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-rw-r--r--3rdparty/bimg/3rdparty/iqa/source/math_utils.c82
1 files changed, 82 insertions, 0 deletions
diff --git a/3rdparty/bimg/3rdparty/iqa/source/math_utils.c b/3rdparty/bimg/3rdparty/iqa/source/math_utils.c
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index 00000000000..83f923d7673
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+++ b/3rdparty/bimg/3rdparty/iqa/source/math_utils.c
@@ -0,0 +1,82 @@
+/*
+ * Copyright (c) 2011, Tom Distler (http://tdistler.com)
+ * All rights reserved.
+ *
+ * The BSD License
+ *
+ * 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 the tdistler.com 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 HOLDER 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.
+ */
+
+#include "math_utils.h"
+#include <math.h>
+
+int _round(float a)
+{
+ int sign_a = a > 0.0f ? 1 : -1;
+ return a-(int)a >= 0.5 ? (int)a + sign_a : (int)a;
+}
+
+int _max(int x, int y)
+{
+ return x >= y ? x : y;
+}
+
+int _min(int x, int y)
+{
+ return x <= y ? x : y;
+}
+
+int _cmp_float(float a, float b, int digits)
+{
+ /* Round */
+ int sign_a = a > 0.0f ? 1 : -1;
+ int sign_b = b > 0.0f ? 1 : -1;
+ double scale = pow(10.0, (double)digits);
+ double ax = a * scale;
+ double bx = b * scale;
+ int ai = ax-(int)ax >= 0.5 ? (int)ax + sign_a : (int)ax;
+ int bi = bx-(int)bx >= 0.5 ? (int)bx + sign_b : (int)bx;
+
+ /* Compare */
+ return ai == bi ? 0 : 1;
+}
+
+int _matrix_cmp(const float *a, const float *b, int w, int h, int digits)
+{
+ int offset;
+ int result=0;
+ int len=w*h;
+ for (offset=0; offset<len; ++offset) {
+ if (_cmp_float(a[offset], b[offset], digits)) {
+ result = 1;
+ break;
+ }
+ }
+
+ return result;
+}
+