Advertise the VK_EXT_post_depth_coverage extension.
iOS only, and only on A11/A12 devices (GPU Family 4/5).
diff --git a/Docs/MoltenVK_Runtime_UserGuide.md b/Docs/MoltenVK_Runtime_UserGuide.md
index 059f802..cf917bc 100644
--- a/Docs/MoltenVK_Runtime_UserGuide.md
+++ b/Docs/MoltenVK_Runtime_UserGuide.md
@@ -255,6 +255,7 @@
- `VK_EXT_host_query_reset`
- `VK_EXT_memory_budget` *(requires Metal 2.0)*
- `VK_EXT_metal_surface`
+- `VK_EXT_post_depth_coverage` *(iOS, requires GPU family 4)*
- `VK_EXT_scalar_block_layout`
- `VK_EXT_shader_stencil_export` *(requires Mac GPU family 2 or iOS GPU family 5)*
- `VK_EXT_shader_viewport_index_layer`
diff --git a/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h b/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h
index 27bac91..f5d029d 100644
--- a/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h
+++ b/MoltenVK/MoltenVK/API/vk_mvk_moltenvk.h
@@ -539,6 +539,7 @@
VkBool32 multisampleLayeredRendering; /**< If true, layered rendering to multiple multi-sampled cube or texture array layers is supported. */
VkBool32 stencilFeedback; /**< If true, fragment shaders that write to [[stencil]] outputs are supported. */
VkBool32 textureBuffers; /**< If true, textures of type MTLTextureTypeBuffer are supported. */
+ VkBool32 postDepthCoverage; /**< If true, coverage masks in fragment shaders post-depth-test are supported. */
} MVKPhysicalDeviceMetalFeatures;
/**
diff --git a/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm b/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
index 18dc47d..2ca1daf 100644
--- a/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
+++ b/MoltenVK/MoltenVK/GPUObjects/MVKDevice.mm
@@ -791,6 +791,10 @@
_metalFeatures.arrayOfSamplers = true;
}
+ if ( [_mtlDevice supportsFeatureSet: MTLFeatureSet_iOS_GPUFamily4_v1] ) {
+ _metalFeatures.postDepthCoverage = true;
+ }
+
if ( [_mtlDevice supportsFeatureSet: MTLFeatureSet_iOS_GPUFamily5_v1] ) {
_metalFeatures.layeredRendering = true;
_metalFeatures.stencilFeedback = true;
@@ -1616,6 +1620,9 @@
}
void MVKPhysicalDevice::initExtensions() {
+ if (!_metalFeatures.postDepthCoverage) {
+ _supportedExtensions.vk_EXT_post_depth_coverage.enabled = false;
+ }
if (!_metalFeatures.stencilFeedback) {
_supportedExtensions.vk_EXT_shader_stencil_export.enabled = false;
}
diff --git a/MoltenVK/MoltenVK/Layers/MVKExtensions.def b/MoltenVK/MoltenVK/Layers/MVKExtensions.def
index 3c8b08a..3bb8f43 100644
--- a/MoltenVK/MoltenVK/Layers/MVKExtensions.def
+++ b/MoltenVK/MoltenVK/Layers/MVKExtensions.def
@@ -59,6 +59,7 @@
MVK_EXTENSION(EXT_host_query_reset, EXT_HOST_QUERY_RESET)
MVK_EXTENSION(EXT_memory_budget, EXT_MEMORY_BUDGET)
MVK_EXTENSION(EXT_metal_surface, EXT_METAL_SURFACE)
+MVK_EXTENSION(EXT_post_depth_coverage, EXT_POST_DEPTH_COVERAGE)
MVK_EXTENSION(EXT_scalar_block_layout, EXT_SCALAR_BLOCK_LAYOUT)
MVK_EXTENSION(EXT_shader_stencil_export, EXT_SHADER_STENCIL_EXPORT)
MVK_EXTENSION(EXT_shader_viewport_index_layer, EXT_SHADER_VIEWPORT_INDEX_LAYER)
diff --git a/MoltenVK/MoltenVK/Layers/MVKExtensions.mm b/MoltenVK/MoltenVK/Layers/MVKExtensions.mm
index 1ba1a70..d89e322 100644
--- a/MoltenVK/MoltenVK/Layers/MVKExtensions.mm
+++ b/MoltenVK/MoltenVK/Layers/MVKExtensions.mm
@@ -50,6 +50,7 @@
if (pProperties == &kVkExtProps_EXT_MEMORY_BUDGET) {
return mvkOSVersion() >= 10.13;
}
+ if (pProperties == &kVkExtProps_EXT_POST_DEPTH_COVERAGE) { return false; }
if (pProperties == &kVkExtProps_EXT_SHADER_STENCIL_EXPORT) {
return mvkOSVersion() >= 10.14;
}
@@ -65,6 +66,9 @@
if (pProperties == &kVkExtProps_EXT_MEMORY_BUDGET) {
return mvkOSVersion() >= 11.0;
}
+ if (pProperties == &kVkExtProps_EXT_POST_DEPTH_COVERAGE) {
+ return mvkOSVersion() >= 11.0;
+ }
if (pProperties == &kVkExtProps_EXT_SHADER_STENCIL_EXPORT) {
return mvkOSVersion() >= 12.0;
}
