/* * 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 "helpers.h" #include "warp_helpers.h" /** Performs a remapping of an input image to an output given two remapping image using nearest neighbor as interpolation. * * This kernel performs remapping with this method of pixel coordinate translation: * out(x,y) = in(mapx(x,y), mapy(x,y)); * * @param[in] in_ptr Pointer to the source image. Supported data types: U8. * @param[in] in_stride_x Stride of the source image in X dimension (in bytes) * @param[in] in_step_x in_stride_x * number of elements along X processed per work item (in bytes) * @param[in] in_stride_y Stride of the source image in Y dimension (in bytes) * @param[in] in_step_y in_stride_y * number of elements along Y processed per work item (in bytes) * @param[in] in_offset_first_element_in_bytes Offset of the first element in the source image * @param[out] out_ptr Pointer to the destination image. Supported data types: U8. * @param[in] out_stride_x Stride of the destination image in X dimension (in bytes) * @param[in] out_step_x out_stride_x * number of elements along X processed per work item (in bytes) * @param[in] out_stride_y Stride of the destination image in Y dimension (in bytes) * @param[in] out_step_y out_stride_y * number of elements along Y processed per work item (in bytes) * @param[in] out_offset_first_element_in_bytes Offset of the first element in the destination image * @param[in] mapx_ptr Pointer to the x remapping image. Supported data types: F32. * @param[in] mapx_stride_x Stride of the remapping image in X dimension (in bytes) * @param[in] mapx_step_x mapx_stride_x * number of elements along X processed per work item (in bytes) * @param[in] mapx_stride_y Stride of the remapping image in Y dimension (in bytes) * @param[in] mapx_step_y mapy_stride_y * number of elements along Y processed per work item (in bytes) * @param[in] mapx_offset_first_element_in_bytes Offset of the first element in the remapping image * @param[in] mapy_ptr Pointer to the x remapping image. Supported data types: F32. * @param[in] mapy_stride_x Stride of the remapping image in X dimension (in bytes) * @param[in] mapy_step_x mapy_stride_x * number of elements along X processed per work item (in bytes) * @param[in] mapy_stride_y Stride of the remapping image in Y dimension (in bytes) * @param[in] mapy_step_y mapy_stride_y * number of elements along Y processed per work item (in bytes) * @param[in] mapy_offset_first_element_in_bytes Offset of the first element in the remapping image * @param[in] width Width of the input image * @param[in] height Height of the input image */ __kernel void remap_nearest_neighbour( IMAGE_DECLARATION(in), IMAGE_DECLARATION(out), IMAGE_DECLARATION(mapx), IMAGE_DECLARATION(mapy), const float width, const float height) { Image in = CONVERT_TO_IMAGE_STRUCT_NO_STEP(in); Image out = CONVERT_TO_IMAGE_STRUCT(out); Image mapx = CONVERT_TO_IMAGE_STRUCT(mapx); Image mapy = CONVERT_TO_IMAGE_STRUCT(mapy); float4 mapx_coords = vload4(0, (__global float *)mapx.ptr); float4 mapy_coords = vload4(0, (__global float *)mapy.ptr); float8 map_coords = (float8)(mapx_coords.s0, mapy_coords.s0, mapx_coords.s1, mapy_coords.s1, mapx_coords.s2, mapy_coords.s2, mapx_coords.s3, mapy_coords.s3); map_coords += (float8)(0.5f); vstore4(read_texels4(&in, convert_int8(clamp_to_border(map_coords, width, height))), 0, out.ptr); } /** Performs a remapping of an input image to an output given two remapping image using bilinear as interpolation. * * This kernel performs remapping with this method of pixel coordinate translation: * out(x,y) = in(mapx(x,y), mapy(x,y)); * * @param[in] in_ptr Pointer to the source image. Supported data types: U8. * @param[in] in_stride_x Stride of the source image in X dimension (in bytes) * @param[in] in_step_x in_stride_x * number of elements along X processed per work item (in bytes) * @param[in] in_stride_y Stride of the source image in Y dimension (in bytes) * @param[in] in_step_y in_stride_y * number of elements along Y processed per work item (in bytes) * @param[in] in_offset_first_element_in_bytes Offset of the first element in the source image * @param[out] out_ptr Pointer to the destination image. Supported data types: U8. * @param[in] out_stride_x Stride of the destination image in X dimension (in bytes) * @param[in] out_step_x out_stride_x * number of elements along X processed per work item (in bytes) * @param[in] out_stride_y Stride of the destination image in Y dimension (in bytes) * @param[in] out_step_y out_stride_y * number of elements along Y processed per work item (in bytes) * @param[in] out_offset_first_element_in_bytes Offset of the first element in the destination image * @param[in] mapx_ptr Pointer to the x remapping image. Supported data types: F32. * @param[in] mapx_stride_x Stride of the remapping image in X dimension (in bytes) * @param[in] mapx_step_x mapx_stride_x * number of elements along X processed per work item (in bytes) * @param[in] mapx_stride_y Stride of the remapping image in Y dimension (in bytes) * @param[in] mapx_step_y mapy_stride_y * number of elements along Y processed per work item (in bytes) * @param[in] mapx_offset_first_element_in_bytes Offset of the first element in the remapping image * @param[in] mapy_ptr Pointer to the x remapping image. Supported data types: F32. * @param[in] mapy_stride_x Stride of the remapping image in X dimension (in bytes) * @param[in] mapy_step_x mapy_stride_x * number of elements along X processed per work item (in bytes) * @param[in] mapy_stride_y Stride of the remapping image in Y dimension (in bytes) * @param[in] mapy_step_y mapy_stride_y * number of elements along Y processed per work item (in bytes) * @param[in] mapy_offset_first_element_in_bytes Offset of the first element in the remapping image * @param[in] width Width of the input image * @param[in] height Height of the input image */ __kernel void remap_bilinear( IMAGE_DECLARATION(in), IMAGE_DECLARATION(out), IMAGE_DECLARATION(mapx), IMAGE_DECLARATION(mapy), const float width, const float height) { Image in = CONVERT_TO_IMAGE_STRUCT_NO_STEP(in); Image out = CONVERT_TO_IMAGE_STRUCT(out); Image mapx = CONVERT_TO_IMAGE_STRUCT(mapx); Image mapy = CONVERT_TO_IMAGE_STRUCT(mapy); float4 mapx_coords = vload4(0, (__global float *)mapx.ptr); float4 mapy_coords = vload4(0, (__global float *)mapy.ptr); float8 map_coords = (float8)(mapx_coords.s0, mapy_coords.s0, mapx_coords.s1, mapy_coords.s1, mapx_coords.s2, mapy_coords.s2, mapx_coords.s3, mapy_coords.s3); vstore4(bilinear_interpolate(&in, clamp_to_border(map_coords, width, height), width, height), 0, out.ptr); }