Removed offscreen texture (and copy), sample from depth attachment directly instead
This commit is contained in:
saschawillems
parent
e7b79bec31
commit
82a57c8ce9
1 changed files with 132 additions and 238 deletions
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@ -1,9 +1,5 @@
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/*
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* Vulkan Example - Offscreen rendering using a separate framebuffer
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*
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* p - Toggle light source animation
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* l - Toggle between scene and light's POV
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* s - Toggle shadowmap display
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* Vulkan Example - Shadow mapping for directional light sources
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*
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* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
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*
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@ -31,12 +27,16 @@
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// 16 bits of depth is enough for such a small scene
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#define DEPTH_FORMAT VK_FORMAT_D16_UNORM
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// Texture properties
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#define TEX_DIM 2048
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#define TEX_FILTER VK_FILTER_LINEAR
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// Shadowmap properties
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#if defined(__ANDROID__)
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#define SHADOWMAP_DIM 1024
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#else
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#define SHADOWMAP_DIM 2048
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#endif
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#define SHADOWMAP_FILTER VK_FILTER_LINEAR
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// Offscreen frame buffer properties
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#define FB_DIM TEX_DIM
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#define FB_DIM SHADOWMAP_DIM
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#define FB_COLOR_FORMAT VK_FORMAT_R8G8B8A8_UNORM
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// Vertex layout for this example
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@ -59,6 +59,7 @@ public:
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float zNear = 1.0f;
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float zFar = 96.0f;
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// Depth bias (and slope) are used to avoid shadowing artefacts
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// Constant depth bias factor (always applied)
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float depthBiasConstant = 1.25f;
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// Slope depth bias factor, applied depending on polygon's slope
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@ -78,10 +79,11 @@ public:
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std::vector<VkVertexInputAttributeDescription> attributeDescriptions;
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} vertices;
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vkTools::UniformData uniformDataVS, uniformDataOffscreenVS;
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vkTools::UniformData uniformDataVS;
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struct {
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vkTools::UniformData scene;
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vkTools::UniformData offscreen;
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} uniformData;
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struct {
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@ -131,7 +133,7 @@ public:
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VkFramebuffer frameBuffer;
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FrameBufferAttachment color, depth;
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VkRenderPass renderPass;
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vkTools::VulkanTexture textureTarget;
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VkSampler depthSampler;
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} offScreenFrameBuf;
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VkCommandBuffer offScreenCmdBuffer = VK_NULL_HANDLE;
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@ -143,6 +145,7 @@ public:
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{
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zoom = -20.0f;
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rotation = { -15.0f, -390.0f, 0.0f };
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enableTextOverlay = true;
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title = "Vulkan Example - Projected shadow mapping";
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timerSpeed *= 0.5f;
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}
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@ -152,9 +155,6 @@ public:
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// Clean up used Vulkan resources
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// Note : Inherited destructor cleans up resources stored in base class
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// Texture target
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textureLoader->destroyTexture(offScreenFrameBuf.textureTarget);
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// Frame buffer
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// Color attachment
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@ -186,91 +186,18 @@ public:
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// Uniform buffers
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vkTools::destroyUniformData(device, &uniformDataVS);
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vkTools::destroyUniformData(device, &uniformDataOffscreenVS);
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vkTools::destroyUniformData(device, &uniformData.offscreen);
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vkTools::destroyUniformData(device, &uniformData.scene);
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vkFreeCommandBuffers(device, cmdPool, 1, &offScreenCmdBuffer);
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vkDestroySemaphore(device, offscreenSemaphore, nullptr);
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}
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// Preapre an empty texture as the blit target from
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// the offscreen framebuffer
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void prepareTextureTarget(uint32_t width, uint32_t height, VkFormat format)
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{
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// Get device properites for the requested texture format
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VkFormatProperties formatProperties;
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vkGetPhysicalDeviceFormatProperties(physicalDevice, format, &formatProperties);
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// Check if format is supported for optimal tiling
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assert(formatProperties.optimalTilingFeatures & VK_FORMAT_FEATURE_DEPTH_STENCIL_ATTACHMENT_BIT);
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// Prepare blit target texture
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offScreenFrameBuf.textureTarget.width = width;
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offScreenFrameBuf.textureTarget.height = height;
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VkImageCreateInfo imageCreateInfo = vkTools::initializers::imageCreateInfo();
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imageCreateInfo.imageType = VK_IMAGE_TYPE_2D;
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imageCreateInfo.format = format;
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imageCreateInfo.extent = { width, height, 1 };
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imageCreateInfo.mipLevels = 1;
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imageCreateInfo.arrayLayers = 1;
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imageCreateInfo.samples = VK_SAMPLE_COUNT_1_BIT;
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imageCreateInfo.tiling = VK_IMAGE_TILING_OPTIMAL;
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imageCreateInfo.usage = VK_IMAGE_USAGE_SAMPLED_BIT | VK_IMAGE_USAGE_TRANSFER_DST_BIT;
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imageCreateInfo.initialLayout = VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL;
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imageCreateInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
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imageCreateInfo.initialLayout = VK_IMAGE_LAYOUT_PREINITIALIZED;
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VkMemoryAllocateInfo memAllocInfo = vkTools::initializers::memoryAllocateInfo();
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VkMemoryRequirements memReqs;
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VK_CHECK_RESULT(vkCreateImage(device, &imageCreateInfo, nullptr, &offScreenFrameBuf.textureTarget.image));
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vkGetImageMemoryRequirements(device, offScreenFrameBuf.textureTarget.image, &memReqs);
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memAllocInfo.allocationSize = memReqs.size;
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memAllocInfo.memoryTypeIndex = getMemoryType(memReqs.memoryTypeBits, VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT);
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VK_CHECK_RESULT(vkAllocateMemory(device, &memAllocInfo, nullptr, &offScreenFrameBuf.textureTarget.deviceMemory));
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VK_CHECK_RESULT(vkBindImageMemory(device, offScreenFrameBuf.textureTarget.image, offScreenFrameBuf.textureTarget.deviceMemory, 0));
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VkCommandBuffer layoutCmd = VulkanExampleBase::createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, true);
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offScreenFrameBuf.textureTarget.imageLayout = VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL;
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vkTools::setImageLayout(
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layoutCmd,
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offScreenFrameBuf.textureTarget.image,
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VK_IMAGE_ASPECT_DEPTH_BIT,
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VK_IMAGE_LAYOUT_PREINITIALIZED,
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offScreenFrameBuf.textureTarget.imageLayout);
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VulkanExampleBase::flushCommandBuffer(layoutCmd, queue, true);
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// Create sampler
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VkSamplerCreateInfo sampler = vkTools::initializers::samplerCreateInfo();
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sampler.magFilter = TEX_FILTER;
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sampler.minFilter = TEX_FILTER;
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sampler.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
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sampler.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
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sampler.addressModeV = sampler.addressModeU;
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sampler.addressModeW = sampler.addressModeU;
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sampler.mipLodBias = 0.0f;
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sampler.maxAnisotropy = 0;
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sampler.minLod = 0.0f;
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sampler.maxLod = 1.0f;
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sampler.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
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VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &offScreenFrameBuf.textureTarget.sampler));
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// Create image view
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VkImageViewCreateInfo view = vkTools::initializers::imageViewCreateInfo();
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view.viewType = VK_IMAGE_VIEW_TYPE_2D;
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view.format = format;
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view.components = { VK_COMPONENT_SWIZZLE_R, VK_COMPONENT_SWIZZLE_G, VK_COMPONENT_SWIZZLE_B, VK_COMPONENT_SWIZZLE_A };
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view.subresourceRange = { VK_IMAGE_ASPECT_DEPTH_BIT, 0, 1, 0, 1 };
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view.image = offScreenFrameBuf.textureTarget.image;
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VK_CHECK_RESULT(vkCreateImageView(device, &view, nullptr, &offScreenFrameBuf.textureTarget.view));
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}
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// Set up a separate render pass for the offscreen frame buffer
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// This is necessary as the offscreen frame buffer attachments
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// use formats different to the ones from the visible frame buffer
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// and at least the depth one may not be compatible
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void setupOffScreenRenderPass()
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void prepareOffscreenRenderpass()
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{
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VkAttachmentDescription attDesc[2];
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attDesc[0].format = FB_COLOR_FORMAT;
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@ -333,13 +260,13 @@ public:
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image.format = fbColorFormat;
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image.extent.width = offScreenFrameBuf.width;
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image.extent.height = offScreenFrameBuf.height;
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image.extent.depth = 1;
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image.mipLevels = 1;
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image.arrayLayers = 1;
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image.samples = VK_SAMPLE_COUNT_1_BIT;
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image.tiling = VK_IMAGE_TILING_OPTIMAL;
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// Image of the framebuffer is blit source
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image.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
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image.flags = 0;
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image.usage = VK_IMAGE_USAGE_COLOR_ATTACHMENT_BIT;
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VkMemoryAllocateInfo memAlloc = vkTools::initializers::memoryAllocateInfo();
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VkMemoryRequirements memReqs;
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@ -376,12 +303,12 @@ public:
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// Depth stencil attachment
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image.format = DEPTH_FORMAT;
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image.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT | VK_IMAGE_USAGE_TRANSFER_SRC_BIT;
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// We will sample directly from the depth attachment for the shadow mapping
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image.usage = VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT | VK_IMAGE_USAGE_SAMPLED_BIT;
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VkImageViewCreateInfo depthStencilView = vkTools::initializers::imageViewCreateInfo();
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depthStencilView.viewType = VK_IMAGE_VIEW_TYPE_2D;
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depthStencilView.format = DEPTH_FORMAT;
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depthStencilView.flags = 0;
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depthStencilView.subresourceRange = {};
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depthStencilView.subresourceRange.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
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depthStencilView.subresourceRange.baseMipLevel = 0;
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@ -396,6 +323,8 @@ public:
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VK_CHECK_RESULT(vkAllocateMemory(device, &memAlloc, nullptr, &offScreenFrameBuf.depth.mem));
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VK_CHECK_RESULT(vkBindImageMemory(device, offScreenFrameBuf.depth.image, offScreenFrameBuf.depth.mem, 0));
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// Set the initial layout to shader read instead of attachment
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// This is done as teh render loop does the actualy image layout transitions
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vkTools::setImageLayout(
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layoutCmd,
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offScreenFrameBuf.depth.image,
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@ -408,11 +337,27 @@ public:
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depthStencilView.image = offScreenFrameBuf.depth.image;
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VK_CHECK_RESULT(vkCreateImageView(device, &depthStencilView, nullptr, &offScreenFrameBuf.depth.view));
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// Create sampler used to sample from depth attachment
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// in shadowing fragment shader
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VkSamplerCreateInfo sampler = vkTools::initializers::samplerCreateInfo();
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sampler.magFilter = SHADOWMAP_FILTER;
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sampler.minFilter = SHADOWMAP_FILTER;
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sampler.mipmapMode = VK_SAMPLER_MIPMAP_MODE_LINEAR;
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sampler.addressModeU = VK_SAMPLER_ADDRESS_MODE_CLAMP_TO_EDGE;
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sampler.addressModeV = sampler.addressModeU;
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sampler.addressModeW = sampler.addressModeU;
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sampler.mipLodBias = 0.0f;
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sampler.maxAnisotropy = 0;
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sampler.minLod = 0.0f;
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sampler.maxLod = 1.0f;
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sampler.borderColor = VK_BORDER_COLOR_FLOAT_OPAQUE_WHITE;
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VK_CHECK_RESULT(vkCreateSampler(device, &sampler, nullptr, &offScreenFrameBuf.depthSampler));
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VkImageView attachments[2];
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attachments[0] = offScreenFrameBuf.color.view;
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attachments[1] = offScreenFrameBuf.depth.view;
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setupOffScreenRenderPass();
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prepareOffscreenRenderpass();
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// Create frame buffer
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VkFramebufferCreateInfo fbufCreateInfo = vkTools::initializers::framebufferCreateInfo();
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@ -428,15 +373,9 @@ public:
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void buildOffscreenCommandBuffer()
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{
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// Create separate command buffer for offscreen
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// rendering
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if (offScreenCmdBuffer == VK_NULL_HANDLE)
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{
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VkCommandBufferAllocateInfo cmd = vkTools::initializers::commandBufferAllocateInfo(
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cmdPool,
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VK_COMMAND_BUFFER_LEVEL_PRIMARY,
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1);
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VK_CHECK_RESULT(vkAllocateCommandBuffers(device, &cmd, &offScreenCmdBuffer));
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offScreenCmdBuffer = VulkanExampleBase::createCommandBuffer(VK_COMMAND_BUFFER_LEVEL_PRIMARY, false);
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}
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// Create a semaphore used to synchronize offscreen rendering and usage
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@ -461,6 +400,14 @@ public:
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VK_CHECK_RESULT(vkBeginCommandBuffer(offScreenCmdBuffer, &cmdBufInfo));
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// Change back layout of the depth attachment after sampling in the fragment shader
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vkTools::setImageLayout(
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offScreenCmdBuffer,
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offScreenFrameBuf.depth.image,
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VK_IMAGE_ASPECT_DEPTH_BIT,
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VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
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VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL);
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VkViewport viewport = vkTools::initializers::viewport((float)offScreenFrameBuf.width, (float)offScreenFrameBuf.height, 0.0f, 1.0f);
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vkCmdSetViewport(offScreenCmdBuffer, 0, 1, &viewport);
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@ -468,6 +415,7 @@ public:
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vkCmdSetScissor(offScreenCmdBuffer, 0, 1, &scissor);
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// Set depth bias (aka "Polygon offset")
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// Required to avoid shadow mapping artefacts
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vkCmdSetDepthBias(
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offScreenCmdBuffer,
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depthBiasConstant,
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@ -486,7 +434,13 @@ public:
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vkCmdEndRenderPass(offScreenCmdBuffer);
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updateTexture();
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// Change back layout of the depth attachment after sampling in the fragment shader
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vkTools::setImageLayout(
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offScreenCmdBuffer,
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offScreenFrameBuf.depth.image,
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VK_IMAGE_ASPECT_DEPTH_BIT,
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VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
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VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
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VK_CHECK_RESULT(vkEndCommandBuffer(offScreenCmdBuffer));
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}
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@ -550,47 +504,6 @@ public:
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}
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}
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void draw()
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{
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// Get next image in the swap chain (back/front buffer)
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VK_CHECK_RESULT(swapChain.acquireNextImage(semaphores.presentComplete, ¤tBuffer));
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submitPostPresentBarrier(swapChain.buffers[currentBuffer].image);
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// Submit offscreen command buffer for rendering depth buffer from light's pov
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// Wait for swap chain presentation to finish
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submitInfo.waitSemaphoreCount = 1;
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submitInfo.pWaitSemaphores = &semaphores.presentComplete;
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// Signal ready with offscreen semaphore
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submitInfo.signalSemaphoreCount = 1;
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submitInfo.pSignalSemaphores = &offscreenSemaphore;
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submitInfo.commandBufferCount = 1;
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submitInfo.pCommandBuffers = &offScreenCmdBuffer;
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VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
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// Submit current render command buffer
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submitInfo.commandBufferCount = 1;
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submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
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// Wait for offscreen semaphore
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submitInfo.waitSemaphoreCount = 1;
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submitInfo.pWaitSemaphores = &offscreenSemaphore;
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// Signal ready with render complete semaphpre
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submitInfo.signalSemaphoreCount = 1;
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submitInfo.pSignalSemaphores = &semaphores.renderComplete;
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// Submit to queue
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VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
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submitPrePresentBarrier(swapChain.buffers[currentBuffer].image);
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VK_CHECK_RESULT(swapChain.queuePresent(queue, currentBuffer, semaphores.renderComplete));
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}
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void loadMeshes()
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{
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loadMesh(getAssetPath() + "models/vulkanscene_shadow.dae", &meshes.scene, vertexLayout, 4.0f);
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@ -747,11 +660,11 @@ public:
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSet));
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// Image descriptor for the shadow map texture
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// Image descriptor for the shadow map attachment
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VkDescriptorImageInfo texDescriptor =
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vkTools::initializers::descriptorImageInfo(
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offScreenFrameBuf.textureTarget.sampler,
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offScreenFrameBuf.textureTarget.view,
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offScreenFrameBuf.depthSampler,
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offScreenFrameBuf.depth.view,
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VK_IMAGE_LAYOUT_GENERAL);
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std::vector<VkWriteDescriptorSet> writeDescriptorSets =
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@ -782,16 +695,16 @@ public:
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descriptorSets.offscreen,
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VK_DESCRIPTOR_TYPE_UNIFORM_BUFFER,
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0,
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&uniformDataOffscreenVS.descriptor),
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&uniformData.offscreen.descriptor),
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};
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vkUpdateDescriptorSets(device, offScreenWriteDescriptorSets.size(), offScreenWriteDescriptorSets.data(), 0, NULL);
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// 3D scene
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VK_CHECK_RESULT(vkAllocateDescriptorSets(device, &allocInfo, &descriptorSets.scene));
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// Image descriptor for the shadow map texture
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texDescriptor.sampler = offScreenFrameBuf.textureTarget.sampler;
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texDescriptor.imageView = offScreenFrameBuf.textureTarget.view;
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// Image descriptor for the shadow map attachment
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texDescriptor.sampler = offScreenFrameBuf.depthSampler;
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texDescriptor.imageView = offScreenFrameBuf.depth.view;
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std::vector<VkWriteDescriptorSet> sceneDescriptorSets =
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{
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@ -823,7 +736,7 @@ public:
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VkPipelineRasterizationStateCreateInfo rasterizationState =
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vkTools::initializers::pipelineRasterizationStateCreateInfo(
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VK_POLYGON_MODE_FILL,
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VK_CULL_MODE_FRONT_BIT,
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VK_CULL_MODE_NONE,
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VK_FRONT_FACE_CLOCKWISE,
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0);
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@ -874,8 +787,6 @@ public:
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renderPass,
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0);
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rasterizationState.cullMode = VK_CULL_MODE_NONE;
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pipelineCreateInfo.pVertexInputState = &vertices.inputState;
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pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
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pipelineCreateInfo.pRasterizationState = &rasterizationState;
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@ -892,13 +803,12 @@ public:
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// 3D scene
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shaderStages[0] = loadShader(getAssetPath() + "shaders/shadowmapping/scene.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
||||
shaderStages[1] = loadShader(getAssetPath() + "shaders/shadowmapping/scene.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
||||
rasterizationState.cullMode = VK_CULL_MODE_NONE;
|
||||
rasterizationState.cullMode = VK_CULL_MODE_BACK_BIT;
|
||||
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.scene));
|
||||
|
||||
// Offscreen pipeline
|
||||
shaderStages[0] = loadShader(getAssetPath() + "shaders/shadowmapping/offscreen.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
|
||||
shaderStages[1] = loadShader(getAssetPath() + "shaders/shadowmapping/offscreen.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
|
||||
pipelineCreateInfo.layout = pipelineLayouts.offscreen;
|
||||
// Cull front faces
|
||||
depthStencilState.depthCompareOp = VK_COMPARE_OP_LESS_OR_EQUAL;
|
||||
// Enable depth bias
|
||||
|
|
@ -911,6 +821,8 @@ public:
|
|||
dynamicStateEnables.size(),
|
||||
0);
|
||||
|
||||
pipelineCreateInfo.layout = pipelineLayouts.offscreen;
|
||||
pipelineCreateInfo.renderPass = offScreenFrameBuf.renderPass;
|
||||
VK_CHECK_RESULT(vkCreateGraphicsPipelines(device, pipelineCache, 1, &pipelineCreateInfo, nullptr, &pipelines.offscreen));
|
||||
}
|
||||
|
||||
|
|
@ -920,6 +832,7 @@ public:
|
|||
// Debug quad vertex shader uniform buffer block
|
||||
createBuffer(
|
||||
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
||||
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
||||
sizeof(uboVSscene),
|
||||
nullptr,
|
||||
&uniformDataVS.buffer,
|
||||
|
|
@ -929,15 +842,17 @@ public:
|
|||
// Offsvreen vertex shader uniform buffer block
|
||||
createBuffer(
|
||||
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
||||
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
||||
sizeof(uboOffscreenVS),
|
||||
nullptr,
|
||||
&uniformDataOffscreenVS.buffer,
|
||||
&uniformDataOffscreenVS.memory,
|
||||
&uniformDataOffscreenVS.descriptor);
|
||||
&uniformData.offscreen.buffer,
|
||||
&uniformData.offscreen.memory,
|
||||
&uniformData.offscreen.descriptor);
|
||||
|
||||
// Scene vertex shader uniform buffer block
|
||||
createBuffer(
|
||||
VK_BUFFER_USAGE_UNIFORM_BUFFER_BIT,
|
||||
VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT,
|
||||
sizeof(uboVSscene),
|
||||
nullptr,
|
||||
&uniformData.scene.buffer,
|
||||
|
|
@ -962,7 +877,7 @@ public:
|
|||
// Shadow map debug quad
|
||||
float AR = (float)height / (float)width;
|
||||
|
||||
uboVSquad.projection = glm::ortho(0.0f, 2.5f / AR, 0.0f, 2.5f, -1.0f, 1.0f);
|
||||
uboVSquad.projection = glm::ortho(2.5f / AR, 0.0f, 0.0f, 2.5f, -1.0f, 1.0f);
|
||||
uboVSquad.model = glm::mat4();
|
||||
|
||||
uint8_t *pData;
|
||||
|
|
@ -986,10 +901,9 @@ public:
|
|||
if (lightPOV)
|
||||
{
|
||||
uboVSscene.projection = glm::perspective(glm::radians(lightFOV), (float)width / (float)height, zNear, zFar);
|
||||
uboVSscene.view = glm::lookAt(lightPos, glm::vec3(0.0f), glm::vec3(0, 1, 0));
|
||||
uboVSscene.view = glm::lookAt(lightPos, glm::vec3(0.0f), glm::vec3(0.0f, 1.0f, 0.0f));
|
||||
}
|
||||
|
||||
|
||||
uboVSscene.depthBiasMVP = uboOffscreenVS.depthMVP;
|
||||
|
||||
VK_CHECK_RESULT(vkMapMemory(device, uniformData.scene.memory, 0, sizeof(uboVSscene), 0, (void **)&pData));
|
||||
|
|
@ -1001,82 +915,50 @@ public:
|
|||
{
|
||||
// Matrix from light's point of view
|
||||
glm::mat4 depthProjectionMatrix = glm::perspective(glm::radians(lightFOV), 1.0f, zNear, zFar);
|
||||
glm::mat4 depthViewMatrix = glm::lookAt(lightPos, glm::vec3(0, 0, 0), glm::vec3(0, 1, 0));
|
||||
glm::mat4 depthViewMatrix = glm::lookAt(lightPos, glm::vec3(0.0f), glm::vec3(0, 1, 0));
|
||||
glm::mat4 depthModelMatrix = glm::mat4();
|
||||
|
||||
uboOffscreenVS.depthMVP = depthProjectionMatrix * depthViewMatrix * depthModelMatrix;
|
||||
|
||||
uint8_t *pData;
|
||||
VK_CHECK_RESULT(vkMapMemory(device, uniformDataOffscreenVS.memory, 0, sizeof(uboOffscreenVS), 0, (void **)&pData));
|
||||
VK_CHECK_RESULT(vkMapMemory(device, uniformData.offscreen.memory, 0, sizeof(uboOffscreenVS), 0, (void **)&pData));
|
||||
memcpy(pData, &uboOffscreenVS, sizeof(uboOffscreenVS));
|
||||
vkUnmapMemory(device, uniformDataOffscreenVS.memory);
|
||||
vkUnmapMemory(device, uniformData.offscreen.memory);
|
||||
}
|
||||
|
||||
// Copy offscreen depth frame buffer contents to the depth texture
|
||||
void updateTexture()
|
||||
void draw()
|
||||
{
|
||||
// Make sure color writes to the framebuffer are finished before using it as transfer source
|
||||
vkTools::setImageLayout(
|
||||
offScreenCmdBuffer,
|
||||
offScreenFrameBuf.depth.image,
|
||||
VK_IMAGE_ASPECT_DEPTH_BIT,
|
||||
VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL,
|
||||
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL);
|
||||
VulkanExampleBase::prepareFrame();
|
||||
|
||||
// Transform texture target to transfer source
|
||||
vkTools::setImageLayout(
|
||||
offScreenCmdBuffer,
|
||||
offScreenFrameBuf.textureTarget.image,
|
||||
VK_IMAGE_ASPECT_DEPTH_BIT,
|
||||
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL,
|
||||
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL);
|
||||
// The scene render command buffer has to wait for the offscreen
|
||||
// rendering (and transfer) to be finished before using
|
||||
// the shadow map, so we need to synchronize
|
||||
// We use an additional semaphore for this
|
||||
|
||||
VkImageCopy imgCopy = {};
|
||||
// Offscreen rendering
|
||||
|
||||
imgCopy.srcSubresource.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
|
||||
imgCopy.srcSubresource.mipLevel = 0;
|
||||
imgCopy.srcSubresource.baseArrayLayer = 0;
|
||||
imgCopy.srcSubresource.layerCount = 1;
|
||||
// Wait for swap chain presentation to finish
|
||||
submitInfo.pWaitSemaphores = &semaphores.presentComplete;
|
||||
// Signal ready with offscreen semaphore
|
||||
submitInfo.pSignalSemaphores = &offscreenSemaphore;
|
||||
|
||||
imgCopy.srcOffset = { 0, 0, 0 };
|
||||
// Submit work
|
||||
submitInfo.commandBufferCount = 1;
|
||||
submitInfo.pCommandBuffers = &offScreenCmdBuffer;
|
||||
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
|
||||
|
||||
imgCopy.dstSubresource.aspectMask = VK_IMAGE_ASPECT_DEPTH_BIT;
|
||||
imgCopy.dstSubresource.mipLevel = 0;
|
||||
imgCopy.dstSubresource.baseArrayLayer = 0;
|
||||
imgCopy.dstSubresource.layerCount = 1;
|
||||
// Scene rendering
|
||||
|
||||
imgCopy.dstOffset = { 0, 0, 0 };
|
||||
// Wait for offscreen semaphore
|
||||
submitInfo.pWaitSemaphores = &offscreenSemaphore;
|
||||
// Signal ready with render complete semaphpre
|
||||
submitInfo.pSignalSemaphores = &semaphores.renderComplete;
|
||||
|
||||
imgCopy.extent.width = TEX_DIM;
|
||||
imgCopy.extent.height = TEX_DIM;
|
||||
imgCopy.extent.depth = 1;
|
||||
// Submit work
|
||||
submitInfo.pCommandBuffers = &drawCmdBuffers[currentBuffer];
|
||||
VK_CHECK_RESULT(vkQueueSubmit(queue, 1, &submitInfo, VK_NULL_HANDLE));
|
||||
|
||||
vkCmdCopyImage(
|
||||
offScreenCmdBuffer,
|
||||
offScreenFrameBuf.depth.image,
|
||||
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
|
||||
offScreenFrameBuf.textureTarget.image,
|
||||
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
|
||||
1,
|
||||
&imgCopy);
|
||||
|
||||
// Transform framebuffer color attachment back
|
||||
vkTools::setImageLayout(
|
||||
offScreenCmdBuffer,
|
||||
offScreenFrameBuf.depth.image,
|
||||
VK_IMAGE_ASPECT_DEPTH_BIT,
|
||||
VK_IMAGE_LAYOUT_TRANSFER_SRC_OPTIMAL,
|
||||
VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL);
|
||||
|
||||
// Transform texture target back to shader read
|
||||
// Makes sure that writes to the textuer are finished before
|
||||
// it's accessed in the shader
|
||||
vkTools::setImageLayout(
|
||||
offScreenCmdBuffer,
|
||||
offScreenFrameBuf.textureTarget.image,
|
||||
VK_IMAGE_ASPECT_DEPTH_BIT,
|
||||
VK_IMAGE_LAYOUT_TRANSFER_DST_OPTIMAL,
|
||||
VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL);
|
||||
VulkanExampleBase::submitFrame();
|
||||
}
|
||||
|
||||
void prepare()
|
||||
|
|
@ -1084,14 +966,13 @@ public:
|
|||
VulkanExampleBase::prepare();
|
||||
generateQuad();
|
||||
loadMeshes();
|
||||
prepareOffscreenFramebuffer();
|
||||
setupVertexDescriptions();
|
||||
prepareUniformBuffers();
|
||||
prepareTextureTarget(TEX_DIM, TEX_DIM, DEPTH_FORMAT);
|
||||
setupDescriptorSetLayout();
|
||||
preparePipelines();
|
||||
setupDescriptorPool();
|
||||
setupDescriptorSets();
|
||||
prepareOffscreenFramebuffer();
|
||||
buildCommandBuffers();
|
||||
buildOffscreenCommandBuffer();
|
||||
prepared = true;
|
||||
|
|
@ -1104,7 +985,6 @@ public:
|
|||
draw();
|
||||
if (!paused)
|
||||
{
|
||||
vkDeviceWaitIdle(device);
|
||||
updateLight();
|
||||
updateUniformBufferOffscreen();
|
||||
updateUniformBuffers();
|
||||
|
|
@ -1113,7 +993,6 @@ public:
|
|||
|
||||
virtual void viewChanged()
|
||||
{
|
||||
vkDeviceWaitIdle(device);
|
||||
updateUniformBufferOffscreen();
|
||||
updateUniformBuffers();
|
||||
}
|
||||
|
|
@ -1129,6 +1008,33 @@ public:
|
|||
lightPOV = !lightPOV;
|
||||
viewChanged();
|
||||
}
|
||||
|
||||
virtual void keyPressed(uint32_t keyCode)
|
||||
{
|
||||
switch (keyCode)
|
||||
{
|
||||
case 0x53:
|
||||
case GAMEPAD_BUTTON_A:
|
||||
toggleShadowMapDisplay();
|
||||
break;
|
||||
case 0x4C:
|
||||
case GAMEPAD_BUTTON_X:
|
||||
toogleLightPOV();
|
||||
break;
|
||||
}
|
||||
}
|
||||
|
||||
virtual void getOverlayText(VulkanTextOverlay *textOverlay)
|
||||
{
|
||||
#if defined(__ANDROID__)
|
||||
textOverlay->addText("Press \"Button A\" to toggle shadow map", 5.0f, 85.0f, VulkanTextOverlay::alignLeft);
|
||||
textOverlay->addText("Press \"Button X\" to toggle light's pov", 5.0f, 100.0f, VulkanTextOverlay::alignLeft);
|
||||
#else
|
||||
textOverlay->addText("Press \"s\" to toggle shadow map", 5.0f, 85.0f, VulkanTextOverlay::alignLeft);
|
||||
textOverlay->addText("Press \"l\" to toggle light's pov", 5.0f, 100.0f, VulkanTextOverlay::alignLeft);
|
||||
#endif
|
||||
}
|
||||
|
||||
};
|
||||
|
||||
VulkanExample *vulkanExample;
|
||||
|
|
@ -1139,18 +1045,6 @@ LRESULT CALLBACK WndProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
|
|||
if (vulkanExample != NULL)
|
||||
{
|
||||
vulkanExample->handleMessages(hWnd, uMsg, wParam, lParam);
|
||||
if (uMsg == WM_KEYDOWN)
|
||||
{
|
||||
switch (wParam)
|
||||
{
|
||||
case 0x53:
|
||||
vulkanExample->toggleShadowMapDisplay();
|
||||
break;
|
||||
case 0x4C:
|
||||
vulkanExample->toogleLightPOV();
|
||||
break;
|
||||
}
|
||||
}
|
||||
}
|
||||
return (DefWindowProc(hWnd, uMsg, wParam, lParam));
|
||||
}
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue