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A Codea addon for saving images to the photo album, share photos to facebook and detect faces in an image. Just add [self.viewController registerAddon:[ImageTools sharedInstance]]; to AppDelegate.mm
//
// ImageTools.h
// FaceDetection
//
// Created by Tobias Teleman on fredag 12 april 2013
// Copyright (c) Tobias Teleman. All rights reserved.
//
#import <Foundation/Foundation.h>
#import "CodeaAddon.h"
#define DEFINE_SHARED_INSTANCE_USING_BLOCK(block) \
+ (instancetype)sharedInstance\
{\
static dispatch_once_t pred = 0; \
__strong static id _sharedObject = nil; \
dispatch_once(&pred, ^{ \
_sharedObject = block(); \
}); \
return _sharedObject; \
}\
#define DEFINE_SHARED_INSTANCE \
+ (instancetype)sharedInstance;\
#define DEFINE_SHARED_INSTANCE_IMPL \
DEFINE_SHARED_INSTANCE_USING_BLOCK(^{\
return [[self alloc] init];\
})\
@interface ImageTools: NSObject<CodeaAddon>
DEFINE_SHARED_INSTANCE
@end
//
// ImageTools.mm
// FaceDetection
//
// Created by Tobias Teleman on fredag 12 april 2013
// Copyright (c) Tobias Teleman. All rights reserved.
//
#import "ImageTools.h"
#import "Social/Social.h"
#ifdef __cplusplus
extern "C" {
#endif
#import "lua.h"
#import "lauxlib.h"
struct image_type_t;
struct image_type_t *checkimage(lua_State *L, int i);
typedef enum PersistenceImageAlpha
{
PersistenceImageAlphaPremultiply,
PersistenceImageAlphaNoPremultiply,
} PersistenceImageAlpha;
UIImage* createUIImageFromImage(struct image_type_t* image, PersistenceImageAlpha alphaOption);
#ifdef __cplusplus
}
#endif
static int WriteToPhotoAlbumFunction(struct lua_State *state);
static int ShareToFacebook(struct lua_State *state);
static int DetectFaceFeatures(struct lua_State *state);
@interface ImageTools()
@property (nonatomic, weak) CodeaViewController *codeaViewController;
@property (nonatomic, strong) CIDetector* detector;
@end
@implementation ImageTools
DEFINE_SHARED_INSTANCE_IMPL
- (void) codea:(CodeaViewController*)controller didCreateLuaState:(struct lua_State*)L
{
NSLog(@"Register ImageTools");
self.codeaViewController = controller;
lua_register(L, "saveToPhotoAlbum", WriteToPhotoAlbumFunction);
lua_register(L, "shareToFacebook", ShareToFacebook);
lua_register(L, "detectFaceFeatures", DetectFaceFeatures);
NSDictionary *detectorOptions = [[NSDictionary alloc] initWithObjectsAndKeys:CIDetectorAccuracyLow, CIDetectorAccuracy, nil];
self.detector = [CIDetector detectorOfType:CIDetectorTypeFace
context:nil options:detectorOptions];
}
@end
static int WriteToPhotoAlbumFunction(struct lua_State *state) {
struct image_type_t* imageType = checkimage(state, 1);
UIImage* image = createUIImageFromImage(imageType, PersistenceImageAlphaNoPremultiply);
UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);
return 0;
}
static int ShareToFacebook(struct lua_State *state) {
SLComposeViewController *fbController=[SLComposeViewController composeViewControllerForServiceType:SLServiceTypeFacebook];
struct image_type_t* imageType = checkimage(state, 1);
UIImage* image = createUIImageFromImage(imageType, PersistenceImageAlphaNoPremultiply);
if([SLComposeViewController isAvailableForServiceType:SLServiceTypeFacebook])
{
SLComposeViewControllerCompletionHandler __block completionHandler=^(SLComposeViewControllerResult result){
[fbController dismissViewControllerAnimated:YES completion:nil];
switch(result){
case SLComposeViewControllerResultCancelled:
default:
{
NSLog(@"Cancelled");
}
break;
case SLComposeViewControllerResultDone:
{
NSLog(@"Posted");
}
break;
}};
[fbController addImage:image];
[fbController setInitialText:@"I made this with Recursive!"];
[fbController setCompletionHandler:completionHandler];
[[ImageTools sharedInstance].codeaViewController
presentViewController:fbController animated:YES completion:nil];
}
return 0;
}
static int DetectFaceFeatures(struct lua_State *state) {
struct image_type_t* imageType = checkimage(state, 1);
UIImage* image = createUIImageFromImage(imageType, PersistenceImageAlphaNoPremultiply);
CIImage* ciimage = [CIImage imageWithCGImage:image.CGImage];
NSArray* features = [[ImageTools sharedInstance].detector featuresInImage:ciimage];
for(CIFaceFeature* faceFeature in features) {
lua_newtable(state);
lua_pushstring(state, "x");
lua_pushinteger(state, faceFeature.bounds.origin.x);
lua_settable(state, -3);
lua_pushstring(state, "y");
lua_pushinteger(state, faceFeature.bounds.origin.y);
lua_settable(state, -3);
lua_pushstring(state, "width");
lua_pushinteger(state, faceFeature.bounds.size.width);
lua_settable(state, -3);
lua_pushstring(state, "height");
lua_pushinteger(state, faceFeature.bounds.size.height);
lua_settable(state, -3);
if(faceFeature.hasLeftEyePosition) {
lua_pushstring(state, "leftEye");
lua_newtable(state);
lua_pushstring(state, "x");
lua_pushinteger(state, faceFeature.leftEyePosition.x);
lua_settable(state, -3);
lua_pushstring(state, "y");
lua_pushinteger(state, faceFeature.leftEyePosition.y);
lua_settable(state, -3);
lua_settable(state, -3);
}
if(faceFeature.hasRightEyePosition) {
lua_pushstring(state, "rightEye");
lua_newtable(state);
lua_pushstring(state, "x");
lua_pushinteger(state, faceFeature.rightEyePosition.x);
lua_settable(state, -3);
lua_pushstring(state, "y");
lua_pushinteger(state, faceFeature.rightEyePosition.y);
lua_settable(state, -3);
lua_settable(state, -3);
}
if(faceFeature.hasMouthPosition) {
lua_pushstring(state, "mouth");
lua_newtable(state);
lua_pushstring(state, "x");
lua_pushinteger(state, faceFeature.mouthPosition.x);
lua_settable(state, -3);
lua_pushstring(state, "y");
lua_pushinteger(state, faceFeature.mouthPosition.y);
lua_settable(state, -3);
lua_settable(state, -3);
}
return 1;
}
return 0;
}
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