yorung’s gists

yorung / create_constant_buffer.cpp

Created July 9, 2016 09:06

[DX12] Create a huge constant buffer and Map it

	static const UINT maxConstantBufferBlocks = 1000;

	ComPtr<ID3D12Resource> constantBuffer;
	struct { char buf[0x100]; } *mappedConstantBuffer = nullptr;

	int size = maxConstantBufferBlocks * 0x100;

	D3D12_HEAP_PROPERTIES prop = { D3D12_HEAP_TYPE_UPLOAD, D3D12_CPU_PAGE_PROPERTY_UNKNOWN, D3D12_MEMORY_POOL_UNKNOWN, 1, 1 };
	D3D12_RESOURCE_DESC desc = { D3D12_RESOURCE_DIMENSION_BUFFER, 0, (UINT64)size, 1, 1, 1, DXGI_FORMAT_UNKNOWN, { 1, 0 }, D3D12_TEXTURE_LAYOUT_ROW_MAJOR, D3D12_RESOURCE_FLAG_NONE };
	device->CreateCommittedResource(&prop, D3D12_HEAP_FLAG_NONE, &desc, D3D12_RESOURCE_STATE_GENERIC_READ, nullptr, IID_PPV_ARGS(&constantBuffer));

yorung / heap_binder.cpp

Created May 8, 2016 06:40

Bind a descriptor heap.

	void afSetDescriptorHeap(ComPtr<ID3D12DescriptorHeap> heap)
	{
	ID3D12GraphicsCommandList* list = deviceMan.GetCommandList();
	ID3D12DescriptorHeap* ppHeaps[] = { heap.Get() };
	list->SetDescriptorHeaps(_countof(ppHeaps), ppHeaps);
	list->SetGraphicsRootDescriptorTable(0, heap->GetGPUDescriptorHandleForHeapStart());
	}

yorung / descriptor_heap_helper.cpp

Created May 8, 2016 01:53

A helper function to create descriptor heap from array of ID3D12Resource.

	ComPtr<ID3D12DescriptorHeap> afCreateDescriptorHeap(int numSrvs, ComPtr<ID3D12Resource> srvs[])
	{
	ComPtr<ID3D12DescriptorHeap> heap;
	D3D12_DESCRIPTOR_HEAP_DESC srvHeapDesc = {};
	srvHeapDesc.NumDescriptors = numSrvs;
	srvHeapDesc.Type = D3D12_DESCRIPTOR_HEAP_TYPE_CBV_SRV_UAV;
	srvHeapDesc.Flags = D3D12_DESCRIPTOR_HEAP_FLAG_SHADER_VISIBLE;
	HRESULT hr = deviceMan.GetDevice()->CreateDescriptorHeap(&srvHeapDesc, IID_PPV_ARGS(&heap));
	assert(hr == S_OK);
	for (int i = 0; i < numSrvs; i++) {

yorung / root_signature_helper.cpp

Created May 8, 2016 01:25

A wrapper for root signature creation.

	ComPtr<ID3D12RootSignature> afCreateRootSignature(int numDescriptors, D3D12_DESCRIPTOR_RANGE descriptors[], int numSamplers, D3D12_STATIC_SAMPLER_DESC samplers[])
	{
	ComPtr<ID3D12RootSignature> rs;
	ComPtr<ID3DBlob> signature;
	ComPtr<ID3DBlob> error;

	D3D12_ROOT_PARAMETER rootParameter = {};
	rootParameter.ParameterType = D3D12_ROOT_PARAMETER_TYPE_DESCRIPTOR_TABLE;
	rootParameter.ShaderVisibility = D3D12_SHADER_VISIBILITY_ALL;
	rootParameter.DescriptorTable.NumDescriptorRanges = numDescriptors;

yorung / wrapper_classes.h

Last active May 8, 2016 00:51

DirectX 12 wrapper classes to simplify.

	class CSampler : public D3D12_STATIC_SAMPLER_DESC
	{
	public:
	CSampler(int shaderRegister, D3D12_FILTER samplerFilter, D3D12_TEXTURE_ADDRESS_MODE wrap)
	{
	Filter = samplerFilter;
	AddressU = wrap;
	AddressV = wrap;
	AddressW = D3D12_TEXTURE_ADDRESS_MODE_CLAMP;
	MipLODBias = 0;

yorung / draw.cpp

Last active May 8, 2016 06:27

DX12 pseudo code of drawing

	ID3D12GraphicsCommandList* list = deviceMan.GetCommandList();

	list->SetPipelineState(pipelineState.Get());
	list->SetGraphicsRootSignature(rootSignature.Get());

	afSetDescriptorHeap(heap);

	afWriteBuffer(uboId, &invVP, sizeof(invVP));

	list->IASetPrimitiveTopology(D3D_PRIMITIVE_TOPOLOGY_TRIANGLESTRIP);

yorung / create_resources.cpp

Last active April 27, 2016 13:44

DX12 pseudo code of resource generation.

	ComPtr<ID3D12Resource> texId = afLoadTexture(texFileName, texDesc);
	ComPtr<ID3D12Resource> uboId = afCreateUBO(sizeof(Mat));
	ComPtr<ID3D12Resource> srvs[] = {
	uboId,
	texId,
	};
	ComPtr<ID3D12DescriptorHeap> heap = afCreateDescriptorHeap(dimof(srvs), srvs);

yorung / create_pso.cpp

Last active May 8, 2016 00:52

DX12 pseudo code of creating A PSO.

	D3D12_DESCRIPTOR_RANGE descriptors[] = { // The descriptor table
	CDescriptorCBV(0), // constant buffer view bound to register b0
	CDescriptorSRV(0), // shader resource view bound to register t0
	};
	D3D12_STATIC_SAMPLER_DESC samplers[] = {
	CSampler(0, D3D12_FILTER_MIN_MAG_LINEAR_MIP_POINT, D3D12_TEXTURE_ADDRESS_MODE_WRAP), // sampler bound to register s0
	};
	ComPtr<ID3D12RootSignature> rootSignature = afCreateRootSignature(dimof(descriptors), descriptors, dimof(samplers), samplers);
	ComPtr<ID3D12PipelineState> pipelineState = afCreatePSO(shader, nullptr, 0, BM_NONE, DSM_DEPTH_CLOSEREQUAL_READONLY, CM_DISABLE, rootSignature);

yorung / sample_vertex_shader.vert.glsl

Created March 28, 2016 16:38

A simple GLSL vertex shader

	#version 310 es

	precision highp float;
	in vec3 POSITION;
	in vec2 TEXCOORD;
	in vec4 COLOR;
	out vec2 texcoord;
	out vec4 color;
	layout (binding = 0) uniform matUbo {
	layout (row_major) mat4 matProj;

yorung / vao_maker.cpp

Last active March 28, 2016 16:47

A OpenGL sample to create vertex array object(VAO)

	void afSetVertexAttributes(const InputElement elements[], int numElements, int numBuffers, GLuint const vertexBufferIds[], const int strides[])
	{
	for (int i = 0; i < numElements; i++) {
	const InputElement& d = elements[i];
	glBindBuffer(GL_ARRAY_BUFFER, vertexBufferIds[d.inputSlot]);
	GLenum r = glGetError();
	if (r != GL_NO_ERROR) {
	aflog("glBindBuffer error! i=%d inputSlot=%d vbo=%d\n", i, d.inputSlot, vertexBufferIds[d.inputSlot].x);
	}
	afHandleGLError(glEnableVertexAttribArray(i));

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