COMPMID-424 Implemented reference implementation and tests for WarpAffine

Change-Id: I4924ab1de17adc3b880a5cc22f2497abbc8e221b
Reviewed-on: http://mpd-gerrit.cambridge.arm.com/85820
Tested-by: Kaizen <jeremy.johnson+kaizengerrit@arm.com>
Reviewed-by: Steven Niu <steven.niu@arm.com>
diff --git a/tests/validation/CL/WarpAffine.cpp b/tests/validation/CL/WarpAffine.cpp
new file mode 100644
index 0000000..9177fcb
--- /dev/null
+++ b/tests/validation/CL/WarpAffine.cpp
@@ -0,0 +1,120 @@
+/*
+ * Copyright (c) 2017 ARM Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#include "arm_compute/core/Types.h"
+#include "arm_compute/core/Utils.h"
+#include "arm_compute/runtime/CL/functions/CLWarpAffine.h"
+#include "arm_compute/runtime/Tensor.h"
+#include "arm_compute/runtime/TensorAllocator.h"
+#include "tests/AssetsLibrary.h"
+#include "tests/CL/CLAccessor.h"
+#include "tests/PaddingCalculator.h"
+#include "tests/datasets/BorderModeDataset.h"
+#include "tests/datasets/InterpolationPolicyDataset.h"
+#include "tests/datasets/ShapeDatasets.h"
+#include "tests/framework/Asserts.h"
+#include "tests/framework/Macros.h"
+#include "tests/framework/datasets/Datasets.h"
+#include "tests/validation/CPP/Utils.h"
+#include "tests/validation/Validation.h"
+#include "tests/validation/fixtures/WarpAffineFixture.h"
+
+namespace arm_compute
+{
+namespace test
+{
+namespace validation
+{
+namespace
+{
+/** Tolerance */
+constexpr AbsoluteTolerance<uint8_t> tolerance(1);
+} // namespace
+
+TEST_SUITE(CL)
+TEST_SUITE(WarpAffine)
+
+DATA_TEST_CASE(Configuration, framework::DatasetMode::ALL, combine(combine(combine(concat(datasets::SmallShapes(), datasets::LargeShapes()), framework::dataset::make("DataType", DataType::U8)),
+                                                                           framework::dataset::make("InterpolationPolicy", { InterpolationPolicy::NEAREST_NEIGHBOR, InterpolationPolicy::BILINEAR })),
+                                                                   datasets::BorderModes()),
+               shape, data_type, policy, border_mode)
+{
+    // Generate a random constant value if border_mode is constant
+    std::mt19937                           gen(library->seed());
+    std::uniform_int_distribution<uint8_t> distribution_u8(0, 255);
+    uint8_t                                constant_border_value = distribution_u8(gen);
+
+    // Create the matrix
+    std::array<float, 6> matrix{ {} };
+    fill_warp_matrix<6>(matrix, 3, 2);
+
+    // Create tensors
+    CLTensor src = create_tensor<CLTensor>(shape, data_type);
+    CLTensor dst = create_tensor<CLTensor>(shape, data_type);
+
+    ARM_COMPUTE_EXPECT(src.info()->is_resizable(), framework::LogLevel::ERRORS);
+    ARM_COMPUTE_EXPECT(dst.info()->is_resizable(), framework::LogLevel::ERRORS);
+
+    // Create and configure function
+    CLWarpAffine warp_affine;
+    warp_affine.configure(&src, &dst, matrix.data(), policy, border_mode, constant_border_value);
+
+    // Validate valid region
+    const ValidRegion valid_region = shape_to_valid_region(shape);
+
+    validate(src.info()->valid_region(), valid_region);
+    validate(dst.info()->valid_region(), valid_region);
+
+    // Validate padding
+    int               total_right  = ceil_to_multiple(shape[0], 4);
+    const int         access_right = total_right + (((total_right - shape[0]) == 0) ? 1 : 0);
+    const PaddingSize read_padding(1, access_right - shape[0], 1, 1);
+    validate(src.info()->padding(), read_padding);
+
+    PaddingCalculator calculator(shape.x(), 4);
+    validate(dst.info()->padding(), calculator.required_padding());
+}
+
+template <typename T>
+using CLWarpAffineFixture = WarpAffineValidationFixture<CLTensor, CLAccessor, CLWarpAffine, T>;
+
+FIXTURE_DATA_TEST_CASE(RunSmall, CLWarpAffineFixture<uint8_t>, framework::DatasetMode::PRECOMMIT, combine(combine(combine(datasets::SmallShapes(), framework::dataset::make("DataType", DataType::U8)),
+                                                                                                                  framework::dataset::make("InterpolationPolicy", { InterpolationPolicy::NEAREST_NEIGHBOR, InterpolationPolicy::BILINEAR })),
+                                                                                                          datasets::BorderModes()))
+{
+    // Validate output
+    validate(CLAccessor(_target), _reference, _valid_mask, tolerance, 0.02f);
+}
+FIXTURE_DATA_TEST_CASE(RunLarge, CLWarpAffineFixture<uint8_t>, framework::DatasetMode::NIGHTLY, combine(combine(combine(datasets::LargeShapes(), framework::dataset::make("DataType", DataType::U8)),
+                                                                                                                framework::dataset::make("InterpolationPolicy", { InterpolationPolicy::NEAREST_NEIGHBOR, InterpolationPolicy::BILINEAR })),
+                                                                                                        datasets::BorderModes()))
+{
+    // Validate output
+    validate(CLAccessor(_target), _reference, _valid_mask, tolerance, 0.02f);
+}
+
+TEST_SUITE_END()
+TEST_SUITE_END()
+} // namespace validation
+} // namespace test
+} // namespace arm_compute