documentation/scale_8cl.xhtml

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  43    &#160;<span id="projectnumber">17.03.1</span>
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 114 <div class="header">
 115   <div class="summary">
 116 <a href="#func-members">Functions</a>  </div>
 117   <div class="headertitle">
 118 <div class="title">scale.cl File Reference</div>  </div>
 119 </div><!--header-->
 120 <div class="contents">
 121 <div class="textblock"><code>#include &quot;<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>&quot;</code><br />
 122 <code>#include &quot;<a class="el" href="warp__helpers_8h_source.xhtml">warp_helpers.h</a>&quot;</code><br />
 123 </div>
 124 <p><a href="scale_8cl_source.xhtml">Go to the source code of this file.</a></p>
 125 <table class="memberdecls">
 126 <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
 127 Functions</h2></td></tr>
 128 <tr class="memitem:a55c710b814464d9b8982c4eb6ca04dee"><td class="memItemLeft" align="right" valign="top">const float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="scale_8cl.xhtml#a55c710b814464d9b8982c4eb6ca04dee">transform_nearest</a> (const float2 coord, const float2 scale)</td></tr>
 129 <tr class="memdesc:a55c710b814464d9b8982c4eb6ca04dee"><td class="mdescLeft">&#160;</td><td class="mdescRight">Transforms four 2D coordinates.  <a href="#a55c710b814464d9b8982c4eb6ca04dee">More...</a><br /></td></tr>
 130 <tr class="separator:a55c710b814464d9b8982c4eb6ca04dee"><td class="memSeparator" colspan="2">&#160;</td></tr>
 131 <tr class="memitem:a1990e87858b15b8fce3f63965fb9b86c"><td class="memItemLeft" align="right" valign="top">const float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="scale_8cl.xhtml#a1990e87858b15b8fce3f63965fb9b86c">transform_bilinear</a> (const float2 coord, const float2 scale)</td></tr>
 132 <tr class="memdesc:a1990e87858b15b8fce3f63965fb9b86c"><td class="mdescLeft">&#160;</td><td class="mdescRight">Transforms four 2D coordinates.  <a href="#a1990e87858b15b8fce3f63965fb9b86c">More...</a><br /></td></tr>
 133 <tr class="separator:a1990e87858b15b8fce3f63965fb9b86c"><td class="memSeparator" colspan="2">&#160;</td></tr>
 134 <tr class="memitem:aec1496e8c3bdb3630f92433b1820e713"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="scale_8cl.xhtml#aec1496e8c3bdb3630f92433b1820e713">scale_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 float input_width, const float input_height, const float output_width, const float output_height)</td></tr>
 135 <tr class="memdesc:aec1496e8c3bdb3630f92433b1820e713"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs an affine transformation on an image interpolating with the NEAREAST NEIGHBOUR method.  <a href="#aec1496e8c3bdb3630f92433b1820e713">More...</a><br /></td></tr>
 136 <tr class="separator:aec1496e8c3bdb3630f92433b1820e713"><td class="memSeparator" colspan="2">&#160;</td></tr>
 137 <tr class="memitem:a8d3a406833cc2a6e4eb51a43d5dcdc84"><td class="memItemLeft" align="right" valign="top">__kernel void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="scale_8cl.xhtml#a8d3a406833cc2a6e4eb51a43d5dcdc84">scale_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 float input_width, const float input_height, const float output_width, const float output_height)</td></tr>
 138 <tr class="memdesc:a8d3a406833cc2a6e4eb51a43d5dcdc84"><td class="mdescLeft">&#160;</td><td class="mdescRight">Performs an affine transformation on an image interpolating with the BILINEAR method.  <a href="#a8d3a406833cc2a6e4eb51a43d5dcdc84">More...</a><br /></td></tr>
 139 <tr class="separator:a8d3a406833cc2a6e4eb51a43d5dcdc84"><td class="memSeparator" colspan="2">&#160;</td></tr>
 140 </table>
 141 <h2 class="groupheader">Function Documentation</h2>
 142 <a class="anchor" id="a8d3a406833cc2a6e4eb51a43d5dcdc84"></a>
 143 <div class="memitem">
 144 <div class="memproto">
 145       <table class="memname">
 146         <tr>
 147           <td class="memname">__kernel void scale_bilinear </td>
 148           <td>(</td>
 149           <td class="paramtype">__global uchar *&#160;</td>
 150           <td class="paramname"><em>in_ptr</em>, </td>
 151         </tr>
 152         <tr>
 153           <td class="paramkey"></td>
 154           <td></td>
 155           <td class="paramtype">uint&#160;</td>
 156           <td class="paramname"><em>in_stride_x</em>, </td>
 157         </tr>
 158         <tr>
 159           <td class="paramkey"></td>
 160           <td></td>
 161           <td class="paramtype">uint&#160;</td>
 162           <td class="paramname"><em>in_step_x</em>, </td>
 163         </tr>
 164         <tr>
 165           <td class="paramkey"></td>
 166           <td></td>
 167           <td class="paramtype">uint&#160;</td>
 168           <td class="paramname"><em>in_stride_y</em>, </td>
 169         </tr>
 170         <tr>
 171           <td class="paramkey"></td>
 172           <td></td>
 173           <td class="paramtype">uint&#160;</td>
 174           <td class="paramname"><em>in_step_y</em>, </td>
 175         </tr>
 176         <tr>
 177           <td class="paramkey"></td>
 178           <td></td>
 179           <td class="paramtype">uint&#160;</td>
 180           <td class="paramname"><em>in_offset_first_element_in_bytes</em>, </td>
 181         </tr>
 182         <tr>
 183           <td class="paramkey"></td>
 184           <td></td>
 185           <td class="paramtype">__global uchar *&#160;</td>
 186           <td class="paramname"><em>out_ptr</em>, </td>
 187         </tr>
 188         <tr>
 189           <td class="paramkey"></td>
 190           <td></td>
 191           <td class="paramtype">uint&#160;</td>
 192           <td class="paramname"><em>out_stride_x</em>, </td>
 193         </tr>
 194         <tr>
 195           <td class="paramkey"></td>
 196           <td></td>
 197           <td class="paramtype">uint&#160;</td>
 198           <td class="paramname"><em>out_step_x</em>, </td>
 199         </tr>
 200         <tr>
 201           <td class="paramkey"></td>
 202           <td></td>
 203           <td class="paramtype">uint&#160;</td>
 204           <td class="paramname"><em>out_stride_y</em>, </td>
 205         </tr>
 206         <tr>
 207           <td class="paramkey"></td>
 208           <td></td>
 209           <td class="paramtype">uint&#160;</td>
 210           <td class="paramname"><em>out_step_y</em>, </td>
 211         </tr>
 212         <tr>
 213           <td class="paramkey"></td>
 214           <td></td>
 215           <td class="paramtype">uint&#160;</td>
 216           <td class="paramname"><em>out_offset_first_element_in_bytes</em>, </td>
 217         </tr>
 218         <tr>
 219           <td class="paramkey"></td>
 220           <td></td>
 221           <td class="paramtype">const float&#160;</td>
 222           <td class="paramname"><em>input_width</em>, </td>
 223         </tr>
 224         <tr>
 225           <td class="paramkey"></td>
 226           <td></td>
 227           <td class="paramtype">const float&#160;</td>
 228           <td class="paramname"><em>input_height</em>, </td>
 229         </tr>
 230         <tr>
 231           <td class="paramkey"></td>
 232           <td></td>
 233           <td class="paramtype">const float&#160;</td>
 234           <td class="paramname"><em>output_width</em>, </td>
 235         </tr>
 236         <tr>
 237           <td class="paramkey"></td>
 238           <td></td>
 239           <td class="paramtype">const float&#160;</td>
 240           <td class="paramname"><em>output_height</em>&#160;</td>
 241         </tr>
 242         <tr>
 243           <td></td>
 244           <td>)</td>
 245           <td></td><td></td>
 246         </tr>
 247       </table>
 248 </div><div class="memdoc">
 249
 250 <p>Performs an affine transformation on an image interpolating with the BILINEAR method. </p>
 251 <dl class="params"><dt>Parameters</dt><dd>
 252   <table class="params">
 253     <tr><td class="paramdir">[in]</td><td class="paramname">in_ptr</td><td>Pointer to the source image. Supported data types: U8, S16. </td></tr>
 254     <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>
 255     <tr><td class="paramdir">[in]</td><td class="paramname">in_step_x</td><td>src_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 256     <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>
 257     <tr><td class="paramdir">[in]</td><td class="paramname">in_step_y</td><td>src_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 258     <tr><td class="paramdir">[in]</td><td class="paramname">in_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr>
 259     <tr><td class="paramdir">[out]</td><td class="paramname">out_ptr</td><td>Pointer to the destination image. Supported data types: U8, S16. (Must be the same as the input) </td></tr>
 260     <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>
 261     <tr><td class="paramdir">[in]</td><td class="paramname">out_step_x</td><td>dst_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 262     <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>
 263     <tr><td class="paramdir">[in]</td><td class="paramname">out_step_y</td><td>dst_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 264     <tr><td class="paramdir">[in]</td><td class="paramname">out_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
 265     <tr><td class="paramdir">[in]</td><td class="paramname">input_width</td><td>Input image width </td></tr>
 266     <tr><td class="paramdir">[in]</td><td class="paramname">input_height</td><td>Input image height </td></tr>
 267     <tr><td class="paramdir">[in]</td><td class="paramname">output_width</td><td>Output image width </td></tr>
 268     <tr><td class="paramdir">[in]</td><td class="paramname">output_height</td><td>Output image height </td></tr>
 269   </table>
 270   </dd>
 271 </dl>
 272
 273 <p>Definition at line <a class="el" href="scale_8cl_source.xhtml#l00110">110</a> of file <a class="el" href="scale_8cl_source.xhtml">scale.cl</a>.</p>
 274
 275 <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>, <a class="el" href="convolution3x3_8cl_source.xhtml#l00027">DATA_TYPE</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00054">get_current_coords()</a>, <a class="el" href="helpers_8h_source.xhtml#l00097">Image::ptr</a>, and <a class="el" href="scale_8cl_source.xhtml#l00049">transform_bilinear()</a>.</p>
 276 <div class="fragment"><div class="line"><a name="l00117"></a><span class="lineno">  117</span>&#160;{</div><div class="line"><a name="l00118"></a><span class="lineno">  118</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a>        in  = <a class="code" href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(in);</div><div class="line"><a name="l00119"></a><span class="lineno">  119</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a>        out = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(out);</div><div class="line"><a name="l00120"></a><span class="lineno">  120</span>&#160;    <span class="keyword">const</span> float2 r   = (float2)(input_width / output_width, input_height / output_height);</div><div class="line"><a name="l00121"></a><span class="lineno">  121</span>&#160;    <span class="keyword">const</span> float8 tc  = <a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(<a class="code" href="scale_8cl.xhtml#a1990e87858b15b8fce3f63965fb9b86c">transform_bilinear</a>(<a class="code" href="warp__helpers_8h.xhtml#a4caaeeb51ea58015267a9974675226d1">get_current_coords</a>(), r), input_width, input_height);</div><div class="line"><a name="l00122"></a><span class="lineno">  122</span>&#160;    vstore4(<a class="code" href="warp__helpers_8h.xhtml#abea9f226daf3e0ad741d03cf7417d353">bilinear_interpolate</a>(&amp;in, tc, input_width, input_height), 0, (__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)out.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00123"></a><span class="lineno">  123</span>&#160;}</div><div class="ttc" id="warp__helpers_8h_xhtml_adbdf2ca9e8fe0b67f9359929ef743126"><div class="ttname"><a href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a></div><div class="ttdeci">const float8 clamp_to_border(float8 coords, const float width, const float height)</div><div class="ttdoc">Clamps the given coordinates to the borders. </div><div class="ttdef"><b>Definition:</b> <a href="warp__helpers_8h_source.xhtml#l00033">warp_helpers.h:33</a></div></div>
 277 <div class="ttc" id="convolution3x3_8cl_xhtml_afb8c72ce35c4a1f4a2588d6573e54aa1"><div class="ttname"><a href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a></div><div class="ttdeci">#define DATA_TYPE</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00027">convolution3x3.cl:27</a></div></div>
 278 <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>
 279 <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>
 280 <div class="ttc" id="scale_8cl_xhtml_a1990e87858b15b8fce3f63965fb9b86c"><div class="ttname"><a href="scale_8cl.xhtml#a1990e87858b15b8fce3f63965fb9b86c">transform_bilinear</a></div><div class="ttdeci">const float8 transform_bilinear(const float2 coord, const float2 scale)</div><div class="ttdoc">Transforms four 2D coordinates. </div><div class="ttdef"><b>Definition:</b> <a href="scale_8cl_source.xhtml#l00049">scale.cl:49</a></div></div>
 281 <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>
 282 <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>
 283 <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>
 284 <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>
 285 </div><!-- fragment -->
 286 </div>
 287 </div>
 288 <a class="anchor" id="aec1496e8c3bdb3630f92433b1820e713"></a>
 289 <div class="memitem">
 290 <div class="memproto">
 291       <table class="memname">
 292         <tr>
 293           <td class="memname">__kernel void scale_nearest_neighbour </td>
 294           <td>(</td>
 295           <td class="paramtype">__global uchar *&#160;</td>
 296           <td class="paramname"><em>in_ptr</em>, </td>
 297         </tr>
 298         <tr>
 299           <td class="paramkey"></td>
 300           <td></td>
 301           <td class="paramtype">uint&#160;</td>
 302           <td class="paramname"><em>in_stride_x</em>, </td>
 303         </tr>
 304         <tr>
 305           <td class="paramkey"></td>
 306           <td></td>
 307           <td class="paramtype">uint&#160;</td>
 308           <td class="paramname"><em>in_step_x</em>, </td>
 309         </tr>
 310         <tr>
 311           <td class="paramkey"></td>
 312           <td></td>
 313           <td class="paramtype">uint&#160;</td>
 314           <td class="paramname"><em>in_stride_y</em>, </td>
 315         </tr>
 316         <tr>
 317           <td class="paramkey"></td>
 318           <td></td>
 319           <td class="paramtype">uint&#160;</td>
 320           <td class="paramname"><em>in_step_y</em>, </td>
 321         </tr>
 322         <tr>
 323           <td class="paramkey"></td>
 324           <td></td>
 325           <td class="paramtype">uint&#160;</td>
 326           <td class="paramname"><em>in_offset_first_element_in_bytes</em>, </td>
 327         </tr>
 328         <tr>
 329           <td class="paramkey"></td>
 330           <td></td>
 331           <td class="paramtype">__global uchar *&#160;</td>
 332           <td class="paramname"><em>out_ptr</em>, </td>
 333         </tr>
 334         <tr>
 335           <td class="paramkey"></td>
 336           <td></td>
 337           <td class="paramtype">uint&#160;</td>
 338           <td class="paramname"><em>out_stride_x</em>, </td>
 339         </tr>
 340         <tr>
 341           <td class="paramkey"></td>
 342           <td></td>
 343           <td class="paramtype">uint&#160;</td>
 344           <td class="paramname"><em>out_step_x</em>, </td>
 345         </tr>
 346         <tr>
 347           <td class="paramkey"></td>
 348           <td></td>
 349           <td class="paramtype">uint&#160;</td>
 350           <td class="paramname"><em>out_stride_y</em>, </td>
 351         </tr>
 352         <tr>
 353           <td class="paramkey"></td>
 354           <td></td>
 355           <td class="paramtype">uint&#160;</td>
 356           <td class="paramname"><em>out_step_y</em>, </td>
 357         </tr>
 358         <tr>
 359           <td class="paramkey"></td>
 360           <td></td>
 361           <td class="paramtype">uint&#160;</td>
 362           <td class="paramname"><em>out_offset_first_element_in_bytes</em>, </td>
 363         </tr>
 364         <tr>
 365           <td class="paramkey"></td>
 366           <td></td>
 367           <td class="paramtype">const float&#160;</td>
 368           <td class="paramname"><em>input_width</em>, </td>
 369         </tr>
 370         <tr>
 371           <td class="paramkey"></td>
 372           <td></td>
 373           <td class="paramtype">const float&#160;</td>
 374           <td class="paramname"><em>input_height</em>, </td>
 375         </tr>
 376         <tr>
 377           <td class="paramkey"></td>
 378           <td></td>
 379           <td class="paramtype">const float&#160;</td>
 380           <td class="paramname"><em>output_width</em>, </td>
 381         </tr>
 382         <tr>
 383           <td class="paramkey"></td>
 384           <td></td>
 385           <td class="paramtype">const float&#160;</td>
 386           <td class="paramname"><em>output_height</em>&#160;</td>
 387         </tr>
 388         <tr>
 389           <td></td>
 390           <td>)</td>
 391           <td></td><td></td>
 392         </tr>
 393       </table>
 394 </div><div class="memdoc">
 395
 396 <p>Performs an affine transformation on an image interpolating with the NEAREAST NEIGHBOUR method. </p>
 397 <p>Input and output are single channel U8 or S16.</p>
 398 <dl class="params"><dt>Parameters</dt><dd>
 399   <table class="params">
 400     <tr><td class="paramdir">[in]</td><td class="paramname">in_ptr</td><td>Pointer to the source image. Supported data types: U8, S16. </td></tr>
 401     <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>
 402     <tr><td class="paramdir">[in]</td><td class="paramname">in_step_x</td><td>src_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 403     <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>
 404     <tr><td class="paramdir">[in]</td><td class="paramname">in_step_y</td><td>src_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 405     <tr><td class="paramdir">[in]</td><td class="paramname">in_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr>
 406     <tr><td class="paramdir">[out]</td><td class="paramname">out_ptr</td><td>Pointer to the destination image. Supported data types: U8, S16. (Must be the same as the input) </td></tr>
 407     <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>
 408     <tr><td class="paramdir">[in]</td><td class="paramname">out_step_x</td><td>dst_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
 409     <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>
 410     <tr><td class="paramdir">[in]</td><td class="paramname">out_step_y</td><td>dst_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
 411     <tr><td class="paramdir">[in]</td><td class="paramname">out_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
 412     <tr><td class="paramdir">[in]</td><td class="paramname">input_width</td><td>Input image width </td></tr>
 413     <tr><td class="paramdir">[in]</td><td class="paramname">input_height</td><td>Input image height </td></tr>
 414     <tr><td class="paramdir">[in]</td><td class="paramname">output_width</td><td>Output image width </td></tr>
 415     <tr><td class="paramdir">[in]</td><td class="paramname">output_height</td><td>Output image height </td></tr>
 416   </table>
 417   </dd>
 418 </dl>
 419
 420 <p>Definition at line <a class="el" href="scale_8cl_source.xhtml#l00076">76</a> of file <a class="el" href="scale_8cl_source.xhtml">scale.cl</a>.</p>
 421
 422 <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="convolution3x3_8cl_source.xhtml#l00027">DATA_TYPE</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00054">get_current_coords()</a>, <a class="el" href="helpers_8h_source.xhtml#l00097">Image::ptr</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00045">read_texels4()</a>, and <a class="el" href="scale_8cl_source.xhtml#l00034">transform_nearest()</a>.</p>
 423 <div class="fragment"><div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;{</div><div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a>        in  = <a class="code" href="helpers_8h.xhtml#a4334a4a76f8e9628c0fb9e1acf616e2a">CONVERT_TO_IMAGE_STRUCT_NO_STEP</a>(in);</div><div class="line"><a name="l00085"></a><span class="lineno">   85</span>&#160;    <a class="code" href="struct_image.xhtml">Image</a>        out = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(out);</div><div class="line"><a name="l00086"></a><span class="lineno">   86</span>&#160;    <span class="keyword">const</span> float2 r   = (float2)(input_width / output_width, input_height / output_height);</div><div class="line"><a name="l00087"></a><span class="lineno">   87</span>&#160;    <span class="keyword">const</span> float8 tc  = <a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(<a class="code" href="scale_8cl.xhtml#a55c710b814464d9b8982c4eb6ca04dee">transform_nearest</a>(<a class="code" href="warp__helpers_8h.xhtml#a4caaeeb51ea58015267a9974675226d1">get_current_coords</a>(), r), input_width, input_height);</div><div class="line"><a name="l00088"></a><span class="lineno">   88</span>&#160;    vstore4(<a class="code" href="warp__helpers_8h.xhtml#aba42442a4c991cdbb52727fa370676f1">read_texels4</a>(&amp;in, convert_int8(tc)), 0, (__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)out.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>);</div><div class="line"><a name="l00089"></a><span class="lineno">   89</span>&#160;}</div><div class="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>
 424 <div class="ttc" id="convolution3x3_8cl_xhtml_afb8c72ce35c4a1f4a2588d6573e54aa1"><div class="ttname"><a href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a></div><div class="ttdeci">#define DATA_TYPE</div><div class="ttdef"><b>Definition:</b> <a href="convolution3x3_8cl_source.xhtml#l00027">convolution3x3.cl:27</a></div></div>
 425 <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>
 426 <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>
 427 <div class="ttc" id="scale_8cl_xhtml_a55c710b814464d9b8982c4eb6ca04dee"><div class="ttname"><a href="scale_8cl.xhtml#a55c710b814464d9b8982c4eb6ca04dee">transform_nearest</a></div><div class="ttdeci">const float8 transform_nearest(const float2 coord, const float2 scale)</div><div class="ttdoc">Transforms four 2D coordinates. </div><div class="ttdef"><b>Definition:</b> <a href="scale_8cl_source.xhtml#l00034">scale.cl:34</a></div></div>
 428 <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>
 429 <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>
 430 <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>
 431 <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>
 432 </div><!-- fragment -->
 433 </div>
 434 </div>
 435 <a class="anchor" id="a1990e87858b15b8fce3f63965fb9b86c"></a>
 436 <div class="memitem">
 437 <div class="memproto">
 438 <table class="mlabels">
 439   <tr>
 440   <td class="mlabels-left">
 441       <table class="memname">
 442         <tr>
 443           <td class="memname">const float8 transform_bilinear </td>
 444           <td>(</td>
 445           <td class="paramtype">const float2&#160;</td>
 446           <td class="paramname"><em>coord</em>, </td>
 447         </tr>
 448         <tr>
 449           <td class="paramkey"></td>
 450           <td></td>
 451           <td class="paramtype">const float2&#160;</td>
 452           <td class="paramname"><em>scale</em>&#160;</td>
 453         </tr>
 454         <tr>
 455           <td></td>
 456           <td>)</td>
 457           <td></td><td></td>
 458         </tr>
 459       </table>
 460   </td>
 461   <td class="mlabels-right">
 462 <span class="mlabels"><span class="mlabel">inline</span></span>  </td>
 463   </tr>
 464 </table>
 465 </div><div class="memdoc">
 466
 467 <p>Transforms four 2D coordinates. </p>
 468 <p>This is used to map the output coordinates to the input coordinates.</p>
 469 <dl class="params"><dt>Parameters</dt><dd>
 470   <table class="params">
 471     <tr><td class="paramdir">[in]</td><td class="paramname">coord</td><td>2D coordinates to transform. </td></tr>
 472     <tr><td class="paramdir">[in]</td><td class="paramname">scale</td><td>input/output scale ratio</td></tr>
 473   </table>
 474   </dd>
 475 </dl>
 476 <dl class="section return"><dt>Returns</dt><dd>a float8 containing 4 2D transformed values in the input image. </dd></dl>
 477
 478 <p>Definition at line <a class="el" href="scale_8cl_source.xhtml#l00049">49</a> of file <a class="el" href="scale_8cl_source.xhtml">scale.cl</a>.</p>
 479
 480 <p>Referenced by <a class="el" href="scale_8cl_source.xhtml#l00110">scale_bilinear()</a>.</p>
 481 <div class="fragment"><div class="line"><a name="l00050"></a><span class="lineno">   50</span>&#160;{</div><div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;    <span class="keyword">const</span> float4 in_x_coords = (float4)(coord.s0, 1 + coord.s0, 2 + coord.s0, 3 + coord.s0);</div><div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;    <span class="keyword">const</span> float4 new_x       = (in_x_coords + ((float4)(0.5f))) * (float4)(scale.s0) - (float4)(0.5f);</div><div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;    <span class="keyword">const</span> float4 new_y       = (float4)((coord.s1 + 0.5f) * scale.s1 - 0.5f);</div><div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;    <span class="keywordflow">return</span> (float8)(new_x.s0, new_y.s0, new_x.s1, new_y.s1, new_x.s2, new_y.s2, new_x.s3, new_y.s3);</div><div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;}</div></div><!-- fragment -->
 482 </div>
 483 </div>
 484 <a class="anchor" id="a55c710b814464d9b8982c4eb6ca04dee"></a>
 485 <div class="memitem">
 486 <div class="memproto">
 487 <table class="mlabels">
 488   <tr>
 489   <td class="mlabels-left">
 490       <table class="memname">
 491         <tr>
 492           <td class="memname">const float8 transform_nearest </td>
 493           <td>(</td>
 494           <td class="paramtype">const float2&#160;</td>
 495           <td class="paramname"><em>coord</em>, </td>
 496         </tr>
 497         <tr>
 498           <td class="paramkey"></td>
 499           <td></td>
 500           <td class="paramtype">const float2&#160;</td>
 501           <td class="paramname"><em>scale</em>&#160;</td>
 502         </tr>
 503         <tr>
 504           <td></td>
 505           <td>)</td>
 506           <td></td><td></td>
 507         </tr>
 508       </table>
 509   </td>
 510   <td class="mlabels-right">
 511 <span class="mlabels"><span class="mlabel">inline</span></span>  </td>
 512   </tr>
 513 </table>
 514 </div><div class="memdoc">
 515
 516 <p>Transforms four 2D coordinates. </p>
 517 <p>This is used to map the output coordinates to the input coordinates.</p>
 518 <dl class="params"><dt>Parameters</dt><dd>
 519   <table class="params">
 520     <tr><td class="paramdir">[in]</td><td class="paramname">coord</td><td>2D coordinates to transform. </td></tr>
 521     <tr><td class="paramdir">[in]</td><td class="paramname">scale</td><td>input/output scale ratio</td></tr>
 522   </table>
 523   </dd>
 524 </dl>
 525 <dl class="section return"><dt>Returns</dt><dd>a float8 containing 4 2D transformed values in the input image. </dd></dl>
 526
 527 <p>Definition at line <a class="el" href="scale_8cl_source.xhtml#l00034">34</a> of file <a class="el" href="scale_8cl_source.xhtml">scale.cl</a>.</p>
 528
 529 <p>Referenced by <a class="el" href="scale_8cl_source.xhtml#l00076">scale_nearest_neighbour()</a>.</p>
 530 <div class="fragment"><div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;{</div><div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;    <span class="keyword">const</span> float4 in_x_coords = (float4)(coord.s0, 1 + coord.s0, 2 + coord.s0, 3 + coord.s0);</div><div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;    <span class="keyword">const</span> float4 new_x       = (in_x_coords + ((float4)(0.5f))) * (float4)(scale.s0);</div><div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;    <span class="keyword">const</span> float4 new_y       = (float4)((coord.s1 + 0.5f) * scale.s1);</div><div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;    <span class="keywordflow">return</span> (float8)(new_x.s0, new_y.s0, new_x.s1, new_y.s1, new_x.s2, new_y.s2, new_x.s3, new_y.s3);</div><div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;}</div></div><!-- fragment -->
 531 </div>
 532 </div>
 533 </div><!-- contents -->
 534 </div><!-- doc-content -->
 535 <!-- start footer part -->
 536 <div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
 537   <ul>
 538     <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="scale_8cl.xhtml">scale.cl</a></li>
 539     <li class="footer">Generated on Fri Mar 24 2017 17:23:50 for ARM Compute Library by
 540     <a href="http://www.doxygen.org/index.html">
 541     <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.11 </li>
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