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gerrit-public.fairphone.software / platform / external / ComputeLibrary / f4a254c2745aeaab6f7276a675147d707002fe7a / . / documentation / remap_8cl.xhtml
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Anthony Barbierdbdab852017-06-23 15:42:00 +0100[diff] [blame]9<title>Compute Library: src/core/CL/cl_kernels/remap.cl File Reference</title>
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Anthony Barbierdbdab852017-06-23 15:42:00 +0100[diff] [blame]42 <div id="projectname">Compute Library
43 &#160;<span id="projectnumber">v17.06</span>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]44 </div>
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117<a href="#func-members">Functions</a> </div>
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119<div class="title">remap.cl File Reference</div> </div>
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121<div class="contents">
122<div class="textblock"><code>#include &quot;<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>&quot;</code><br />
123<code>#include &quot;<a class="el" href="warp__helpers_8h_source.xhtml">warp_helpers.h</a>&quot;</code><br />
124</div>
125<p><a href="remap_8cl_source.xhtml">Go to the source code of this file.</a></p>
126<table class="memberdecls">
127<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
128Functions</h2></td></tr>
129<tr class="memitem:a786803611cc128275d32d9584376713e"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="remap_8cl.xhtml#a786803611cc128275d32d9584376713e">remap_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, __global uchar *mapx_ptr, uint mapx_stride_x, uint mapx_step_x, uint mapx_stride_y, uint mapx_step_y, uint mapx_offset_first_element_in_bytes, __global uchar *mapy_ptr, uint mapy_stride_x, uint mapy_step_x, uint mapy_stride_y, uint mapy_step_y, uint mapy_offset_first_element_in_bytes, const float width, const float height)</td></tr>
130<tr class="memdesc:a786803611cc128275d32d9584376713e"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs a remapping of an input image to an output given two remapping image using nearest neighbor as interpolation. <a href="#a786803611cc128275d32d9584376713e">More...</a><br /></td></tr>
131<tr class="separator:a786803611cc128275d32d9584376713e"><td class="memSeparator" colspan="2">&#160;</td></tr>
132<tr class="memitem:a1d771133d1dfea450fdbacda1c34ce49"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="remap_8cl.xhtml#a1d771133d1dfea450fdbacda1c34ce49">remap_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, __global uchar *mapx_ptr, uint mapx_stride_x, uint mapx_step_x, uint mapx_stride_y, uint mapx_step_y, uint mapx_offset_first_element_in_bytes, __global uchar *mapy_ptr, uint mapy_stride_x, uint mapy_step_x, uint mapy_stride_y, uint mapy_step_y, uint mapy_offset_first_element_in_bytes, const float width, const float height)</td></tr>
133<tr class="memdesc:a1d771133d1dfea450fdbacda1c34ce49"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs a remapping of an input image to an output given two remapping image using bilinear as interpolation. <a href="#a1d771133d1dfea450fdbacda1c34ce49">More...</a><br /></td></tr>
134<tr class="separator:a1d771133d1dfea450fdbacda1c34ce49"><td class="memSeparator" colspan="2">&#160;</td></tr>
135</table>
136<h2 class="groupheader">Function Documentation</h2>
137<a class="anchor" id="a1d771133d1dfea450fdbacda1c34ce49"></a>
138<div class="memitem">
139<div class="memproto">
140 <table class="memname">
141 <tr>
142 <td class="memname">__kernel void remap_bilinear </td>
143 <td>(</td>
144 <td class="paramtype">__global uchar *&#160;</td>
145 <td class="paramname"><em>in_ptr</em>, </td>
146 </tr>
147 <tr>
148 <td class="paramkey"></td>
149 <td></td>
150 <td class="paramtype">uint&#160;</td>
151 <td class="paramname"><em>in_stride_x</em>, </td>
152 </tr>
153 <tr>
154 <td class="paramkey"></td>
155 <td></td>
156 <td class="paramtype">uint&#160;</td>
157 <td class="paramname"><em>in_step_x</em>, </td>
158 </tr>
159 <tr>
160 <td class="paramkey"></td>
161 <td></td>
162 <td class="paramtype">uint&#160;</td>
163 <td class="paramname"><em>in_stride_y</em>, </td>
164 </tr>
165 <tr>
166 <td class="paramkey"></td>
167 <td></td>
168 <td class="paramtype">uint&#160;</td>
169 <td class="paramname"><em>in_step_y</em>, </td>
170 </tr>
171 <tr>
172 <td class="paramkey"></td>
173 <td></td>
174 <td class="paramtype">uint&#160;</td>
175 <td class="paramname"><em>in_offset_first_element_in_bytes</em>, </td>
176 </tr>
177 <tr>
178 <td class="paramkey"></td>
179 <td></td>
180 <td class="paramtype">__global uchar *&#160;</td>
181 <td class="paramname"><em>out_ptr</em>, </td>
182 </tr>
183 <tr>
184 <td class="paramkey"></td>
185 <td></td>
186 <td class="paramtype">uint&#160;</td>
187 <td class="paramname"><em>out_stride_x</em>, </td>
188 </tr>
189 <tr>
190 <td class="paramkey"></td>
191 <td></td>
192 <td class="paramtype">uint&#160;</td>
193 <td class="paramname"><em>out_step_x</em>, </td>
194 </tr>
195 <tr>
196 <td class="paramkey"></td>
197 <td></td>
198 <td class="paramtype">uint&#160;</td>
199 <td class="paramname"><em>out_stride_y</em>, </td>
200 </tr>
201 <tr>
202 <td class="paramkey"></td>
203 <td></td>
204 <td class="paramtype">uint&#160;</td>
205 <td class="paramname"><em>out_step_y</em>, </td>
206 </tr>
207 <tr>
208 <td class="paramkey"></td>
209 <td></td>
210 <td class="paramtype">uint&#160;</td>
211 <td class="paramname"><em>out_offset_first_element_in_bytes</em>, </td>
212 </tr>
213 <tr>
214 <td class="paramkey"></td>
215 <td></td>
216 <td class="paramtype">__global uchar *&#160;</td>
217 <td class="paramname"><em>mapx_ptr</em>, </td>
218 </tr>
219 <tr>
220 <td class="paramkey"></td>
221 <td></td>
222 <td class="paramtype">uint&#160;</td>
223 <td class="paramname"><em>mapx_stride_x</em>, </td>
224 </tr>
225 <tr>
226 <td class="paramkey"></td>
227 <td></td>
228 <td class="paramtype">uint&#160;</td>
229 <td class="paramname"><em>mapx_step_x</em>, </td>
230 </tr>
231 <tr>
232 <td class="paramkey"></td>
233 <td></td>
234 <td class="paramtype">uint&#160;</td>
235 <td class="paramname"><em>mapx_stride_y</em>, </td>
236 </tr>
237 <tr>
238 <td class="paramkey"></td>
239 <td></td>
240 <td class="paramtype">uint&#160;</td>
241 <td class="paramname"><em>mapx_step_y</em>, </td>
242 </tr>
243 <tr>
244 <td class="paramkey"></td>
245 <td></td>
246 <td class="paramtype">uint&#160;</td>
247 <td class="paramname"><em>mapx_offset_first_element_in_bytes</em>, </td>
248 </tr>
249 <tr>
250 <td class="paramkey"></td>
251 <td></td>
252 <td class="paramtype">__global uchar *&#160;</td>
253 <td class="paramname"><em>mapy_ptr</em>, </td>
254 </tr>
255 <tr>
256 <td class="paramkey"></td>
257 <td></td>
258 <td class="paramtype">uint&#160;</td>
259 <td class="paramname"><em>mapy_stride_x</em>, </td>
260 </tr>
261 <tr>
262 <td class="paramkey"></td>
263 <td></td>
264 <td class="paramtype">uint&#160;</td>
265 <td class="paramname"><em>mapy_step_x</em>, </td>
266 </tr>
267 <tr>
268 <td class="paramkey"></td>
269 <td></td>
270 <td class="paramtype">uint&#160;</td>
271 <td class="paramname"><em>mapy_stride_y</em>, </td>
272 </tr>
273 <tr>
274 <td class="paramkey"></td>
275 <td></td>
276 <td class="paramtype">uint&#160;</td>
277 <td class="paramname"><em>mapy_step_y</em>, </td>
278 </tr>
279 <tr>
280 <td class="paramkey"></td>
281 <td></td>
282 <td class="paramtype">uint&#160;</td>
283 <td class="paramname"><em>mapy_offset_first_element_in_bytes</em>, </td>
284 </tr>
285 <tr>
286 <td class="paramkey"></td>
287 <td></td>
288 <td class="paramtype">const float&#160;</td>
289 <td class="paramname"><em>width</em>, </td>
290 </tr>
291 <tr>
292 <td class="paramkey"></td>
293 <td></td>
294 <td class="paramtype">const float&#160;</td>
295 <td class="paramname"><em>height</em>&#160;</td>
296 </tr>
297 <tr>
298 <td></td>
299 <td>)</td>
300 <td></td><td></td>
301 </tr>
302 </table>
303</div><div class="memdoc">
304
305<p>Performs a remapping of an input image to an output given two remapping image using bilinear as interpolation. </p>
306<p>This kernel performs remapping with this method of pixel coordinate translation: out(x,y) = in(mapx(x,y), mapy(x,y));</p>
307<dl class="params"><dt>Parameters</dt><dd>
308 <table class="params">
309 <tr><td class="paramdir">[in]</td><td class="paramname">in_ptr</td><td>Pointer to the source image. Supported data types: U8. </td></tr>
310 <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>
311 <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>
312 <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>
313 <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>
314 <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>
315 <tr><td class="paramdir">[out]</td><td class="paramname">out_ptr</td><td>Pointer to the destination image. Supported data types: U8. </td></tr>
316 <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>
317 <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>
318 <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>
319 <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>
320 <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>
321 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_ptr</td><td>Pointer to the x remapping image. Supported data types: F32. </td></tr>
322 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_stride_x</td><td>Stride of the remapping image in X dimension (in bytes) </td></tr>
323 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_step_x</td><td>mapx_stride_x * number of elements along X processed per work item (in bytes) </td></tr>
324 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_stride_y</td><td>Stride of the remapping image in Y dimension (in bytes) </td></tr>
325 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_step_y</td><td>mapy_stride_y * number of elements along Y processed per work item (in bytes) </td></tr>
326 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_offset_first_element_in_bytes</td><td>Offset of the first element in the remapping image </td></tr>
327 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_ptr</td><td>Pointer to the x remapping image. Supported data types: F32. </td></tr>
328 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_stride_x</td><td>Stride of the remapping image in X dimension (in bytes) </td></tr>
329 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_step_x</td><td>mapy_stride_x * number of elements along X processed per work item (in bytes) </td></tr>
330 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_stride_y</td><td>Stride of the remapping image in Y dimension (in bytes) </td></tr>
331 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_step_y</td><td>mapy_stride_y * number of elements along Y processed per work item (in bytes) </td></tr>
332 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_offset_first_element_in_bytes</td><td>Offset of the first element in the remapping image </td></tr>
333 <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>Width of the input image </td></tr>
334 <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the input image </td></tr>
335 </table>
336 </dd>
337</dl>
338
339<p>Definition at line <a class="el" href="remap_8cl_source.xhtml#l00113">113</a> of file <a class="el" href="remap_8cl_source.xhtml">remap.cl</a>.</p>
340
341<p>References <a class="el" href="warp__helpers_8h_source.xhtml#l00080">bilinear_interpolate()</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00033">clamp_to_border()</a>, <a class="el" href="helpers_8h_source.xhtml#l00073">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="helpers_8h_source.xhtml#l00076">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>, and <a class="el" href="helpers_8h_source.xhtml#l00097">Image::ptr</a>.</p>
342<div class="fragment"><div class="line"><a name="l00120"></a><span class="lineno"> 120</span>&#160;{</div><div class="line"><a name="l00121"></a><span class="lineno"> 121</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="l00122"></a><span class="lineno"> 122</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="l00123"></a><span class="lineno"> 123</span>&#160; <a class="code" href="struct_image.xhtml">Image</a> mapx = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(mapx);</div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span>&#160; <a class="code" href="struct_image.xhtml">Image</a> mapy = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(mapy);</div><div class="line"><a name="l00125"></a><span class="lineno"> 125</span>&#160;</div><div class="line"><a name="l00126"></a><span class="lineno"> 126</span>&#160; float4 mapx_coords = vload4(0, (__global <span class="keywordtype">float</span> *)mapx.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00127"></a><span class="lineno"> 127</span>&#160; float4 mapy_coords = vload4(0, (__global <span class="keywordtype">float</span> *)mapy.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00128"></a><span class="lineno"> 128</span>&#160; float8 map_coords = (float8)(mapx_coords.s0, mapy_coords.s0, mapx_coords.s1, mapy_coords.s1,</div><div class="line"><a name="l00129"></a><span class="lineno"> 129</span>&#160; mapx_coords.s2, mapy_coords.s2, mapx_coords.s3, mapy_coords.s3);</div><div class="line"><a name="l00130"></a><span class="lineno"> 130</span>&#160;</div><div class="line"><a name="l00131"></a><span class="lineno"> 131</span>&#160; vstore4(<a class="code" href="warp__helpers_8h.xhtml#abea9f226daf3e0ad741d03cf7417d353">bilinear_interpolate</a>(&amp;in, <a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(map_coords, width, height), width, height), 0, out.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00132"></a><span class="lineno"> 132</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>
343<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>
344<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>
345<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>
346<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>
347<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>
348</div><!-- fragment -->
349</div>
350</div>
351<a class="anchor" id="a786803611cc128275d32d9584376713e"></a>
352<div class="memitem">
353<div class="memproto">
354 <table class="memname">
355 <tr>
356 <td class="memname">__kernel void remap_nearest_neighbour </td>
357 <td>(</td>
358 <td class="paramtype">__global uchar *&#160;</td>
359 <td class="paramname"><em>in_ptr</em>, </td>
360 </tr>
361 <tr>
362 <td class="paramkey"></td>
363 <td></td>
364 <td class="paramtype">uint&#160;</td>
365 <td class="paramname"><em>in_stride_x</em>, </td>
366 </tr>
367 <tr>
368 <td class="paramkey"></td>
369 <td></td>
370 <td class="paramtype">uint&#160;</td>
371 <td class="paramname"><em>in_step_x</em>, </td>
372 </tr>
373 <tr>
374 <td class="paramkey"></td>
375 <td></td>
376 <td class="paramtype">uint&#160;</td>
377 <td class="paramname"><em>in_stride_y</em>, </td>
378 </tr>
379 <tr>
380 <td class="paramkey"></td>
381 <td></td>
382 <td class="paramtype">uint&#160;</td>
383 <td class="paramname"><em>in_step_y</em>, </td>
384 </tr>
385 <tr>
386 <td class="paramkey"></td>
387 <td></td>
388 <td class="paramtype">uint&#160;</td>
389 <td class="paramname"><em>in_offset_first_element_in_bytes</em>, </td>
390 </tr>
391 <tr>
392 <td class="paramkey"></td>
393 <td></td>
394 <td class="paramtype">__global uchar *&#160;</td>
395 <td class="paramname"><em>out_ptr</em>, </td>
396 </tr>
397 <tr>
398 <td class="paramkey"></td>
399 <td></td>
400 <td class="paramtype">uint&#160;</td>
401 <td class="paramname"><em>out_stride_x</em>, </td>
402 </tr>
403 <tr>
404 <td class="paramkey"></td>
405 <td></td>
406 <td class="paramtype">uint&#160;</td>
407 <td class="paramname"><em>out_step_x</em>, </td>
408 </tr>
409 <tr>
410 <td class="paramkey"></td>
411 <td></td>
412 <td class="paramtype">uint&#160;</td>
413 <td class="paramname"><em>out_stride_y</em>, </td>
414 </tr>
415 <tr>
416 <td class="paramkey"></td>
417 <td></td>
418 <td class="paramtype">uint&#160;</td>
419 <td class="paramname"><em>out_step_y</em>, </td>
420 </tr>
421 <tr>
422 <td class="paramkey"></td>
423 <td></td>
424 <td class="paramtype">uint&#160;</td>
425 <td class="paramname"><em>out_offset_first_element_in_bytes</em>, </td>
426 </tr>
427 <tr>
428 <td class="paramkey"></td>
429 <td></td>
430 <td class="paramtype">__global uchar *&#160;</td>
431 <td class="paramname"><em>mapx_ptr</em>, </td>
432 </tr>
433 <tr>
434 <td class="paramkey"></td>
435 <td></td>
436 <td class="paramtype">uint&#160;</td>
437 <td class="paramname"><em>mapx_stride_x</em>, </td>
438 </tr>
439 <tr>
440 <td class="paramkey"></td>
441 <td></td>
442 <td class="paramtype">uint&#160;</td>
443 <td class="paramname"><em>mapx_step_x</em>, </td>
444 </tr>
445 <tr>
446 <td class="paramkey"></td>
447 <td></td>
448 <td class="paramtype">uint&#160;</td>
449 <td class="paramname"><em>mapx_stride_y</em>, </td>
450 </tr>
451 <tr>
452 <td class="paramkey"></td>
453 <td></td>
454 <td class="paramtype">uint&#160;</td>
455 <td class="paramname"><em>mapx_step_y</em>, </td>
456 </tr>
457 <tr>
458 <td class="paramkey"></td>
459 <td></td>
460 <td class="paramtype">uint&#160;</td>
461 <td class="paramname"><em>mapx_offset_first_element_in_bytes</em>, </td>
462 </tr>
463 <tr>
464 <td class="paramkey"></td>
465 <td></td>
466 <td class="paramtype">__global uchar *&#160;</td>
467 <td class="paramname"><em>mapy_ptr</em>, </td>
468 </tr>
469 <tr>
470 <td class="paramkey"></td>
471 <td></td>
472 <td class="paramtype">uint&#160;</td>
473 <td class="paramname"><em>mapy_stride_x</em>, </td>
474 </tr>
475 <tr>
476 <td class="paramkey"></td>
477 <td></td>
478 <td class="paramtype">uint&#160;</td>
479 <td class="paramname"><em>mapy_step_x</em>, </td>
480 </tr>
481 <tr>
482 <td class="paramkey"></td>
483 <td></td>
484 <td class="paramtype">uint&#160;</td>
485 <td class="paramname"><em>mapy_stride_y</em>, </td>
486 </tr>
487 <tr>
488 <td class="paramkey"></td>
489 <td></td>
490 <td class="paramtype">uint&#160;</td>
491 <td class="paramname"><em>mapy_step_y</em>, </td>
492 </tr>
493 <tr>
494 <td class="paramkey"></td>
495 <td></td>
496 <td class="paramtype">uint&#160;</td>
497 <td class="paramname"><em>mapy_offset_first_element_in_bytes</em>, </td>
498 </tr>
499 <tr>
500 <td class="paramkey"></td>
501 <td></td>
502 <td class="paramtype">const float&#160;</td>
503 <td class="paramname"><em>width</em>, </td>
504 </tr>
505 <tr>
506 <td class="paramkey"></td>
507 <td></td>
508 <td class="paramtype">const float&#160;</td>
509 <td class="paramname"><em>height</em>&#160;</td>
510 </tr>
511 <tr>
512 <td></td>
513 <td>)</td>
514 <td></td><td></td>
515 </tr>
516 </table>
517</div><div class="memdoc">
518
519<p>Performs a remapping of an input image to an output given two remapping image using nearest neighbor as interpolation. </p>
520<p>This kernel performs remapping with this method of pixel coordinate translation: out(x,y) = in(mapx(x,y), mapy(x,y));</p>
521<dl class="params"><dt>Parameters</dt><dd>
522 <table class="params">
523 <tr><td class="paramdir">[in]</td><td class="paramname">in_ptr</td><td>Pointer to the source image. Supported data types: U8. </td></tr>
524 <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>
525 <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>
526 <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>
527 <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>
528 <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>
529 <tr><td class="paramdir">[out]</td><td class="paramname">out_ptr</td><td>Pointer to the destination image. Supported data types: U8. </td></tr>
530 <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>
531 <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>
532 <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>
533 <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>
534 <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>
535 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_ptr</td><td>Pointer to the x remapping image. Supported data types: F32. </td></tr>
536 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_stride_x</td><td>Stride of the remapping image in X dimension (in bytes) </td></tr>
537 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_step_x</td><td>mapx_stride_x * number of elements along X processed per work item (in bytes) </td></tr>
538 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_stride_y</td><td>Stride of the remapping image in Y dimension (in bytes) </td></tr>
539 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_step_y</td><td>mapy_stride_y * number of elements along Y processed per work item (in bytes) </td></tr>
540 <tr><td class="paramdir">[in]</td><td class="paramname">mapx_offset_first_element_in_bytes</td><td>Offset of the first element in the remapping image </td></tr>
541 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_ptr</td><td>Pointer to the x remapping image. Supported data types: F32. </td></tr>
542 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_stride_x</td><td>Stride of the remapping image in X dimension (in bytes) </td></tr>
543 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_step_x</td><td>mapy_stride_x * number of elements along X processed per work item (in bytes) </td></tr>
544 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_stride_y</td><td>Stride of the remapping image in Y dimension (in bytes) </td></tr>
545 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_step_y</td><td>mapy_stride_y * number of elements along Y processed per work item (in bytes) </td></tr>
546 <tr><td class="paramdir">[in]</td><td class="paramname">mapy_offset_first_element_in_bytes</td><td>Offset of the first element in the remapping image </td></tr>
547 <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>Width of the input image </td></tr>
548 <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the input image </td></tr>
549 </table>
550 </dd>
551</dl>
552
553<p>Definition at line <a class="el" href="remap_8cl_source.xhtml#l00059">59</a> of file <a class="el" href="remap_8cl_source.xhtml">remap.cl</a>.</p>
554
555<p>References <a class="el" href="warp__helpers_8h_source.xhtml#l00033">clamp_to_border()</a>, <a class="el" href="helpers_8h_source.xhtml#l00073">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="helpers_8h_source.xhtml#l00076">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>, <a class="el" href="helpers_8h_source.xhtml#l00097">Image::ptr</a>, and <a class="el" href="warp__helpers_8h_source.xhtml#l00045">read_texels4()</a>.</p>
556<div class="fragment"><div class="line"><a name="l00066"></a><span class="lineno"> 66</span>&#160;{</div><div class="line"><a name="l00067"></a><span class="lineno"> 67</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="l00068"></a><span class="lineno"> 68</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="l00069"></a><span class="lineno"> 69</span>&#160; <a class="code" href="struct_image.xhtml">Image</a> mapx = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(mapx);</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <a class="code" href="struct_image.xhtml">Image</a> mapy = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(mapy);</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;</div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>&#160; float4 mapx_coords = vload4(0, (__global <span class="keywordtype">float</span> *)mapx.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span>&#160; float4 mapy_coords = vload4(0, (__global <span class="keywordtype">float</span> *)mapy.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span>&#160; float8 map_coords = (float8)(mapx_coords.s0, mapy_coords.s0, mapx_coords.s1, mapy_coords.s1,</div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>&#160; mapx_coords.s2, mapy_coords.s2, mapx_coords.s3, mapy_coords.s3);</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span>&#160; map_coords += (float8)(0.5f);</div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span>&#160;</div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>&#160; vstore4(<a class="code" href="warp__helpers_8h.xhtml#aba42442a4c991cdbb52727fa370676f1">read_texels4</a>(&amp;in, convert_int8(<a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(map_coords, width, height))), 0, out.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00079"></a><span class="lineno"> 79</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>
557<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>
558<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>
559<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>
560<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>
561<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>
562</div><!-- fragment -->
563</div>
564</div>
565</div><!-- contents -->
566</div><!-- doc-content -->
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