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vulkanTutorial
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完成顶点缓冲区

master
InkSoul 2024-03-14 16:39:19 +08:00
parent b19c7666b2
commit b9f19473ef
2 changed files with 76 additions and 14 deletions
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87
VulkanTutorial.cpp
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@ -713,40 +713,99 @@ void HelloTriangleApplication::createCommandPool()
}
void HelloTriangleApplication::createVertexBuffer()
{
VkDeviceSize bufferSize = sizeof(vertices[0]) * vertices.size();
VkBuffer stagingBuffer;
VkDeviceMemory stagingBufferMemory;
createBuffer(bufferSize, VK_BUFFER_USAGE_TRANSFER_SRC_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, stagingBuffer ,stagingBufferMemory);
void* data;
vkMapMemory(device, stagingBufferMemory, 0, bufferSize, 0, &data);
memcpy(data, vertices.data(), (size_t)bufferSize);
vkUnmapMemory(device, stagingBufferMemory);
// host visible buffer as temp buffer
createBuffer(bufferSize, VK_BUFFER_USAGE_TRANSFER_DST_BIT | VK_BUFFER_USAGE_VERTEX_BUFFER_BIT , VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, vertexBuffer, vertexBufferMemory);
// move the vertex data to the device local buffer
copyBuffer(stagingBuffer, vertexBuffer, bufferSize);
vkDestroyBuffer(device, stagingBuffer, nullptr);
vkFreeMemory(device, stagingBufferMemory, nullptr);
}
void HelloTriangleApplication::createBuffer(VkDeviceSize size, VkBufferUsageFlags usage, VkMemoryPropertyFlags properties, VkBuffer& buffer, VkDeviceMemory& bufferMemory)
{
VkBufferCreateInfo bufferInfo{};
bufferInfo.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
bufferInfo.size = sizeof(vertices[0]) * vertices.size();
bufferInfo.usage = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT;
bufferInfo.size = size;
bufferInfo.usage = usage;
bufferInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
if (vkCreateBuffer(device,&bufferInfo,nullptr,&vertexBuffer) != VK_SUCCESS)
if (vkCreateBuffer(device, &bufferInfo, nullptr, &buffer) != VK_SUCCESS)
{
throw std::runtime_error("failed to create vertex buffer in createVertexBuffer");
}
VkMemoryRequirements memRequirement;
vkGetBufferMemoryRequirements(device, vertexBuffer, &memRequirement);
VkMemoryRequirements memRequirements;
vkGetBufferMemoryRequirements(device, buffer, &memRequirements);
VkMemoryAllocateInfo allocInfo{};
allocInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
allocInfo.allocationSize = memRequirement.size;
allocInfo.memoryTypeIndex = findMemoryType(memRequirement.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT);
allocInfo.allocationSize = memRequirements.size;
allocInfo.memoryTypeIndex = findMemoryType(memRequirements.memoryTypeBits, properties);
if (vkAllocateMemory(device,&allocInfo,nullptr,&vertexBufferMemory) != VK_SUCCESS)
if (vkAllocateMemory(device, &allocInfo, nullptr, &bufferMemory) != VK_SUCCESS)
{
throw std::runtime_error("failed to allocate vertex buffer memory!");
}
vkBindBufferMemory(device, vertexBuffer, vertexBufferMemory, 0);
void* data;
vkMapMemory(device, vertexBufferMemory, 0, bufferInfo.size, 0, &data);
memcpy(data, vertices.data(), (size_t)bufferInfo.size);
vkUnmapMemory(device, vertexBufferMemory);
vkBindBufferMemory(device, buffer, bufferMemory, 0);
}
void HelloTriangleApplication::copyBuffer(VkBuffer srcBuffer, VkBuffer dstBuffer, VkDeviceSize size)
{
VkCommandBufferAllocateInfo allocInfo{};
allocInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
allocInfo.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
allocInfo.commandPool = commandPool;
allocInfo.commandBufferCount = 1;
VkCommandBuffer commandBuffer;
vkAllocateCommandBuffers(device, &allocInfo, &commandBuffer);
VkCommandBufferBeginInfo beginInfo{};
beginInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
beginInfo.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
vkBeginCommandBuffer(commandBuffer, &beginInfo);
VkBufferCopy copyRegin{};
copyRegin.srcOffset = 0;
copyRegin.dstOffset = 0;
copyRegin.size = size;
vkCmdCopyBuffer(commandBuffer, srcBuffer, dstBuffer, 1, &copyRegin);
vkEndCommandBuffer(commandBuffer);
VkSubmitInfo submitInfo{};
submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
submitInfo.commandBufferCount = 1;
submitInfo.pCommandBuffers = &commandBuffer;
vkQueueSubmit(graphicQueue, 1, &submitInfo, VK_NULL_HANDLE);
vkQueueWaitIdle(graphicQueue);
vkFreeCommandBuffers(device, commandPool, 1, &commandBuffer);
}
uint32_t HelloTriangleApplication::findMemoryType(uint32_t typeFilter, VkMemoryPropertyFlags properties)
{
VkPhysicalDeviceMemoryProperties memProperties;

3
VulkanTutorial.h
View File

@ -179,6 +179,9 @@ private:
void createCommandPool();
void createVertexBuffer();
void createBuffer(VkDeviceSize size,VkBufferUsageFlags usage,VkMemoryPropertyFlags properties,VkBuffer& buffer,VkDeviceMemory& bufferMemory);
void copyBuffer(VkBuffer srcBuffer, VkBuffer dstBuffer, VkDeviceSize size);
uint32_t findMemoryType(uint32_t typeFilter, VkMemoryPropertyFlags properties);