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gerrit-public.fairphone.software / platform / external / ComputeLibrary / 975dfe175e3d7c62c27598b1c0e8e77ed90df463 / . / documentation / warp__affine_8cl.xhtml
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98<div class="header">
99 <div class="summary">
100<a href="#func-members">Functions</a> </div>
101 <div class="headertitle">
102<div class="title">warp_affine.cl File Reference</div> </div>
103</div><!--header-->
104<div class="contents">
Jenkinsb9abeae2018-11-22 11:58:08 +0000[diff] [blame]105<div class="textblock"><code>#include &quot;<a class="el" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml">helpers.h</a>&quot;</code><br />
Anthony Barbier8140e1e2017-12-14 23:48:46 +0000[diff] [blame]106<code>#include &quot;<a class="el" href="warp__helpers_8h_source.xhtml">warp_helpers.h</a>&quot;</code><br />
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]107</div>
108<p><a href="warp__affine_8cl_source.xhtml">Go to the source code of this file.</a></p>
109<table class="memberdecls">
110<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
111Functions</h2></td></tr>
112<tr class="memitem:aecca3f284d1acabfa6d1bd8905dc036e"><td class="memItemLeft" align="right" valign="top">const float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="warp__affine_8cl.xhtml#aecca3f284d1acabfa6d1bd8905dc036e">build_affine_mtx</a> ()</td></tr>
Anthony Barbier8140e1e2017-12-14 23:48:46 +0000[diff] [blame]113<tr class="memdesc:aecca3f284d1acabfa6d1bd8905dc036e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns a vector of floats contaning the matrix coefficients. <a href="#aecca3f284d1acabfa6d1bd8905dc036e">More...</a><br /></td></tr>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]114<tr class="separator:aecca3f284d1acabfa6d1bd8905dc036e"><td class="memSeparator" colspan="2">&#160;</td></tr>
115<tr class="memitem:a78e971ccef9598f9545f344d3a90a312"><td class="memItemLeft" align="right" valign="top">const float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="warp__affine_8cl.xhtml#a78e971ccef9598f9545f344d3a90a312">apply_affine_transform</a> (const float2 coord, const float8 mtx)</td></tr>
Anthony Barbier8140e1e2017-12-14 23:48:46 +0000[diff] [blame]116<tr class="memdesc:a78e971ccef9598f9545f344d3a90a312"><td class="mdescLeft">&#160;</td><td class="mdescRight">Transforms 4 2D coordinates using the formula: <a href="#a78e971ccef9598f9545f344d3a90a312">More...</a><br /></td></tr>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]117<tr class="separator:a78e971ccef9598f9545f344d3a90a312"><td class="memSeparator" colspan="2">&#160;</td></tr>
Jenkins52ba29e2018-08-29 15:32:11 +0000[diff] [blame]118<tr class="memitem:a716ebd98bb81a3addb7f4d769e118dd9"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="warp__affine_8cl.xhtml#a716ebd98bb81a3addb7f4d769e118dd9">warp_affine_nearest_neighbour</a> (__global uchar *in_ptr, uint <a class="el" href="depthwise__convolution_8cl.xhtml#a5447e2c4e1aae8fff9290b775fe813ff">in_stride_x</a>, uint in_step_x, uint <a class="el" href="depthwise__convolution_8cl.xhtml#ac353c0687abd8c71a4fa096d322b39ec">in_stride_y</a>, uint in_step_y, uint in_offset_first_element_in_bytes, __global uchar *out_ptr, uint <a class="el" href="depthwise__convolution_8cl.xhtml#a68fce1f0ee4080ed89c9427496d625f2">out_stride_x</a>, uint out_step_x, uint <a class="el" href="depthwise__convolution_8cl.xhtml#ac8b6b732372937bba276e6391944d1e1">out_stride_y</a>, uint out_step_y, uint out_offset_first_element_in_bytes, const int width, const int height)</td></tr>
Anthony Barbier8140e1e2017-12-14 23:48:46 +0000[diff] [blame]119<tr class="memdesc:a716ebd98bb81a3addb7f4d769e118dd9"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs an affine transform on an image interpolating with the NEAREAST NEIGHBOUR method. <a href="#a716ebd98bb81a3addb7f4d769e118dd9">More...</a><br /></td></tr>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]120<tr class="separator:a716ebd98bb81a3addb7f4d769e118dd9"><td class="memSeparator" colspan="2">&#160;</td></tr>
Jenkins52ba29e2018-08-29 15:32:11 +0000[diff] [blame]121<tr class="memitem:a4a77d9bbbc01353083729a076cedc38c"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="warp__affine_8cl.xhtml#a4a77d9bbbc01353083729a076cedc38c">warp_affine_bilinear</a> (__global uchar *in_ptr, uint <a class="el" href="depthwise__convolution_8cl.xhtml#a5447e2c4e1aae8fff9290b775fe813ff">in_stride_x</a>, uint in_step_x, uint <a class="el" href="depthwise__convolution_8cl.xhtml#ac353c0687abd8c71a4fa096d322b39ec">in_stride_y</a>, uint in_step_y, uint in_offset_first_element_in_bytes, __global uchar *out_ptr, uint <a class="el" href="depthwise__convolution_8cl.xhtml#a68fce1f0ee4080ed89c9427496d625f2">out_stride_x</a>, uint out_step_x, uint <a class="el" href="depthwise__convolution_8cl.xhtml#ac8b6b732372937bba276e6391944d1e1">out_stride_y</a>, uint out_step_y, uint out_offset_first_element_in_bytes, const int width, const int height)</td></tr>
Anthony Barbier8140e1e2017-12-14 23:48:46 +0000[diff] [blame]122<tr class="memdesc:a4a77d9bbbc01353083729a076cedc38c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs an affine transform on an image interpolating with the BILINEAR method. <a href="#a4a77d9bbbc01353083729a076cedc38c">More...</a><br /></td></tr>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]123<tr class="separator:a4a77d9bbbc01353083729a076cedc38c"><td class="memSeparator" colspan="2">&#160;</td></tr>
124</table>
125<h2 class="groupheader">Function Documentation</h2>
Jenkinsb9abeae2018-11-22 11:58:08 +0000[diff] [blame]126<a id="a78e971ccef9598f9545f344d3a90a312"></a>
127<h2 class="memtitle"><span class="permalink"><a href="#a78e971ccef9598f9545f344d3a90a312">&#9670;&nbsp;</a></span>apply_affine_transform()</h2>
128
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]129<div class="memitem">
130<div class="memproto">
131<table class="mlabels">
132 <tr>
133 <td class="mlabels-left">
134 <table class="memname">
135 <tr>
136 <td class="memname">const float8 apply_affine_transform </td>
137 <td>(</td>
138 <td class="paramtype">const float2&#160;</td>
139 <td class="paramname"><em>coord</em>, </td>
140 </tr>
141 <tr>
142 <td class="paramkey"></td>
143 <td></td>
144 <td class="paramtype">const float8&#160;</td>
145 <td class="paramname"><em>mtx</em>&#160;</td>
146 </tr>
147 <tr>
148 <td></td>
149 <td>)</td>
150 <td></td><td></td>
151 </tr>
152 </table>
153 </td>
154 <td class="mlabels-right">
155<span class="mlabels"><span class="mlabel">inline</span></span> </td>
156 </tr>
157</table>
158</div><div class="memdoc">
159
160<p>Transforms 4 2D coordinates using the formula: </p>
161<p>x0 = M[1][1] * x + M[1][2] * y + M[1][3] y0 = M[2][1] * x + M[2][2] * y + M[2][3]</p>
162<dl class="params"><dt>Parameters</dt><dd>
163 <table class="params">
164 <tr><td class="paramdir">[in]</td><td class="paramname">coord</td><td>2D coordinate to transform. </td></tr>
165 <tr><td class="paramdir">[in]</td><td class="paramname">mtx</td><td>affine matrix</td></tr>
166 </table>
167 </dd>
168</dl>
169<dl class="section return"><dt>Returns</dt><dd>a int8 containing 4 2D transformed values. </dd></dl>
170
Jenkinsb9abeae2018-11-22 11:58:08 +0000[diff] [blame]171<p class="definition">Definition at line <a class="el" href="warp__affine_8cl_source.xhtml#l00043">43</a> of file <a class="el" href="warp__affine_8cl_source.xhtml">warp_affine.cl</a>.</p>
Anthony Barbier8140e1e2017-12-14 23:48:46 +0000[diff] [blame]172<div class="fragment"><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;{</div><div class="line"><a name="l00045"></a><span class="lineno"> 45</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="l00046"></a><span class="lineno"> 46</span>&#160; <span class="comment">// transform [x,x+1,x+2,x+3]</span></div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keyword">const</span> float4 new_x = mad(<span class="comment">/*A*/</span> in_x_coords, (float4)(mtx.s0) <span class="comment">/*B*/</span>, mad((float4)(coord.s1), (float4)(mtx.s2), (float4)(mtx.s4)));</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; <span class="comment">// transform [y,y+1,y+2,y+3]</span></div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; <span class="keyword">const</span> float4 new_y = mad(in_x_coords, (float4)(mtx.s1), mad((float4)(coord.s1), (float4)(mtx.s3), (float4)(mtx.s5)));</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</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="l00051"></a><span class="lineno"> 51</span>&#160;}</div></div><!-- fragment -->
Jenkins514be652019-02-28 12:25:18 +0000[diff] [blame]173<p class="reference">Referenced by <a class="el" href="warp__affine_8cl_source.xhtml#l00111">warp_affine_bilinear()</a>, and <a class="el" href="warp__affine_8cl_source.xhtml#l00079">warp_affine_nearest_neighbour()</a>.</p>
174
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]175</div>
176</div>
Jenkinsb9abeae2018-11-22 11:58:08 +0000[diff] [blame]177<a id="aecca3f284d1acabfa6d1bd8905dc036e"></a>
178<h2 class="memtitle"><span class="permalink"><a href="#aecca3f284d1acabfa6d1bd8905dc036e">&#9670;&nbsp;</a></span>build_affine_mtx()</h2>
179
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]180<div class="memitem">
181<div class="memproto">
182<table class="mlabels">
183 <tr>
184 <td class="mlabels-left">
185 <table class="memname">
186 <tr>
187 <td class="memname">const float8 build_affine_mtx </td>
188 <td>(</td>
189 <td class="paramname"></td><td>)</td>
190 <td></td>
191 </tr>
192 </table>
193 </td>
194 <td class="mlabels-right">
195<span class="mlabels"><span class="mlabel">inline</span></span> </td>
196 </tr>
197</table>
198</div><div class="memdoc">
199
200<p>Returns a vector of floats contaning the matrix coefficients. </p>
201
Jenkinsb9abeae2018-11-22 11:58:08 +0000[diff] [blame]202<p class="definition">Definition at line <a class="el" href="warp__affine_8cl_source.xhtml#l00028">28</a> of file <a class="el" href="warp__affine_8cl_source.xhtml">warp_affine.cl</a>.</p>
Anthony Barbier8140e1e2017-12-14 23:48:46 +0000[diff] [blame]203<div class="fragment"><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;{</div><div class="line"><a name="l00030"></a><span class="lineno"> 30</span>&#160; <span class="keywordflow">return</span> (float8)(MAT0, MAT1, MAT2, MAT3, MAT4, MAT5, 0, 0);</div><div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;}</div></div><!-- fragment -->
Jenkins514be652019-02-28 12:25:18 +0000[diff] [blame]204<p class="reference">Referenced by <a class="el" href="warp__affine_8cl_source.xhtml#l00111">warp_affine_bilinear()</a>, and <a class="el" href="warp__affine_8cl_source.xhtml#l00079">warp_affine_nearest_neighbour()</a>.</p>
205
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]206</div>
207</div>
Jenkinsb9abeae2018-11-22 11:58:08 +0000[diff] [blame]208<a id="a4a77d9bbbc01353083729a076cedc38c"></a>
209<h2 class="memtitle"><span class="permalink"><a href="#a4a77d9bbbc01353083729a076cedc38c">&#9670;&nbsp;</a></span>warp_affine_bilinear()</h2>
210
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]211<div class="memitem">
212<div class="memproto">
213 <table class="memname">
214 <tr>
215 <td class="memname">__kernel void warp_affine_bilinear </td>
216 <td>(</td>
217 <td class="paramtype">__global uchar *&#160;</td>
218 <td class="paramname"><em>in_ptr</em>, </td>
219 </tr>
220 <tr>
221 <td class="paramkey"></td>
222 <td></td>
223 <td class="paramtype">uint&#160;</td>
224 <td class="paramname"><em>in_stride_x</em>, </td>
225 </tr>
226 <tr>
227 <td class="paramkey"></td>
228 <td></td>
229 <td class="paramtype">uint&#160;</td>
230 <td class="paramname"><em>in_step_x</em>, </td>
231 </tr>
232 <tr>
233 <td class="paramkey"></td>
234 <td></td>
235 <td class="paramtype">uint&#160;</td>
236 <td class="paramname"><em>in_stride_y</em>, </td>
237 </tr>
238 <tr>
239 <td class="paramkey"></td>
240 <td></td>
241 <td class="paramtype">uint&#160;</td>
242 <td class="paramname"><em>in_step_y</em>, </td>
243 </tr>
244 <tr>
245 <td class="paramkey"></td>
246 <td></td>
247 <td class="paramtype">uint&#160;</td>
248 <td class="paramname"><em>in_offset_first_element_in_bytes</em>, </td>
249 </tr>
250 <tr>
251 <td class="paramkey"></td>
252 <td></td>
253 <td class="paramtype">__global uchar *&#160;</td>
254 <td class="paramname"><em>out_ptr</em>, </td>
255 </tr>
256 <tr>
257 <td class="paramkey"></td>
258 <td></td>
259 <td class="paramtype">uint&#160;</td>
260 <td class="paramname"><em>out_stride_x</em>, </td>
261 </tr>
262 <tr>
263 <td class="paramkey"></td>
264 <td></td>
265 <td class="paramtype">uint&#160;</td>
266 <td class="paramname"><em>out_step_x</em>, </td>
267 </tr>
268 <tr>
269 <td class="paramkey"></td>
270 <td></td>
271 <td class="paramtype">uint&#160;</td>
272 <td class="paramname"><em>out_stride_y</em>, </td>
273 </tr>
274 <tr>
275 <td class="paramkey"></td>
276 <td></td>
277 <td class="paramtype">uint&#160;</td>
278 <td class="paramname"><em>out_step_y</em>, </td>
279 </tr>
280 <tr>
281 <td class="paramkey"></td>
282 <td></td>
283 <td class="paramtype">uint&#160;</td>
284 <td class="paramname"><em>out_offset_first_element_in_bytes</em>, </td>
285 </tr>
286 <tr>
287 <td class="paramkey"></td>
288 <td></td>
289 <td class="paramtype">const int&#160;</td>
290 <td class="paramname"><em>width</em>, </td>
291 </tr>
292 <tr>
293 <td class="paramkey"></td>
294 <td></td>
295 <td class="paramtype">const int&#160;</td>
296 <td class="paramname"><em>height</em>&#160;</td>
297 </tr>
298 <tr>
299 <td></td>
300 <td>)</td>
301 <td></td><td></td>
302 </tr>
303 </table>
304</div><div class="memdoc">
305
306<p>Performs an affine transform on an image interpolating with the BILINEAR method. </p>
307<p>Input and output are single channel U8.</p>
Anthony Barbier8140e1e2017-12-14 23:48:46 +0000[diff] [blame]308<dl class="section attention"><dt>Attention</dt><dd>The matrix coefficients need to be passed at compile time:<br />
309const char build_options [] = "-DMAT0=1 -DMAT1=2 -DMAT2=1 -DMAT3=2 -DMAT4=4 -DMAT5=2 "<br />
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]310clBuildProgram( program, 0, NULL, build_options, NULL, NULL);</dd></dl>
311<dl class="params"><dt>Parameters</dt><dd>
312 <table class="params">
313 <tr><td class="paramdir">[in]</td><td class="paramname">in_ptr</td><td>Pointer to the source image. Supported data types: U8. </td></tr>
314 <tr><td class="paramdir">[in]</td><td class="paramname">in_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr>
315 <tr><td class="paramdir">[in]</td><td class="paramname">in_step_x</td><td>in_stride_x * number of elements along X processed per work item (in bytes) </td></tr>
316 <tr><td class="paramdir">[in]</td><td class="paramname">in_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr>
317 <tr><td class="paramdir">[in]</td><td class="paramname">in_step_y</td><td>in_stride_y * number of elements along Y processed per work item (in bytes) </td></tr>
318 <tr><td class="paramdir">[in]</td><td class="paramname">in_offset_first_element_in_bytes</td><td>Offset of the first element in the source image </td></tr>
319 <tr><td class="paramdir">[out]</td><td class="paramname">out_ptr</td><td>Pointer to the destination image. Supported data types: U8. </td></tr>
320 <tr><td class="paramdir">[in]</td><td class="paramname">out_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
321 <tr><td class="paramdir">[in]</td><td class="paramname">out_step_x</td><td>out_stride_x * number of elements along X processed per work item (in bytes) </td></tr>
322 <tr><td class="paramdir">[in]</td><td class="paramname">out_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
323 <tr><td class="paramdir">[in]</td><td class="paramname">out_step_y</td><td>out_stride_y * number of elements along Y processed per work item (in bytes) </td></tr>
324 <tr><td class="paramdir">[in]</td><td class="paramname">out_offset_first_element_in_bytes</td><td>Offset of the first element in the destination image </td></tr>
325 <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>Width of the destination image </td></tr>
326 <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the destination image </td></tr>
327 </table>
328 </dd>
329</dl>
330
Jenkinsb9abeae2018-11-22 11:58:08 +0000[diff] [blame]331<p class="definition">Definition at line <a class="el" href="warp__affine_8cl_source.xhtml#l00111">111</a> of file <a class="el" href="warp__affine_8cl_source.xhtml">warp_affine.cl</a>.</p>
Jenkins975dfe12019-09-02 11:47:54 +0100[diff] [blame^]332<div class="fragment"><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160;{</div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>&#160; <a class="code" href="struct_image.xhtml">Image</a> in = <a class="code" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(in);</div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span>&#160; <a class="code" href="struct_image.xhtml">Image</a> out = <a class="code" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(out);</div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>&#160; vstore4(<a class="code" href="warp__helpers_8h.xhtml#abea9f226daf3e0ad741d03cf7417d353">bilinear_interpolate</a>(&amp;in, <a class="code" href="warp__affine_8cl.xhtml#a78e971ccef9598f9545f344d3a90a312">apply_affine_transform</a>(<a class="code" href="warp__helpers_8h.xhtml#a4caaeeb51ea58015267a9974675226d1">get_current_coords</a>(), <a class="code" href="warp__affine_8cl.xhtml#aecca3f284d1acabfa6d1bd8905dc036e">build_affine_mtx</a>()), width, height), 0, out.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;}</div><div class="ttc" id="src_2core_2_c_l_2cl__kernels_2_helpers_8h_xhtml_aebe814363556c244be043b13e7969197"><div class="ttname"><a href="src_2core_2_c_l_2cl__kernels_2_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="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00129">helpers.h:129</a></div></div>
Jenkins514be652019-02-28 12:25:18 +0000[diff] [blame]333<div class="ttc" id="warp__affine_8cl_xhtml_aecca3f284d1acabfa6d1bd8905dc036e"><div class="ttname"><a href="warp__affine_8cl.xhtml#aecca3f284d1acabfa6d1bd8905dc036e">build_affine_mtx</a></div><div class="ttdeci">const float8 build_affine_mtx()</div><div class="ttdoc">Returns a vector of floats contaning the matrix coefficients.</div><div class="ttdef"><b>Definition:</b> <a href="warp__affine_8cl_source.xhtml#l00028">warp_affine.cl:28</a></div></div>
Jenkins975dfe12019-09-02 11:47:54 +0100[diff] [blame^]334<div class="ttc" id="src_2core_2_c_l_2cl__kernels_2_helpers_8h_xhtml_a4334a4a76f8e9628c0fb9e1acf616e2a"><div class="ttname"><a href="src_2core_2_c_l_2cl__kernels_2_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="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00132">helpers.h:132</a></div></div>
335<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="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00167">helpers.h:167</a></div></div>
336<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="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00169">helpers.h:169</a></div></div>
Jenkins514be652019-02-28 12:25:18 +0000[diff] [blame]337<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#l00068">warp_helpers.h:68</a></div></div>
338<div class="ttc" id="warp__affine_8cl_xhtml_a78e971ccef9598f9545f344d3a90a312"><div class="ttname"><a href="warp__affine_8cl.xhtml#a78e971ccef9598f9545f344d3a90a312">apply_affine_transform</a></div><div class="ttdeci">const float8 apply_affine_transform(const float2 coord, const float8 mtx)</div><div class="ttdoc">Transforms 4 2D coordinates using the formula:</div><div class="ttdef"><b>Definition:</b> <a href="warp__affine_8cl_source.xhtml#l00043">warp_affine.cl:43</a></div></div>
Jenkinsb9abeae2018-11-22 11:58:08 +0000[diff] [blame]339<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#l00137">warp_helpers.h:137</a></div></div>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]340</div><!-- fragment -->
Jenkins975dfe12019-09-02 11:47:54 +0100[diff] [blame^]341<p class="reference">References <a class="el" href="warp__affine_8cl_source.xhtml#l00043">apply_affine_transform()</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00137">bilinear_interpolate()</a>, <a class="el" href="warp__affine_8cl_source.xhtml#l00028">build_affine_mtx()</a>, <a class="el" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00129">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00132">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00068">get_current_coords()</a>, and <a class="el" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00169">Image::ptr</a>.</p>
Jenkins514be652019-02-28 12:25:18 +0000[diff] [blame]342
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]343</div>
344</div>
Jenkinsb9abeae2018-11-22 11:58:08 +0000[diff] [blame]345<a id="a716ebd98bb81a3addb7f4d769e118dd9"></a>
346<h2 class="memtitle"><span class="permalink"><a href="#a716ebd98bb81a3addb7f4d769e118dd9">&#9670;&nbsp;</a></span>warp_affine_nearest_neighbour()</h2>
347
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]348<div class="memitem">
349<div class="memproto">
350 <table class="memname">
351 <tr>
352 <td class="memname">__kernel void warp_affine_nearest_neighbour </td>
353 <td>(</td>
354 <td class="paramtype">__global uchar *&#160;</td>
355 <td class="paramname"><em>in_ptr</em>, </td>
356 </tr>
357 <tr>
358 <td class="paramkey"></td>
359 <td></td>
360 <td class="paramtype">uint&#160;</td>
361 <td class="paramname"><em>in_stride_x</em>, </td>
362 </tr>
363 <tr>
364 <td class="paramkey"></td>
365 <td></td>
366 <td class="paramtype">uint&#160;</td>
367 <td class="paramname"><em>in_step_x</em>, </td>
368 </tr>
369 <tr>
370 <td class="paramkey"></td>
371 <td></td>
372 <td class="paramtype">uint&#160;</td>
373 <td class="paramname"><em>in_stride_y</em>, </td>
374 </tr>
375 <tr>
376 <td class="paramkey"></td>
377 <td></td>
378 <td class="paramtype">uint&#160;</td>
379 <td class="paramname"><em>in_step_y</em>, </td>
380 </tr>
381 <tr>
382 <td class="paramkey"></td>
383 <td></td>
384 <td class="paramtype">uint&#160;</td>
385 <td class="paramname"><em>in_offset_first_element_in_bytes</em>, </td>
386 </tr>
387 <tr>
388 <td class="paramkey"></td>
389 <td></td>
390 <td class="paramtype">__global uchar *&#160;</td>
391 <td class="paramname"><em>out_ptr</em>, </td>
392 </tr>
393 <tr>
394 <td class="paramkey"></td>
395 <td></td>
396 <td class="paramtype">uint&#160;</td>
397 <td class="paramname"><em>out_stride_x</em>, </td>
398 </tr>
399 <tr>
400 <td class="paramkey"></td>
401 <td></td>
402 <td class="paramtype">uint&#160;</td>
403 <td class="paramname"><em>out_step_x</em>, </td>
404 </tr>
405 <tr>
406 <td class="paramkey"></td>
407 <td></td>
408 <td class="paramtype">uint&#160;</td>
409 <td class="paramname"><em>out_stride_y</em>, </td>
410 </tr>
411 <tr>
412 <td class="paramkey"></td>
413 <td></td>
414 <td class="paramtype">uint&#160;</td>
415 <td class="paramname"><em>out_step_y</em>, </td>
416 </tr>
417 <tr>
418 <td class="paramkey"></td>
419 <td></td>
420 <td class="paramtype">uint&#160;</td>
421 <td class="paramname"><em>out_offset_first_element_in_bytes</em>, </td>
422 </tr>
423 <tr>
424 <td class="paramkey"></td>
425 <td></td>
426 <td class="paramtype">const int&#160;</td>
427 <td class="paramname"><em>width</em>, </td>
428 </tr>
429 <tr>
430 <td class="paramkey"></td>
431 <td></td>
432 <td class="paramtype">const int&#160;</td>
433 <td class="paramname"><em>height</em>&#160;</td>
434 </tr>
435 <tr>
436 <td></td>
437 <td>)</td>
438 <td></td><td></td>
439 </tr>
440 </table>
441</div><div class="memdoc">
442
443<p>Performs an affine transform on an image interpolating with the NEAREAST NEIGHBOUR method. </p>
444<p>Input and output are single channel U8.</p>
445<p>This kernel performs an affine transform with a 2x3 Matrix M with this method of pixel coordinate translation: x0 = M[1][1] * x + M[1][2] * y + M[1][3] y0 = M[2][1] * x + M[2][2] * y + M[2][3] output(x,y) = input(x0,y0)</p>
Anthony Barbier8140e1e2017-12-14 23:48:46 +0000[diff] [blame]446<dl class="section attention"><dt>Attention</dt><dd>The matrix coefficients need to be passed at compile time:<br />
447const char build_options [] = "-DMAT0=1 -DMAT1=2 -DMAT2=1 -DMAT3=2 -DMAT4=4 -DMAT5=2 "<br />
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]448clBuildProgram( program, 0, NULL, build_options, NULL, NULL);</dd></dl>
449<dl class="params"><dt>Parameters</dt><dd>
450 <table class="params">
451 <tr><td class="paramdir">[in]</td><td class="paramname">in_ptr</td><td>Pointer to the source image. Supported data types: U8. </td></tr>
452 <tr><td class="paramdir">[in]</td><td class="paramname">in_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr>
453 <tr><td class="paramdir">[in]</td><td class="paramname">in_step_x</td><td>in_stride_x * number of elements along X processed per work item (in bytes) </td></tr>
454 <tr><td class="paramdir">[in]</td><td class="paramname">in_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr>
455 <tr><td class="paramdir">[in]</td><td class="paramname">in_step_y</td><td>in_stride_y * number of elements along Y processed per work item (in bytes) </td></tr>
456 <tr><td class="paramdir">[in]</td><td class="paramname">in_offset_first_element_in_bytes</td><td>Offset of the first element in the source image </td></tr>
457 <tr><td class="paramdir">[out]</td><td class="paramname">out_ptr</td><td>Pointer to the destination image. Supported data types: U8. </td></tr>
458 <tr><td class="paramdir">[in]</td><td class="paramname">out_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
459 <tr><td class="paramdir">[in]</td><td class="paramname">out_step_x</td><td>out_stride_x * number of elements along X processed per work item (in bytes) </td></tr>
460 <tr><td class="paramdir">[in]</td><td class="paramname">out_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
461 <tr><td class="paramdir">[in]</td><td class="paramname">out_step_y</td><td>out_stride_y * number of elements along Y processed per work item (in bytes) </td></tr>
462 <tr><td class="paramdir">[in]</td><td class="paramname">out_offset_first_element_in_bytes</td><td>Offset of the first element in the destination image </td></tr>
463 <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>Width of the destination image </td></tr>
464 <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the destination image </td></tr>
465 </table>
466 </dd>
467</dl>
468
Jenkinsb9abeae2018-11-22 11:58:08 +0000[diff] [blame]469<p class="definition">Definition at line <a class="el" href="warp__affine_8cl_source.xhtml#l00079">79</a> of file <a class="el" href="warp__affine_8cl_source.xhtml">warp_affine.cl</a>.</p>
Jenkins975dfe12019-09-02 11:47:54 +0100[diff] [blame^]470<div class="fragment"><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;{</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <a class="code" href="struct_image.xhtml">Image</a> in = <a class="code" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(in);</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <a class="code" href="struct_image.xhtml">Image</a> out = <a class="code" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(out);</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; vstore4(<a class="code" href="warp__helpers_8h.xhtml#aba42442a4c991cdbb52727fa370676f1">read_texels4</a>(&amp;in, convert_int8_rtn(<a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(<a class="code" href="warp__affine_8cl.xhtml#a78e971ccef9598f9545f344d3a90a312">apply_affine_transform</a>(<a class="code" href="warp__helpers_8h.xhtml#a4caaeeb51ea58015267a9974675226d1">get_current_coords</a>(), <a class="code" href="warp__affine_8cl.xhtml#aecca3f284d1acabfa6d1bd8905dc036e">build_affine_mtx</a>()), width, height))), 0, out.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;}</div><div class="ttc" id="src_2core_2_c_l_2cl__kernels_2_helpers_8h_xhtml_aebe814363556c244be043b13e7969197"><div class="ttname"><a href="src_2core_2_c_l_2cl__kernels_2_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="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00129">helpers.h:129</a></div></div>
Jenkins514be652019-02-28 12:25:18 +0000[diff] [blame]471<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#l00049">warp_helpers.h:49</a></div></div>
472<div class="ttc" id="warp__affine_8cl_xhtml_aecca3f284d1acabfa6d1bd8905dc036e"><div class="ttname"><a href="warp__affine_8cl.xhtml#aecca3f284d1acabfa6d1bd8905dc036e">build_affine_mtx</a></div><div class="ttdeci">const float8 build_affine_mtx()</div><div class="ttdoc">Returns a vector of floats contaning the matrix coefficients.</div><div class="ttdef"><b>Definition:</b> <a href="warp__affine_8cl_source.xhtml#l00028">warp_affine.cl:28</a></div></div>
Jenkins975dfe12019-09-02 11:47:54 +0100[diff] [blame^]473<div class="ttc" id="src_2core_2_c_l_2cl__kernels_2_helpers_8h_xhtml_a4334a4a76f8e9628c0fb9e1acf616e2a"><div class="ttname"><a href="src_2core_2_c_l_2cl__kernels_2_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="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00132">helpers.h:132</a></div></div>
474<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="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00167">helpers.h:167</a></div></div>
475<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="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00169">helpers.h:169</a></div></div>
Jenkins514be652019-02-28 12:25:18 +0000[diff] [blame]476<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#l00059">warp_helpers.h:59</a></div></div>
477<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#l00068">warp_helpers.h:68</a></div></div>
478<div class="ttc" id="warp__affine_8cl_xhtml_a78e971ccef9598f9545f344d3a90a312"><div class="ttname"><a href="warp__affine_8cl.xhtml#a78e971ccef9598f9545f344d3a90a312">apply_affine_transform</a></div><div class="ttdeci">const float8 apply_affine_transform(const float2 coord, const float8 mtx)</div><div class="ttdoc">Transforms 4 2D coordinates using the formula:</div><div class="ttdef"><b>Definition:</b> <a href="warp__affine_8cl_source.xhtml#l00043">warp_affine.cl:43</a></div></div>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]479</div><!-- fragment -->
Jenkins975dfe12019-09-02 11:47:54 +0100[diff] [blame^]480<p class="reference">References <a class="el" href="warp__affine_8cl_source.xhtml#l00043">apply_affine_transform()</a>, <a class="el" href="warp__affine_8cl_source.xhtml#l00028">build_affine_mtx()</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00049">clamp_to_border()</a>, <a class="el" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00129">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00132">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00068">get_current_coords()</a>, <a class="el" href="src_2core_2_c_l_2cl__kernels_2_helpers_8h_source.xhtml#l00169">Image::ptr</a>, and <a class="el" href="warp__helpers_8h_source.xhtml#l00059">read_texels4()</a>.</p>
Jenkins514be652019-02-28 12:25:18 +0000[diff] [blame]481
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]482</div>
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Anthony Barbier8140e1e2017-12-14 23:48:46 +0000[diff] [blame]489 <li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.xhtml">src</a></li><li class="navelem"><a class="el" href="dir_aebb8dcc11953d78e620bbef0b9e2183.xhtml">core</a></li><li class="navelem"><a class="el" href="dir_8c278f79c760e5c5fbd911f9870614c1.xhtml">CL</a></li><li class="navelem"><a class="el" href="dir_25885286e9dad4fa105b7b25a8031bbf.xhtml">cl_kernels</a></li><li class="navelem"><a class="el" href="warp__affine_8cl.xhtml">warp_affine.cl</a></li>
Jenkins975dfe12019-09-02 11:47:54 +0100[diff] [blame^]490 <li class="footer">Generated on Mon Sep 2 2019 11:47:29 for Compute Library by
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Jenkins514be652019-02-28 12:25:18 +0000[diff] [blame]492 <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.15 </li>
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