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gerrit-public.fairphone.software / platform / external / ComputeLibrary / 8938bd3f40ea62ff56d6ed4e2db0a8aee34dd64a / . / documentation / warp__helpers_8h.xhtml
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Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]120<div class="textblock"><code>#include &quot;<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>&quot;</code><br/>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]121</div>
122<p><a href="warp__helpers_8h_source.xhtml">Go to the source code of this file.</a></p>
123<table class="memberdecls">
124<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
125Functions</h2></td></tr>
126<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]127<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>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]128<tr class="separator:adbdf2ca9e8fe0b67f9359929ef743126"><td class="memSeparator" colspan="2">&#160;</td></tr>
129<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]130<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>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]131<tr class="separator:aba42442a4c991cdbb52727fa370676f1"><td class="memSeparator" colspan="2">&#160;</td></tr>
132<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]133<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>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]134<tr class="separator:a4caaeeb51ea58015267a9974675226d1"><td class="memSeparator" colspan="2">&#160;</td></tr>
135<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]136<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>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]137<tr class="separator:a2d8047717d6464cad02c5979d09576db"><td class="memSeparator" colspan="2">&#160;</td></tr>
138<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]139<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>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]140<tr class="separator:abea9f226daf3e0ad741d03cf7417d353"><td class="memSeparator" colspan="2">&#160;</td></tr>
141</table>
142<h2 class="groupheader">Function Documentation</h2>
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151 <td class="memname">const DATA_TYPE4 bilinear_interpolate </td>
152 <td>(</td>
153 <td class="paramtype">const <a class="el" href="struct_image.xhtml">Image</a> *&#160;</td>
154 <td class="paramname"><em>in</em>, </td>
155 </tr>
156 <tr>
157 <td class="paramkey"></td>
158 <td></td>
159 <td class="paramtype">const float8&#160;</td>
160 <td class="paramname"><em>coords</em>, </td>
161 </tr>
162 <tr>
163 <td class="paramkey"></td>
164 <td></td>
165 <td class="paramtype">const float&#160;</td>
166 <td class="paramname"><em>width</em>, </td>
167 </tr>
168 <tr>
169 <td class="paramkey"></td>
170 <td></td>
171 <td class="paramtype">const float&#160;</td>
172 <td class="paramname"><em>height</em>&#160;</td>
173 </tr>
174 <tr>
175 <td></td>
176 <td>)</td>
177 <td></td><td></td>
178 </tr>
179 </table>
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186
187<p>Computes the bilinear interpolation for each set of coordinates in the vector coords and returns the values. </p>
188<dl class="params"><dt>Parameters</dt><dd>
189 <table class="params">
190 <tr><td class="paramdir">[in]</td><td class="paramname">in</td><td>Pointer to the source image. </td></tr>
191 <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>
192 <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>Width of the image </td></tr>
193 <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the image </td></tr>
194 </table>
195 </dd>
196</dl>
197
198<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>
199
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]200<p>References <a class="el" href="warp__helpers_8h_source.xhtml#l00033">clamp_to_border()</a>, <a class="el" href="fixed__point_8h_source.xhtml#l00098">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#l00292">offset()</a>, and <a class="el" href="fixed__point_8h_source.xhtml#l00093">VEC_DATA_TYPE</a>.</p>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]201
202<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]203<div class="fragment"><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>&#160;{</div>
204<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>
205<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>&#160;</div>
206<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>
207<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>&#160; <span class="keyword">const</span> float8 fc = floor(coords);</div>
208<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>&#160; <span class="keyword">const</span> float16 c1 = (float16)(</div>
209<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>
210<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>
211<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>&#160; <span class="keyword">const</span> float16 c2 = (float16)(</div>
212<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>
213<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>
214<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>
215<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>&#160; <span class="keyword">const</span> float16 t = (float16)(</div>
216<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>&#160; <span class="comment">/* tl, tr, bl, br */</span></div>
217<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>
218<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>
219<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>
220<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>
221<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>
222<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>
223<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>
224<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>
225<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>&#160; <span class="keyword">const</span> float8 a = coords - fc;</div>
226<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>
227<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>&#160; <span class="keyword">const</span> float4 fr = (float4)(</div>
228<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>
229<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>
230<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>
231<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>
232<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>&#160; <span class="keywordflow">return</span> <a class="code" href="fixed__point_8h.xhtml#aa8d95ba04fc73845abc6045952cae5be">CONVERT</a>(fr, <a class="code" href="fixed__point_8h.xhtml#a36f754c05b6fddf6df0d8d0a74f8159f">VEC_DATA_TYPE</a>(<a class="code" href="convolution3x3_8cl.xhtml#afb8c72ce35c4a1f4a2588d6573e54aa1">DATA_TYPE</a>, 4));</div>
233<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>&#160;}</div>
234<div class="ttc" id="fixed__point_8h_xhtml_aa8d95ba04fc73845abc6045952cae5be"><div class="ttname"><a href="fixed__point_8h.xhtml#aa8d95ba04fc73845abc6045952cae5be">CONVERT</a></div><div class="ttdeci">#define CONVERT(x, type)</div><div class="ttdef"><b>Definition:</b> <a href="fixed__point_8h_source.xhtml#l00098">fixed_point.h:98</a></div></div>
235<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>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]236<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]237<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#l00292">helpers.h:292</a></div></div>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]238<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]239<div class="ttc" id="fixed__point_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="fixed__point_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="fixed__point_8h_source.xhtml#l00093">fixed_point.h:93</a></div></div>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]240</div><!-- fragment -->
241</div>
242</div>
243<a class="anchor" id="adbdf2ca9e8fe0b67f9359929ef743126"></a>
244<div class="memitem">
245<div class="memproto">
246<table class="mlabels">
247 <tr>
248 <td class="mlabels-left">
249 <table class="memname">
250 <tr>
251 <td class="memname">const float8 clamp_to_border </td>
252 <td>(</td>
253 <td class="paramtype">float8&#160;</td>
254 <td class="paramname"><em>coords</em>, </td>
255 </tr>
256 <tr>
257 <td class="paramkey"></td>
258 <td></td>
259 <td class="paramtype">const float&#160;</td>
260 <td class="paramname"><em>width</em>, </td>
261 </tr>
262 <tr>
263 <td class="paramkey"></td>
264 <td></td>
265 <td class="paramtype">const float&#160;</td>
266 <td class="paramname"><em>height</em>&#160;</td>
267 </tr>
268 <tr>
269 <td></td>
270 <td>)</td>
271 <td></td><td></td>
272 </tr>
273 </table>
274 </td>
275 <td class="mlabels-right">
276<span class="mlabels"><span class="mlabel">inline</span></span> </td>
277 </tr>
278</table>
279</div><div class="memdoc">
280
281<p>Clamps the given coordinates to the borders. </p>
282<dl class="params"><dt>Parameters</dt><dd>
283 <table class="params">
284 <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>
285 <tr><td class="paramdir">[in]</td><td class="paramname">width</td><td>Width of the image </td></tr>
286 <tr><td class="paramdir">[in]</td><td class="paramname">height</td><td>Height of the image </td></tr>
287 </table>
288 </dd>
289</dl>
290
291<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>
292
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]293<p>References <a class="el" href="arm__compute_2core_2_helpers_8h_source.xhtml#l00201">arm_compute::clamp()</a>.</p>
Anthony Barbierdbdab852017-06-23 15:42:00 +0100[diff] [blame]294
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]295<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#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>, and <a class="el" href="warp__perspective_8cl_source.xhtml#l00087">warp_perspective_nearest_neighbour()</a>.</p>
296<div class="fragment"><div class="line"><a name="l00034"></a><span class="lineno"> 34</span>&#160;{</div>
297<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>&#160; <span class="keyword">const</span> float4 clamped_x = <a class="code" href="namespacearm__compute.xhtml#a1c0b9414fe3a6ef6a7a23bd324ae9e67">clamp</a>(coords.even, -1.0f, width);</div>
298<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>&#160; <span class="keyword">const</span> float4 clamped_y = <a class="code" href="namespacearm__compute.xhtml#a1c0b9414fe3a6ef6a7a23bd324ae9e67">clamp</a>(coords.odd, -1.0f, height);</div>
299<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>
300<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>&#160;}</div>
301<div class="ttc" id="namespacearm__compute_xhtml_a1c0b9414fe3a6ef6a7a23bd324ae9e67"><div class="ttname"><a href="namespacearm__compute.xhtml#a1c0b9414fe3a6ef6a7a23bd324ae9e67">arm_compute::clamp</a></div><div class="ttdeci">T clamp(const T &amp;n, const T &amp;lower, const T &amp;upper)</div><div class="ttdoc">Performs clamping among a lower and upper value. </div><div class="ttdef"><b>Definition:</b> <a href="arm__compute_2core_2_helpers_8h_source.xhtml#l00201">Helpers.h:201</a></div></div>
Anthony Barbierdbdab852017-06-23 15:42:00 +0100[diff] [blame]302</div><!-- fragment -->
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]303</div>
304</div>
305<a class="anchor" id="a4caaeeb51ea58015267a9974675226d1"></a>
306<div class="memitem">
307<div class="memproto">
308<table class="mlabels">
309 <tr>
310 <td class="mlabels-left">
311 <table class="memname">
312 <tr>
313 <td class="memname">const float2 get_current_coords </td>
314 <td>(</td>
315 <td class="paramname"></td><td>)</td>
316 <td></td>
317 </tr>
318 </table>
319 </td>
320 <td class="mlabels-right">
321<span class="mlabels"><span class="mlabel">inline</span></span> </td>
322 </tr>
323</table>
324</div><div class="memdoc">
325
326<p>Returns the current thread coordinates. </p>
327
328<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>
329
330<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]331<div class="fragment"><div class="line"><a name="l00055"></a><span class="lineno"> 55</span>&#160;{</div>
332<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>
333<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>&#160;}</div>
334</div><!-- fragment -->
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]335</div>
336</div>
337<a class="anchor" id="a2d8047717d6464cad02c5979d09576db"></a>
338<div class="memitem">
339<div class="memproto">
340<table class="mlabels">
341 <tr>
342 <td class="mlabels-left">
343 <table class="memname">
344 <tr>
345 <td class="memname">const float8 get_neighbour_coords </td>
346 <td>(</td>
347 <td class="paramtype">const float2&#160;</td>
348 <td class="paramname"><em>coord</em></td><td>)</td>
349 <td></td>
350 </tr>
351 </table>
352 </td>
353 <td class="mlabels-right">
354<span class="mlabels"><span class="mlabel">inline</span></span> </td>
355 </tr>
356</table>
357</div><div class="memdoc">
358
359<p>Given a texel coordinates this function will return the following array of coordinates: [ P, right neighbour, below neighbour, below right neighbour ]. </p>
360<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>
361<dl class="params"><dt>Parameters</dt><dd>
362 <table class="params">
363 <tr><td class="paramdir">[in]</td><td class="paramname">coord</td><td>Input coordinates</td></tr>
364 </table>
365 </dd>
366</dl>
367<dl class="section return"><dt>Returns</dt><dd>vector of 8 floats with the coordinates, even positions are x and odd y. </dd></dl>
368
369<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>
370
371<p>Referenced by <a class="el" href="warp__helpers_8h_source.xhtml#l00080">bilinear_interpolate()</a>.</p>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]372<div class="fragment"><div class="line"><a name="l00069"></a><span class="lineno"> 69</span>&#160;{</div>
373<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>
374<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>&#160;}</div>
375</div><!-- fragment -->
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]376</div>
377</div>
378<a class="anchor" id="aba42442a4c991cdbb52727fa370676f1"></a>
379<div class="memitem">
380<div class="memproto">
381<table class="mlabels">
382 <tr>
383 <td class="mlabels-left">
384 <table class="memname">
385 <tr>
386 <td class="memname">const DATA_TYPE4 read_texels4 </td>
387 <td>(</td>
388 <td class="paramtype">const <a class="el" href="struct_image.xhtml">Image</a> *&#160;</td>
389 <td class="paramname"><em>in</em>, </td>
390 </tr>
391 <tr>
392 <td class="paramkey"></td>
393 <td></td>
394 <td class="paramtype">const int8&#160;</td>
395 <td class="paramname"><em>coords</em>&#160;</td>
396 </tr>
397 <tr>
398 <td></td>
399 <td>)</td>
400 <td></td><td></td>
401 </tr>
402 </table>
403 </td>
404 <td class="mlabels-right">
405<span class="mlabels"><span class="mlabel">inline</span></span> </td>
406 </tr>
407</table>
408</div><div class="memdoc">
409
410<p>Reads four texels from the input image. </p>
411<p>The coords vector is used to determine which texels to be read.</p>
412<dl class="params"><dt>Parameters</dt><dd>
413 <table class="params">
414 <tr><td class="paramdir">[in]</td><td class="paramname">in</td><td>Pointer to the source image. </td></tr>
415 <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>
416 </table>
417 </dd>
418</dl>
419
420<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>
421
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]422<p>References <a class="el" href="convolution3x3_8cl_source.xhtml#l00027">DATA_TYPE</a>, <a class="el" href="helpers_8h_source.xhtml#l00292">offset()</a>, and <a class="el" href="fixed__point_8h_source.xhtml#l00093">VEC_DATA_TYPE</a>.</p>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]423
424<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>
Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]425<div class="fragment"><div class="line"><a name="l00046"></a><span class="lineno"> 46</span>&#160;{</div>
426<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>&#160; <span class="keywordflow">return</span> (<a class="code" href="fixed__point_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>
427<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>
428<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>
429<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>
430<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>&#160;}</div>
431<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>
432<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#l00292">helpers.h:292</a></div></div>
433<div class="ttc" id="fixed__point_8h_xhtml_a36f754c05b6fddf6df0d8d0a74f8159f"><div class="ttname"><a href="fixed__point_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="fixed__point_8h_source.xhtml#l00093">fixed_point.h:93</a></div></div>
Anthony Barbier871448e2017-03-24 14:54:29 +0000[diff] [blame]434</div><!-- fragment -->
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Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]442 <li class="navelem"><a class="el" href="dir_55b5a5006e943fb664ff8cff3cfe7768.xhtml">src</a></li><li class="navelem"><a class="el" href="dir_f6c3ae42d7e27145d0a3c3e38ca1c000.xhtml">core</a></li><li class="navelem"><a class="el" href="dir_1b7ae9123c88e650426d50d95c19d414.xhtml">CL</a></li><li class="navelem"><a class="el" href="dir_b7c3d80b0dadb2139bc73b7161751c12.xhtml">cl_kernels</a></li><li class="navelem"><a class="el" href="warp__helpers_8h.xhtml">warp_helpers.h</a></li>
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Kaizen8938bd32017-09-28 14:38:23 +0100[diff] [blame^]445 <img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.8.6 </li>
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