add msaa

src/vulkanrenderer.cpp

@@ -53,6 +53,10 @@ VulkanRenderer::VulkanRenderer()
     , m_fontTextureMemory(VK_NULL_HANDLE)
     , m_fontTextureView(VK_NULL_HANDLE)
     , m_fontSampler(VK_NULL_HANDLE)
+    , m_msaaImage(VK_NULL_HANDLE)
+    , m_msaaImageMemory(VK_NULL_HANDLE)
+    , m_msaaImageView(VK_NULL_HANDLE)
+    , m_msaaSamples(VK_SAMPLE_COUNT_1_BIT)
     , m_width(0)
     , m_height(0)
     , m_swapchainFormat(0)
@@ -80,6 +84,18 @@ bool VulkanRenderer::initialize(VkDevice device, VkPhysicalDevice physicalDevice
     m_height = height;
     m_transferCommandPool = VK_NULL_HANDLE;
 
+    // Determine best MSAA sample count
+    m_msaaSamples = getMaxUsableSampleCount();
+    std::cout << "Using MSAA with " << m_msaaSamples << " samples" << std::endl;
+
+    // Create MSAA resources if MSAA is enabled
+    if (m_msaaSamples > VK_SAMPLE_COUNT_1_BIT) {
+        if (!createMSAAResources()) {
+            logError("Failed to create MSAA resources, falling back to no MSAA");
+            m_msaaSamples = VK_SAMPLE_COUNT_1_BIT;
+        }
+    }
+
     if (!createRenderPass()) {
         logError("Failed to create render pass");
         return false;
@@ -201,8 +217,131 @@ bool VulkanRenderer::initialize(VkDevice device, VkPhysicalDevice physicalDevice
     return true;
 }
 
+uint32_t VulkanRenderer::getMaxUsableSampleCount()
+{
+    VkPhysicalDeviceProperties physicalDeviceProperties;
+    vkGetPhysicalDeviceProperties(m_physicalDevice, &physicalDeviceProperties);
+
+    VkSampleCountFlags counts = physicalDeviceProperties.limits.framebufferColorSampleCounts &
+                                physicalDeviceProperties.limits.framebufferDepthSampleCounts;
+
+    // Try to use 4x MSAA as a good balance between quality and performance
+    if (counts & VK_SAMPLE_COUNT_8_BIT) { return VK_SAMPLE_COUNT_8_BIT; }
+    if (counts & VK_SAMPLE_COUNT_4_BIT) { return VK_SAMPLE_COUNT_4_BIT; }
+    if (counts & VK_SAMPLE_COUNT_2_BIT) { return VK_SAMPLE_COUNT_2_BIT; }
+
+    return VK_SAMPLE_COUNT_1_BIT;
+}
+
+bool VulkanRenderer::createMSAAResources()
+{
+    std::cout << "Creating MSAA resources: " << m_width << "x" << m_height
+              << " with " << m_msaaSamples << " samples" << std::endl;
+
+    VkImageCreateInfo imageInfo = {};
+    imageInfo.sType = VK_STRUCTURE_TYPE_IMAGE_CREATE_INFO;
+    imageInfo.imageType = VK_IMAGE_TYPE_2D;
+    imageInfo.extent.width = m_width;
+    imageInfo.extent.height = m_height;
+    imageInfo.extent.depth = 1;
+    imageInfo.mipLevels = 1;
+    imageInfo.arrayLayers = 1;
+    imageInfo.format = static_cast<VkFormat>(m_swapchainFormat);
+    imageInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
+    imageInfo.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
+    imageInfo.usage = VK_IMAGE_USAGE_TRANSIENT_ATTACHMENT_BIT | VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
+    imageInfo.samples = static_cast<VkSampleCountFlagBits>(m_msaaSamples);
+    imageInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
+
+    VkResult result = vkCreateImage(m_device, &imageInfo, nullptr, &m_msaaImage);
+    if (result != VK_SUCCESS) {
+        std::cout << "Failed to create MSAA image, error: " << result << std::endl;
+        logError("Failed to create MSAA image");
+        return false;
+    }
+    std::cout << "MSAA image created successfully" << std::endl;
+
+    VkMemoryRequirements memRequirements;
+    vkGetImageMemoryRequirements(m_device, m_msaaImage, &memRequirements);
+    std::cout << "MSAA memory requirements: size=" << memRequirements.size
+              << " alignment=" << memRequirements.alignment << std::endl;
+
+    VkMemoryAllocateInfo allocInfo = {};
+    allocInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
+    allocInfo.allocationSize = memRequirements.size;
+    allocInfo.memoryTypeIndex = findMemoryType(memRequirements.memoryTypeBits,
+                                               VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
+
+    result = vkAllocateMemory(m_device, &allocInfo, nullptr, &m_msaaImageMemory);
+    if (result != VK_SUCCESS) {
+        std::cout << "Failed to allocate MSAA image memory, error: " << result << std::endl;
+        logError("Failed to allocate MSAA image memory");
+        vkDestroyImage(m_device, m_msaaImage, nullptr);
+        m_msaaImage = VK_NULL_HANDLE;
+        return false;
+    }
+    std::cout << "MSAA memory allocated successfully" << std::endl;
+
+    result = vkBindImageMemory(m_device, m_msaaImage, m_msaaImageMemory, 0);
+    if (result != VK_SUCCESS) {
+        std::cout << "Failed to bind MSAA image memory, error: " << result << std::endl;
+        logError("Failed to bind MSAA image memory");
+        vkFreeMemory(m_device, m_msaaImageMemory, nullptr);
+        vkDestroyImage(m_device, m_msaaImage, nullptr);
+        m_msaaImage = VK_NULL_HANDLE;
+        m_msaaImageMemory = VK_NULL_HANDLE;
+        return false;
+    }
+    std::cout << "MSAA memory bound successfully" << std::endl;
+
+    // Create image view
+    VkImageViewCreateInfo viewInfo = {};
+    viewInfo.sType = VK_STRUCTURE_TYPE_IMAGE_VIEW_CREATE_INFO;
+    viewInfo.image = m_msaaImage;
+    viewInfo.viewType = VK_IMAGE_VIEW_TYPE_2D;
+    viewInfo.format = static_cast<VkFormat>(m_swapchainFormat);
+    viewInfo.subresourceRange.aspectMask = VK_IMAGE_ASPECT_COLOR_BIT;
+    viewInfo.subresourceRange.baseMipLevel = 0;
+    viewInfo.subresourceRange.levelCount = 1;
+    viewInfo.subresourceRange.baseArrayLayer = 0;
+    viewInfo.subresourceRange.layerCount = 1;
+
+    result = vkCreateImageView(m_device, &viewInfo, nullptr, &m_msaaImageView);
+    if (result != VK_SUCCESS) {
+        std::cout << "Failed to create MSAA image view, error: " << result << std::endl;
+        logError("Failed to create MSAA image view");
+        vkFreeMemory(m_device, m_msaaImageMemory, nullptr);
+        vkDestroyImage(m_device, m_msaaImage, nullptr);
+        m_msaaImage = VK_NULL_HANDLE;
+        m_msaaImageMemory = VK_NULL_HANDLE;
+        return false;
+    }
+    std::cout << "MSAA image view created successfully" << std::endl;
+    std::cout << "MSAA resources created: image=" << m_msaaImage
+              << " view=" << m_msaaImageView << std::endl;
+
+    return true;
+}
+
+void VulkanRenderer::cleanupMSAAResources()
+{
+    if (m_msaaImageView != VK_NULL_HANDLE) {
+        vkDestroyImageView(m_device, m_msaaImageView, nullptr);
+        m_msaaImageView = VK_NULL_HANDLE;
+    }
+    if (m_msaaImage != VK_NULL_HANDLE) {
+        vkDestroyImage(m_device, m_msaaImage, nullptr);
+        m_msaaImage = VK_NULL_HANDLE;
+    }
+    if (m_msaaImageMemory != VK_NULL_HANDLE) {
+        vkFreeMemory(m_device, m_msaaImageMemory, nullptr);
+        m_msaaImageMemory = VK_NULL_HANDLE;
+    }
+}
+
 void VulkanRenderer::cleanup()
 {
+    cleanupMSAAResources();
     if (!m_device) return;
 
     // Clean up buffers
@@ -295,6 +434,15 @@ bool VulkanRenderer::resize(uint32_t width, uint32_t height)
     }
     m_framebuffers.clear();
 
+    // Recreate MSAA resources if MSAA is enabled
+    if (m_msaaSamples > VK_SAMPLE_COUNT_1_BIT) {
+        cleanupMSAAResources();
+        if (!createMSAAResources()) {
+            logError("Failed to recreate MSAA resources during resize");
+            return false;
+        }
+    }
+
     return createFramebuffers();
 }
 
@@ -396,52 +544,64 @@ void VulkanRenderer::recordCommandBuffer(VkCommandBuffer commandBuffer,
         return;
     }
 
-    // Create or get framebuffer for this image view
-    if (m_framebuffers.empty() || imageIndex >= m_framebuffers.size()) {
-        // We need to create framebuffers on-the-fly
-        m_imageViews.clear();
-        m_imageViews.push_back(imageView);
-        createFramebuffers();
-    } else if (imageIndex < m_imageViews.size() && m_imageViews[imageIndex] != imageView) {
-        // Update image view if changed
-        if (m_framebuffers[imageIndex]) {
-            vkDestroyFramebuffer(m_device, m_framebuffers[imageIndex], nullptr);
-        }
-        m_imageViews[imageIndex] = imageView;
-
-        VkFramebufferCreateInfo fbInfo = {};
-        fbInfo.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
-        fbInfo.renderPass = m_renderPass;
-        fbInfo.attachmentCount = 1;
-        fbInfo.pAttachments = &imageView;
-        fbInfo.width = m_width;
-        fbInfo.height = m_height;
-        fbInfo.layers = 1;
-        vkCreateFramebuffer(m_device, &fbInfo, nullptr, &m_framebuffers[imageIndex]);
-    }
-
     // Make sure we have enough image views
     while (m_imageViews.size() <= imageIndex) {
         m_imageViews.push_back(VK_NULL_HANDLE);
     }
-    m_imageViews[imageIndex] = imageView;
 
     // Make sure we have enough framebuffers
     while (m_framebuffers.size() <= imageIndex) {
         m_framebuffers.push_back(VK_NULL_HANDLE);
     }
 
-    // Create framebuffer if needed
+    // Check if we need to create or recreate framebuffer
+    bool needsRecreate = false;
     if (m_framebuffers[imageIndex] == VK_NULL_HANDLE) {
+        needsRecreate = true;
+    } else if (m_imageViews[imageIndex] != imageView) {
+        // Image view changed - destroy old framebuffer
+        vkDestroyFramebuffer(m_device, m_framebuffers[imageIndex], nullptr);
+        m_framebuffers[imageIndex] = VK_NULL_HANDLE;
+        needsRecreate = true;
+    }
+
+    // Update image view
+    m_imageViews[imageIndex] = imageView;
+
+    // Create framebuffer if needed
+    if (needsRecreate) {
         VkFramebufferCreateInfo fbInfo = {};
         fbInfo.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
         fbInfo.renderPass = m_renderPass;
-        fbInfo.attachmentCount = 1;
-        fbInfo.pAttachments = &imageView;
         fbInfo.width = m_width;
         fbInfo.height = m_height;
         fbInfo.layers = 1;
-        vkCreateFramebuffer(m_device, &fbInfo, nullptr, &m_framebuffers[imageIndex]);
+
+        if (m_msaaSamples > VK_SAMPLE_COUNT_1_BIT) {
+            // MSAA enabled: attach MSAA image and resolve image
+            VkImageView attachments[2] = {
+                m_msaaImageView,
+                imageView
+            };
+            fbInfo.attachmentCount = 2;
+            fbInfo.pAttachments = attachments;
+
+            static int fbCreateCount = 0;
+            std::cout << "Creating framebuffer " << imageIndex << " (#" << fbCreateCount++
+                      << ") with MSAA (msaa_view=" << m_msaaImageView
+                      << ", resolve=" << imageView << ")" << std::endl;
+        } else {
+            // No MSAA: single attachment
+            fbInfo.attachmentCount = 1;
+            fbInfo.pAttachments = &imageView;
+        }
+
+        VkResult result = vkCreateFramebuffer(m_device, &fbInfo, nullptr, &m_framebuffers[imageIndex]);
+        if (result != VK_SUCCESS) {
+            std::cout << "ERROR: Failed to create framebuffer " << imageIndex
+                      << ", error code: " << result << std::endl;
+            return;
+        }
     }
 
     // Begin render pass
@@ -507,6 +667,67 @@ VkFramebuffer VulkanRenderer::getFramebuffer(uint32_t index) const
 
 bool VulkanRenderer::createRenderPass()
 {
+    std::vector<VkAttachmentDescription> attachments;
+
+    if (m_msaaSamples > VK_SAMPLE_COUNT_1_BIT) {
+        // MSAA color attachment
+        VkAttachmentDescription colorAttachment = {};
+        colorAttachment.format = static_cast<VkFormat>(m_swapchainFormat);
+        colorAttachment.samples = static_cast<VkSampleCountFlagBits>(m_msaaSamples);
+        colorAttachment.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
+        colorAttachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
+        colorAttachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
+        colorAttachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
+        colorAttachment.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
+        colorAttachment.finalLayout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+        attachments.push_back(colorAttachment);
+
+        // Resolve attachment (for presenting)
+        VkAttachmentDescription resolveAttachment = {};
+        resolveAttachment.format = static_cast<VkFormat>(m_swapchainFormat);
+        resolveAttachment.samples = VK_SAMPLE_COUNT_1_BIT;
+        resolveAttachment.loadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
+        resolveAttachment.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
+        resolveAttachment.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
+        resolveAttachment.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
+        resolveAttachment.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
+        resolveAttachment.finalLayout = VK_IMAGE_LAYOUT_PRESENT_SRC_KHR;
+        attachments.push_back(resolveAttachment);
+
+        VkAttachmentReference colorAttachmentRef = {};
+        colorAttachmentRef.attachment = 0;
+        colorAttachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+
+        VkAttachmentReference resolveAttachmentRef = {};
+        resolveAttachmentRef.attachment = 1;
+        resolveAttachmentRef.layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL;
+
+        VkSubpassDescription subpass = {};
+        subpass.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
+        subpass.colorAttachmentCount = 1;
+        subpass.pColorAttachments = &colorAttachmentRef;
+        subpass.pResolveAttachments = &resolveAttachmentRef;
+
+        VkSubpassDependency dependency = {};
+        dependency.srcSubpass = VK_SUBPASS_EXTERNAL;
+        dependency.dstSubpass = 0;
+        dependency.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
+        dependency.srcAccessMask = 0;
+        dependency.dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
+        dependency.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
+
+        VkRenderPassCreateInfo renderPassInfo = {};
+        renderPassInfo.sType = VK_STRUCTURE_TYPE_RENDER_PASS_CREATE_INFO;
+        renderPassInfo.attachmentCount = static_cast<uint32_t>(attachments.size());
+        renderPassInfo.pAttachments = attachments.data();
+        renderPassInfo.subpassCount = 1;
+        renderPassInfo.pSubpasses = &subpass;
+        renderPassInfo.dependencyCount = 1;
+        renderPassInfo.pDependencies = &dependency;
+
+        return vkCreateRenderPass(m_device, &renderPassInfo, nullptr, &m_renderPass) == VK_SUCCESS;
+    } else {
+        // No MSAA - single color attachment
         VkAttachmentDescription colorAttachment = {};
         colorAttachment.format = static_cast<VkFormat>(m_swapchainFormat);
         colorAttachment.samples = VK_SAMPLE_COUNT_1_BIT;
@@ -545,6 +766,7 @@ bool VulkanRenderer::createRenderPass()
 
         return vkCreateRenderPass(m_device, &renderPassInfo, nullptr, &m_renderPass) == VK_SUCCESS;
     }
+}
 
 bool VulkanRenderer::createFramebuffers()
 {
@@ -554,13 +776,33 @@ bool VulkanRenderer::createFramebuffers()
         VkFramebufferCreateInfo framebufferInfo = {};
         framebufferInfo.sType = VK_STRUCTURE_TYPE_FRAMEBUFFER_CREATE_INFO;
         framebufferInfo.renderPass = m_renderPass;
-        framebufferInfo.attachmentCount = 1;
-        framebufferInfo.pAttachments = &m_imageViews[i];
         framebufferInfo.width = m_width;
         framebufferInfo.height = m_height;
         framebufferInfo.layers = 1;
 
-        if (vkCreateFramebuffer(m_device, &framebufferInfo, nullptr, &m_framebuffers[i]) != VK_SUCCESS) {
+        if (m_msaaSamples > VK_SAMPLE_COUNT_1_BIT) {
+            // MSAA enabled: attach MSAA image and resolve image
+            if (m_msaaImageView == VK_NULL_HANDLE) {
+                std::cout << "ERROR: MSAA image view is null when creating framebuffer " << i << std::endl;
+                return false;
+            }
+            VkImageView attachments[2] = {
+                m_msaaImageView,
+                m_imageViews[i]
+            };
+            framebufferInfo.attachmentCount = 2;
+            framebufferInfo.pAttachments = attachments;
+            std::cout << "Creating framebuffer " << i << " with MSAA (view=" << m_msaaImageView
+                      << ", resolve=" << m_imageViews[i] << ")" << std::endl;
+        } else {
+            // No MSAA: single attachment
+            framebufferInfo.attachmentCount = 1;
+            framebufferInfo.pAttachments = &m_imageViews[i];
+        }
+
+        VkResult result = vkCreateFramebuffer(m_device, &framebufferInfo, nullptr, &m_framebuffers[i]);
+        if (result != VK_SUCCESS) {
+            std::cout << "Failed to create framebuffer " << i << ", error: " << result << std::endl;
             return false;
         }
     }
@@ -694,7 +936,7 @@ bool VulkanRenderer::createBackgroundPipeline()
     VkPipelineMultisampleStateCreateInfo multisampling = {};
     multisampling.sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
     multisampling.sampleShadingEnable = VK_FALSE;
-    multisampling.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
+    multisampling.rasterizationSamples = static_cast<VkSampleCountFlagBits>(m_msaaSamples);
 
     // Color blending
     VkPipelineColorBlendAttachmentState colorBlendAttachment = {};
@@ -860,7 +1102,7 @@ bool VulkanRenderer::createGeometryPipeline()
     VkPipelineMultisampleStateCreateInfo multisampling = {};
     multisampling.sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
     multisampling.sampleShadingEnable = VK_FALSE;
-    multisampling.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
+    multisampling.rasterizationSamples = static_cast<VkSampleCountFlagBits>(m_msaaSamples);
 
     // Enable alpha blending
     VkPipelineColorBlendAttachmentState colorBlendAttachment = {};
@@ -1021,7 +1263,7 @@ bool VulkanRenderer::createLinePipeline()
     VkPipelineMultisampleStateCreateInfo multisampling = {};
     multisampling.sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
     multisampling.sampleShadingEnable = VK_FALSE;
-    multisampling.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
+    multisampling.rasterizationSamples = static_cast<VkSampleCountFlagBits>(m_msaaSamples);
 
     // Enable alpha blending
     VkPipelineColorBlendAttachmentState colorBlendAttachment = {};
@@ -1200,7 +1442,7 @@ bool VulkanRenderer::createTextPipeline()
     VkPipelineMultisampleStateCreateInfo multisampling = {};
     multisampling.sType = VK_STRUCTURE_TYPE_PIPELINE_MULTISAMPLE_STATE_CREATE_INFO;
     multisampling.sampleShadingEnable = VK_FALSE;
-    multisampling.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
+    multisampling.rasterizationSamples = static_cast<VkSampleCountFlagBits>(m_msaaSamples);
 
     // Enable alpha blending for text
     VkPipelineColorBlendAttachmentState colorBlendAttachment = {};
@@ -2382,7 +2624,7 @@ void VulkanRenderer::drawText(VkCommandBuffer commandBuffer, int frameCount,
         // Lock info (if available)
         if (!lockInfo.empty()) {
             std::string lockTitle = "Last Lock Info:";
-            generateTextQuads(lockTitle, 20.0f * scaleX, 210.0f * scaleY, 0.3f, magenta, vertices, indices);
+            generateTextQuads(lockTitle, 20.0f * scaleX, 220.0f * scaleY, 0.4f, magenta, vertices, indices);
 
             // Parse lock info (assuming format from lockInfo string)
             size_t pos = 0;
@@ -2391,13 +2633,13 @@ void VulkanRenderer::drawText(VkCommandBuffer commandBuffer, int frameCount,
             while ((pos = info.find('\n')) != std::string::npos) {
                 std::string token = info.substr(0, pos);
                 if (!token.empty()) {
-                    generateTextQuads(token, 20.0f * scaleX, (230.0f + line * 20.0f) * scaleY, 0.2f, magenta, vertices, indices);
+                    generateTextQuads(token, 20.0f * scaleX, (240.0f + line * 20.0f) * scaleY, 0.3f, magenta, vertices, indices);
                     line++;
                 }
                 info.erase(0, pos + 1);
             }
             if (!info.empty()) {
-                generateTextQuads(info, 20.0f * scaleX, (230.0f + line * 20.0f) * scaleY, 0.2f, magenta, vertices, indices);
+                generateTextQuads(info, 20.0f * scaleX, (240.0f + line * 20.0f) * scaleY, 0.3f, magenta, vertices, indices);
             }
         }
 

src/vulkanrenderer.h

@@ -233,6 +233,21 @@ private:
      */
     uint32_t findMemoryType(uint32_t typeFilter, uint32_t properties);
 
+    /**
+     * @brief 获取最大可用的采样数
+     */
+    uint32_t getMaxUsableSampleCount();
+
+    /**
+     * @brief 创建多重采样图像资源
+     */
+    bool createMSAAResources();
+
+    /**
+     * @brief 清理多重采样资源
+     */
+    void cleanupMSAAResources();
+
     /**
      * @brief 初始化文本渲染系统
      */
@@ -354,6 +369,12 @@ private:
     VkSampler m_fontSampler;
     std::map<char, CharInfo> m_charInfoMap;
 
+    // MSAA 资源
+    VkImage m_msaaImage;
+    VkDeviceMemory m_msaaImageMemory;
+    VkImageView m_msaaImageView;
+    uint32_t m_msaaSamples;  // VkSampleCountFlagBits
+
     // 渲染目标尺寸
     uint32_t m_width;
     uint32_t m_height;