OpenGL program

Development Platform:
Visual C++

render_dx10.cpp：Code Content
							#ifdef _ENABLE_DX10_
#include "Gut.h"
#include "render_data.h"
static ID3D10Device			*g_pDevice = NULL;
static ID3D10InputLayout	*g_pVertexLayout = NULL;
static ID3D10Buffer			*g_pVertexBuffer = NULL;
static ID3D10Buffer			*g_pConstantBuffer = NULL;
static ID3D10VertexShader	*g_pVertexShader = NULL;
static ID3D10PixelShader	*g_pPixelShader = NULL;
static Matrix4x4 g_view_proj_matrix;
bool InitResourceDX10(void)
{
	g_pDevice = GutGetGraphicsDeviceDX10();
	ID3D10Blob *pVSCode = NULL;
	// `载入Vertex Shader`
	g_pVertexShader = GutLoadVertexShaderDX10_HLSL("../../shaders/vertex_transform_dx10.shader", "VS", "vs_4_0", &pVSCode);
	if ( NULL==g_pVertexShader )
		return false;
	// `载入Pixel Shader`
	g_pPixelShader = GutLoadPixelShaderDX10_HLSL("../../shaders/vertex_transform_dx10.shader", "PS", "ps_4_0");
	if ( NULL==g_pPixelShader )
		return false;
    // `设置Vertex数据格式`
    D3D10_INPUT_ELEMENT_DESC layout[] =
	{
		{ "POSITION", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 0,  D3D10_INPUT_PER_VERTEX_DATA, 0 },
	};
    if ( D3D_OK != g_pDevice->CreateInputLayout( layout, 1, pVSCode->GetBufferPointer(), pVSCode->GetBufferSize(), &g_pVertexLayout ) )
		return false;
	SAFE_RELEASE(pVSCode);
	// `设置一块可以用来放Vertex的内存.`
    D3D10_BUFFER_DESC cbDesc;
    cbDesc.ByteWidth = sizeof(g_vertices);
    cbDesc.Usage = D3D10_USAGE_DYNAMIC;
    cbDesc.BindFlags = D3D10_BIND_VERTEX_BUFFER;
    cbDesc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
    cbDesc.MiscFlags = 0;
    // `分配一块可以存放Vertex的内存, 也就是Vertex Buffer.`
	if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, NULL, &g_pVertexBuffer ) )
		return false;
	
    // `把数据拷贝到显示适配器内存的Vertex Buffer`
    Vector4 *pVertexBuffer;
    g_pVertexBuffer->Map( D3D10_MAP_WRITE_DISCARD, NULL, (void **) &pVertexBuffer );
	memcpy(pVertexBuffer, g_vertices, sizeof(g_vertices));
	g_pVertexBuffer->Unmap();
    // `分配Shader读取参数的内存空间`
    cbDesc.ByteWidth = sizeof(Matrix4x4);
    cbDesc.Usage = D3D10_USAGE_DYNAMIC;
    cbDesc.BindFlags = D3D10_BIND_CONSTANT_BUFFER;
    cbDesc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
    cbDesc.MiscFlags = 0;
	if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, NULL, &g_pConstantBuffer ) )
		return false;
	
	// `计算出一个可以转换到镜头坐标系的矩阵`
	Matrix4x4 view_matrix = GutMatrixLookAtRH(g_eye, g_lookat, g_up);
	Matrix4x4 projection_matrix = GutMatrixPerspectiveRH_DirectX(60.0f, 1.0f, 1.0f, 100.0f);
	g_view_proj_matrix = view_matrix * projection_matrix;
	return true;
}
bool ReleaseResourceDX10(void)
{
 	SAFE_RELEASE(g_pVertexLayout);
 	SAFE_RELEASE(g_pVertexBuffer);
 	SAFE_RELEASE(g_pConstantBuffer);
 	SAFE_RELEASE(g_pVertexShader);
 	SAFE_RELEASE(g_pPixelShader);
	return true;
}
void RenderFrameDX10(void)
{
	Vector4 vClearColor(0.0f, 0.0f, 0.0f, 0.0f);
	UINT stride = sizeof(Vector4);
	UINT offset = 0;
	Matrix4x4 world_view_proj_matrix;
	Matrix4x4 world_matrix;
    Matrix4x4 *pConstData;
	// `获得调用GutCreateGraphicsDeviceDX10时所生成的D3D10对象`
	//frame buffer
	ID3D10RenderTargetView *pRenderTargetView = GutGetDX10RenderTargetView(); 
	//depth/stencil buffer
    ID3D10DepthStencilView *pDepthStencilView = GutGetDX10DepthStencilView(); 
	// front/back buffer
	IDXGISwapChain *pSwapChain = GutGetDX10SwapChain(); 
	// `清除颜色`
	g_pDevice->ClearRenderTargetView(pRenderTargetView, (float *)&vClearColor);
	// `清除Depth/Stencil buffer`
	g_pDevice->ClearDepthStencilView(pDepthStencilView, D3D10_CLEAR_DEPTH | D3D10_CLEAR_STENCIL, 1.0f, 0);
	// `设置vertex shader`
	g_pDevice->VSSetShader(g_pVertexShader);
	// `设置pixel shader`
	g_pDevice->PSSetShader(g_pPixelShader);
	// `设置vertex shader读取参数的内存位罝`
    g_pDevice->VSSetConstantBuffers(0, 1, &g_pConstantBuffer);
	// `设置vertex数据格式`
	g_pDevice->IASetInputLayout(g_pVertexLayout);
	// `设置vertex buffer`
	g_pDevice->IASetVertexBuffers(0, 1, &g_pVertexBuffer, &stride, &offset);
    // `设置要画线`
	g_pDevice->IASetPrimitiveTopology( D3D10_PRIMITIVE_TOPOLOGY_LINELIST );
	// `4个金字塔的位置`
	Vector4 pos[4] = 
	{
		Vector4(-1.0f, -1.0f, 0.0f),
		Vector4( 1.0f, -1.0f, 0.0f),
		Vector4(-1.0f,  1.0f, 0.0f),
		Vector4( 1.0f,  1.0f, 0.0f),
	};
	for ( int i=0; i<4; i++ )
	{
		// `设置转换矩阵`
		world_matrix.Translate_Replace(pos[i]);
		world_view_proj_matrix = world_matrix * g_view_proj_matrix;
		
		// `设置shader参数`
		g_pConstantBuffer->Map( D3D10_MAP_WRITE_DISCARD, NULL, (void **) &pConstData );
		*pConstData = world_view_proj_matrix;
		g_pConstantBuffer->Unmap();
		// `画线`
		g_pDevice->Draw(16, 0);
	}
	// `更新画面`
	pSwapChain->Present(0, 0);
}
#endif // _ENABLE_DX10_

						