documentation/scale_8cl_source.xhtml

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 119 <a href="scale_8cl.xhtml">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno">    1</span>&#160;<span class="comment">/*</span></div><div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * Copyright (c) 2016, 2017 ARM Limited.</span></div><div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * SPDX-License-Identifier: MIT</span></div><div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * Permission is hereby granted, free of charge, to any person obtaining a copy</span></div><div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * of this software and associated documentation files (the &quot;Software&quot;), to</span></div><div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> * deal in the Software without restriction, including without limitation the</span></div><div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or</span></div><div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> * sell copies of the Software, and to permit persons to whom the Software is</span></div><div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * furnished to do so, subject to the following conditions:</span></div><div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> * The above copyright notice and this permission notice shall be included in all</span></div><div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * copies or substantial portions of the Software.</span></div><div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> *</span></div><div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"> * THE SOFTWARE IS PROVIDED &quot;AS IS&quot;, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span></div><div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"> * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span></div><div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;<span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE</span></div><div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="comment"> * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span></div><div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,</span></div><div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="comment"> * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE</span></div><div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="comment"> * SOFTWARE.</span></div><div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment"> */</span></div><div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="helpers_8h.xhtml">helpers.h</a>&quot;</span></div><div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="warp__helpers_8h.xhtml">warp_helpers.h</a>&quot;</span></div><div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;</div><div class="line"><a name="l00034"></a><span class="lineno"><a class="line" href="scale_8cl.xhtml#a55c710b814464d9b8982c4eb6ca04dee">   34</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">const</span> float8 <a class="code" href="scale_8cl.xhtml#a55c710b814464d9b8982c4eb6ca04dee">transform_nearest</a>(<span class="keyword">const</span> float2 coord, <span class="keyword">const</span> float2 scale)</div><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;{</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    <span class="keyword">const</span> float4 in_x_coords = (float4)(coord.s0, 1 + coord.s0, 2 + coord.s0, 3 + coord.s0);</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    <span class="keyword">const</span> float4 new_x       = (in_x_coords + ((float4)(0.5f))) * (float4)(scale.s0);</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="keyword">const</span> float4 new_y       = (float4)((coord.s1 + 0.5f) * scale.s1);</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    <span class="keywordflow">return</span> (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);</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;}</div><div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;</div><div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="scale_8cl.xhtml#a1990e87858b15b8fce3f63965fb9b86c">   49</a></span>&#160;<span class="keyword">inline</span> <span class="keyword">const</span> float8 <a class="code" href="scale_8cl.xhtml#a1990e87858b15b8fce3f63965fb9b86c">transform_bilinear</a>(<span class="keyword">const</span> float2 coord, <span class="keyword">const</span> float2 scale)</div><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;{</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    <span class="keyword">const</span> float4 in_x_coords = (float4)(coord.s0, 1 + coord.s0, 2 + coord.s0, 3 + coord.s0);</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <span class="keyword">const</span> float4 new_x       = (in_x_coords + ((float4)(0.5f))) * (float4)(scale.s0) - (float4)(0.5f);</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="keyword">const</span> float4 new_y       = (float4)((coord.s1 + 0.5f) * scale.s1 - 0.5f);</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    <span class="keywordflow">return</span> (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);</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;}</div><div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;</div><div class="line"><a name="l00076"></a><span class="lineno"><a class="line" href="scale_8cl.xhtml#aec1496e8c3bdb3630f92433b1820e713">   76</a></span>&#160;__kernel <span class="keywordtype">void</span> <a class="code" href="scale_8cl.xhtml#aec1496e8c3bdb3630f92433b1820e713">scale_nearest_neighbour</a>(</div><div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;    <a class="code" href="helpers_8h.xhtml#a22f42fcf2077d951271df83b55c1a71a">IMAGE_DECLARATION</a>(in),</div><div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;    <a class="code" href="helpers_8h.xhtml#a22f42fcf2077d951271df83b55c1a71a">IMAGE_DECLARATION</a>(out),</div><div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> input_width,</div><div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> input_height,</div><div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> output_width,</div><div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> output_height)</div><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;{</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a>        in  = <a class="code" href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(in);</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a>        out = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(out);</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    <span class="keyword">const</span> float2 r   = (float2)(input_width / output_width, input_height / output_height);</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;    <span class="keyword">const</span> float8 tc  = <a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(<a class="code" href="scale_8cl.xhtml#a55c710b814464d9b8982c4eb6ca04dee">transform_nearest</a>(<a class="code" href="warp__helpers_8h.xhtml#a4caaeeb51ea58015267a9974675226d1">get_current_coords</a>(), r), input_width, input_height);</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    vstore4(<a class="code" href="warp__helpers_8h.xhtml#aba42442a4c991cdbb52727fa370676f1">read_texels4</a>(&amp;in, convert_int8(tc)), 0, (__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)out.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;}</div><div class="line"><a name="l00090"></a><span class="lineno">   90</span>&#160;</div><div class="line"><a name="l00110"></a><span class="lineno"><a class="line" href="scale_8cl.xhtml#a8d3a406833cc2a6e4eb51a43d5dcdc84">  110</a></span>&#160;__kernel <span class="keywordtype">void</span> <a class="code" href="scale_8cl.xhtml#a8d3a406833cc2a6e4eb51a43d5dcdc84">scale_bilinear</a>(</div><div class="line"><a name="l00111"></a><span class="lineno">  111</span>&#160;    <a class="code" href="helpers_8h.xhtml#a22f42fcf2077d951271df83b55c1a71a">IMAGE_DECLARATION</a>(in),</div><div class="line"><a name="l00112"></a><span class="lineno">  112</span>&#160;    <a class="code" href="helpers_8h.xhtml#a22f42fcf2077d951271df83b55c1a71a">IMAGE_DECLARATION</a>(out),</div><div class="line"><a name="l00113"></a><span class="lineno">  113</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> input_width,</div><div class="line"><a name="l00114"></a><span class="lineno">  114</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> input_height,</div><div class="line"><a name="l00115"></a><span class="lineno">  115</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> output_width,</div><div class="line"><a name="l00116"></a><span class="lineno">  116</span>&#160;    <span class="keyword">const</span> <span class="keywordtype">float</span> output_height)</div><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;{</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a>        in  = <a class="code" href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(in);</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a>        out = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(out);</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    <span class="keyword">const</span> float2 r   = (float2)(input_width / output_width, input_height / output_height);</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    <span class="keyword">const</span> float8 tc  = <a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(<a class="code" href="scale_8cl.xhtml#a1990e87858b15b8fce3f63965fb9b86c">transform_bilinear</a>(<a class="code" href="warp__helpers_8h.xhtml#a4caaeeb51ea58015267a9974675226d1">get_current_coords</a>(), r), input_width, input_height);</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    vstore4(<a class="code" href="warp__helpers_8h.xhtml#abea9f226daf3e0ad741d03cf7417d353">bilinear_interpolate</a>(&amp;in, tc, input_width, input_height), 0, (__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)out.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;}</div><div class="ttc" id="warp__helpers_8h_xhtml_adbdf2ca9e8fe0b67f9359929ef743126"><div class="ttname"><a href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a></div><div class="ttdeci">const float8 clamp_to_border(float8 coords, const float width, const float height)</div><div class="ttdoc">Clamps the given coordinates to the borders. </div><div class="ttdef"><b>Definition:</b> <a href="warp__helpers_8h_source.xhtml#l00033">warp_helpers.h:33</a></div></div>
 120 <div class="ttc" id="convolution3x3_8cl_xhtml_afb8c72ce35c4a1f4a2588d6573e54aa1"><div class="ttname"><a href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a></div><div class="ttdeci">#define DATA_TYPE</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00027">convolution3x3.cl:27</a></div></div>
 121 <div class="ttc" id="helpers_8h_xhtml_a4334a4a76f8e9628c0fb9e1acf616e2a"><div class="ttname"><a href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a></div><div class="ttdeci">#define CONVERT_TO_IMAGE_STRUCT_NO_STEP(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00076">helpers.h:76</a></div></div>
 122 <div class="ttc" id="helpers_8h_xhtml_a22f42fcf2077d951271df83b55c1a71a"><div class="ttname"><a href="helpers_8h.xhtml#a22f42fcf2077d951271df83b55c1a71a">IMAGE_DECLARATION</a></div><div class="ttdeci">#define IMAGE_DECLARATION(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00049">helpers.h:49</a></div></div>
 123 <div class="ttc" id="helpers_8h_xhtml"><div class="ttname"><a href="helpers_8h.xhtml">helpers.h</a></div></div>
 124 <div class="ttc" id="helpers_8h_xhtml_aebe814363556c244be043b13e7969197"><div class="ttname"><a href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a></div><div class="ttdeci">#define CONVERT_TO_IMAGE_STRUCT(name)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00073">helpers.h:73</a></div></div>
 125 <div class="ttc" id="scale_8cl_xhtml_a1990e87858b15b8fce3f63965fb9b86c"><div class="ttname"><a href="scale_8cl.xhtml#a1990e87858b15b8fce3f63965fb9b86c">transform_bilinear</a></div><div class="ttdeci">const float8 transform_bilinear(const float2 coord, const float2 scale)</div><div class="ttdoc">Transforms four 2D coordinates. </div><div class="ttdef"><b>Definition:</b> <a href="scale_8cl_source.xhtml#l00049">scale.cl:49</a></div></div>
 126 <div class="ttc" id="scale_8cl_xhtml_a8d3a406833cc2a6e4eb51a43d5dcdc84"><div class="ttname"><a href="scale_8cl.xhtml#a8d3a406833cc2a6e4eb51a43d5dcdc84">scale_bilinear</a></div><div class="ttdeci">__kernel void scale_bilinear(__global uchar *in_ptr, uint in_stride_x, uint in_step_x, uint in_stride_y, uint in_step_y, uint in_offset_first_element_in_bytes, __global uchar *out_ptr, uint out_stride_x, uint out_step_x, uint out_stride_y, uint out_step_y, uint out_offset_first_element_in_bytes, const float input_width, const float input_height, const float output_width, const float output_height)</div><div class="ttdoc">Performs an affine transformation on an image interpolating with the BILINEAR method. </div><div class="ttdef"><b>Definition:</b> <a href="scale_8cl_source.xhtml#l00110">scale.cl:110</a></div></div>
 127 <div class="ttc" id="scale_8cl_xhtml_a55c710b814464d9b8982c4eb6ca04dee"><div class="ttname"><a href="scale_8cl.xhtml#a55c710b814464d9b8982c4eb6ca04dee">transform_nearest</a></div><div class="ttdeci">const float8 transform_nearest(const float2 coord, const float2 scale)</div><div class="ttdoc">Transforms four 2D coordinates. </div><div class="ttdef"><b>Definition:</b> <a href="scale_8cl_source.xhtml#l00034">scale.cl:34</a></div></div>
 128 <div class="ttc" id="scale_8cl_xhtml_aec1496e8c3bdb3630f92433b1820e713"><div class="ttname"><a href="scale_8cl.xhtml#aec1496e8c3bdb3630f92433b1820e713">scale_nearest_neighbour</a></div><div class="ttdeci">__kernel void scale_nearest_neighbour(__global uchar *in_ptr, uint in_stride_x, uint in_step_x, uint in_stride_y, uint in_step_y, uint in_offset_first_element_in_bytes, __global uchar *out_ptr, uint out_stride_x, uint out_step_x, uint out_stride_y, uint out_step_y, uint out_offset_first_element_in_bytes, const float input_width, const float input_height, const float output_width, const float output_height)</div><div class="ttdoc">Performs an affine transformation on an image interpolating with the NEAREAST NEIGHBOUR method...</div><div class="ttdef"><b>Definition:</b> <a href="scale_8cl_source.xhtml#l00076">scale.cl:76</a></div></div>
 129 <div class="ttc" id="struct_image_xhtml"><div class="ttname"><a href="struct_image.xhtml">Image</a></div><div class="ttdoc">Structure to hold Image information. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00095">helpers.h:95</a></div></div>
 130 <div class="ttc" id="struct_image_xhtml_acf52c23cbd7424606c10a606524e3e32"><div class="ttname"><a href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">Image::ptr</a></div><div class="ttdeci">__global uchar * ptr</div><div class="ttdoc">Pointer to the starting postion of the buffer. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00097">helpers.h:97</a></div></div>
 131 <div class="ttc" id="warp__helpers_8h_xhtml"><div class="ttname"><a href="warp__helpers_8h.xhtml">warp_helpers.h</a></div></div>
 132 <div class="ttc" id="warp__helpers_8h_xhtml_aba42442a4c991cdbb52727fa370676f1"><div class="ttname"><a href="warp__helpers_8h.xhtml#aba42442a4c991cdbb52727fa370676f1">read_texels4</a></div><div class="ttdeci">const DATA_TYPE4 read_texels4(const Image *in, const int8 coords)</div><div class="ttdoc">Reads four texels from the input image. </div><div class="ttdef"><b>Definition:</b> <a href="warp__helpers_8h_source.xhtml#l00045">warp_helpers.h:45</a></div></div>
 133 <div class="ttc" id="warp__helpers_8h_xhtml_a4caaeeb51ea58015267a9974675226d1"><div class="ttname"><a href="warp__helpers_8h.xhtml#a4caaeeb51ea58015267a9974675226d1">get_current_coords</a></div><div class="ttdeci">const float2 get_current_coords()</div><div class="ttdoc">Returns the current thread coordinates. </div><div class="ttdef"><b>Definition:</b> <a href="warp__helpers_8h_source.xhtml#l00054">warp_helpers.h:54</a></div></div>
 134 <div class="ttc" id="warp__helpers_8h_xhtml_abea9f226daf3e0ad741d03cf7417d353"><div class="ttname"><a href="warp__helpers_8h.xhtml#abea9f226daf3e0ad741d03cf7417d353">bilinear_interpolate</a></div><div class="ttdeci">const DATA_TYPE4 bilinear_interpolate(const Image *in, const float8 coords, const float width, const float height)</div><div class="ttdoc">Computes the bilinear interpolation for each set of coordinates in the vector coords and returns the ...</div><div class="ttdef"><b>Definition:</b> <a href="warp__helpers_8h_source.xhtml#l00080">warp_helpers.h:80</a></div></div>
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