diff --git a/driver/rsdSampler.cpp b/driver/rsdSampler.cpp
index 96b27d4..c8c338f 100644
--- a/driver/rsdSampler.cpp
+++ b/driver/rsdSampler.cpp
@@ -29,11 +29,840 @@
 #include <GLES/glext.h>
 #endif
 
+typedef float float2 __attribute__((ext_vector_type(2)));
+typedef float float3 __attribute__((ext_vector_type(3)));
+typedef float float4 __attribute__((ext_vector_type(4)));
+typedef uint8_t uchar4 __attribute__((ext_vector_type(4)));
+
 using namespace android;
 using namespace android::renderscript;
 
-bool rsdSamplerInit(const android::renderscript::Context *,
-                    const android::renderscript::Sampler *) {
+#if defined(ARCH_ARM_HAVE_VFP)
+    #define LOCAL_CALL __attribute__((pcs("aapcs-vfp")))
+#else
+    #define LOCAL_CALL
+#endif
+
+// 565 Conversion bits taken from SkBitmap
+#define SK_R16_BITS     5
+#define SK_G16_BITS     6
+#define SK_B16_BITS     5
+
+#define SK_R16_SHIFT    (SK_B16_BITS + SK_G16_BITS)
+#define SK_G16_SHIFT    (SK_B16_BITS)
+#define SK_B16_SHIFT    0
+
+#define SK_R16_MASK     ((1 << SK_R16_BITS) - 1)
+#define SK_G16_MASK     ((1 << SK_G16_BITS) - 1)
+#define SK_B16_MASK     ((1 << SK_B16_BITS) - 1)
+
+static inline unsigned SkR16ToR32(unsigned r) {
+    return (r << (8 - SK_R16_BITS)) | (r >> (2 * SK_R16_BITS - 8));
+}
+
+static inline unsigned SkG16ToG32(unsigned g) {
+    return (g << (8 - SK_G16_BITS)) | (g >> (2 * SK_G16_BITS - 8));
+}
+
+static inline unsigned SkB16ToB32(unsigned b) {
+    return (b << (8 - SK_B16_BITS)) | (b >> (2 * SK_B16_BITS - 8));
+}
+
+#define SkPacked16ToR32(c)      SkR16ToR32(SkGetPackedR16(c))
+#define SkPacked16ToG32(c)      SkG16ToG32(SkGetPackedG16(c))
+#define SkPacked16ToB32(c)      SkB16ToB32(SkGetPackedB16(c))
+
+#define SkGetPackedR16(color)   (((unsigned)(color) >> SK_R16_SHIFT) & SK_R16_MASK)
+#define SkGetPackedG16(color)   (((unsigned)(color) >> SK_G16_SHIFT) & SK_G16_MASK)
+#define SkGetPackedB16(color)   (((unsigned)(color) >> SK_B16_SHIFT) & SK_B16_MASK)
+
+static float3 getFrom565(uint16_t color) {
+    float3 result;
+    result.x = (float)SkPacked16ToR32(color);
+    result.y = (float)SkPacked16ToG32(color);
+    result.z = (float)SkPacked16ToB32(color);
+    return result;
+}
+
+
+
+/**
+* Allocation sampling
+*/
+static inline float getElementAt1(const uint8_t *p, int32_t x) {
+    float r = p[x];
+    return r;
+}
+
+static inline float2 getElementAt2(const uint8_t *p, int32_t x) {
+    x *= 2;
+    float2 r = {p[x], p[x+1]};
+    return r;
+}
+
+static inline float3 getElementAt3(const uint8_t *p, int32_t x) {
+    x *= 4;
+    float3 r = {p[x], p[x+1], p[x+2]};
+    return r;
+}
+
+static inline float4 getElementAt4(const uint8_t *p, int32_t x) {
+    x *= 4;
+    float4 r = {p[x], p[x+1], p[x+2], p[x+3]};
+    return r;
+}
+
+static inline float3 getElementAt565(const uint8_t *p, int32_t x) {
+    x *= 2;
+    float3 r = getFrom565(((const uint16_t *)p)[0]);
+    return r;
+}
+
+static inline float getElementAt1(const uint8_t *p, size_t stride, int32_t x, int32_t y) {
+    p += y * stride;
+    float r = p[x];
+    return r;
+}
+
+static inline float2 getElementAt2(const uint8_t *p, size_t stride, int32_t x, int32_t y) {
+    p += y * stride;
+    x *= 2;
+    float2 r = {p[x], p[x+1]};
+    return r;
+}
+
+static inline float3 getElementAt3(const uint8_t *p, size_t stride, int32_t x, int32_t y) {
+    p += y * stride;
+    x *= 4;
+    float3 r = {p[x], p[x+1], p[x+2]};
+    return r;
+}
+
+static inline float4 getElementAt4(const uint8_t *p, size_t stride, int32_t x, int32_t y) {
+    p += y * stride;
+    x *= 4;
+    float4 r = {p[x], p[x+1], p[x+2], p[x+3]};
+    return r;
+}
+
+static inline float3 getElementAt565(const uint8_t *p, size_t stride, int32_t x, int32_t y) {
+    p += y * stride;
+    x *= 2;
+    float3 r = getFrom565(((const uint16_t *)p)[0]);
+    return r;
+}
+
+
+
+
+
+static float4 LOCAL_CALL
+            getSample1D_A(const uint8_t *p, int32_t iPixel,
+                          int32_t next, float w0, float w1) {
+    float p0 = getElementAt1(p, iPixel);
+    float p1 = getElementAt1(p, next);
+    float r = p0 * w0 + p1 * w1;
+    r *= (1.f / 255.f);
+    float4 ret = {0.f, 0.f, 0.f, r};
+    return ret;
+}
+static float4 LOCAL_CALL
+            getSample1D_L(const uint8_t *p, int32_t iPixel,
+                          int32_t next, float w0, float w1) {
+    float p0 = getElementAt1(p, iPixel);
+    float p1 = getElementAt1(p, next);
+    float r = p0 * w0 + p1 * w1;
+    r *= (1.f / 255.f);
+    float4 ret = {r, r, r, 1.f};
+    return ret;
+}
+static float4 LOCAL_CALL
+            getSample1D_LA(const uint8_t *p, int32_t iPixel,
+                           int32_t next, float w0, float w1) {
+    float2 p0 = getElementAt2(p, iPixel);
+    float2 p1 = getElementAt2(p, next);
+    float2 r = p0 * w0 + p1 * w1;
+    r *= (1.f / 255.f);
+    float4 ret = {r.x, r.x, r.x, r.y};
+    return ret;
+}
+static float4 LOCAL_CALL
+            getSample1D_RGB(const uint8_t *p, int32_t iPixel,
+                            int32_t next, float w0, float w1) {
+    float3 p0 = getElementAt3(p, iPixel);
+    float3 p1 = getElementAt3(p, next);
+    float3 r = p0 * w0 + p1 * w1;
+    r *= (1.f / 255.f);
+    float4 ret = {r.x, r.x, r.z, 1.f};
+    return ret;
+}
+static float4 LOCAL_CALL
+            getSample1D_565(const uint8_t *p, int32_t iPixel,
+                           int32_t next, float w0, float w1) {
+    float3 p0 = getElementAt565(p, iPixel);
+    float3 p1 = getElementAt565(p, next);
+    float3 r = p0 * w0 + p1 * w1;
+    r *= (1.f / 255.f);
+    float4 ret = {r.x, r.x, r.z, 1.f};
+    return ret;
+}
+static float4 LOCAL_CALL
+            getSample1D_RGBA(const uint8_t *p, int32_t iPixel,
+                             int32_t next, float w0, float w1) {
+    float4 p0 = getElementAt4(p, iPixel);
+    float4 p1 = getElementAt4(p, next);
+    float4 r = p0 * w0 + p1 * w1;
+    r *= (1.f / 255.f);
+    return r;
+}
+
+
+static float4 LOCAL_CALL
+            getSample2D_A(const uint8_t *p, size_t stride,
+                          int locX, int locY, int nextX, int nextY,
+                          float w0, float w1, float w2, float w3) {
+    float p0 = getElementAt1(p, stride, locX, locY);
+    float p1 = getElementAt1(p, stride, nextX, locY);
+    float p2 = getElementAt1(p, stride, locX, nextY);
+    float p3 = getElementAt1(p, stride, nextX, nextY);
+    float r = p0 * w0 + p1 * w1 + p2 * w2 + p3 * w3;
+    r *= (1.f / 255.f);
+    float4 ret = {0.f, 0.f, 0.f, r};
+    return ret;
+}
+static float4 LOCAL_CALL
+            getSample2D_L(const uint8_t *p, size_t stride,
+                         int locX, int locY, int nextX, int nextY,
+                         float w0, float w1, float w2, float w3) {
+    float p0 = getElementAt1(p, stride, locX, locY);
+    float p1 = getElementAt1(p, stride, nextX, locY);
+    float p2 = getElementAt1(p, stride, locX, nextY);
+    float p3 = getElementAt1(p, stride, nextX, nextY);
+    float r = p0 * w0 + p1 * w1 + p2 * w2 + p3 * w3;
+    r *= (1.f / 255.f);
+    float4 ret = {r, r, r, 1.f};
+    return ret;
+}
+static float4 LOCAL_CALL
+            getSample2D_LA(const uint8_t *p, size_t stride,
+                         int locX, int locY, int nextX, int nextY,
+                         float w0, float w1, float w2, float w3) {
+    float2 p0 = getElementAt2(p, stride, locX, locY);
+    float2 p1 = getElementAt2(p, stride, nextX, locY);
+    float2 p2 = getElementAt2(p, stride, locX, nextY);
+    float2 p3 = getElementAt2(p, stride, nextX, nextY);
+    float2 r = p0 * w0 + p1 * w1 + p2 * w2 + p3 * w3;
+    r *= (1.f / 255.f);
+    float4 ret = {r.x, r.x, r.x, r.y};
+    return ret;
+}
+static float4 LOCAL_CALL
+            getSample2D_RGB(const uint8_t *p, size_t stride,
+                         int locX, int locY, int nextX, int nextY,
+                         float w0, float w1, float w2, float w3) {
+    float4 p0 = getElementAt4(p, stride, locX, locY);
+    float4 p1 = getElementAt4(p, stride, nextX, locY);
+    float4 p2 = getElementAt4(p, stride, locX, nextY);
+    float4 p3 = getElementAt4(p, stride, nextX, nextY);
+    float4 r = p0 * w0 + p1 * w1 + p2 * w2 + p3 * w3;
+    r *= (1.f / 255.f);
+    float4 ret = {r.x, r.y, r.z, 1.f};
+    return ret;
+}
+static float4 LOCAL_CALL
+            getSample2D_RGBA(const uint8_t *p, size_t stride,
+                         int locX, int locY, int nextX, int nextY,
+                         float w0, float w1, float w2, float w3) {
+    float4 p0 = getElementAt4(p, stride, locX, locY);
+    float4 p1 = getElementAt4(p, stride, nextX, locY);
+    float4 p2 = getElementAt4(p, stride, locX, nextY);
+    float4 p3 = getElementAt4(p, stride, nextX, nextY);
+    float4 r = p0 * w0 + p1 * w1 + p2 * w2 + p3 * w3;
+    r *= (1.f / 255.f);
+    return r;
+}
+static float4 getSample2D_565(const uint8_t *p, size_t stride,
+                         int locX, int locY, int nextX, int nextY,
+                         float w0, float w1, float w2, float w3) {
+    float3 p0 = getElementAt565(p, stride, locX, locY);
+    float3 p1 = getElementAt565(p, stride, nextX, locY);
+    float3 p2 = getElementAt565(p, stride, locX, nextY);
+    float3 p3 = getElementAt565(p, stride, nextX, nextY);
+    float3 r = p0 * w0 + p1 * w1 + p2 * w2 + p3 * w3;
+    r *= (1.f / 255.f);
+    float4 ret = {r.x, r.y, r.z, 1.f};
+    return ret;
+}
+
+
+extern "C" {
+    typedef float4 Sampler2DFn(const uint8_t *p, size_t stride,
+                               int lx, int ly, int nx, int ny,
+                               float w0, float w1, float w2, float w3) LOCAL_CALL;
+
+    Sampler2DFn rsdCpuGetSample2D_L_k;
+    Sampler2DFn rsdCpuGetSample2D_A_k;
+    Sampler2DFn rsdCpuGetSample2D_LA_k;
+    Sampler2DFn rsdCpuGetSample2D_RGB_k;
+    Sampler2DFn rsdCpuGetSample2D_RGBA_k;
+}
+
+#if 0
+static Sampler2DFn* GetBilinearSampleTable2D[] = {
+    0, 0, 0, 0, 0, 0, 0,
+    0,//rsdCpuGetSample2D_L_k,
+    0,//rsdCpuGetSample2D_A_k,
+    0,//rsdCpuGetSample2D_LA_k,
+    0,//rsdCpuGetSample2D_RGB_k,
+    rsdCpuGetSample2D_RGBA_k
+};
+
+#else
+static Sampler2DFn* GetBilinearSampleTable2D[] = {
+    0, 0, 0, 0, 0, 0, 0,
+    &getSample2D_L,
+    &getSample2D_A,
+    &getSample2D_LA,
+    &getSample2D_RGB,
+    &getSample2D_RGBA,
+};
+#endif
+
+
+static int applyWrapMode(RsSamplerValue mode, int coord, int size) {
+    switch (mode) {
+    case RS_SAMPLER_WRAP:
+        coord = coord % size;
+        if (coord < 0) {
+            coord += size;
+        }
+        break;
+
+    case RS_SAMPLER_CLAMP:
+        coord = rsMax(0, rsMin(coord, size - 1));
+        break;
+
+    case RS_SAMPLER_MIRRORED_REPEAT:
+        coord = coord % (size * 2);
+        if (coord < 0) {
+            coord = (size * 2) + coord;
+        }
+        if (coord >= size) {
+            coord = (size * 2) - coord;
+        }
+        break;
+
+    default:
+        coord = 0;
+        rsAssert(0);
+    }
+    return coord;
+}
+
+static float4
+        sample_LOD_LinearPixel(Allocation *a, const Type *type,
+                               RsDataKind dk, RsDataType dt,
+                               Sampler *s,
+                               float uv, int32_t lod) {
+    RsSamplerValue wrapS = s->mHal.state.wrapS;
+    int32_t sourceW = type->mHal.state.lodDimX[lod];
+    float pixelUV = uv * (float)(sourceW);
+    int32_t iPixel = (int32_t)(pixelUV);
+    float frac = pixelUV - (float)iPixel;
+
+    if (frac < 0.5f) {
+        iPixel -= 1;
+        frac += 0.5f;
+    } else {
+        frac -= 0.5f;
+    }
+
+    float oneMinusFrac = 1.0f - frac;
+
+    int32_t next = applyWrapMode(wrapS, iPixel + 1, sourceW);
+    int32_t loc = applyWrapMode(wrapS, iPixel, sourceW);
+
+    const uint8_t *ptr = (const uint8_t *)a->mHal.drvState.lod[lod].mallocPtr;
+
+    if (dt == RS_TYPE_UNSIGNED_5_6_5) {
+        return getSample1D_565(ptr, loc, next, next, frac);
+    }
+
+    switch(dk) {
+    case RS_KIND_PIXEL_L:
+        return getSample1D_L(ptr, loc, next, next, frac);
+    case RS_KIND_PIXEL_A:
+        return getSample1D_A(ptr, loc, next, next, frac);
+    case RS_KIND_PIXEL_LA:
+        return getSample1D_LA(ptr, loc, next, next, frac);
+    case RS_KIND_PIXEL_RGB:
+        return getSample1D_RGB(ptr, loc, next, next, frac);
+    case RS_KIND_PIXEL_RGBA:
+        return getSample1D_RGBA(ptr, loc, next, next, frac);
+
+    case RS_KIND_PIXEL_YUV:
+    case RS_KIND_USER:
+    case RS_KIND_INVALID:
+    case RS_KIND_PIXEL_DEPTH:
+        rsAssert(0);
+        break;
+    }
+
+    return 0.f;
+}
+
+static float4
+        sample_LOD_NearestPixel(Allocation *a, const Type *type,
+                                RsDataKind dk, RsDataType dt,
+                                Sampler *s, float uv, int32_t lod) {
+    RsSamplerValue wrapS = s->mHal.state.wrapS;
+    int32_t sourceW = type->mHal.state.lodDimX[lod];
+    int32_t iPixel = (int32_t)(uv * (float)(sourceW));
+    int32_t location = applyWrapMode(wrapS, iPixel, sourceW);
+
+
+    const uint8_t *ptr = (const uint8_t *)a->mHal.drvState.lod[lod].mallocPtr;
+
+    float4 result = {0.f, 0.f, 0.f, 1.f};
+    if (dt == RS_TYPE_UNSIGNED_5_6_5) {
+        result.xyz = getElementAt565(ptr, iPixel);
+       return result;
+    }
+
+    switch(dk) {
+    case RS_KIND_PIXEL_L:
+        {
+            float t = getElementAt1(ptr, iPixel);
+            result.xyz = t;
+        }
+        break;
+    case RS_KIND_PIXEL_A:
+        result.w = getElementAt1(ptr, iPixel);
+        break;
+    case RS_KIND_PIXEL_LA:
+        {
+            float2 t = getElementAt2(ptr, iPixel);
+            result.xyz = t.x;
+            result.w = t.y;
+        }
+        break;
+    case RS_KIND_PIXEL_RGB:
+        result.xyz = getElementAt3(ptr, iPixel);
+        break;
+    case RS_KIND_PIXEL_RGBA:
+        result = getElementAt4(ptr, iPixel);
+        break;
+
+    case RS_KIND_PIXEL_YUV:
+    case RS_KIND_USER:
+    case RS_KIND_INVALID:
+    case RS_KIND_PIXEL_DEPTH:
+        rsAssert(0);
+        break;
+    }
+
+    return result * (1.f / 255.f);
+}
+
+
+static float4
+        sample_LOD_LinearPixel(Allocation *a, const Type *type,
+                               RsDataKind dk, RsDataType dt,
+                               Sampler *s, float u, float v, int32_t lod) {
+    const RsSamplerValue wrapS = s->mHal.state.wrapS;
+    const RsSamplerValue wrapT = s->mHal.state.wrapT;
+    const int sourceW = type->mHal.state.lodDimX[lod];
+    const int sourceH = type->mHal.state.lodDimY[lod];
+
+    float pixelU = u * (float)sourceW;
+    float pixelV = v * (float)sourceH;
+    int iPixelU = (int)pixelU;
+    int iPixelV = (int)pixelV;
+
+    float fracU = pixelU - iPixelU;
+    float fracV = pixelV - iPixelV;
+
+    if (fracU < 0.5f) {
+        iPixelU -= 1;
+        fracU += 0.5f;
+    } else {
+        fracU -= 0.5f;
+    }
+    if (fracV < 0.5f) {
+        iPixelV -= 1;
+        fracV += 0.5f;
+    } else {
+        fracV -= 0.5f;
+    }
+    float oneMinusFracU = 1.0f - fracU;
+    float oneMinusFracV = 1.0f - fracV;
+
+    float w1 = oneMinusFracU * oneMinusFracV;
+    float w2 = fracU * oneMinusFracV;
+    float w3 = oneMinusFracU * fracV;
+    float w4 = fracU * fracV;
+
+    int nextX = applyWrapMode(wrapS, iPixelU + 1, sourceW);
+    int nextY = applyWrapMode(wrapT, iPixelV + 1, sourceH);
+    int locX = applyWrapMode(wrapS, iPixelU, sourceW);
+    int locY = applyWrapMode(wrapT, iPixelV, sourceH);
+
+    const uint8_t *ptr = (const uint8_t *)a->mHal.drvState.lod[lod].mallocPtr;
+    size_t stride = a->mHal.drvState.lod[lod].stride;
+
+    if (dt == RS_TYPE_UNSIGNED_5_6_5) {
+        return getSample2D_565(ptr, stride, locX, locY, nextX, nextY, w1, w2, w3, w4);
+    }
+
+    return GetBilinearSampleTable2D[dk](ptr, stride, locX, locY, nextX, nextY, w1, w2, w3, w4);
+}
+
+static float4
+        sample_LOD_NearestPixel(Allocation *a, const Type *type,
+                                RsDataKind dk, RsDataType dt,
+                                Sampler *s,
+                                float u, float v, int32_t lod) {
+    RsSamplerValue wrapS = s->mHal.state.wrapS;
+    RsSamplerValue wrapT = s->mHal.state.wrapT;
+
+    int32_t sourceW = type->mHal.state.lodDimX[lod];
+    int32_t sourceH = type->mHal.state.lodDimY[lod];
+
+    int locX = applyWrapMode(wrapS, u * sourceW, sourceW);
+    int locY = applyWrapMode(wrapT, v * sourceH, sourceH);
+
+
+    const uint8_t *ptr = (const uint8_t *)a->mHal.drvState.lod[lod].mallocPtr;
+    size_t stride = a->mHal.drvState.lod[lod].stride;
+
+    float4 result = {0.f, 0.f, 0.f, 1.f};
+    if (dt == RS_TYPE_UNSIGNED_5_6_5) {
+        result.xyz = getElementAt565(ptr, stride, locX, locY);
+       return result;
+    }
+
+    switch(dk) {
+    case RS_KIND_PIXEL_L:
+        {
+            float t = getElementAt1(ptr, stride, locX, locY);
+            result.xyz = t;
+        }
+        break;
+    case RS_KIND_PIXEL_A:
+        result.w = getElementAt1(ptr, stride, locX, locY);
+        break;
+    case RS_KIND_PIXEL_LA:
+        {
+            float2 t = getElementAt2(ptr, stride, locX, locY);
+            result.xyz = t.x;
+            result.w = t.y;
+        }
+        break;
+    case RS_KIND_PIXEL_RGB:
+        result.xyz = getElementAt3(ptr, stride, locX, locY);
+        break;
+    case RS_KIND_PIXEL_RGBA:
+        result = getElementAt4(ptr, stride, locX, locY);
+        break;
+
+
+    case RS_KIND_PIXEL_YUV:
+    case RS_KIND_USER:
+    case RS_KIND_INVALID:
+    case RS_KIND_PIXEL_DEPTH:
+        rsAssert(0);
+        break;
+    }
+
+    return result * (1.f / 255.f);
+}
+
+
+
+static float4 GenericSample1D(Allocation *a, Sampler *s, float u, float lod) {
+    const Type *type = a->getType();
+    const Element *elem = type->getElement();
+    const RsDataKind dk = elem->getKind();
+    const RsDataType dt = elem->getType();
+
+    if (dk == RS_KIND_USER || (dt != RS_TYPE_UNSIGNED_8 && dt != RS_TYPE_UNSIGNED_5_6_5)) {
+        return 0.f;
+    }
+
+    if (!(a->mHal.state.usageFlags & RS_ALLOCATION_USAGE_GRAPHICS_TEXTURE)) {
+        const Context *rsc = RsdCpuReference::getTlsContext();
+        rsc->setError(RS_ERROR_BAD_VALUE, "Sampling from texture witout USAGE_GRAPHICS_TEXTURE.");
+        return 0.f;
+    }
+
+    if (lod <= 0.0f) {
+        if (s->mHal.state.magFilter == RS_SAMPLER_NEAREST) {
+            return sample_LOD_NearestPixel(a, type, dk, dt, s, u, 0);
+        }
+        return sample_LOD_LinearPixel(a, type, dk, dt, s, u, 0);
+    }
+
+    if (s->mHal.state.minFilter == RS_SAMPLER_LINEAR_MIP_NEAREST) {
+        int32_t maxLOD = type->mHal.state.lodCount - 1;
+        lod = rsMin(lod, (float)maxLOD);
+        int32_t nearestLOD = (int32_t)round(lod);
+        return sample_LOD_LinearPixel(a, type, dk, dt, s, u, nearestLOD);
+    }
+
+    if (s->mHal.state.minFilter == RS_SAMPLER_LINEAR_MIP_LINEAR) {
+        int32_t lod0 = (int32_t)floor(lod);
+        int32_t lod1 = (int32_t)ceil(lod);
+        int32_t maxLOD = type->mHal.state.lodCount - 1;
+        lod0 = rsMin(lod0, maxLOD);
+        lod1 = rsMin(lod1, maxLOD);
+        float4 sample0 = sample_LOD_LinearPixel(a, type, dk, dt, s, u, lod0);
+        float4 sample1 = sample_LOD_LinearPixel(a, type, dk, dt, s, u, lod1);
+        float frac = lod - (float)lod0;
+        return sample0 * (1.0f - frac) + sample1 * frac;
+    }
+
+    return sample_LOD_NearestPixel(a, type, dk, dt, s, u, 0);
+}
+
+static float4 GenericSample2D(Allocation *a, Sampler *s, float u, float v, float lod) {
+    const Type *type = a->getType();
+    const Element *elem = type->getElement();
+    const RsDataKind dk = elem->getKind();
+    const RsDataType dt = elem->getType();
+
+    if (dk == RS_KIND_USER || (dt != RS_TYPE_UNSIGNED_8 && dt != RS_TYPE_UNSIGNED_5_6_5)) {
+        return 0.f;
+    }
+
+    if (!(a->mHal.state.usageFlags & RS_ALLOCATION_USAGE_GRAPHICS_TEXTURE)) {
+        const Context *rsc = RsdCpuReference::getTlsContext();
+        rsc->setError(RS_ERROR_BAD_VALUE, "Sampling from texture witout USAGE_GRAPHICS_TEXTURE.");
+        return 0.f;
+    }
+
+    if (lod <= 0.0f) {
+        if (s->mHal.state.magFilter == RS_SAMPLER_NEAREST) {
+            return sample_LOD_NearestPixel(a, type, dk, dt, s, u, v, 0);
+        }
+        return sample_LOD_LinearPixel(a, type, dk, dt, s, u, v, 0);
+    }
+
+    if (s->mHal.state.minFilter == RS_SAMPLER_LINEAR_MIP_NEAREST) {
+        int32_t maxLOD = type->mHal.state.lodCount - 1;
+        lod = rsMin(lod, (float)maxLOD);
+        int32_t nearestLOD = (int32_t)round(lod);
+        return sample_LOD_LinearPixel(a, type, dk, dt, s, u, v, nearestLOD);
+    }
+
+    if (s->mHal.state.minFilter == RS_SAMPLER_LINEAR_MIP_LINEAR) {
+        int32_t lod0 = (int32_t)floor(lod);
+        int32_t lod1 = (int32_t)ceil(lod);
+        int32_t maxLOD = type->mHal.state.lodCount - 1;
+        lod0 = rsMin(lod0, maxLOD);
+        lod1 = rsMin(lod1, maxLOD);
+        float4 sample0 = sample_LOD_LinearPixel(a, type, dk, dt, s, u, v, lod0);
+        float4 sample1 = sample_LOD_LinearPixel(a, type, dk, dt, s, u, v, lod1);
+        float frac = lod - (float)lod0;
+        return sample0 * (1.0f - frac) + sample1 * frac;
+    }
+
+    return sample_LOD_NearestPixel(a, type, dk, dt, s, u, v, 0);
+}
+
+
+
+
+// Must match pixel kind in rsDefines.h
+static void * NearestWrap[] = {
+    (void *) GenericSample1D,                // L,
+    (void *) GenericSample1D,                // A,
+    (void *) GenericSample1D,                // LA,
+    (void *) GenericSample1D,                // RGB,
+    (void *) GenericSample1D,                // RGBA,
+    0,
+    (void *) GenericSample1D,                // YUV
+
+    (void *) GenericSample2D,                // L,
+    (void *) GenericSample2D,                // A,
+    (void *) GenericSample2D,                // LA,
+    (void *) GenericSample2D,                // RGB,
+    (void *) GenericSample2D,                // RGBA,
+    0,
+    (void *) GenericSample2D,                // YUV
+};
+
+static void * NearestClamp[] = {
+    (void *) GenericSample1D,                // L,
+    (void *) GenericSample1D,                // A,
+    (void *) GenericSample1D,                // LA,
+    (void *) GenericSample1D,                // RGB,
+    (void *) GenericSample1D,                // RGBA,
+    0,
+    (void *) GenericSample1D,                // YUV
+
+    (void *) GenericSample2D,                // L,
+    (void *) GenericSample2D,                // A,
+    (void *) GenericSample2D,                // LA,
+    (void *) GenericSample2D,                // RGB,
+    (void *) GenericSample2D,                // RGBA,
+    0,
+    (void *) GenericSample2D,                // YUV
+};
+
+static void * NearestMirroredRepeat[] = {
+    (void *) GenericSample1D,                // L,
+    (void *) GenericSample1D,                // A,
+    (void *) GenericSample1D,                // LA,
+    (void *) GenericSample1D,                // RGB,
+    (void *) GenericSample1D,                // RGBA,
+    0,
+    (void *) GenericSample1D,                // YUV
+
+    (void *) GenericSample2D,                // L,
+    (void *) GenericSample2D,                // A,
+    (void *) GenericSample2D,                // LA,
+    (void *) GenericSample2D,                // RGB,
+    (void *) GenericSample2D,                // RGBA,
+    0,
+    (void *) GenericSample2D,                // YUV
+};
+
+// Must match pixel kind in rsDefines.h
+static void * LinearWrap[] = {
+    (void *) GenericSample1D,                // L,
+    (void *) GenericSample1D,                // A,
+    (void *) GenericSample1D,                // LA,
+    (void *) GenericSample1D,                // RGB,
+    (void *) GenericSample1D,                // RGBA,
+    0,
+    (void *) GenericSample1D,                // YUV
+
+    (void *) GenericSample2D,                // L,
+    (void *) GenericSample2D,                // A,
+    (void *) GenericSample2D,                // LA,
+    (void *) GenericSample2D,                // RGB,
+    (void *) GenericSample2D,                // RGBA,
+    0,
+    (void *) GenericSample2D,                // YUV
+};
+
+// Must match pixel kind in rsDefines.h
+static void * LinearClamp[] = {
+    (void *) GenericSample1D,                // L,
+    (void *) GenericSample1D,                // A,
+    (void *) GenericSample1D,                // LA,
+    (void *) GenericSample1D,                // RGB,
+    (void *) GenericSample1D,                // RGBA,
+    0,
+    (void *) GenericSample1D,                // YUV
+
+    (void *) GenericSample2D,                // L,
+    (void *) GenericSample2D,                // A,
+    (void *) GenericSample2D,                // LA,
+    (void *) GenericSample2D,                // RGB,
+    (void *) GenericSample2D,                // RGBA,
+    0,
+    (void *) GenericSample2D,                // YUV
+};
+
+// Must match pixel kind in rsDefines.h
+static void * LinearMirroredRepeat[] = {
+    (void *) GenericSample1D,                // L,
+    (void *) GenericSample1D,                // A,
+    (void *) GenericSample1D,                // LA,
+    (void *) GenericSample1D,                // RGB,
+    (void *) GenericSample1D,                // RGBA,
+    0,
+    (void *) GenericSample1D,                // YUV
+
+    (void *) GenericSample2D,                // L,
+    (void *) GenericSample2D,                // A,
+    (void *) GenericSample2D,                // LA,
+    (void *) GenericSample2D,                // RGB,
+    (void *) GenericSample2D,                // RGBA,
+    0,
+    (void *) GenericSample2D,                // YUV
+};
+
+// Must match pixel kind in rsDefines.h
+static void * Generic[] = {
+    (void *) GenericSample1D,                // L,
+    (void *) GenericSample1D,                // A,
+    (void *) GenericSample1D,                // LA,
+    (void *) GenericSample1D,                // RGB,
+    (void *) GenericSample1D,                // RGBA,
+    0,
+    (void *) GenericSample1D,                // YUV
+
+    (void *) GenericSample2D,                // L,
+    (void *) GenericSample2D,                // A,
+    (void *) GenericSample2D,                // LA,
+    (void *) GenericSample2D,                // RGB,
+    (void *) GenericSample2D,                // RGBA,
+    0,
+    (void *) GenericSample2D,                // YUV
+};
+
+bool rsdSamplerInit(const Context *, const Sampler *s) {
+    s->mHal.drv = Generic;
+
+    if ((s->mHal.state.minFilter == s->mHal.state.magFilter) &&
+        (s->mHal.state.wrapS == s->mHal.state.wrapT)) {
+        // We have fast paths for these.
+
+        switch(s->mHal.state.minFilter) {
+        case RS_SAMPLER_NEAREST:
+            switch(s->mHal.state.wrapS) {
+            case RS_SAMPLER_WRAP:
+                s->mHal.drv = NearestWrap;
+                break;
+            case RS_SAMPLER_CLAMP:
+                s->mHal.drv = NearestClamp;
+                break;
+            case RS_SAMPLER_MIRRORED_REPEAT:
+                s->mHal.drv = NearestMirroredRepeat;
+                break;
+            default:
+                break;
+            }
+            break;
+        case RS_SAMPLER_LINEAR:
+            switch(s->mHal.state.wrapS) {
+            case RS_SAMPLER_WRAP:
+                s->mHal.drv = LinearWrap;
+                break;
+            case RS_SAMPLER_CLAMP:
+                s->mHal.drv = LinearClamp;
+                break;
+            case RS_SAMPLER_MIRRORED_REPEAT:
+                s->mHal.drv = LinearMirroredRepeat;
+                break;
+            default:
+                break;
+            }
+            break;
+        case RS_SAMPLER_LINEAR_MIP_LINEAR:
+            switch(s->mHal.state.wrapS) {
+            case RS_SAMPLER_WRAP:
+                s->mHal.drv = LinearWrap;
+                break;
+            case RS_SAMPLER_CLAMP:
+                s->mHal.drv = LinearClamp;
+                break;
+            case RS_SAMPLER_MIRRORED_REPEAT:
+                s->mHal.drv = LinearMirroredRepeat;
+                break;
+            default:
+                break;
+            }
+            break;
+        default:
+            rsAssert(0);
+            break;
+        }
+
+    }
+
     return true;
 }