Added Vulkan Descriptor Sets and Samplers.

gpu/vulkan/vulkan_sampler.cc

Index: gpu/vulkan/vulkan_sampler.cc
diff --git a/gpu/vulkan/vulkan_sampler.cc b/gpu/vulkan/vulkan_sampler.cc
new file mode 100644
index 0000000000000000000000000000000000000000..fbd0d7ee9fd59c845dfdccb7d8c3dd4712aabf62
--- /dev/null
+++ b/gpu/vulkan/vulkan_sampler.cc
@@ -0,0 +1,60 @@
+// Copyright (c) 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "gpu/vulkan/vulkan_sampler.h"
+
+#include "base/logging.h"
+#include "gpu/vulkan/vulkan_device_queue.h"
+
+namespace gpu {
+
+VulkanSampler::SamplerOptions::SamplerOptions() = default;
+VulkanSampler::SamplerOptions::~SamplerOptions() = default;
+
+VulkanSampler::VulkanSampler(VulkanDeviceQueue* device_queue)
+    : device_queue_(device_queue) {}
+
+VulkanSampler::~VulkanSampler() {
+  DCHECK_EQ(static_cast<VkSampler>(VK_NULL_HANDLE), handle_);
+}
+
+bool VulkanSampler::Initialize(const SamplerOptions& options) {
+  DCHECK_EQ(static_cast<VkSampler>(VK_NULL_HANDLE), handle_);
+
+  VkSamplerCreateInfo sampler_create_info = {};
+  sampler_create_info.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO;
+  sampler_create_info.magFilter = options.mag_filter;
+  sampler_create_info.minFilter = options.min_filter;
+  sampler_create_info.mipmapMode = options.mipmap_mode;
+  sampler_create_info.addressModeU = options.address_mode_u;
+  sampler_create_info.addressModeV = options.address_mode_v;
+  sampler_create_info.addressModeW = options.address_mode_w;
+  sampler_create_info.mipLodBias = options.mip_lod_bias;
+  sampler_create_info.anisotropyEnable = options.anisotropy_enable;
+  sampler_create_info.maxAnisotropy = options.max_anisotropy;
+  sampler_create_info.compareOp = options.compare_op;
+  sampler_create_info.minLod = options.min_lod;
+  sampler_create_info.maxLod = options.max_lod;
+  sampler_create_info.borderColor = options.border_color;
+  sampler_create_info.unnormalizedCoordinates =
+      options.unnormalized_coordinates;
+
+  VkResult result = vkCreateSampler(device_queue_->GetVulkanDevice(),
+                                    &sampler_create_info, nullptr, &handle_);
+  if (VK_SUCCESS != result) {
+    DLOG(ERROR) << "vkCreateSampler() failed: " << result;
+    return false;
+  }
+
+  return true;
+}
+
+void VulkanSampler::Destroy() {
+  if (VK_NULL_HANDLE != handle_) {
+    vkDestroySampler(device_queue_->GetVulkanDevice(), handle_, nullptr);
+    handle_ = VK_NULL_HANDLE;
+  }
+}
+
+}  // namespace gpu