Add createSamplers for GEVulkanDriver

lib/graphics_engine/include/ge_vulkan_driver.hpp

@@ -11,6 +11,7 @@
 #include "../source/Irrlicht/CNullDriver.h"
 #include "SIrrCreationParameters.h"
 #include "SColor.h"
+#include <map>
 #include <string>
 #include <vector>
 
@@ -19,6 +20,11 @@ using namespace video;
 
 namespace GE
 {
+    enum GEVulkanSampler : unsigned
+    {
+        GVS_MIN,
+        GVS_NEAREST = GVS_MIN
+    };
     class GEVulkanDriver : public video::CNullDriver
     {
     public:
@@ -261,6 +267,12 @@ namespace GE
 
         virtual void enableScissorTest(const core::rect<s32>& r) {}
         virtual void disableScissorTest() {}
+        VkSampler getSampler(GEVulkanSampler s) const
+        {
+            if (m_vk.samplers.find(s) == m_vk.samplers.end())
+                return VK_NULL_HANDLE;
+            return m_vk.samplers.at(s);
+        }
 
     private:
         struct SwapChainSupportDetails
@@ -316,6 +328,7 @@ namespace GE
             std::vector<VkFence> in_flight_fences;
             VkCommandPool command_pool;
             std::vector<VkCommandBuffer> command_buffers;
+            std::map<GEVulkanSampler, VkSampler> samplers;
             VK()
             {
                 instance = VK_NULL_HANDLE;
@@ -326,6 +339,8 @@ namespace GE
             }
             ~VK()
             {
+                for (auto& sampler : samplers)
+                    vkDestroySampler(device, sampler.second, NULL);
                 if (!command_buffers.empty())
                 {
                     vkFreeCommandBuffers(device, command_pool,
@@ -383,6 +398,7 @@ namespace GE
         void createSyncObjects();
         void createCommandPool();
         void createCommandBuffers();
+        void createSamplers();
         std::string getVulkanVersionString() const;
         std::string getDriverVersionString() const;
     };

lib/graphics_engine/src/ge_vulkan_driver.cpp

@@ -488,6 +488,7 @@ GEVulkanDriver::GEVulkanDriver(const SIrrlichtCreationParameters& params,
     createSyncObjects();
     createCommandPool();
     createCommandBuffers();
+    createSamplers();
     os::Printer::log("Vulkan version", getVulkanVersionString().c_str());
     os::Printer::log("Vulkan vendor", getVendorInfo().c_str());
     os::Printer::log("Vulkan renderer", m_properties.deviceName);
@@ -978,6 +979,34 @@ void GEVulkanDriver::createCommandBuffers()
     m_vk.command_buffers = buffers;
 }   // createCommandBuffers
 
+// ----------------------------------------------------------------------------
+void GEVulkanDriver::createSamplers()
+{
+    VkSampler sampler = VK_NULL_HANDLE;
+    bool supported_anisotropy = m_features.samplerAnisotropy == VK_TRUE;
+    // GVS_NEAREST
+    VkSamplerCreateInfo sampler_info = {};
+    sampler_info.sType = VK_STRUCTURE_TYPE_SAMPLER_CREATE_INFO;
+    sampler_info.magFilter = VK_FILTER_NEAREST;
+    sampler_info.minFilter = VK_FILTER_NEAREST;
+    sampler_info.addressModeU = VK_SAMPLER_ADDRESS_MODE_REPEAT;
+    sampler_info.addressModeV = VK_SAMPLER_ADDRESS_MODE_REPEAT;
+    sampler_info.addressModeW = VK_SAMPLER_ADDRESS_MODE_REPEAT;
+    sampler_info.anisotropyEnable = supported_anisotropy;
+    sampler_info.maxAnisotropy = 1.0;
+    sampler_info.borderColor = VK_BORDER_COLOR_INT_OPAQUE_BLACK;
+    sampler_info.unnormalizedCoordinates = VK_FALSE;
+    sampler_info.compareEnable = VK_FALSE;
+    sampler_info.compareOp = VK_COMPARE_OP_ALWAYS;
+    sampler_info.mipmapMode = VK_SAMPLER_MIPMAP_MODE_NEAREST;
+    VkResult result = vkCreateSampler(m_vk.device, &sampler_info, NULL,
+        &sampler);
+
+    if (result != VK_SUCCESS)
+        throw std::runtime_error("vkCreateSampler failed for GVS_NEAREST");
+    m_vk.samplers[GVS_NEAREST] = sampler;
+}   // createSamplers
+
 // ----------------------------------------------------------------------------
 void GEVulkanDriver::OnResize(const core::dimension2d<u32>& size)
 {