void preparePipelines()
{
VkPipelineInputAssemblyStateCreateInfo inputAssemblyState =
Initializers.pipelineInputAssemblyStateCreateInfo(
VK_PRIMITIVE_TOPOLOGY_TRIANGLE_LIST,
0,
VK_FALSE);
VkPipelineRasterizationStateCreateInfo rasterizationState =
Initializers.pipelineRasterizationStateCreateInfo(
VK_POLYGON_MODE_FILL,
VK_CULL_MODE_FRONT_BIT,
VK_FRONT_FACE_CLOCKWISE,
0);
VkPipelineColorBlendAttachmentState blendAttachmentState =
Initializers.pipelineColorBlendAttachmentState(
0xf,
VK_FALSE);
VkPipelineColorBlendStateCreateInfo colorBlendState =
Initializers.pipelineColorBlendStateCreateInfo(
1,
&blendAttachmentState);
VkPipelineDepthStencilStateCreateInfo depthStencilState =
Initializers.pipelineDepthStencilStateCreateInfo(
VK_TRUE,
VK_TRUE,
VK_COMPARE_OP_LESS_OR_EQUAL);
VkPipelineViewportStateCreateInfo viewportState =
Initializers.pipelineViewportStateCreateInfo(1, 1, 0);
VkPipelineMultisampleStateCreateInfo multisampleState =
Initializers.pipelineMultisampleStateCreateInfo(
VkSampleCountFlags.Count1,
0);
FixedArray2<VkDynamicState> dynamicStateEnables = new FixedArray2<VkDynamicState>(
VK_DYNAMIC_STATE_VIEWPORT,
VK_DYNAMIC_STATE_SCISSOR);
VkPipelineDynamicStateCreateInfo dynamicState =
Initializers.pipelineDynamicStateCreateInfo(
&dynamicStateEnables.First,
dynamicStateEnables.Count,
0);
// Solid rendering pipeline
// Load shaders
FixedArray2<VkPipelineShaderStageCreateInfo> shaderStages = new FixedArray2<VkPipelineShaderStageCreateInfo>(
loadShader(getAssetPath() + "shaders/offscreen/quad.vert.spv", VK_SHADER_STAGE_VERTEX_BIT),
loadShader(getAssetPath() + "shaders/offscreen/quad.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT));
VkGraphicsPipelineCreateInfo pipelineCreateInfo =
Initializers.pipelineCreateInfo(
pipelineLayouts_textured,
renderPass,
0);
var vis = vertices_inputState;
pipelineCreateInfo.pVertexInputState = &vis;
pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
pipelineCreateInfo.pRasterizationState = &rasterizationState;
pipelineCreateInfo.pColorBlendState = &colorBlendState;
pipelineCreateInfo.pMultisampleState = &multisampleState;
pipelineCreateInfo.pViewportState = &viewportState;
pipelineCreateInfo.pDepthStencilState = &depthStencilState;
pipelineCreateInfo.pDynamicState = &dynamicState;
pipelineCreateInfo.stageCount = shaderStages.Count;
pipelineCreateInfo.pStages = &shaderStages.First;
Util.CheckResult(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, null, out pipelines_debug));
// Mirror
shaderStages.First = loadShader(getAssetPath() + "shaders/offscreen/mirror.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shaderStages.Second = loadShader(getAssetPath() + "shaders/offscreen/mirror.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
rasterizationState.cullMode = VK_CULL_MODE_NONE;
Util.CheckResult(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, null, out pipelines_mirror));
// Flip culling
rasterizationState.cullMode = VK_CULL_MODE_BACK_BIT;
// Phong shading pipelines
pipelineCreateInfo.layout = pipelineLayouts_shaded;
// Scene
shaderStages.First = loadShader(getAssetPath() + "shaders/offscreen/phong.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shaderStages.Second = loadShader(getAssetPath() + "shaders/offscreen/phong.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
Util.CheckResult(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, null, out pipelines_shaded));
// Offscreen
// Flip culling
rasterizationState.cullMode = VK_CULL_MODE_FRONT_BIT;
pipelineCreateInfo.renderPass = offscreenPass.renderPass;
Util.CheckResult(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, null, out pipelines_shadedOffscreen));
}
protected override void buildCommandBuffers()
{
VkCommandBufferBeginInfo cmdBufInfo = Initializers.commandBufferBeginInfo();
FixedArray2<VkClearValue> clearValues = new FixedArray2<VkClearValue>();
clearValues.First.color = defaultClearColor;
clearValues.Second.depthStencil = new VkClearDepthStencilValue { depth = 1.0f, stencil = 0 };
VkRenderPassBeginInfo renderPassBeginInfo = Initializers.renderPassBeginInfo();
renderPassBeginInfo.renderPass = renderPass;
renderPassBeginInfo.renderArea.offset.x = 0;
renderPassBeginInfo.renderArea.offset.y = 0;
renderPassBeginInfo.renderArea.extent.width = width;
renderPassBeginInfo.renderArea.extent.height = height;
renderPassBeginInfo.clearValueCount = 2;
renderPassBeginInfo.pClearValues = &clearValues.First;
for (int i = 0; i < drawCmdBuffers.Count; ++i)
{
// Set target frame buffer
renderPassBeginInfo.framebuffer = frameBuffers[i];
Util.CheckResult(vkBeginCommandBuffer(drawCmdBuffers[i], &cmdBufInfo));
vkCmdBeginRenderPass(drawCmdBuffers[i], &renderPassBeginInfo, VK_SUBPASS_CONTENTS_INLINE);
VkViewport viewport = Initializers.viewport((float)width, (float)height, 0.0f, 1.0f);
vkCmdSetViewport(drawCmdBuffers[i], 0, 1, &viewport);
VkRect2D scissor = Initializers.rect2D(width, height, 0, 0);
vkCmdSetScissor(drawCmdBuffers[i], 0, 1, &scissor);
ulong offsets = 0;
if (debugDisplay)
{
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts_textured, 0, 1, ref descriptorSets_debugQuad, 0, null);
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines_debug);
vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, ref models_quad.vertices.buffer, &offsets);
vkCmdBindIndexBuffer(drawCmdBuffers[i], models_quad.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(drawCmdBuffers[i], models_quad.indexCount, 1, 0, 0, 0);
}
// Scene
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines_debug);
// Reflection plane
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts_textured, 0, 1, ref descriptorSets_mirror, 0, null);
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines_mirror);
vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, ref models_plane.vertices.buffer, &offsets);
vkCmdBindIndexBuffer(drawCmdBuffers[i], models_plane.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(drawCmdBuffers[i], models_plane.indexCount, 1, 0, 0, 0);
// Model
vkCmdBindDescriptorSets(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelineLayouts_shaded, 0, 1, ref descriptorSets_model, 0, null);
vkCmdBindPipeline(drawCmdBuffers[i], VK_PIPELINE_BIND_POINT_GRAPHICS, pipelines_shaded);
vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, ref models_example.vertices.buffer, &offsets);
vkCmdBindIndexBuffer(drawCmdBuffers[i], models_example.indices.buffer, 0, VK_INDEX_TYPE_UINT32);
vkCmdDrawIndexed(drawCmdBuffers[i], models_example.indexCount, 1, 0, 0, 0);
vkCmdEndRenderPass(drawCmdBuffers[i]);
Util.CheckResult(vkEndCommandBuffer(drawCmdBuffers[i]));
}
}
void setupDescriptorSet()
{
var dsl = descriptorSetLayouts_textured;
// Mirror plane descriptor set
VkDescriptorSetAllocateInfo allocInfo =
Initializers.descriptorSetAllocateInfo(
descriptorPool,
&dsl,
1);
Util.CheckResult(vkAllocateDescriptorSets(device, &allocInfo, out descriptorSets_mirror));
var descriptor0 = uniformBuffers_vsMirror.descriptor;
var descriptor1 = offscreenPass.descriptor;
var descriptor2 = textures_colorMap.descriptor;
FixedArray3<VkWriteDescriptorSet> writeDescriptorSets = new FixedArray3<VkWriteDescriptorSet>(
// Binding 0 : Vertex shader uniform buffer
Initializers.writeDescriptorSet(
descriptorSets_mirror,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
0,
&descriptor0),
// Binding 1 : Fragment shader texture sampler
Initializers.writeDescriptorSet(
descriptorSets_mirror,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
1,
&descriptor1),
// Binding 2 : Fragment shader texture sampler
Initializers.writeDescriptorSet(
descriptorSets_mirror,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
2,
&descriptor2));
vkUpdateDescriptorSets(device, writeDescriptorSets.Count, &writeDescriptorSets.First, 0, null);
// Debug quad
Util.CheckResult(vkAllocateDescriptorSets(device, &allocInfo, out descriptorSets_debugQuad));
var descriptor3 = uniformBuffers_vsDebugQuad.descriptor;
var descriptor4 = offscreenPass.descriptor;
FixedArray2<VkWriteDescriptorSet> debugQuadWriteDescriptorSets = new FixedArray2<VkWriteDescriptorSet>(
// Binding 0 : Vertex shader uniform buffer
Initializers.writeDescriptorSet(
descriptorSets_debugQuad,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
0,
&descriptor3),
// Binding 1 : Fragment shader texture sampler
Initializers.writeDescriptorSet(
descriptorSets_debugQuad,
VK_DESCRIPTOR_TYPE_COMBINED_IMAGE_SAMPLER,
1,
&descriptor4));
vkUpdateDescriptorSets(device, debugQuadWriteDescriptorSets.Count, &debugQuadWriteDescriptorSets.First, 0, null);
var dsls_shaded = descriptorSetLayouts_shaded;
// Shaded descriptor sets
allocInfo.pSetLayouts = &dsls_shaded;
// Model
// No texture
Util.CheckResult(vkAllocateDescriptorSets(device, &allocInfo, out descriptorSets_model));
var descriptor5 = uniformBuffers_vsShared.descriptor;
VkWriteDescriptorSet modelWriteDescriptorSets =
// Binding 0 : Vertex shader uniform buffer
Initializers.writeDescriptorSet(
descriptorSets_model,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
0,
&descriptor5);
vkUpdateDescriptorSets(device, 1, &modelWriteDescriptorSets, 0, null);
// Offscreen
Util.CheckResult(vkAllocateDescriptorSets(device, &allocInfo, out descriptorSets_offscreen));
var descriptor6 = uniformBuffers_vsOffScreen.descriptor;
VkWriteDescriptorSet offScreenWriteDescriptorSets =
// Binding 0 : Vertex shader uniform buffer
Initializers.writeDescriptorSet(
descriptorSets_offscreen,
VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
0,
&descriptor6);
vkUpdateDescriptorSets(device, 1, &offScreenWriteDescriptorSets, 0, null);
}
// Setup the offscreen framebuffer for rendering the mirrored scene
// The color attachment of this framebuffer will then be used to sample from in the fragment shader of the final pass
void prepareOffscreen()
{
offscreenPass.width = FB_DIM;
offscreenPass.height = FB_DIM;
// Find a suitable depth format
VkFormat fbDepthFormat;
VkBool32 validDepthFormat = Tools.getSupportedDepthFormat(physicalDevice, &fbDepthFormat);
Debug.Assert(validDepthFormat);
// Color attachment
VkImageCreateInfo image = Initializers.imageCreateInfo();
image.imageType = VK_IMAGE_TYPE_2D;
image.format = FB_COLOR_FORMAT;
image.extent.width = (uint)offscreenPass.width;
image.extent.height = (uint)offscreenPass.height;
image.extent.depth = 1;
image.mipLevels = 1;
image.arrayLayers = 1;
image.samples = VkSampleCountFlags.Count1;
image.tiling = VK_IMAGE_TILING_OPTIMAL;
// We will sample directly from the color attachment
image.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
VkMemoryAllocateInfo memAlloc = Initializers.memoryAllocateInfo();
VkMemoryRequirements memReqs;
Util.CheckResult(vkCreateImage(device, &image, null, out offscreenPass.color.image));
vkGetImageMemoryRequirements(device, offscreenPass.color.image, &memReqs);
memAlloc.allocationSize = memReqs.size;
memAlloc.memoryTypeIndex = vulkanDevice.getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
Util.CheckResult(vkAllocateMemory(device, &memAlloc, null, out offscreenPass.color.mem));
Util.CheckResult(vkBindImageMemory(device, offscreenPass.color.image, offscreenPass.color.mem, 0));
VkImageViewCreateInfo colorImageView = Initializers.imageViewCreateInfo();
colorImageView.viewType = VK_IMAGE_VIEW_TYPE_2D;
colorImageView.format = FB_COLOR_FORMAT;
colorImageView.subresourceRange = new VkImageSubresourceRange(VkImageAspectFlags.Color);
colorImageView.image = offscreenPass.color.image;
Util.CheckResult(vkCreateImageView(device, &colorImageView, null, out offscreenPass.color.view));
// Create sampler to sample from the attachment in the fragment shader
VkSamplerCreateInfo samplerInfo = Initializers.samplerCreateInfo();
samplerInfo.magFilter = VK_FILTER_LINEAR;
samplerInfo.minFilter = VK_FILTER_LINEAR;
samplerInfo.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
samplerInfo.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
samplerInfo.addressModeV = samplerInfo.addressModeU;
samplerInfo.addressModeW = samplerInfo.addressModeU;
samplerInfo.mipLodBias = 0.0f;
samplerInfo.maxAnisotropy = 0;
samplerInfo.minLod = 0.0f;
samplerInfo.maxLod = 1.0f;
samplerInfo.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
Util.CheckResult(vkCreateSampler(device, &samplerInfo, null, out offscreenPass.sampler));
// Depth stencil attachment
image.format = fbDepthFormat;
image.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT;
Util.CheckResult(vkCreateImage(device, &image, null, out offscreenPass.depth.image));
vkGetImageMemoryRequirements(device, offscreenPass.depth.image, &memReqs);
memAlloc.allocationSize = memReqs.size;
memAlloc.memoryTypeIndex = vulkanDevice.getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
Util.CheckResult(vkAllocateMemory(device, &memAlloc, null, out offscreenPass.depth.mem));
Util.CheckResult(vkBindImageMemory(device, offscreenPass.depth.image, offscreenPass.depth.mem, 0));
VkImageViewCreateInfo depthStencilView = Initializers.imageViewCreateInfo();
depthStencilView.viewType = VK_IMAGE_VIEW_TYPE_2D;
depthStencilView.format = fbDepthFormat;
depthStencilView.flags = 0;
depthStencilView.subresourceRange = new VkImageSubresourceRange();
depthStencilView.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT | VK_IMAGE_ASPECT_STENCIL_BIT;
depthStencilView.subresourceRange.baseMipLevel = 0;
depthStencilView.subresourceRange.levelCount = 1;
depthStencilView.subresourceRange.baseArrayLayer = 0;
depthStencilView.subresourceRange.layerCount = 1;
depthStencilView.image = offscreenPass.depth.image;
Util.CheckResult(vkCreateImageView(device, &depthStencilView, null, out offscreenPass.depth.view));
// Create a separate render pass for the offscreen rendering as it may differ from the one used for scene rendering
FixedArray2<VkAttachmentDescription> attchmentDescriptions = new FixedArray2<VkAttachmentDescription>();
// Color attachment
attchmentDescriptions.First.format = FB_COLOR_FORMAT;
attchmentDescriptions.First.samples = VkSampleCountFlags.Count1;
attchmentDescriptions.First.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attchmentDescriptions.First.storeOp = VK_ATTACHMENT_STORE_OP_STORE;
attchmentDescriptions.First.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
attchmentDescriptions.First.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attchmentDescriptions.First.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
attchmentDescriptions.First.finalLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
// Depth attachment
attchmentDescriptions.Second.format = fbDepthFormat;
attchmentDescriptions.Second.samples = VkSampleCountFlags.Count1;
attchmentDescriptions.Second.loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
attchmentDescriptions.Second.storeOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attchmentDescriptions.Second.stencilLoadOp = VK_ATTACHMENT_LOAD_OP_DONT_CARE;
attchmentDescriptions.Second.stencilStoreOp = VK_ATTACHMENT_STORE_OP_DONT_CARE;
attchmentDescriptions.Second.initialLayout = VK_IMAGE_LAYOUT_UNDEFINED;
attchmentDescriptions.Second.finalLayout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL;
VkAttachmentReference colorReference = new VkAttachmentReference() { attachment = 0, layout = VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
VkAttachmentReference depthReference = new VkAttachmentReference() { attachment = 1, layout = VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL };
VkSubpassDescription subpassDescription = new VkSubpassDescription();
subpassDescription.pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
subpassDescription.colorAttachmentCount = 1;
subpassDescription.pColorAttachments = &colorReference;
subpassDescription.pDepthStencilAttachment = &depthReference;
// Use subpass dependencies for layout transitions
FixedArray2<VkSubpassDependency> dependencies = new FixedArray2<VkSubpassDependency>();
dependencies.First.srcSubpass = VK_SUBPASS_EXTERNAL;
dependencies.First.dstSubpass = 0;
dependencies.First.srcStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
dependencies.First.dstStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependencies.First.srcAccessMask = VK_ACCESS_MEMORY_READ_BIT;
dependencies.First.dstAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
dependencies.First.dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
dependencies.Second.srcSubpass = 0;
dependencies.Second.dstSubpass = VK_SUBPASS_EXTERNAL;
dependencies.Second.srcStageMask = VK_PIPELINE_STAGE_COLOR_ATTACHMENT_OUTPUT_BIT;
dependencies.Second.dstStageMask = VK_PIPELINE_STAGE_BOTTOM_OF_PIPE_BIT;
dependencies.Second.srcAccessMask = VK_ACCESS_COLOR_ATTACHMENT_READ_BIT | VK_ACCESS_COLOR_ATTACHMENT_WRITE_BIT;
dependencies.Second.dstAccessMask = VK_ACCESS_MEMORY_READ_BIT;
dependencies.Second.dependencyFlags = VK_DEPENDENCY_BY_REGION_BIT;
// Create the actual renderpass
VkRenderPassCreateInfo renderPassInfo = VkRenderPassCreateInfo.New();
renderPassInfo.attachmentCount = attchmentDescriptions.Count;
renderPassInfo.pAttachments = &attchmentDescriptions.First;
renderPassInfo.subpassCount = 1;
renderPassInfo.pSubpasses = &subpassDescription;
renderPassInfo.dependencyCount = dependencies.Count;
renderPassInfo.pDependencies = &dependencies.First;
Util.CheckResult(vkCreateRenderPass(device, &renderPassInfo, null, out offscreenPass.renderPass));
FixedArray2<VkImageView> attachments = new FixedArray2<VkImageView>(
offscreenPass.color.view,
offscreenPass.depth.view);
VkFramebufferCreateInfo fbufCreateInfo = Initializers.framebufferCreateInfo();
fbufCreateInfo.renderPass = offscreenPass.renderPass;
fbufCreateInfo.attachmentCount = 2;
fbufCreateInfo.pAttachments = &attachments.First;
fbufCreateInfo.width = (uint)offscreenPass.width;
fbufCreateInfo.height = (uint)offscreenPass.height;
fbufCreateInfo.layers = 1;
Util.CheckResult(vkCreateFramebuffer(device, &fbufCreateInfo, null, out offscreenPass.frameBuffer));
// Fill a descriptor for later use in a descriptor set
offscreenPass.descriptor.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
offscreenPass.descriptor.imageView = offscreenPass.color.view;
offscreenPass.descriptor.sampler = offscreenPass.sampler;
}
private void CreatePipelineCache()
{
VkPipelineCacheCreateInfo pipelineCacheCreateInfo = VkPipelineCacheCreateInfo.New();
Util.CheckResult(vkCreatePipelineCache(Device, ref pipelineCacheCreateInfo, null, out _pipelineCache));
}
protected virtual void SetupRenderPass()
{
using (NativeList <VkAttachmentDescription> attachments = new NativeList <VkAttachmentDescription>())
{
attachments.Count = 2;
// Color attachment
attachments[0] = new VkAttachmentDescription();
attachments[0].format = Swapchain.ColorFormat;
attachments[0].samples = VkSampleCountFlags._1;
attachments[0].loadOp = VkAttachmentLoadOp.Clear;
attachments[0].storeOp = VkAttachmentStoreOp.Store;
attachments[0].stencilLoadOp = VkAttachmentLoadOp.DontCare;
attachments[0].stencilStoreOp = VkAttachmentStoreOp.DontCare;
attachments[0].initialLayout = VkImageLayout.Undefined;
attachments[0].finalLayout = VkImageLayout.PresentSrc;
// Depth attachment
attachments[1] = new VkAttachmentDescription();
attachments[1].format = DepthFormat;
attachments[1].samples = VkSampleCountFlags._1;
attachments[1].loadOp = VkAttachmentLoadOp.Clear;
attachments[1].storeOp = VkAttachmentStoreOp.Store;
attachments[1].stencilLoadOp = VkAttachmentLoadOp.DontCare;
attachments[1].stencilStoreOp = VkAttachmentStoreOp.DontCare;
attachments[1].initialLayout = VkImageLayout.Undefined;
attachments[1].finalLayout = VkImageLayout.DepthStencilAttachmentOptimal;
VkAttachmentReference colorReference = new VkAttachmentReference();
colorReference.attachment = 0;
colorReference.layout = VkImageLayout.ColorAttachmentOptimal;
VkAttachmentReference depthReference = new VkAttachmentReference();
depthReference.attachment = 1;
depthReference.layout = VkImageLayout.DepthStencilAttachmentOptimal;
VkSubpassDescription subpassDescription = new VkSubpassDescription();
subpassDescription.pipelineBindPoint = VkPipelineBindPoint.Graphics;
subpassDescription.colorAttachmentCount = 1;
subpassDescription.pColorAttachments = &colorReference;
subpassDescription.pDepthStencilAttachment = &depthReference;
subpassDescription.inputAttachmentCount = 0;
subpassDescription.pInputAttachments = null;
subpassDescription.preserveAttachmentCount = 0;
subpassDescription.pPreserveAttachments = null;
subpassDescription.pResolveAttachments = null;
// Subpass dependencies for layout transitions
using (NativeList <VkSubpassDependency> dependencies = new NativeList <VkSubpassDependency>(2))
{
dependencies.Count = 2;
dependencies[0].srcSubpass = SubpassExternal;
dependencies[0].dstSubpass = 0;
dependencies[0].srcStageMask = VkPipelineStageFlags.BottomOfPipe;
dependencies[0].dstStageMask = VkPipelineStageFlags.ColorAttachmentOutput;
dependencies[0].srcAccessMask = VkAccessFlags.MemoryRead;
dependencies[0].dstAccessMask = (VkAccessFlags.ColorAttachmentRead | VkAccessFlags.ColorAttachmentWrite);
dependencies[0].dependencyFlags = VkDependencyFlags.ByRegion;
dependencies[1].srcSubpass = 0;
dependencies[1].dstSubpass = SubpassExternal;
dependencies[1].srcStageMask = VkPipelineStageFlags.ColorAttachmentOutput;
dependencies[1].dstStageMask = VkPipelineStageFlags.BottomOfPipe;
dependencies[1].srcAccessMask = (VkAccessFlags.ColorAttachmentRead | VkAccessFlags.ColorAttachmentWrite);
dependencies[1].dstAccessMask = VkAccessFlags.MemoryRead;
dependencies[1].dependencyFlags = VkDependencyFlags.ByRegion;
VkRenderPassCreateInfo renderPassInfo = new VkRenderPassCreateInfo();
renderPassInfo.sType = VkStructureType.RenderPassCreateInfo;
renderPassInfo.attachmentCount = attachments.Count;
renderPassInfo.pAttachments = (VkAttachmentDescription *)attachments.Data.ToPointer();
renderPassInfo.subpassCount = 1;
renderPassInfo.pSubpasses = &subpassDescription;
renderPassInfo.dependencyCount = dependencies.Count;
renderPassInfo.pDependencies = (VkSubpassDependency *)dependencies.Data;
Util.CheckResult(vkCreateRenderPass(Device, &renderPassInfo, null, out _renderPass));
}
}
}
protected void prepareFrame()
{
// Acquire the next image from the swap chaing
Util.CheckResult(Swapchain.AcquireNextImage(Semaphores[0].PresentComplete, ref currentBuffer));
}
public void InitVulkan()
{
VkResult err;
err = CreateInstance(true);
if (err != VkResult.Success)
{
throw new InvalidOperationException("Could not create Vulkan instance.");
}
if (Settings.Validation)
{
}
// Physical Device
uint gpuCount = 0;
Util.CheckResult(vkEnumeratePhysicalDevices(Instance, &gpuCount, null));
Debug.Assert(gpuCount > 0);
// Enumerate devices
IntPtr *physicalDevices = stackalloc IntPtr[(int)gpuCount];
err = vkEnumeratePhysicalDevices(Instance, &gpuCount, (VkPhysicalDevice *)physicalDevices);
if (err != VkResult.Success)
{
throw new InvalidOperationException("Could not enumerate physical devices.");
}
// GPU selection
// Select physical Device to be used for the Vulkan example
// Defaults to the first Device unless specified by command line
uint selectedDevice = 0;
// TODO: Implement arg parsing, etc.
PhysicalDevice = ((VkPhysicalDevice *)physicalDevices)[selectedDevice];
// Store properties (including limits) and features of the phyiscal Device
// So examples can check against them and see if a feature is actually supported
VkPhysicalDeviceProperties deviceProperties;
vkGetPhysicalDeviceProperties(PhysicalDevice, &deviceProperties);
DeviceProperties = deviceProperties;
VkPhysicalDeviceFeatures deviceFeatures;
vkGetPhysicalDeviceFeatures(PhysicalDevice, &deviceFeatures);
DeviceFeatures = deviceFeatures;
// Gather physical Device memory properties
VkPhysicalDeviceMemoryProperties deviceMemoryProperties;
vkGetPhysicalDeviceMemoryProperties(PhysicalDevice, &deviceMemoryProperties);
DeviceMemoryProperties = deviceMemoryProperties;
// Derived examples can override this to set actual features (based on above readings) to enable for logical device creation
getEnabledFeatures();
// Vulkan Device creation
// This is handled by a separate class that gets a logical Device representation
// and encapsulates functions related to a Device
VulkanDevice = new vksVulkanDevice(PhysicalDevice);
VkResult res = VulkanDevice.CreateLogicalDevice(EnabledFeatures, EnabledExtensions);
if (res != VkResult.Success)
{
throw new InvalidOperationException("Could not create Vulkan Device.");
}
Device = VulkanDevice.LogicalDevice;
// Get a graphics queue from the Device
VkQueue queue;
vkGetDeviceQueue(Device, VulkanDevice.QFIndices.Graphics, 0, &queue);
Queue = queue;
// Find a suitable depth format
VkFormat depthFormat;
uint validDepthFormat = Tools.getSupportedDepthFormat(PhysicalDevice, &depthFormat);
Debug.Assert(validDepthFormat == True);
DepthFormat = depthFormat;
Swapchain.Connect(Instance, PhysicalDevice, Device);
// Create synchronization objects
VkSemaphoreCreateInfo semaphoreCreateInfo = Initializers.SemaphoreCreateInfo();
// Create a semaphore used to synchronize image presentation
// Ensures that the image is displayed before we start submitting new commands to the queu
Util.CheckResult(vkCreateSemaphore(Device, &semaphoreCreateInfo, null, &GetSemaphoresPtr()->PresentComplete));
// Create a semaphore used to synchronize command submission
// Ensures that the image is not presented until all commands have been sumbitted and executed
Util.CheckResult(vkCreateSemaphore(Device, &semaphoreCreateInfo, null, &GetSemaphoresPtr()->RenderComplete));
// Create a semaphore used to synchronize command submission
// Ensures that the image is not presented until all commands for the text overlay have been sumbitted and executed
// Will be inserted after the render complete semaphore if the text overlay is enabled
Util.CheckResult(vkCreateSemaphore(Device, &semaphoreCreateInfo, null, &GetSemaphoresPtr()->TextOverlayComplete));
// Set up submit info structure
// Semaphores will stay the same during application lifetime
// Command buffer submission info is set by each example
SubmitInfo = Initializers.SubmitInfo();
SubmitInfo.pWaitDstStageMask = (VkPipelineStageFlags *)submitPipelineStages.Data;
SubmitInfo.waitSemaphoreCount = 1;
SubmitInfo.pWaitSemaphores = &GetSemaphoresPtr()->PresentComplete;
SubmitInfo.signalSemaphoreCount = 1;
SubmitInfo.pSignalSemaphores = &GetSemaphoresPtr()->RenderComplete;
}
