1 files changed, 92 insertions, 0 deletions
diff --git a/java/tests/ImageProcessing_jb/src/com/android/rs/image/resize.rs b/java/tests/ImageProcessing_jb/src/com/android/rs/image/resize.rs
new file mode 100644
index 00000000..ec283bea
--- /dev/null
+++ b/java/tests/ImageProcessing_jb/src/com/android/rs/image/resize.rs
@@ -0,0 +1,92 @@
+/*
+ * Copyright (C) 2014 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 "ip.rsh"
+#pragma rs_fp_relaxed
+
+int32_t gWidthIn;
+int32_t gHeightIn;
+rs_allocation gIn;
+float scale;
+
+
+uchar4 __attribute__((kernel)) nearest(uint32_t x, uint32_t y) {
+    float xf = clamp(x * scale, 0.f, (float)gWidthIn - 1.f);
+    float yf = clamp(y * scale, 0.f, (float)gHeightIn - 1.f);
+    uint32_t ix = xf;
+    uint32_t iy = yf;
+
+    uchar4 tmp = rsGetElementAt_uchar4(gIn, ix, iy);
+    tmp.a = 0xff;
+    return tmp;
+}
+
+
+static float4 cubicInterpolate (float4 p0,float4 p1,float4 p2,float4 p3 , float x) {
+    return p1 + 0.5f * x * (p2 - p0 + x * (2.f * p0 - 5.f * p1 + 4.f * p2 - p3
+            + x * (3.f * (p1 - p2) + p3 - p0)));
+}
+
+uchar4 __attribute__((kernel)) bicubic(uint32_t x, uint32_t y) {
+    float xf = x * scale;
+    float yf = y * scale;
+
+    int startx = (int) floor(xf - 2);
+    int starty = (int) floor(yf - 2);
+    xf = xf - floor(xf);
+    yf = yf - floor(yf);
+    int maxx = gWidthIn - 1;
+    int maxy = gHeightIn - 1;
+
+    uint32_t xs0 = (uint32_t) max(0, startx + 0);
+    uint32_t xs1 = (uint32_t) max(0, startx + 1);
+    uint32_t xs2 = (uint32_t) min(maxx, startx + 2);
+    uint32_t xs3 = (uint32_t) min(maxx, startx + 3);
+
+    uint32_t ys0 = (uint32_t) max(0, starty + 0);
+    uint32_t ys1 = (uint32_t) max(0, starty + 1);
+    uint32_t ys2 = (uint32_t) min(maxy, starty + 2);
+    uint32_t ys3 = (uint32_t) min(maxy, starty + 3);
+
+    float4 p00 = convert_float4(rsGetElementAt_uchar4(gIn, xs0, ys0));
+    float4 p01 = convert_float4(rsGetElementAt_uchar4(gIn, xs1, ys0));
+    float4 p02 = convert_float4(rsGetElementAt_uchar4(gIn, xs2, ys0));
+    float4 p03 = convert_float4(rsGetElementAt_uchar4(gIn, xs3, ys0));
+    float4 p0  = cubicInterpolate(p00, p01, p02, p03, xf);
+
+    float4 p10 = convert_float4(rsGetElementAt_uchar4(gIn, xs0, ys1));
+    float4 p11 = convert_float4(rsGetElementAt_uchar4(gIn, xs1, ys1));
+    float4 p12 = convert_float4(rsGetElementAt_uchar4(gIn, xs2, ys1));
+    float4 p13 = convert_float4(rsGetElementAt_uchar4(gIn, xs3, ys1));
+    float4 p1  = cubicInterpolate(p10, p11, p12, p13, xf);
+
+    float4 p20 = convert_float4(rsGetElementAt_uchar4(gIn, xs0, ys2));
+    float4 p21 = convert_float4(rsGetElementAt_uchar4(gIn, xs1, ys2));
+    float4 p22 = convert_float4(rsGetElementAt_uchar4(gIn, xs2, ys2));
+    float4 p23 = convert_float4(rsGetElementAt_uchar4(gIn, xs3, ys2));
+    float4 p2  = cubicInterpolate(p20, p21, p22, p23, xf);
+
+    float4 p30 = convert_float4(rsGetElementAt_uchar4(gIn, xs0, ys3));
+    float4 p31 = convert_float4(rsGetElementAt_uchar4(gIn, xs1, ys3));
+    float4 p32 = convert_float4(rsGetElementAt_uchar4(gIn, xs2, ys3));
+    float4 p33 = convert_float4(rsGetElementAt_uchar4(gIn, xs3, ys3));
+    float4 p3  = cubicInterpolate(p30, p31, p32, p33, xf);
+
+    float4 p  = cubicInterpolate(p0, p1, p2, p3, yf);
+    p = clamp(p, 0.f, 255.f);
+    return convert_uchar4(p);
+}
+