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_pIndexBuffer		= 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_IMMUTABLE;
    cbDesc.BindFlags = D3D10_BIND_VERTEX_BUFFER;
    cbDesc.CPUAccessFlags = 0;
    cbDesc.MiscFlags = 0;
	// 打开Vertex Buffer时同时把数据拷贝过去
	D3D10_SUBRESOURCE_DATA sbDesc;
	sbDesc.pSysMem = g_vertices;
	// 分配一块可以存放Vertex的内存, 也就是Vertex Buffer.
	if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, &sbDesc, &g_pVertexBuffer ) )
		return false;
	// 设置一块可以用来放Index的内存.
    cbDesc.ByteWidth = sizeof(g_indices);
    cbDesc.Usage = D3D10_USAGE_IMMUTABLE;
    cbDesc.BindFlags = D3D10_BIND_INDEX_BUFFER;
    cbDesc.CPUAccessFlags = 0;
    cbDesc.MiscFlags = 0;
	// 打开Index Buffer时同时把数据拷贝过去
	sbDesc.pSysMem = g_indices;
    // 分配一块可以存放Index的内存, 也就是Index Buffer.
	if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, &sbDesc, &g_pIndexBuffer ) )
		return false;
	// 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(90.0f, 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;
	// 获得调用GutCreateGraphicsDeviceDX10时所生成的D3D10对象
	ID3D10RenderTargetView *pRenderTargetView = GutGetDX10RenderTargetView(); //frame buffer
    ID3D10DepthStencilView *pDepthStencilView = GutGetDX10DepthStencilView(); //depth/stencil buffer
	IDXGISwapChain *pSwapChain = GutGetDX10SwapChain(); // front/back buffer
	// 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index buffer
	g_pDevice->IASetIndexBuffer(g_pIndexBuffer, DXGI_FORMAT_R16_UINT, 0);
    // 设置要画线
	g_pDevice->IASetPrimitiveTopology( D3D10_PRIMITIVE_TOPOLOGY_LINELIST );
	for ( int i=0; i<4; i++ )
	{
		// `创建转换矩阵`
		Matrix4x4 world_matrix; 
		world_matrix.Scale_Replace(g_scale[i]); // `创建缩放矩阵`
		world_matrix[3] = g_position[i]; // `直接把位移填入矩阵左下角.`
		Matrix4x4 world_view_proj_matrix = world_matrix * g_view_proj_matrix;
		// 设置shader参数
		Matrix4x4 *pConstData;
		g_pConstantBuffer->Map( D3D10_MAP_WRITE_DISCARD, NULL, (void **) &pConstData );
		*pConstData = world_view_proj_matrix;
		g_pConstantBuffer->Unmap();
		// 画线
		g_pDevice->DrawIndexed(16, 0, 0);
	}
	// 等待硬件扫描结束, 然后再更新画面
	pSwapChain->Present(1, 0);
}
#endif // _ENABLE_DX10_

						