完成顶点缓冲区
parent
b19c7666b2
commit
b9f19473ef
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@ -713,40 +713,99 @@ void HelloTriangleApplication::createCommandPool()
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}
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void HelloTriangleApplication::createVertexBuffer()
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{
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VkDeviceSize bufferSize = sizeof(vertices[0]) * vertices.size();
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VkBuffer stagingBuffer;
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VkDeviceMemory stagingBufferMemory;
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createBuffer(bufferSize, VK_BUFFER_USAGE_TRANSFER_SRC_BIT, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT, stagingBuffer ,stagingBufferMemory);
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void* data;
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vkMapMemory(device, stagingBufferMemory, 0, bufferSize, 0, &data);
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memcpy(data, vertices.data(), (size_t)bufferSize);
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vkUnmapMemory(device, stagingBufferMemory);
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// host visible buffer as temp buffer
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createBuffer(bufferSize, VK_BUFFER_USAGE_TRANSFER_DST_BIT | VK_BUFFER_USAGE_VERTEX_BUFFER_BIT , VK_MEMORY_PROPERTY_DEVICE_LOCAL_BIT, vertexBuffer, vertexBufferMemory);
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// move the vertex data to the device local buffer
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copyBuffer(stagingBuffer, vertexBuffer, bufferSize);
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vkDestroyBuffer(device, stagingBuffer, nullptr);
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vkFreeMemory(device, stagingBufferMemory, nullptr);
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}
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void HelloTriangleApplication::createBuffer(VkDeviceSize size, VkBufferUsageFlags usage, VkMemoryPropertyFlags properties, VkBuffer& buffer, VkDeviceMemory& bufferMemory)
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{
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VkBufferCreateInfo bufferInfo{};
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bufferInfo.sType = VK_STRUCTURE_TYPE_BUFFER_CREATE_INFO;
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bufferInfo.size = sizeof(vertices[0]) * vertices.size();
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bufferInfo.usage = VK_BUFFER_USAGE_VERTEX_BUFFER_BIT;
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bufferInfo.size = size;
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bufferInfo.usage = usage;
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bufferInfo.sharingMode = VK_SHARING_MODE_EXCLUSIVE;
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if (vkCreateBuffer(device,&bufferInfo,nullptr,&vertexBuffer) != VK_SUCCESS)
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if (vkCreateBuffer(device, &bufferInfo, nullptr, &buffer) != VK_SUCCESS)
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{
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throw std::runtime_error("failed to create vertex buffer in createVertexBuffer");
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}
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VkMemoryRequirements memRequirement;
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vkGetBufferMemoryRequirements(device, vertexBuffer, &memRequirement);
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VkMemoryRequirements memRequirements;
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vkGetBufferMemoryRequirements(device, buffer, &memRequirements);
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VkMemoryAllocateInfo allocInfo{};
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allocInfo.sType = VK_STRUCTURE_TYPE_MEMORY_ALLOCATE_INFO;
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allocInfo.allocationSize = memRequirement.size;
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allocInfo.memoryTypeIndex = findMemoryType(memRequirement.memoryTypeBits, VK_MEMORY_PROPERTY_HOST_VISIBLE_BIT | VK_MEMORY_PROPERTY_HOST_COHERENT_BIT);
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allocInfo.allocationSize = memRequirements.size;
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allocInfo.memoryTypeIndex = findMemoryType(memRequirements.memoryTypeBits, properties);
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if (vkAllocateMemory(device,&allocInfo,nullptr,&vertexBufferMemory) != VK_SUCCESS)
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if (vkAllocateMemory(device, &allocInfo, nullptr, &bufferMemory) != VK_SUCCESS)
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{
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throw std::runtime_error("failed to allocate vertex buffer memory!");
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}
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vkBindBufferMemory(device, vertexBuffer, vertexBufferMemory, 0);
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void* data;
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vkMapMemory(device, vertexBufferMemory, 0, bufferInfo.size, 0, &data);
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memcpy(data, vertices.data(), (size_t)bufferInfo.size);
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vkUnmapMemory(device, vertexBufferMemory);
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vkBindBufferMemory(device, buffer, bufferMemory, 0);
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}
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void HelloTriangleApplication::copyBuffer(VkBuffer srcBuffer, VkBuffer dstBuffer, VkDeviceSize size)
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{
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VkCommandBufferAllocateInfo allocInfo{};
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allocInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_ALLOCATE_INFO;
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allocInfo.level = VK_COMMAND_BUFFER_LEVEL_PRIMARY;
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allocInfo.commandPool = commandPool;
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allocInfo.commandBufferCount = 1;
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VkCommandBuffer commandBuffer;
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vkAllocateCommandBuffers(device, &allocInfo, &commandBuffer);
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VkCommandBufferBeginInfo beginInfo{};
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beginInfo.sType = VK_STRUCTURE_TYPE_COMMAND_BUFFER_BEGIN_INFO;
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beginInfo.flags = VK_COMMAND_BUFFER_USAGE_ONE_TIME_SUBMIT_BIT;
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vkBeginCommandBuffer(commandBuffer, &beginInfo);
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VkBufferCopy copyRegin{};
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copyRegin.srcOffset = 0;
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copyRegin.dstOffset = 0;
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copyRegin.size = size;
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vkCmdCopyBuffer(commandBuffer, srcBuffer, dstBuffer, 1, ©Regin);
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vkEndCommandBuffer(commandBuffer);
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VkSubmitInfo submitInfo{};
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submitInfo.sType = VK_STRUCTURE_TYPE_SUBMIT_INFO;
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submitInfo.commandBufferCount = 1;
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submitInfo.pCommandBuffers = &commandBuffer;
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vkQueueSubmit(graphicQueue, 1, &submitInfo, VK_NULL_HANDLE);
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vkQueueWaitIdle(graphicQueue);
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vkFreeCommandBuffers(device, commandPool, 1, &commandBuffer);
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}
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uint32_t HelloTriangleApplication::findMemoryType(uint32_t typeFilter, VkMemoryPropertyFlags properties)
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{
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VkPhysicalDeviceMemoryProperties memProperties;
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@ -179,6 +179,9 @@ private:
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void createCommandPool();
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void createVertexBuffer();
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void createBuffer(VkDeviceSize size,VkBufferUsageFlags usage,VkMemoryPropertyFlags properties,VkBuffer& buffer,VkDeviceMemory& bufferMemory);
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void copyBuffer(VkBuffer srcBuffer, VkBuffer dstBuffer, VkDeviceSize size);
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uint32_t findMemoryType(uint32_t typeFilter, VkMemoryPropertyFlags properties);
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