ComputerGraphicsStart/Shader.h at master · charlescookey/ComputerGraphicsStart · GitHub

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#pragma once
#include "DXCore.h"
#include <string>
#include <fstream>
#include <sstream>

#include <D3Dcompiler.h>
#include <d3d11shader.h>

#include <map>
#include "ShaderReflection.h"

#pragma comment(lib, "dxguid.lib")


struct alignas(16) ConstantBuffer3
{
	float time;
};

struct alignas(16) ConstantBuffer2
{
	float time;
	float padding[3];
	Vec4 lights[4];
};


ID3D11Buffer* constantBuffer;

std::string readFile(std::string filename) {
	std::ifstream infile(filename);
	std::stringstream output;
	output << infile.rdbuf();
	infile.close();
	return output.str();
}

class Shader {
public:
	ID3D11VertexShader* vertexShader;
	ID3D11PixelShader* pixelShader;

	ID3D11InputLayout* layout;

	void init(std::string VS_filename , std::string PS_filename, DXCOre* core) {
		std::string vs = readFile(VS_filename);
		std::string ps = readFile(PS_filename);

		loadVS(core, vs);
		loadPS(core, ps);
	}

	void init_anim(std::string VS_filename, std::string PS_filename, DXCOre* core) {
		std::string vs = readFile(VS_filename);
		std::string ps = readFile(PS_filename);

		loadVS_Skeletal(core, vs);
		loadPS(core, ps);
	}

	void init_inst(std::string VS_filename, std::string PS_filename, DXCOre* core) {
		std::string vs = readFile(VS_filename);
		std::string ps = readFile(PS_filename);

		loadVS_Instance(core, vs);
		loadPS(core, ps);
	}

	std::vector<ConstantBuffer> psConstantBuffers;
	std::vector<ConstantBuffer> vsConstantBuffers;
	std::map<std::string, int> textureBindPointsVS;
	std::map<std::string, int> textureBindPointsPS;


	void loadVS(DXCOre* core, std::string vertexShaderHLSL)
	{
		ID3DBlob* compiledVertexShader;
		ID3DBlob* status;
		HRESULT hr = D3DCompile(vertexShaderHLSL.c_str(), strlen(vertexShaderHLSL.c_str()), NULL, NULL, NULL, "VS", "vs_5_0", 0, 0, &compiledVertexShader, &status);
		if (FAILED(hr))
		{
			MessageBoxA(NULL, (char*)status->GetBufferPointer(), "Vertex Shader Error", 0);
			exit(0);
		}

		core->device->CreateVertexShader(compiledVertexShader->GetBufferPointer(), compiledVertexShader->GetBufferSize(), NULL, &vertexShader);

		D3D11_INPUT_ELEMENT_DESC layoutDesc[] =
		{
			{ "POS", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 							D3D11_INPUT_PER_VERTEX_DATA, 0 },
			{ "NORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 							D3D11_INPUT_PER_VERTEX_DATA, 0 },
			{ "TANGENT", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 							D3D11_INPUT_PER_VERTEX_DATA, 0 },
			{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 							D3D11_INPUT_PER_VERTEX_DATA, 0 },
		};

		core->device->CreateInputLayout(layoutDesc, 4, compiledVertexShader->GetBufferPointer(), compiledVertexShader->GetBufferSize(), &layout);
		ConstantBufferReflection reflection;
		reflection.build(core, compiledVertexShader, vsConstantBuffers, textureBindPointsVS, ShaderStage::VertexShader);
	}

	void loadVS_Instance(DXCOre* core, std::string vertexShaderHLSL)
	{
		ID3DBlob* compiledVertexShader;
		ID3DBlob* status;
		HRESULT hr = D3DCompile(vertexShaderHLSL.c_str(), strlen(vertexShaderHLSL.c_str()), NULL, NULL, NULL, "VS", "vs_5_0", 0, 0, &compiledVertexShader, &status);
		if (FAILED(hr))
		{
			MessageBoxA(NULL, (char*)status->GetBufferPointer(), "Vertex Shader Error", 0);
			exit(0);
		}

		core->device->CreateVertexShader(compiledVertexShader->GetBufferPointer(), compiledVertexShader->GetBufferSize(), NULL, &vertexShader);

		D3D11_INPUT_ELEMENT_DESC layoutDesc[] =
		{
			{ "POS", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 							D3D11_INPUT_PER_VERTEX_DATA, 0 },
			{ "NORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 							D3D11_INPUT_PER_VERTEX_DATA, 0 },
			{ "TANGENT", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 							D3D11_INPUT_PER_VERTEX_DATA, 0 },
			{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 							D3D11_INPUT_PER_VERTEX_DATA, 0 },
			{ "INSTANCEPOSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 1, 0, 							D3D11_INPUT_PER_INSTANCE_DATA, 1 },
		};


		core->device->CreateInputLayout(layoutDesc, 5, compiledVertexShader->GetBufferPointer(), compiledVertexShader->GetBufferSize(), &layout);
		ConstantBufferReflection reflection;
		reflection.build(core, compiledVertexShader, vsConstantBuffers, textureBindPointsVS, ShaderStage::VertexShader);
	}

	void loadVS_Skeletal(DXCOre* core, std::string vertexShaderHLSL)
	{
		ID3DBlob* compiledVertexShader;
		ID3DBlob* status;
		HRESULT hr = D3DCompile(vertexShaderHLSL.c_str(), strlen(vertexShaderHLSL.c_str()), NULL, NULL, NULL, "VS", "vs_5_0", 0, 0, &compiledVertexShader, &status);
		if (FAILED(hr))
		{
			MessageBoxA(NULL, (char*)status->GetBufferPointer(), "Vertex Shader Error", 0);
			exit(0);
		}

		core->device->CreateVertexShader(compiledVertexShader->GetBufferPointer(), compiledVertexShader->GetBufferSize(), NULL, &vertexShader);

		D3D11_INPUT_ELEMENT_DESC layoutDesc[] = {
		{ "POS", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 								D3D11_INPUT_PER_VERTEX_DATA, 0 },
		{ "NORMAL", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 								D3D11_INPUT_PER_VERTEX_DATA, 0 },
		{ "TANGENT", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 								D3D11_INPUT_PER_VERTEX_DATA, 0 },
		{ "TEXCOORD", 0, DXGI_FORMAT_R32G32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 								D3D11_INPUT_PER_VERTEX_DATA, 0 },
		{ "BONEIDS", 0, DXGI_FORMAT_R32G32B32A32_UINT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 							D3D11_INPUT_PER_VERTEX_DATA, 0 },
		{ "BONEWEIGHTS", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, D3D11_APPEND_ALIGNED_ELEMENT, 							D3D11_INPUT_PER_VERTEX_DATA, 0 },
			};
		core->device->CreateInputLayout(layoutDesc, 6, compiledVertexShader->GetBufferPointer(), compiledVertexShader->GetBufferSize(), &layout);

		ConstantBufferReflection reflection;
		reflection.build(core, compiledVertexShader, vsConstantBuffers, textureBindPointsVS, ShaderStage::VertexShader);
	}

	void loadPS(DXCOre* core, std::string pixelShaderHLSL)
	{
		ID3DBlob* compiledPixelShader;
		ID3DBlob* status;
		HRESULT hr = D3DCompile(pixelShaderHLSL.c_str(), strlen(pixelShaderHLSL.c_str()), NULL, NULL, NULL, "PS", "ps_5_0", 0, 0, &compiledPixelShader, &status);
		if (FAILED(hr))
		{
			MessageBoxA(NULL, (char*)status->GetBufferPointer(), "Pixel Shader Error", 0);
			exit(0);
		}
		core->device->CreatePixelShader(compiledPixelShader->GetBufferPointer(), compiledPixelShader->GetBufferSize(), NULL, &pixelShader);
		ConstantBufferReflection reflection;
		reflection.build(core, compiledPixelShader, psConstantBuffers, textureBindPointsPS, ShaderStage::PixelShader);
	}

	void updateConstant(std::string constantBufferName, std::string variableName, void* data, std::vector<ConstantBuffer>& buffers)
	{
		for (int i = 0; i < buffers.size(); i++)
		{
			if (buffers[i].name == constantBufferName)
			{
				buffers[i].update(variableName, data);
				return;
			}
		}
	}

	void updateConstantVS(std::string constantBufferName, std::string variableName, void* data)
	{
		updateConstant(constantBufferName, variableName, data, vsConstantBuffers);
	}
	void updateConstantPS(std::string constantBufferName, std::string variableName, void* data)
	{
		updateConstant(constantBufferName, variableName, data, psConstantBuffers);
	}
	void updateTexturePS(DXCOre* core, std::string name, ID3D11ShaderResourceView* tex){
		//core->devicecontext->PSSetShaderResources(0, 1, &srv);
		core->devicecontext->PSSetShaderResources(textureBindPointsPS[name], 1, &tex);
	}
	void updateSampler(DXCOre* core, ID3D11SamplerState* state, int num) {
		core->devicecontext->PSSetSamplers(num, 1, &state);
	}
	void apply(DXCOre* core) {

		core->devicecontext->IASetInputLayout(layout);
		core->devicecontext->VSSetShader(vertexShader, NULL, 0);
		core->devicecontext->PSSetShader(pixelShader, NULL, 0);

		for (int i = 0; i < vsConstantBuffers.size(); i++) {
			vsConstantBuffers[i].upload(core);
		}
		for (int i = 0; i < psConstantBuffers.size(); i++) {
			psConstantBuffers[i].upload(core);
		}

	}
};