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Code cleanup, simplifications, comments

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This commit is contained in:
saschawillems 2018-07-17 19:00:55 +02:00
parent e64f4cf5e4
commit 583a665990
3 changed files with 18 additions and 30 deletions
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45
examples/inputattachments/inputattachments.cpp
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@ -217,8 +217,8 @@ public:
createAttachment(depthFormat, VK_IMAGE_USAGE_DEPTH_STENCIL_ATTACHMENT_BIT, &attachments.depth);
std::array<VkAttachmentDescription, 3> attachments{};
// Swap chain image
// Part of the render pass so we don't have to manually do the layout transitions
// Swap chain image color attachment
attachments[0].format = swapChain.colorFormat;
attachments[0].samples = VK_SAMPLE_COUNT_1_BIT;
attachments[0].loadOp = VK_ATTACHMENT_LOAD_OP_CLEAR;
@ -252,36 +252,32 @@ public:
/*
First subpass
Fill attachments
Fill the color and depth attachments
*/
VkAttachmentReference colorReferences[2];
colorReferences[0] = { 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
colorReferences[1] = { 1, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
VkAttachmentReference colorReference = { 1, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
VkAttachmentReference depthReference = { 2, VK_IMAGE_LAYOUT_DEPTH_STENCIL_ATTACHMENT_OPTIMAL };
subpassDescriptions[0].pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
subpassDescriptions[0].colorAttachmentCount = 2;
subpassDescriptions[0].pColorAttachments = colorReferences;
subpassDescriptions[0].colorAttachmentCount = 1;
subpassDescriptions[0].pColorAttachments = &colorReference;
subpassDescriptions[0].pDepthStencilAttachment = &depthReference;
/*
Second subpass
Input attachment read
Input attachment read and swap chain color attachment write
*/
VkAttachmentReference colorReference = { 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
VkAttachmentReference inputReferences[3];
inputReferences[0] = { 1, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL };
inputReferences[1] = { 2, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL };
uint32_t preserveAttachmentIndex = 1;
// Color reference (target) for this sub pass is the swap chain color attachment
VkAttachmentReference colorReferenceSwapchain = { 0, VK_IMAGE_LAYOUT_COLOR_ATTACHMENT_OPTIMAL };
subpassDescriptions[1].pipelineBindPoint = VK_PIPELINE_BIND_POINT_GRAPHICS;
subpassDescriptions[1].colorAttachmentCount = 1;
subpassDescriptions[1].pColorAttachments = &colorReference;
subpassDescriptions[1].pDepthStencilAttachment = nullptr;
subpassDescriptions[1].pColorAttachments = &colorReferenceSwapchain;
// Color and depth attachment written to in first sub pass will be used as input attachments to be read in the fragment shader
VkAttachmentReference inputReferences[2];
inputReferences[0] = { 1, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL };
inputReferences[1] = { 2, VK_IMAGE_LAYOUT_SHADER_READ_ONLY_OPTIMAL };
// Use the attachments filled in the first pass as input attachments
subpassDescriptions[1].inputAttachmentCount = 2;
@ -536,14 +532,6 @@ public:
pipelineCI.pVertexInputState = &vertexInputStateCI;
std::array<VkPipelineColorBlendAttachmentState, 2> blendAttachmentStates = {
vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE),
vks::initializers::pipelineColorBlendAttachmentState(0xf, VK_FALSE),
};
colorBlendStateCI.attachmentCount = static_cast<uint32_t>(blendAttachmentStates.size());
colorBlendStateCI.pAttachments = blendAttachmentStates.data();
shaderStages[0] = loadShader(getAssetPath() + "shaders/inputattachments/attachmentwrite.vert.spv", VK_SHADER_STAGE_VERTEX_BIT);
shaderStages[1] = loadShader(getAssetPath() + "shaders/inputattachments/attachmentwrite.frag.spv", VK_SHADER_STAGE_FRAGMENT_BIT);
@ -623,8 +611,9 @@ public:
{
createInfo.renderPass = uiRenderPass;
createInfo.framebuffers = frameBuffers;
createInfo.targetSubpass = 1;
createInfo.subpassCount = 2;
createInfo.attachmentCount = 2;
createInfo.attachmentCount = 1;
createInfo.clearValues = {
{ { 0.0f, 0.0f, 0.0f, 0.0f } },
{ { 0.0f, 0.0f, 0.0f, 0.0f } },