From 6ff3b19ee6120edf015fad8caab2991faa3070af Mon Sep 17 00:00:00 2001 From: Anthony Barbier Date: Mon, 4 Sep 2017 18:44:23 +0100 Subject: COMPMID-344 Updated doxygen Change-Id: I32f7b84daa560e460b77216add529c8fa8b327ae --- src/core/CL/cl_kernels/scale.cl | 123 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 123 insertions(+) create mode 100644 src/core/CL/cl_kernels/scale.cl (limited to 'src/core/CL/cl_kernels/scale.cl') diff --git a/src/core/CL/cl_kernels/scale.cl b/src/core/CL/cl_kernels/scale.cl new file mode 100644 index 0000000000..9ef33b83ce --- /dev/null +++ b/src/core/CL/cl_kernels/scale.cl @@ -0,0 +1,123 @@ +/* + * Copyright (c) 2016, 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" + +/** Transforms four 2D coordinates. This is used to map the output coordinates to the input coordinates. + * + * @param[in] coord 2D coordinates to transform. + * @param[in] scale input/output scale ratio + * + * @return a float8 containing 4 2D transformed values in the input image. + */ +inline const float8 transform_nearest(const float2 coord, const float2 scale) +{ + const float4 in_x_coords = (float4)(coord.s0, 1 + coord.s0, 2 + coord.s0, 3 + coord.s0); + const float4 new_x = (in_x_coords + ((float4)(0.5f))) * (float4)(scale.s0); + const float4 new_y = (float4)((coord.s1 + 0.5f) * scale.s1); + return (float8)(new_x.s0, new_y.s0, new_x.s1, new_y.s1, new_x.s2, new_y.s2, new_x.s3, new_y.s3); +} + +/** Transforms four 2D coordinates. This is used to map the output coordinates to the input coordinates. + * + * @param[in] coord 2D coordinates to transform. + * @param[in] scale input/output scale ratio + * + * @return a float8 containing 4 2D transformed values in the input image. + */ +inline const float8 transform_bilinear(const float2 coord, const float2 scale) +{ + const float4 in_x_coords = (float4)(coord.s0, 1 + coord.s0, 2 + coord.s0, 3 + coord.s0); + const float4 new_x = (in_x_coords + ((float4)(0.5f))) * (float4)(scale.s0) - (float4)(0.5f); + const float4 new_y = (float4)((coord.s1 + 0.5f) * scale.s1 - 0.5f); + return (float8)(new_x.s0, new_y.s0, new_x.s1, new_y.s1, new_x.s2, new_y.s2, new_x.s3, new_y.s3); +} + +/** Performs an affine transformation on an image interpolating with the NEAREAST NEIGHBOUR method. Input and output are single channel U8 or S16. + * + * @param[in] in_ptr Pointer to the source image. Supported data types: U8, S16. + * @param[in] in_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] in_step_x src_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] in_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] in_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] in_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] out_ptr Pointer to the destination image. Supported data types: U8, S16. (Must be the same as the input) + * @param[in] out_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] out_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] out_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] out_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] out_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[in] input_width Input image width + * @param[in] input_height Input image height + * @param[in] output_width Output image width + * @param[in] output_height Output image height + */ +__kernel void scale_nearest_neighbour( + IMAGE_DECLARATION(in), + IMAGE_DECLARATION(out), + const float input_width, + const float input_height, + const float output_width, + const float output_height) +{ + Image in = CONVERT_TO_IMAGE_STRUCT_NO_STEP(in); + Image out = CONVERT_TO_IMAGE_STRUCT(out); + const float2 r = (float2)(input_width / output_width, input_height / output_height); + const float8 tc = clamp_to_border(transform_nearest(get_current_coords(), r), input_width, input_height); + vstore4(read_texels4(&in, convert_int8(tc)), 0, (__global DATA_TYPE *)out.ptr); +} + +/** Performs an affine transformation on an image interpolating with the BILINEAR method. + * + * @param[in] in_ptr Pointer to the source image. Supported data types: U8, S16. + * @param[in] in_stride_x Stride of the source image in X dimension (in bytes) + * @param[in] in_step_x src_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] in_stride_y Stride of the source image in Y dimension (in bytes) + * @param[in] in_step_y src_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] in_offset_first_element_in_bytes The offset of the first element in the source image + * @param[out] out_ptr Pointer to the destination image. Supported data types: U8, S16. (Must be the same as the input) + * @param[in] out_stride_x Stride of the destination image in X dimension (in bytes) + * @param[in] out_step_x dst_stride_x * number of elements along X processed per workitem(in bytes) + * @param[in] out_stride_y Stride of the destination image in Y dimension (in bytes) + * @param[in] out_step_y dst_stride_y * number of elements along Y processed per workitem(in bytes) + * @param[in] out_offset_first_element_in_bytes The offset of the first element in the destination image + * @param[in] input_width Input image width + * @param[in] input_height Input image height + * @param[in] output_width Output image width + * @param[in] output_height Output image height + */ +__kernel void scale_bilinear( + IMAGE_DECLARATION(in), + IMAGE_DECLARATION(out), + const float input_width, + const float input_height, + const float output_width, + const float output_height) +{ + Image in = CONVERT_TO_IMAGE_STRUCT_NO_STEP(in); + Image out = CONVERT_TO_IMAGE_STRUCT(out); + const float2 r = (float2)(input_width / output_width, input_height / output_height); + const float8 tc = clamp_to_border(transform_bilinear(get_current_coords(), r), input_width, input_height); + vstore4(bilinear_interpolate(&in, tc, input_width, input_height), 0, (__global DATA_TYPE *)out.ptr); +} -- cgit v1.2.1