From 883e5bcaedbb70238fb65de804ba69ae4bead19c Mon Sep 17 00:00:00 2001
From: Pierre Krieger <pierre.krieger1708@gmail.com>
Date: Sat, 15 Oct 2016 09:37:47 +0200
Subject: [PATCH] Describe push constants in PipelineLayoutDesc

---
 .../src/descriptor/pipeline_layout/empty.rs   | 21 +++++++++++++++++++
 .../src/descriptor/pipeline_layout/traits.rs  |  5 ++++-
 2 files changed, 25 insertions(+), 1 deletion(-)

diff --git a/vulkano/src/descriptor/pipeline_layout/empty.rs b/vulkano/src/descriptor/pipeline_layout/empty.rs
index b78f261c5..29b341e57 100644
--- a/vulkano/src/descriptor/pipeline_layout/empty.rs
+++ b/vulkano/src/descriptor/pipeline_layout/empty.rs
@@ -12,6 +12,7 @@ use std::sync::Arc;
 
 use device::Device;
 use descriptor::descriptor::DescriptorDesc;
+use descriptor::descriptor::ShaderStages;
 use descriptor::pipeline_layout::PipelineLayoutRef;
 use descriptor::pipeline_layout::PipelineLayoutDesc;
 use descriptor::pipeline_layout::PipelineLayout;
@@ -57,6 +58,16 @@ unsafe impl PipelineLayoutDesc for EmptyPipeline {
     fn descriptor(&self, set: usize, binding: usize) -> Option<DescriptorDesc> {
         None
     }
+
+    #[inline]
+    fn num_push_constants_ranges(&self) -> usize {
+        0
+    }
+
+    #[inline]
+    fn push_constant_range(&self, num: usize) -> Option<(usize, usize, ShaderStages)> {
+        None
+    }
 }
 
 /// Description of an empty pipeline layout.
@@ -78,6 +89,16 @@ unsafe impl PipelineLayoutDesc for EmptyPipelineDesc {
     fn descriptor(&self, set: usize, binding: usize) -> Option<DescriptorDesc> {
         None
     }
+
+    #[inline]
+    fn num_push_constants_ranges(&self) -> usize {
+        0
+    }
+
+    #[inline]
+    fn push_constant_range(&self, num: usize) -> Option<(usize, usize, ShaderStages)> {
+        None
+    }
 }
 
 
diff --git a/vulkano/src/descriptor/pipeline_layout/traits.rs b/vulkano/src/descriptor/pipeline_layout/traits.rs
index 0e36eb7d0..8d944be88 100644
--- a/vulkano/src/descriptor/pipeline_layout/traits.rs
+++ b/vulkano/src/descriptor/pipeline_layout/traits.rs
@@ -8,6 +8,7 @@
 // according to those terms.
 
 use descriptor::descriptor::DescriptorDesc;
+use descriptor::descriptor::ShaderStages;
 use descriptor::descriptor_set::DescriptorSetsCollection;
 use descriptor::pipeline_layout::PipelineLayout;
 
@@ -39,7 +40,9 @@ pub unsafe trait PipelineLayoutDesc {
 
     fn descriptor(&self, set: usize, binding: usize) -> Option<DescriptorDesc>;
 
-    // TODO: describe push constants
+    fn num_push_constants_ranges(&self) -> usize;
+
+    fn push_constant_range(&self, num: usize) -> Option<(usize, usize, ShaderStages)>;
 }
 
 /// Traits that allow determining whether a pipeline layout is a superset of another one.