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- //-----------------------------------------------------------------------------
- // File: D3DFont.cpp
- //
- // Desc: Texture-based font class
- //
- // Copyright (c) 1999-2001 Microsoft Corporation. All rights reserved.
- //-----------------------------------------------------------------------------
- #define STRICT
- #include <stdio.h>
- #include <tchar.h>
- #include <D3DX8.h>
- #include "D3DFont.h"
- #include "D3DUtil.h"
- #include "DXUtil.h"
-
-
-
-
- //-----------------------------------------------------------------------------
- // Custom vertex types for rendering text
- //-----------------------------------------------------------------------------
- #define MAX_NUM_VERTICES 50*6
-
- struct FONT2DVERTEX { D3DXVECTOR4 p; DWORD color; FLOAT tu, tv; };
- struct FONT3DVERTEX { D3DXVECTOR3 p; D3DXVECTOR3 n; FLOAT tu, tv; };
-
- #define D3DFVF_FONT2DVERTEX (D3DFVF_XYZRHW|D3DFVF_DIFFUSE|D3DFVF_TEX1)
- #define D3DFVF_FONT3DVERTEX (D3DFVF_XYZ|D3DFVF_NORMAL|D3DFVF_TEX1)
-
- inline FONT2DVERTEX InitFont2DVertex( const D3DXVECTOR4& p, D3DCOLOR color,
- FLOAT tu, FLOAT tv )
- {
- FONT2DVERTEX v; v.p = p; v.color = color; v.tu = tu; v.tv = tv;
- return v;
- }
-
- inline FONT3DVERTEX InitFont3DVertex( const D3DXVECTOR3& p, const D3DXVECTOR3& n,
- FLOAT tu, FLOAT tv )
- {
- FONT3DVERTEX v; v.p = p; v.n = n; v.tu = tu; v.tv = tv;
- return v;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: CD3DFont()
- // Desc: Font class constructor
- //-----------------------------------------------------------------------------
- CD3DFont::CD3DFont( TCHAR* strFontName, DWORD dwHeight, DWORD dwFlags )
- {
- _tcscpy( m_strFontName, strFontName );
- m_dwFontHeight = dwHeight;
- m_dwFontFlags = dwFlags;
-
- m_pd3dDevice = NULL;
- m_pTexture = NULL;
- m_pVB = NULL;
-
- m_dwSavedStateBlock = 0L;
- m_dwDrawTextStateBlock = 0L;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: ~CD3DFont()
- // Desc: Font class destructor
- //-----------------------------------------------------------------------------
- CD3DFont::~CD3DFont()
- {
- InvalidateDeviceObjects();
- DeleteDeviceObjects();
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: InitDeviceObjects()
- // Desc: Initializes device-dependent objects, including the vertex buffer used
- // for rendering text and the texture map which stores the font image.
- //-----------------------------------------------------------------------------
- HRESULT CD3DFont::InitDeviceObjects( LPDIRECT3DDEVICE8 pd3dDevice )
- {
- HRESULT hr;
-
- // Keep a local copy of the device
- m_pd3dDevice = pd3dDevice;
-
- // Establish the font and texture size
- m_fTextScale = 1.0f; // Draw fonts into texture without scaling
-
- // Large fonts need larger textures
- if( m_dwFontHeight > 40 )
- m_dwTexWidth = m_dwTexHeight = 1024;
- else if( m_dwFontHeight > 20 )
- m_dwTexWidth = m_dwTexHeight = 512;
- else
- m_dwTexWidth = m_dwTexHeight = 256;
-
- // If requested texture is too big, use a smaller texture and smaller font,
- // and scale up when rendering.
- D3DCAPS8 d3dCaps;
- m_pd3dDevice->GetDeviceCaps( &d3dCaps );
-
- if( m_dwTexWidth > d3dCaps.MaxTextureWidth )
- {
- m_fTextScale = (FLOAT)d3dCaps.MaxTextureWidth / (FLOAT)m_dwTexWidth;
- m_dwTexWidth = m_dwTexHeight = d3dCaps.MaxTextureWidth;
- }
-
- // Create a new texture for the font
- hr = m_pd3dDevice->CreateTexture( m_dwTexWidth, m_dwTexHeight, 1,
- 0, D3DFMT_A4R4G4B4,
- D3DPOOL_MANAGED, &m_pTexture );
- if( FAILED(hr) )
- return hr;
-
- // Prepare to create a bitmap
- DWORD* pBitmapBits;
- BITMAPINFO bmi;
- ZeroMemory( &bmi.bmiHeader, sizeof(BITMAPINFOHEADER) );
- bmi.bmiHeader.biSize = sizeof(BITMAPINFOHEADER);
- bmi.bmiHeader.biWidth = (int)m_dwTexWidth;
- bmi.bmiHeader.biHeight = -(int)m_dwTexHeight;
- bmi.bmiHeader.biPlanes = 1;
- bmi.bmiHeader.biCompression = BI_RGB;
- bmi.bmiHeader.biBitCount = 32;
-
- // Create a DC and a bitmap for the font
- HDC hDC = CreateCompatibleDC( NULL );
- HBITMAP hbmBitmap = CreateDIBSection( hDC, &bmi, DIB_RGB_COLORS,
- (VOID**)&pBitmapBits, NULL, 0 );
- SetMapMode( hDC, MM_TEXT );
-
- // Create a font. By specifying ANTIALIASED_QUALITY, we might get an
- // antialiased font, but this is not guaranteed.
- INT nHeight = -MulDiv( m_dwFontHeight,
- (INT)(GetDeviceCaps(hDC, LOGPIXELSY) * m_fTextScale), 72 );
- DWORD dwBold = (m_dwFontFlags&D3DFONT_BOLD) ? FW_BOLD : FW_NORMAL;
- DWORD dwItalic = (m_dwFontFlags&D3DFONT_ITALIC) ? TRUE : FALSE;
- HFONT hFont = CreateFont( nHeight, 0, 0, 0, dwBold, dwItalic,
- FALSE, FALSE, DEFAULT_CHARSET, OUT_DEFAULT_PRECIS,
- CLIP_DEFAULT_PRECIS, ANTIALIASED_QUALITY,
- VARIABLE_PITCH, m_strFontName );
- if( NULL==hFont )
- return E_FAIL;
-
- SelectObject( hDC, hbmBitmap );
- SelectObject( hDC, hFont );
-
- // Set text properties
- SetTextColor( hDC, RGB(255,255,255) );
- SetBkColor( hDC, 0x00000000 );
- SetTextAlign( hDC, TA_TOP );
-
- // Loop through all printable character and output them to the bitmap..
- // Meanwhile, keep track of the corresponding tex coords for each character.
- DWORD x = 0;
- DWORD y = 0;
- TCHAR str[2] = _T("x");
- SIZE size;
-
- for( TCHAR c=32; c<127; c++ )
- {
- str[0] = c;
- GetTextExtentPoint32( hDC, str, 1, &size );
-
- if( (DWORD)(x+size.cx+1) > m_dwTexWidth )
- {
- x = 0;
- y += size.cy+1;
- }
-
- ExtTextOut( hDC, x+0, y+0, ETO_OPAQUE, NULL, str, 1, NULL );
-
- m_fTexCoords[c-32][0] = ((FLOAT)(x+0))/m_dwTexWidth;
- m_fTexCoords[c-32][1] = ((FLOAT)(y+0))/m_dwTexHeight;
- m_fTexCoords[c-32][2] = ((FLOAT)(x+0+size.cx))/m_dwTexWidth;
- m_fTexCoords[c-32][3] = ((FLOAT)(y+0+size.cy))/m_dwTexHeight;
-
- x += size.cx+1;
- }
-
- // Lock the surface and write the alpha values for the set pixels
- D3DLOCKED_RECT d3dlr;
- m_pTexture->LockRect( 0, &d3dlr, 0, 0 );
- BYTE* pDstRow = (BYTE*)d3dlr.pBits;
- WORD* pDst16;
- BYTE bAlpha; // 4-bit measure of pixel intensity
-
- for( y=0; y < m_dwTexHeight; y++ )
- {
- pDst16 = (WORD*)pDstRow;
- for( x=0; x < m_dwTexWidth; x++ )
- {
- bAlpha = (BYTE)((pBitmapBits[m_dwTexWidth*y + x] & 0xff) >> 4);
- if (bAlpha > 0)
- {
- *pDst16++ = (bAlpha << 12) | 0x0fff;
- }
- else
- {
- *pDst16++ = 0x0000;
- }
- }
- pDstRow += d3dlr.Pitch;
- }
-
- // Done updating texture, so clean up used objects
- m_pTexture->UnlockRect(0);
- DeleteObject( hbmBitmap );
- DeleteDC( hDC );
- DeleteObject( hFont );
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: RestoreDeviceObjects()
- // Desc:
- //-----------------------------------------------------------------------------
- HRESULT CD3DFont::RestoreDeviceObjects()
- {
- HRESULT hr;
-
- // Create vertex buffer for the letters
- if( FAILED( hr = m_pd3dDevice->CreateVertexBuffer( MAX_NUM_VERTICES*sizeof(FONT2DVERTEX),
- D3DUSAGE_WRITEONLY | D3DUSAGE_DYNAMIC, 0,
- D3DPOOL_DEFAULT, &m_pVB ) ) )
- {
- return hr;
- }
-
- // Create the state blocks for rendering text
- for( UINT which=0; which<2; which++ )
- {
- m_pd3dDevice->BeginStateBlock();
- m_pd3dDevice->SetTexture( 0, m_pTexture );
-
- if ( D3DFONT_ZENABLE & m_dwFontFlags )
- m_pd3dDevice->SetRenderState( D3DRS_ZENABLE, TRUE );
- else
- m_pd3dDevice->SetRenderState( D3DRS_ZENABLE, FALSE );
-
- m_pd3dDevice->SetRenderState( D3DRS_ALPHABLENDENABLE, TRUE );
- m_pd3dDevice->SetRenderState( D3DRS_SRCBLEND, D3DBLEND_SRCALPHA );
- m_pd3dDevice->SetRenderState( D3DRS_DESTBLEND, D3DBLEND_INVSRCALPHA );
- m_pd3dDevice->SetRenderState( D3DRS_ALPHATESTENABLE, TRUE );
- m_pd3dDevice->SetRenderState( D3DRS_ALPHAREF, 0x08 );
- m_pd3dDevice->SetRenderState( D3DRS_ALPHAFUNC, D3DCMP_GREATEREQUAL );
- m_pd3dDevice->SetRenderState( D3DRS_FILLMODE, D3DFILL_SOLID );
- m_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_CCW );
- m_pd3dDevice->SetRenderState( D3DRS_STENCILENABLE, FALSE );
- m_pd3dDevice->SetRenderState( D3DRS_CLIPPING, TRUE );
- m_pd3dDevice->SetRenderState( D3DRS_EDGEANTIALIAS, FALSE );
- m_pd3dDevice->SetRenderState( D3DRS_CLIPPLANEENABLE, FALSE );
- m_pd3dDevice->SetRenderState( D3DRS_VERTEXBLEND, FALSE );
- m_pd3dDevice->SetRenderState( D3DRS_INDEXEDVERTEXBLENDENABLE, FALSE );
- m_pd3dDevice->SetRenderState( D3DRS_FOGENABLE, FALSE );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLOROP, D3DTOP_MODULATE );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG1, D3DTA_TEXTURE );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_COLORARG2, D3DTA_DIFFUSE );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAOP, D3DTOP_MODULATE );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG1, D3DTA_TEXTURE );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_ALPHAARG2, D3DTA_DIFFUSE );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MINFILTER, D3DTEXF_POINT );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MAGFILTER, D3DTEXF_POINT );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MIPFILTER, D3DTEXF_NONE );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_TEXCOORDINDEX, 0 );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_TEXTURETRANSFORMFLAGS, D3DTTFF_DISABLE );
- m_pd3dDevice->SetTextureStageState( 1, D3DTSS_COLOROP, D3DTOP_DISABLE );
- m_pd3dDevice->SetTextureStageState( 1, D3DTSS_ALPHAOP, D3DTOP_DISABLE );
-
- if( which==0 )
- m_pd3dDevice->EndStateBlock( &m_dwSavedStateBlock );
- else
- m_pd3dDevice->EndStateBlock( &m_dwDrawTextStateBlock );
- }
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: InvalidateDeviceObjects()
- // Desc: Destroys all device-dependent objects
- //-----------------------------------------------------------------------------
- HRESULT CD3DFont::InvalidateDeviceObjects()
- {
- SAFE_RELEASE( m_pVB );
-
- // Delete the state blocks
- if( m_pd3dDevice )
- {
- if( m_dwSavedStateBlock )
- m_pd3dDevice->DeleteStateBlock( m_dwSavedStateBlock );
- if( m_dwDrawTextStateBlock )
- m_pd3dDevice->DeleteStateBlock( m_dwDrawTextStateBlock );
- }
-
- m_dwSavedStateBlock = 0L;
- m_dwDrawTextStateBlock = 0L;
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: DeleteDeviceObjects()
- // Desc: Destroys all device-dependent objects
- //-----------------------------------------------------------------------------
- HRESULT CD3DFont::DeleteDeviceObjects()
- {
- SAFE_RELEASE( m_pTexture );
- m_pd3dDevice = NULL;
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: GetTextExtent()
- // Desc: Get the dimensions of a text string
- //-----------------------------------------------------------------------------
- HRESULT CD3DFont::GetTextExtent( TCHAR* strText, SIZE* pSize )
- {
- if( NULL==strText || NULL==pSize )
- return E_FAIL;
-
- FLOAT fRowWidth = 0.0f;
- FLOAT fRowHeight = (m_fTexCoords[0][3]-m_fTexCoords[0][1])*m_dwTexHeight;
- FLOAT fWidth = 0.0f;
- FLOAT fHeight = fRowHeight;
-
- while( *strText )
- {
- TCHAR c = *strText++;
-
- if( c == _T('\n') )
- {
- fRowWidth = 0.0f;
- fHeight += fRowHeight;
- }
- if( c < _T(' ') )
- continue;
-
- FLOAT tx1 = m_fTexCoords[c-32][0];
- FLOAT tx2 = m_fTexCoords[c-32][2];
-
- fRowWidth += (tx2-tx1)*m_dwTexWidth;
-
- if( fRowWidth > fWidth )
- fWidth = fRowWidth;
- }
-
- pSize->cx = (int)fWidth;
- pSize->cy = (int)fHeight;
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: DrawTextScaled()
- // Desc: Draws scaled 2D text. Note that x and y are in viewport coordinates
- // (ranging from -1 to +1). fXScale and fYScale are the size fraction
- // relative to the entire viewport. For example, a fXScale of 0.25 is
- // 1/8th of the screen width. This allows you to output text at a fixed
- // fraction of the viewport, even if the screen or window size changes.
- //-----------------------------------------------------------------------------
- HRESULT CD3DFont::DrawTextScaled( FLOAT x, FLOAT y, FLOAT z,
- FLOAT fXScale, FLOAT fYScale, DWORD dwColor,
- TCHAR* strText, DWORD dwFlags )
- {
- if( m_pd3dDevice == NULL )
- return E_FAIL;
-
- // Set up renderstate
- m_pd3dDevice->CaptureStateBlock( m_dwSavedStateBlock );
- m_pd3dDevice->ApplyStateBlock( m_dwDrawTextStateBlock );
- m_pd3dDevice->SetVertexShader( D3DFVF_FONT2DVERTEX );
- m_pd3dDevice->SetPixelShader( NULL );
- m_pd3dDevice->SetStreamSource( 0, m_pVB, sizeof(FONT2DVERTEX) );
-
- // Set filter states
- if( dwFlags & D3DFONT_FILTERED )
- {
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MINFILTER, D3DTEXF_LINEAR );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MAGFILTER, D3DTEXF_LINEAR );
- }
-
- D3DVIEWPORT8 vp;
- m_pd3dDevice->GetViewport( &vp );
- FLOAT sx = (x+1.0f)*vp.Width/2;
- FLOAT sy = (y+1.0f)*vp.Height/2;
- FLOAT sz = z;
- FLOAT rhw = 1.0f;
- FLOAT fStartX = sx;
-
- FLOAT fLineHeight = ( m_fTexCoords[0][3] - m_fTexCoords[0][1] ) * m_dwTexHeight;
-
- // Fill vertex buffer
- FONT2DVERTEX* pVertices;
- DWORD dwNumTriangles = 0L;
- m_pVB->Lock( 0, 0, (BYTE**)&pVertices, D3DLOCK_DISCARD );
-
- while( *strText )
- {
- TCHAR c = *strText++;
-
- if( c == _T('\n') )
- {
- sx = fStartX;
- sy += fYScale*vp.Height;
- }
- if( c < _T(' ') )
- continue;
-
- FLOAT tx1 = m_fTexCoords[c-32][0];
- FLOAT ty1 = m_fTexCoords[c-32][1];
- FLOAT tx2 = m_fTexCoords[c-32][2];
- FLOAT ty2 = m_fTexCoords[c-32][3];
-
- FLOAT w = (tx2-tx1)*m_dwTexWidth;
- FLOAT h = (ty2-ty1)*m_dwTexHeight;
-
- w *= (fXScale*vp.Width)/fLineHeight;
- h *= (fYScale*vp.Height)/fLineHeight;
-
- if( c != _T(' ') )
- {
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+h-0.5f,sz,rhw), dwColor, tx1, ty2 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+0-0.5f,sz,rhw), dwColor, tx1, ty1 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+h-0.5f,sz,rhw), dwColor, tx2, ty2 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+0-0.5f,sz,rhw), dwColor, tx2, ty1 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+h-0.5f,sz,rhw), dwColor, tx2, ty2 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+0-0.5f,sz,rhw), dwColor, tx1, ty1 );
- dwNumTriangles += 2;
-
- if( dwNumTriangles*3 > (MAX_NUM_VERTICES-6) )
- {
- // Unlock, render, and relock the vertex buffer
- m_pVB->Unlock();
- m_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, dwNumTriangles );
- m_pVB->Lock( 0, 0, (BYTE**)&pVertices, D3DLOCK_DISCARD );
- dwNumTriangles = 0L;
- }
- }
-
- sx += w;
- }
-
- // Unlock and render the vertex buffer
- m_pVB->Unlock();
- if( dwNumTriangles > 0 )
- m_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, dwNumTriangles );
-
- // Restore the modified renderstates
- m_pd3dDevice->ApplyStateBlock( m_dwSavedStateBlock );
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: DrawText()
- // Desc: Draws 2D text
- //-----------------------------------------------------------------------------
- HRESULT CD3DFont::DrawText( FLOAT sx, FLOAT sy, DWORD dwColor,
- TCHAR* strText, DWORD dwFlags )
- {
- if( m_pd3dDevice == NULL )
- return E_FAIL;
-
- // Setup renderstate
- m_pd3dDevice->CaptureStateBlock( m_dwSavedStateBlock );
- m_pd3dDevice->ApplyStateBlock( m_dwDrawTextStateBlock );
- m_pd3dDevice->SetVertexShader( D3DFVF_FONT2DVERTEX );
- m_pd3dDevice->SetPixelShader( NULL );
- m_pd3dDevice->SetStreamSource( 0, m_pVB, sizeof(FONT2DVERTEX) );
-
- // Set filter states
- if( dwFlags & D3DFONT_FILTERED )
- {
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MINFILTER, D3DTEXF_LINEAR );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MAGFILTER, D3DTEXF_LINEAR );
- }
-
- FLOAT fStartX = sx;
-
- // Fill vertex buffer
- FONT2DVERTEX* pVertices = NULL;
- DWORD dwNumTriangles = 0;
- m_pVB->Lock( 0, 0, (BYTE**)&pVertices, D3DLOCK_DISCARD );
-
- while( *strText )
- {
- TCHAR c = *strText++;
-
- if( c == _T('\n') )
- {
- sx = fStartX;
- sy += (m_fTexCoords[0][3]-m_fTexCoords[0][1])*m_dwTexHeight;
- }
- if( c < _T(' ') )
- continue;
-
- FLOAT tx1 = m_fTexCoords[c-32][0];
- FLOAT ty1 = m_fTexCoords[c-32][1];
- FLOAT tx2 = m_fTexCoords[c-32][2];
- FLOAT ty2 = m_fTexCoords[c-32][3];
-
- FLOAT w = (tx2-tx1) * m_dwTexWidth / m_fTextScale;
- FLOAT h = (ty2-ty1) * m_dwTexHeight / m_fTextScale;
-
- if( c != _T(' ') )
- {
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+h-0.5f,0.9f,1.0f), dwColor, tx1, ty2 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+0-0.5f,0.9f,1.0f), dwColor, tx1, ty1 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+h-0.5f,0.9f,1.0f), dwColor, tx2, ty2 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+0-0.5f,0.9f,1.0f), dwColor, tx2, ty1 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+h-0.5f,0.9f,1.0f), dwColor, tx2, ty2 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+0-0.5f,0.9f,1.0f), dwColor, tx1, ty1 );
- dwNumTriangles += 2;
-
- if( dwNumTriangles*3 > (MAX_NUM_VERTICES-6) )
- {
- // Unlock, render, and relock the vertex buffer
- m_pVB->Unlock();
- m_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, dwNumTriangles );
- pVertices = NULL;
- m_pVB->Lock( 0, 0, (BYTE**)&pVertices, D3DLOCK_DISCARD );
- dwNumTriangles = 0L;
- }
- }
-
- sx += w;
- }
-
- // Unlock and render the vertex buffer
- m_pVB->Unlock();
- if( dwNumTriangles > 0 )
- m_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, dwNumTriangles );
-
- // Restore the modified renderstates
- m_pd3dDevice->ApplyStateBlock( m_dwSavedStateBlock );
-
- return S_OK;
- }
-
-
-
-
- //-----------------------------------------------------------------------------
- // Name: Render3DText()
- // Desc: Renders 3D text
- //-----------------------------------------------------------------------------
- HRESULT CD3DFont::Render3DText( TCHAR* strText, DWORD dwFlags )
- {
- if( m_pd3dDevice == NULL )
- return E_FAIL;
-
- // Setup renderstate
- m_pd3dDevice->CaptureStateBlock( m_dwSavedStateBlock );
- m_pd3dDevice->ApplyStateBlock( m_dwDrawTextStateBlock );
- m_pd3dDevice->SetVertexShader( D3DFVF_FONT3DVERTEX );
- m_pd3dDevice->SetPixelShader( NULL );
- m_pd3dDevice->SetStreamSource( 0, m_pVB, sizeof(FONT3DVERTEX) );
-
- // Set filter states
- if( dwFlags & D3DFONT_FILTERED )
- {
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MINFILTER, D3DTEXF_LINEAR );
- m_pd3dDevice->SetTextureStageState( 0, D3DTSS_MAGFILTER, D3DTEXF_LINEAR );
- }
-
- // Position for each text element
- FLOAT x = 0.0f;
- FLOAT y = 0.0f;
-
- // Center the text block at the origin
- if( dwFlags & D3DFONT_CENTERED )
- {
- SIZE sz;
- GetTextExtent( strText, &sz );
- x = -(((FLOAT)sz.cx)/10.0f)/2.0f;
- y = -(((FLOAT)sz.cy)/10.0f)/2.0f;
- }
-
- // Turn off culling for two-sided text
- if( dwFlags & D3DFONT_TWOSIDED )
- m_pd3dDevice->SetRenderState( D3DRS_CULLMODE, D3DCULL_NONE );
-
- FLOAT fStartX = x;
- TCHAR c;
-
- // Fill vertex buffer
- FONT3DVERTEX* pVertices;
- DWORD dwVertex = 0L;
- DWORD dwNumTriangles = 0L;
- m_pVB->Lock( 0, 0, (BYTE**)&pVertices, D3DLOCK_DISCARD );
-
- while( c = *strText++ )
- {
- if( c == '\n' )
- {
- x = fStartX;
- y -= (m_fTexCoords[0][3]-m_fTexCoords[0][1])*m_dwTexHeight/10.0f;
- }
- if( c < 32 )
- continue;
-
- FLOAT tx1 = m_fTexCoords[c-32][0];
- FLOAT ty1 = m_fTexCoords[c-32][1];
- FLOAT tx2 = m_fTexCoords[c-32][2];
- FLOAT ty2 = m_fTexCoords[c-32][3];
-
- FLOAT w = (tx2-tx1) * m_dwTexWidth / ( 10.0f * m_fTextScale );
- FLOAT h = (ty2-ty1) * m_dwTexHeight / ( 10.0f * m_fTextScale );
-
- if( c != _T(' ') )
- {
- *pVertices++ = InitFont3DVertex( D3DXVECTOR3(x+0,y+0,0), D3DXVECTOR3(0,0,-1), tx1, ty2 );
- *pVertices++ = InitFont3DVertex( D3DXVECTOR3(x+0,y+h,0), D3DXVECTOR3(0,0,-1), tx1, ty1 );
- *pVertices++ = InitFont3DVertex( D3DXVECTOR3(x+w,y+0,0), D3DXVECTOR3(0,0,-1), tx2, ty2 );
- *pVertices++ = InitFont3DVertex( D3DXVECTOR3(x+w,y+h,0), D3DXVECTOR3(0,0,-1), tx2, ty1 );
- *pVertices++ = InitFont3DVertex( D3DXVECTOR3(x+w,y+0,0), D3DXVECTOR3(0,0,-1), tx2, ty2 );
- *pVertices++ = InitFont3DVertex( D3DXVECTOR3(x+0,y+h,0), D3DXVECTOR3(0,0,-1), tx1, ty1 );
- dwNumTriangles += 2;
-
- if( dwNumTriangles*3 > (MAX_NUM_VERTICES-6) )
- {
- // Unlock, render, and relock the vertex buffer
- m_pVB->Unlock();
- m_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, dwNumTriangles );
- m_pVB->Lock( 0, 0, (BYTE**)&pVertices, D3DLOCK_DISCARD );
- dwNumTriangles = 0L;
- }
- }
-
- x += w;
- }
-
- // Unlock and render the vertex buffer
- m_pVB->Unlock();
- if( dwNumTriangles > 0 )
- m_pd3dDevice->DrawPrimitive( D3DPT_TRIANGLELIST, 0, dwNumTriangles );
-
- // Restore the modified renderstates
- m_pd3dDevice->ApplyStateBlock( m_dwSavedStateBlock );
-
- return S_OK;
- }
-
-
-
-
-