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Moved vertex input state setup to pipeline creation

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saschawillems 2017-01-21 22:05:21 +01:00
parent 90b8c82f75
commit c7303e4e67
1 changed files with 46 additions and 44 deletions
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90
triangle/triangle.cpp
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@ -6,7 +6,7 @@
* Contrary to the other examples, this one won't make use of helper functions or initializers
* Except in a few cases (swap chain setup e.g.)
*
* Copyright (C) 2016 by Sascha Willems - www.saschawillems.de
* Copyright (C) 2016-2017 by Sascha Willems - www.saschawillems.de
*
* This code is licensed under the MIT license (MIT) (http://opensource.org/licenses/MIT)
*/
@ -27,7 +27,6 @@
#include <vulkan/vulkan.h>
#include "vulkanexamplebase.h"
#define VERTEX_BUFFER_BIND_ID 0
// Set to "true" to enable Vulkan's validation layers (see vulkandebug.cpp for details)
#define ENABLE_VALIDATION false
// Set to "true" to use staging buffers for uploading vertex and index data to device local memory
@ -37,13 +36,16 @@
class VulkanExample : public VulkanExampleBase
{
public:
// Vertex layout used in this example
struct Vertex {
float position[3];
float color[3];
};
// Vertex buffer and attributes
struct {
VkDeviceMemory memory; // Handle to the device memory for this buffer
VkBuffer buffer; // Handle to the Vulkan buffer object that the memory is bound to
VkPipelineVertexInputStateCreateInfo inputState;
VkVertexInputBindingDescription inputBinding;
std::vector<VkVertexInputAttributeDescription> inputAttributes;
} vertices;
// Index buffer
@ -310,7 +312,7 @@ public:
// Bind triangle vertex buffer (contains position and colors)
VkDeviceSize offsets[1] = { 0 };
vkCmdBindVertexBuffers(drawCmdBuffers[i], VERTEX_BUFFER_BIND_ID, 1, &vertices.buffer, offsets);
vkCmdBindVertexBuffers(drawCmdBuffers[i], 0, 1, &vertices.buffer, offsets);
// Bind triangle index buffer
vkCmdBindIndexBuffer(drawCmdBuffers[i], indices.buffer, 0, VK_INDEX_TYPE_UINT32);
@ -366,12 +368,6 @@ public:
// This is a very complex topic and while it's fine for an example application to to small individual memory allocations that is not
// what should be done a real-world application, where you should allocate large chunkgs of memory at once isntead.
struct Vertex
{
float position[3];
float color[3];
};
// Setup vertices
std::vector<Vertex> vertexBuffer =
{
@ -536,36 +532,6 @@ public:
vkUnmapMemory(device, indices.memory);
VK_CHECK_RESULT(vkBindBufferMemory(device, indices.buffer, indices.memory, 0));
}
// Vertex input binding
vertices.inputBinding.binding = VERTEX_BUFFER_BIND_ID;
vertices.inputBinding.stride = sizeof(Vertex);
vertices.inputBinding.inputRate = VK_VERTEX_INPUT_RATE_VERTEX;
// Inpute attribute binding describe shader attribute locations and memory layouts
// These match the following shader layout (see triangle.vert):
// layout (location = 0) in vec3 inPos;
// layout (location = 1) in vec3 inColor;
vertices.inputAttributes.resize(2);
// Attribute location 0: Position
vertices.inputAttributes[0].binding = VERTEX_BUFFER_BIND_ID;
vertices.inputAttributes[0].location = 0;
vertices.inputAttributes[0].format = VK_FORMAT_R32G32B32_SFLOAT;
vertices.inputAttributes[0].offset = offsetof(Vertex, position);
// Attribute location 1: Color
vertices.inputAttributes[1].binding = VERTEX_BUFFER_BIND_ID;
vertices.inputAttributes[1].location = 1;
vertices.inputAttributes[1].format = VK_FORMAT_R32G32B32_SFLOAT;
vertices.inputAttributes[1].offset = offsetof(Vertex, color);
// Assign to the vertex input state used for pipeline creation
vertices.inputState.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
vertices.inputState.pNext = nullptr;
vertices.inputState.flags = VK_FLAGS_NONE;
vertices.inputState.vertexBindingDescriptionCount = 1;
vertices.inputState.pVertexBindingDescriptions = &vertices.inputBinding;
vertices.inputState.vertexAttributeDescriptionCount = static_cast<uint32_t>(vertices.inputAttributes.size());
vertices.inputState.pVertexAttributeDescriptions = vertices.inputAttributes.data();
}
void setupDescriptorPool()
@ -957,7 +923,43 @@ public:
multisampleState.rasterizationSamples = VK_SAMPLE_COUNT_1_BIT;
multisampleState.pSampleMask = nullptr;
// Load shaders
// Vertex input descriptions
// Specifies the vertex input parameters for a pipeline
// Vertex input binding
// This example uses a single vertex input binding at binding point 0 (see vkCmdBindVertexBuffers)
VkVertexInputBindingDescription vertexInputBinding = {};
vertexInputBinding.binding = 0;
vertexInputBinding.stride = sizeof(Vertex);
vertexInputBinding.inputRate = VK_VERTEX_INPUT_RATE_VERTEX;
// Inpute attribute bindings describe shader attribute locations and memory layouts
std::array<VkVertexInputAttributeDescription,2> vertexInputAttributs;
// These match the following shader layout (see triangle.vert):
// layout (location = 0) in vec3 inPos;
// layout (location = 1) in vec3 inColor;
// Attribute location 0: Position
vertexInputAttributs[0].binding = 0;
vertexInputAttributs[0].location = 0;
// Position attribute is three 32 bit signed (SFLOAT) floats (R32 G32 B32)
vertexInputAttributs[0].format = VK_FORMAT_R32G32B32_SFLOAT;
vertexInputAttributs[0].offset = offsetof(Vertex, position);
// Attribute location 1: Color
vertexInputAttributs[1].binding = 0;
vertexInputAttributs[1].location = 1;
// Color attribute is three 32 bit signed (SFLOAT) floats (R32 G32 B32)
vertexInputAttributs[1].format = VK_FORMAT_R32G32B32_SFLOAT;
vertexInputAttributs[1].offset = offsetof(Vertex, color);
// Vertex input state used for pipeline creation
VkPipelineVertexInputStateCreateInfo vertexInputState = {};
vertexInputState.sType = VK_STRUCTURE_TYPE_PIPELINE_VERTEX_INPUT_STATE_CREATE_INFO;
vertexInputState.vertexBindingDescriptionCount = 1;
vertexInputState.pVertexBindingDescriptions = &vertexInputBinding;
vertexInputState.vertexAttributeDescriptionCount = 2;
vertexInputState.pVertexAttributeDescriptions = vertexInputAttributs.data();
// Shaders
std::array<VkPipelineShaderStageCreateInfo, 2> shaderStages{};
// Vertex shader
@ -985,7 +987,7 @@ public:
pipelineCreateInfo.pStages = shaderStages.data();
// Assign the pipeline states to the pipeline creation info structure
pipelineCreateInfo.pVertexInputState = &vertices.inputState;
pipelineCreateInfo.pVertexInputState = &vertexInputState;
pipelineCreateInfo.pInputAssemblyState = &inputAssemblyState;
pipelineCreateInfo.pRasterizationState = &rasterizationState;
pipelineCreateInfo.pColorBlendState = &colorBlendState;