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render_dx10.cpp
资源名称：chap02.rar　[点击查看]
上传用户：btjssb159
上传日期：2022-07-13
资源大小：107k
文件大小：4k
源码类别：

3D图形编程

开发平台：

Visual C++

render_dx10.cpp：源码内容
  1. #ifdef _ENABLE_DX10_
  3. #include "Gut.h"
  4. #include "render_data.h"
  6. static ID3D10Device *g_pDevice = NULL;
  7. static ID3D10InputLayout *g_pVertexLayout = NULL;
  8. static ID3D10Buffer *g_pVertexBuffer = NULL;
  9. static ID3D10Buffer *g_pConstantBuffer = NULL;
  10. static ID3D10VertexShader *g_pVertexShader = NULL;
  11. static ID3D10PixelShader *g_pPixelShader = NULL;
  13. bool InitResourceDX10(void)
  14. {
  15. g_pDevice = GutGetGraphicsDeviceDX10();
  16. ID3D10Blob *pVSCode = NULL;
  18. // `载入Vertex Shader.`
  19. g_pVertexShader = GutLoadVertexShaderDX10_HLSL("../../shaders/vertex_transform_dx10.shader", "VS", "vs_4_0", &pVSCode);
  20. if ( NULL==g_pVertexShader )
  21. return false;
  22. // `载入Pixel Shader.`
  23. g_pPixelShader = GutLoadPixelShaderDX10_HLSL("../../shaders/vertex_transform_dx10.shader", "PS", "ps_4_0");
  24. if ( NULL==g_pPixelShader )
  25. return false;
  27. // `设置Vertex数据格式.`
  28. D3D10_INPUT_ELEMENT_DESC layout[] =
  29. {
  30. { "POSITION", 0, DXGI_FORMAT_R32G32B32A32_FLOAT, 0, 0,  D3D10_INPUT_PER_VERTEX_DATA, 0 },
  31. };
  33. if ( D3D_OK != g_pDevice->CreateInputLayout( layout, 1, pVSCode->GetBufferPointer(), pVSCode->GetBufferSize(), &g_pVertexLayout ) )
  34. return false;
  36. SAFE_RELEASE(pVSCode);
  38. // `设置一块可以用来放Vertex的内存.`
  39. D3D10_BUFFER_DESC cbDesc;
  40. cbDesc.ByteWidth = sizeof(g_vertices);
  41. cbDesc.Usage = D3D10_USAGE_DYNAMIC;
  42. cbDesc.BindFlags = D3D10_BIND_VERTEX_BUFFER;
  43. cbDesc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
  44. cbDesc.MiscFlags = 0;
  46. // `分配一块可以存放Vertex的内存, 也就是Vertex Buffer.`
  47. if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, NULL, &g_pVertexBuffer ) )
  48. return false;
  50. // `把数据拷贝到显示适配器内存的Vertex Buffer.`
  51. Vector4 *pVertexBuffer;
  52. g_pVertexBuffer->Map( D3D10_MAP_WRITE_DISCARD, NULL, (void **) &pVertexBuffer );
  53. memcpy(pVertexBuffer, g_vertices, sizeof(g_vertices));
  54. g_pVertexBuffer->Unmap();
  56. // `分配Shader读取参数的内存空间.`
  57. cbDesc.ByteWidth = sizeof(Matrix4x4);
  58. cbDesc.Usage = D3D10_USAGE_DYNAMIC;
  59. cbDesc.BindFlags = D3D10_BIND_CONSTANT_BUFFER;
  60. cbDesc.CPUAccessFlags = D3D10_CPU_ACCESS_WRITE;
  61. cbDesc.MiscFlags = 0;
  62. if ( D3D_OK != g_pDevice->CreateBuffer( &cbDesc, NULL, &g_pConstantBuffer ) )
  63. return false;
  65. // `计算出一个可以转换到镜头坐标系的矩阵.`
  66. Matrix4x4 view_matrix = GutMatrixLookAtRH(g_eye, g_lookat, g_up);
  67. Matrix4x4 projection_matrix = GutMatrixPerspectiveRH_DirectX(90.0f, 1.0f, 1.0f, 100.0f);
  68. Matrix4x4 view_projection_matrix = view_matrix * projection_matrix;
  70. // `把矩阵拷贝到shader参数区的内存空间.`
  71. Matrix4x4 *pConstData;
  72. g_pConstantBuffer->Map( D3D10_MAP_WRITE_DISCARD, NULL, (void **) &pConstData );
  73. *pConstData = view_projection_matrix;
  74. g_pConstantBuffer->Unmap();
  76. return true;
  77. }
  79. bool ReleaseResourceDX10(void)
  80. {
  81.   SAFE_RELEASE(g_pVertexLayout);
  82.   SAFE_RELEASE(g_pVertexBuffer);
  83.   SAFE_RELEASE(g_pConstantBuffer);
  84.   SAFE_RELEASE(g_pVertexShader);
  85.   SAFE_RELEASE(g_pPixelShader);
  87. return true;
  88. }
  90. void RenderFrameDX10(void)
  91. {
  92. Vector4 vClearColor(0.0f, 0.0f, 0.0f, 0.0f);
  93. UINT stride = sizeof(Vector4);
  94. UINT offset = 0;
  96. // `获得调用GutCreateGraphicsDeviceDX10时所生成的D3D10对象`
  97. ID3D10RenderTargetView *pRenderTargetView = GutGetDX10RenderTargetView(); //frame buffer
  98. ID3D10DepthStencilView *pDepthStencilView = GutGetDX10DepthStencilView(); //depth/stencil buffer
  99. IDXGISwapChain *pSwapChain = GutGetDX10SwapChain(); // front/back buffer
  101. // `清除颜色`
  102. g_pDevice->ClearRenderTargetView(pRenderTargetView, (float *)&vClearColor);
  103. // `清除Depth/Stencil buffer`
  104. g_pDevice->ClearDepthStencilView(pDepthStencilView, D3D10_CLEAR_DEPTH | D3D10_CLEAR_STENCIL, 1.0f, 0);
  105. // `设置vertex shader`
  106. g_pDevice->VSSetShader(g_pVertexShader);
  107. // `设置pixel shader`
  108. g_pDevice->PSSetShader(g_pPixelShader);
  109. // `设置vertex shader读取参数的内存位罝`
  110. g_pDevice->VSSetConstantBuffers(0, 1, &g_pConstantBuffer);
  111. // `设置vertex数据格式`
  112. g_pDevice->IASetInputLayout(g_pVertexLayout);
  113. // `设置vertex buffer`
  114. g_pDevice->IASetVertexBuffers(0, 1, &g_pVertexBuffer, &stride, &offset);
  115.            // `设置要画线`
  116. g_pDevice->IASetPrimitiveTopology( D3D10_PRIMITIVE_TOPOLOGY_LINELIST );
  117. // `画线`
  118. g_pDevice->Draw(16, 0);
  119. // `更新画面`
  120. pSwapChain->Present(0, 0);
  121. }
  123. #endif // _ENABLE_DX10_