendorString;
+        case EGL_VERSION:
+            return gVersionString;
+        case EGL_EXTENSIONS:
+            return dp->extensionsString;
+        case EGL_CLIENT_APIS:
+            return gClientApiString;
+    }
+    return setError(EGL_BAD_PARAMETER, (const char *)0);
+}
+
+
+// ----------------------------------------------------------------------------
+// EGL 1.1
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglSurfaceAttrib(
+        EGLDisplay dpy, EGLSurface surface, EGLint attribute, EGLint value)
+{
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_display_t const * const dp = get_display(dpy);
+    egl_surface_t const * const s = get_surface(surface);
+    if (s->cnx->hooks->egl.eglSurfaceAttrib) {
+        return s->cnx->hooks->egl.eglSurfaceAttrib(
+                dp->dpys[s->impl], s->surface, attribute, value);
+    }
+    return setError(EGL_BAD_SURFACE, EGL_FALSE);
+}
+
+EGLBoolean eglBindTexImage(
+        EGLDisplay dpy, EGLSurface surface, EGLint buffer)
+{
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_display_t const * const dp = get_display(dpy);
+    egl_surface_t const * const s = get_surface(surface);
+    if (s->cnx->hooks->egl.eglBindTexImage) {
+        return s->cnx->hooks->egl.eglBindTexImage(
+                dp->dpys[s->impl], s->surface, buffer);
+    }
+    return setError(EGL_BAD_SURFACE, EGL_FALSE);
+}
+
+EGLBoolean eglReleaseTexImage(
+        EGLDisplay dpy, EGLSurface surface, EGLint buffer)
+{
+    if (!validate_display_surface(dpy, surface))
+        return EGL_FALSE;    
+    egl_display_t const * const dp = get_display(dpy);
+    egl_surface_t const * const s = get_surface(surface);
+    if (s->cnx->hooks->egl.eglReleaseTexImage) {
+        return s->cnx->hooks->egl.eglReleaseTexImage(
+                dp->dpys[s->impl], s->surface, buffer);
+    }
+    return setError(EGL_BAD_SURFACE, EGL_FALSE);
+}
+
+EGLBoolean eglSwapInterval(EGLDisplay dpy, EGLint interval)
+{
+    egl_display_t * const dp = get_display(dpy);
+    if (!dp) return setError(EGL_BAD_DISPLAY, EGL_FALSE);
+
+    EGLBoolean res = EGL_TRUE;
+    for (int i=0 ; i<2 ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            if (cnx->hooks->egl.eglSwapInterval) {
+                if (cnx->hooks->egl.eglSwapInterval(dp->dpys[i], interval) == EGL_FALSE) {
+                    res = EGL_FALSE;
+                }
+            }
+        }
+    }
+    return res;
+}
+
+
+// ----------------------------------------------------------------------------
+// EGL 1.2
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglWaitClient(void)
+{
+    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->hooks->egl.eglWaitClient) {
+            res = cnx->hooks->egl.eglWaitClient();
+        } else {
+            res = cnx->hooks->egl.eglWaitGL();
+        }
+    }
+    return res;
+}
+
+EGLBoolean eglBindAPI(EGLenum api)
+{
+    // bind this API on all EGLs
+    EGLBoolean res = EGL_TRUE;
+    for (int i=0 ; i<2 ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            if (cnx->hooks->egl.eglBindAPI) {
+                if (cnx->hooks->egl.eglBindAPI(api) == EGL_FALSE) {
+                    res = EGL_FALSE;
+                }
+            }
+        }
+    }
+    return res;
+}
+
+EGLenum eglQueryAPI(void)
+{
+    for (int i=0 ; i<2 ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            if (cnx->hooks->egl.eglQueryAPI) {
+                // the first one we find is okay, because they all
+                // should be the same
+                return cnx->hooks->egl.eglQueryAPI();
+            }
+        }
+    }
+    // or, it can only be OpenGL ES
+    return EGL_OPENGL_ES_API;
+}
+
+EGLBoolean eglReleaseThread(void)
+{
+    for (int i=0 ; i<2 ; i++) {
+        egl_connection_t* const cnx = &gEGLImpl[i];
+        if (cnx->dso) {
+            if (cnx->hooks->egl.eglReleaseThread) {
+                cnx->hooks->egl.eglReleaseThread();
+            }
+        }
+    }
+    clearTLS();    
+    return EGL_TRUE;
+}
+
+EGLSurface eglCreatePbufferFromClientBuffer(
+          EGLDisplay dpy, EGLenum buftype, EGLClientBuffer buffer,
+          EGLConfig config, const EGLint *attrib_list)
+{
+    egl_display_t const* dp = 0;
+    int i=0, index=0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp, i, index);
+    if (!cnx) return EGL_FALSE;
+    if (cnx->hooks->egl.eglCreatePbufferFromClientBuffer) {
+        return cnx->hooks->egl.eglCreatePbufferFromClientBuffer(
+                dp->dpys[i], buftype, buffer, dp->configs[i][index], attrib_list);
+    }
+    return setError(EGL_BAD_CONFIG, EGL_NO_SURFACE);
+}
+
+// ----------------------------------------------------------------------------
+// Android extentions
+// ----------------------------------------------------------------------------
+
+EGLBoolean eglSwapRectangleANDROID(
+        EGLDisplay dpy, EGLSurface draw,
+        EGLint l, EGLint t, EGLint w, EGLint h)
+{    
+    if (!validate_display_surface(dpy, draw))
+        return EGL_FALSE;    
+    egl_display_t const * const dp = get_display(dpy);
+    egl_surface_t const * const s = get_surface(draw);
+    if (s->cnx->hooks->egl.eglSwapRectangleANDROID) {
+        return s->cnx->hooks->egl.eglSwapRectangleANDROID(
+                dp->dpys[s->impl], s->surface, l, t, w, h);
+    }
+    return setError(EGL_BAD_SURFACE, EGL_FALSE);
+}
+
+const char* eglQueryStringConfigANDROID(
+        EGLDisplay dpy, EGLConfig config, EGLint name)
+{
+    egl_display_t const* dp = 0;
+    int i=0, index=0;
+    egl_connection_t* cnx = validate_display_config(dpy, config, dp, i, index);
+    if (cnx) {
+        return dp->queryString[i].extensions_config;
+    }
+    return setError(EGL_BAD_PARAMETER, (const char *)0);
+}