How to replace SetFVF with vertex shader?

Alex F · 2008-04-10T01:27:59

I have the program with pixel shader, which draws 2D image in a rectangle in orthogonal projection. This works well, but one of display cards doesn't show an image giving error message "Vertex shader v. 3.0" is required. Though this looks like driver bug, I must support this card, and need to replace my D3D drawing rectangle code with vertex shader. The code is quite simple: it draws textured 2D rectangle in the center of the screen, in Z=0 plane, with IMAGE_SIZE size: // Vertices LPDIRECT3DVERTEXBUFFER9 g_pVertices = NULL; struct PANELVERTEX { FLOAT x, y, z; DWORD color; FLOAT u, v; }; #define D3DFVF_PANELVERTEX (D3DFVF_XYZ | D3DFVF_DIFFUSE | D3DFVF_TEX1) // Initialization void PostInitialize(HWND hWnd) { ... g_pd3dDevice->SetVertexShader(NULL); g_pd3dDevice->SetFVF(D3DFVF_PANELVERTEX); g_pd3dDevice->SetStreamSource(0, g_pVertices, 0, sizeof(PANELVERTEX)); } // Initialize vertices void CreateVertices() { float PanelWidth = IMAGE_SIZE; // 1024 float PanelHeight = IMAGE_SIZE; g_pd3dDevice->CreateVertexBuffer(4 * sizeof(PANELVERTEX), D3DUSAGE_WRITEONLY, D3DFVF_PANELVERTEX, D3DPOOL_MANAGED, &g_pVertices, NULL); PANELVERTEX* pVertices = NULL; g_pVertices->Lock(0, 4 * sizeof(PANELVERTEX), (void**)&pVertices, 0); //Set all the colors to white pVertices[0].color = pVertices[1].color = pVertices[2].color = pVertices[3].color = 0xffffffff; //Set positions and texture coordinates pVertices[0].x = pVertices[3].x = -PanelWidth / 2.0f; pVertices[1].x = pVertices[2].x = PanelWidth / 2.0f; pVertices[0].y = pVertices[1].y = PanelHeight / 2.0f; pVertices[2].y = pVertices[3].y = -PanelHeight / 2.0f; pVertices[0].z = pVertices[1].z = pVertices[2].z = pVertices[3].z = 1.0f; pVertices[1].u = pVertices[2].u = 1.0f; pVertices[0].u = pVertices[3].u = 0.0f; pVertices[0].v = pVertices[1].v = 0.0f; pVertices[2].v = pVertices[3].v = 1.0f; g_pVertices->Unlock(); } // WM_SIZE handling void SetViewParameters(HWND hWnd) { RECT rect; GetClientRect(hWnd, &rect); float WindowWidth = (float)(rect.right - rect.left); float WindowHeight = (float)(rect.bottom - rect.top); float viewWidth = IMAGE_SIZE; float viewHeight = IMAGE_SIZE; if ( WindowWidth > WindowHeight ) { viewWidth *= (WindowWidth/WindowHeight); } else { viewHeight *= (WindowHeight/WindowWidth); } D3DXMATRIX Ortho2D; D3DXMATRIX Identity; D3DXMatrixOrthoLH(&Ortho2D, viewWidth, viewHeight, 0.0f, 1.0f); D3DXMatrixIdentity(&Identity); g_pd3dDevice->SetTransform(D3DTS_PROJECTION, &Ortho2D); g_pd3dDevice->SetTransform(D3DTS_WORLD, &Identity); g_pd3dDevice->SetTransform(D3DTS_VIEW, &Identity); } // Rendering void Render2D() { ... g_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLEFAN, 0, 2); } Now I need to do the same with vertex shader. I know how to compile and set vertex shader in 3D device. But I don't know what should be vertex shader code, and what part of my code shown here should be removed and replaced by vertex shader.

Graphics and GPU Programming Programming

Started by Alex F April 05, 2008 07:30 AM

11 comments, last by Alex F 16 years, 1 month ago

ET3D

810

April 09, 2008 11:14 AM

What problem are you having? It looks like a simple shader that should work as is in ps_2_0.

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MJP

20,296

April 09, 2008 11:18 AM

If you want the assembly, just generate it with fxc.

[Edited by - MJP on April 9, 2008 11:18:22 AM]

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Alex F

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April 10, 2008 01:27 AM

Thank you very much for your help. The problem is solved by reducing pixel shader version to ps_2_0, as suggested by ET3D. Existing shader code is translated to Assembly using fxc tool.

How to replace SetFVF with vertex shader?

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How to replace SetFVF with vertex shader?

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