1 bool HGE_Impl::_init_lost()
2 {
3 CRenderTargetList *target=pTargets;
4
5 // Store render target
6 //屏幕表面
7 pScreenSurf=0;
8 //屏幕深度
9 pScreenDepth=0;
10
11 pD3DDevice->GetRenderTarget(&pScreenSurf); //取渲染目标表面，这个函数在DX9有些变化
12 pD3DDevice->GetDepthStencilSurface(&pScreenDepth); //取屏幕深度
13 //当存在渲染目标时
14 while(target)
15 {
16 //如果目标纹理存在，则重新创建纹理
17 if(target->pTex)
18 D3DXCreateTexture(pD3DDevice, target->width, target->height, 1, D3DUSAGE_RENDERTARGET,
19 d3dpp->BackBufferFormat, D3DPOOL_DEFAULT, &target->pTex);
20 //如果深度存在，则重新创建深度表面
21 if(target->pDepth)
22 pD3DDevice->CreateDepthStencilSurface(target->width, target->height,
23 D3DFMT_D16, D3DMULTISAMPLE_NONE, &target->pDepth);
24 target=target->next;
25 }
26
27 // Create Vertex buffer
28 //创建顶点缓存
29 if( FAILED (pD3DDevice->CreateVertexBuffer(VERTEX_BUFFER_SIZE*sizeof(hgeVertex),
30 D3DUSAGE_WRITEONLY,
31 D3DFVF_HGEVERTEX,
32 D3DPOOL_DEFAULT, &pVB )))
33 {
34 _PostError("Can't create D3D vertex buffer");
35 return false;
36 }
37 //设置顶点格式，在Dx9中，将DX8的这个函数SetVertexShader分成了SetVertexShader和SetFVF
38 //在DX9中，我们只需要使用SetFVF就可以设置顶点格式了
39 pD3DDevice->SetVertexShader( D3DFVF_HGEVERTEX );
40 //把一个顶点缓存绑定到一个设备数据流
41 pD3DDevice->SetStreamSource( 0, pVB, sizeof(hgeVertex) );
42
43 // Create and setup Index buffer
44 //创建索引缓存
45 if( FAILED( pD3DDevice->CreateIndexBuffer(VERTEX_BUFFER_SIZE*6/4*sizeof(WORD),
46 D3DUSAGE_WRITEONLY,
47 D3DFMT_INDEX16,
48 D3DPOOL_DEFAULT, &pIB ) ) )
49 {
50 _PostError("Can't create D3D index buffer");
51 return false;
52 }
53 //锁定顶点缓存
54 WORD *pIndices, n=0;
55 if( FAILED( pIB->Lock( 0, 0, (BYTE**)&pIndices, 0 ) ) )
56 {
57 _PostError("Can't lock D3D index buffer");
58 return false;
59 }
60 //建立索引 这里主要是针对hgeQuad的方式。DX中没有四边形图元，所以这里是由两个三角形拼起来的。
61 //绘制三角形的时候，默认是逆时针方向绘三个顶点
62 for(int i=0; i<VERTEX_BUFFER_SIZE/4; i++) {
63 /*
64 第一个三角形
65 pIndices[0] = n;
66 pIndices[1] = n+1;
67 pIndices[2] = n+2;
68 */
69 *pIndices++=n;
70 *pIndices++=n+1;
71 *pIndices++=n+2;
72 /*
73 第二个三角形
74 pIndices[0] = n+2;
75 pIndices[1] = n+3;
76 pIndices[2] = n;
77 */
78 *pIndices++=n+2;
79 *pIndices++=n+3;
80 *pIndices++=n;
81 n+=4;
82 }
83 pIB->Unlock();
84 pD3DDevice->SetIndices(pIB,0);
85
86 // Set common render states
87 //设置通用渲染状态
88
89 //pD3DDevice->SetRenderState( D3DRS_LASTPIXEL, FALSE );
90 //D3DRS_CULLMODE 这个参数用来指定三角形背面的剔除方式。
91 //D3DCULL_NONE,不要剔除背面;
92 //D3DCULL_CW,按照顺时针的方向的顶点剔除背面;
93 //D3DCULL_CCW,按照逆时针方向剔除背面。
94 pD3DDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
95 //关闭光照
96 pD3DDevice->SetRenderState( D3DRS_LIGHTING, FALSE );
97 //打开alpha通道
98 pD3DDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, TRUE );
99 //下面设置alpha混合系数
100 pD3DDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA ); //设置源混合方式 D3DBLEND_SRCALPHA：Blend factor is (As, As, As, As).
101 pD3DDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA ); //设置目的混合方式 D3DBLEND_INVSRCALPHA：Blend factor is ( 1 - As, 1 - As, 1 - As, 1 - As).
102
103 //调用alpha测试，用于提升性能
104 pD3DDevice->SetRenderState( D3DRS_ALPHATESTENABLE, TRUE );
105 //测试参考值,0x01相当于对于全透明的，将不渲染
106 pD3DDevice->SetRenderState( D3DRS_ALPHAREF, 0x01 );
107 //要求渲染>=参考值的像素
108 pD3DDevice->SetRenderState( D3DRS_ALPHAFUNC, D3DCMP_GREATEREQUAL );
109
110 //设置状态
111 //纹理融合操作
112 pD3DDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_MODULATE ); //设置颜色通道混合控制为：多参数
113 pD3DDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE ); //
114 pD3DDevice->SetTextureStageState( 0, D3DTSS_COLORARG2, D3DTA_DIFFUSE );
115
116 pD3DDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_MODULATE ); ////设置alpha通道混合控制为：多参数
117 pD3DDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
118 pD3DDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
119 //D3DTSS_MIPFILTER过滤采用近点采样
120 pD3DDevice->SetTextureStageState(0, D3DTSS_MIPFILTER, D3DTEXF_POINT);
121
122 if(bTextureFilter) //如果使用纹理过滤
123 {
124 pD3DDevice->SetTextureStageState(0,D3DTSS_MAGFILTER,D3DTEXF_LINEAR);
125 pD3DDevice->SetTextureStageState(0,D3DTSS_MINFILTER,D3DTEXF_LINEAR);
126 }
127 else
128 {
129 pD3DDevice->SetTextureStageState(0,D3DTSS_MAGFILTER,D3DTEXF_POINT);
130 pD3DDevice->SetTextureStageState(0,D3DTSS_MINFILTER,D3DTEXF_POINT);
131 }
132
133 nPrim=0;
134 CurPrimType=HGEPRIM_QUADS; //当前主要操作类型
135 CurBlendMode = BLEND_DEFAULT; //当前混合方式
136 CurTexture = NULL; //当前纹理
137
138 pD3DDevice->SetTransform(D3DTS_VIEW, &matView); //设置视图，该值为默认值，没有变化
139 pD3DDevice->SetTransform(D3DTS_PROJECTION, &matProj); //设置投影，已设为正交投影，具体参考我前面的散笔:HGE
的坐标转换函数注释说明_SetProjectionMatrix
140
141 return true;
142 }
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