mirror of
https://github.com/status-im/react-native.git
synced 2025-01-09 09:12:02 +00:00
37f4ec6e16
Summary: To prevent layout popping, when inserting images inside text we would render a blank placeholder image while the real image was loading. It turns out that this isn't necessary, as we can just specify the size of the image without having an actual image to display. Reviewed By: javache Differential Revision: D3212766 fb-gh-sync-id: e98851b32a2d0ae809fc0a4be47e6b77f3b17996 fbshipit-source-id: e98851b32a2d0ae809fc0a4be47e6b77f3b17996
97 lines
4.1 KiB
Objective-C
97 lines
4.1 KiB
Objective-C
/*
|
|
* Copyright (c) 2013, Facebook, Inc.
|
|
* All rights reserved.
|
|
*
|
|
* This source code is licensed under the BSD-style license found in the
|
|
* LICENSE file in the root directory of this source tree. An additional grant
|
|
* of patent rights can be found in the PATENTS file in the same directory.
|
|
*
|
|
*/
|
|
|
|
#import <UIKit/UIKit.h>
|
|
|
|
#import "RCTDefines.h"
|
|
#import "RCTResizeMode.h"
|
|
|
|
NS_ASSUME_NONNULL_BEGIN
|
|
|
|
/**
|
|
* This function takes an source size (typically from an image), a target size
|
|
* and scale that it will be drawn at (typically in a CGContext) and then
|
|
* calculates the rectangle to draw the image into so that it will be sized and
|
|
* positioned correctly according to the specified resizeMode.
|
|
*/
|
|
RCT_EXTERN CGRect RCTTargetRect(CGSize sourceSize, CGSize destSize,
|
|
CGFloat destScale, RCTResizeMode resizeMode);
|
|
|
|
/**
|
|
* This function takes a source size (typically from an image), a target rect
|
|
* that it will be drawn into (typically relative to a CGContext), and works out
|
|
* the transform needed to draw the image at the correct scale and position.
|
|
*/
|
|
RCT_EXTERN CGAffineTransform RCTTransformFromTargetRect(CGSize sourceSize,
|
|
CGRect targetRect);
|
|
|
|
/**
|
|
* This function takes an input content size & scale (typically from an image),
|
|
* a target size & scale at which it will be displayed (typically in a
|
|
* UIImageView) and then calculates the optimal size at which to redraw the
|
|
* image so that it will be displayed correctly with the specified resizeMode.
|
|
*/
|
|
RCT_EXTERN CGSize RCTTargetSize(CGSize sourceSize, CGFloat sourceScale,
|
|
CGSize destSize, CGFloat destScale,
|
|
RCTResizeMode resizeMode, BOOL allowUpscaling);
|
|
|
|
/**
|
|
* This function takes an input content size & scale (typically from an image),
|
|
* a target size & scale that it will be displayed at, and determines if the
|
|
* source will need to be upscaled to fit (which may result in pixelization).
|
|
*/
|
|
RCT_EXTERN BOOL RCTUpscalingRequired(CGSize sourceSize, CGFloat sourceScale,
|
|
CGSize destSize, CGFloat destScale,
|
|
RCTResizeMode resizeMode);
|
|
|
|
/**
|
|
* This function takes the source data for an image and decodes it at the
|
|
* specified size. If the original image is smaller than the destination size,
|
|
* the resultant image's scale will be decreased to compensate, so the
|
|
* width/height of the returned image is guaranteed to be >= destSize.
|
|
* Pass a destSize of CGSizeZero to decode the image at its original size.
|
|
*/
|
|
RCT_EXTERN UIImage *__nullable RCTDecodeImageWithData(NSData *data,
|
|
CGSize destSize,
|
|
CGFloat destScale,
|
|
RCTResizeMode resizeMode);
|
|
|
|
/**
|
|
* This function takes the source data for an image and decodes just the
|
|
* metadata, without decompressing the image itself.
|
|
*/
|
|
RCT_EXTERN NSDictionary<NSString *, id> *__nullable RCTGetImageMetadata(NSData *data);
|
|
|
|
/**
|
|
* Convert an image back into data. Images with an alpha channel will be
|
|
* converted to lossless PNG data. Images without alpha will be converted to
|
|
* JPEG. The `quality` argument controls the compression ratio of the JPEG
|
|
* conversion, with 1.0 being maximum quality. It has no effect for images
|
|
* using PNG compression.
|
|
*/
|
|
RCT_EXTERN NSData *__nullable RCTGetImageData(CGImageRef image, float quality);
|
|
|
|
/**
|
|
* This function transforms an image. `destSize` is the size of the final image,
|
|
* and `destScale` is its scale. The `transform` argument controls how the
|
|
* source image will be mapped to the destination image.
|
|
*/
|
|
RCT_EXTERN UIImage *__nullable RCTTransformImage(UIImage *image,
|
|
CGSize destSize,
|
|
CGFloat destScale,
|
|
CGAffineTransform transform);
|
|
|
|
/*
|
|
* Return YES if image has an alpha component
|
|
*/
|
|
RCT_EXTERN BOOL RCTImageHasAlpha(CGImageRef image);
|
|
|
|
NS_ASSUME_NONNULL_END
|