-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy path_n_i_network_image_request_8m_source.html
503 lines (482 loc) · 38.4 KB
/
_n_i_network_image_request_8m_source.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<title>Nimbus: src/networkimage/src/NINetworkImageRequest.m Source File</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="navtree.css" rel="stylesheet" type="text/css"/>
<script type="text/javascript" src="jquery.js"></script>
<script type="text/javascript" src="resize.js"></script>
<script type="text/javascript" src="navtree.js"></script>
<script type="text/javascript">
$(document).ready(initResizable);
</script>
<link href="stylesheet.css" rel="stylesheet" type="text/css" />
<script type="text/javascript">
var _gaq = _gaq || [];
_gaq.push(['_setAccount', 'UA-24278774-1']);
_gaq.push(['_trackPageview']);
(function() {
var ga = document.createElement('script'); ga.type = 'text/javascript'; ga.async = true;
ga.src = ('https:' == document.location.protocol ? 'https://ssl' : 'http://www') + '.google-analytics.com/ga.js';
var s = document.getElementsByTagName('script')[0]; s.parentNode.insertBefore(ga, s);
})();
</script>
</head>
<body>
<div id="page">
<div style="position:relative">
<div id="top"><!-- do not remove this div! -->
<div id="titlearea">
<a style="float: right;margin-right:20px;margin-top:20px" href='http://www.pledgie.com/campaigns/15519'><img alt='Click here to support Nimbus development and make a donation at www.pledgie.com !' src='http://www.pledgie.com/campaigns/15519.png?skin_name=chrome' border='0' /></a>
<table cellspacing="0" cellpadding="0">
<tbody>
<tr style="height: 56px;">
<td style="padding-left: 0.5em;">
<div id="projectname">Nimbus
 <span id="projectnumber">0.9.3 - <a href="http://github.com/jverkoey/nimbus">Nimbus is proudly hosted on Github</a></span>
</div>
<div id="projectbrief">An iOS framework whose growth is bounded by O(documentation).</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- Generated by Doxygen 1.7.4-20110629 -->
</div>
<div id="side-nav" class="ui-resizable side-nav-resizable">
<div id="nav-tree">
<div id="nav-tree-contents">
</div>
</div>
<div id="splitbar" style="-moz-user-select:none;"
class="ui-resizable-handle">
</div>
</div>
<script type="text/javascript">
initNavTree('_n_i_network_image_request_8m.html','');
</script>
<div id="doc-content">
<div class="header">
<div class="headertitle">
<div class="title">src/networkimage/src/NINetworkImageRequest.m</div> </div>
</div>
<div class="contents">
<div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">//</span>
<a name="l00002"></a>00002 <span class="comment">// Copyright 2011 Jeff Verkoeyen</span>
<a name="l00003"></a>00003 <span class="comment">//</span>
<a name="l00004"></a>00004 <span class="comment">// Licensed under the Apache License, Version 2.0 (the "License");</span>
<a name="l00005"></a>00005 <span class="comment">// you may not use this file except in compliance with the License.</span>
<a name="l00006"></a>00006 <span class="comment">// You may obtain a copy of the License at</span>
<a name="l00007"></a>00007 <span class="comment">//</span>
<a name="l00008"></a>00008 <span class="comment">// http://www.apache.org/licenses/LICENSE-2.0</span>
<a name="l00009"></a>00009 <span class="comment">//</span>
<a name="l00010"></a>00010 <span class="comment">// Unless required by applicable law or agreed to in writing, software</span>
<a name="l00011"></a>00011 <span class="comment">// distributed under the License is distributed on an "AS IS" BASIS,</span>
<a name="l00012"></a>00012 <span class="comment">// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.</span>
<a name="l00013"></a>00013 <span class="comment">// See the License for the specific language governing permissions and</span>
<a name="l00014"></a>00014 <span class="comment">// limitations under the License.</span>
<a name="l00015"></a>00015 <span class="comment">//</span>
<a name="l00016"></a>00016
<a name="l00017"></a>00017 <span class="preprocessor">#import "NINetworkImageRequest.h"</span>
<a name="l00018"></a>00018
<a name="l00019"></a>00019 <span class="preprocessor">#import "NIOperations+Subclassing.h"</span>
<a name="l00020"></a>00020 <span class="preprocessor">#import "NimbusCore.h"</span>
<a name="l00021"></a>00021
<a name="l00022"></a>00022
<a name="l00026"></a>00026 <span class="keyword">@implementation </span><a class="code" href="interface_n_i_network_image_request.html" title="A threaded network request for an image that chops up and resizes the image before returning to the U...">NINetworkImageRequest</a>
<a name="l00027"></a>00027
<a name="l00028"></a>00028 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_request.html#aab0b4ad03b19c494d0d078bab2196fd2" title="x/y, width/height are in percent coordinates.">imageCropRect</a> = _imageCropRect;
<a name="l00029"></a>00029 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_request.html#acc72993e96c5f3cfda51c4e6dd62980d" title="The size of the image to be displayed on the screen.">imageDisplaySize</a> = _imageDisplaySize;
<a name="l00030"></a>00030 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_request.html#a2dc6ee702bc88b9d90d72a89e60cce95" title="Options for modifying the way images are cropped when scaling.">scaleOptions</a> = _scaleOptions;
<a name="l00031"></a>00031 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_request.html#aeaec04f8843a6531f88cc9c571871062" title="The interpolation quality to use when resizing the image.">interpolationQuality</a> = _interpolationQuality;
<a name="l00032"></a>00032 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_request.html#a301413e084b8dd87d5c3658f2efab2f3" title="Determines how to resize and crop the image.">imageContentMode</a> = _imageContentMode;
<a name="l00033"></a>00033 <span class="keyword">@synthesize</span> <a class="code" href="interface_n_i_network_image_request.html#afb36f412ef053d87f3ff2118b1d5bda4" title="Upon completion of the request, this is the chopped and sized result image that should be used for di...">imageCroppedAndSizedForDisplay</a> = _imageCroppedAndSizedForDisplay;
<a name="l00034"></a>00034
<a name="l00035"></a>00035
<a name="l00037"></a>00037 - (void)dealloc {
<a name="l00038"></a>00038 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(_imageCroppedAndSizedForDisplay);
<a name="l00039"></a>00039
<a name="l00040"></a>00040 [<span class="keyword">super</span> dealloc];
<a name="l00041"></a>00041 }
<a name="l00042"></a>00042
<a name="l00043"></a>00043
<a name="l00045"></a>00045 - (id)initWithURL:(NSURL *)newURL {
<a name="l00046"></a>00046 <span class="keywordflow">if</span> ((<span class="keyword">self</span> = [super initWithURL:newURL])) {
<a name="l00047"></a>00047 <span class="keyword">self</span>.imageCropRect = CGRectZero;
<a name="l00048"></a>00048 <span class="keyword">self</span>.imageDisplaySize = CGSizeZero;
<a name="l00049"></a>00049 <span class="keyword">self</span>.interpolationQuality = kCGInterpolationDefault;
<a name="l00050"></a>00050 <span class="keyword">self</span>.scaleOptions = NINetworkImageViewScaleToFitLeavesExcessAndScaleToFillCropsExcess;
<a name="l00051"></a>00051 <span class="keyword">self</span>.imageContentMode = UIViewContentModeScaleToFill;
<a name="l00052"></a>00052 }
<a name="l00053"></a>00053 <span class="keywordflow">return</span> <span class="keyword">self</span>;
<a name="l00054"></a>00054 }
<a name="l00055"></a>00055
<a name="l00056"></a>00056
<a name="l00058"></a>00058 - (void)<a class="code" href="interface_n_i_operation.html#a386802f5f40d14a17847bcbc9c02e628" title="In the operation's thread, notify the delegate that the operation will finish successfully.">willFinish</a> {
<a name="l00059"></a>00059 <a class="code" href="class_n_s_data.html" title="For hashing raw data.">NSData</a>* responseData = <span class="keyword">self</span>.data;
<a name="l00060"></a>00060 UIImage* image = [[UIImage alloc] initWithData:responseData];
<a name="l00061"></a>00061
<a name="l00062"></a>00062 <span class="keyword">self</span>.data = nil;
<a name="l00063"></a>00063
<a name="l00064"></a>00064 <span class="comment">// Slice it, dice it!</span>
<a name="l00065"></a>00065 [<span class="keyword">self</span> setImageCroppedAndSizedForDisplay:[[<span class="keyword">self</span> class] imageFromSource:image
<a name="l00066"></a>00066 withContentMode:self.imageContentMode
<a name="l00067"></a>00067 cropRect:self.imageCropRect
<a name="l00068"></a>00068 displaySize:self.imageDisplaySize
<a name="l00069"></a>00069 scaleOptions:self.scaleOptions
<a name="l00070"></a>00070 interpolationQuality:self.interpolationQuality]];
<a name="l00071"></a>00071
<a name="l00072"></a>00072 <a class="code" href="group___preprocessor-_macros.html#ga5d2e99251aeb3ddb687e27f72336e5db" title="Release and assign nil to an object.">NI_RELEASE_SAFELY</a>(image);
<a name="l00073"></a>00073
<a name="l00074"></a>00074 [<span class="keyword">super</span> willFinish];
<a name="l00075"></a>00075 }
<a name="l00076"></a>00076
<a name="l00077"></a>00077
<a name="l00079"></a>00079 - (<a class="code" href="class_n_s_string.html" title="For manipulating NSStrings.">NSString</a> *)cacheIdentifier {
<a name="l00080"></a>00080 <span class="keywordflow">return</span> [<span class="keyword">self</span>.url absoluteString];
<a name="l00081"></a>00081 }
<a name="l00082"></a>00082
<a name="l00083"></a>00083
<a name="l00084"></a>00084 <span class="keyword">@end</span>
<a name="l00085"></a>00085
<a name="l00086"></a>00086
<a name="l00090"></a>00090 <span class="keyword">@implementation </span><a class="code" href="interface_n_i_network_image_request.html" title="A threaded network request for an image that chops up and resizes the image before returning to the U...">NINetworkImageRequest</a> (ImageModifications)
<a name="l00091"></a>00091
<a name="l00092"></a>00092
<a name="l00094"></a>00094
<a name="l00098"></a>00098 + (CGRect)sourceRectWithImageSize:(CGSize)imageSize
<a name="l00099"></a>00099 displaySize:(CGSize)displaySize
<a name="l00100"></a>00100 contentMode:(UIViewContentMode)contentMode {
<a name="l00101"></a>00101 <span class="keywordflow">if</span> (UIViewContentModeScaleToFill == contentMode) {
<a name="l00102"></a>00102 <span class="comment">// Scale to fill draws the original image by squashing it to fit the destination's</span>
<a name="l00103"></a>00103 <span class="comment">// aspect ratio, so the source and destination rects aren't modified.</span>
<a name="l00104"></a>00104 <span class="keywordflow">return</span> CGRectMake(0, 0, imageSize.width, imageSize.height);
<a name="l00105"></a>00105
<a name="l00106"></a>00106 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeScaleAspectFit == contentMode) {
<a name="l00107"></a>00107 <span class="comment">// Aspect fit grabs the entire original image and squashes it down to a frame that fits</span>
<a name="l00108"></a>00108 <span class="comment">// the destination and leaves the unfilled space transparent.</span>
<a name="l00109"></a>00109 <span class="keywordflow">return</span> CGRectMake(0, 0, imageSize.width, imageSize.height);
<a name="l00110"></a>00110
<a name="l00111"></a>00111 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeScaleAspectFill == contentMode) {
<a name="l00112"></a>00112 <span class="comment">// Aspect fill requires that we take the destination rectangle and "fit" it within the</span>
<a name="l00113"></a>00113 <span class="comment">// source rectangle; this gives us the area of the source image we'll crop out to draw into</span>
<a name="l00114"></a>00114 <span class="comment">// the destination image.</span>
<a name="l00115"></a>00115 CGFloat scale = MIN(imageSize.width / displaySize.width,
<a name="l00116"></a>00116 imageSize.height / displaySize.height);
<a name="l00117"></a>00117 CGSize scaledDisplaySize = CGSizeMake(displaySize.width * scale, displaySize.height * scale);
<a name="l00118"></a>00118 <span class="keywordflow">return</span> CGRectMake(floorf((imageSize.width - scaledDisplaySize.width) / 2),
<a name="l00119"></a>00119 floorf((imageSize.height - scaledDisplaySize.height) / 2),
<a name="l00120"></a>00120 scaledDisplaySize.width,
<a name="l00121"></a>00121 scaledDisplaySize.height);
<a name="l00122"></a>00122
<a name="l00123"></a>00123 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeCenter == contentMode) {
<a name="l00124"></a>00124 <span class="comment">// We need to cut out a hole the size of the display in the center of the source image.</span>
<a name="l00125"></a>00125 <span class="keywordflow">return</span> CGRectMake(floorf((imageSize.width - displaySize.width) / 2),
<a name="l00126"></a>00126 floorf((imageSize.width - displaySize.width) / 2),
<a name="l00127"></a>00127 displaySize.width, displaySize.height);
<a name="l00128"></a>00128
<a name="l00129"></a>00129 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeTop == contentMode) {
<a name="l00130"></a>00130 <span class="comment">// We need to cut out a hole the size of the display in the top center of the source image.</span>
<a name="l00131"></a>00131 <span class="keywordflow">return</span> CGRectMake(floorf((imageSize.width - displaySize.width) / 2),
<a name="l00132"></a>00132 0,
<a name="l00133"></a>00133 displaySize.width, displaySize.height);
<a name="l00134"></a>00134
<a name="l00135"></a>00135 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeBottom == contentMode) {
<a name="l00136"></a>00136 <span class="comment">// We need to cut out a hole the size of the display in the bottom center of the source image.</span>
<a name="l00137"></a>00137 <span class="keywordflow">return</span> CGRectMake(floorf((imageSize.width - displaySize.width) / 2),
<a name="l00138"></a>00138 imageSize.height - displaySize.height,
<a name="l00139"></a>00139 displaySize.width, displaySize.height);
<a name="l00140"></a>00140
<a name="l00141"></a>00141 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeLeft == contentMode) {
<a name="l00142"></a>00142 <span class="comment">// We need to cut out a hole the size of the display in the left center of the source image.</span>
<a name="l00143"></a>00143 <span class="keywordflow">return</span> CGRectMake(0,
<a name="l00144"></a>00144 floorf((imageSize.width - displaySize.width) / 2),
<a name="l00145"></a>00145 displaySize.width, displaySize.height);
<a name="l00146"></a>00146
<a name="l00147"></a>00147 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeRight == contentMode) {
<a name="l00148"></a>00148 <span class="comment">// We need to cut out a hole the size of the display in the right center of the source image.</span>
<a name="l00149"></a>00149 <span class="keywordflow">return</span> CGRectMake(imageSize.width - displaySize.width,
<a name="l00150"></a>00150 floorf((imageSize.width - displaySize.width) / 2),
<a name="l00151"></a>00151 displaySize.width, displaySize.height);
<a name="l00152"></a>00152
<a name="l00153"></a>00153 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeTopLeft == contentMode) {
<a name="l00154"></a>00154 <span class="comment">// We need to cut out a hole the size of the display in the top left of the source image.</span>
<a name="l00155"></a>00155 <span class="keywordflow">return</span> CGRectMake(0,
<a name="l00156"></a>00156 0,
<a name="l00157"></a>00157 displaySize.width, displaySize.height);
<a name="l00158"></a>00158
<a name="l00159"></a>00159 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeTopRight == contentMode) {
<a name="l00160"></a>00160 <span class="comment">// We need to cut out a hole the size of the display in the top right of the source image.</span>
<a name="l00161"></a>00161 <span class="keywordflow">return</span> CGRectMake(imageSize.width - displaySize.width,
<a name="l00162"></a>00162 0,
<a name="l00163"></a>00163 displaySize.width, displaySize.height);
<a name="l00164"></a>00164
<a name="l00165"></a>00165 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeBottomLeft == contentMode) {
<a name="l00166"></a>00166 <span class="comment">// We need to cut out a hole the size of the display in the bottom left of the source image.</span>
<a name="l00167"></a>00167 <span class="keywordflow">return</span> CGRectMake(0,
<a name="l00168"></a>00168 imageSize.height - displaySize.height,
<a name="l00169"></a>00169 displaySize.width, displaySize.height);
<a name="l00170"></a>00170
<a name="l00171"></a>00171 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeBottomRight == contentMode) {
<a name="l00172"></a>00172 <span class="comment">// We need to cut out a hole the size of the display in the bottom right of the source image.</span>
<a name="l00173"></a>00173 <span class="keywordflow">return</span> CGRectMake(imageSize.width - displaySize.width,
<a name="l00174"></a>00174 imageSize.height - displaySize.height,
<a name="l00175"></a>00175 displaySize.width, displaySize.height);
<a name="l00176"></a>00176
<a name="l00177"></a>00177 } <span class="keywordflow">else</span> {
<a name="l00178"></a>00178 <span class="comment">// Not implemented</span>
<a name="l00179"></a>00179 <a class="code" href="group___debugging-_tools.html#gab5d8a773517976d97335706474ae1317" title="Only writes to the log if NIMaxLogLevel >= NILOGLEVEL_ERROR.">NIDERROR</a>(<span class="stringliteral">@"This content mode has not been implemented in the threaded network image view: %d"</span>,
<a name="l00180"></a>00180 contentMode);
<a name="l00181"></a>00181 <span class="keywordflow">return</span> CGRectMake(0, 0, imageSize.width, imageSize.height);
<a name="l00182"></a>00182 }
<a name="l00183"></a>00183 }
<a name="l00184"></a>00184
<a name="l00185"></a>00185
<a name="l00187"></a>00187
<a name="l00191"></a>00191 + (CGRect)destinationRectWithImageSize:(CGSize)imageSize
<a name="l00192"></a>00192 displaySize:(CGSize)displaySize
<a name="l00193"></a>00193 contentMode:(UIViewContentMode)contentMode {
<a name="l00194"></a>00194 <span class="keywordflow">if</span> (UIViewContentModeScaleAspectFit == contentMode) {
<a name="l00195"></a>00195 <span class="comment">// Fit the image right in the center of the source frame and maintain the aspect ratio.</span>
<a name="l00196"></a>00196 CGFloat scale = MIN(displaySize.width / imageSize.width,
<a name="l00197"></a>00197 displaySize.height / imageSize.height);
<a name="l00198"></a>00198 CGSize scaledImageSize = CGSizeMake(imageSize.width * scale, imageSize.height * scale);
<a name="l00199"></a>00199 <span class="keywordflow">return</span> CGRectMake(floorf((displaySize.width - scaledImageSize.width) / 2),
<a name="l00200"></a>00200 floorf((displaySize.height - scaledImageSize.height) / 2),
<a name="l00201"></a>00201 scaledImageSize.width,
<a name="l00202"></a>00202 scaledImageSize.height);
<a name="l00203"></a>00203
<a name="l00204"></a>00204 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (UIViewContentModeScaleToFill == contentMode
<a name="l00205"></a>00205 || UIViewContentModeScaleAspectFill == contentMode
<a name="l00206"></a>00206 || UIViewContentModeCenter == contentMode
<a name="l00207"></a>00207 || UIViewContentModeTop == contentMode
<a name="l00208"></a>00208 || UIViewContentModeBottom == contentMode
<a name="l00209"></a>00209 || UIViewContentModeLeft == contentMode
<a name="l00210"></a>00210 || UIViewContentModeRight == contentMode
<a name="l00211"></a>00211 || UIViewContentModeTopLeft == contentMode
<a name="l00212"></a>00212 || UIViewContentModeTopRight == contentMode
<a name="l00213"></a>00213 || UIViewContentModeBottomLeft == contentMode
<a name="l00214"></a>00214 || UIViewContentModeBottomRight == contentMode) {
<a name="l00215"></a>00215 <span class="comment">// We're filling the entire destination, so the destination rect is the display rect.</span>
<a name="l00216"></a>00216 <span class="keywordflow">return</span> CGRectMake(0, 0, displaySize.width, displaySize.height);
<a name="l00217"></a>00217
<a name="l00218"></a>00218 } <span class="keywordflow">else</span> {
<a name="l00219"></a>00219 <span class="comment">// Not implemented</span>
<a name="l00220"></a>00220 <a class="code" href="group___debugging-_tools.html#gab5d8a773517976d97335706474ae1317" title="Only writes to the log if NIMaxLogLevel >= NILOGLEVEL_ERROR.">NIDERROR</a>(<span class="stringliteral">@"This content mode has not been implemented in the threaded network image view: %d"</span>,
<a name="l00221"></a>00221 contentMode);
<a name="l00222"></a>00222 <span class="keywordflow">return</span> CGRectMake(0, 0, displaySize.width, displaySize.height);
<a name="l00223"></a>00223 }
<a name="l00224"></a>00224 }
<a name="l00225"></a>00225
<a name="l00226"></a>00226
<a name="l00228"></a>00228 + (UIImage *)imageFromSource: (UIImage *)src
<a name="l00229"></a>00229 withContentMode: (UIViewContentMode)contentMode
<a name="l00230"></a>00230 cropRect: (CGRect)cropRect
<a name="l00231"></a>00231 displaySize: (CGSize)displaySize
<a name="l00232"></a>00232 scaleOptions: (<a class="code" href="group___network-_image-_user-_interface.html#ga44d338b3b1eae1d2a3bb8fd985acf856" title="Flags for modifying the way cropping is handled when scaling images to fit or fill.">NINetworkImageViewScaleOptions</a>)scaleOptions
<a name="l00233"></a>00233 interpolationQuality: (CGInterpolationQuality)interpolationQuality {
<a name="l00234"></a>00234
<a name="l00235"></a>00235 UIImage* resultImage = src;
<a name="l00236"></a>00236
<a name="l00237"></a>00237 CGImageRef srcImageRef = src.CGImage;
<a name="l00238"></a>00238 CGImageRef croppedImageRef = nil;
<a name="l00239"></a>00239 CGImageRef trimmedImageRef = nil;
<a name="l00240"></a>00240
<a name="l00241"></a>00241 CGRect srcRect = CGRectMake(0, 0, src.size.width, src.size.height);
<a name="l00242"></a>00242
<a name="l00243"></a>00243 <span class="comment">// Cropping</span>
<a name="l00244"></a>00244 <span class="keywordflow">if</span> (!CGRectIsEmpty(cropRect)
<a name="l00245"></a>00245 && !CGRectEqualToRect(cropRect, CGRectMake(0, 0, 1, 1))) {
<a name="l00246"></a>00246 CGRect innerRect = CGRectMake(floorf(src.size.width * cropRect.origin.x),
<a name="l00247"></a>00247 floorf(src.size.height * cropRect.origin.y),
<a name="l00248"></a>00248 floorf(src.size.width * cropRect.size.width),
<a name="l00249"></a>00249 floorf(src.size.height * cropRect.size.height));
<a name="l00250"></a>00250
<a name="l00251"></a>00251 <span class="comment">// Create a new image containing only the cropped inner rect.</span>
<a name="l00252"></a>00252 srcImageRef = CGImageCreateWithImageInRect(srcImageRef, innerRect);
<a name="l00253"></a>00253 croppedImageRef = srcImageRef;
<a name="l00254"></a>00254
<a name="l00255"></a>00255 <span class="comment">// This new image will likely have a different width and height, so we have to update</span>
<a name="l00256"></a>00256 <span class="comment">// the source rect as a result.</span>
<a name="l00257"></a>00257 srcRect = CGRectMake(0, 0,
<a name="l00258"></a>00258 CGRectGetWidth(innerRect),
<a name="l00259"></a>00259 CGRectGetHeight(innerRect));
<a name="l00260"></a>00260 }
<a name="l00261"></a>00261
<a name="l00262"></a>00262 <span class="comment">// Display</span>
<a name="l00263"></a>00263 <span class="keywordflow">if</span> (0 < displaySize.width
<a name="l00264"></a>00264 && 0 < displaySize.height) {
<a name="l00265"></a>00265
<a name="l00266"></a>00266 <span class="keywordflow">if</span> ((NINetworkImageViewScaleToFillLeavesExcess
<a name="l00267"></a>00267 == (NINetworkImageViewScaleToFillLeavesExcess & scaleOptions))
<a name="l00268"></a>00268 && UIViewContentModeScaleAspectFill == contentMode) {
<a name="l00269"></a>00269 <span class="comment">// Make the display size match the aspect ratio of the source image by growing the</span>
<a name="l00270"></a>00270 <span class="comment">// display size.</span>
<a name="l00271"></a>00271 CGFloat imageAspectRatio = srcRect.size.width / srcRect.size.height;
<a name="l00272"></a>00272 CGFloat displayAspectRatio = displaySize.width / displaySize.height;
<a name="l00273"></a>00273
<a name="l00274"></a>00274 <span class="keywordflow">if</span> (imageAspectRatio > displayAspectRatio) {
<a name="l00275"></a>00275 <span class="comment">// The image is wider than the display, so let's increase the width.</span>
<a name="l00276"></a>00276 displaySize.width = displaySize.height * imageAspectRatio;
<a name="l00277"></a>00277
<a name="l00278"></a>00278 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (imageAspectRatio < displayAspectRatio) {
<a name="l00279"></a>00279 <span class="comment">// The image is taller than the display, so let's increase the height.</span>
<a name="l00280"></a>00280 displaySize.height = displaySize.width * (srcRect.size.height / srcRect.size.width);
<a name="l00281"></a>00281 }
<a name="l00282"></a>00282
<a name="l00283"></a>00283 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> ((NINetworkImageViewScaleToFitCropsExcess
<a name="l00284"></a>00284 == (NINetworkImageViewScaleToFitCropsExcess & scaleOptions))
<a name="l00285"></a>00285 && UIViewContentModeScaleAspectFit == contentMode) {
<a name="l00286"></a>00286 <span class="comment">// Make the display size match the aspect ratio of the source image by shrinking the</span>
<a name="l00287"></a>00287 <span class="comment">// display size.</span>
<a name="l00288"></a>00288 CGFloat imageAspectRatio = srcRect.size.width / srcRect.size.height;
<a name="l00289"></a>00289 CGFloat displayAspectRatio = displaySize.width / displaySize.height;
<a name="l00290"></a>00290
<a name="l00291"></a>00291 <span class="keywordflow">if</span> (imageAspectRatio > displayAspectRatio) {
<a name="l00292"></a>00292 <span class="comment">// The image is wider than the display, so let's decrease the height.</span>
<a name="l00293"></a>00293 displaySize.height = displaySize.width * (srcRect.size.height / srcRect.size.width);
<a name="l00294"></a>00294
<a name="l00295"></a>00295 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (imageAspectRatio < displayAspectRatio) {
<a name="l00296"></a>00296 <span class="comment">// The image is taller than the display, so let's decrease the width.</span>
<a name="l00297"></a>00297 displaySize.width = displaySize.height * imageAspectRatio;
<a name="l00298"></a>00298 }
<a name="l00299"></a>00299 }
<a name="l00300"></a>00300
<a name="l00301"></a>00301 CGRect srcCropRect = [<span class="keyword">self</span> sourceRectWithImageSize: srcRect.size
<a name="l00302"></a>00302 displaySize: displaySize
<a name="l00303"></a>00303 contentMode: contentMode];
<a name="l00304"></a>00304 srcCropRect = CGRectMake(floorf(srcCropRect.origin.x),
<a name="l00305"></a>00305 floorf(srcCropRect.origin.y),
<a name="l00306"></a>00306 roundf(srcCropRect.size.width),
<a name="l00307"></a>00307 roundf(srcCropRect.size.height));
<a name="l00308"></a>00308
<a name="l00309"></a>00309 <span class="comment">// Do we need to crop the source?</span>
<a name="l00310"></a>00310 <span class="keywordflow">if</span> (!CGRectEqualToRect(srcCropRect, srcRect)) {
<a name="l00311"></a>00311 srcImageRef = CGImageCreateWithImageInRect(srcImageRef, srcCropRect);
<a name="l00312"></a>00312 trimmedImageRef = srcImageRef;
<a name="l00313"></a>00313
<a name="l00314"></a>00314 srcRect = CGRectMake(0, 0,
<a name="l00315"></a>00315 CGRectGetWidth(srcCropRect),
<a name="l00316"></a>00316 CGRectGetHeight(srcCropRect));
<a name="l00317"></a>00317
<a name="l00318"></a>00318 <span class="comment">// Release the cropped image source to reduce this thread's memory consumption.</span>
<a name="l00319"></a>00319 <span class="keywordflow">if</span> (nil != croppedImageRef) {
<a name="l00320"></a>00320 CGImageRelease(croppedImageRef);
<a name="l00321"></a>00321 croppedImageRef = nil;
<a name="l00322"></a>00322 }
<a name="l00323"></a>00323 }
<a name="l00324"></a>00324
<a name="l00325"></a>00325 <span class="comment">// Calcuate the destination frame.</span>
<a name="l00326"></a>00326 CGRect dstBlitRect = [<span class="keyword">self</span> destinationRectWithImageSize: srcRect.size
<a name="l00327"></a>00327 displaySize: displaySize
<a name="l00328"></a>00328 contentMode: contentMode];
<a name="l00329"></a>00329 dstBlitRect = CGRectMake(floorf(dstBlitRect.origin.x),
<a name="l00330"></a>00330 floorf(dstBlitRect.origin.y),
<a name="l00331"></a>00331 roundf(dstBlitRect.size.width),
<a name="l00332"></a>00332 roundf(dstBlitRect.size.height));
<a name="l00333"></a>00333
<a name="l00334"></a>00334 <span class="comment">// Round any remainder on the display size dimensions.</span>
<a name="l00335"></a>00335 displaySize = CGSizeMake(roundf(displaySize.width), roundf(displaySize.height));
<a name="l00336"></a>00336
<a name="l00337"></a>00337 <span class="comment">// See table "Supported Pixel Formats" in the following guide for support iOS bitmap formats:</span>
<a name="l00338"></a>00338 <span class="comment">// http://developer.apple.com/library/mac/#documentation/GraphicsImaging/Conceptual/drawingwithquartz2d/dq_context/dq_context.html</span>
<a name="l00339"></a>00339 CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
<a name="l00340"></a>00340 CGBitmapInfo bmi = kCGImageAlphaPremultipliedLast;
<a name="l00341"></a>00341
<a name="l00342"></a>00342 <span class="comment">// For screen sizes with higher resolutions, we create a larger image with a scale value</span>
<a name="l00343"></a>00343 <span class="comment">// so that it appears crisper on the screen.</span>
<a name="l00344"></a>00344 CGFloat screenScale = <a class="code" href="group___s_d_k-_availability.html#ga8ffc9070109f21db5092d5e2b65b7578" title="Fetch the screen's scale in an SDK-agnostic way.">NIScreenScale</a>();
<a name="l00345"></a>00345
<a name="l00346"></a>00346 <span class="comment">// Create our final composite image.</span>
<a name="l00347"></a>00347 CGContextRef dstBmp = CGBitmapContextCreate(NULL,
<a name="l00348"></a>00348 displaySize.width * screenScale,
<a name="l00349"></a>00349 displaySize.height * screenScale,
<a name="l00350"></a>00350 8,
<a name="l00351"></a>00351 0,
<a name="l00352"></a>00352 colorSpace,
<a name="l00353"></a>00353 bmi);
<a name="l00354"></a>00354
<a name="l00355"></a>00355 <span class="comment">// If this fails then we're likely creating an invalid bitmap and shit's about to go down.</span>
<a name="l00356"></a>00356 <span class="comment">// In production this will fail somewhat gracefully, in that we'll end up just using the</span>
<a name="l00357"></a>00357 <span class="comment">// source image instead of the cropped and resized image.</span>
<a name="l00358"></a>00358 NIDASSERT(nil != dstBmp);
<a name="l00359"></a>00359
<a name="l00360"></a>00360 <span class="keywordflow">if</span> (nil != dstBmp) {
<a name="l00361"></a>00361 CGRect dstRect = CGRectMake(0, 0,
<a name="l00362"></a>00362 displaySize.width * screenScale,
<a name="l00363"></a>00363 displaySize.height * screenScale);
<a name="l00364"></a>00364
<a name="l00365"></a>00365 <span class="comment">// Render the source image into the destination image.</span>
<a name="l00366"></a>00366 CGContextClearRect(dstBmp, dstRect);
<a name="l00367"></a>00367 CGContextSetInterpolationQuality(dstBmp, interpolationQuality);
<a name="l00368"></a>00368
<a name="l00369"></a>00369 CGRect scaledBlitRect = CGRectMake(dstBlitRect.origin.x * screenScale,
<a name="l00370"></a>00370 dstBlitRect.origin.y * screenScale,
<a name="l00371"></a>00371 dstBlitRect.size.width * screenScale,
<a name="l00372"></a>00372 dstBlitRect.size.height * screenScale);
<a name="l00373"></a>00373 CGContextDrawImage(dstBmp, scaledBlitRect, srcImageRef);
<a name="l00374"></a>00374
<a name="l00375"></a>00375 CGImageRef resultImageRef = CGBitmapContextCreateImage(dstBmp);
<a name="l00376"></a>00376
<a name="l00377"></a>00377 <span class="keywordflow">if</span> (nil != resultImageRef) {
<a name="l00378"></a>00378 <span class="keywordflow">if</span> ([[UIImage <span class="keyword">class</span>] respondsToSelector:<span class="keyword">@selector</span>(imageWithCGImage:scale:orientation:)]) {
<a name="l00379"></a>00379 resultImage = [UIImage imageWithCGImage: resultImageRef
<a name="l00380"></a>00380 scale: screenScale
<a name="l00381"></a>00381 orientation: UIImageOrientationUp];
<a name="l00382"></a>00382
<a name="l00383"></a>00383 } <span class="keywordflow">else</span> {
<a name="l00384"></a>00384 resultImage = [UIImage imageWithCGImage: resultImageRef];
<a name="l00385"></a>00385 }
<a name="l00386"></a>00386 CGImageRelease(resultImageRef);
<a name="l00387"></a>00387 }
<a name="l00388"></a>00388
<a name="l00389"></a>00389 CGContextRelease(dstBmp);
<a name="l00390"></a>00390 }
<a name="l00391"></a>00391
<a name="l00392"></a>00392 CGColorSpaceRelease(colorSpace);
<a name="l00393"></a>00393
<a name="l00394"></a>00394 } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (nil != croppedImageRef) {
<a name="l00395"></a>00395 resultImage = [UIImage imageWithCGImage:srcImageRef];
<a name="l00396"></a>00396 }
<a name="l00397"></a>00397
<a name="l00398"></a>00398 <span class="comment">// Memory cleanup.</span>
<a name="l00399"></a>00399 <span class="keywordflow">if</span> (nil != trimmedImageRef) {
<a name="l00400"></a>00400 CGImageRelease(trimmedImageRef);
<a name="l00401"></a>00401 }
<a name="l00402"></a>00402 <span class="keywordflow">if</span> (nil != croppedImageRef) {
<a name="l00403"></a>00403 CGImageRelease(croppedImageRef);
<a name="l00404"></a>00404 }
<a name="l00405"></a>00405
<a name="l00406"></a>00406 <span class="keywordflow">return</span> resultImage;
<a name="l00407"></a>00407 }
<a name="l00408"></a>00408
<a name="l00409"></a>00409
<a name="l00410"></a>00410 <span class="keyword">@end</span>
</pre></div><div id="disqus_thread"></div></div>
</div>
<div id="nav-path" class="navpath">
<ul>
<li class="navelem"><b>NINetworkImageRequest.m</b> </li>
</div><!-- .fixedwidth -->
<script type="text/javascript">
/* * * CONFIGURATION VARIABLES: EDIT BEFORE PASTING INTO YOUR WEBPAGE * * */
var disqus_shortname = 'nimbusdocumentation'; // required: replace example with your forum shortname
// The following are highly recommended additional parameters. Remove the slashes in front to use.
// var disqus_identifier = 'unique_dynamic_id_1234';
// var disqus_url = 'http://example.com/permalink-to-page.html';
/* * * DON'T EDIT BELOW THIS LINE * * */
(function() {
var dsq = document.createElement('script'); dsq.type = 'text/javascript'; dsq.async = true;
dsq.src = 'http://' + disqus_shortname + '.disqus.com/embed.js';
(document.getElementsByTagName('head')[0] || document.getElementsByTagName('body')[0]).appendChild(dsq);
})();
</script>
<span class="footer">Generated for Nimbus by
<a href="http://www.doxygen.org/index.html">
<img class="footer" src="doxygen.png" alt="doxygen"/></a> 1.7.4-20110629 </span>
</ul>
</div>
</div> <!-- page -->
</body>
</html>