diff --git a/libs/gui/GLConsumer.cpp b/libs/gui/GLConsumer.cpp
new file mode 100644
index 0000000..ba23f9e
--- /dev/null
+++ b/libs/gui/GLConsumer.cpp
@@ -0,0 +1,961 @@
+/*
+ * Copyright (C) 2010 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 "GLConsumer"
+#define ATRACE_TAG ATRACE_TAG_GRAPHICS
+//#define LOG_NDEBUG 0
+
+#define GL_GLEXT_PROTOTYPES
+#define EGL_EGLEXT_PROTOTYPES
+
+#include <EGL/egl.h>
+#include <EGL/eglext.h>
+#include <GLES2/gl2.h>
+#include <GLES2/gl2ext.h>
+
+#include <hardware/hardware.h>
+
+#include <gui/IGraphicBufferAlloc.h>
+#include <gui/ISurfaceComposer.h>
+#include <gui/SurfaceComposerClient.h>
+#include <gui/GLConsumer.h>
+
+#include <private/gui/ComposerService.h>
+
+#include <utils/Log.h>
+#include <utils/String8.h>
+#include <utils/Trace.h>
+
+namespace android {
+
+// This compile option makes GLConsumer use the
+// EGL_ANDROID_native_fence_sync extension to create Android native fences to
+// signal when all GLES reads for a given buffer have completed.  It is not
+// compatible with using the EGL_KHR_fence_sync extension for the same
+// purpose.
+#ifdef USE_NATIVE_FENCE_SYNC
+#ifdef USE_FENCE_SYNC
+#error "USE_NATIVE_FENCE_SYNC and USE_FENCE_SYNC are incompatible"
+#endif
+const bool GLConsumer::sUseNativeFenceSync = true;
+#else
+const bool GLConsumer::sUseNativeFenceSync = false;
+#endif
+
+// This compile option makes GLConsumer use the EGL_ANDROID_sync_wait
+// extension to insert server-side waits into the GLES command stream.  This
+// feature requires the EGL_ANDROID_native_fence_sync and
+// EGL_ANDROID_wait_sync extensions.
+#ifdef USE_WAIT_SYNC
+static const bool useWaitSync = true;
+#else
+static const bool useWaitSync = false;
+#endif
+
+// Macros for including the GLConsumer name in log messages
+#define ST_LOGV(x, ...) ALOGV("[%s] "x, mName.string(), ##__VA_ARGS__)
+#define ST_LOGD(x, ...) ALOGD("[%s] "x, mName.string(), ##__VA_ARGS__)
+#define ST_LOGI(x, ...) ALOGI("[%s] "x, mName.string(), ##__VA_ARGS__)
+#define ST_LOGW(x, ...) ALOGW("[%s] "x, mName.string(), ##__VA_ARGS__)
+#define ST_LOGE(x, ...) ALOGE("[%s] "x, mName.string(), ##__VA_ARGS__)
+
+// Transform matrices
+static float mtxIdentity[16] = {
+    1, 0, 0, 0,
+    0, 1, 0, 0,
+    0, 0, 1, 0,
+    0, 0, 0, 1,
+};
+static float mtxFlipH[16] = {
+    -1, 0, 0, 0,
+    0, 1, 0, 0,
+    0, 0, 1, 0,
+    1, 0, 0, 1,
+};
+static float mtxFlipV[16] = {
+    1, 0, 0, 0,
+    0, -1, 0, 0,
+    0, 0, 1, 0,
+    0, 1, 0, 1,
+};
+static float mtxRot90[16] = {
+    0, 1, 0, 0,
+    -1, 0, 0, 0,
+    0, 0, 1, 0,
+    1, 0, 0, 1,
+};
+static float mtxRot180[16] = {
+    -1, 0, 0, 0,
+    0, -1, 0, 0,
+    0, 0, 1, 0,
+    1, 1, 0, 1,
+};
+static float mtxRot270[16] = {
+    0, -1, 0, 0,
+    1, 0, 0, 0,
+    0, 0, 1, 0,
+    0, 1, 0, 1,
+};
+
+static void mtxMul(float out[16], const float a[16], const float b[16]);
+
+
+GLConsumer::GLConsumer(GLuint tex, bool allowSynchronousMode,
+        GLenum texTarget, bool useFenceSync, const sp<BufferQueue> &bufferQueue) :
+    ConsumerBase(bufferQueue == 0 ? new BufferQueue(allowSynchronousMode) : bufferQueue),
+    mCurrentTransform(0),
+    mCurrentTimestamp(0),
+    mFilteringEnabled(true),
+    mTexName(tex),
+#ifdef USE_FENCE_SYNC
+    mUseFenceSync(useFenceSync),
+#else
+    mUseFenceSync(false),
+#endif
+    mTexTarget(texTarget),
+    mEglDisplay(EGL_NO_DISPLAY),
+    mEglContext(EGL_NO_CONTEXT),
+    mCurrentTexture(BufferQueue::INVALID_BUFFER_SLOT),
+    mAttached(true)
+{
+    ST_LOGV("GLConsumer");
+
+    memcpy(mCurrentTransformMatrix, mtxIdentity,
+            sizeof(mCurrentTransformMatrix));
+
+    mBufferQueue->setConsumerUsageBits(DEFAULT_USAGE_FLAGS);
+}
+
+status_t GLConsumer::setDefaultMaxBufferCount(int bufferCount) {
+    Mutex::Autolock lock(mMutex);
+    return mBufferQueue->setDefaultMaxBufferCount(bufferCount);
+}
+
+
+status_t GLConsumer::setDefaultBufferSize(uint32_t w, uint32_t h)
+{
+    Mutex::Autolock lock(mMutex);
+    mDefaultWidth = w;
+    mDefaultHeight = h;
+    return mBufferQueue->setDefaultBufferSize(w, h);
+}
+
+status_t GLConsumer::updateTexImage() {
+    ATRACE_CALL();
+    ST_LOGV("updateTexImage");
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        ST_LOGE("updateTexImage: GLConsumer is abandoned!");
+        return NO_INIT;
+    }
+
+    // Make sure the EGL state is the same as in previous calls.
+    status_t err = checkAndUpdateEglStateLocked();
+    if (err != NO_ERROR) {
+        return err;
+    }
+
+    BufferQueue::BufferItem item;
+
+    // Acquire the next buffer.
+    // In asynchronous mode the list is guaranteed to be one buffer
+    // deep, while in synchronous mode we use the oldest buffer.
+    err = acquireBufferLocked(&item);
+    if (err != NO_ERROR) {
+        if (err == BufferQueue::NO_BUFFER_AVAILABLE) {
+            // We always bind the texture even if we don't update its contents.
+            ST_LOGV("updateTexImage: no buffers were available");
+            glBindTexture(mTexTarget, mTexName);
+            err = NO_ERROR;
+        } else {
+            ST_LOGE("updateTexImage: acquire failed: %s (%d)",
+                strerror(-err), err);
+        }
+        return err;
+    }
+
+    // Release the previous buffer.
+    err = releaseAndUpdateLocked(item);
+    if (err != NO_ERROR) {
+        // We always bind the texture.
+        glBindTexture(mTexTarget, mTexName);
+        return err;
+    }
+
+    // Bind the new buffer to the GL texture, and wait until it's ready.
+    return bindTextureImageLocked();
+}
+
+status_t GLConsumer::acquireBufferLocked(BufferQueue::BufferItem *item) {
+    status_t err = ConsumerBase::acquireBufferLocked(item);
+    if (err != NO_ERROR) {
+        return err;
+    }
+
+    int slot = item->mBuf;
+    if (item->mGraphicBuffer != NULL) {
+        // This buffer has not been acquired before, so we must assume
+        // that any EGLImage in mEglSlots is stale.
+        if (mEglSlots[slot].mEglImage != EGL_NO_IMAGE_KHR) {
+            if (!eglDestroyImageKHR(mEglDisplay, mEglSlots[slot].mEglImage)) {
+                ST_LOGW("acquireBufferLocked: eglDestroyImageKHR failed for slot=%d",
+                      slot);
+                // keep going
+            }
+            mEglSlots[slot].mEglImage = EGL_NO_IMAGE_KHR;
+        }
+    }
+
+    return NO_ERROR;
+}
+
+status_t GLConsumer::releaseBufferLocked(int buf, EGLDisplay display,
+       EGLSyncKHR eglFence) {
+    status_t err = ConsumerBase::releaseBufferLocked(buf, display, eglFence);
+
+    mEglSlots[buf].mEglFence = EGL_NO_SYNC_KHR;
+
+    return err;
+}
+
+status_t GLConsumer::releaseAndUpdateLocked(const BufferQueue::BufferItem& item)
+{
+    status_t err = NO_ERROR;
+
+    if (!mAttached) {
+        ST_LOGE("releaseAndUpdate: GLConsumer is not attached to an OpenGL "
+                "ES context");
+        return INVALID_OPERATION;
+    }
+
+    // Confirm state.
+    err = checkAndUpdateEglStateLocked();
+    if (err != NO_ERROR) {
+        return err;
+    }
+
+    int buf = item.mBuf;
+
+    // If the mEglSlot entry is empty, create an EGLImage for the gralloc
+    // buffer currently in the slot in ConsumerBase.
+    //
+    // We may have to do this even when item.mGraphicBuffer == NULL (which
+    // means the buffer was previously acquired), if we destroyed the
+    // EGLImage when detaching from a context but the buffer has not been
+    // re-allocated.
+    if (mEglSlots[buf].mEglImage == EGL_NO_IMAGE_KHR) {
+        EGLImageKHR image = createImage(mEglDisplay, mSlots[buf].mGraphicBuffer);
+        if (image == EGL_NO_IMAGE_KHR) {
+            ST_LOGW("releaseAndUpdate: unable to createImage on display=%p slot=%d",
+                  mEglDisplay, buf);
+            return UNKNOWN_ERROR;
+        }
+        mEglSlots[buf].mEglImage = image;
+    }
+
+    // Do whatever sync ops we need to do before releasing the old slot.
+    err = syncForReleaseLocked(mEglDisplay);
+    if (err != NO_ERROR) {
+        // Release the buffer we just acquired.  It's not safe to
+        // release the old buffer, so instead we just drop the new frame.
+        releaseBufferLocked(buf, mEglDisplay, EGL_NO_SYNC_KHR);
+        return err;
+    }
+
+    ST_LOGV("releaseAndUpdate: (slot=%d buf=%p) -> (slot=%d buf=%p)",
+            mCurrentTexture,
+            mCurrentTextureBuf != NULL ? mCurrentTextureBuf->handle : 0,
+            buf, mSlots[buf].mGraphicBuffer->handle);
+
+    // release old buffer
+    if (mCurrentTexture != BufferQueue::INVALID_BUFFER_SLOT) {
+        status_t status = releaseBufferLocked(mCurrentTexture, mEglDisplay,
+                mEglSlots[mCurrentTexture].mEglFence);
+        if (status != NO_ERROR && status != BufferQueue::STALE_BUFFER_SLOT) {
+            ST_LOGE("releaseAndUpdate: failed to release buffer: %s (%d)",
+                   strerror(-status), status);
+            err = status;
+            // keep going, with error raised [?]
+        }
+    }
+
+    // Update the GLConsumer state.
+    mCurrentTexture = buf;
+    mCurrentTextureBuf = mSlots[buf].mGraphicBuffer;
+    mCurrentCrop = item.mCrop;
+    mCurrentTransform = item.mTransform;
+    mCurrentScalingMode = item.mScalingMode;
+    mCurrentTimestamp = item.mTimestamp;
+    mCurrentFence = item.mFence;
+
+    computeCurrentTransformMatrixLocked();
+
+    return err;
+}
+
+status_t GLConsumer::bindTextureImageLocked() {
+    if (mEglDisplay == EGL_NO_DISPLAY) {
+        ALOGE("bindTextureImage: invalid display");
+        return INVALID_OPERATION;
+    }
+
+    GLint error;
+    while ((error = glGetError()) != GL_NO_ERROR) {
+        ST_LOGW("bindTextureImage: clearing GL error: %#04x", error);
+    }
+
+    glBindTexture(mTexTarget, mTexName);
+    if (mCurrentTexture == BufferQueue::INVALID_BUFFER_SLOT) {
+        if (mCurrentTextureBuf == NULL) {
+            ST_LOGE("bindTextureImage: no currently-bound texture");
+            return NO_INIT;
+        }
+        status_t err = bindUnslottedBufferLocked(mEglDisplay);
+        if (err != NO_ERROR) {
+            return err;
+        }
+    } else {
+        EGLImageKHR image = mEglSlots[mCurrentTexture].mEglImage;
+
+        glEGLImageTargetTexture2DOES(mTexTarget, (GLeglImageOES)image);
+
+        while ((error = glGetError()) != GL_NO_ERROR) {
+            ST_LOGE("bindTextureImage: error binding external texture image %p"
+                    ": %#04x", image, error);
+            return UNKNOWN_ERROR;
+        }
+    }
+
+    // Wait for the new buffer to be ready.
+    return doGLFenceWaitLocked();
+
+}
+
+status_t GLConsumer::checkAndUpdateEglStateLocked() {
+    EGLDisplay dpy = eglGetCurrentDisplay();
+    EGLContext ctx = eglGetCurrentContext();
+
+    if ((mEglDisplay != dpy && mEglDisplay != EGL_NO_DISPLAY) ||
+            dpy == EGL_NO_DISPLAY) {
+        ST_LOGE("checkAndUpdateEglState: invalid current EGLDisplay");
+        return INVALID_OPERATION;
+    }
+
+    if ((mEglContext != ctx && mEglContext != EGL_NO_CONTEXT) ||
+            ctx == EGL_NO_CONTEXT) {
+        ST_LOGE("checkAndUpdateEglState: invalid current EGLContext");
+        return INVALID_OPERATION;
+    }
+
+    mEglDisplay = dpy;
+    mEglContext = ctx;
+    return NO_ERROR;
+}
+
+void GLConsumer::setReleaseFence(int fenceFd) {
+    sp<Fence> fence(new Fence(fenceFd));
+    if (fenceFd == -1 || mCurrentTexture == BufferQueue::INVALID_BUFFER_SLOT)
+        return;
+    status_t err = addReleaseFence(mCurrentTexture, fence);
+    if (err != OK) {
+        ST_LOGE("setReleaseFence: failed to add the fence: %s (%d)",
+                strerror(-err), err);
+    }
+}
+
+status_t GLConsumer::detachFromContext() {
+    ATRACE_CALL();
+    ST_LOGV("detachFromContext");
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        ST_LOGE("detachFromContext: abandoned GLConsumer");
+        return NO_INIT;
+    }
+
+    if (!mAttached) {
+        ST_LOGE("detachFromContext: GLConsumer is not attached to a "
+                "context");
+        return INVALID_OPERATION;
+    }
+
+    EGLDisplay dpy = eglGetCurrentDisplay();
+    EGLContext ctx = eglGetCurrentContext();
+
+    if (mEglDisplay != dpy && mEglDisplay != EGL_NO_DISPLAY) {
+        ST_LOGE("detachFromContext: invalid current EGLDisplay");
+        return INVALID_OPERATION;
+    }
+
+    if (mEglContext != ctx && mEglContext != EGL_NO_CONTEXT) {
+        ST_LOGE("detachFromContext: invalid current EGLContext");
+        return INVALID_OPERATION;
+    }
+
+    if (dpy != EGL_NO_DISPLAY && ctx != EGL_NO_CONTEXT) {
+        status_t err = syncForReleaseLocked(dpy);
+        if (err != OK) {
+            return err;
+        }
+
+        glDeleteTextures(1, &mTexName);
+    }
+
+    // Because we're giving up the EGLDisplay we need to free all the EGLImages
+    // that are associated with it.  They'll be recreated when the
+    // GLConsumer gets attached to a new OpenGL ES context (and thus gets a
+    // new EGLDisplay).
+    for (int i =0; i < BufferQueue::NUM_BUFFER_SLOTS; i++) {
+        EGLImageKHR img = mEglSlots[i].mEglImage;
+        if (img != EGL_NO_IMAGE_KHR) {
+            eglDestroyImageKHR(mEglDisplay, img);
+            mEglSlots[i].mEglImage = EGL_NO_IMAGE_KHR;
+        }
+    }
+
+    mEglDisplay = EGL_NO_DISPLAY;
+    mEglContext = EGL_NO_CONTEXT;
+    mAttached = false;
+
+    return OK;
+}
+
+status_t GLConsumer::attachToContext(GLuint tex) {
+    ATRACE_CALL();
+    ST_LOGV("attachToContext");
+    Mutex::Autolock lock(mMutex);
+
+    if (mAbandoned) {
+        ST_LOGE("attachToContext: abandoned GLConsumer");
+        return NO_INIT;
+    }
+
+    if (mAttached) {
+        ST_LOGE("attachToContext: GLConsumer is already attached to a "
+                "context");
+        return INVALID_OPERATION;
+    }
+
+    EGLDisplay dpy = eglGetCurrentDisplay();
+    EGLContext ctx = eglGetCurrentContext();
+
+    if (dpy == EGL_NO_DISPLAY) {
+        ST_LOGE("attachToContext: invalid current EGLDisplay");
+        return INVALID_OPERATION;
+    }
+
+    if (ctx == EGL_NO_CONTEXT) {
+        ST_LOGE("attachToContext: invalid current EGLContext");
+        return INVALID_OPERATION;
+    }
+
+    // We need to bind the texture regardless of whether there's a current
+    // buffer.
+    glBindTexture(mTexTarget, tex);
+
+    if (mCurrentTextureBuf != NULL) {
+        // The EGLImageKHR that was associated with the slot was destroyed when
+        // the GLConsumer was detached from the old context, so we need to
+        // recreate it here.
+        status_t err = bindUnslottedBufferLocked(dpy);
+        if (err != NO_ERROR) {
+            return err;
+        }
+    }
+
+    mEglDisplay = dpy;
+    mEglContext = ctx;
+    mTexName = tex;
+    mAttached = true;
+
+    return OK;
+}
+
+status_t GLConsumer::bindUnslottedBufferLocked(EGLDisplay dpy) {
+    ST_LOGV("bindUnslottedBuffer ct=%d ctb=%p",
+            mCurrentTexture, mCurrentTextureBuf.get());
+
+    // Create a temporary EGLImageKHR.
+    EGLImageKHR image = createImage(dpy, mCurrentTextureBuf);
+    if (image == EGL_NO_IMAGE_KHR) {
+        return UNKNOWN_ERROR;
+    }
+
+    // Attach the current buffer to the GL texture.
+    glEGLImageTargetTexture2DOES(mTexTarget, (GLeglImageOES)image);
+
+    GLint error;
+    status_t err = OK;
+    while ((error = glGetError()) != GL_NO_ERROR) {
+        ST_LOGE("bindUnslottedBuffer: error binding external texture image %p "
+                "(slot %d): %#04x", image, mCurrentTexture, error);
+        err = UNKNOWN_ERROR;
+    }
+
+    // We destroy the EGLImageKHR here because the current buffer may no
+    // longer be associated with one of the buffer slots, so we have
+    // nowhere to to store it.  If the buffer is still associated with a
+    // slot then another EGLImageKHR will be created next time that buffer
+    // gets acquired in updateTexImage.
+    eglDestroyImageKHR(dpy, image);
+
+    return err;
+}
+
+
+status_t GLConsumer::syncForReleaseLocked(EGLDisplay dpy) {
+    ST_LOGV("syncForReleaseLocked");
+
+    if (mCurrentTexture != BufferQueue::INVALID_BUFFER_SLOT) {
+        if (sUseNativeFenceSync) {
+            EGLSyncKHR sync = eglCreateSyncKHR(dpy,
+                    EGL_SYNC_NATIVE_FENCE_ANDROID, NULL);
+            if (sync == EGL_NO_SYNC_KHR) {
+                ST_LOGE("syncForReleaseLocked: error creating EGL fence: %#x",
+                        eglGetError());
+                return UNKNOWN_ERROR;
+            }
+            glFlush();
+            int fenceFd = eglDupNativeFenceFDANDROID(dpy, sync);
+            eglDestroySyncKHR(dpy, sync);
+            if (fenceFd == EGL_NO_NATIVE_FENCE_FD_ANDROID) {
+                ST_LOGE("syncForReleaseLocked: error dup'ing native fence "
+                        "fd: %#x", eglGetError());
+                return UNKNOWN_ERROR;
+            }
+            sp<Fence> fence(new Fence(fenceFd));
+            status_t err = addReleaseFenceLocked(mCurrentTexture, fence);
+            if (err != OK) {
+                ST_LOGE("syncForReleaseLocked: error adding release fence: "
+                        "%s (%d)", strerror(-err), err);
+                return err;
+            }
+        } else if (mUseFenceSync) {
+            EGLSyncKHR fence = mEglSlots[mCurrentTexture].mEglFence;
+            if (fence != EGL_NO_SYNC_KHR) {
+                // There is already a fence for the current slot.  We need to
+                // wait on that before replacing it with another fence to
+                // ensure that all outstanding buffer accesses have completed
+                // before the producer accesses it.
+                EGLint result = eglClientWaitSyncKHR(dpy, fence, 0, 1000000000);
+                if (result == EGL_FALSE) {
+                    ST_LOGE("syncForReleaseLocked: error waiting for previous "
+                            "fence: %#x", eglGetError());
+                    return UNKNOWN_ERROR;
+                } else if (result == EGL_TIMEOUT_EXPIRED_KHR) {
+                    ST_LOGE("syncForReleaseLocked: timeout waiting for previous "
+                            "fence");
+                    return TIMED_OUT;
+                }
+                eglDestroySyncKHR(dpy, fence);
+            }
+
+            // Create a fence for the outstanding accesses in the current
+            // OpenGL ES context.
+            fence = eglCreateSyncKHR(dpy, EGL_SYNC_FENCE_KHR, NULL);
+            if (fence == EGL_NO_SYNC_KHR) {
+                ST_LOGE("syncForReleaseLocked: error creating fence: %#x",
+                        eglGetError());
+                return UNKNOWN_ERROR;
+            }
+            glFlush();
+            mEglSlots[mCurrentTexture].mEglFence = fence;
+        }
+    }
+
+    return OK;
+}
+
+bool GLConsumer::isExternalFormat(uint32_t format)
+{
+    switch (format) {
+    // supported YUV formats
+    case HAL_PIXEL_FORMAT_YV12:
+    // Legacy/deprecated YUV formats
+    case HAL_PIXEL_FORMAT_YCbCr_422_SP:
+    case HAL_PIXEL_FORMAT_YCrCb_420_SP:
+    case HAL_PIXEL_FORMAT_YCbCr_422_I:
+        return true;
+    }
+
+    // Any OEM format needs to be considered
+    if (format>=0x100 && format<=0x1FF)
+        return true;
+
+    return false;
+}
+
+GLenum GLConsumer::getCurrentTextureTarget() const {
+    return mTexTarget;
+}
+
+void GLConsumer::getTransformMatrix(float mtx[16]) {
+    Mutex::Autolock lock(mMutex);
+    memcpy(mtx, mCurrentTransformMatrix, sizeof(mCurrentTransformMatrix));
+}
+
+void GLConsumer::setFilteringEnabled(bool enabled) {
+    Mutex::Autolock lock(mMutex);
+    if (mAbandoned) {
+        ST_LOGE("setFilteringEnabled: GLConsumer is abandoned!");
+        return;
+    }
+    bool needsRecompute = mFilteringEnabled != enabled;
+    mFilteringEnabled = enabled;
+
+    if (needsRecompute && mCurrentTextureBuf==NULL) {
+        ST_LOGD("setFilteringEnabled called with mCurrentTextureBuf == NULL");
+    }
+
+    if (needsRecompute && mCurrentTextureBuf != NULL) {
+        computeCurrentTransformMatrixLocked();
+    }
+}
+
+void GLConsumer::computeCurrentTransformMatrixLocked() {
+    ST_LOGV("computeCurrentTransformMatrixLocked");
+
+    float xform[16];
+    for (int i = 0; i < 16; i++) {
+        xform[i] = mtxIdentity[i];
+    }
+    if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_FLIP_H) {
+        float result[16];
+        mtxMul(result, xform, mtxFlipH);
+        for (int i = 0; i < 16; i++) {
+            xform[i] = result[i];
+        }
+    }
+    if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_FLIP_V) {
+        float result[16];
+        mtxMul(result, xform, mtxFlipV);
+        for (int i = 0; i < 16; i++) {
+            xform[i] = result[i];
+        }
+    }
+    if (mCurrentTransform & NATIVE_WINDOW_TRANSFORM_ROT_90) {
+        float result[16];
+        mtxMul(result, xform, mtxRot90);
+        for (int i = 0; i < 16; i++) {
+            xform[i] = result[i];
+        }
+    }
+
+    sp<GraphicBuffer>& buf(mCurrentTextureBuf);
+
+    if (buf == NULL) {
+        ST_LOGD("computeCurrentTransformMatrixLocked: mCurrentTextureBuf is NULL");
+    }
+
+    Rect cropRect = mCurrentCrop;
+    float tx = 0.0f, ty = 0.0f, sx = 1.0f, sy = 1.0f;
+    float bufferWidth = buf->getWidth();
+    float bufferHeight = buf->getHeight();
+    if (!cropRect.isEmpty()) {
+        float shrinkAmount = 0.0f;
+        if (mFilteringEnabled) {
+            // In order to prevent bilinear sampling beyond the edge of the
+            // crop rectangle we may need to shrink it by 2 texels in each
+            // dimension.  Normally this would just need to take 1/2 a texel
+            // off each end, but because the chroma channels of YUV420 images
+            // are subsampled we may need to shrink the crop region by a whole
+            // texel on each side.
+            switch (buf->getPixelFormat()) {
+                case PIXEL_FORMAT_RGBA_8888:
+                case PIXEL_FORMAT_RGBX_8888:
+                case PIXEL_FORMAT_RGB_888:
+                case PIXEL_FORMAT_RGB_565:
+                case PIXEL_FORMAT_BGRA_8888:
+                case PIXEL_FORMAT_RGBA_5551:
+                case PIXEL_FORMAT_RGBA_4444:
+                    // We know there's no subsampling of any channels, so we
+                    // only need to shrink by a half a pixel.
+                    shrinkAmount = 0.5;
+                    break;
+
+                default:
+                    // If we don't recognize the format, we must assume the
+                    // worst case (that we care about), which is YUV420.
+                    shrinkAmount = 1.0;
+                    break;
+            }
+        }
+
+        // Only shrink the dimensions that are not the size of the buffer.
+        if (cropRect.width() < bufferWidth) {
+            tx = (float(cropRect.left) + shrinkAmount) / bufferWidth;
+            sx = (float(cropRect.width()) - (2.0f * shrinkAmount)) /
+                    bufferWidth;
+        }
+        if (cropRect.height() < bufferHeight) {
+            ty = (float(bufferHeight - cropRect.bottom) + shrinkAmount) /
+                    bufferHeight;
+            sy = (float(cropRect.height()) - (2.0f * shrinkAmount)) /
+                    bufferHeight;
+        }
+    }
+    float crop[16] = {
+        sx, 0, 0, 0,
+        0, sy, 0, 0,
+        0, 0, 1, 0,
+        tx, ty, 0, 1,
+    };
+
+    float mtxBeforeFlipV[16];
+    mtxMul(mtxBeforeFlipV, crop, xform);
+
+    // SurfaceFlinger expects the top of its window textures to be at a Y
+    // coordinate of 0, so GLConsumer must behave the same way.  We don't
+    // want to expose this to applications, however, so we must add an
+    // additional vertical flip to the transform after all the other transforms.
+    mtxMul(mCurrentTransformMatrix, mtxFlipV, mtxBeforeFlipV);
+}
+
+nsecs_t GLConsumer::getTimestamp() {
+    ST_LOGV("getTimestamp");
+    Mutex::Autolock lock(mMutex);
+    return mCurrentTimestamp;
+}
+
+EGLImageKHR GLConsumer::createImage(EGLDisplay dpy,
+        const sp<GraphicBuffer>& graphicBuffer) {
+    EGLClientBuffer cbuf = (EGLClientBuffer)graphicBuffer->getNativeBuffer();
+    EGLint attrs[] = {
+        EGL_IMAGE_PRESERVED_KHR,    EGL_TRUE,
+        EGL_NONE,
+    };
+    EGLImageKHR image = eglCreateImageKHR(dpy, EGL_NO_CONTEXT,
+            EGL_NATIVE_BUFFER_ANDROID, cbuf, attrs);
+    if (image == EGL_NO_IMAGE_KHR) {
+        EGLint error = eglGetError();
+        ST_LOGE("error creating EGLImage: %#x", error);
+    }
+    return image;
+}
+
+sp<GraphicBuffer> GLConsumer::getCurrentBuffer() const {
+    Mutex::Autolock lock(mMutex);
+    return mCurrentTextureBuf;
+}
+
+Rect GLConsumer::getCurrentCrop() const {
+    Mutex::Autolock lock(mMutex);
+
+    Rect outCrop = mCurrentCrop;
+    if (mCurrentScalingMode == NATIVE_WINDOW_SCALING_MODE_SCALE_CROP) {
+        int32_t newWidth = mCurrentCrop.width();
+        int32_t newHeight = mCurrentCrop.height();
+
+        if (newWidth * mDefaultHeight > newHeight * mDefaultWidth) {
+            newWidth = newHeight * mDefaultWidth / mDefaultHeight;
+            ST_LOGV("too wide: newWidth = %d", newWidth);
+        } else if (newWidth * mDefaultHeight < newHeight * mDefaultWidth) {
+            newHeight = newWidth * mDefaultHeight / mDefaultWidth;
+            ST_LOGV("too tall: newHeight = %d", newHeight);
+        }
+
+        // The crop is too wide
+        if (newWidth < mCurrentCrop.width()) {
+            int32_t dw = (newWidth - mCurrentCrop.width())/2;
+            outCrop.left -=dw;
+            outCrop.right += dw;
+        // The crop is too tall
+        } else if (newHeight < mCurrentCrop.height()) {
+            int32_t dh = (newHeight - mCurrentCrop.height())/2;
+            outCrop.top -= dh;
+            outCrop.bottom += dh;
+        }
+
+        ST_LOGV("getCurrentCrop final crop [%d,%d,%d,%d]",
+            outCrop.left, outCrop.top,
+            outCrop.right,outCrop.bottom);
+    }
+
+    return outCrop;
+}
+
+uint32_t GLConsumer::getCurrentTransform() const {
+    Mutex::Autolock lock(mMutex);
+    return mCurrentTransform;
+}
+
+uint32_t GLConsumer::getCurrentScalingMode() const {
+    Mutex::Autolock lock(mMutex);
+    return mCurrentScalingMode;
+}
+
+sp<Fence> GLConsumer::getCurrentFence() const {
+    Mutex::Autolock lock(mMutex);
+    return mCurrentFence;
+}
+
+status_t GLConsumer::doGLFenceWait() const {
+    Mutex::Autolock lock(mMutex);
+    return doGLFenceWaitLocked();
+}
+
+status_t GLConsumer::doGLFenceWaitLocked() const {
+
+    EGLDisplay dpy = eglGetCurrentDisplay();
+    EGLContext ctx = eglGetCurrentContext();
+
+    if (mEglDisplay != dpy || mEglDisplay == EGL_NO_DISPLAY) {
+        ST_LOGE("doGLFenceWait: invalid current EGLDisplay");
+        return INVALID_OPERATION;
+    }
+
+    if (mEglContext != ctx || mEglContext == EGL_NO_CONTEXT) {
+        ST_LOGE("doGLFenceWait: invalid current EGLContext");
+        return INVALID_OPERATION;
+    }
+
+    if (mCurrentFence != NULL) {
+        if (useWaitSync) {
+            // Create an EGLSyncKHR from the current fence.
+            int fenceFd = mCurrentFence->dup();
+            if (fenceFd == -1) {
+                ST_LOGE("doGLFenceWait: error dup'ing fence fd: %d", errno);
+                return -errno;
+            }
+            EGLint attribs[] = {
+                EGL_SYNC_NATIVE_FENCE_FD_ANDROID, fenceFd,
+                EGL_NONE
+            };
+            EGLSyncKHR sync = eglCreateSyncKHR(dpy,
+                    EGL_SYNC_NATIVE_FENCE_ANDROID, attribs);
+            if (sync == EGL_NO_SYNC_KHR) {
+                close(fenceFd);
+                ST_LOGE("doGLFenceWait: error creating EGL fence: %#x",
+                        eglGetError());
+                return UNKNOWN_ERROR;
+            }
+
+            // XXX: The spec draft is inconsistent as to whether this should
+            // return an EGLint or void.  Ignore the return value for now, as
+            // it's not strictly needed.
+            eglWaitSyncANDROID(dpy, sync, 0);
+            EGLint eglErr = eglGetError();
+            eglDestroySyncKHR(dpy, sync);
+            if (eglErr != EGL_SUCCESS) {
+                ST_LOGE("doGLFenceWait: error waiting for EGL fence: %#x",
+                        eglErr);
+                return UNKNOWN_ERROR;
+            }
+        } else {
+            status_t err = mCurrentFence->waitForever(1000,
+                    "GLConsumer::doGLFenceWaitLocked");
+            if (err != NO_ERROR) {
+                ST_LOGE("doGLFenceWait: error waiting for fence: %d", err);
+                return err;
+            }
+        }
+    }
+
+    return NO_ERROR;
+}
+
+bool GLConsumer::isSynchronousMode() const {
+    Mutex::Autolock lock(mMutex);
+    return mBufferQueue->isSynchronousMode();
+}
+
+void GLConsumer::freeBufferLocked(int slotIndex) {
+    ST_LOGV("freeBufferLocked: slotIndex=%d", slotIndex);
+    if (slotIndex == mCurrentTexture) {
+        mCurrentTexture = BufferQueue::INVALID_BUFFER_SLOT;
+    }
+    EGLImageKHR img = mEglSlots[slotIndex].mEglImage;
+    if (img != EGL_NO_IMAGE_KHR) {
+        ST_LOGV("destroying EGLImage dpy=%p img=%p", mEglDisplay, img);
+        eglDestroyImageKHR(mEglDisplay, img);
+    }
+    mEglSlots[slotIndex].mEglImage = EGL_NO_IMAGE_KHR;
+    ConsumerBase::freeBufferLocked(slotIndex);
+}
+
+void GLConsumer::abandonLocked() {
+    ST_LOGV("abandonLocked");
+    mCurrentTextureBuf.clear();
+    ConsumerBase::abandonLocked();
+}
+
+void GLConsumer::setName(const String8& name) {
+    Mutex::Autolock _l(mMutex);
+    mName = name;
+    mBufferQueue->setConsumerName(name);
+}
+
+status_t GLConsumer::setDefaultBufferFormat(uint32_t defaultFormat) {
+    Mutex::Autolock lock(mMutex);
+    return mBufferQueue->setDefaultBufferFormat(defaultFormat);
+}
+
+status_t GLConsumer::setConsumerUsageBits(uint32_t usage) {
+    Mutex::Autolock lock(mMutex);
+    usage |= DEFAULT_USAGE_FLAGS;
+    return mBufferQueue->setConsumerUsageBits(usage);
+}
+
+status_t GLConsumer::setTransformHint(uint32_t hint) {
+    Mutex::Autolock lock(mMutex);
+    return mBufferQueue->setTransformHint(hint);
+}
+
+// Used for refactoring BufferQueue from GLConsumer
+// Should not be in final interface once users of GLConsumer are clean up.
+status_t GLConsumer::setSynchronousMode(bool enabled) {
+    Mutex::Autolock lock(mMutex);
+    return mBufferQueue->setSynchronousMode(enabled);
+}
+
+void GLConsumer::dumpLocked(String8& result, const char* prefix,
+        char* buffer, size_t size) const
+{
+    snprintf(buffer, size,
+       "%smTexName=%d mCurrentTexture=%d\n"
+       "%smCurrentCrop=[%d,%d,%d,%d] mCurrentTransform=%#x\n",
+       prefix, mTexName, mCurrentTexture, prefix, mCurrentCrop.left,
+       mCurrentCrop.top, mCurrentCrop.right, mCurrentCrop.bottom,
+       mCurrentTransform);
+    result.append(buffer);
+
+    ConsumerBase::dumpLocked(result, prefix, buffer, size);
+}
+
+static void mtxMul(float out[16], const float a[16], const float b[16]) {
+    out[0] = a[0]*b[0] + a[4]*b[1] + a[8]*b[2] + a[12]*b[3];
+    out[1] = a[1]*b[0] + a[5]*b[1] + a[9]*b[2] + a[13]*b[3];
+    out[2] = a[2]*b[0] + a[6]*b[1] + a[10]*b[2] + a[14]*b[3];
+    out[3] = a[3]*b[0] + a[7]*b[1] + a[11]*b[2] + a[15]*b[3];
+
+    out[4] = a[0]*b[4] + a[4]*b[5] + a[8]*b[6] + a[12]*b[7];
+    out[5] = a[1]*b[4] + a[5]*b[5] + a[9]*b[6] + a[13]*b[7];
+    out[6] = a[2]*b[4] + a[6]*b[5] + a[10]*b[6] + a[14]*b[7];
+    out[7] = a[3]*b[4] + a[7]*b[5] + a[11]*b[6] + a[15]*b[7];
+
+    out[8] = a[0]*b[8] + a[4]*b[9] + a[8]*b[10] + a[12]*b[11];
+    out[9] = a[1]*b[8] + a[5]*b[9] + a[9]*b[10] + a[13]*b[11];
+    out[10] = a[2]*b[8] + a[6]*b[9] + a[10]*b[10] + a[14]*b[11];
+    out[11] = a[3]*b[8] + a[7]*b[9] + a[11]*b[10] + a[15]*b[11];
+
+    out[12] = a[0]*b[12] + a[4]*b[13] + a[8]*b[14] + a[12]*b[15];
+    out[13] = a[1]*b[12] + a[5]*b[13] + a[9]*b[14] + a[13]*b[15];
+    out[14] = a[2]*b[12] + a[6]*b[13] + a[10]*b[14] + a[14]*b[15];
+    out[15] = a[3]*b[12] + a[7]*b[13] + a[11]*b[14] + a[15]*b[15];
+}
+
+}; // namespace android