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<div id="projectname">NimbusKit
 <span id="projectnumber">1.2.1 - <a href="http://github.com/jverkoey/nimbus">Fork Nimbus on Github</a> - <a href="http://wiki.nimbuskit.info/">Visit the Nimbus Wiki</a></span>
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<div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">//</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment">// Copyright 2011-2014 NimbusKit</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment">//</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment">// you may not use this file except in compliance with the License.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment">// You may obtain a copy of the License at</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment">//</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment">//</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment">// Unless required by applicable law or agreed to in writing, software</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment">// See the License for the specific language governing permissions and</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment">// limitations under the License.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment">//</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> </div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="preprocessor">#import "NIImageProcessing.h"</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="preprocessor">#import "NimbusCore.h"</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> </div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="preprocessor">#if !defined(__has_feature) || !__has_feature(objc_arc)</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor"></span><span class="preprocessor">#error "Nimbus requires ARC support."</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="keyword">@implementation </span>NIImageProcessing</div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> + (CGRect)sourceRectWithImageSize:(CGSize)imageSize</div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span>  displaySize:(CGSize)displaySize</div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span>  contentMode:(UIViewContentMode)contentMode {</div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span>  <span class="keywordflow">if</span> (UIViewContentModeScaleToFill == contentMode) {</div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span>  <span class="comment">// Scale to fill draws the original image by squashing it to fit the destination's</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span>  <span class="comment">// aspect ratio, so the source and destination rects aren't modified.</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span>  <span class="keywordflow">return</span> CGRectMake(0, 0, imageSize.width, imageSize.height);</div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> </div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeScaleAspectFit == contentMode) {</div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span>  <span class="comment">// Aspect fit grabs the entire original image and squashes it down to a frame that fits</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span>  <span class="comment">// the destination and leaves the unfilled space transparent.</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span>  <span class="keywordflow">return</span> CGRectMake(0, 0, imageSize.width, imageSize.height);</div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeScaleAspectFill == contentMode) {</div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span>  <span class="comment">// Aspect fill requires that we take the destination rectangle and "fit" it within the</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span>  <span class="comment">// source rectangle; this gives us the area of the source image we'll crop out to draw into</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span>  <span class="comment">// the destination image.</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span>  CGFloat scale = MIN(imageSize.width / displaySize.width,</div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span>  imageSize.height / displaySize.height);</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span>  CGSize scaledDisplaySize = CGSizeMake(displaySize.width * scale, displaySize.height * scale);</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keywordflow">return</span> CGRectMake(floorf((imageSize.width - scaledDisplaySize.width) / 2),</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span>  floorf((imageSize.height - scaledDisplaySize.height) / 2),</div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  scaledDisplaySize.width,</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  scaledDisplaySize.height);</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> </div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeCenter == contentMode) {</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <span class="comment">// We need to cut out a hole the size of the display in the center of the source image.</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">return</span> CGRectMake(floorf((imageSize.width - displaySize.width) / 2),</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span>  floorf((imageSize.width - displaySize.width) / 2),</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span>  displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> </div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeTop == contentMode) {</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <span class="comment">// We need to cut out a hole the size of the display in the top center of the source image.</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keywordflow">return</span> CGRectMake(floorf((imageSize.width - displaySize.width) / 2),</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  0,</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> </div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeBottom == contentMode) {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="comment">// We need to cut out a hole the size of the display in the bottom center of the source image.</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">return</span> CGRectMake(floorf((imageSize.width - displaySize.width) / 2),</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  imageSize.height - displaySize.height,</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> </div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeLeft == contentMode) {</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="comment">// We need to cut out a hole the size of the display in the left center of the source image.</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> CGRectMake(0,</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span>  floorf((imageSize.width - displaySize.width) / 2),</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span>  displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> </div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeRight == contentMode) {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="comment">// We need to cut out a hole the size of the display in the right center of the source image.</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <span class="keywordflow">return</span> CGRectMake(imageSize.width - displaySize.width,</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  floorf((imageSize.width - displaySize.width) / 2),</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span>  displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> </div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeTopLeft == contentMode) {</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="comment">// We need to cut out a hole the size of the display in the top left of the source image.</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  <span class="keywordflow">return</span> CGRectMake(0,</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  0,</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeTopRight == contentMode) {</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  <span class="comment">// We need to cut out a hole the size of the display in the top right of the source image.</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  <span class="keywordflow">return</span> CGRectMake(imageSize.width - displaySize.width,</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  0,</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> </div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeBottomLeft == contentMode) {</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span>  <span class="comment">// We need to cut out a hole the size of the display in the bottom left of the source image.</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span>  <span class="keywordflow">return</span> CGRectMake(0,</div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span>  imageSize.height - displaySize.height,</div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> </div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeBottomRight == contentMode) {</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <span class="comment">// We need to cut out a hole the size of the display in the bottom right of the source image.</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <span class="keywordflow">return</span> CGRectMake(imageSize.width - displaySize.width,</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  imageSize.height - displaySize.height,</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> </div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="comment">// Not implemented</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  <a class="code" href="Debugging-Tools.html#gNIDERROR">NIDERROR</a>(<span class="stringliteral">@"The following content mode has not been implemented: %d"</span>, contentMode);</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">return</span> CGRectMake(0, 0, imageSize.width, imageSize.height);</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  }</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> }</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> </div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> + (CGRect)destinationRectWithImageSize:(CGSize)imageSize</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  displaySize:(CGSize)displaySize</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  contentMode:(UIViewContentMode)contentMode {</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <span class="keywordflow">if</span> (UIViewContentModeScaleAspectFit == contentMode) {</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  <span class="comment">// Fit the image right in the center of the source frame and maintain the aspect ratio.</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  CGFloat scale = MIN(displaySize.width / imageSize.width,</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  displaySize.height / imageSize.height);</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  CGSize scaledImageSize = CGSizeMake(imageSize.width * scale, imageSize.height * scale);</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordflow">return</span> CGRectMake(floorf((displaySize.width - scaledImageSize.width) / 2),</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span>  floorf((displaySize.height - scaledImageSize.height) / 2),</div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  scaledImageSize.width,</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  scaledImageSize.height);</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeScaleToFill == contentMode</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  || UIViewContentModeScaleAspectFill == contentMode</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  || UIViewContentModeCenter == contentMode</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  || UIViewContentModeTop == contentMode</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  || UIViewContentModeBottom == contentMode</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  || UIViewContentModeLeft == contentMode</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  || UIViewContentModeRight == contentMode</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  || UIViewContentModeTopLeft == contentMode</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  || UIViewContentModeTopRight == contentMode</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  || UIViewContentModeBottomLeft == contentMode</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  || UIViewContentModeBottomRight == contentMode) {</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  <span class="comment">// We're filling the entire destination, so the destination rect is the display rect.</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  <span class="keywordflow">return</span> CGRectMake(0, 0, displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> </div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="comment">// Not implemented</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  <a class="code" href="Debugging-Tools.html#gNIDERROR">NIDERROR</a>(<span class="stringliteral">@"The following content mode has not been implemented: %d"</span>, contentMode);</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  <span class="keywordflow">return</span> CGRectMake(0, 0, displaySize.width, displaySize.height);</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  }</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> }</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> + (UIImage *)imageFromSource:(UIImage *)src</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  withContentMode:(UIViewContentMode)contentMode</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  cropRect:(CGRect)cropRect</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span>  displaySize:(CGSize)displaySize</div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  scaleOptions:(<a class="code" href="NimbusNetworkImage.html#gNINetworkImageViewScaleOptions">NINetworkImageViewScaleOptions</a>)scaleOptions</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  interpolationQuality:(CGInterpolationQuality)interpolationQuality {</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> </div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  UIImage* resultImage = src;</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> </div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  CGImageRef srcImageRef = src.CGImage;</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  CGImageRef croppedImageRef = nil;</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  CGImageRef trimmedImageRef = nil;</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> </div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  CGRect srcRect = CGRectMake(0, 0, src.size.width, src.size.height);</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="comment">// Cropping</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span>  <span class="keywordflow">if</span> (!CGRectIsEmpty(cropRect)</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  && !CGRectEqualToRect(cropRect, CGRectMake(0, 0, 1, 1))) {</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  CGRect innerRect = CGRectMake(floorf(src.size.width * cropRect.origin.x),</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  floorf(src.size.height * cropRect.origin.y),</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  floorf(src.size.width * cropRect.size.width),</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  floorf(src.size.height * cropRect.size.height));</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> </div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  <span class="comment">// Create a new image containing only the cropped inner rect.</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  srcImageRef = CGImageCreateWithImageInRect(srcImageRef, innerRect);</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  croppedImageRef = srcImageRef;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> </div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  <span class="comment">// This new image will likely have a different width and height, so we have to update</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  <span class="comment">// the source rect as a result.</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  srcRect = CGRectMake(0, 0, CGRectGetWidth(innerRect), CGRectGetHeight(innerRect));</div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  }</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> </div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="comment">// Display</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  <span class="keywordflow">if</span> (0 < displaySize.width</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  && 0 < displaySize.height) {</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> </div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span>  <span class="keywordflow">if</span> ((NINetworkImageViewScaleToFillLeavesExcess</div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span>  == (NINetworkImageViewScaleToFillLeavesExcess & scaleOptions))</div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  && UIViewContentModeScaleAspectFill == contentMode) {</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  <span class="comment">// Make the display size match the aspect ratio of the source image by growing the</span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="comment">// display size.</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  CGFloat imageAspectRatio = srcRect.size.width / srcRect.size.height;</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  CGFloat displayAspectRatio = displaySize.width / displaySize.height;</div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> </div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">if</span> (imageAspectRatio > displayAspectRatio) {</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="comment">// The image is wider than the display, so let's increase the width.</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  displaySize.width = displaySize.height * imageAspectRatio;</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (imageAspectRatio < displayAspectRatio) {</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  <span class="comment">// The image is taller than the display, so let's increase the height.</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  displaySize.height = displaySize.width * (srcRect.size.height / srcRect.size.width);</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> </div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((NINetworkImageViewScaleToFitCropsExcess</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  == (NINetworkImageViewScaleToFitCropsExcess & scaleOptions))</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  && UIViewContentModeScaleAspectFit == contentMode) {</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="comment">// Make the display size match the aspect ratio of the source image by shrinking the</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  <span class="comment">// display size.</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  CGFloat imageAspectRatio = srcRect.size.width / srcRect.size.height;</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  CGFloat displayAspectRatio = displaySize.width / displaySize.height;</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> </div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span>  <span class="keywordflow">if</span> (imageAspectRatio > displayAspectRatio) {</div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span>  <span class="comment">// The image is wider than the display, so let's decrease the height.</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span>  displaySize.height = displaySize.width * (srcRect.size.height / srcRect.size.width);</div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> </div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (imageAspectRatio < displayAspectRatio) {</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  <span class="comment">// The image is taller than the display, so let's decrease the width.</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  displaySize.width = displaySize.height * imageAspectRatio;</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  }</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  }</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> </div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  CGRect srcCropRect = [<span class="keyword">self</span> sourceRectWithImageSize: srcRect.size</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  displaySize: displaySize</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  contentMode: contentMode];</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  srcCropRect = CGRectMake(floorf(srcCropRect.origin.x),</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  floorf(srcCropRect.origin.y),</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  roundf(srcCropRect.size.width),</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  roundf(srcCropRect.size.height));</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="comment">// Do we need to crop the source?</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <span class="keywordflow">if</span> (!CGRectEqualToRect(srcCropRect, srcRect)) {</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  srcImageRef = CGImageCreateWithImageInRect(srcImageRef, srcCropRect);</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  trimmedImageRef = srcImageRef;</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> </div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  srcRect = CGRectMake(0, 0,</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  CGRectGetWidth(srcCropRect),</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  CGRectGetHeight(srcCropRect));</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> </div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span>  <span class="comment">// Release the cropped image source to reduce this thread's memory consumption.</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span>  <span class="keywordflow">if</span> (nil != croppedImageRef) {</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  CGImageRelease(croppedImageRef);</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  croppedImageRef = nil;</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  }</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  }</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> </div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <span class="comment">// Calcuate the destination frame.</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  CGRect dstBlitRect = [<span class="keyword">self</span> destinationRectWithImageSize: srcRect.size</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  displaySize: displaySize</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  contentMode: contentMode];</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  dstBlitRect = CGRectMake(floorf(dstBlitRect.origin.x),</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  floorf(dstBlitRect.origin.y),</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  roundf(dstBlitRect.size.width),</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  roundf(dstBlitRect.size.height));</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> </div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="comment">// Round any remainder on the display size dimensions.</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  displaySize = CGSizeMake(roundf(displaySize.width), roundf(displaySize.height));</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span> </div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  <span class="comment">// See table "Supported Pixel Formats" in the following guide for support iOS bitmap formats:</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span>  <span class="comment">// http://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_context/dq_context.html</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  CGBitmapInfo bmi = kCGImageAlphaPremultipliedLast;</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> </div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  <span class="comment">// For screen sizes with higher resolutions, we create a larger image with a scale value</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <span class="comment">// so that it appears crisper on the screen.</span></div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span>  CGFloat screenScale = <a class="code" href="SDK-Availability.html#gNIScreenScale">NIScreenScale</a>();</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> </div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="comment">// Create our final composite image.</span></div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  CGContextRef dstBmp = CGBitmapContextCreate(NULL,</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  displaySize.width * screenScale,</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  displaySize.height * screenScale,</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span>  8,</div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  0,</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  colorSpace,</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  bmi);</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> </div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  <span class="comment">// If this fails then we're likely creating an invalid bitmap and shit's about to go down.</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  <span class="comment">// In production this will fail somewhat gracefully, in that we'll end up just using the</span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="comment">// source image instead of the cropped and resized image.</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  NIDASSERT(nil != dstBmp);</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> </div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  <span class="keywordflow">if</span> (nil != dstBmp) {</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  CGRect dstRect = CGRectMake(0, 0,</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  displaySize.width * screenScale,</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  displaySize.height * screenScale);</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> </div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span>  <span class="comment">// Render the source image into the destination image.</span></div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  CGContextClearRect(dstBmp, dstRect);</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  CGContextSetInterpolationQuality(dstBmp, interpolationQuality);</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> </div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  CGRect scaledBlitRect = CGRectMake(dstBlitRect.origin.x * screenScale,</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  dstBlitRect.origin.y * screenScale,</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  dstBlitRect.size.width * screenScale,</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  dstBlitRect.size.height * screenScale);</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  CGContextDrawImage(dstBmp, scaledBlitRect, srcImageRef);</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> </div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  CGImageRef resultImageRef = CGBitmapContextCreateImage(dstBmp);</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  <span class="keywordflow">if</span> (nil != resultImageRef) {</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  resultImage = [UIImage imageWithCGImage:resultImageRef</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  scale:screenScale</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  orientation:src.imageOrientation];</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  CGImageRelease(resultImageRef);</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  }</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> </div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  CGContextRelease(dstBmp);</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  }</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> </div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  CGColorSpaceRelease(colorSpace);</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> </div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (nil != croppedImageRef) {</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  resultImage = [UIImage imageWithCGImage:srcImageRef];</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  }</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> </div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  <span class="comment">// Memory cleanup.</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keywordflow">if</span> (nil != trimmedImageRef) {</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  CGImageRelease(trimmedImageRef);</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  }</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">if</span> (nil != croppedImageRef) {</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  CGImageRelease(croppedImageRef);</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  }</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> </div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span>  <span class="keywordflow">return</span> resultImage;</div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> }</div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> </div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="keyword">@end</span></div>
<div class="ttc" id="NimbusNetworkImage_html_gNINetworkImageViewScaleOptions"><div class="ttname"><a href="NimbusNetworkImage.html#gNINetworkImageViewScaleOptions">NINetworkImageViewScaleOptions</a></div><div class="ttdeci">NINetworkImageViewScaleOptions</div><div class="ttdoc">Flags for modifying the way cropping is handled when scaling images to fit or fill. </div><div class="ttdef"><b>Definition:</b> <a href="NINetworkImageView_8h_source.html#l00041">NINetworkImageView.h:41</a></div></div>
<div class="ttc" id="Debugging-Tools_html_gNIDERROR"><div class="ttname"><a href="Debugging-Tools.html#gNIDERROR">NIDERROR</a></div><div class="ttdeci">#define NIDERROR(xx,...)</div><div class="ttdoc">Only writes to the log if NIMaxLogLevel >= NILOGLEVEL_ERROR. </div><div class="ttdef"><b>Definition:</b> <a href="NIDebuggingTools_8h_source.html#l00181">NIDebuggingTools.h:181</a></div></div>
<div class="ttc" id="SDK-Availability_html_gNIScreenScale"><div class="ttname"><a href="SDK-Availability.html#gNIScreenScale">NIScreenScale</a></div><div class="ttdeci">CGFloat NIScreenScale(void)</div><div class="ttdoc">Fetch the screen's scale. </div><div class="ttdef"><b>Definition:</b> <a href="NISDKAvailability_8m_source.html#l00058">NISDKAvailability.m:58</a></div></div>
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