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Commit c889d3c5 authored by Yiwei Zhang's avatar Yiwei Zhang
Browse files

libvulkan: make vkEnumerateInstanceVersion trigger driver loading 

This is a globally dispatched api, and it's the best option to preload
the driver in Zygote with minimum overhead.

This change also updates some return codes according to the spec.

Bug: 135536511
Test: take a trace and verify driver is loaded
Change-Id: I6fe425ec568b13577d3d9471aa5f181cff44c61c
parent 8dcf124c

vulkan/libvulkan/api.cpp

+7 −2
Original line number Diff line number Diff line
@@ -1256,7 +1256,7 @@ VkResult EnumerateInstanceLayerProperties(uint32_t* pPropertyCount, 
    ATRACE_CALL();



    if (!EnsureInitialized())

        return VK_ERROR_INITIALIZATION_FAILED;

        return VK_ERROR_OUT_OF_HOST_MEMORY;



    uint32_t count = GetLayerCount();
@@ -1280,7 +1280,7 @@ VkResult EnumerateInstanceExtensionProperties( 
    ATRACE_CALL();



    if (!EnsureInitialized())

        return VK_ERROR_INITIALIZATION_FAILED;

        return VK_ERROR_OUT_OF_HOST_MEMORY;



    if (pLayerName) {

        const Layer* layer = FindLayer(pLayerName);
@@ -1456,6 +1456,11 @@ VkResult EnumerateDeviceExtensionProperties( 
VkResult EnumerateInstanceVersion(uint32_t* pApiVersion) {

    ATRACE_CALL();



    // Load the driver here if not done yet. This api will be used in Zygote

    // for Vulkan driver pre-loading because of the minimum overhead.

    if (!EnsureInitialized())

        return VK_ERROR_OUT_OF_HOST_MEMORY;



    *pApiVersion = VK_API_VERSION_1_1;

    return VK_SUCCESS;

}