chore: import upstream snapshot with attribution

modules/imgcodecs/test/test_bmp.cpp

@@ -0,0 +1,61 @@
+// This file is part of OpenCV project.
+// It is subject to the license terms in the LICENSE file found in the top-level directory
+// of this distribution and at http://opencv.org/license.html
+#include "test_precomp.hpp"
+#include "test_common.hpp"
+
+#include <vector>
+
+namespace opencv_test { namespace {
+
+// See https://github.com/opencv/opencv/issues/27789
+// See https://github.com/opencv/opencv/issues/23233
+TEST(Imgcodecs_BMP, encode_decode_over1GB_regression27789)
+{
+    applyTestTag( CV_TEST_TAG_MEMORY_2GB, CV_TEST_TAG_LONG );
+
+    // Create large Mat over 1GB
+    // 20000 px * 18000 px *  24 bpp(3ch) = 1,080,000,000 bytes
+    // 1 GiB                              = 1,073,741,824 bytes
+    cv::Mat src(20000, 18000, CV_8UC3, cv::Scalar(0,0,0));
+
+    // Encode large BMP file.
+    std::vector<uint8_t> buf;
+    bool ret = false;
+    ASSERT_NO_THROW(ret = cv::imencode(".bmp", src, buf, {}));
+    ASSERT_TRUE(ret);
+
+    src.release(); // To reduce usage memory, it is needed.
+
+    // Decode large BMP file.
+    cv::Mat dst;
+    ASSERT_NO_THROW(dst = cv::imdecode(buf, cv::IMREAD_COLOR));
+    ASSERT_FALSE(dst.empty());
+}
+
+TEST(Imgcodecs_BMP, write_read_over1GB_regression27789)
+{
+    // tag CV_TEST_TAG_VERYLONG applied to skip on CI. The test writes ~1GB file.
+    applyTestTag( CV_TEST_TAG_MEMORY_2GB, CV_TEST_TAG_VERYLONG );
+    string bmpFilename = cv::tempfile(".bmp"); // To remove it, test must use EXPECT_* instead of ASSERT_*.
+
+    // Create large Mat over 1GB
+    // 20000 px * 18000 px *  24 bpp(3ch) = 1,080,000,000 bytes
+    // 1 GiB                              = 1,073,741,824 bytes
+    cv::Mat src(20000, 18000, CV_8UC3, cv::Scalar(0,0,0));
+
+    // Write large BMP file.
+    bool ret = false;
+    EXPECT_NO_THROW(ret = cv::imwrite(bmpFilename, src, {}));
+    EXPECT_TRUE(ret);
+
+    // Read large BMP file.
+    cv::Mat dst;
+    EXPECT_NO_THROW(dst = cv::imread(bmpFilename, cv::IMREAD_COLOR));
+    EXPECT_FALSE(dst.empty());
+
+    remove(bmpFilename.c_str());
+}
+
+
+}} // namespace