Nick Lockwood 21fcbbc32c Generalized image decoding and resizing logic
Summary:
public

Standardises the image decoding logic for all image sources, meaning we get the benefits of efficient downscaling of images from all sources, not just ALAssets.

Reviewed By: javache

Differential Revision: D2647083

fb-gh-sync-id: e41456f838e4c6ab709b1c1523f651a86ff6e623
2016-01-20 11:11:13 -08:00

137 lines
3.5 KiB
Objective-C

/**
* The examples provided by Facebook are for non-commercial testing and
* evaluation purposes only.
*
* Facebook reserves all rights not expressly granted.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NON INFRINGEMENT. IN NO EVENT SHALL
* FACEBOOK BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
* AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#import <CoreGraphics/CoreGraphics.h>
#import <Foundation/Foundation.h>
#import <UIKit/UIView.h>
#import <XCTest/XCTest.h>
#import "RCTImageUtils.h"
#define RCTAssertEqualPoints(a, b) { \
XCTAssertEqual(a.x, b.x); \
XCTAssertEqual(a.y, b.y); \
}
#define RCTAssertEqualSizes(a, b) { \
XCTAssertEqual(a.width, b.width); \
XCTAssertEqual(a.height, b.height); \
}
#define RCTAssertEqualRects(a, b) { \
RCTAssertEqualPoints(a.origin, b.origin); \
RCTAssertEqualSizes(a.size, b.size); \
}
@interface RCTImageUtilTests : XCTestCase
@end
@implementation RCTImageUtilTests
- (void)testLandscapeSourceLandscapeTarget
{
CGSize content = {1000, 100};
CGSize target = {100, 20};
{
CGRect expected = {CGPointZero, {100, 20}};
CGRect result = RCTTargetRect(content, target, 1, RCTResizeModeStretch);
RCTAssertEqualRects(expected, result);
}
{
CGRect expected = {{0, 5}, {100, 10}};
CGRect result = RCTTargetRect(content, target, 1, RCTResizeModeContain);
RCTAssertEqualRects(expected, result);
}
{
CGRect expected = {{-50, 0}, {200, 20}};
CGRect result = RCTTargetRect(content, target, 1, RCTResizeModeCover);
RCTAssertEqualRects(expected, result);
}
}
- (void)testPortraitSourceLandscapeTarget
{
CGSize content = {10, 100};
CGSize target = {100, 20};
{
CGRect expected = {CGPointZero, {100, 20}};
CGRect result = RCTTargetRect(content, target, 1, RCTResizeModeStretch);
RCTAssertEqualRects(expected, result);
}
{
CGRect expected = {{49, 0}, {2, 20}};
CGRect result = RCTTargetRect(content, target, 1, RCTResizeModeContain);
RCTAssertEqualRects(expected, result);
}
{
CGRect expected = {{0, -490}, {100, 1000}};
CGRect result = RCTTargetRect(content, target, 1, RCTResizeModeCover);
RCTAssertEqualRects(expected, result);
}
}
- (void)testPortraitSourcePortraitTarget
{
CGSize content = {10, 100};
CGSize target = {20, 50};
{
CGRect expected = {CGPointZero, {20, 50}};
CGRect result = RCTTargetRect(content, target, 1, RCTResizeModeStretch);
RCTAssertEqualRects(expected, result);
}
{
CGRect expected = {{7,0}, {5, 50}};
CGRect result = RCTTargetRect(content, target, 1, RCTResizeModeContain);
RCTAssertEqualRects(expected, result);
}
{
CGRect expected = {{0, -75}, {20, 200}};
CGRect result = RCTTargetRect(content, target, 2, RCTResizeModeCover);
RCTAssertEqualRects(expected, result);
}
}
- (void)testRounding
{
CGSize content = {10, 100};
CGSize target = {20, 50};
{
CGRect expected = {{0, -75}, {20, 200}};
CGRect result = RCTTargetRect(content, target, 1, RCTResizeModeCover);
RCTAssertEqualRects(expected, result);
}
}
- (void)testScaling
{
CGSize content = {2, 2};
CGSize target = {3, 3};
CGRect expected = {CGPointZero, {3, 3}};
CGRect result = RCTTargetRect(content, target, 1, RCTResizeModeStretch);
RCTAssertEqualRects(expected, result);
}
@end