RE: Display 2D image using textured quad
From: Mark Davis [MSFT] (markda_at_online.microsoft.com)
Date: 06/26/04
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Date: Sat, 26 Jun 2004 03:33:11 GMT
Hi Terry ...
Yes, you do need to call Begin() and End() on each sprite object (within
the Begin/EndScene of your device). The reason your code works when those
lines are uncommented is that, internally, GetTransform calls Begin(),
which sets a number of default renderstates - see the documentation for
ID3DXSprite::Begin() for details of the renderstates.
Mark Davis (MSFT)
-- This posting is provided "AS IS" with no warranties, and confers no rights. Use of included information and code is subject to the terms specified at http://www.microsoft.com/info/cpyright.htm. -------------------- >Thread-Topic: Display 2D image using textured quad >thread-index: AcRaD58yKb0VtnRaS8WO33D0NlVF1w== >X-WBNR-Posting-Host: 209.167.167.158 >From: "=?Utf-8?B?VGVycnk=?=" <Terry@discussions.microsoft.com> >References: <921723B5-DBE9-4084-B885-DB38B0647844@microsoft.com> >Subject: RE: Display 2D image using textured quad >Date: Thu, 24 Jun 2004 10:21:01 -0700 >Lines: 79 >Message-ID: <6B744119-697D-4A71-939A-BBAE6F7E9BA0@microsoft.com> >MIME-Version: 1.0 >Content-Type: text/plain; > charset="Utf-8" >Content-Transfer-Encoding: 7bit >X-Newsreader: Microsoft CDO for Windows 2000 >Content-Class: urn:content-classes:message >Importance: normal >Priority: normal >X-MimeOLE: Produced By Microsoft MimeOLE V6.00.3790.0 >Newsgroups: microsoft.public.win32.programmer.directx.graphics >NNTP-Posting-Host: TK2MSFTNGXA03.phx.gbl 127.0.0.1 >Path: cpmsftngxa10.phx.gbl!TK2MSFTNGXA01.phx.gbl!TK2MSFTNGXA03.phx.gbl >Xref: cpmsftngxa10.phx.gbl microsoft.public.win32.programmer.directx.graphics:17626 >X-Tomcat-NG: microsoft.public.win32.programmer.directx.graphics > >Typo in the original post: > >The first line of code to uncomment to get it to work should have been: >//hr = g_sprite->Begin(D3DXSPRITE_DONOTSAVESTATE); >NOT >//hr = g_sprite->GetTransform(&transform); > >Any help appreciated, > >Terry > > >"Terry" wrote: > >> I am new to DirectX and am trying to use a textured quad for display of a simple 2D image. I want the image to show up in the top left corner of my window. I can NOT get the following code to display anything ... however, if I simply include the calls for starting and ending the drawing of a sprite, it works just fine. I assume this means that there are some calls to setup the RenderState or transform or etc, being done internally by the sprite calls that I am not doing. >> >> Here is the code: >> >> // Initialize the basics. >> g_d3d9 = Direct3DCreate9(D3D_SDK_VERSION); >> >> D3DPRESENT_PARAMETERS d3dpp; >> ZeroMemory( &d3dpp, sizeof(d3dpp) ); >> d3dpp.Windowed = TRUE; >> d3dpp.SwapEffect = D3DSWAPEFFECT_DISCARD; >> d3dpp.BackBufferFormat = D3DFMT_X8R8G8B8; >> >> HRESULT hr = g_d3d9->CreateDevice( D3DADAPTER_DEFAULT, D3DDEVTYPE_HAL, g_hWnd, D3DCREATE_SOFTWARE_VERTEXPROCESSING, &d3dpp, &g_device ); >> >> hr = g_device->Clear( 0, NULL, D3DCLEAR_TARGET, D3DCOLOR_XRGB(0,255,255), 1.0f, 0 ); >> >> // Read in the image. >> hr = D3DXGetImageInfoFromFile("c:\\tmp\\image.jpeg", &info); >> hr = D3DXCreateTextureFromFile(g_device, "c:\\tmp\\image.jpeg", &g_texture); >> >> // Setup the vertices >> struct CUSTOMVERTEX >> { >> float x, y, z, rhw; // The transformed position for the vertex. >> float tu, tv; >> }; >> >> #define D3DFVF_CUSTOMVERTEX (D3DFVF_XYZRHW|D3DFVF_TEX1) >> >> CUSTOMVERTEX vertices[] = >> { >> { 0.0f, 0.0f, 0.5f, 1.0f, 0.0f, 0.0f}, // x, y, z, rhw, u, v >> { 0.0f, 512.0f, 0.5f, 1.0f, 0.0f, 1.0f}, >> { 512.0f, 512.0f, 0.5f, 1.0f, 1.0f, 1.0f }, >> { 512.0f, 0.0f, 0.5f, 1.0f, 1.0f, 0.0f}, >> }; >> >> hr = g_device->CreateVertexBuffer( 4*sizeof(CUSTOMVERTEX), 0, D3DFVF_CUSTOMVERTEX, D3DPOOL_DEFAULT, &g_VB, NULL); >> >> VOID* pVertices; >> hr = g_VB->Lock( 0, sizeof(vertices), (void**)&pVertices, 0 ); >> memcpy( pVertices, vertices, sizeof(vertices) ); >> g_VB->Unlock(); >> >> hr = g_device->BeginScene(); >> >> // Uncomment the following 2 lines to get it to work. >> //hr = g_sprite->GetTransform(&transform); >> //hr = g_sprite->End(); >> >> hr = g_device->SetRenderState( D3DRS_LIGHTING, FALSE ); >> hr = g_device->SetTexture( 0, g_texture ); >> hr = g_device->SetStreamSource( 0, g_VB, 0, sizeof(CUSTOMVERTEX) ); >> hr = g_device->SetFVF( D3DFVF_CUSTOMVERTEX ); >> hr = g_device->DrawPrimitive( D3DPT_TRIANGLEFAN, 0, 2 ); >> >> hr = g_device->EndScene(); >> hr = g_device->Present( NULL, NULL, NULL, NULL ); >> >> >> Thanks, >> >> Terry >> >
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