From 98b781527ffee193e128067b220686fc013d8e8b Mon Sep 17 00:00:00 2001
From: Austin Eng <enga@google.com>
Date: Fri, 14 Jul 2017 10:58:50 -0400
Subject: [PATCH] Add kTextureRowPitchAlignment and Align helper

---
 src/common/Constants.h | 1 +
 src/common/Math.cpp    | 6 ++++++
 src/common/Math.h      | 1 +
 3 files changed, 8 insertions(+)

diff --git a/src/common/Constants.h b/src/common/Constants.h
index 1d8f295ab8..ecd6231aa5 100644
--- a/src/common/Constants.h
+++ b/src/common/Constants.h
@@ -24,5 +24,6 @@ static constexpr uint32_t kMaxVertexAttributes = 16u;
 static constexpr uint32_t kMaxVertexInputs = 16u;
 static constexpr uint32_t kNumStages = 3;
 static constexpr uint32_t kMaxColorAttachments = 4u;
+static constexpr uint32_t kTextureRowPitchAlignment = 256u;
 
 #endif // COMMON_CONSTANTS_H_
diff --git a/src/common/Math.cpp b/src/common/Math.cpp
index ce4d41a190..da5455e57c 100644
--- a/src/common/Math.cpp
+++ b/src/common/Math.cpp
@@ -60,3 +60,9 @@ void* AlignVoidPtr(void* ptr, size_t alignment) {
     ASSERT(alignment != 0);
     return reinterpret_cast<void*>((reinterpret_cast<intptr_t>(ptr) + (alignment - 1)) & ~(alignment - 1));
 }
+
+uint32_t Align(uint32_t value, size_t alignment) {
+    ASSERT(IsPowerOfTwo(alignment));
+    ASSERT(alignment != 0);
+    return (value + (alignment - 1)) & ~(alignment - 1);
+}
diff --git a/src/common/Math.h b/src/common/Math.h
index e380dca5c9..486b8a4261 100644
--- a/src/common/Math.h
+++ b/src/common/Math.h
@@ -25,6 +25,7 @@ bool IsPowerOfTwo(size_t n);
 
 bool IsAligned(const void* ptr, size_t alignment);
 void* AlignVoidPtr(void* ptr, size_t alignment);
+uint32_t Align(uint32_t value, size_t alignment);
 
 template<typename T>
 T* AlignPtr(T* ptr, size_t alignment) {