Enumerate initial version of VK_GOOGLE_display_timing

The implementation seems correct with the exception that it is not obtaining
the refresh durations from SurfaceFlinger/HAL.  A maximum of 10 TimingInfo's
(containing the timing for previous presents) are stored, and timestamps are
only queried from SurfaceFlinger for presents (a.k.a. frames) that occured 5
presents/frames ago.

Test: Manually tested with a modified cube demo, that changes its timing as a
result of the data returned from this extension.

Change-Id: I199614ed58877b64eab2568a76ba517acca3bf87

1 files changed, 7 insertions, 1 deletions

diff --git a/vulkan/libvulkan/driver.cpp b/vulkan/libvulkan/driver.cpp
index 800e474e8a..6c9a449d9c 100644
--- a/vulkan/libvulkan/driver.cpp
+++ b/vulkan/libvulkan/driver.cpp
@@ -405,6 +405,10 @@ void CreateInfoWrapper::FilterExtension(const char* name) {
                 name = VK_ANDROID_NATIVE_BUFFER_EXTENSION_NAME;
                 ext_bit = ProcHook::ANDROID_native_buffer;
                 break;
+            case ProcHook::GOOGLE_display_timing:
+                hook_extensions_.set(ext_bit);
+                // return now as these extensions do not require HAL support
+                return;
             case ProcHook::EXTENSION_UNKNOWN:
                 // HAL's extensions
                 break;
@@ -663,10 +667,12 @@ VkResult EnumerateDeviceExtensionProperties(
     uint32_t* pPropertyCount,
     VkExtensionProperties* pProperties) {
     const InstanceData& data = GetData(physicalDevice);
-    static const std::array<VkExtensionProperties, 1> loader_extensions = {{
+    static const std::array<VkExtensionProperties, 2> loader_extensions = {{
         // WSI extensions
         {VK_KHR_INCREMENTAL_PRESENT_EXTENSION_NAME,
          VK_KHR_INCREMENTAL_PRESENT_SPEC_VERSION},
+        {VK_GOOGLE_DISPLAY_TIMING_EXTENSION_NAME,
+         VK_GOOGLE_DISPLAY_TIMING_SPEC_VERSION},
     }};
 
     // enumerate our extensions first