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Doric/doric-iOS/Pod/Classes/Plugin/DoricImageDecoderPlugin.m
2022-01-26 15:38:49 +08:00

75 lines
3.1 KiB
Objective-C

/*
* Copyright [2019] [Doric.Pub]
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
//
// Created by jingpeng.wang on 2022/1/10.
//
#import <DoricCore/Doric.h>
#import "DoricImageDecoderPlugin.h"
#import "DoricExtensions.h"
@implementation DoricImageDecoderPlugin
- (void)getImageInfo:(NSDictionary *)resource withPromise:(DoricPromise *)promise {
DoricResource *doricResource = [self.doricContext.driver.registry.loaderManager load:resource withContext:self.doricContext];
if (doricResource != nil) {
DoricAsyncResult *asyncResult = [doricResource fetch];
[asyncResult setResultCallback:^(id _Nonnull result) {
UIImage *image = [UIImage imageWithData:result];
[promise resolve:@{
@"width": @(image.size.width),
@"height": @(image.size.height)
}];
}];
} else {
DoricLog(@"Cannot find loader for resource %s", resource.description);
[promise reject:@"Load error"];
}
}
- (void)decodeToPixels:(NSDictionary *)resource withPromise:(DoricPromise *)promise {
DoricResource *doricResource = [self.doricContext.driver.registry.loaderManager load:resource withContext:self.doricContext];
if (doricResource != nil) {
DoricAsyncResult *asyncResult = [doricResource fetch];
[asyncResult setResultCallback:^(id _Nonnull result) {
UIImage *image = [UIImage imageWithData:result];
CGImageRef imageRef = image.CGImage;
NSUInteger iWidth = CGImageGetWidth(imageRef);
NSUInteger iHeight = CGImageGetHeight(imageRef);
NSUInteger iBytesPerPixel = 4;
NSUInteger iBytesPerRow = iBytesPerPixel * iWidth;
NSUInteger iBitsPerComponent = 8;
unsigned char *imageBytes = malloc(iWidth * iHeight * iBytesPerPixel);
CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB();
CGContextRef context = CGBitmapContextCreate(imageBytes, iWidth, iHeight, iBitsPerComponent, iBytesPerRow, colorspace, kCGImageAlphaPremultipliedLast);
CGRect rect = CGRectMake(0, 0, iWidth, iHeight);
CGContextDrawImage(context, rect, imageRef);
CGColorSpaceRelease(colorspace);
CGContextRelease(context);
NSData* data = [NSData dataWithBytes:(const void *)imageBytes length:sizeof(unsigned char) * iWidth * iHeight * iBytesPerPixel];
[promise resolve:data];
}];
} else {
DoricLog(@"Cannot find loader for resource %s", resource.description);
[promise reject:@"Load error"];
}
}
@end