1 // This file is part of OpenCV project.
2 // It is subject to the license terms in the LICENSE file found in the top-level directory
3 // of this distribution and at http://opencv.org/license.html.
5 // Copyright (C) 2018-2019 Intel Corporation
8 #include "test_precomp.hpp"
13 TEST(GAPI, Mat_Create_NoLink)
17 m2.create(32, 32, CV_8U);
19 EXPECT_NE(m1.rows, m2.rows);
20 EXPECT_NE(m1.cols, m2.cols);
21 EXPECT_NE(m1.data, m2.data);
24 TEST(GAPI, Mat_Recreate)
26 cv::Mat m1 = cv::Mat::zeros(480, 640, CV_8U);
27 m1.at<uchar>(0, 0) = 128;
30 EXPECT_EQ(m1.rows, m2.rows);
31 EXPECT_EQ(m1.cols, m2.cols);
32 EXPECT_EQ(m1.data, m2.data);
33 EXPECT_EQ(m1.at<uchar>(0, 0), m2.at<uchar>(0, 0));
35 // Calling "create" with the same meta is NOOP - both m1 and m2 are the same
36 m1.create(480, 640, CV_8U);
37 EXPECT_EQ(m1.rows, m2.rows);
38 EXPECT_EQ(m1.cols, m2.cols);
39 EXPECT_EQ(m1.data, m2.data);
40 EXPECT_EQ(m1.at<uchar>(0, 0), m2.at<uchar>(0, 0));
42 // Calling "create" on m2 with different meta doesn't update original m1
43 // Now m1 and m2 are distinct
44 m2.create(720, 1280, CV_8U);
45 m2.at<uchar>(0, 0) = 64; // Initialize 0,0 element since m2 is a new buffer
46 EXPECT_NE(m1.rows, m2.rows);
47 EXPECT_NE(m1.cols, m2.cols);
48 EXPECT_NE(m1.data, m2.data);
49 EXPECT_NE(m1.at<uchar>(0, 0), m2.at<uchar>(0, 0));
51 // What if a Mat is created from handle?
57 cv::Mat m3(3, 3, CV_8U, data);
59 EXPECT_EQ(m3.rows, m4.rows);
60 EXPECT_EQ(m3.cols, m4.cols);
61 EXPECT_EQ(m3.data, m4.data);
62 EXPECT_EQ(data, m3.data);
63 EXPECT_EQ(data, m4.data);
64 EXPECT_EQ(m3.at<uchar>(0, 0), m4.at<uchar>(0, 0));
66 // cv::Mat::create must be NOOP if we don't change the meta,
67 // even if the origianl mat is created from handle.
68 m4.create(3, 3, CV_8U);
69 EXPECT_EQ(m3.rows, m4.rows);
70 EXPECT_EQ(m3.cols, m4.cols);
71 EXPECT_EQ(m3.data, m4.data);
72 EXPECT_EQ(data, m3.data);
73 EXPECT_EQ(data, m4.data);
74 EXPECT_EQ(m3.at<uchar>(0, 0), m4.at<uchar>(0, 0));
77 TEST(GAPI, EmptyOutMat)
79 cv::Mat in_mat = cv::Mat(480, 640, CV_8U, cv::Scalar(64));
81 cv::GComputation cc([]()
84 cv::GMat out = in + in;
85 return cv::GComputation(in, out);
89 cc.apply(in_mat, out);
91 EXPECT_EQ(640, out.cols);
92 EXPECT_EQ(480, out.rows);
93 EXPECT_EQ(CV_8U, out.type());
94 EXPECT_EQ(0, cv::countNonZero(out - (in_mat+in_mat)));