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Signed-off-by: cls_宁波本机 <908705107@qq.com>
52 lines
2.2 KiB
Markdown
52 lines
2.2 KiB
Markdown
# UIKit media fixtures
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These 2 x 2 fixtures were produced on an iOS simulator with UIKit, not by a generic image encoder.
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## Regeneration
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1. Create a small source image and run this program against the simulator SDK:
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```swift
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import Foundation
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import UIKit
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let arguments = CommandLine.arguments
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let source = try Data(contentsOf: URL(fileURLWithPath: arguments[1]))
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guard
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let image = UIImage(data: source),
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let png = image.pngData(),
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let jpeg = image.jpegData(compressionQuality: 1.0)
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else {
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fatalError("UIKit could not encode the source image")
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}
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try png.write(to: URL(fileURLWithPath: arguments[2]))
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try jpeg.write(to: URL(fileURLWithPath: arguments[3]))
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```
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Compile and run it with the active Xcode toolchain:
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```sh
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SDK_PATH="$(xcrun --sdk iphonesimulator --show-sdk-path)"
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xcrun --sdk iphonesimulator swiftc \
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-sdk "$SDK_PATH" \
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-target arm64-apple-ios16.0-simulator \
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reencode.swift -o reencode
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xcrun simctl spawn booted ./reencode \
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source.png uikit-encoded.png uikit-encoded.jpg
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```
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2. Copy the encoded files into both fixture directories:
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```sh
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cp uikit-encoded.png mobile/ios/RunnerTests/Fixtures/UIKitEncoded.png
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cp uikit-encoded.jpg mobile/ios/RunnerTests/Fixtures/UIKitEncoded.jpg
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cp uikit-encoded.png crates/buzz-media/tests/fixtures/ios/
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cp uikit-encoded.jpg crates/buzz-media/tests/fixtures/ios/
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```
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3. Add a temporary Runner test that loads `UIKitEncoded.png` and `UIKitEncoded.jpg`, calls `MediaSanitizer.scrubPng` and `MediaSanitizer.scrubJpeg`, and writes those outputs to `uikit-sanitized.png` and `uikit-sanitized.jpg`. Run it once, copy the files here, then remove the temporary test.
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4. Run `cmp` on each encoded copy to confirm that the Runner and Rust fixtures are byte-identical.
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5. Run `cargo test -p buzz-media test_ios_uikit` to verify that UIKit's encoded output is rejected and the matching sanitizer output is accepted by the relay contract.
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Regenerate both encoded and sanitized pairs whenever UIKit encoding or `MediaSanitizer` changes. Do not update only the sanitized files, because the test is intended to cover the exact encoder-to-sanitizer boundary.
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