20 lines
875 B
Markdown
20 lines
875 B
Markdown
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## QtiMapper-shim
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A shim that translates between the IQtiMapper(2,3,4) API used by newer Adreno graphics drivers and gralloc1, which is the only available gralloc API on sdm845.
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### Method
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Exposes the same ABI as the newer mapper blobs and stubs enough functions to force the HAL to fallback to the 2.0 mapper/mapperextension API which is then shimmed with a passthrough to gralloc1. The blobs can then be patched to load the stub libs instead, see the blob-patcher script.
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The code is fairly ugly but functional enough for the purpose, some functions are missing and will need to be implemented in the case that the driver starts using them.
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### Building
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Chuck into a lineage tree, then:
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```
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make vendor.qti.hardware.display.mappershim
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make vendor.qti.hardware.display.mapperextensionsshim
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make android.hardware.graphics.mappershim
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```
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and grab SOs out of outputs dir
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