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119 <div class="title">scharr_filter.cl File Reference</div> </div>
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122 <div class="textblock"><code>#include "<a class="el" href="helpers_8h_source.xhtml">helpers.h</a>"</code><br />
124 <p><a href="scharr__filter_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:a7cc764a3a8a92f986344e05cfb1fe75a"><td class="memItemLeft" align="right" valign="top">__kernel void </td><td class="memItemRight" valign="bottom"><a class="el" href="scharr__filter_8cl.xhtml#a7cc764a3a8a92f986344e05cfb1fe75a">scharr3x3</a> (__global uchar *src_ptr, uint src_stride_x, uint src_step_x, uint src_stride_y, uint src_step_y, uint src_offset_first_element_in_bytes, __global uchar *dst_gx_ptr, uint dst_gx_stride_x, uint dst_gx_step_x, uint dst_gx_stride_y, uint dst_gx_step_y, uint dst_gx_offset_first_element_in_bytes, __global uchar *dst_gy_ptr, uint dst_gy_stride_x, uint dst_gy_step_x, uint dst_gy_stride_y, uint dst_gy_step_y, uint dst_gy_offset_first_element_in_bytes)</td></tr>
129 <tr class="memdesc:a7cc764a3a8a92f986344e05cfb1fe75a"><td class="mdescLeft"> </td><td class="mdescRight">This OpenCL kernel computes Scharr3x3. <a href="#a7cc764a3a8a92f986344e05cfb1fe75a">More...</a><br /></td></tr>
130 <tr class="separator:a7cc764a3a8a92f986344e05cfb1fe75a"><td class="memSeparator" colspan="2"> </td></tr>
132 <h2 class="groupheader">Function Documentation</h2>
133 <a class="anchor" id="a7cc764a3a8a92f986344e05cfb1fe75a"></a>
134 <div class="memitem">
135 <div class="memproto">
136 <table class="memname">
138 <td class="memname">__kernel void scharr3x3 </td>
140 <td class="paramtype">__global uchar * </td>
141 <td class="paramname"><em>src_ptr</em>, </td>
144 <td class="paramkey"></td>
146 <td class="paramtype">uint </td>
147 <td class="paramname"><em>src_stride_x</em>, </td>
150 <td class="paramkey"></td>
152 <td class="paramtype">uint </td>
153 <td class="paramname"><em>src_step_x</em>, </td>
156 <td class="paramkey"></td>
158 <td class="paramtype">uint </td>
159 <td class="paramname"><em>src_stride_y</em>, </td>
162 <td class="paramkey"></td>
164 <td class="paramtype">uint </td>
165 <td class="paramname"><em>src_step_y</em>, </td>
168 <td class="paramkey"></td>
170 <td class="paramtype">uint </td>
171 <td class="paramname"><em>src_offset_first_element_in_bytes</em>, </td>
174 <td class="paramkey"></td>
176 <td class="paramtype">__global uchar * </td>
177 <td class="paramname"><em>dst_gx_ptr</em>, </td>
180 <td class="paramkey"></td>
182 <td class="paramtype">uint </td>
183 <td class="paramname"><em>dst_gx_stride_x</em>, </td>
186 <td class="paramkey"></td>
188 <td class="paramtype">uint </td>
189 <td class="paramname"><em>dst_gx_step_x</em>, </td>
192 <td class="paramkey"></td>
194 <td class="paramtype">uint </td>
195 <td class="paramname"><em>dst_gx_stride_y</em>, </td>
198 <td class="paramkey"></td>
200 <td class="paramtype">uint </td>
201 <td class="paramname"><em>dst_gx_step_y</em>, </td>
204 <td class="paramkey"></td>
206 <td class="paramtype">uint </td>
207 <td class="paramname"><em>dst_gx_offset_first_element_in_bytes</em>, </td>
210 <td class="paramkey"></td>
212 <td class="paramtype">__global uchar * </td>
213 <td class="paramname"><em>dst_gy_ptr</em>, </td>
216 <td class="paramkey"></td>
218 <td class="paramtype">uint </td>
219 <td class="paramname"><em>dst_gy_stride_x</em>, </td>
222 <td class="paramkey"></td>
224 <td class="paramtype">uint </td>
225 <td class="paramname"><em>dst_gy_step_x</em>, </td>
228 <td class="paramkey"></td>
230 <td class="paramtype">uint </td>
231 <td class="paramname"><em>dst_gy_stride_y</em>, </td>
234 <td class="paramkey"></td>
236 <td class="paramtype">uint </td>
237 <td class="paramname"><em>dst_gy_step_y</em>, </td>
240 <td class="paramkey"></td>
242 <td class="paramtype">uint </td>
243 <td class="paramname"><em>dst_gy_offset_first_element_in_bytes</em> </td>
251 </div><div class="memdoc">
253 <p>This OpenCL kernel computes Scharr3x3. </p>
254 <dl class="section attention"><dt>Attention</dt><dd>To enable computation of the X gradient -DGRAD_X must be passed at compile time, while computation of the Y gradient is performed when -DGRAD_Y is used. You can use both when computation of both gradients is required.</dd></dl>
255 <dl class="params"><dt>Parameters</dt><dd>
256 <table class="params">
257 <tr><td class="paramdir">[in]</td><td class="paramname">src_ptr</td><td>Pointer to the source image. Supported data types: U8 </td></tr>
258 <tr><td class="paramdir">[in]</td><td class="paramname">src_stride_x</td><td>Stride of the source image in X dimension (in bytes) </td></tr>
259 <tr><td class="paramdir">[in]</td><td class="paramname">src_step_x</td><td>src_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
260 <tr><td class="paramdir">[in]</td><td class="paramname">src_stride_y</td><td>Stride of the source image in Y dimension (in bytes) </td></tr>
261 <tr><td class="paramdir">[in]</td><td class="paramname">src_step_y</td><td>src_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
262 <tr><td class="paramdir">[in]</td><td class="paramname">src_offset_first_element_in_bytes</td><td>The offset of the first element in the source image </td></tr>
263 <tr><td class="paramdir">[out]</td><td class="paramname">dst_gx_ptr</td><td>Pointer to the destination image Supported data types: S16 </td></tr>
264 <tr><td class="paramdir">[in]</td><td class="paramname">dst_gx_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
265 <tr><td class="paramdir">[in]</td><td class="paramname">dst_gx_step_x</td><td>dst_gx_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
266 <tr><td class="paramdir">[in]</td><td class="paramname">dst_gx_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
267 <tr><td class="paramdir">[in]</td><td class="paramname">dst_gx_step_y</td><td>dst_gx_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
268 <tr><td class="paramdir">[in]</td><td class="paramname">dst_gx_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
269 <tr><td class="paramdir">[out]</td><td class="paramname">dst_gy_ptr</td><td>Pointer to the destination image. Supported data types: S16 </td></tr>
270 <tr><td class="paramdir">[in]</td><td class="paramname">dst_gy_stride_x</td><td>Stride of the destination image in X dimension (in bytes) </td></tr>
271 <tr><td class="paramdir">[in]</td><td class="paramname">dst_gy_step_x</td><td>dst_gy_stride_x * number of elements along X processed per workitem(in bytes) </td></tr>
272 <tr><td class="paramdir">[in]</td><td class="paramname">dst_gy_stride_y</td><td>Stride of the destination image in Y dimension (in bytes) </td></tr>
273 <tr><td class="paramdir">[in]</td><td class="paramname">dst_gy_step_y</td><td>dst_gy_stride_y * number of elements along Y processed per workitem(in bytes) </td></tr>
274 <tr><td class="paramdir">[in]</td><td class="paramname">dst_gy_offset_first_element_in_bytes</td><td>The offset of the first element in the destination image </td></tr>
279 <p>Definition at line <a class="el" href="scharr__filter_8cl_source.xhtml#l00050">50</a> of file <a class="el" href="scharr__filter_8cl_source.xhtml">scharr_filter.cl</a>.</p>
281 <p>References <a class="el" href="helpers_8h_source.xhtml#l00104">CONVERT_TO_IMAGE_STRUCT</a>, <a class="el" href="helpers_8h_source.xhtml#l00303">offset()</a>, <a class="el" href="helpers_8h_source.xhtml#l00144">Image::ptr</a>, and <a class="el" href="_c_l_2_convolution_8cpp_source.xhtml#l00147">arm_compute::test::validation::src</a>.</p>
282 <div class="fragment"><div class="line"><a name="l00061"></a><span class="lineno"> 61</span> {</div><div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <a class="code" href="struct_image.xhtml">Image</a> <a class="code" href="namespacearm__compute_1_1test_1_1validation.xhtml#a6743f0a130e8311e6f5b1a23df102472">src</a> = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(src);</div><div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#ifdef GRAD_X</span></div><div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <a class="code" href="struct_image.xhtml">Image</a> dst_gx = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(dst_gx);</div><div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_X */</span><span class="preprocessor"></span></div><div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor">#ifdef GRAD_Y</span></div><div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <a class="code" href="struct_image.xhtml">Image</a> dst_gy = <a class="code" href="helpers_8h.xhtml#aebe814363556c244be043b13e7969197">CONVERT_TO_IMAGE_STRUCT</a>(dst_gy);</div><div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_Y */</span><span class="preprocessor"></span></div><div class="line"><a name="l00069"></a><span class="lineno"> 69</span> </div><div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="comment">// Output pixels</span></div><div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor">#ifdef GRAD_X</span></div><div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  short8 gx = (short8)0;</div><div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_X */</span><span class="preprocessor"></span></div><div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor">#ifdef GRAD_Y</span></div><div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  short8 gy = (short8)0;</div><div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_Y */</span><span class="preprocessor"></span></div><div class="line"><a name="l00077"></a><span class="lineno"> 77</span> </div><div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="comment">// Row0</span></div><div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  uchar16 temp = vload16(0, <a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&src, -1, -1));</div><div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  short8 left = convert_short8(temp.s01234567);</div><div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  short8 middle = convert_short8(temp.s12345678);</div><div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  short8 right = convert_short8(temp.s23456789);</div><div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor">#ifdef GRAD_X</span></div><div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  gx += left * (short8)(-3);</div><div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  gx += right * (short8)(+3);</div><div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_X */</span><span class="preprocessor"></span></div><div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor">#ifdef GRAD_Y</span></div><div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  gy += left * (short8)(-3);</div><div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  gy += middle * (short8)(-10);</div><div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  gy += right * (short8)(-3);</div><div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_Y */</span><span class="preprocessor"></span></div><div class="line"><a name="l00092"></a><span class="lineno"> 92</span> </div><div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="comment">// Row1</span></div><div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  temp = vload16(0, <a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&src, -1, 0));</div><div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  left = convert_short8(temp.s01234567);</div><div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  right = convert_short8(temp.s23456789);</div><div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#ifdef GRAD_X</span></div><div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  gx += left * (short8)(-10);</div><div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  gx += right * (short8)(+10);</div><div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_X */</span><span class="preprocessor"></span></div><div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div><div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  <span class="comment">// Row2</span></div><div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  temp = vload16(0, <a class="code" href="helpers_8h.xhtml#a009469e4d9b8fce3b6d5e97d2077827d">offset</a>(&src, -1, 1));</div><div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  left = convert_short8(temp.s01234567);</div><div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  middle = convert_short8(temp.s12345678);</div><div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  right = convert_short8(temp.s23456789);</div><div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="preprocessor">#ifdef GRAD_X</span></div><div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  gx += left * (short8)(-3);</div><div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  gx += right * (short8)(+3);</div><div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_X */</span><span class="preprocessor"></span></div><div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="preprocessor">#ifdef GRAD_Y</span></div><div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  gy += left * (short8)(+3);</div><div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  gy += middle * (short8)(+10);</div><div class="line"><a name="l00114"></a><span class="lineno"> 114</span>  gy += right * (short8)(+3);</div><div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_Y */</span><span class="preprocessor"></span></div><div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div><div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="comment">// Store results</span></div><div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="preprocessor">#ifdef GRAD_X</span></div><div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  vstore8(gx, 0, ((__global <span class="keywordtype">short</span> *)dst_gx.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>));</div><div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_X */</span><span class="preprocessor"></span></div><div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="preprocessor">#ifdef GRAD_Y</span></div><div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  vstore8(gy, 0, ((__global <span class="keywordtype">short</span> *)dst_gy.<a class="code" href="struct_image.xhtml#acf52c23cbd7424606c10a606524e3e32">ptr</a>));</div><div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="preprocessor">#endif </span><span class="comment">/* GRAD_Y */</span><span class="preprocessor"></span></div><div class="line"><a name="l00124"></a><span class="lineno"> 124</span> }</div><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#l00303">helpers.h:303</a></div></div>
283 <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#l00104">helpers.h:104</a></div></div>
284 <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#l00142">helpers.h:142</a></div></div>
285 <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#l00144">helpers.h:144</a></div></div>
286 <div class="ttc" id="namespacearm__compute_1_1test_1_1validation_xhtml_a6743f0a130e8311e6f5b1a23df102472"><div class="ttname"><a href="namespacearm__compute_1_1test_1_1validation.xhtml#a6743f0a130e8311e6f5b1a23df102472">arm_compute::test::validation::src</a></div><div class="ttdeci">convolution configure & src</div><div class="ttdef"><b>Definition:</b> <a href="_c_l_2_convolution_8cpp_source.xhtml#l00147">Convolution.cpp:147</a></div></div>
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