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gerrit-public.fairphone.software / platform / external / ComputeLibrary / 8a3da6f91f90c566b844d568f4ec43b946915af8 / . / documentation / warp__affine_8cl.xhtml
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117<div class="title">warp_affine.cl File Reference</div> </div>
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119<div class="contents">
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]120<div class="textblock"><code>#include &quot;<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>&quot;</code><br/>
121<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]122</div>
123<p><a href="warp__affine_8cl_source.xhtml">Go to the source code of this file.</a></p>
124<table class="memberdecls">
125<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
126Functions</h2></td></tr>
127<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]128<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]129<tr class="separator:aecca3f284d1acabfa6d1bd8905dc036e"><td class="memSeparator" colspan="2">&#160;</td></tr>
130<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]131<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]132<tr class="separator:a78e971ccef9598f9545f344d3a90a312"><td class="memSeparator" colspan="2">&#160;</td></tr>
133<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 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)</td></tr>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]134<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]135<tr class="separator:a716ebd98bb81a3addb7f4d769e118dd9"><td class="memSeparator" colspan="2">&#160;</td></tr>
136<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 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)</td></tr>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]137<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]138<tr class="separator:a4a77d9bbbc01353083729a076cedc38c"><td class="memSeparator" colspan="2">&#160;</td></tr>
139</table>
140<h2 class="groupheader">Function Documentation</h2>
141<a class="anchor" id="a78e971ccef9598f9545f344d3a90a312"></a>
142<div class="memitem">
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144<table class="mlabels">
145 <tr>
146 <td class="mlabels-left">
147 <table class="memname">
148 <tr>
149 <td class="memname">const float8 apply_affine_transform </td>
150 <td>(</td>
151 <td class="paramtype">const float2&#160;</td>
152 <td class="paramname"><em>coord</em>, </td>
153 </tr>
154 <tr>
155 <td class="paramkey"></td>
156 <td></td>
157 <td class="paramtype">const float8&#160;</td>
158 <td class="paramname"><em>mtx</em>&#160;</td>
159 </tr>
160 <tr>
161 <td></td>
162 <td>)</td>
163 <td></td><td></td>
164 </tr>
165 </table>
166 </td>
167 <td class="mlabels-right">
168<span class="mlabels"><span class="mlabel">inline</span></span> </td>
169 </tr>
170</table>
171</div><div class="memdoc">
172
173<p>Transforms 4 2D coordinates using the formula: </p>
174<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>
175<dl class="params"><dt>Parameters</dt><dd>
176 <table class="params">
177 <tr><td class="paramdir">[in]</td><td class="paramname">coord</td><td>2D coordinate to transform. </td></tr>
178 <tr><td class="paramdir">[in]</td><td class="paramname">mtx</td><td>affine matrix</td></tr>
179 </table>
180 </dd>
181</dl>
182<dl class="section return"><dt>Returns</dt><dd>a int8 containing 4 2D transformed values. </dd></dl>
183
184<p>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>
185
186<p>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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]187<div class="fragment"><div class="line"><a name="l00044"></a><span class="lineno"> 44</span>&#160;{</div>
188<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>
189<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>
190<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>
191<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>
192<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>
193<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>
194<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;}</div>
195</div><!-- fragment -->
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]196</div>
197</div>
198<a class="anchor" id="aecca3f284d1acabfa6d1bd8905dc036e"></a>
199<div class="memitem">
200<div class="memproto">
201<table class="mlabels">
202 <tr>
203 <td class="mlabels-left">
204 <table class="memname">
205 <tr>
206 <td class="memname">const float8 build_affine_mtx </td>
207 <td>(</td>
208 <td class="paramname"></td><td>)</td>
209 <td></td>
210 </tr>
211 </table>
212 </td>
213 <td class="mlabels-right">
214<span class="mlabels"><span class="mlabel">inline</span></span> </td>
215 </tr>
216</table>
217</div><div class="memdoc">
218
219<p>Returns a vector of floats contaning the matrix coefficients. </p>
220
221<p>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>
222
223<p>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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]224<div class="fragment"><div class="line"><a name="l00029"></a><span class="lineno"> 29</span>&#160;{</div>
225<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>
226<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>&#160;}</div>
227</div><!-- fragment -->
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]228</div>
229</div>
230<a class="anchor" id="a4a77d9bbbc01353083729a076cedc38c"></a>
231<div class="memitem">
232<div class="memproto">
233 <table class="memname">
234 <tr>
235 <td class="memname">__kernel void warp_affine_bilinear </td>
236 <td>(</td>
237 <td class="paramtype">__global uchar *&#160;</td>
238 <td class="paramname"><em>in_ptr</em>, </td>
239 </tr>
240 <tr>
241 <td class="paramkey"></td>
242 <td></td>
243 <td class="paramtype">uint&#160;</td>
244 <td class="paramname"><em>in_stride_x</em>, </td>
245 </tr>
246 <tr>
247 <td class="paramkey"></td>
248 <td></td>
249 <td class="paramtype">uint&#160;</td>
250 <td class="paramname"><em>in_step_x</em>, </td>
251 </tr>
252 <tr>
253 <td class="paramkey"></td>
254 <td></td>
255 <td class="paramtype">uint&#160;</td>
256 <td class="paramname"><em>in_stride_y</em>, </td>
257 </tr>
258 <tr>
259 <td class="paramkey"></td>
260 <td></td>
261 <td class="paramtype">uint&#160;</td>
262 <td class="paramname"><em>in_step_y</em>, </td>
263 </tr>
264 <tr>
265 <td class="paramkey"></td>
266 <td></td>
267 <td class="paramtype">uint&#160;</td>
268 <td class="paramname"><em>in_offset_first_element_in_bytes</em>, </td>
269 </tr>
270 <tr>
271 <td class="paramkey"></td>
272 <td></td>
273 <td class="paramtype">__global uchar *&#160;</td>
274 <td class="paramname"><em>out_ptr</em>, </td>
275 </tr>
276 <tr>
277 <td class="paramkey"></td>
278 <td></td>
279 <td class="paramtype">uint&#160;</td>
280 <td class="paramname"><em>out_stride_x</em>, </td>
281 </tr>
282 <tr>
283 <td class="paramkey"></td>
284 <td></td>
285 <td class="paramtype">uint&#160;</td>
286 <td class="paramname"><em>out_step_x</em>, </td>
287 </tr>
288 <tr>
289 <td class="paramkey"></td>
290 <td></td>
291 <td class="paramtype">uint&#160;</td>
292 <td class="paramname"><em>out_stride_y</em>, </td>
293 </tr>
294 <tr>
295 <td class="paramkey"></td>
296 <td></td>
297 <td class="paramtype">uint&#160;</td>
298 <td class="paramname"><em>out_step_y</em>, </td>
299 </tr>
300 <tr>
301 <td class="paramkey"></td>
302 <td></td>
303 <td class="paramtype">uint&#160;</td>
304 <td class="paramname"><em>out_offset_first_element_in_bytes</em>, </td>
305 </tr>
306 <tr>
307 <td class="paramkey"></td>
308 <td></td>
309 <td class="paramtype">const int&#160;</td>
310 <td class="paramname"><em>width</em>, </td>
311 </tr>
312 <tr>
313 <td class="paramkey"></td>
314 <td></td>
315 <td class="paramtype">const int&#160;</td>
316 <td class="paramname"><em>height</em>&#160;</td>
317 </tr>
318 <tr>
319 <td></td>
320 <td>)</td>
321 <td></td><td></td>
322 </tr>
323 </table>
324</div><div class="memdoc">
325
326<p>Performs an affine transform on an image interpolating with the BILINEAR method. </p>
327<p>Input and output are single channel U8.</p>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]328<dl class="section attention"><dt>Attention</dt><dd>The matrix coefficients need to be passed at compile time:<br/>
329const 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]330clBuildProgram( program, 0, NULL, build_options, NULL, NULL);</dd></dl>
331<dl class="params"><dt>Parameters</dt><dd>
332 <table class="params">
333 <tr><td class="paramdir">[in]</td><td class="paramname">in_ptr</td><td>Pointer to the source image. Supported data types: U8. </td></tr>
334 <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>
335 <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>
336 <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>
337 <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>
338 <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>
339 <tr><td class="paramdir">[out]</td><td class="paramname">out_ptr</td><td>Pointer to the destination image. Supported data types: U8. </td></tr>
340 <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>
341 <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>
342 <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>
343 <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>
344 <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>
345 <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>Width of the destination image </td></tr>
346 <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the destination image </td></tr>
347 </table>
348 </dd>
349</dl>
350
351<p>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>
352
Kaizenbf8b01d2017-10-12 14:26:51 +0100[diff] [blame]353<p>References <a class="el" href="warp__affine_8cl_source.xhtml#l00043">apply_affine_transform()</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00080">bilinear_interpolate()</a>, <a class="el" href="warp__affine_8cl_source.xhtml#l00028">build_affine_mtx()</a>, <a class="el" href="helpers_8h_source.xhtml#l00096">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="helpers_8h_source.xhtml#l00099">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00054">get_current_coords()</a>, and <a class="el" href="helpers_8h_source.xhtml#l00136">Image::ptr</a>.</p>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]354<div class="fragment"><div class="line"><a name="l00116"></a><span class="lineno"> 116</span>&#160;{</div>
355<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="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(in);</div>
356<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="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(out);</div>
Kaizenbf8b01d2017-10-12 14:26:51 +0100[diff] [blame]357<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]358<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;}</div>
Kaizenbf8b01d2017-10-12 14:26:51 +0100[diff] [blame]359<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#l00099">helpers.h:99</a></div></div>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]360<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>
Kaizenbf8b01d2017-10-12 14:26:51 +0100[diff] [blame]361<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#l00096">helpers.h:96</a></div></div>
362<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#l00134">helpers.h:134</a></div></div>
363<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#l00136">helpers.h:136</a></div></div>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]364<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>
365<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>
366<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>
367</div><!-- fragment -->
368</div>
369</div>
370<a class="anchor" id="a716ebd98bb81a3addb7f4d769e118dd9"></a>
371<div class="memitem">
372<div class="memproto">
373 <table class="memname">
374 <tr>
375 <td class="memname">__kernel void warp_affine_nearest_neighbour </td>
376 <td>(</td>
377 <td class="paramtype">__global uchar *&#160;</td>
378 <td class="paramname"><em>in_ptr</em>, </td>
379 </tr>
380 <tr>
381 <td class="paramkey"></td>
382 <td></td>
383 <td class="paramtype">uint&#160;</td>
384 <td class="paramname"><em>in_stride_x</em>, </td>
385 </tr>
386 <tr>
387 <td class="paramkey"></td>
388 <td></td>
389 <td class="paramtype">uint&#160;</td>
390 <td class="paramname"><em>in_step_x</em>, </td>
391 </tr>
392 <tr>
393 <td class="paramkey"></td>
394 <td></td>
395 <td class="paramtype">uint&#160;</td>
396 <td class="paramname"><em>in_stride_y</em>, </td>
397 </tr>
398 <tr>
399 <td class="paramkey"></td>
400 <td></td>
401 <td class="paramtype">uint&#160;</td>
402 <td class="paramname"><em>in_step_y</em>, </td>
403 </tr>
404 <tr>
405 <td class="paramkey"></td>
406 <td></td>
407 <td class="paramtype">uint&#160;</td>
408 <td class="paramname"><em>in_offset_first_element_in_bytes</em>, </td>
409 </tr>
410 <tr>
411 <td class="paramkey"></td>
412 <td></td>
413 <td class="paramtype">__global uchar *&#160;</td>
414 <td class="paramname"><em>out_ptr</em>, </td>
415 </tr>
416 <tr>
417 <td class="paramkey"></td>
418 <td></td>
419 <td class="paramtype">uint&#160;</td>
420 <td class="paramname"><em>out_stride_x</em>, </td>
421 </tr>
422 <tr>
423 <td class="paramkey"></td>
424 <td></td>
425 <td class="paramtype">uint&#160;</td>
426 <td class="paramname"><em>out_step_x</em>, </td>
427 </tr>
428 <tr>
429 <td class="paramkey"></td>
430 <td></td>
431 <td class="paramtype">uint&#160;</td>
432 <td class="paramname"><em>out_stride_y</em>, </td>
433 </tr>
434 <tr>
435 <td class="paramkey"></td>
436 <td></td>
437 <td class="paramtype">uint&#160;</td>
438 <td class="paramname"><em>out_step_y</em>, </td>
439 </tr>
440 <tr>
441 <td class="paramkey"></td>
442 <td></td>
443 <td class="paramtype">uint&#160;</td>
444 <td class="paramname"><em>out_offset_first_element_in_bytes</em>, </td>
445 </tr>
446 <tr>
447 <td class="paramkey"></td>
448 <td></td>
449 <td class="paramtype">const int&#160;</td>
450 <td class="paramname"><em>width</em>, </td>
451 </tr>
452 <tr>
453 <td class="paramkey"></td>
454 <td></td>
455 <td class="paramtype">const int&#160;</td>
456 <td class="paramname"><em>height</em>&#160;</td>
457 </tr>
458 <tr>
459 <td></td>
460 <td>)</td>
461 <td></td><td></td>
462 </tr>
463 </table>
464</div><div class="memdoc">
465
466<p>Performs an affine transform on an image interpolating with the NEAREAST NEIGHBOUR method. </p>
467<p>Input and output are single channel U8.</p>
468<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]469<dl class="section attention"><dt>Attention</dt><dd>The matrix coefficients need to be passed at compile time:<br/>
470const 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]471clBuildProgram( program, 0, NULL, build_options, NULL, NULL);</dd></dl>
472<dl class="params"><dt>Parameters</dt><dd>
473 <table class="params">
474 <tr><td class="paramdir">[in]</td><td class="paramname">in_ptr</td><td>Pointer to the source image. Supported data types: U8. </td></tr>
475 <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>
476 <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>
477 <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>
478 <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>
479 <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>
480 <tr><td class="paramdir">[out]</td><td class="paramname">out_ptr</td><td>Pointer to the destination image. Supported data types: U8. </td></tr>
481 <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>
482 <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>
483 <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>
484 <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>
485 <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>
486 <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>Width of the destination image </td></tr>
487 <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the destination image </td></tr>
488 </table>
489 </dd>
490</dl>
491
492<p>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>
493
Kaizenbf8b01d2017-10-12 14:26:51 +0100[diff] [blame]494<p>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#l00033">clamp_to_border()</a>, <a class="el" href="helpers_8h_source.xhtml#l00096">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="helpers_8h_source.xhtml#l00099">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00054">get_current_coords()</a>, <a class="el" href="helpers_8h_source.xhtml#l00136">Image::ptr</a>, and <a class="el" href="warp__helpers_8h_source.xhtml#l00045">read_texels4()</a>.</p>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]495<div class="fragment"><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>&#160;{</div>
496<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="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(in);</div>
497<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="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(out);</div>
Kaizenbf8b01d2017-10-12 14:26:51 +0100[diff] [blame]498<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]499<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160;}</div>
500<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>
Kaizenbf8b01d2017-10-12 14:26:51 +0100[diff] [blame]501<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#l00099">helpers.h:99</a></div></div>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]502<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>
Kaizenbf8b01d2017-10-12 14:26:51 +0100[diff] [blame]503<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#l00096">helpers.h:96</a></div></div>
504<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#l00134">helpers.h:134</a></div></div>
505<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#l00136">helpers.h:136</a></div></div>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]506<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>
507<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>
508<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>
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Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]517 <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__affine_8cl.xhtml">warp_affine.cl</a></li>
Kaizenbf8b01d2017-10-12 14:26:51 +0100[diff] [blame]518 <li class="footer">Generated on Thu Oct 12 2017 14:26:35 for Compute Library by
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]519 <a href="http://www.doxygen.org/index.html">
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame]520 <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.6 </li>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]521 </ul>
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