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- //-----------------------------------------------------------------------------
- // File: D3DFont.cpp
- //
- // Desc: Texture-based font class
- //
- // Copyright (c) 2000-2001 Microsoft Corporation. All rights reserved.
- //-----------------------------------------------------------------------------
- #include <streams.h>
- #include <stdio.h>
- #include <tchar.h>
-
- #include <ddraw.h>
- #define D3D_OVERLOADS
- #include <d3d.h>
- #include "D3DFont.h"
-
-
- #define D3DFVF_FONT2DVERTEX (D3DFVF_XYZRHW|D3DFVF_DIFFUSE|D3DFVF_TEX1)
-
- inline FONT2DVERTEX InitFont2DVertex( const D3DXVECTOR4& p, D3DCOLOR color,
- FLOAT tu, FLOAT tv )
- {
- FONT2DVERTEX v;
-
- v.p.x = p.x;
- v.p.y = p.y;
- v.p.z = p.z;
- v.p.w = p.w;
- v.color = color;
- 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;
- ZeroMemory(&m_VB, sizeof(m_VB));
-
- 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(
- LPDIRECTDRAW7 pDD,
- LPDIRECT3DDEVICE7 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.
- D3DDEVICEDESC7 d3dCaps;
- m_pd3dDevice->GetCaps( &d3dCaps );
-
- if( m_dwTexWidth > d3dCaps.dwMaxTextureWidth )
- {
- m_fTextScale = (FLOAT)d3dCaps.dwMaxTextureWidth / (FLOAT)m_dwTexWidth;
- m_dwTexWidth = m_dwTexHeight = d3dCaps.dwMaxTextureWidth;
- }
-
- DDSURFACEDESC2 ddsd;
- INITDDSTRUCT(ddsd);
- ddsd.dwFlags = DDSD_CAPS | DDSD_WIDTH | DDSD_HEIGHT | DDSD_PIXELFORMAT;
-
- ddsd.ddsCaps.dwCaps = DDSCAPS_TEXTURE;
- ddsd.ddsCaps.dwCaps2 = DDSCAPS2_TEXTUREMANAGE | DDSCAPS2_HINTSTATIC;
-
- ddsd.dwWidth = m_dwTexWidth;
- ddsd.dwHeight = m_dwTexHeight;
- ddsd.ddpfPixelFormat.dwFourCC = BI_RGB;
- ddsd.ddpfPixelFormat.dwFlags = DDPF_RGB;
- ddsd.ddpfPixelFormat.dwRGBBitCount = 16;
- ddsd.ddpfPixelFormat.dwRGBAlphaBitMask = 0xF000;
- ddsd.ddpfPixelFormat.dwRBitMask = 0x0F00;
- ddsd.ddpfPixelFormat.dwGBitMask = 0x00F0;
- ddsd.ddpfPixelFormat.dwBBitMask = 0x000F;
-
- // Create a new texture for the font
- hr = pDD->CreateSurface(&ddsd, &m_pTexture, NULL);
-
- 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_STRING_PRECIS,
- CLIP_STROKE_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
- m_pTexture->Lock(NULL, &ddsd, DDLOCK_NOSYSLOCK | DDLOCK_WAIT, NULL);
-
- WORD* pDst16 = (WORD*)ddsd.lpSurface;
- BYTE bAlpha; // 4-bit measure of pixel intensity
-
- for( y=0; y < m_dwTexHeight; y++ )
- {
- for( x=0; x < m_dwTexWidth; x++ )
- {
- bAlpha = (BYTE)((pBitmapBits[m_dwTexWidth*y + x] & 0xff) >> 4);
- if (bAlpha > 0)
- {
- *pDst16++ = (WORD) ((bAlpha << 12) | 0x0fff);
- }
- else
- {
- *pDst16++ = 0x0000;
- }
- }
- }
-
- // Done updating texture, so clean up used objects
- m_pTexture->Unlock(NULL);
- DeleteObject( hbmBitmap );
- DeleteDC( hDC );
- DeleteObject( hFont );
-
- return S_OK;
- }
-
- //-----------------------------------------------------------------------------
- // Name: RestoreDeviceObjects()
- // Desc:
- //-----------------------------------------------------------------------------
- HRESULT CD3DFont::RestoreDeviceObjects()
- {
- // Create vertex buffer for the letters
-
- ZeroMemory(&m_VB, sizeof(m_VB));
-
- // Create the state blocks for rendering text
- m_pd3dDevice->SetTexture(0, m_pTexture);
-
- m_pd3dDevice->SetRenderState(D3DRENDERSTATE_BLENDENABLE, TRUE);
- m_pd3dDevice->SetRenderState(D3DRENDERSTATE_SRCBLEND, D3DBLEND_SRCALPHA);
- m_pd3dDevice->SetRenderState(D3DRENDERSTATE_DESTBLEND, D3DBLEND_INVSRCALPHA);
-
- m_pd3dDevice->SetRenderState(D3DRENDERSTATE_ALPHATESTENABLE, TRUE);
- m_pd3dDevice->SetRenderState(D3DRENDERSTATE_ALPHAREF, 0x08);
- m_pd3dDevice->SetRenderState(D3DRENDERSTATE_ALPHAFUNC, D3DCMP_GREATEREQUAL);
-
- m_pd3dDevice->SetRenderState(D3DRENDERSTATE_CULLMODE, D3DCULL_NONE);
- m_pd3dDevice->SetRenderState(D3DRENDERSTATE_LIGHTING, 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, D3DTFN_POINT);
- m_pd3dDevice->SetTextureStageState(0, D3DTSS_MAGFILTER, D3DTFG_POINT);
- m_pd3dDevice->SetTextureStageState(0, D3DTSS_MIPFILTER, D3DTFP_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 );
-
- return S_OK;
- }
-
-
- //-----------------------------------------------------------------------------
- // Name: InvalidateDeviceObjects()
- // Desc: Destroys all device-dependent objects
- //-----------------------------------------------------------------------------
- HRESULT CD3DFont::InvalidateDeviceObjects()
- {
- ZeroMemory(&m_VB, sizeof(m_VB));
-
- // 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()
- {
- 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: 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
- RestoreDeviceObjects();
-
- // Set filter states
- if( dwFlags & D3DFONT_FILTERED )
- {
- m_pd3dDevice->SetTextureStageState(0, D3DTSS_MINFILTER, D3DTFN_LINEAR);
- m_pd3dDevice->SetTextureStageState(0, D3DTSS_MAGFILTER, D3DTFG_LINEAR);
- }
-
- FLOAT fStartX = sx;
-
- // Fill vertex buffer
- FONT2DVERTEX* pVertices = NULL;
- DWORD dwNumTriangles = 0;
- pVertices = &m_VB[0];
-
- 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;
-
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+h-0.5f,0.5f,2.0f), dwColor, tx1, ty2 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+h-0.5f,0.5f,2.0f), dwColor, tx2, ty2 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+0-0.5f,sy+0-0.5f,0.5f,2.0f), dwColor, tx1, ty1 );
- *pVertices++ = InitFont2DVertex( D3DXVECTOR4(sx+w-0.5f,sy+0-0.5f,0.5f,2.0f), dwColor, tx2, ty1 );
-
- dwNumTriangles += 2;
-
- m_pd3dDevice->DrawPrimitive(D3DPT_TRIANGLESTRIP,
- D3DFVF_XYZRHW | D3DFVF_DIFFUSE | D3DFVF_TEX1,
- &m_VB[0], dwNumTriangles*2, D3DDP_WAIT);
- pVertices = &m_VB[0];
- dwNumTriangles = 0L;
-
- sx += w;
- }
- return S_OK;
- }
-
-