diff --git a/opengl/libagl/copybit.cpp b/opengl/libagl/copybit.cpp
new file mode 100644
index 0000000..427e42a
--- /dev/null
+++ b/opengl/libagl/copybit.cpp
@@ -0,0 +1,370 @@
+/*
+**
+** Copyright 2009, 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 <stdlib.h>
+#include <stdio.h>
+
+#include "context.h"
+#include "fp.h"
+#include "state.h"
+#include "matrix.h"
+#include "vertex.h"
+#include "light.h"
+#include "primitives.h"
+#include "texture.h"
+#include "BufferObjectManager.h"
+
+#include "TextureObjectManager.h"
+#include <hardware/gralloc.h>
+#include <hardware/copybit.h>
+#include "gralloc_priv.h"
+
+// ----------------------------------------------------------------------------
+
+namespace android {
+
+static void textureToCopyBitImage(const GGLSurface* surface, int fd, copybit_image_t* img) {
+    img->w      = surface->stride;
+    img->h      = surface->height;
+    img->format = surface->format;
+    img->offset = 0;
+    img->base   = surface->data;
+    img->fd     = fd;
+}
+
+struct clipRectRegion : public copybit_region_t {
+    clipRectRegion(ogles_context_t* c) {
+        next = iterate;
+        int x = c->viewport.scissor.x;
+        int y = c->viewport.scissor.y;
+        r.l = x;
+        r.t = y;
+        r.r = x + c->viewport.scissor.w;
+        r.b = y + c->viewport.scissor.h;
+        firstTime = true;
+    }
+private:
+    static int iterate(copybit_region_t const * self, copybit_rect_t* rect) {
+        clipRectRegion* myself = (clipRectRegion*) self;
+        if (myself->firstTime) {
+            myself->firstTime = false;
+            *rect = myself->r;
+            return 1;
+        }
+        return 0;
+    }
+    mutable copybit_rect_t r;
+    mutable bool firstTime;
+};
+
+static bool supportedCopybitsFormat(int format) {
+    switch (format) {
+    case COPYBIT_FORMAT_RGBA_8888:
+    case COPYBIT_FORMAT_RGB_565:
+    case COPYBIT_FORMAT_BGRA_8888:
+    case COPYBIT_FORMAT_RGBA_5551:
+    case COPYBIT_FORMAT_RGBA_4444:
+    case COPYBIT_FORMAT_YCbCr_422_SP:
+    case COPYBIT_FORMAT_YCbCr_420_SP:
+        return true;
+    default:
+        return false;
+    }
+}
+
+static bool hasAlpha(int format) {
+    switch (format) {
+    case COPYBIT_FORMAT_RGBA_8888:
+    case COPYBIT_FORMAT_BGRA_8888:
+    case COPYBIT_FORMAT_RGBA_5551:
+    case COPYBIT_FORMAT_RGBA_4444:
+        return true;
+    default:
+        return false;
+    }
+}
+
+static inline int fixedToByte(GGLfixed val) {
+    return (val - (val >> 8)) >> 8;
+}
+
+/**
+ * Performs a quick check of the rendering state. If this function returns
+ * false we cannot use the copybit driver.
+ */
+
+static bool checkContext(ogles_context_t* c) {
+
+	// By convenction copybitQuickCheckContext() has already returned true.
+	// avoid checking the same information again.
+	
+    if (c->copybits.blitEngine == NULL
+            || (c->rasterizer.state.enables
+                    & (GGL_ENABLE_DEPTH_TEST|GGL_ENABLE_FOG)) != 0) {
+        return false;
+    }
+
+    // Note: The drawSurfaceFd is only set for destination
+    // surfaces types that are supported by the hardware and
+    // do not have an alpha channel. So we don't have to re-check that here.
+
+    static const int tmu = 0;
+    texture_unit_t& u(c->textures.tmu[tmu]);
+    EGLTextureObject* textureObject = u.texture;
+
+    if (!supportedCopybitsFormat(textureObject->surface.format)) {
+        return false;
+    }
+    return true;
+}
+
+
+static bool copybit(GLint x, GLint y,
+        GLint w, GLint h,
+        EGLTextureObject* textureObject,
+        const GLint* crop_rect,
+        int transform,
+        ogles_context_t* c)
+{
+    // We assume checkContext has already been called and has already
+    // returned true.
+
+    const GGLSurface& cbSurface = c->rasterizer.state.buffers.color.s;
+
+    y = cbSurface.height - (y + h);
+
+    const GLint Ucr = crop_rect[0];
+    const GLint Vcr = crop_rect[1];
+    const GLint Wcr = crop_rect[2];
+    const GLint Hcr = crop_rect[3];
+
+    int32_t dsdx = (Wcr << 16) / w;   // dsdx =  ((Wcr/w)/Wt)*Wt
+    int32_t dtdy = ((-Hcr) <<  16) / h;   // dtdy = -((Hcr/h)/Ht)*Ht
+
+    if (dsdx < c->copybits.minScale || dsdx > c->copybits.maxScale
+            || dtdy < c->copybits.minScale || dtdy > c->copybits.maxScale) {
+        // The requested scale is out of the range the hardware
+        // can support.
+        return false;
+    }
+
+    int32_t texelArea = gglMulx(dtdy, dsdx);
+    if (texelArea < FIXED_ONE && textureObject->mag_filter != GL_LINEAR) {
+        // Non-linear filtering on a texture enlargement.
+        return false;
+    }
+
+    if (texelArea > FIXED_ONE && textureObject->min_filter != GL_LINEAR) {
+        // Non-linear filtering on an texture shrink.
+        return false;
+    }
+
+    const uint32_t enables = c->rasterizer.state.enables;
+    int planeAlpha = 255;
+    static const int tmu = 0;
+    texture_t& tev(c->rasterizer.state.texture[tmu]);
+    bool srcTextureHasAlpha = hasAlpha(textureObject->surface.format);
+    switch (tev.env) {
+
+    case GGL_REPLACE:
+        if (!srcTextureHasAlpha) {
+            planeAlpha = fixedToByte(c->currentColorClamped.a);
+        }
+        break;
+
+    case GGL_MODULATE:
+        if (! (c->currentColorClamped.r == FIXED_ONE
+                && c->currentColorClamped.g == FIXED_ONE
+                && c->currentColorClamped.b == FIXED_ONE)) {
+            return false;
+        }
+        planeAlpha = fixedToByte(c->currentColorClamped.a);
+        break;
+
+    default:
+        // Incompatible texture environment.
+        return false;
+    }
+
+    bool blending = false;
+
+    if ((enables & GGL_ENABLE_BLENDING)
+            && !(c->rasterizer.state.blend.src == GL_ONE
+                    && c->rasterizer.state.blend.dst == GL_ZERO)) {
+        // Blending is OK if it is
+        // the exact kind of blending that the copybits hardware supports.
+        // Note: The hardware only supports
+        // GL_SRC_ALPHA / GL_ONE_MINUS_SRC_ALPHA,
+        // But the surface flinger uses GL_ONE / GL_ONE_MINUS_SRC_ALPHA.
+        // We substitute GL_SRC_ALPHA / GL_ONE_MINUS_SRC_ALPHA in that case,
+        // because the performance is worth it, even if the results are
+        // not correct.
+        if (!((c->rasterizer.state.blend.src == GL_SRC_ALPHA
+                || c->rasterizer.state.blend.src == GL_ONE)
+                && c->rasterizer.state.blend.dst == GL_ONE_MINUS_SRC_ALPHA
+                && c->rasterizer.state.blend.alpha_separate == 0)) {
+            // Incompatible blend mode.
+            return false;
+        }
+        blending = true;
+    } else {
+        // No blending is OK if we are not using alpha.
+        if (srcTextureHasAlpha || planeAlpha != 255) {
+            // Incompatible alpha
+            return false;
+        }
+    }
+
+    if (srcTextureHasAlpha && planeAlpha != 255) {
+        // Can't do two types of alpha at once.
+        return false;
+    }
+
+    // LOGW("calling copybits");
+
+    copybit_device_t* copybit = c->copybits.blitEngine;
+    copybit_image_t dst;
+    textureToCopyBitImage(&cbSurface, c->copybits.drawSurfaceFd, &dst);
+    copybit_rect_t drect = {x, y, x+w, y+h};
+
+    copybit_image_t src;
+    textureToCopyBitImage(&textureObject->surface, textureObject->copybits_fd,
+            &src);
+    copybit_rect_t srect = { Ucr, Vcr + Hcr, Ucr + Wcr, Vcr };
+
+    copybit->set_parameter(copybit, COPYBIT_TRANSFORM, transform);
+    copybit->set_parameter(copybit, COPYBIT_PLANE_ALPHA, planeAlpha);
+
+    copybit->set_parameter(copybit, COPYBIT_DITHER,
+            (enables & GGL_ENABLE_DITHER) ? COPYBIT_ENABLE : COPYBIT_DISABLE);
+
+    clipRectRegion it(c);
+    copybit->stretch(copybit, &dst, &src, &drect, &srect, &it);
+    return true;
+}
+
+/*
+ * Try to draw a triangle fan with copybit, return false if we fail.
+ */
+bool drawTrangleFanWithCopybit_impl(ogles_context_t* c, GLint first, GLsizei count) {
+    if (! checkContext(c)) {
+        return false;
+    }
+
+    c->arrays.compileElements(c, c->vc.vBuffer, 0, 4);
+    // Is the result a screen aligned rectangle?
+    int sx[4];
+    int sy[4];
+    for (int i = 0; i < 4; i++) {
+        GLfixed x = c->vc.vBuffer[i].window.x;
+        GLfixed y = c->vc.vBuffer[i].window.y;
+        if (x < 0 || y < 0 || (x & 0xf) != 0 || (y & 0xf) != 0) {
+            return false;
+        }
+        sx[i] = x >> 4;
+        sy[i] = y >> 4;
+    }
+
+    /*
+     * This is the pattern we're looking for:
+     *    (2)--(3)
+     *     |\   |
+     *     | \  |
+     *     |  \ |
+     *     |   \|
+     *    (1)--(0)
+     *
+     */
+    int dx[4];
+    int dy[4];
+    for (int i = 0; i < 4; i++) {
+        int i1 = (i + 1) & 3;
+        dx[i] = sx[i] - sx[i1];
+        dy[i] = sy[i] - sy[i1];
+    }
+    if (dx[1] | dx[3] | dy[0] | dy[2]) {
+        return false;
+    }
+    if (dx[0] != -dx[2] || dy[1] != -dy[3]) {
+        return false;
+    }
+
+    int x = sx[1];
+    int y = sy[1];
+    int w = dx[0];
+    int h = dy[3];
+
+    // We expect the texture coordinates to always be the unit square:
+
+    static const GLfixed kExpectedUV[8] = {
+        0, 0,
+        0, FIXED_ONE,
+        FIXED_ONE, FIXED_ONE,
+        FIXED_ONE, 0
+    };
+    {
+        const GLfixed* pExpected = &kExpectedUV[0];
+        for (int i = 0; i < 4; i++) {
+            GLfixed u = c->vc.vBuffer[i].texture[0].x;
+            GLfixed v = c->vc.vBuffer[i].texture[0].y;
+            if (u != *pExpected++ || v != *pExpected++) {
+                return false;
+            }
+        }
+    }
+
+    static const int tmu = 0;
+    texture_unit_t& u(c->textures.tmu[tmu]);
+    EGLTextureObject* textureObject = u.texture;
+
+    GLint tWidth = textureObject->surface.width;
+    GLint tHeight = textureObject->surface.height;
+    GLint crop_rect[4] = {0, tHeight, tWidth, -tHeight};
+
+    const GGLSurface& cbSurface = c->rasterizer.state.buffers.color.s;
+    y = cbSurface.height - (y + h);
+
+    return copybit(x, y, w, h, textureObject, crop_rect,
+            COPYBIT_TRANSFORM_ROT_90, c);
+}
+
+/*
+ * Try to drawTexiOESWithCopybit, return false if we fail.
+ */
+
+bool drawTexiOESWithCopybit_impl(GLint x, GLint y, GLint z,
+        GLint w, GLint h, ogles_context_t* c)
+{
+    // quickly process empty rects
+    if ((w|h) <= 0) {
+        return true;
+    }
+
+    if (! checkContext(c)) {
+        return false;
+    }
+
+    static const int tmu = 0;
+    texture_unit_t& u(c->textures.tmu[tmu]);
+    EGLTextureObject* textureObject = u.texture;
+
+    return copybit(x, y, w, h, textureObject, textureObject->crop_rect,
+            0, c);
+}
+
+} // namespace android
+