activegs-ios/Common.iphone/asyncimageview.mm
2016-03-31 17:21:48 -04:00

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/*
ActiveGS, Copyright 2004-2016 Olivier Goguel, https://github.com/ogoguel/ActiveGS
Based on Kegs, Copyright 2004 Kent Dickey, https://kegs.sourceforge.net
This code is covered by the GNU GPL licence
*/
#include "activegsAppDelegate.h"
#import "AsyncImageView.h"
#include "../common/CEmulatorCtrl.h"
static asyncImageQueue* queue = nil;
static UIActivityIndicatorView* asyncloader=nil;
@implementation asyncImageQueue
@synthesize theQueue = _theQueue;
@synthesize theConnection = _theConnection;
+(void) initialize{
// singleton
queue = [[asyncImageQueue alloc] init];
queue.theQueue = [[NSMutableArray alloc] init ];
queue.theConnection = nil;
asyncloader = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];
}
+(asyncImageQueue*)sharedQueue
{
return queue;
}
-(void)prioritizeItem:(UIImageView*)_mytarget {
int nb = [self.theQueue count];
for(int i=0;i<nb;i++)
{
AsyncImageView* o = [self.theQueue objectAtIndex:i];
if (o.target==_mytarget)
{
// le remet au début de la pile = A FAIRE DANS CETTE ORDRE
[self.theQueue removeObject:o];
[self.theQueue addObject:o];
debug_printf("image put on top of the cache %s\n",[o.url UTF8String]);
return;
}
}
}
- (void)nextDownload {
debug_printf("next download");
if (self.theConnection)
{
debug_printf("*wait\n");
return ;
}
AsyncImageView* obj = [self.theQueue lastObject];
if (obj)
{
[obj processDownload];
}
else
{
debug_printf("*nothing to unqueue*\n");
}
}
-(void)removeObject:(id)_obj
{
debug_printf("remove object");
[self.theQueue removeObject:_obj];
// [self.theConnection release];
self.theConnection = nil;
[self nextDownload];
}
@end
@implementation AsyncImageView
@synthesize data = _data;
@synthesize target = _target;
@synthesize url = _url;
- (void)processDownload {
// printf("processDownload (%s)\n",[url UTF8String]);
[asyncloader removeFromSuperview];
CGRect r = self.target.frame;
CGRect f = asyncloader.frame;
f.origin.x = (r.size.width-f.size.width)/2;
f.origin.y = (r.size.height-f.size.height)/2;
asyncloader.frame = f;
[ self.target addSubview:asyncloader];
[asyncloader startAnimating];
NSURL* urlnoescape = [[NSURL alloc] initWithString:[ self.url stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]] ;
NSURLRequest* request = [NSURLRequest requestWithURL:urlnoescape cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:60.0] ;
queue.theConnection = [[NSURLConnection alloc] initWithRequest:request delegate:self] ;
if (!queue.theConnection)
printf("NSURLConnection failed\n");
}
- (void)initImage:(const char*)_thumb target:(UIImageView*)_mytarget width:(int)_width height:(int)_height
{
thumb = _thumb;
width = _width;
height = _height;
self.target = _mytarget;
}
//- (void)loadImage:(const char*)_thumb target:(UIImageView*)_target width:(int)_width height:(int)_height
- (void)loadImage:(id)_sender
{
if (thumb.IsEmpty()) return ;
NSString* str = [NSString stringWithUTF8String:thumb.c_str()];
if ( self.data!=nil)
{
self.data =nil;
}
if (!str) return ;
// regarde si l'image générée est dans le cache
MyString fnoext =getfilenoext(getfile(thumb.c_str()));
MyString cache;
cache.Format("%s_%d_%d.%s",fnoext.c_str(),width,height,getext(thumb.c_str()));
CDownload dl("***ERROR***");
dl.getPersistentDirectoryFile(cache.c_str(),IPHONETHUMB,cachedURL);
NSString* strc = [NSString stringWithUTF8String:cachedURL.c_str()] ;
UIImage* imageView = [UIImage imageWithContentsOfFile:strc] ;
if (imageView)
{
debug_printf("target image loaded from cache %s\n",getfile(cachedURL.c_str()));
self.target.image = imageView;
return ;
}
// non : regarde si l'image original a déjà été téléchargé
if ([str length] > 7 && [[str substringToIndex:7] compare:@"http://"])
{
NSString *str2;
if (thumb.at(0) != '/')
{
// ressource image
str2 = [[NSBundle mainBundle] pathForResource:str ofType:nil];
}
else
{
// absolute path
str2 = str ; //[NSString stringWithUTF8String:str];
}
imageView = [UIImage imageWithContentsOfFile:str2]; // to mimic init
if (!imageView)
{
printf("init image failed (%s)\n",[str2 UTF8String]);
return ;
}
debug_printf("image loaded from resource %s\n",getfile([str2 UTF8String]));
}
else
{
self.url = str;
// regarde si l'image est dans le cache
dl.getPersistentDirectoryFile([self.url UTF8String],IPHONETHUMB,cache);
NSString* strcache = [NSString stringWithUTF8String:cache.c_str()];
imageView = [UIImage imageWithContentsOfFile:strcache];
if (imageView)
{
debug_printf("image loaded from cache %s\n",getfile(cache.c_str()));
}
else
{
asyncImageQueue* q = [asyncImageQueue sharedQueue];
[q.theQueue addObject:self];
[q nextDownload];
return ;
}
}
[self setImageForCell:imageView];
}
//the URL connection calls this repeatedly as data arrives
- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)incrementalData {
if (self.data==nil) { self.data = [[NSMutableData alloc] initWithCapacity:2048]; }
[self.data appendData:incrementalData];
}
//the URL connection calls this once all the data has downloaded
- (void)connectionDidFinishLoading:(NSURLConnection*)connection {
[asyncloader removeFromSuperview];
[asyncloader stopAnimating];
UIImage* imageView = [[UIImage alloc] initWithData:self.data] ;
if (!imageView)
{
printf("init image failed (%s)\n",[self.url UTF8String]);
}
else
{
// process l'image
NSData * png = self.data;
MyString cache;
CDownload dl("***ERROR***");
dl.getPersistentDirectoryFile([self.url UTF8String],IPHONETHUMB,cache);
FILE* f = fopen(cache.c_str(),"wb");
if (f)
{
fwrite(png.bytes,1,png.length,f);
fclose(f);
}
else
{
printf("cannot update cache %s\n",cache.c_str());
}
debug_printf("image downloaded (%s)\n",getfile([self.url UTF8String]));
[self performSelectorOnMainThread:@selector(setImageForCell:) withObject:imageView waitUntilDone:NO];
}
self.data=nil;
[[asyncImageQueue sharedQueue] removeObject:self];
}
- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
printf("didFailWithError (%s)\n",[self.url UTF8String]);
[asyncloader removeFromSuperview];
[asyncloader stopAnimating];
self.data=nil;
[[asyncImageQueue sharedQueue] removeObject:self];
}
+(UIImage*)processImage:(UIImage*)_img width:(int)_width height:(int)_height
{
#define IMAGESCALE 1
#define SHADOW 2
#define LEFTMARGIN 6
#define BOTTOMMARGIN 0
#define TOPMARGIN 0
const float s = [pManager dpiRatio];
CGRect r = CGRectMake(0,0,_width*s,_height*s);
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(nil, (int)r.size.width,(int)r.size.height, 8, (int)r.size.width*4,colorSpace,kCGImageAlphaPremultipliedLast/*kCGImageAlphaNone*/);
float ovalWidth=14*s,ovalHeight=14*s;
CGContextSaveGState(context);
CGContextTranslateCTM (context, CGRectGetMinX(r), CGRectGetMinY(r));
CGContextScaleCTM (context, ovalWidth, ovalHeight);
float fw = CGRectGetWidth (r) / ovalWidth;
float fh = CGRectGetHeight (r) / ovalHeight;
CGContextMoveToPoint(context, fw, fh/2);
CGContextAddArcToPoint(context, fw, fh, fw/2, fh, 1);
CGContextAddArcToPoint(context, 0, fh, 0, fh/2, 1);
CGContextAddArcToPoint(context, 0, 0, fw/2, 0, 1);
CGContextAddArcToPoint(context, fw, 0, fw, fh/2, 1);
CGContextClosePath(context);
CGContextRestoreGState(context);
CGContextClip(context);
//CGContextSetInterpolationQuality(context,kCGInterpolationHigh);
CGContextDrawImage(context,r,[_img CGImage]);
CGImageRef imageRef2 = CGBitmapContextCreateImage(context);
// Crée une nouvelle image pour le shadow
CGRect r2 = CGRectMake(0,0,r.size.width+(LEFTMARGIN+SHADOW)*s,r.size.height+(SHADOW*2+BOTTOMMARGIN+TOPMARGIN)*s);
CGContextRef context2 = CGBitmapContextCreate(nil,(int)r2.size.width,(int)r2.size.height, 8, (int)r2.size.width*4,colorSpace,kCGImageAlphaPremultipliedLast/*kCGImageAlphaNone*/);
CGContextSaveGState(context2);
CGContextSetShadowWithColor(context2, CGSizeMake(SHADOW*s, -SHADOW*s), 4, [[UIColor grayColor] CGColor]);
CGRect rdest = r;
rdest.origin.x = LEFTMARGIN*s;
rdest.origin.y = (BOTTOMMARGIN+SHADOW)*s;
//CGContextSetInterpolationQuality(context2,kCGInterpolationHigh);
CGContextDrawImage(context2,rdest,imageRef2);
CGContextRestoreGState(context2);
CGImageRef imageRef = CGBitmapContextCreateImage(context2);
UIImage* newImage = [UIImage imageWithCGImage:imageRef];
CGColorSpaceRelease(colorSpace);
CGContextRelease(context);
CFRelease(imageRef);
CGContextRelease(context2);
CFRelease(imageRef2);
return newImage;
}
-(void)setImageForCell:(UIImage*) _img
{
debug_printf("setImageForCell");
UIImage* img2 = [AsyncImageView processImage:_img width:width height:height];
[self.target setNeedsDisplay];
[UIView beginAnimations:@"ToggleSiblings" context:nil];
[UIView setAnimationTransition:UIViewAnimationTransitionFlipFromLeft /*UIViewAnimationTransitionCurlUp*/ forView:self.target cache:YES];
[UIView setAnimationDuration:1.0];
self.target.image = img2;
[UIView commitAnimations];
// sauve dans le cache
NSData *png = UIImagePNGRepresentation(img2);
FILE* f = fopen(cachedURL.c_str(),"wb");
if (f)
{
fwrite(png.bytes,1,png.length,f);
fclose(f);
}
else
{
printf("cannot update cache %s\n",cachedURL.c_str());
}
}
@end