// Copyright 2021 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#import "ios/chrome/common/ui/util/image_util.h"
#import "testing/gtest/include/gtest/gtest.h"
#import "testing/gtest_mac.h"
#import "testing/platform_test.h"
using ImageUtilTest = PlatformTest;
#define EXPECT_EQ_RECT(a, b) \
EXPECT_NSEQ(NSStringFromCGRect(a), NSStringFromCGRect(b))
#define EXPECT_EQ_SIZE(a, b) \
EXPECT_NSEQ(NSStringFromCGSize(a), NSStringFromCGSize(b))
TEST_F(ImageUtilTest, TestProjectionFill) {
CGSize originalSize, targetSize, expectedRevisedSize, revisedSize;
CGRect expectedProjection, projection;
// Resize with same aspect ratio.
originalSize = CGSizeMake(100, 100);
targetSize = CGSizeMake(50, 50);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(0, 0, 50, 50);
CalculateProjection(originalSize, targetSize, ProjectionMode::kFill,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Resize with different aspect ratio.
originalSize = CGSizeMake(100, 100);
targetSize = CGSizeMake(60, 40);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(0, 0, 60, 40);
CalculateProjection(originalSize, targetSize, ProjectionMode::kFill,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Stretch the other way.
originalSize = CGSizeMake(100, 100);
targetSize = CGSizeMake(40, 60);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(0, 0, 40, 60);
CalculateProjection(originalSize, targetSize, ProjectionMode::kFill,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
}
TEST_F(ImageUtilTest, TestProjectionFit) {
CGSize originalSize, targetSize, expectedRevisedSize, revisedSize;
CGRect expectedProjection, projection;
// Landscape resize to 50x50, but squeezed into 50x25.
originalSize = CGSizeMake(100, 50);
targetSize = CGSizeMake(50, 50);
expectedRevisedSize = CGSizeMake(50, 25);
expectedProjection = CGRectMake(0, 0, 50, 25);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFit,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Landscape resize to 60x40, but squeezed into 60x30.
originalSize = CGSizeMake(100, 50);
targetSize = CGSizeMake(60, 40);
expectedRevisedSize = CGSizeMake(60, 30);
expectedProjection = CGRectMake(0, 0, 60, 30);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFit,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Landscape resize to 40x60, but squeezed into 40x20.
originalSize = CGSizeMake(100, 50);
targetSize = CGSizeMake(40, 60);
expectedRevisedSize = CGSizeMake(40, 20);
expectedProjection = CGRectMake(0, 0, 40, 20);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFit,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Portrait resize to 50x50, but squeezed into 25x50.
originalSize = CGSizeMake(50, 100);
targetSize = CGSizeMake(50, 50);
expectedRevisedSize = CGSizeMake(25, 50);
expectedProjection = CGRectMake(0, 0, 25, 50);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFit,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Portrait resize to 60x40, but squeezed into 20x40.
originalSize = CGSizeMake(50, 100);
targetSize = CGSizeMake(60, 40);
expectedRevisedSize = CGSizeMake(20, 40);
expectedProjection = CGRectMake(0, 0, 20, 40);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFit,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Portrait resize to 40x60, but squeezed into 30x60.
originalSize = CGSizeMake(50, 100);
targetSize = CGSizeMake(40, 60);
expectedRevisedSize = CGSizeMake(30, 60);
expectedProjection = CGRectMake(0, 0, 30, 60);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFit,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
}
TEST_F(ImageUtilTest, TestProjectionAspectFill) {
CGSize originalSize, targetSize, expectedRevisedSize, revisedSize;
CGRect expectedProjection, projection;
// Landscape resize to 50x50
originalSize = CGSizeMake(100, 50);
targetSize = CGSizeMake(50, 50);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(-25, 0, 100, 50);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFill,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Landscape resize to 60x40, but squeezed into 60x30.
originalSize = CGSizeMake(100, 50);
targetSize = CGSizeMake(60, 40);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(-10, 0, 80, 40);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFill,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Landscape resize to 40x60, but squeezed into 40x20.
originalSize = CGSizeMake(100, 50);
targetSize = CGSizeMake(40, 60);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(-40, 0, 120, 60);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFill,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Portrait resize to 50x50, but squeezed into 25x50.
originalSize = CGSizeMake(50, 100);
targetSize = CGSizeMake(50, 50);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(0, -25, 50, 100);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFill,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Portrait resize to 60x40, but clipped to 20x40.
originalSize = CGSizeMake(50, 100);
targetSize = CGSizeMake(60, 40);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(0, -40, 60, 120);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFill,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Portrait resize to 40x60, but clipped to 30x60.
originalSize = CGSizeMake(50, 100);
targetSize = CGSizeMake(40, 60);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(0, -10, 40, 80);
CalculateProjection(originalSize, targetSize, ProjectionMode::kAspectFill,
revisedSize, projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
}
TEST_F(ImageUtilTest, TestProjectionAspectFillAlignTop) {
CGSize originalSize, targetSize, expectedRevisedSize, revisedSize;
CGRect expectedProjection, projection;
// Landscape resize to 100x100
originalSize = CGSizeMake(400, 200);
targetSize = CGSizeMake(100, 100);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(-50, 0, 200, 100);
CalculateProjection(originalSize, targetSize,
ProjectionMode::kAspectFillAlignTop, revisedSize,
projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Portrait resize to 100x100 and aligned to top
originalSize = CGSizeMake(200, 400);
targetSize = CGSizeMake(100, 100);
expectedRevisedSize = targetSize;
expectedProjection = CGRectMake(0, 0, 100, 200);
CalculateProjection(originalSize, targetSize,
ProjectionMode::kAspectFillAlignTop, revisedSize,
projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
}
TEST_F(ImageUtilTest, TestProjectionAspectFillNoClipping) {
CGSize originalSize, targetSize, expectedRevisedSize, revisedSize;
CGRect expectedProjection, projection;
// Landscape resize to 50x50
originalSize = CGSizeMake(100, 50);
targetSize = CGSizeMake(50, 50);
expectedProjection = CGRectMake(0, 0, 100, 50);
expectedRevisedSize = expectedProjection.size;
CalculateProjection(originalSize, targetSize,
ProjectionMode::kAspectFillNoClipping, revisedSize,
projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Landscape resize to 60x40.
originalSize = CGSizeMake(100, 50);
targetSize = CGSizeMake(60, 40);
expectedProjection = CGRectMake(0, 0, 80, 40);
expectedRevisedSize = expectedProjection.size;
CalculateProjection(originalSize, targetSize,
ProjectionMode::kAspectFillNoClipping, revisedSize,
projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Landscape resize to 40x60.
originalSize = CGSizeMake(100, 50);
targetSize = CGSizeMake(40, 60);
expectedProjection = CGRectMake(0, 0, 120, 60);
expectedRevisedSize = expectedProjection.size;
CalculateProjection(originalSize, targetSize,
ProjectionMode::kAspectFillNoClipping, revisedSize,
projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Portrait resize to 50x50.
originalSize = CGSizeMake(50, 100);
targetSize = CGSizeMake(50, 50);
expectedProjection = CGRectMake(0, 0, 50, 100);
expectedRevisedSize = expectedProjection.size;
CalculateProjection(originalSize, targetSize,
ProjectionMode::kAspectFillNoClipping, revisedSize,
projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Portrait resize to 60x40.
originalSize = CGSizeMake(50, 100);
targetSize = CGSizeMake(60, 40);
expectedProjection = CGRectMake(0, 0, 60, 120);
expectedRevisedSize = expectedProjection.size;
CalculateProjection(originalSize, targetSize,
ProjectionMode::kAspectFillNoClipping, revisedSize,
projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
// Portrait resize to 40x60.
originalSize = CGSizeMake(50, 100);
targetSize = CGSizeMake(40, 60);
expectedProjection = CGRectMake(0, 0, 40, 80);
expectedRevisedSize = expectedProjection.size;
CalculateProjection(originalSize, targetSize,
ProjectionMode::kAspectFillNoClipping, revisedSize,
projection);
EXPECT_EQ_RECT(expectedProjection, projection);
EXPECT_EQ_SIZE(expectedRevisedSize, revisedSize);
}
// Returns an image of random color in the same scale as the device main
// screen.
UIImage* testImage(CGSize imageSize) {
UIGraphicsImageRendererFormat* format =
[UIGraphicsImageRendererFormat preferredFormat];
format.opaque = NO;
UIGraphicsImageRenderer* renderer =
[[UIGraphicsImageRenderer alloc] initWithSize:imageSize format:format];
return
[renderer imageWithActions:^(UIGraphicsImageRendererContext* UIContext) {
CGContextRef context = UIContext.CGContext;
CGContextSetRGBStrokeColor(context, 0, 0, 0, 1.0);
CGContextSetRGBFillColor(context, 0, 0, 0, 1.0);
CGContextFillRect(
context, CGRectMake(0.0, 0.0, imageSize.width, imageSize.height));
}];
}
TEST_F(ImageUtilTest, TestResizeImageOpacity) {
UIImage* actual;
UIImage* image = testImage(CGSizeMake(100, 100));
actual =
ResizeImage(image, CGSizeMake(50, 50), ProjectionMode::kAspectFit, YES);
EXPECT_TRUE(actual);
actual =
ResizeImage(image, CGSizeMake(50, 50), ProjectionMode::kAspectFit, NO);
EXPECT_TRUE(actual);
}
TEST_F(ImageUtilTest, TestResizeImageInvalidInput) {
UIImage* actual;
UIImage* image = testImage(CGSizeMake(100, 50));
actual = ResizeImage(image, CGSizeZero, ProjectionMode::kAspectFit);
EXPECT_FALSE(actual);
actual = ResizeImage(image, CGSizeMake(0.1, 0.1), ProjectionMode::kAspectFit);
EXPECT_FALSE(actual);
actual =
ResizeImage(image, CGSizeMake(-100, -100), ProjectionMode::kAspectFit);
EXPECT_FALSE(actual);
actual = ResizeImage(nil, CGSizeMake(100, 100), ProjectionMode::kAspectFit);
EXPECT_FALSE(actual);
}
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