Initial commit.

examples/mandelbrot_tasks/mandelbrot_serial.cpp

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+/*
+  Copyright (c) 2010-2011, Intel Corporation
+  All rights reserved.
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions are
+  met:
+
+    * Redistributions of source code must retain the above copyright
+      notice, this list of conditions and the following disclaimer.
+
+    * Redistributions in binary form must reproduce the above copyright
+      notice, this list of conditions and the following disclaimer in the
+      documentation and/or other materials provided with the distribution.
+
+    * Neither the name of Intel Corporation nor the names of its
+      contributors may be used to endorse or promote products derived from
+      this software without specific prior written permission.
+
+
+   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
+   IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+   TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+   PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
+   OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+   EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+   PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+   PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+   LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+   NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+   SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
+*/
+
+
+static int mandel(float c_re, float c_im, int count) {
+    float z_re = c_re, z_im = c_im;
+    int i;
+    for (i = 0; i < count; ++i) {
+        if (z_re * z_re + z_im * z_im > 4.)
+            break;
+
+        float new_re = z_re*z_re - z_im*z_im;
+        float new_im = 2.f * z_re * z_im;
+        z_re = c_re + new_re;
+        z_im = c_im + new_im;
+    }
+
+    return i;
+}
+
+void mandelbrot_serial(float x0, float y0, float x1, float y1,
+                       int width, int height, int maxIterations,
+                       int output[])
+{
+    float dx = (x1 - x0) / width;
+    float dy = (y1 - y0) / height;
+
+    for (int j = 0; j < height; j++) {
+        for (int i = 0; i < width; ++i) {
+            float x = x0 + i * dx;
+            float y = y0 + j * dy;
+
+            int index = (j * width + i);
+            output[index] = mandel(x, y, maxIterations);
+        }
+    }
+}
+