hwcontext_vulkan: expose the enabled device features

With this, the puzzle of making libplacebo, ffmpeg and any other Vulkan
API users interoperable is complete.
Users of both libraries can initialize one another's contexts without having
to create a new one.

1 files changed, 11 insertions, 0 deletions

diff --git a/libavutil/hwcontext_vulkan.c b/libavutil/hwcontext_vulkan.c
index 2fb9c5dbfa..83de4b5cb7 100644
--- a/libavutil/hwcontext_vulkan.c
+++ b/libavutil/hwcontext_vulkan.c
@@ -807,6 +807,7 @@ static int vulkan_device_create_internal(AVHWDeviceContext *ctx,
     AVDictionaryEntry *opt_d;
     VulkanDevicePriv *p = ctx->internal->priv;
     AVVulkanDeviceContext *hwctx = ctx->hwctx;
+    VkPhysicalDeviceFeatures dev_features = { 0 };
     VkDeviceQueueCreateInfo queue_create_info[3] = {
         { .sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO, },
         { .sType = VK_STRUCTURE_TYPE_DEVICE_QUEUE_CREATE_INFO, },
@@ -815,10 +816,12 @@ static int vulkan_device_create_internal(AVHWDeviceContext *ctx,
 
     VkDeviceCreateInfo dev_info = {
         .sType                = VK_STRUCTURE_TYPE_DEVICE_CREATE_INFO,
+        .pNext                = &hwctx->device_features,
         .pQueueCreateInfos    = queue_create_info,
         .queueCreateInfoCount = 0,
     };
 
+    hwctx->device_features.sType = VK_STRUCTURE_TYPE_PHYSICAL_DEVICE_FEATURES_2;
     ctx->free = vulkan_device_free;
 
     /* Create an instance if not given one */
@@ -839,6 +842,14 @@ static int vulkan_device_create_internal(AVHWDeviceContext *ctx,
     av_log(ctx, AV_LOG_VERBOSE, "    minMemoryMapAlignment:              %li\n",
            p->props.limits.minMemoryMapAlignment);
 
+    vkGetPhysicalDeviceFeatures(hwctx->phys_dev, &dev_features);
+#define COPY_FEATURE(DST, NAME) (DST).features.NAME = dev_features.NAME;
+    COPY_FEATURE(hwctx->device_features, shaderImageGatherExtended)
+    COPY_FEATURE(hwctx->device_features, fragmentStoresAndAtomics)
+    COPY_FEATURE(hwctx->device_features, vertexPipelineStoresAndAtomics)
+    COPY_FEATURE(hwctx->device_features, shaderInt64)
+#undef COPY_FEATURE
+
     /* Search queue family */
     if ((err = search_queue_families(ctx, &dev_info)))
         goto end;