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gerrit-public.fairphone.software / platform / external / ComputeLibrary / c772c0b2ecfe76cac5867915fdc296d14bb829a2 / . / documentation / warp__helpers_8h.xhtml
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Anthony Barbiera4376382017-04-12 15:12:46 +0100[diff] [blame]43 &#160;<span id="projectnumber">17.04</span>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]44 </div>
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114<div class="header">
115 <div class="summary">
116<a href="#func-members">Functions</a> </div>
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118<div class="title">warp_helpers.h 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</div>
123<p><a href="warp__helpers_8h_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:adbdf2ca9e8fe0b67f9359929ef743126"><td class="memItemLeft" align="right" valign="top">const float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a> (float8 coords, const float width, const float height)</td></tr>
128<tr class="memdesc:adbdf2ca9e8fe0b67f9359929ef743126"><td class="mdescLeft">&#160;</td><td class="mdescRight">Clamps the given coordinates to the borders. <a href="#adbdf2ca9e8fe0b67f9359929ef743126">More...</a><br /></td></tr>
129<tr class="separator:adbdf2ca9e8fe0b67f9359929ef743126"><td class="memSeparator" colspan="2">&#160;</td></tr>
130<tr class="memitem:aba42442a4c991cdbb52727fa370676f1"><td class="memItemLeft" align="right" valign="top">const DATA_TYPE4&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="warp__helpers_8h.xhtml#aba42442a4c991cdbb52727fa370676f1">read_texels4</a> (const <a class="el" href="struct_image.xhtml">Image</a> *in, const int8 coords)</td></tr>
131<tr class="memdesc:aba42442a4c991cdbb52727fa370676f1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Reads four texels from the input image. <a href="#aba42442a4c991cdbb52727fa370676f1">More...</a><br /></td></tr>
132<tr class="separator:aba42442a4c991cdbb52727fa370676f1"><td class="memSeparator" colspan="2">&#160;</td></tr>
133<tr class="memitem:a4caaeeb51ea58015267a9974675226d1"><td class="memItemLeft" align="right" valign="top">const float2&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="warp__helpers_8h.xhtml#a4caaeeb51ea58015267a9974675226d1">get_current_coords</a> ()</td></tr>
134<tr class="memdesc:a4caaeeb51ea58015267a9974675226d1"><td class="mdescLeft">&#160;</td><td class="mdescRight">Returns the current thread coordinates. <a href="#a4caaeeb51ea58015267a9974675226d1">More...</a><br /></td></tr>
135<tr class="separator:a4caaeeb51ea58015267a9974675226d1"><td class="memSeparator" colspan="2">&#160;</td></tr>
136<tr class="memitem:a2d8047717d6464cad02c5979d09576db"><td class="memItemLeft" align="right" valign="top">const float8&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="warp__helpers_8h.xhtml#a2d8047717d6464cad02c5979d09576db">get_neighbour_coords</a> (const float2 coord)</td></tr>
137<tr class="memdesc:a2d8047717d6464cad02c5979d09576db"><td class="mdescLeft">&#160;</td><td class="mdescRight">Given a texel coordinates this function will return the following array of coordinates: [ P, right neighbour, below neighbour, below right neighbour ]. <a href="#a2d8047717d6464cad02c5979d09576db">More...</a><br /></td></tr>
138<tr class="separator:a2d8047717d6464cad02c5979d09576db"><td class="memSeparator" colspan="2">&#160;</td></tr>
139<tr class="memitem:abea9f226daf3e0ad741d03cf7417d353"><td class="memItemLeft" align="right" valign="top">const DATA_TYPE4&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="warp__helpers_8h.xhtml#abea9f226daf3e0ad741d03cf7417d353">bilinear_interpolate</a> (const <a class="el" href="struct_image.xhtml">Image</a> *in, const float8 coords, const float width, const float height)</td></tr>
140<tr class="memdesc:abea9f226daf3e0ad741d03cf7417d353"><td class="mdescLeft">&#160;</td><td class="mdescRight">Computes the bilinear interpolation for each set of coordinates in the vector coords and returns the values. <a href="#abea9f226daf3e0ad741d03cf7417d353">More...</a><br /></td></tr>
141<tr class="separator:abea9f226daf3e0ad741d03cf7417d353"><td class="memSeparator" colspan="2">&#160;</td></tr>
142</table>
143<h2 class="groupheader">Function Documentation</h2>
144<a class="anchor" id="abea9f226daf3e0ad741d03cf7417d353"></a>
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150 <table class="memname">
151 <tr>
152 <td class="memname">const DATA_TYPE4 bilinear_interpolate </td>
153 <td>(</td>
154 <td class="paramtype">const <a class="el" href="struct_image.xhtml">Image</a> *&#160;</td>
155 <td class="paramname"><em>in</em>, </td>
156 </tr>
157 <tr>
158 <td class="paramkey"></td>
159 <td></td>
160 <td class="paramtype">const float8&#160;</td>
161 <td class="paramname"><em>coords</em>, </td>
162 </tr>
163 <tr>
164 <td class="paramkey"></td>
165 <td></td>
166 <td class="paramtype">const float&#160;</td>
167 <td class="paramname"><em>width</em>, </td>
168 </tr>
169 <tr>
170 <td class="paramkey"></td>
171 <td></td>
172 <td class="paramtype">const float&#160;</td>
173 <td class="paramname"><em>height</em>&#160;</td>
174 </tr>
175 <tr>
176 <td></td>
177 <td>)</td>
178 <td></td><td></td>
179 </tr>
180 </table>
181 </td>
182 <td class="mlabels-right">
183<span class="mlabels"><span class="mlabel">inline</span></span> </td>
184 </tr>
185</table>
186</div><div class="memdoc">
187
188<p>Computes the bilinear interpolation for each set of coordinates in the vector coords and returns the values. </p>
189<dl class="params"><dt>Parameters</dt><dd>
190 <table class="params">
191 <tr><td class="paramdir">[in]</td><td class="paramname">in</td><td>Pointer to the source image. </td></tr>
192 <tr><td class="paramdir">[in]</td><td class="paramname">coords</td><td><a class="el" href="struct_vector.xhtml" title="Structure to hold Vector information. ">Vector</a> of four 2D coordinates. Even pos is x and odd y. </td></tr>
193 <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>Width of the image </td></tr>
194 <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the image </td></tr>
195 </table>
196 </dd>
197</dl>
198
199<p>Definition at line <a class="el" href="warp__helpers_8h_source.xhtml#l00080">80</a> of file <a class="el" href="warp__helpers_8h_source.xhtml">warp_helpers.h</a>.</p>
200
201<p>References <a class="el" href="warp__helpers_8h_source.xhtml#l00033">clamp_to_border()</a>, <a class="el" href="helpers_8h_source.xhtml#l00035">CONVERT</a>, <a class="el" href="convolution3x3_8cl_source.xhtml#l00027">DATA_TYPE</a>, <a class="el" href="warp__helpers_8h_source.xhtml#l00068">get_neighbour_coords()</a>, <a class="el" href="helpers_8h_source.xhtml#l00201">offset()</a>, and <a class="el" href="helpers_8h_source.xhtml#l00032">VEC_DATA_TYPE</a>.</p>
202
203<p>Referenced by <a class="el" href="remap_8cl_source.xhtml#l00113">remap_bilinear()</a>, <a class="el" href="scale_8cl_source.xhtml#l00110">scale_bilinear()</a>, <a class="el" href="warp__affine_8cl_source.xhtml#l00111">warp_affine_bilinear()</a>, and <a class="el" href="warp__perspective_8cl_source.xhtml#l00119">warp_perspective_bilinear()</a>.</p>
204<div class="fragment"><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;{</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>&#160; <span class="comment">// If any of the 4 texels is out of the image&#39;s boundaries we use the border value (REPLICATE or CONSTANT) for any texel out of the image.</span></div><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; <span class="comment">// Sets the 4x4 coordinates for each of the four input texels</span></div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keyword">const</span> float8 fc = floor(coords);</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="keyword">const</span> float16 c1 = (float16)(</div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span>&#160; <a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(<a class="code" href="warp__helpers_8h.xhtml#a2d8047717d6464cad02c5979d09576db">get_neighbour_coords</a>((float2)(fc.s0, fc.s1)), width, height),</div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>&#160; <a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(<a class="code" href="warp__helpers_8h.xhtml#a2d8047717d6464cad02c5979d09576db">get_neighbour_coords</a>((float2)(fc.s2, fc.s3)), width, height));</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keyword">const</span> float16 c2 = (float16)(</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>&#160; <a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(<a class="code" href="warp__helpers_8h.xhtml#a2d8047717d6464cad02c5979d09576db">get_neighbour_coords</a>((float2)(fc.s4, fc.s5)), width, height),</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span>&#160; <a class="code" href="warp__helpers_8h.xhtml#adbdf2ca9e8fe0b67f9359929ef743126">clamp_to_border</a>(<a class="code" href="warp__helpers_8h.xhtml#a2d8047717d6464cad02c5979d09576db">get_neighbour_coords</a>((float2)(fc.s6, fc.s7)), width, height));</div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span>&#160; <span class="comment">// Loads the values from the input image</span></div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="keyword">const</span> float16 t = (float16)(</div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="comment">/* tl, tr, bl, br */</span></div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>&#160; * ((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c1.s0, c1.s1)), *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c1.s2, c1.s3)),</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>&#160; *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c1.s4, c1.s5)), *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c1.s6, c1.s7)),</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span>&#160; *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c1.s8, c1.s9)), *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c1.sa, c1.sb)),</div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>&#160; *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c1.sc, c1.sd)), *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c1.se, c1.sf)),</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>&#160; *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c2.s0, c2.s1)), *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c2.s2, c2.s3)),</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span>&#160; *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c2.s4, c2.s5)), *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c2.s6, c2.s7)),</div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span>&#160; *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c2.s8, c2.s9)), *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c2.sa, c2.sb)),</div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>&#160; *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c2.sc, c2.sd)), *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, c2.se, c2.sf)));</div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="keyword">const</span> float8 a = coords - fc;</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>&#160; <span class="keyword">const</span> float8 b = ((float8)(1.f)) - a;</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; <span class="keyword">const</span> float4 fr = (float4)(</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>&#160; ((t.s0 * b.s0 * b.s1) + (t.s1 * a.s0 * b.s1) + (t.s2 * b.s0 * a.s1) + (t.s3 * a.s0 * a.s1)),</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span>&#160; ((t.s4 * b.s2 * b.s3) + (t.s5 * a.s2 * b.s3) + (t.s6 * b.s2 * a.s3) + (t.s7 * a.s2 * a.s3)),</div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>&#160; ((t.s8 * b.s4 * b.s5) + (t.s9 * a.s4 * b.s5) + (t.sa * b.s4 * a.s5) + (t.sb * a.s4 * a.s5)),</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>&#160; ((t.sc * b.s6 * b.s7) + (t.sd * a.s6 * b.s7) + (t.se * b.s6 * a.s7) + (t.sf * a.s6 * a.s7)));</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="keywordflow">return</span> <a class="code" href="helpers_8h.xhtml#aa8d95ba04fc73845abc6045952cae5be">CONVERT</a>(fr, <a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 4));</div><div class="line"><a name="l00111"></a><span class="lineno"> 111</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>
205<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>
206<div class="ttc" id="helpers_8h_xhtml_a009469e4d9b8fce3b6d5e97d2077827d"><div class="ttname"><a href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a></div><div class="ttdeci">__global uchar * offset(const Image *img, int x, int y)</div><div class="ttdoc">Get the pointer position of a Image. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00201">helpers.h:201</a></div></div>
207<div class="ttc" id="helpers_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a></div><div class="ttdeci">#define VEC_DATA_TYPE(type, size)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00032">helpers.h:32</a></div></div>
208<div class="ttc" id="warp__helpers_8h_xhtml_a2d8047717d6464cad02c5979d09576db"><div class="ttname"><a href="warp__helpers_8h.xhtml#a2d8047717d6464cad02c5979d09576db">get_neighbour_coords</a></div><div class="ttdeci">const float8 get_neighbour_coords(const float2 coord)</div><div class="ttdoc">Given a texel coordinates this function will return the following array of coordinates: [ P...</div><div class="ttdef"><b>Definition:</b> <a href="warp__helpers_8h_source.xhtml#l00068">warp_helpers.h:68</a></div></div>
209<div class="ttc" id="helpers_8h_xhtml_aa8d95ba04fc73845abc6045952cae5be"><div class="ttname"><a href="helpers_8h.xhtml#aa8d95ba04fc73845abc6045952cae5be">CONVERT</a></div><div class="ttdeci">#define CONVERT(x, type)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00035">helpers.h:35</a></div></div>
210</div><!-- fragment -->
211</div>
212</div>
213<a class="anchor" id="adbdf2ca9e8fe0b67f9359929ef743126"></a>
214<div class="memitem">
215<div class="memproto">
216<table class="mlabels">
217 <tr>
218 <td class="mlabels-left">
219 <table class="memname">
220 <tr>
221 <td class="memname">const float8 clamp_to_border </td>
222 <td>(</td>
223 <td class="paramtype">float8&#160;</td>
224 <td class="paramname"><em>coords</em>, </td>
225 </tr>
226 <tr>
227 <td class="paramkey"></td>
228 <td></td>
229 <td class="paramtype">const float&#160;</td>
230 <td class="paramname"><em>width</em>, </td>
231 </tr>
232 <tr>
233 <td class="paramkey"></td>
234 <td></td>
235 <td class="paramtype">const float&#160;</td>
236 <td class="paramname"><em>height</em>&#160;</td>
237 </tr>
238 <tr>
239 <td></td>
240 <td>)</td>
241 <td></td><td></td>
242 </tr>
243 </table>
244 </td>
245 <td class="mlabels-right">
246<span class="mlabels"><span class="mlabel">inline</span></span> </td>
247 </tr>
248</table>
249</div><div class="memdoc">
250
251<p>Clamps the given coordinates to the borders. </p>
252<dl class="params"><dt>Parameters</dt><dd>
253 <table class="params">
254 <tr><td class="paramdir">[in]</td><td class="paramname">coords</td><td><a class="el" href="struct_vector.xhtml" title="Structure to hold Vector information. ">Vector</a> of 2D coordinates to clamp. Even positions are X coords, odd positions are Y coords. </td></tr>
255 <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>Width of the image </td></tr>
256 <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the image </td></tr>
257 </table>
258 </dd>
259</dl>
260
261<p>Definition at line <a class="el" href="warp__helpers_8h_source.xhtml#l00033">33</a> of file <a class="el" href="warp__helpers_8h_source.xhtml">warp_helpers.h</a>.</p>
262
263<p>Referenced by <a class="el" href="warp__helpers_8h_source.xhtml#l00080">bilinear_interpolate()</a>, <a class="el" href="remap_8cl_source.xhtml#l00113">remap_bilinear()</a>, <a class="el" href="remap_8cl_source.xhtml#l00059">remap_nearest_neighbour()</a>, <a class="el" href="scale_8cl_source.xhtml#l00110">scale_bilinear()</a>, <a class="el" href="scale_8cl_source.xhtml#l00076">scale_nearest_neighbour()</a>, <a class="el" href="warp__affine_8cl_source.xhtml#l00111">warp_affine_bilinear()</a>, <a class="el" href="warp__affine_8cl_source.xhtml#l00079">warp_affine_nearest_neighbour()</a>, <a class="el" href="warp__perspective_8cl_source.xhtml#l00119">warp_perspective_bilinear()</a>, and <a class="el" href="warp__perspective_8cl_source.xhtml#l00087">warp_perspective_nearest_neighbour()</a>.</p>
264<div class="fragment"><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;{</div><div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keyword">const</span> float4 clamped_x = clamp(coords.even, -1.0, width);</div><div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keyword">const</span> float4 clamped_y = clamp(coords.odd, -1.0, height);</div><div class="line"><a name="l00037"></a><span class="lineno"> 37</span>&#160; <span class="keywordflow">return</span> (float8)(clamped_x.s0, clamped_y.s0, clamped_x.s1, clamped_y.s1, clamped_x.s2, clamped_y.s2, clamped_x.s3, clamped_y.s3);</div><div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;}</div></div><!-- fragment -->
265</div>
266</div>
267<a class="anchor" id="a4caaeeb51ea58015267a9974675226d1"></a>
268<div class="memitem">
269<div class="memproto">
270<table class="mlabels">
271 <tr>
272 <td class="mlabels-left">
273 <table class="memname">
274 <tr>
275 <td class="memname">const float2 get_current_coords </td>
276 <td>(</td>
277 <td class="paramname"></td><td>)</td>
278 <td></td>
279 </tr>
280 </table>
281 </td>
282 <td class="mlabels-right">
283<span class="mlabels"><span class="mlabel">inline</span></span> </td>
284 </tr>
285</table>
286</div><div class="memdoc">
287
288<p>Returns the current thread coordinates. </p>
289
290<p>Definition at line <a class="el" href="warp__helpers_8h_source.xhtml#l00054">54</a> of file <a class="el" href="warp__helpers_8h_source.xhtml">warp_helpers.h</a>.</p>
291
292<p>Referenced by <a class="el" href="scale_8cl_source.xhtml#l00110">scale_bilinear()</a>, <a class="el" href="scale_8cl_source.xhtml#l00076">scale_nearest_neighbour()</a>, <a class="el" href="warp__affine_8cl_source.xhtml#l00111">warp_affine_bilinear()</a>, <a class="el" href="warp__affine_8cl_source.xhtml#l00079">warp_affine_nearest_neighbour()</a>, <a class="el" href="warp__perspective_8cl_source.xhtml#l00119">warp_perspective_bilinear()</a>, and <a class="el" href="warp__perspective_8cl_source.xhtml#l00087">warp_perspective_nearest_neighbour()</a>.</p>
293<div class="fragment"><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;{</div><div class="line"><a name="l00056"></a><span class="lineno"> 56</span>&#160; <span class="keywordflow">return</span> (float2)(get_global_id(0) * 4, get_global_id(1));</div><div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;}</div></div><!-- fragment -->
294</div>
295</div>
296<a class="anchor" id="a2d8047717d6464cad02c5979d09576db"></a>
297<div class="memitem">
298<div class="memproto">
299<table class="mlabels">
300 <tr>
301 <td class="mlabels-left">
302 <table class="memname">
303 <tr>
304 <td class="memname">const float8 get_neighbour_coords </td>
305 <td>(</td>
306 <td class="paramtype">const float2&#160;</td>
307 <td class="paramname"><em>coord</em></td><td>)</td>
308 <td></td>
309 </tr>
310 </table>
311 </td>
312 <td class="mlabels-right">
313<span class="mlabels"><span class="mlabel">inline</span></span> </td>
314 </tr>
315</table>
316</div><div class="memdoc">
317
318<p>Given a texel coordinates this function will return the following array of coordinates: [ P, right neighbour, below neighbour, below right neighbour ]. </p>
319<dl class="section note"><dt>Note</dt><dd>No checks to see if the coordinates are out of the image are done here.</dd></dl>
320<dl class="params"><dt>Parameters</dt><dd>
321 <table class="params">
322 <tr><td class="paramdir">[in]</td><td class="paramname">coord</td><td>Input coordinates</td></tr>
323 </table>
324 </dd>
325</dl>
326<dl class="section return"><dt>Returns</dt><dd>vector of 8 floats with the coordinates, even positions are x and odd y. </dd></dl>
327
328<p>Definition at line <a class="el" href="warp__helpers_8h_source.xhtml#l00068">68</a> of file <a class="el" href="warp__helpers_8h_source.xhtml">warp_helpers.h</a>.</p>
329
330<p>Referenced by <a class="el" href="warp__helpers_8h_source.xhtml#l00080">bilinear_interpolate()</a>.</p>
331<div class="fragment"><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;{</div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>&#160; <span class="keywordflow">return</span> (float8)(<span class="comment">/*tl*/</span> coord.s0, coord.s1, <span class="comment">/*tr*/</span> coord.s0 + 1, coord.s1, <span class="comment">/*bl*/</span> coord.s0, coord.s1 + 1, <span class="comment">/*br*/</span> coord.s0 + 1, coord.s1 + 1);</div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;}</div></div><!-- fragment -->
332</div>
333</div>
334<a class="anchor" id="aba42442a4c991cdbb52727fa370676f1"></a>
335<div class="memitem">
336<div class="memproto">
337<table class="mlabels">
338 <tr>
339 <td class="mlabels-left">
340 <table class="memname">
341 <tr>
342 <td class="memname">const DATA_TYPE4 read_texels4 </td>
343 <td>(</td>
344 <td class="paramtype">const <a class="el" href="struct_image.xhtml">Image</a> *&#160;</td>
345 <td class="paramname"><em>in</em>, </td>
346 </tr>
347 <tr>
348 <td class="paramkey"></td>
349 <td></td>
350 <td class="paramtype">const int8&#160;</td>
351 <td class="paramname"><em>coords</em>&#160;</td>
352 </tr>
353 <tr>
354 <td></td>
355 <td>)</td>
356 <td></td><td></td>
357 </tr>
358 </table>
359 </td>
360 <td class="mlabels-right">
361<span class="mlabels"><span class="mlabel">inline</span></span> </td>
362 </tr>
363</table>
364</div><div class="memdoc">
365
366<p>Reads four texels from the input image. </p>
367<p>The coords vector is used to determine which texels to be read.</p>
368<dl class="params"><dt>Parameters</dt><dd>
369 <table class="params">
370 <tr><td class="paramdir">[in]</td><td class="paramname">in</td><td>Pointer to the source image. </td></tr>
371 <tr><td class="paramdir">[in]</td><td class="paramname">coords</td><td><a class="el" href="struct_vector.xhtml" title="Structure to hold Vector information. ">Vector</a> of coordinates to be read from the image. </td></tr>
372 </table>
373 </dd>
374</dl>
375
376<p>Definition at line <a class="el" href="warp__helpers_8h_source.xhtml#l00045">45</a> of file <a class="el" href="warp__helpers_8h_source.xhtml">warp_helpers.h</a>.</p>
377
378<p>References <a class="el" href="convolution3x3_8cl_source.xhtml#l00027">DATA_TYPE</a>, <a class="el" href="helpers_8h_source.xhtml#l00201">offset()</a>, and <a class="el" href="helpers_8h_source.xhtml#l00032">VEC_DATA_TYPE</a>.</p>
379
380<p>Referenced by <a class="el" href="remap_8cl_source.xhtml#l00059">remap_nearest_neighbour()</a>, <a class="el" href="scale_8cl_source.xhtml#l00076">scale_nearest_neighbour()</a>, <a class="el" href="warp__affine_8cl_source.xhtml#l00079">warp_affine_nearest_neighbour()</a>, and <a class="el" href="warp__perspective_8cl_source.xhtml#l00087">warp_perspective_nearest_neighbour()</a>.</p>
381<div class="fragment"><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;{</div><div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keywordflow">return</span> (<a class="code" href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 4))(*((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, coords.s0, coords.s1)),</div><div class="line"><a name="l00048"></a><span class="lineno"> 48</span>&#160; *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, coords.s2, coords.s3)),</div><div class="line"><a name="l00049"></a><span class="lineno"> 49</span>&#160; *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, coords.s4, coords.s5)),</div><div class="line"><a name="l00050"></a><span class="lineno"> 50</span>&#160; *((__global <a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a> *)<a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(in, coords.s6, coords.s7)));</div><div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;}</div><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>
382<div class="ttc" id="helpers_8h_xhtml_a009469e4d9b8fce3b6d5e97d2077827d"><div class="ttname"><a href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a></div><div class="ttdeci">__global uchar * offset(const Image *img, int x, int y)</div><div class="ttdoc">Get the pointer position of a Image. </div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00201">helpers.h:201</a></div></div>
383<div class="ttc" id="helpers_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="helpers_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a></div><div class="ttdeci">#define VEC_DATA_TYPE(type, size)</div><div class="ttdef"><b>Definition:</b> <a href="helpers_8h_source.xhtml#l00032">helpers.h:32</a></div></div>
384</div><!-- fragment -->
385</div>
386</div>
387</div><!-- contents -->
388</div><!-- doc-content -->
389<!-- start footer part -->
390<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
391 <ul>
392 <li class="navelem"><a class="el" href="dir_68267d1309a1af8e8297ef4c3efbcdba.xhtml">src</a></li><li class="navelem"><a class="el" href="dir_aebb8dcc11953d78e620bbef0b9e2183.xhtml">core</a></li><li class="navelem"><a class="el" href="dir_8c278f79c760e5c5fbd911f9870614c1.xhtml">CL</a></li><li class="navelem"><a class="el" href="dir_25885286e9dad4fa105b7b25a8031bbf.xhtml">cl_kernels</a></li><li class="navelem"><a class="el" href="warp__helpers_8h.xhtml">warp_helpers.h</a></li>
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395 <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.11 </li>
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