Support for usage in memory requirements

src/Vulkan/VkBuffer.cpp

@@ -43,7 +43,22 @@ size_t Buffer::ComputeRequiredAllocationSize(const VkBufferCreateInfo* pCreateIn
 const VkMemoryRequirements Buffer::getMemoryRequirements() const
 {
 	VkMemoryRequirements memoryRequirements = {};
-	memoryRequirements.alignment = vk::REQUIRED_MEMORY_ALIGNMENT;
+	if(usage & (VK_BUFFER_USAGE_STORAGE_TEXEL_BUFFER_BIT | VK_BUFFER_USAGE_UNIFORM_TEXEL_BUFFER_BIT))
+	{
+		memoryRequirements.alignment = vk::MIN_TEXEL_BUFFER_OFFSET_ALIGNMENT;
+	}
+	else if(usage & VK_BUFFER_USAGE_STORAGE_BUFFER_BIT)
+	{
+		memoryRequirements.alignment = vk::MIN_STORAGE_BUFFER_OFFSET_ALIGNMENT;
+	}
+	else if(usage & VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT)
+	{
+		memoryRequirements.alignment = vk::MIN_UNIFORM_BUFFER_OFFSET_ALIGNMENT;
+	}
+	else
+	{
+		memoryRequirements.alignment = REQUIRED_MEMORY_ALIGNMENT;
+	}
 	memoryRequirements.memoryTypeBits = vk::MEMORY_TYPE_GENERIC_BIT;
 	memoryRequirements.size = size; // TODO: also reserve space for a header containing
 		                            // the size of the buffer (for robust buffer access)

src/Vulkan/VkConfig.h

@@ -38,6 +38,9 @@ enum
 enum
 {
 	REQUIRED_MEMORY_ALIGNMENT = 8, // For 64 bit formats on ARM64
+	MIN_TEXEL_BUFFER_OFFSET_ALIGNMENT = 256,
+	MIN_UNIFORM_BUFFER_OFFSET_ALIGNMENT = 256,
+	MIN_STORAGE_BUFFER_OFFSET_ALIGNMENT = 256,
 	MEMORY_TYPE_GENERIC_BIT = 0x1, // Generic system memory.
 };
 

src/Vulkan/VkPhysicalDevice.cpp

@@ -204,9 +204,9 @@ const VkPhysicalDeviceLimits& PhysicalDevice::getLimits() const
 		{ -8192, 8191 }, // viewportBoundsRange[2]
 		0, // viewportSubPixelBits
 		64, // minMemoryMapAlignment
-		256, // minTexelBufferOffsetAlignment
-		256, // minUniformBufferOffsetAlignment
-		256, // minStorageBufferOffsetAlignment
+		vk::MIN_TEXEL_BUFFER_OFFSET_ALIGNMENT, // minTexelBufferOffsetAlignment
+		vk::MIN_UNIFORM_BUFFER_OFFSET_ALIGNMENT, // minUniformBufferOffsetAlignment
+		vk::MIN_STORAGE_BUFFER_OFFSET_ALIGNMENT, // minStorageBufferOffsetAlignment
 		-8, // minTexelOffset
 		7, // maxTexelOffset
 		-8, // minTexelGatherOffset