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react-native-image-resizer
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Handle images from RCT Image store 

On iOS, when cropping an image with ImageEditor, it returns an uri starting with rct-image-store which could not be read by this module
This commit is contained in:
Almouro 2016-03-13 16:49:17 +01:00
parent 590ae1d7fe
commit 125365ec6b
15 changed files with 315 additions and 505 deletions
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7
RNImageResizer.xcodeproj/project.xcworkspace/contents.xcworkspacedata generated
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180
RNImageResizer/ImageHelpers.m
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@ -1,180 +0,0 @@
/*
File: ImageHelpers.m
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
Inc. ("Apple") in consideration of your agreement to the following
terms, and your use, installation, modification or redistribution of
this Apple software constitutes acceptance of these terms. If you do
not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Inc. may
be used to endorse or promote products derived from the Apple Software
without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or
implied, are granted by Apple herein, including but not limited to any
patent rights that may be infringed by your derivative works or by other
works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2009 Apple Inc. All Rights Reserved.
*/
#include "ImageHelpers.h"
const CGBitmapInfo kDefaultCGBitmapInfo = (kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host);
const CGBitmapInfo kDefaultCGBitmapInfoNoAlpha = (kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host);
CGColorSpaceRef GetDeviceRGBColorSpace() {
static CGColorSpaceRef deviceRGBSpace = NULL;
if( deviceRGBSpace == NULL )
deviceRGBSpace = CGColorSpaceCreateDeviceRGB();
return deviceRGBSpace;
}
float GetScaleForProportionalResize( CGSize theSize, CGSize intoSize, bool onlyScaleDown, bool maximize )
{
float sx = theSize.width;
float sy = theSize.height;
float dx = intoSize.width;
float dy = intoSize.height;
float scale = 1;
if( sx != 0 && sy != 0 )
{
dx = dx / sx;
dy = dy / sy;
// if maximize is true, take LARGER of the scales, else smaller
if( maximize ) scale = (dx > dy) ? dx : dy;
else scale = (dx < dy) ? dx : dy;
if( scale > 1 && onlyScaleDown ) // reset scale
scale = 1;
}
else
{
scale = 0;
}
return scale;
}
CGContextRef CreateCGBitmapContextForWidthAndHeight( unsigned int width, unsigned int height,
CGColorSpaceRef optionalColorSpace, CGBitmapInfo optionalInfo )
{
CGColorSpaceRef colorSpace = (optionalColorSpace == NULL) ? GetDeviceRGBColorSpace() : optionalColorSpace;
CGBitmapInfo alphaInfo = ( (int32_t)optionalInfo < 0 ) ? kDefaultCGBitmapInfo : optionalInfo;
return CGBitmapContextCreate( NULL, width, height, 8, 0, colorSpace, alphaInfo );
}
CGImageRef CreateCGImageFromUIImageScaled( UIImage* image, float scaleFactor )
{
CGImageRef newImage = NULL;
CGContextRef bmContext = NULL;
BOOL mustTransform = YES;
CGAffineTransform transform = CGAffineTransformIdentity;
UIImageOrientation orientation = image.imageOrientation;
CGImageRef srcCGImage = CGImageRetain( image.CGImage );
size_t width = CGImageGetWidth(srcCGImage) * scaleFactor;
size_t height = CGImageGetHeight(srcCGImage) * scaleFactor;
// These Orientations are rotated 0 or 180 degrees, so they retain the width/height of the image
if( (orientation == UIImageOrientationUp) || (orientation == UIImageOrientationDown) || (orientation == UIImageOrientationUpMirrored) || (orientation == UIImageOrientationDownMirrored) )
{
bmContext = CreateCGBitmapContextForWidthAndHeight( width, height, NULL, kDefaultCGBitmapInfo );
}
else // The other Orientations are rotated ±90 degrees, so they swap width & height.
{
bmContext = CreateCGBitmapContextForWidthAndHeight( height, width, NULL, kDefaultCGBitmapInfo );
}
//CGContextSetInterpolationQuality( bmContext, kCGInterpolationLow );
CGContextSetBlendMode( bmContext, kCGBlendModeCopy ); // we just want to copy the data
switch(orientation)
{
case UIImageOrientationDown: // 0th row is at the bottom, and 0th column is on the right - Rotate 180 degrees
transform = CGAffineTransformMake(-1.0, 0.0, 0.0, -1.0, width, height);
break;
case UIImageOrientationLeft: // 0th row is on the left, and 0th column is the bottom - Rotate -90 degrees
transform = CGAffineTransformMake(0.0, 1.0, -1.0, 0.0, height, 0.0);
break;
case UIImageOrientationRight: // 0th row is on the right, and 0th column is the top - Rotate 90 degrees
transform = CGAffineTransformMake(0.0, -1.0, 1.0, 0.0, 0.0, width);
break;
case UIImageOrientationUpMirrored: // 0th row is at the top, and 0th column is on the right - Flip Horizontal
transform = CGAffineTransformMake(-1.0, 0.0, 0.0, 1.0, width, 0.0);
break;
case UIImageOrientationDownMirrored: // 0th row is at the bottom, and 0th column is on the left - Flip Vertical
transform = CGAffineTransformMake(1.0, 0.0, 0, -1.0, 0.0, height);
break;
case UIImageOrientationLeftMirrored: // 0th row is on the left, and 0th column is the top - Rotate -90 degrees and Flip Vertical
transform = CGAffineTransformMake(0.0, -1.0, -1.0, 0.0, height, width);
break;
case UIImageOrientationRightMirrored: // 0th row is on the right, and 0th column is the bottom - Rotate 90 degrees and Flip Vertical
transform = CGAffineTransformMake(0.0, 1.0, 1.0, 0.0, 0.0, 0.0);
break;
default:
mustTransform = NO;
break;
}
if( mustTransform ) CGContextConcatCTM( bmContext, transform );
CGContextDrawImage( bmContext, CGRectMake(0.0, 0.0, width, height), srcCGImage );
CGImageRelease( srcCGImage );
newImage = CGBitmapContextCreateImage( bmContext );
CFRelease( bmContext );
return newImage;
}
@implementation UIImage (scale)
-(UIImage*) scaleToSize:(CGSize)toSize
{
UIImage *scaledImg = nil;
float scale = GetScaleForProportionalResize( self.size, toSize, false, false );
CGImageRef cgImage = CreateCGImageFromUIImageScaled( self, scale );
if( cgImage )
{
scaledImg = [UIImage imageWithCGImage:cgImage]; // autoreleased
CGImageRelease( cgImage );
}
return scaledImg;
}
@end

92
RNImageResizer/ImageResizerModule.m
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@ -1,92 +0,0 @@
//
// ImageResize.m
// ChoozItApp
//
// Created by Florian Rival on 19/11/15.
//
#import <AssetsLibrary/AssetsLibrary.h>
#import "RCTBridgeModule.h"
#include "ImageHelpers.h"
@interface ImageResizerModule : NSObject <RCTBridgeModule>
@end
@implementation ImageResizerModule
RCT_EXPORT_MODULE();
void saveImage(NSString * fullPath, UIImage * image, float quality)
{
NSData* data = UIImageJPEGRepresentation(image, quality / 100.0);
NSFileManager* fileManager = [NSFileManager defaultManager];
[fileManager createFileAtPath:fullPath contents:data attributes:nil];
}
NSString * generateCacheFilePath(NSString * ext)
{
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString* cacheDirectory = [paths firstObject];
NSString* name = [[NSUUID UUID] UUIDString];
NSString* fullName = [NSString stringWithFormat:@"%@.%@", name, ext];
NSString* fullPath = [cacheDirectory stringByAppendingPathComponent:fullName];
return fullPath;
}
RCT_EXPORT_METHOD(createResizedImage:(NSString *)path width:(float)width height:(float)height quality:(float)quality callback:(RCTResponseSenderBlock)callback)
{
CGSize newSize = CGSizeMake(width, height);
NSString* fullPath = generateCacheFilePath(@".jpg");
NSURL* url = [NSURL URLWithString:path];
if ([[url scheme] isEqualToString:@"assets-library"]) {
ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];
// Ask for the "Asset" for the URL. An asset is a representation of an image in the Photo application.
[library assetForURL:url resultBlock:^(ALAsset *asset) {
ALAssetRepresentation* representation = [asset defaultRepresentation];
// Retrieve the image orientation from the ALAsset
UIImageOrientation orientation = UIImageOrientationUp;
NSNumber* orientationValue = [asset valueForProperty:@"ALAssetPropertyOrientation"];
if (orientationValue != nil) {
orientation = [orientationValue intValue];
}
CGFloat scale = 1;
UIImage* image = [UIImage imageWithCGImage:[representation fullResolutionImage]
scale:scale orientation:orientation];
//Do the resizing
UIImage * scaledImage = [image scaleToSize:newSize];
if (scaledImage == nil) {
callback(@[@"Can't resize the image.", @""]);
return;
}
saveImage(fullPath, scaledImage, quality);
callback(@[[NSNull null], fullPath]);
} failureBlock:^(NSError *error) {
callback(@[@"Can't retrieve the file from assets library.", @""]);
}];
} else {
//Get the image from its path
UIImage* image = [[UIImage alloc] initWithContentsOfFile:path];
if (image == nil) {
callback(@[@"Can't retrieve the file from the path.", @""]);
return;
}
//Do the resizing
UIImage * scaledImage = [image scaleToSize:newSize];
if (scaledImage == nil) {
callback(@[@"Can't resize the image.", @""]);
return;
}
saveImage(fullPath, scaledImage, quality);
callback(@[[NSNull null], fullPath]);
}
}
@end

13
RNImageResizer/RNImageResizer.h
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@ -1,13 +0,0 @@
//
// RNImageResizer.h
// RNImageResizer
//
// Created by Florian Rival on 02/12/15.
// Copyright © 2015 BAM. All rights reserved.
//
#import <Foundation/Foundation.h>
@interface RNImageResizer : NSObject
@end

13
RNImageResizer/RNImageResizer.m
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@ -1,13 +0,0 @@
//
// RNImageResizer.m
// RNImageResizer
//
// Created by Florian Rival on 02/12/15.
// Copyright © 2015 BAM. All rights reserved.
//
#import "RNImageResizer.h"
@implementation RNImageResizer
@end

2
index.ios.js
View File

@ -9,7 +9,7 @@ export default {
}
return new Promise((resolve, reject) => {
NativeModules.ImageResizerModule.createResizedImage(path, width, height, quality, (err, resizedPath) => {
NativeModules.ImageResizer.createResizedImage(path, width, height, quality, (err, resizedPath) => {
if (err) {
return reject(err);
}

120
RNImageResizer.xcodeproj/project.pbxproj → ios/RCTImageResizer.xcodeproj/project.pbxproj
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@ -7,36 +7,34 @@
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runOnlyForDeploymentPostprocessing = 0;
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@ -46,100 +44,98 @@
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5D72D2E41C16249000E22EC1 /* Sources */ = {
isa = PBXSourcesBuildPhase;
buildActionMask = 2147483647;
files = (
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17C2CB8B1C0F9C0F00A087DF /* ImageHelpers.m in Sources */,
17C2CB8C1C0F9C0F00A087DF /* ImageResizerModule.m in Sources */,
5D72D2EE1C16249000E22EC1 /* RCTImageResizer.m in Sources */,
B62D1C4C1C95C21300AD70F2 /* ImageHelpers.m in Sources */,
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runOnlyForDeploymentPostprocessing = 0;
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17C2CB6D1C0F979D00A087DF /* Debug */ = {
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isa = XCBuildConfiguration;
buildSettings = {
ALWAYS_SEARCH_USER_PATHS = NO;
@ -182,7 +178,7 @@
};
name = Debug;
};
17C2CB6E1C0F979D00A087DF /* Release */ = {
5D72D2F01C16249000E22EC1 /* Release */ = {
isa = XCBuildConfiguration;
buildSettings = {
ALWAYS_SEARCH_USER_PATHS = NO;
@ -219,13 +215,14 @@
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name = Release;
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17C2CB701C0F979D00A087DF /* Debug */ = {
5D72D2F21C16249000E22EC1 /* Debug */ = {
isa = XCBuildConfiguration;
buildSettings = {
HEADER_SEARCH_PATHS = (
"$(SRCROOT)/../../React/**",
"$(SRCROOT)/../react-native/React/**",
"$(SRCROOT)/node_modules/react-native/React/**",
"$(inherited)",
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include,
"$(SRCROOT)/../../react-native/React/**",
"$(SRCROOT)/../../react-native/Libraries/**",
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OTHER_LDFLAGS = "-ObjC";
PRODUCT_NAME = "$(TARGET_NAME)";
@ -233,13 +230,14 @@
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name = Debug;
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5D72D2F31C16249000E22EC1 /* Release */ = {
isa = XCBuildConfiguration;
buildSettings = {
HEADER_SEARCH_PATHS = (
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"$(inherited)",
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/include,
"$(SRCROOT)/../../react-native/React/**",
"$(SRCROOT)/../../react-native/Libraries/**",
);
OTHER_LDFLAGS = "-ObjC";
PRODUCT_NAME = "$(TARGET_NAME)";
@ -250,25 +248,25 @@
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11
RNImageResizer/ImageHelpers.h → ios/RCTImageResizer/ImageHelpers.h
View File

@ -1,13 +1,13 @@
/*
File: ImageHelpers.h
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
Inc. ("Apple") in consideration of your agreement to the following
terms, and your use, installation, modification or redistribution of
this Apple software constitutes acceptance of these terms. If you do
not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
@ -23,13 +23,13 @@
implied, are granted by Apple herein, including but not limited to any
patent rights that may be infringed by your derivative works or by other
works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
@ -38,7 +38,7 @@
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2009 Apple Inc. All Rights Reserved.
*/
@ -55,4 +55,3 @@ CGImageRef CreateCGImageFromUIImageScaled( UIImage* inImage, float scaleFactor
@interface UIImage (scale)
-(UIImage*)scaleToSize:(CGSize)toSize;
@end

179
ios/RCTImageResizer/ImageHelpers.m Normal file
View File

@ -0,0 +1,179 @@
/*
File: ImageHelpers.m
Disclaimer: IMPORTANT: This Apple software is supplied to you by Apple
Inc. ("Apple") in consideration of your agreement to the following
terms, and your use, installation, modification or redistribution of
this Apple software constitutes acceptance of these terms. If you do
not agree with these terms, please do not use, install, modify or
redistribute this Apple software.
In consideration of your agreement to abide by the following terms, and
subject to these terms, Apple grants you a personal, non-exclusive
license, under Apple's copyrights in this original Apple software (the
"Apple Software"), to use, reproduce, modify and redistribute the Apple
Software, with or without modifications, in source and/or binary forms;
provided that if you redistribute the Apple Software in its entirety and
without modifications, you must retain this notice and the following
text and disclaimers in all such redistributions of the Apple Software.
Neither the name, trademarks, service marks or logos of Apple Inc. may
be used to endorse or promote products derived from the Apple Software
without specific prior written permission from Apple. Except as
expressly stated in this notice, no other rights or licenses, express or
implied, are granted by Apple herein, including but not limited to any
patent rights that may be infringed by your derivative works or by other
works in which the Apple Software may be incorporated.
The Apple Software is provided by Apple on an "AS IS" basis. APPLE
MAKES NO WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION
THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND
OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL
OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION,
MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED
AND WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE),
STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGE.
Copyright (C) 2009 Apple Inc. All Rights Reserved.
*/
#include "ImageHelpers.h"
const CGBitmapInfo kDefaultCGBitmapInfo = (kCGImageAlphaPremultipliedFirst | kCGBitmapByteOrder32Host);
const CGBitmapInfo kDefaultCGBitmapInfoNoAlpha = (kCGImageAlphaNoneSkipFirst | kCGBitmapByteOrder32Host);
CGColorSpaceRef GetDeviceRGBColorSpace() {
static CGColorSpaceRef deviceRGBSpace = NULL;
if( deviceRGBSpace == NULL )
deviceRGBSpace = CGColorSpaceCreateDeviceRGB();
return deviceRGBSpace;
}
float GetScaleForProportionalResize( CGSize theSize, CGSize intoSize, bool onlyScaleDown, bool maximize )
{
float sx = theSize.width;
float sy = theSize.height;
float dx = intoSize.width;
float dy = intoSize.height;
float scale = 1;
if( sx != 0 && sy != 0 )
{
dx = dx / sx;
dy = dy / sy;
// if maximize is true, take LARGER of the scales, else smaller
if( maximize ) scale = (dx > dy) ? dx : dy;
else scale = (dx < dy) ? dx : dy;
if( scale > 1 && onlyScaleDown ) // reset scale
scale = 1;
}
else
{
scale = 0;
}
return scale;
}
CGContextRef CreateCGBitmapContextForWidthAndHeight( unsigned int width, unsigned int height,
CGColorSpaceRef optionalColorSpace, CGBitmapInfo optionalInfo )
{
CGColorSpaceRef colorSpace = (optionalColorSpace == NULL) ? GetDeviceRGBColorSpace() : optionalColorSpace;
CGBitmapInfo alphaInfo = ( (int32_t)optionalInfo < 0 ) ? kDefaultCGBitmapInfo : optionalInfo;
return CGBitmapContextCreate( NULL, width, height, 8, 0, colorSpace, alphaInfo );
}
CGImageRef CreateCGImageFromUIImageScaled( UIImage* image, float scaleFactor )
{
CGImageRef newImage = NULL;
CGContextRef bmContext = NULL;
BOOL mustTransform = YES;
CGAffineTransform transform = CGAffineTransformIdentity;
UIImageOrientation orientation = image.imageOrientation;
CGImageRef srcCGImage = CGImageRetain( image.CGImage );
size_t width = CGImageGetWidth(srcCGImage) * scaleFactor;
size_t height = CGImageGetHeight(srcCGImage) * scaleFactor;
// These Orientations are rotated 0 or 180 degrees, so they retain the width/height of the image
if( (orientation == UIImageOrientationUp) || (orientation == UIImageOrientationDown) || (orientation == UIImageOrientationUpMirrored) || (orientation == UIImageOrientationDownMirrored) )
{
bmContext = CreateCGBitmapContextForWidthAndHeight( width, height, NULL, kDefaultCGBitmapInfo );
}
else // The other Orientations are rotated ±90 degrees, so they swap width & height.
{
bmContext = CreateCGBitmapContextForWidthAndHeight( height, width, NULL, kDefaultCGBitmapInfo );
}
//CGContextSetInterpolationQuality( bmContext, kCGInterpolationLow );
CGContextSetBlendMode( bmContext, kCGBlendModeCopy ); // we just want to copy the data
switch(orientation)
{
case UIImageOrientationDown: // 0th row is at the bottom, and 0th column is on the right - Rotate 180 degrees
transform = CGAffineTransformMake(-1.0, 0.0, 0.0, -1.0, width, height);
break;
case UIImageOrientationLeft: // 0th row is on the left, and 0th column is the bottom - Rotate -90 degrees
transform = CGAffineTransformMake(0.0, 1.0, -1.0, 0.0, height, 0.0);
break;
case UIImageOrientationRight: // 0th row is on the right, and 0th column is the top - Rotate 90 degrees
transform = CGAffineTransformMake(0.0, -1.0, 1.0, 0.0, 0.0, width);
break;
case UIImageOrientationUpMirrored: // 0th row is at the top, and 0th column is on the right - Flip Horizontal
transform = CGAffineTransformMake(-1.0, 0.0, 0.0, 1.0, width, 0.0);
break;
case UIImageOrientationDownMirrored: // 0th row is at the bottom, and 0th column is on the left - Flip Vertical
transform = CGAffineTransformMake(1.0, 0.0, 0, -1.0, 0.0, height);
break;
case UIImageOrientationLeftMirrored: // 0th row is on the left, and 0th column is the top - Rotate -90 degrees and Flip Vertical
transform = CGAffineTransformMake(0.0, -1.0, -1.0, 0.0, height, width);
break;
case UIImageOrientationRightMirrored: // 0th row is on the right, and 0th column is the bottom - Rotate 90 degrees and Flip Vertical
transform = CGAffineTransformMake(0.0, 1.0, 1.0, 0.0, 0.0, 0.0);
break;
default:
mustTransform = NO;
break;
}
if( mustTransform ) CGContextConcatCTM( bmContext, transform );
CGContextDrawImage( bmContext, CGRectMake(0.0, 0.0, width, height), srcCGImage );
CGImageRelease( srcCGImage );
newImage = CGBitmapContextCreateImage( bmContext );
CFRelease( bmContext );
return newImage;
}
@implementation UIImage (scale)
-(UIImage*) scaleToSize:(CGSize)toSize
{
UIImage *scaledImg = nil;
float scale = GetScaleForProportionalResize( self.size, toSize, false, false );
CGImageRef cgImage = CreateCGImageFromUIImageScaled( self, scale );
if( cgImage )
{
scaledImg = [UIImage imageWithCGImage:cgImage]; // autoreleased
CGImageRelease( cgImage );
}
return scaledImg;
}
@end

5
ios/RCTImageResizer/RCTImageResizer.h Normal file
View File

@ -0,0 +1,5 @@
#import "RCTBridge.h"
@interface ImageResizer : NSObject <RCTBridgeModule>
@end

66
ios/RCTImageResizer/RCTImageResizer.m Normal file
View File

@ -0,0 +1,66 @@
//
// ImageResize.m
// ChoozItApp
//
// Created by Florian Rival on 19/11/15.
//
#include "RCTImageResizer.h"
#include "ImageHelpers.h"
#import "RCTImageLoader.h"
@implementation ImageResizer
@synthesize bridge = _bridge;
RCT_EXPORT_MODULE();
void saveImage(NSString * fullPath, UIImage * image, float quality)
{
NSData* data = UIImageJPEGRepresentation(image, quality / 100.0);
NSFileManager* fileManager = [NSFileManager defaultManager];
[fileManager createFileAtPath:fullPath contents:data attributes:nil];
}
NSString * generateCacheFilePath(NSString * ext)
{
NSArray* paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString* cacheDirectory = [paths firstObject];
NSString* name = [[NSUUID UUID] UUIDString];
NSString* fullName = [NSString stringWithFormat:@"%@.%@", name, ext];
NSString* fullPath = [cacheDirectory stringByAppendingPathComponent:fullName];
return fullPath;
}
RCT_EXPORT_METHOD(createResizedImage:(NSString *)path
width:(float)width
height:(float)height
quality:(float)quality
callback:(RCTResponseSenderBlock)callback)
{
CGSize newSize = CGSizeMake(width, height);
NSString* fullPath = generateCacheFilePath(@".jpg");
[_bridge.imageLoader loadImageWithTag:path callback:^(NSError *error, UIImage *image) {
if (error || image == nil) {
image = [[UIImage alloc] initWithContentsOfFile:path];
if (image == nil) {
callback(@[@"Can't retrieve the file from the path.", @""]);
return;
}
}
// Do the resizing
UIImage * scaledImage = [image scaleToSize:newSize];
if (scaledImage == nil) {
callback(@[@"Can't resize the image.", @""]);
return;
}
saveImage(fullPath, scaledImage, quality);
callback(@[[NSNull null], fullPath]);
}];
}
@end