/* cgfx_buffer.cpp */
#include <windows.h>
#include <stdio.h>
#include <assert.h>
#include <d3d10_1.h> /* Direct3D10 API: Can't include this? Is DirectX SDK installed? */
#include <d3d10.h> /* Direct3D10 API: Can't include this? Is DirectX SDK installed? */
#include <Cg/cg.h> /* Can't include this? Is Cg Toolkit installed? */
#include <Cg/cgD3D10.h> /* Can't include this? Is Cg Toolkit installed? */
#pragma comment(lib, "d3d10.lib")
#ifndef SAFE_RELEASE
#define SAFE_RELEASE( p ) { if( p ) { ( p )->Release(); ( p ) = NULL; } }
#endif
//--------------------------------------------------------------------------------------
// Structures
//--------------------------------------------------------------------------------------
struct Vertex3
{
float x, y, z;
};
//--------------------------------------------------------------------------------------
// Global Variables
//--------------------------------------------------------------------------------------
HINSTANCE g_hInst = NULL;
HWND g_hWnd = NULL;
D3D10_DRIVER_TYPE g_driverType = D3D10_DRIVER_TYPE_NULL;
ID3D10Device * g_pDevice = NULL;
IDXGISwapChain * g_pSwapChain = NULL;
ID3D10RenderTargetView * g_pRenderTargetView = NULL;
ID3D10InputLayout * g_pVertexLayout = NULL;
ID3D10Buffer * g_pVB = NULL;
const int Width = 400;
const int Height = 400;
float ClearColor[4] = { 0.0f, 0.0f, 1.0f, 1.0f }; // RGBA
float VertexColor[4] = { 1.0f, 0.0f, 0.0f, 1.0f };
/* Cg global variables */
CGcontext myCgContext;
CGeffect myCgEffect;
CGtechnique myCgTechnique;
CGbuffer myCgBuffer;
const TCHAR * myProgramName = L"cgfx_buffer";
const char * myCgFXFileName = "cgfx_buffer.cgfx"; // Use char here since that's what the Cg runtime expects
//--------------------------------------------------------------------------------------
// Forward declarations
//--------------------------------------------------------------------------------------
HRESULT InitWindow( HINSTANCE, int );
HRESULT InitDevice();
void CleanupDevice();
LRESULT CALLBACK WndProc( HWND, UINT, WPARAM, LPARAM );
void Render();
HRESULT InitCg();
void CleanupCg();
HRESULT CreateVertexBuffer();
//--------------------------------------------------------------------------------------
// Entry point to the program. Initializes everything and goes into a message processing
// loop. Idle time is used to render the scene.
//--------------------------------------------------------------------------------------
int WINAPI WinMain( HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow )
{
MSG msg = { 0 };
if( FAILED( InitWindow( hInstance, nCmdShow ) ) )
return 0;
if( FAILED( InitDevice() ) )
{
CleanupDevice();
return 0;
}
if( FAILED( InitCg() ) || FAILED( CreateVertexBuffer() ) )
{
CleanupDevice();
CleanupCg();
return 0;
}
// Main message loop
while( WM_QUIT != msg.message )
{
if( PeekMessage( &msg, NULL, 0, 0, PM_REMOVE ) )
{
TranslateMessage( &msg );
DispatchMessage( &msg );
}
else
{
Render();
}
}
CleanupDevice();
CleanupCg();
return (int)msg.wParam;
}
//--------------------------------------------------------------------------------------
// Register class and create window
//--------------------------------------------------------------------------------------
HRESULT InitWindow( HINSTANCE hInstance, int nCmdShow )
{
g_hInst = hInstance;
RECT rc = { 0, 0, Width, Height };
// Register class
WNDCLASSEX wcex;
wcex.cbSize = sizeof(WNDCLASSEX);
wcex.style = CS_HREDRAW | CS_VREDRAW;
wcex.lpfnWndProc = WndProc;
wcex.cbClsExtra = 0;
wcex.cbWndExtra = 0;
wcex.hInstance = hInstance;
wcex.hIcon = NULL;
wcex.hCursor = LoadCursor( NULL, IDC_ARROW );
wcex.hbrBackground = (HBRUSH)(COLOR_WINDOW + 1);
wcex.lpszMenuName = NULL;
wcex.lpszClassName = myProgramName;
wcex.hIconSm = NULL;
if( !RegisterClassEx( &wcex ) )
return E_FAIL;
// Create window
AdjustWindowRect( &rc, WS_OVERLAPPEDWINDOW, FALSE );
g_hWnd = CreateWindow( myProgramName, // Class name
myProgramName, // Window name
WS_OVERLAPPEDWINDOW, // Style
CW_USEDEFAULT, // X position
CW_USEDEFAULT, // Y position
rc.right - rc.left, // Width
rc.bottom - rc.top, // Height
NULL, // Parent HWND
NULL, // Menu
hInstance, // Instance
NULL // Param
);
if( !g_hWnd )
return E_FAIL;
ShowWindow( g_hWnd, nCmdShow );
return S_OK;
}
//--------------------------------------------------------------------------------------
// Create Direct3D device and swap chain
//--------------------------------------------------------------------------------------
HRESULT InitDevice()
{
HRESULT hr = S_OK;
RECT rc;
GetClientRect( g_hWnd, &rc );
UINT width = rc.right - rc.left;
UINT height = rc.bottom - rc.top;
UINT createDeviceFlags = 0;
#ifdef _DEBUG
createDeviceFlags |= D3D10_CREATE_DEVICE_DEBUG;
#endif
D3D10_DRIVER_TYPE driverTypes[] =
{
D3D10_DRIVER_TYPE_HARDWARE,
D3D10_DRIVER_TYPE_REFERENCE,
};
UINT numDriverTypes = sizeof( driverTypes ) / sizeof( driverTypes[0] );
DXGI_SWAP_CHAIN_DESC sd;
ZeroMemory( &sd, sizeof( sd ) );
sd.BufferCount = 1;
sd.BufferDesc.Width = width;
sd.BufferDesc.Height = height;
sd.BufferDesc.Format = DXGI_FORMAT_R8G8B8A8_UNORM;
sd.BufferDesc.RefreshRate.Numerator = 60;
sd.BufferDesc.RefreshRate.Denominator = 1;
sd.BufferUsage = DXGI_USAGE_RENDER_TARGET_OUTPUT;
sd.OutputWindow = g_hWnd;
sd.SampleDesc.Count = 1;
sd.SampleDesc.Quality = 0;
sd.Windowed = TRUE;
for( UINT driverTypeIndex = 0; driverTypeIndex < numDriverTypes; driverTypeIndex++ )
{
g_driverType = driverTypes[driverTypeIndex];
hr = D3D10CreateDeviceAndSwapChain( NULL, g_driverType, NULL, createDeviceFlags,
D3D10_SDK_VERSION, &sd, &g_pSwapChain, &g_pDevice );
if( SUCCEEDED( hr ) )
break;
}
if( FAILED(hr) )
return hr;
// Create a render target view
ID3D10Texture2D *pBuffer;
hr = g_pSwapChain->GetBuffer( 0, __uuidof( ID3D10Texture2D ), (LPVOID*)&pBuffer );
if( FAILED(hr) )
return hr;
hr = g_pDevice->CreateRenderTargetView( pBuffer, NULL, &g_pRenderTargetView );
pBuffer->Release();
if( FAILED(hr) )
return hr;
g_pDevice->OMSetRenderTargets( 1, &g_pRenderTargetView, NULL );
// Setup the viewport
D3D10_VIEWPORT vp;
vp.Width = width;
vp.Height = height;
vp.MinDepth = 0.0f;
vp.MaxDepth = 1.0f;
vp.TopLeftX = 0;
vp.TopLeftY = 0;
g_pDevice->RSSetViewports( 1, &vp );
return S_OK;
}
//--------------------------------------------------------------------------------------
// Utility function for reporting Cg errors
//--------------------------------------------------------------------------------------
static void checkForCgError( const char * situation, bool _exit = true )
{
CGerror error;
const char *string = cgGetLastErrorString(&error);
if( error != CG_NO_ERROR )
{
if( error == CG_COMPILER_ERROR )
{
fprintf(stderr,
"Program: %s\n"
"Situation: %s\n"
"Error: %s\n\n"
"Cg compiler output...\n%s",
myProgramName, situation, string,
cgGetLastListing(myCgContext));
}
else
{
fprintf(stderr,
"Program: %s\n"
"Situation: %s\n"
"Error: %s",
myProgramName, situation, string);
}
if( _exit )
exit(1);
}
}
//--------------------------------------------------------------------------------------
// Create Cg objects
//--------------------------------------------------------------------------------------
HRESULT InitCg()
{
HRESULT hr = S_OK;
myCgContext = cgCreateContext();
checkForCgError( "creating context" );
hr = cgD3D10SetDevice( myCgContext, g_pDevice );
checkForCgError( "setting Direct3D device", false );
if( hr != S_OK )
return hr;
cgD3D10RegisterStates( myCgContext );
checkForCgError( "registering standard CgFX states" );
cgD3D10SetManageTextureParameters( myCgContext, CG_TRUE );
checkForCgError( "manage texture parameters" );
char buffer[128];
myCgEffect = cgCreateEffectFromFile( myCgContext, myCgFXFileName, NULL );
sprintf_s( buffer, "creating %s effect", myCgFXFileName );
checkForCgError( buffer );
assert( myCgEffect );
myCgTechnique = cgGetFirstTechnique( myCgEffect );
while( myCgTechnique && cgValidateTechnique( myCgTechnique ) == CG_FALSE )
{
fprintf( stderr, "%s: Technique %s did not validate. Skipping.\n", myProgramName, cgGetTechniqueName( myCgTechnique ) );
myCgTechnique = cgGetNextTechnique( myCgTechnique );
}
if( myCgTechnique )
{
fprintf( stderr, "%s: Use technique %s.\n", myProgramName, cgGetTechniqueName( myCgTechnique ) );
}
else
{
fprintf( stderr, "%s: No valid technique\n", myProgramName );
return E_FAIL;
}
// Create vertex input layout
const D3D10_INPUT_ELEMENT_DESC layout[] =
{
{ "POSITION", 0, DXGI_FORMAT_R32G32B32_FLOAT, 0, 0, D3D10_INPUT_PER_VERTEX_DATA, 0 },
};
CGpass myPass = cgGetFirstPass( myCgTechnique );
ID3D10Blob * pVSBuf = cgD3D10GetIASignatureByPass( myPass );
hr = g_pDevice->CreateInputLayout( layout, 1, pVSBuf->GetBufferPointer(), pVSBuf->GetBufferSize(), &g_pVertexLayout );
if( hr != S_OK )
return E_FAIL;
// Create Cg Buffer
myCgBuffer = cgCreateBuffer( myCgContext, sizeof( float ) * 4, NULL, CG_BUFFER_USAGE_STATIC_DRAW );
CGprogram vertexProgram = cgGetPassProgram( myPass, CG_VERTEX_DOMAIN );
cgSetProgramBuffer( vertexProgram, // Cg program that uses our buffer
cgGetParameterBufferIndex( cgGetNamedParameter( vertexProgram, "CBuffer0" ) ), // Cg parameter in the buffer
myCgBuffer // The Cg buffer!
);
return S_OK;
}
//--------------------------------------------------------------------------------------
// Clean up the objects we've created
//--------------------------------------------------------------------------------------
void CleanupDevice()
{
SAFE_RELEASE( g_pVertexLayout );
SAFE_RELEASE( g_pVB );
if( g_pDevice ) g_pDevice->ClearState();
if( g_pRenderTargetView ) g_pRenderTargetView->Release();
if( g_pSwapChain ) g_pSwapChain->Release();
if( g_pDevice ) g_pDevice->Release();
}
//--------------------------------------------------------------------------------------
// Clean up the cg objects we've created
//--------------------------------------------------------------------------------------
void CleanupCg()
{
cgDestroyBuffer( myCgBuffer );
cgDestroyEffect( myCgEffect );
checkForCgError( "destroying effect" );
cgD3D10SetDevice( myCgContext, NULL );
cgDestroyContext( myCgContext );
}
//--------------------------------------------------------------------------------------
// Create vertex buffer for triangle
//--------------------------------------------------------------------------------------
HRESULT CreateVertexBuffer()
{
HRESULT hr = S_OK;
/* Initialize three vertices for rendering a triangle. */
static const Vertex3 triangleVertices[3] =
{
{ -0.8f, 0.8f, 0.0f },
{ 0.8f, 0.8f, 0.0f },
{ 0.0f, -0.8f, 0.0f }
};
D3D10_BUFFER_DESC vbDesc;
vbDesc.ByteWidth = 3 * sizeof( Vertex3 );
vbDesc.Usage = D3D10_USAGE_DEFAULT;
vbDesc.BindFlags = D3D10_BIND_VERTEX_BUFFER;
vbDesc.CPUAccessFlags = 0;
vbDesc.MiscFlags = 0;
D3D10_SUBRESOURCE_DATA vbInitData;
ZeroMemory( &vbInitData, sizeof( D3D10_SUBRESOURCE_DATA ) );
vbInitData.pSysMem = triangleVertices;
hr = g_pDevice->CreateBuffer( &vbDesc, &vbInitData, &g_pVB );
if( hr != S_OK )
return hr;
return S_OK;
}
//--------------------------------------------------------------------------------------
// Render a frame
//--------------------------------------------------------------------------------------
void Render()
{
CGpass pass;
UINT strides[1] = { sizeof( Vertex3 ) };
UINT offsets[1] = { 0 };
ID3D10Buffer * pBuffers[1] = { g_pVB };
// Clear the back buffer
g_pDevice->ClearRenderTargetView( g_pRenderTargetView, ClearColor );
g_pDevice->IASetVertexBuffers( 0, 1, pBuffers, strides, offsets );
g_pDevice->IASetInputLayout( g_pVertexLayout );
g_pDevice->IASetPrimitiveTopology( D3D10_PRIMITIVE_TOPOLOGY_TRIANGLELIST );
cgSetBufferData( myCgBuffer, sizeof( float ) * 4, &VertexColor );
pass = cgGetFirstPass( myCgTechnique );
while( pass )
{
cgSetPassState( pass );
g_pDevice->Draw( 3, 0 );
cgResetPassState( pass );
pass = cgGetNextPass( pass );
}
g_pSwapChain->Present( 0, 0 );
}
//--------------------------------------------------------------------------------------
// Called every time the application receives a message
//--------------------------------------------------------------------------------------
LRESULT CALLBACK WndProc( HWND hWnd, UINT message, WPARAM wParam, LPARAM lParam )
{
switch( message )
{
case WM_KEYDOWN:
switch( wParam )
{
case VK_ESCAPE:
PostQuitMessage( 0 );
break;
}
break;
case WM_DESTROY:
PostQuitMessage( 0 );
break;
default:
return DefWindowProc( hWnd, message, wParam, lParam );
}
return 0;
}
