diff options
Diffstat (limited to '3rdparty/bimg/3rdparty/iqa/source/math_utils.c')
-rw-r--r-- | 3rdparty/bimg/3rdparty/iqa/source/math_utils.c | 82 |
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 new file mode 100644 index 00000000000..83f923d7673 --- /dev/null +++ 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; +} + |