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| <div class="title">warp_perspective.cl</div> </div> |
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| <div class="contents"> |
| <a href="warp__perspective_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> <span class="comment">/*</span></div> |
| <div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2016, 2017 ARM Limited.</span></div> |
| <div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * SPDX-License-Identifier: MIT</span></div> |
| <div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <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> <span class="comment"> * of this software and associated documentation files (the "Software"), to</span></div> |
| <div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <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> <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> <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> <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> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <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> <span class="comment"> * copies or substantial portions of the Software.</span></div> |
| <div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div> |
| <div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span></div> |
| <div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <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> <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> <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> <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> <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> <span class="comment"> * SOFTWARE.</span></div> |
| <div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> */</span></div> |
| <div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="preprocessor">#include "<a class="code" href="helpers_8h.xhtml">helpers.h</a>"</span></div> |
| <div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#include "<a class="code" href="warp__helpers_8h.xhtml">warp_helpers.h</a>"</span></div> |
| <div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div> |
| <div class="line"><a name="l00028"></a><span class="lineno"><a class="line" href="warp__perspective_8cl.xhtml#aa02a47b9dfa96a2705d5c77044a40048"> 28</a></span> <span class="keyword">inline</span> <span class="keyword">const</span> float16 <a class="code" href="warp__perspective_8cl.xhtml#aa02a47b9dfa96a2705d5c77044a40048">build_perspective_mtx</a>()</div> |
| <div class="line"><a name="l00029"></a><span class="lineno"> 29</span> {</div> |
| <div class="line"><a name="l00030"></a><span class="lineno"> 30</span>  <span class="keywordflow">return</span> (float16)(MAT0, MAT1, MAT2, MAT3, MAT4, MAT5, MAT6, MAT7, MAT8, 0, 0, 0, (float4)0);</div> |
| <div class="line"><a name="l00031"></a><span class="lineno"> 31</span> }</div> |
| <div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div> |
| <div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="warp__perspective_8cl.xhtml#a2791d623c1dbcf7e7111b8ff1b7daeeb"> 46</a></span> <span class="keyword">inline</span> <span class="keyword">const</span> float8 <a class="code" href="warp__perspective_8cl.xhtml#a2791d623c1dbcf7e7111b8ff1b7daeeb">apply_perspective_transform</a>(<span class="keyword">const</span> float2 coord, <span class="keyword">const</span> float16 mtx)</div> |
| <div class="line"><a name="l00047"></a><span class="lineno"> 47</span> {</div> |
| <div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  <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="l00049"></a><span class="lineno"> 49</span>  <span class="comment">// transform [z,z+1,z+2,z+3]</span></div> |
| <div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">const</span> float4 z = (float4)mad(in_x_coords, (float4)(mtx.s2), mad((float4)(coord.s1), (float4)(mtx.s5), (float4)(mtx.s8)));</div> |
| <div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  <span class="comment">// NOTE: Do not multiply x&y by 1.f/Z as this will result in loss of accuracy and mismatches with VX reference implementation</span></div> |
| <div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="comment">// transform [x,x+1,x+2,x+3]</span></div> |
| <div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keyword">const</span> float4 new_x = (float4)mad(in_x_coords, (float4)(mtx.s0), mad((float4)(coord.s1), (float4)(mtx.s3), (float4)(mtx.s6))) / z;</div> |
| <div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="comment">// transform [y,y+1,y+2,y+3]</span></div> |
| <div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">const</span> float4 new_y = (float4)mad(in_x_coords, (float4)(mtx.s1), mad((float4)(coord.s1), (float4)(mtx.s4), (float4)(mtx.s7))) / z;</div> |
| <div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <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="l00057"></a><span class="lineno"> 57</span> }</div> |
| <div class="line"><a name="l00058"></a><span class="lineno"> 58</span> </div> |
| <div class="line"><a name="l00087"></a><span class="lineno"><a class="line" href="warp__perspective_8cl.xhtml#ab8f5d79d7699ec7e2a805a25ca0fca2b"> 87</a></span> __kernel <span class="keywordtype">void</span> <a class="code" href="warp__perspective_8cl.xhtml#ab8f5d79d7699ec7e2a805a25ca0fca2b">warp_perspective_nearest_neighbour</a>(</div> |
| <div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <a class="code" href="helpers_8h.xhtml#a22f42fcf2077d951271df83b55c1a71a">IMAGE_DECLARATION</a>(in),</div> |
| <div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <a class="code" href="helpers_8h.xhtml#a22f42fcf2077d951271df83b55c1a71a">IMAGE_DECLARATION</a>(out),</div> |
| <div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> width,</div> |
| <div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> height)</div> |
| <div class="line"><a name="l00092"></a><span class="lineno"> 92</span> {</div> |
| <div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <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="l00094"></a><span class="lineno"> 94</span>  <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="l00095"></a><span class="lineno"> 95</span>  vstore4(<a class="code" href="warp__helpers_8h.xhtml#aba42442a4c991cdbb52727fa370676f1">read_texels4</a>(&in, convert_int8_rtn(<a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(<a class="code" href="warp__perspective_8cl.xhtml#a2791d623c1dbcf7e7111b8ff1b7daeeb">apply_perspective_transform</a>(<a class="code" href="warp__helpers_8h.xhtml#a4caaeeb51ea58015267a9974675226d1">get_current_coords</a>(), <a class="code" href="warp__perspective_8cl.xhtml#aa02a47b9dfa96a2705d5c77044a40048">build_perspective_mtx</a>()), width, height))), 0, out.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div> |
| <div class="line"><a name="l00096"></a><span class="lineno"> 96</span> }</div> |
| <div class="line"><a name="l00097"></a><span class="lineno"> 97</span> </div> |
| <div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="warp__perspective_8cl.xhtml#a5dba6d401b54fd02d20a2ba246668d93"> 119</a></span> __kernel <span class="keywordtype">void</span> <a class="code" href="warp__perspective_8cl.xhtml#a5dba6d401b54fd02d20a2ba246668d93">warp_perspective_bilinear</a>(</div> |
| <div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  <a class="code" href="helpers_8h.xhtml#a22f42fcf2077d951271df83b55c1a71a">IMAGE_DECLARATION</a>(in),</div> |
| <div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <a class="code" href="helpers_8h.xhtml#a22f42fcf2077d951271df83b55c1a71a">IMAGE_DECLARATION</a>(out),</div> |
| <div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> width,</div> |
| <div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> height)</div> |
| <div class="line"><a name="l00124"></a><span class="lineno"> 124</span> {</div> |
| <div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <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="l00126"></a><span class="lineno"> 126</span>  <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="l00127"></a><span class="lineno"> 127</span>  vstore4(<a class="code" href="warp__helpers_8h.xhtml#abea9f226daf3e0ad741d03cf7417d353">bilinear_interpolate</a>(&in, <a class="code" href="warp__perspective_8cl.xhtml#a2791d623c1dbcf7e7111b8ff1b7daeeb">apply_perspective_transform</a>(<a class="code" href="warp__helpers_8h.xhtml#a4caaeeb51ea58015267a9974675226d1">get_current_coords</a>(), <a class="code" href="warp__perspective_8cl.xhtml#aa02a47b9dfa96a2705d5c77044a40048">build_perspective_mtx</a>()), width, height), 0, out.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div> |
| <div class="line"><a name="l00128"></a><span class="lineno"> 128</span> }</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> |
| <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#l00096">helpers.h:96</a></div></div> |
| <div class="ttc" id="warp__perspective_8cl_xhtml_a2791d623c1dbcf7e7111b8ff1b7daeeb"><div class="ttname"><a href="warp__perspective_8cl.xhtml#a2791d623c1dbcf7e7111b8ff1b7daeeb">apply_perspective_transform</a></div><div class="ttdeci">const float8 apply_perspective_transform(const float2 coord, const float16 mtx)</div><div class="ttdoc">Transforms four 2D coordinates using the formula: </div><div class="ttdef"><b>Definition:</b> <a href="warp__perspective_8cl_source.xhtml#l00046">warp_perspective.cl:46</a></div></div> |
| <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#l00057">helpers.h:57</a></div></div> |
| <div class="ttc" id="helpers_8h_xhtml"><div class="ttname"><a href="helpers_8h.xhtml">helpers.h</a></div></div> |
| <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#l00093">helpers.h:93</a></div></div> |
| <div class="ttc" id="warp__perspective_8cl_xhtml_aa02a47b9dfa96a2705d5c77044a40048"><div class="ttname"><a href="warp__perspective_8cl.xhtml#aa02a47b9dfa96a2705d5c77044a40048">build_perspective_mtx</a></div><div class="ttdeci">const float16 build_perspective_mtx()</div><div class="ttdoc">Returns the perspective matrix. </div><div class="ttdef"><b>Definition:</b> <a href="warp__perspective_8cl_source.xhtml#l00028">warp_perspective.cl:28</a></div></div> |
| <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#l00131">helpers.h:131</a></div></div> |
| <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#l00133">helpers.h:133</a></div></div> |
| <div class="ttc" id="warp__helpers_8h_xhtml"><div class="ttname"><a href="warp__helpers_8h.xhtml">warp_helpers.h</a></div></div> |
| <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> |
| <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> |
| <div class="ttc" id="warp__perspective_8cl_xhtml_ab8f5d79d7699ec7e2a805a25ca0fca2b"><div class="ttname"><a href="warp__perspective_8cl.xhtml#ab8f5d79d7699ec7e2a805a25ca0fca2b">warp_perspective_nearest_neighbour</a></div><div class="ttdeci">__kernel void warp_perspective_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 int width, const int height)</div><div class="ttdoc">Performs perspective transformation on an image interpolating with the NEAREAST NEIGHBOUR method...</div><div class="ttdef"><b>Definition:</b> <a href="warp__perspective_8cl_source.xhtml#l00087">warp_perspective.cl:87</a></div></div> |
| <div class="ttc" id="warp__perspective_8cl_xhtml_a5dba6d401b54fd02d20a2ba246668d93"><div class="ttname"><a href="warp__perspective_8cl.xhtml#a5dba6d401b54fd02d20a2ba246668d93">warp_perspective_bilinear</a></div><div class="ttdeci">__kernel void warp_perspective_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 int width, const int height)</div><div class="ttdoc">Performs a perspective transform on an image interpolating with the BILINEAR method. </div><div class="ttdef"><b>Definition:</b> <a href="warp__perspective_8cl_source.xhtml#l00119">warp_perspective.cl:119</a></div></div> |
| <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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| <li class="navelem"><a class="el" href="dir_55b5a5006e943fb664ff8cff3cfe7768.xhtml">src</a></li><li class="navelem"><a class="el" href="dir_f6c3ae42d7e27145d0a3c3e38ca1c000.xhtml">core</a></li><li class="navelem"><a class="el" href="dir_1b7ae9123c88e650426d50d95c19d414.xhtml">CL</a></li><li class="navelem"><a class="el" href="dir_b7c3d80b0dadb2139bc73b7161751c12.xhtml">cl_kernels</a></li><li class="navelem"><a class="el" href="warp__perspective_8cl.xhtml">warp_perspective.cl</a></li> |
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