CCGraphics.m 18 KB

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  1. //
  2. // CCGraphics.m
  3. // Nextcloud iOS
  4. //
  5. // Created by Marino Faggiana on 04/02/16.
  6. // Copyright (c) 2017 Marino Faggiana. All rights reserved.
  7. //
  8. // Author Marino Faggiana <m.faggiana@twsweb.it>
  9. //
  10. // This program is free software: you can redistribute it and/or modify
  11. // it under the terms of the GNU General Public License as published by
  12. // the Free Software Foundation, either version 3 of the License, or
  13. // (at your option) any later version.
  14. //
  15. // This program is distributed in the hope that it will be useful,
  16. // but WITHOUT ANY WARRANTY; without even the implied warranty of
  17. // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  18. // GNU General Public License for more details.
  19. //
  20. // You should have received a copy of the GNU General Public License
  21. // along with this program. If not, see <http://www.gnu.org/licenses/>.
  22. //
  23. #import "CCGraphics.h"
  24. #import "CCUtility.h"
  25. #import "NSString+TruncateToWidth.h"
  26. #import "NCBridgeSwift.h"
  27. @implementation CCGraphics
  28. + (UIImage *)thumbnailImageForVideo:(NSURL *)videoURL atTime:(NSTimeInterval)time
  29. {
  30. AVURLAsset *asset = [[AVURLAsset alloc] initWithURL:videoURL options:nil];
  31. NSParameterAssert(asset);
  32. AVAssetImageGenerator *assetIG =
  33. [[AVAssetImageGenerator alloc] initWithAsset:asset];
  34. assetIG.appliesPreferredTrackTransform = YES;
  35. assetIG.apertureMode = AVAssetImageGeneratorApertureModeEncodedPixels;
  36. CGImageRef thumbnailImageRef = NULL;
  37. CFTimeInterval thumbnailImageTime = time;
  38. NSError *igError = nil;
  39. thumbnailImageRef =
  40. [assetIG copyCGImageAtTime:CMTimeMake(thumbnailImageTime, 60) actualTime:NULL error:&igError];
  41. if (!thumbnailImageRef) NSLog(@"[LOG] thumbnailImageGenerationError %@", igError );
  42. UIImage *thumbnailImage = thumbnailImageRef ? [[UIImage alloc] initWithCGImage:thumbnailImageRef] : nil;
  43. return thumbnailImage;
  44. }
  45. // mix two image
  46. + (UIImage *)overlayImage:(UIImage *)backgroundImage watermarkImage:(UIImage *)watermarkImage where:(NSString *)where
  47. {
  48. // example watermarkImage = [UIImage imageNamed:@"lock"];
  49. UIGraphicsBeginImageContext(backgroundImage.size);
  50. [backgroundImage drawInRect:CGRectMake(0, 0, backgroundImage.size.width, backgroundImage.size.height)];
  51. if ([where isEqualToString:@"right"]) [watermarkImage drawInRect:CGRectMake(backgroundImage.size.width - watermarkImage.size.width, backgroundImage.size.height - watermarkImage.size.height, watermarkImage.size.width, watermarkImage.size.height)];
  52. if ([where isEqualToString:@"left"]) [watermarkImage drawInRect:CGRectMake(0, backgroundImage.size.height - watermarkImage.size.height, backgroundImage.size.width - watermarkImage.size.width, backgroundImage.size.height - watermarkImage.size.height)];
  53. UIImage *result = UIGraphicsGetImageFromCurrentImageContext();
  54. UIGraphicsEndImageContext();
  55. return result;
  56. }
  57. + (UIImage *)generateImageFromVideo:(NSString *)videoPath
  58. {
  59. NSURL *url = [NSURL fileURLWithPath:videoPath];
  60. NSError *error = NULL;
  61. AVURLAsset* asset = [AVURLAsset URLAssetWithURL:url options:nil];
  62. AVAssetImageGenerator* imageGenerator = [AVAssetImageGenerator assetImageGeneratorWithAsset:asset];
  63. imageGenerator.appliesPreferredTrackTransform = YES;
  64. // CMTime time = CMTimeMake(1, 65);
  65. CGImageRef cgImage = [imageGenerator copyCGImageAtTime:CMTimeMake(0, 1) actualTime:nil error:&error];
  66. if(error) return nil;
  67. UIImage* image = [UIImage imageWithCGImage:cgImage];
  68. CGImageRelease(cgImage);
  69. return image;
  70. }
  71. + (UIImage *)scaleImage:(UIImage *)image toSize:(CGSize)targetSize
  72. {
  73. //If scaleFactor is not touched, no scaling will occur
  74. CGFloat scaleFactor = 1.0;
  75. //Deciding which factor to use to scale the image (factor = targetSize / imageSize)
  76. if (image.size.width > targetSize.width || image.size.height > targetSize.height)
  77. if (!((scaleFactor = (targetSize.width / image.size.width)) > (targetSize.height / image.size.height))) //scale to fit width, or
  78. scaleFactor = targetSize.height / image.size.height; // scale to fit heigth.
  79. UIGraphicsBeginImageContext(targetSize);
  80. //Creating the rect where the scaled image is drawn in
  81. CGRect rect = CGRectMake((targetSize.width - image.size.width * scaleFactor) / 2,
  82. (targetSize.height - image.size.height * scaleFactor) / 2,
  83. image.size.width * scaleFactor, image.size.height * scaleFactor);
  84. //Draw the image into the rect
  85. [image drawInRect:rect];
  86. //Saving the image, ending image context
  87. UIImage *scaledImage = UIGraphicsGetImageFromCurrentImageContext();
  88. UIGraphicsEndImageContext();
  89. return scaledImage;
  90. }
  91. + (UIImage *)scaleImage:(UIImage *)image toSize:(CGSize)targetSize isAspectRation:(BOOL)aspect
  92. {
  93. CGFloat originRatio = image.size.width / image.size.height;
  94. CGFloat newRatio = targetSize.width / targetSize.height;
  95. CGSize sz;
  96. CGFloat scale = 1.0;
  97. if (!aspect) {
  98. sz = targetSize;
  99. }else {
  100. if (originRatio < newRatio) {
  101. sz.height = targetSize.height;
  102. sz.width = targetSize.height * originRatio;
  103. }else {
  104. sz.width = targetSize.width;
  105. sz.height = targetSize.width / originRatio;
  106. }
  107. }
  108. sz.width /= scale;
  109. sz.height /= scale;
  110. UIGraphicsBeginImageContextWithOptions(sz, NO, scale);
  111. [image drawInRect:CGRectMake(0, 0, sz.width, sz.height)];
  112. UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
  113. UIGraphicsEndImageContext();
  114. return newImage;
  115. }
  116. + (UIImage *)createNewImageFrom:(NSString *)fileName fileID:(NSString *)fileID extension:(NSString *)extension filterGrayScale:(BOOL)filterGrayScale typeFile:(NSString *)typeFile writeImage:(BOOL)writeImage
  117. {
  118. UIImage *originalImage;
  119. UIImage *scaleImage;
  120. NSString *fileNamePath = [CCUtility getDirectoryProviderStorageFileID:fileID fileNameView:fileName];
  121. if (![CCUtility fileProviderStorageExists:fileID fileNameView:fileName]) return nil;
  122. // only viedo / image
  123. if (![typeFile isEqualToString: k_metadataTypeFile_image] && ![typeFile isEqualToString: k_metadataTypeFile_video]) return nil;
  124. if ([typeFile isEqualToString: k_metadataTypeFile_image]) {
  125. originalImage = [UIImage imageWithContentsOfFile:fileNamePath];
  126. }
  127. if ([typeFile isEqualToString: k_metadataTypeFile_video]) {
  128. // create symbolik link for read video file in temp
  129. [[NSFileManager defaultManager] removeItemAtPath:[NSTemporaryDirectory() stringByAppendingString:@"tempvideo.mp4"] error:nil];
  130. [[NSFileManager defaultManager] linkItemAtPath:fileNamePath toPath:[NSTemporaryDirectory() stringByAppendingString:@"tempvideo.mp4"] error:nil];
  131. originalImage = [self generateImageFromVideo:[NSTemporaryDirectory() stringByAppendingString:@"tempvideo.mp4"]];
  132. }
  133. CGFloat width = [[NCUtility sharedInstance] getScreenWidthForPreview];
  134. CGFloat height = [[NCUtility sharedInstance] getScreenHeightForPreview];
  135. scaleImage = [self scaleImage:originalImage toSize:CGSizeMake(width, height)];
  136. scaleImage = [UIImage imageWithData:UIImageJPEGRepresentation(scaleImage, 0.5f)];
  137. // it is request write photo ?
  138. if (writeImage && scaleImage) {
  139. if (filterGrayScale) {
  140. // if it is preview for Upload then trasform it in gray scale
  141. scaleImage = [self grayscale:scaleImage];
  142. [UIImagePNGRepresentation(scaleImage) writeToFile:[CCUtility getDirectoryProviderStorageIconFileID:fileID fileNameView:fileName] atomically: YES];
  143. } else {
  144. [UIImagePNGRepresentation(scaleImage) writeToFile:[CCUtility getDirectoryProviderStorageIconFileID:fileID fileNameView:fileName] atomically: YES];
  145. }
  146. }
  147. return scaleImage;
  148. }
  149. + (UIColor *)colorFromHexString:(NSString *)hexString
  150. {
  151. unsigned rgbValue = 0;
  152. NSScanner *scanner = [NSScanner scannerWithString:hexString];
  153. [scanner setScanLocation:1]; // bypass '#' character
  154. [scanner scanHexInt:&rgbValue];
  155. return [UIColor colorWithRed:((rgbValue & 0xFF0000) >> 16)/255.0 green:((rgbValue & 0xFF00) >> 8)/255.0 blue:(rgbValue & 0xFF)/255.0 alpha:1.0];
  156. }
  157. + (UIImage *)changeThemingColorImage:(UIImage *)image multiplier:(NSInteger)multiplier color:(UIColor *)color
  158. {
  159. CGRect rect = CGRectMake(0, 0, image.size.width*multiplier, image.size.height*multiplier);
  160. UIGraphicsBeginImageContext(rect.size);
  161. CGContextRef context = UIGraphicsGetCurrentContext();
  162. CGContextClipToMask(context, rect, image.CGImage);
  163. CGContextSetFillColorWithColor(context, [color CGColor]);
  164. CGContextFillRect(context, rect);
  165. UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
  166. UIGraphicsEndImageContext();
  167. return [UIImage imageWithCGImage:img.CGImage scale:2.0 orientation: UIImageOrientationDownMirrored];
  168. }
  169. + (UIImage *)changeThemingColorImage:(UIImage *)image width:(CGFloat)width height:(CGFloat)height scale:(CGFloat)scale color:(UIColor *)color
  170. {
  171. CGRect rect = CGRectMake(0, 0, width, height);
  172. UIGraphicsBeginImageContext(rect.size);
  173. CGContextRef context = UIGraphicsGetCurrentContext();
  174. CGContextClipToMask(context, rect, image.CGImage);
  175. if (color)
  176. CGContextSetFillColorWithColor(context, [color CGColor]);
  177. CGContextFillRect(context, rect);
  178. UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
  179. UIGraphicsEndImageContext();
  180. return [UIImage imageWithCGImage:img.CGImage scale:scale orientation: UIImageOrientationDownMirrored];
  181. }
  182. + (UIImage*)drawText:(NSString*)text inImage:(UIImage*)image colorText:(UIColor *)colorText sizeOfFont:(CGFloat)sizeOfFont
  183. {
  184. NSDictionary* attributes = @{NSFontAttributeName: [UIFont systemFontOfSize:sizeOfFont], NSForegroundColorAttributeName:colorText};
  185. NSAttributedString* attributedString = [[NSAttributedString alloc] initWithString:text attributes:attributes];
  186. int x = image.size.width/2 - attributedString.size.width/2;
  187. int y = image.size.height/2 - attributedString.size.height/2;
  188. UIGraphicsBeginImageContext(image.size);
  189. [image drawInRect:CGRectMake(0,0,image.size.width,image.size.height)];
  190. CGRect rect = CGRectMake(x, y, image.size.width, image.size.height);
  191. [[UIColor whiteColor] set];
  192. [text drawInRect:CGRectIntegral(rect) withAttributes:attributes];
  193. UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
  194. newImage = [UIImage imageWithCGImage:newImage.CGImage scale:2 orientation:UIImageOrientationUp];
  195. UIGraphicsEndImageContext();
  196. return newImage;
  197. }
  198. // ------------------------------------------------------------------------------------------------------
  199. // MARK: Blur Image
  200. // ------------------------------------------------------------------------------------------------------
  201. + (UIImage *)blurryImage:(UIImage *)image withBlurLevel:(CGFloat)blur toSize:(CGSize)toSize
  202. {
  203. CIImage *inputImage = [CIImage imageWithCGImage:image.CGImage];
  204. CIFilter *filter = [CIFilter filterWithName:@"CIGaussianBlur" keysAndValues:kCIInputImageKey, inputImage, @"inputRadius", @(blur), nil];
  205. CIImage *outputImage = filter.outputImage;
  206. CIContext *context = [CIContext contextWithOptions:nil];
  207. CGImageRef outImage = [context createCGImage:outputImage fromRect:[outputImage extent]];
  208. UIImage *blurImage = [UIImage imageWithCGImage:outImage];
  209. return [CCGraphics scaleImage:blurImage toSize:toSize isAspectRation:YES];
  210. }
  211. // ------------------------------------------------------------------------------------------------------
  212. // MARK: Is Light Color
  213. // ------------------------------------------------------------------------------------------------------
  214. /*
  215. Color visibility can be determined according to the following algorithm:
  216. (This is a suggested algorithm that is still open to change.)
  217. Two colors provide good color visibility if the brightness difference and the color difference between the two colors are greater than a set range.
  218. Color brightness is determined by the following formula:
  219. ((Red value X 299) + (Green value X 587) + (Blue value X 114)) / 1000
  220. Note: This algorithm is taken from a formula for converting RGB values to YIQ values. This brightness value gives a perceived brightness for a color.
  221. Color difference is determined by the following formula:
  222. (maximum (Red value 1, Red value 2) - minimum (Red value 1, Red value 2)) + (maximum (Green value 1, Green value 2) - minimum (Green value 1, Green value 2)) + (maximum (Blue value 1, Blue value 2) - minimum (Blue value 1, Blue value 2))
  223. */
  224. + (BOOL)isLight:(UIColor *)color
  225. {
  226. const CGFloat *componentColors = CGColorGetComponents(color.CGColor);
  227. CGFloat colorBrightness = ((componentColors[0] * 299) + (componentColors[1] * 587) + (componentColors[2] * 114)) / 1000;
  228. if (colorBrightness < 0.8) { // STD 0.5
  229. return false;
  230. } else {
  231. return true;
  232. }
  233. }
  234. + (UIImage *)grayscale:(UIImage *)sourceImage
  235. {
  236. /* const UInt8 luminance = (red * 0.2126) + (green * 0.7152) + (blue * 0.0722); // Good luminance value */
  237. /// Create a gray bitmap context
  238. const size_t width = (size_t)sourceImage.size.width;
  239. const size_t height = (size_t)sourceImage.size.height;
  240. const int kNyxNumberOfComponentsPerGreyPixel = 3;
  241. CGRect imageRect = CGRectMake(0, 0, sourceImage.size.width, sourceImage.size.height);
  242. CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceGray();
  243. CGContextRef bmContext = CGBitmapContextCreate(NULL, width, height, 8/*Bits per component*/, width * kNyxNumberOfComponentsPerGreyPixel, colorSpace, kCGImageAlphaNone);
  244. CGColorSpaceRelease(colorSpace);
  245. if (!bmContext)
  246. return nil;
  247. /// Image quality
  248. CGContextSetShouldAntialias(bmContext, false);
  249. CGContextSetInterpolationQuality(bmContext, kCGInterpolationHigh);
  250. /// Draw the image in the bitmap context
  251. CGContextDrawImage(bmContext, imageRect, sourceImage.CGImage);
  252. /// Create an image object from the context
  253. CGImageRef grayscaledImageRef = CGBitmapContextCreateImage(bmContext);
  254. UIImage *grayscaled = [UIImage imageWithCGImage:grayscaledImageRef scale:sourceImage.scale orientation:sourceImage.imageOrientation];
  255. /// Cleanup
  256. CGImageRelease(grayscaledImageRef);
  257. CGContextRelease(bmContext);
  258. return grayscaled;
  259. }
  260. + (UIImage *)generateSinglePixelImageWithColor:(UIColor *)color
  261. {
  262. CGSize imageSize = CGSizeMake(1.0f, 1.0f);
  263. UIGraphicsBeginImageContextWithOptions(imageSize, NO, 0.0f);
  264. CGContextRef theContext = UIGraphicsGetCurrentContext();
  265. CGContextSetFillColorWithColor(theContext, color.CGColor);
  266. CGContextFillRect(theContext, CGRectMake(0.0f, 0.0f, imageSize.width, imageSize.height));
  267. CGImageRef theCGImage = CGBitmapContextCreateImage(theContext);
  268. UIImage *theImage;
  269. if ([[UIImage class] respondsToSelector:@selector(imageWithCGImage:scale:orientation:)]) {
  270. theImage = [UIImage imageWithCGImage:theCGImage scale:[UIScreen mainScreen].scale orientation:UIImageOrientationUp];
  271. } else {
  272. theImage = [UIImage imageWithCGImage:theCGImage];
  273. }
  274. CGImageRelease(theCGImage);
  275. return theImage;
  276. }
  277. + (void)addImageToTitle:(NSString *)title colorTitle:(UIColor *)colorTitle imageTitle:(UIImage *)imageTitle imageRight:(BOOL)imageRight navigationItem:(UINavigationItem *)navigationItem
  278. {
  279. UIView *navView = [UIView new];
  280. UILabel *label = [UILabel new];
  281. if (imageRight)
  282. title = [NSString stringWithFormat:@" %@", title];
  283. label.text = title;
  284. [label sizeToFit];
  285. label.center = navView.center;
  286. label.textColor = colorTitle;
  287. label.textAlignment = NSTextAlignmentCenter;
  288. CGFloat correct = 6;
  289. UIImageView *image = [UIImageView new];
  290. image.image = imageTitle;
  291. CGFloat imageAspect = image.image.size.width/image.image.size.height;
  292. if (imageRight) {
  293. image.frame = CGRectMake(label.intrinsicContentSize.width+label.frame.origin.x+correct, label.frame.origin.y+correct/2, label.frame.size.height*imageAspect-correct, label.frame.size.height-correct);
  294. } else {
  295. image.frame = CGRectMake(label.frame.origin.x-label.frame.size.height*imageAspect, label.frame.origin.y+correct/2, label.frame.size.height*imageAspect-correct, label.frame.size.height-correct);
  296. }
  297. image.contentMode = UIViewContentModeScaleAspectFit;
  298. [navView addSubview:label];
  299. [navView addSubview:image];
  300. navigationItem.titleView = navView;
  301. [navView sizeToFit];
  302. }
  303. + (void)settingThemingColor:(NSString *)themingColor themingColorElement:(NSString *)themingColorElement themingColorText:(NSString *)themingColorText
  304. {
  305. UIColor *newColor, *newColorElement, *newColorText;
  306. // COLOR
  307. if (themingColor.length == 7) {
  308. newColor = [CCGraphics colorFromHexString:themingColor];
  309. } else {
  310. newColor = [NCBrandColor sharedInstance].customer;
  311. }
  312. // COLOR TEXT
  313. if (themingColorText.length == 7) {
  314. newColorText = [CCGraphics colorFromHexString:themingColorText];
  315. } else {
  316. newColorText = [NCBrandColor sharedInstance].customerText;
  317. }
  318. // COLOR ELEMENT
  319. if (themingColorElement.length == 7) {
  320. newColorElement = [CCGraphics colorFromHexString:themingColorElement];
  321. } else {
  322. if ([themingColorText isEqualToString:@"#000000"])
  323. newColorElement = [UIColor blackColor];
  324. else
  325. newColorElement = newColor;
  326. }
  327. [NCBrandColor sharedInstance].brand = newColor;
  328. [NCBrandColor sharedInstance].brandElement = newColorElement;
  329. [NCBrandColor sharedInstance].brandText = newColorText;
  330. }
  331. @end
  332. // ------------------------------------------------------------------------------------------------------
  333. // MARK: Avatar
  334. // ------------------------------------------------------------------------------------------------------
  335. @implementation CCAvatar
  336. - (id)initWithImage:(UIImage *)image borderColor:(UIColor*)borderColor borderWidth:(float)borderWidth
  337. {
  338. self = [super initWithImage:image];
  339. float cornerRadius = self.frame.size.height/2.0f;
  340. CALayer *layer = [self layer];
  341. [layer setMasksToBounds:YES];
  342. [layer setCornerRadius: cornerRadius];
  343. [layer setBorderWidth: borderWidth];
  344. [layer setBorderColor:[borderColor CGColor]];
  345. return self;
  346. }
  347. @end