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37 lines
1.5 KiB
37 lines
1.5 KiB
4 months ago
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# Steps to regenerate background text images under res-*dpi/images/
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1. Build the recovery_l10n app:
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cd bootable/recovery && mma -j32
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2. Install the app on the device (or emulator) with the intended dpi.
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* For example, we can use Nexus 5 to generate the text images under
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res-xxhdpi.
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* We can set up the maximum width of the final png image in res/layout/main.xml
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Currently, the image width is 1200px for xxxhdpi, 900px for xxhdpi and
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480px for xhdpi/hdpi/mdpi.
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* When using the emulator, make sure the NDK version matches the current
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repository. Otherwise, the app may not work properly.
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adb install $PATH_TO_APP
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3. Run the app, select the string to translate and press the 'go' button.
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4. After the app goes through the strings for all locales, pull the output png
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file from the device.
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adb root && adb pull /data/data/com.android.recovery_l10n/files/text-out.png
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5. Compress the output file put it under the corresponding directory.
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* "pngcrush -c 0 ..." converts "text-out.png" into a 1-channel image,
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which is accepted by Recovery. This also compresses the image file by
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~60%.
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* zopflipng could further compress the png files by ~10%, more details
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in https://github.com/google/zopfli/blob/master/README.zopflipng
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* If you're using other png compression tools, make sure the final text
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image works by running graphic tests under the recovery mode.
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pngcrush -c 0 text-out.png $OUTPUT_PNG
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