//filename d3dclass.cpp
#include "d3dclass.h"
D3DClass::D3DClass()
{
m_swapChain = 0;
m_device = 0;
m_deviceContext = 0;
m_renderTargetView = 0;
m_depthStencilBuffer = 0;
m_depthStencilState = 0;
m_depthStencilView = 0;
m_rasterState = 0;
m_depthDisabledStencilState = 0;
m_alphaDisableBlendingState = 0;
m_alphaEnableBlendingState = 0;
}
D3DClass::D3DClass(const D3DClass& other)
{
}
D3DClass::~D3DClass()
{
}
bool D3DClass::Initialize(int screenWidth, int screenHeight, bool vsync, HWND hwnd, bool fullscreen,
float screenDepth, float screenNear)
{
HRESULT result;
IDXGIFactory* factory;
IDXGIAdapter* adapter;
IDXGIOutput* adapterOutput;
unsigned int numModes, i, numerator, denominator, stringLength;
DXGI_MODE_DESC* displayModeList;
DXGI_ADAPTER_DESC adapterDesc;
int error;
DXGI_SWAP_CHAIN_DESC swapChainDesc;
D3D_FEATURE_LEVEL featureLevel;
ID3D11Texture2D* backBufferPtr;
D3D11_TEXTURE2D_DESC depthBufferDesc;
D3D11_DEPTH_STENCIL_DESC depthStencilDesc;
D3D11_DEPTH_STENCIL_VIEW_DESC depthStencilViewDesc;
D3D11_RASTERIZER_DESC rasterDesc;
D3D11_VIEWPORT viewport;
float fieldOfView, screenAspect;
D3D11_DEPTH_STENCIL_DESC depthDisabledStencilDesc;
D3D11_BLEND_DESC blendStateDescription;
//store the vsync setting
m_vsync_enabled = vsync;
//Create a directx graphics interface factory
result = CreateDXGIFactory(__uuidof(IDXGIFactory), (void**)&factory);
if(FAILED(result))
{
return false;
}
//use the factory to create an adapter for the primary graphics
//interface (video card).
result = factory->EnumAdapters(0, &adapter);
if(FAILED(result))
{
return false;
}
//enum the primary adapter output (monitor)
result = adapter->EnumOutputs(0, &adapterOutput);
if(FAILED(result))
{
return false;
}
//get the number of modes that fit the
//DXGI_FORMAT_R8G8B8A8_UNORM display format for the adapter output
result = adapterOutput->GetDisplayModeList(DXGI_FORMAT_R8G8B8A8_UNORM, DXGI_ENUM_MODES_INTERLACED, &numModes, NULL);
if(FAILED(result))
{
return false;
}
//create a list to hold all the possible display modes for this monitor/video card combo
displayModeList = new DXGI_MODE_DESC[numModes];
if(!displayModeList)
{
return false;
}
//now fill the adapter mode list structures
result = adapterOutput->GetDisplayModeList(DXGI_FORMAT_R8G8B8A8_UNORM,
DXGI_ENUM_MODES_INTERLACED, &numModes, displayModeList);
if(FAILED(result))
{
return false;
}
//now go through all the display modes and find the one that matches
//the screen h/w when a match is found store the numerator
//and deniminator of the refresh rate for that monitor
for(i=0; i<numModes; i++)
{
if(displayModeList[i].Width == (unsigned int)screenWidth)
{
if(displayModeList[i].Height == (unsigned int)screenHeight)
{
numerator = displayModeList[i].RefreshRate.Numerator;
denominator = displayModeList[i].RefreshRate.Denominator;
}
}
}
//get the adapter(video card) desc
result = adapter->GetDesc(&adapterDesc);
if(FAILED(result))
{
return false;
}
//store the dedicated video card memory in megabytes
m_videoCardMemory = (int)(adapterDesc.DedicatedVideoMemory /1024 / 1024);
//convert the name of the video card to a character array and store it
error = wcstombs_s(&stringLength, m_videoCardDescription, 128, adapterDesc.Description, 128);
if(error != 0)
{
return false;
}
////release the display mode list
delete[] displayModeList;
displayModeList = 0;
//release the adapter output
adapterOutput->Release();
adapterOutput = 0;
//release the adapter
adapter->Release();
adapter = 0;
//release the factory
factory->Release();
factory = 0;
//Ini the swapchain desc
ZeroMemory(&swapChainDesc, sizeof(swapChainDesc));
//set to a single back buffer
swapChainDesc.BufferCount = 1;
//st the width and height of the back buffer
swapChainDesc.BufferDesc.Width = screenWidth;
swapChainDesc.BufferDesc.Height = screenHeight;
//set the reg 32-bit surface for the back buffer
swapChainDesc.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
//set the refresh rate of the back buffer
if(m_vsync_enabled)
{
swapChainDesc.BufferDesc.RefreshRate.Numerator = numerator;
swapChainDesc.BufferDesc.RefreshRate.Denominator = denominator;
}
else
{
swapChainDesc.BufferDesc.RefreshRate.Numerator = 0;
swapChainDesc.BufferDesc.RefreshRate.Denominator = 1;
}
//set the usage of the back buffer
swapChainDesc.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
//set the handle for the window to render to
swapChainDesc.OutputWindow = hwnd;
//turn multisampling off
swapChainDesc.SampleDesc.Count = 1;
swapChainDesc.SampleDesc.Quality = 0;
//set to full screen or windowed mode
if(fullscreen)
{
swapChainDesc.Windowed = false;
}
else
{
swapChainDesc.Windowed = true;
}
//set the scan line ordering and scaling to unspecified
swapChainDesc.BufferDesc.ScanlineOrdering = DXGI_MODE_SCANLINE_ORDER_UNSPECIFIED;
swapChainDesc.BufferDesc.Scaling = DXGI_MODE_SCALING_UNSPECIFIED;
//discard the back buffer contexts after presenting
swapChainDesc.SwapEffect = DXGI_SWAP_EFFECT_DISCARD;
//dont set the advanced flags
swapChainDesc.Flags = 0;
//set the feature level to DX 11
featureLevel = D3D_FEATURE_LEVEL_11_0;
//create the swapchain, D3Ddevice and d3d device context
result = D3D11CreateDeviceAndSwapChain(NULL, D3D_DRIVER_TYPE_HARDWARE, NULL, 0, &featureLevel,
1, D3D11_SDK_VERSION, &swapChainDesc, &m_swapChain, &m_device, NULL, &m_deviceContext);
if(FAILED(result))
{
return false;
}
//get the pointer to the back buffer
result = m_swapChain->GetBuffer(0, __uuidof(ID3D11Texture2D), (LPVOID*)&backBufferPtr);
if(FAILED(result))
{
return false;
}
//create the render target view with the back buffer pointer
result = m_device->CreateRenderTargetView(backBufferPtr, NULL, &m_renderTargetView);
if(FAILED(result))
{
return false;
}
//release the pointer to the back buffer as we no longer need it
backBufferPtr->Release();
backBufferPtr = 0;
ZeroMemory(&depthBufferDesc, sizeof(depthBufferDesc));
//set up the desc of th depth buffer
depthBufferDesc.Width = screenWidth;
depthBufferDesc.Height = screenHeight;
depthBufferDesc.MipLevels = 1;
depthBufferDesc.ArraySize = 1;
depthBufferDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
depthBufferDesc.SampleDesc.Count = 1;
depthBufferDesc.SampleDesc.Quality = 0;
depthBufferDesc.Usage = D3D11_USAGE_DEFAULT;
depthBufferDesc.BindFlags = D3D11_BIND_DEPTH_STENCIL;
depthBufferDesc.CPUAccessFlags = 0;
depthBufferDesc.MiscFlags = 0;
//create the texture for the depth buffer using the filled out desc
result = m_device->CreateTexture2D(&depthBufferDesc, NULL, &m_depthStencilBuffer);
if(FAILED(result))
{
return false;
}
// Initialize the description of the stencil state.
ZeroMemory(&depthStencilDesc, sizeof(depthStencilDesc));
// Set up the description of the stencil state.
depthStencilDesc.DepthEnable = true;
depthStencilDesc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL;
depthStencilDesc.DepthFunc = D3D11_COMPARISON_LESS;
depthStencilDesc.StencilEnable = true;
depthStencilDesc.StencilReadMask = 0xFF;
depthStencilDesc.StencilWriteMask = 0xFF;
// Stencil operations if pixel is front-facing.
depthStencilDesc.FrontFace.StencilFailOp = D3D11_STENCIL_OP_KEEP;
depthStencilDesc.FrontFace.StencilDepthFailOp = D3D11_STENCIL_OP_INCR;
depthStencilDesc.FrontFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
depthStencilDesc.FrontFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
// Stencil operations if pixel is back-facing.
depthStencilDesc.BackFace.StencilFailOp = D3D11_STENCIL_OP_KEEP;
depthStencilDesc.BackFace.StencilDepthFailOp = D3D11_STENCIL_OP_DECR;
depthStencilDesc.BackFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
depthStencilDesc.BackFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
// Create the depth stencil state.
result = m_device->CreateDepthStencilState(&depthStencilDesc, &m_depthStencilState);
if(FAILED(result))
{
return false;
}
// Set the depth stencil state.
m_deviceContext->OMSetDepthStencilState(m_depthStencilState, 1);
// Initailze the depth stencil view.
ZeroMemory(&depthStencilViewDesc, sizeof(depthStencilViewDesc));
// Set up the depth stencil view description.
depthStencilViewDesc.Format = DXGI_FORMAT_D24_UNORM_S8_UINT;
depthStencilViewDesc.ViewDimension = D3D11_DSV_DIMENSION_TEXTURE2D;
depthStencilViewDesc.Texture2D.MipSlice = 0;
// Create the depth stencil view.
result = m_device->CreateDepthStencilView(m_depthStencilBuffer, &depthStencilViewDesc, &m_depthStencilView);
if(FAILED(result))
{
return false;
}
// Bind the render target view and depth stencil buffer to the output render pipeline.
m_deviceContext->OMSetRenderTargets(1, &m_renderTargetView, m_depthStencilView);
// Setup the raster description which will determine how and what polygons will be drawn.
rasterDesc.AntialiasedLineEnable = false;
rasterDesc.CullMode = D3D11_CULL_BACK;
rasterDesc.DepthBias = 0;
rasterDesc.DepthBiasClamp = 0.0f;
rasterDesc.DepthClipEnable = true;
rasterDesc.FillMode = D3D11_FILL_SOLID;
rasterDesc.FrontCounterClockwise = false;
rasterDesc.MultisampleEnable = false;
rasterDesc.ScissorEnable = false;
rasterDesc.SlopeScaledDepthBias = 0.0f;
// Create the rasterizer state from the description we just filled out.
result = m_device->CreateRasterizerState(&rasterDesc, &m_rasterState);
if(FAILED(result))
{
return false;
}
// Now set the rasterizer state.
m_deviceContext->RSSetState(m_rasterState);
// Setup the viewport for rendering.
viewport.Width = (float)screenWidth;
viewport.Height = (float)screenHeight;
viewport.MinDepth = 0.0f;
viewport.MaxDepth = 1.0f;
viewport.TopLeftX = 0.0f;
viewport.TopLeftY = 0.0f;
// Create the viewport.
m_deviceContext->RSSetViewports(1, &viewport);
// Setup the projection matrix.
fieldOfView = (float)D3DX_PI / 4.0f;
screenAspect = (float)screenWidth / (float)screenHeight;
// Create the projection matrix for 3D rendering.
D3DXMatrixPerspectiveFovLH(&m_projectionMatrix, fieldOfView, screenAspect, screenNear, screenDepth);
// Initialize the world matrix to the identity matrix.
D3DXMatrixIdentity(&m_worldMatrix);
// Create an orthographic projection matrix for 2D rendering.
D3DXMatrixOrthoLH(&m_orthoMatrix, (float)screenWidth, (float)screenHeight, screenNear, screenDepth);
//clear the second depth stencil state
ZeroMemory(&depthDisabledStencilDesc, sizeof(depthDisabledStencilDesc));
//now create a second depth stencil state which turns off the Z buffer for 2d rendering
//the only difference is that depthenable is set to false
depthDisabledStencilDesc.DepthEnable = false;
depthDisabledStencilDesc.DepthWriteMask = D3D11_DEPTH_WRITE_MASK_ALL;
depthDisabledStencilDesc.DepthFunc = D3D11_COMPARISON_LESS;
depthDisabledStencilDesc.StencilEnable = true;
depthDisabledStencilDesc.StencilReadMask = 0xFF;
depthDisabledStencilDesc.StencilWriteMask = 0xFF;
depthDisabledStencilDesc.FrontFace.StencilFailOp = D3D11_STENCIL_OP_KEEP;
depthDisabledStencilDesc.FrontFace.StencilDepthFailOp = D3D11_STENCIL_OP_INCR;
depthDisabledStencilDesc.FrontFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
depthDisabledStencilDesc.FrontFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
depthDisabledStencilDesc.BackFace.StencilFailOp = D3D11_STENCIL_OP_KEEP;
depthDisabledStencilDesc.BackFace.StencilDepthFailOp = D3D11_STENCIL_OP_DECR;
depthDisabledStencilDesc.BackFace.StencilPassOp = D3D11_STENCIL_OP_KEEP;
depthDisabledStencilDesc.BackFace.StencilFunc = D3D11_COMPARISON_ALWAYS;
//create the state using the device
result = m_device->CreateDepthStencilState(&depthDisabledStencilDesc, &m_depthDisabledStencilState);
if(FAILED(result))
{
return false;
}
//clear the blend state desc
ZeroMemory(&blendStateDescription, sizeof(D3D11_BLEND_DESC));
// Create an alpha enabled blend state description.
blendStateDescription.RenderTarget[0].BlendEnable = TRUE;
blendStateDescription.RenderTarget[0].SrcBlend = D3D11_BLEND_ONE;
blendStateDescription.RenderTarget[0].DestBlend = D3D11_BLEND_INV_SRC_ALPHA;
blendStateDescription.RenderTarget[0].BlendOp = D3D11_BLEND_OP_ADD;
blendStateDescription.RenderTarget[0].SrcBlendAlpha = D3D11_BLEND_ONE;
blendStateDescription.RenderTarget[0].DestBlendAlpha = D3D11_BLEND_ZERO;
blendStateDescription.RenderTarget[0].BlendOpAlpha = D3D11_BLEND_OP_ADD;
blendStateDescription.RenderTarget[0].RenderTargetWriteMask = 0x0f;
//create the blend state using the desc
result = m_device->CreateBlendState(&blendStateDescription, &m_alphaEnableBlendingState);
if(FAILED(result))
{
return false;
}
//modify the dfesc to create an alpha disabled blend state desc
blendStateDescription.RenderTarget[0].BlendEnable = FALSE;
//create the blend state using the desc
result = m_device->CreateBlendState(&blendStateDescription, &m_alphaDisableBlendingState);
if(FAILED(result))
{
return false;
}
return true;
}
void D3DClass::Shutdown()
{
// Before shutting down set to windowed mode or when you release the swap chain it will throw an exception.
if(m_swapChain)
{
m_swapChain->SetFullscreenState(false, NULL);
}
if(m_alphaEnableBlendingState)
{
m_alphaEnableBlendingState->Release();
m_alphaEnableBlendingState = 0;
}
if(m_alphaDisableBlendingState)
{
m_alphaDisableBlendingState->Release();
m_alphaDisableBlendingState = 0;
}
if(m_rasterState)
{
m_rasterState->Release();
m_rasterState = 0;
}
if(m_depthStencilView)
{
m_depthStencilView->Release();
m_depthStencilView = 0;
}
if(m_depthDisabledStencilState)
{
m_depthDisabledStencilState->Release();
m_depthDisabledStencilState = 0;
}
if(m_depthStencilState)
{
m_depthStencilState->Release();
m_depthStencilState = 0;
}
if(m_depthStencilBuffer)
{
m_depthStencilBuffer->Release();
m_depthStencilBuffer = 0;
}
if(m_renderTargetView)
{
m_renderTargetView->Release();
m_renderTargetView = 0;
}
if(m_deviceContext)
{
m_deviceContext->Release();
m_deviceContext = 0;
}
if(m_device)
{
m_device->Release();
m_device = 0;
}
if(m_swapChain)
{
m_swapChain->Release();
m_swapChain = 0;
}
return;
}
void D3DClass::BeginScene(float red, float green, float blue, float alpha)
{
float color[4];
//setup the color to clear the buffer to
color[0] = red;
color[1] = green;
color[2] = blue;
color[3] = alpha;
// Clear the back buffer.
m_deviceContext->ClearRenderTargetView(m_renderTargetView, color);
// Clear the depth buffer.
m_deviceContext->ClearDepthStencilView(m_depthStencilView, D3D11_CLEAR_DEPTH, 1.0f, 0);
return;
}
void D3DClass::EndScene()
{
// Present the back buffer to the screen since rendering is complete.
if(m_vsync_enabled)
{
// Lock to screen refresh rate.
m_swapChain->Present(1, 0);
}
else
{
// Present as fast as possible.
m_swapChain->Present(0, 0);
}
return;
}
ID3D11Device* D3DClass::GetDevice()
{
return m_device;
}
ID3D11DeviceContext* D3DClass::GetDeviceContext()
{
return m_deviceContext;
}
void D3DClass::GetProjectionMatrix(D3DXMATRIX& projectionMatrix)
{
projectionMatrix = m_projectionMatrix;
return;
}
void D3DClass::GetWorldMatrix(D3DXMATRIX& worldMatrix)
{
worldMatrix = m_worldMatrix;
return;
}
void D3DClass::GetOrthoMatrix(D3DXMATRIX& orthoMatrix)
{
orthoMatrix = m_orthoMatrix;
return;
}
void D3DClass::GetVideoCardInfo(char* cardName, int& memory)
{
strcpy_s(cardName, 128, m_videoCardDescription);
memory = m_videoCardMemory;
return;
}
void D3DClass::TurnZBufferOn()
{
m_deviceContext->OMSetDepthStencilState(m_depthStencilState ,1);
return;
}
void D3DClass::TurnZBufferOff()
{
m_deviceContext->OMSetDepthStencilState(m_depthDisabledStencilState, 1);
return;
}
void D3DClass::TurnOnAlphaBlending()
{
float blendFactor[4];
// Setup the blend factor.
blendFactor[0] = 0.0f;
blendFactor[1] = 0.0f;
blendFactor[2] = 0.0f;
blendFactor[3] = 0.0f;
// Turn on the alpha blending.
m_deviceContext->OMSetBlendState(m_alphaEnableBlendingState, blendFactor, 0xffffffff);
return;
}
void D3DClass::TurnOffAlphaBlending()
{
float blendFactor[4];
// Setup the blend factor.
blendFactor[0] = 0.0f;
blendFactor[1] = 0.0f;
blendFactor[2] = 0.0f;
blendFactor[3] = 0.0f;
// Turn off the alpha blending.
m_deviceContext->OMSetBlendState(m_alphaDisableBlendingState, blendFactor, 0xffffffff);
return;
}