325 lines
9.8 KiB
C++
325 lines
9.8 KiB
C++
//========= Copyright Valve Corporation, All rights reserved. ============//
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//
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// Purpose: XBox Compiled Bitmap Fonts
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//
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//=============================================================================//
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// conversion from 'double' to 'float', possible loss of data
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#pragma warning( disable : 4244 )
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#include <assert.h>
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#include <stdio.h>
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#include <string.h>
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#include <math.h>
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#include <malloc.h>
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#include "vgui_surfacelib/BitmapFont.h"
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#include "vgui_surfacelib/FontManager.h"
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#include <tier0/dbg.h>
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#include <vgui/ISurface.h>
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#include <tier0/mem.h>
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#include <utlbuffer.h>
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#include "filesystem.h"
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#include "materialsystem/itexture.h"
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// memdbgon must be the last include file in a .cpp file!!!
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#include "tier0/memdbgon.h"
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struct BitmapFontTable_t
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{
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BitmapFontTable_t()
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{
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m_szName = UTL_INVAL_SYMBOL;
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m_pBitmapFont = NULL;
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m_pBitmapGlyphs = NULL;
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m_pTexture = NULL;
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}
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CUtlSymbol m_szName;
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BitmapFont_t *m_pBitmapFont;
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BitmapGlyph_t *m_pBitmapGlyphs;
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ITexture *m_pTexture;
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};
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static CUtlVector< BitmapFontTable_t > g_BitmapFontTable( 1, 4 );
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//-----------------------------------------------------------------------------
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// Purpose: Constructor
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//-----------------------------------------------------------------------------
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CBitmapFont::CBitmapFont()
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{
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m_scalex = 1.0f;
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m_scaley = 1.0f;
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m_bitmapFontHandle = g_BitmapFontTable.InvalidIndex();
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}
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//-----------------------------------------------------------------------------
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// Purpose: Destructor
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//-----------------------------------------------------------------------------
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CBitmapFont::~CBitmapFont()
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{
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}
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//-----------------------------------------------------------------------------
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// Purpose: creates the font. returns false if the font cannot be mounted.
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//-----------------------------------------------------------------------------
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bool CBitmapFont::Create( const char *pFontFilename, float scalex, float scaley, int flags )
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{
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MEM_ALLOC_CREDIT();
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if ( !pFontFilename || !pFontFilename[0] )
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{
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return false;
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}
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CUtlSymbol symbol;
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char fontName[MAX_PATH];
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Q_FileBase( pFontFilename, fontName, MAX_PATH );
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Q_strlower( fontName );
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symbol = fontName;
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// find a match that can use same entries
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BitmapFontTable_t *pFontTable = NULL;
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for ( int i=0; i<g_BitmapFontTable.Count(); i++ )
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{
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if ( symbol == g_BitmapFontTable[i].m_szName )
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{
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m_bitmapFontHandle = i;
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pFontTable = &g_BitmapFontTable[m_bitmapFontHandle];
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break;
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}
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}
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if ( !pFontTable )
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{
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void *pBuf = NULL;
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int nLength;
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nLength = FontManager().FileSystem()->ReadFileEx( pFontFilename, "GAME", &pBuf );
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if ( nLength <= 0 || !pBuf )
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{
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// not found
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return false;
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}
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if ( ((BitmapFont_t*)pBuf)->m_id != LittleLong( BITMAPFONT_ID ) || ((BitmapFont_t*)pBuf)->m_Version != LittleLong( BITMAPFONT_VERSION ) )
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{
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// bad version
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return false;
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}
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if ( IsX360() )
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{
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CByteswap swap;
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swap.ActivateByteSwapping( true );
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swap.SwapFieldsToTargetEndian( (BitmapFont_t*)pBuf );
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swap.SwapFieldsToTargetEndian( (BitmapGlyph_t*)((char*)pBuf + sizeof( BitmapFont_t )), ((BitmapFont_t*)pBuf)->m_NumGlyphs );
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}
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// create it
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m_bitmapFontHandle = g_BitmapFontTable.AddToTail();
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pFontTable = &g_BitmapFontTable[m_bitmapFontHandle];
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pFontTable->m_szName = fontName;
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pFontTable->m_pBitmapFont = new BitmapFont_t;
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memcpy( pFontTable->m_pBitmapFont, pBuf, sizeof( BitmapFont_t ) );
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pFontTable->m_pBitmapGlyphs = new BitmapGlyph_t[pFontTable->m_pBitmapFont->m_NumGlyphs];
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memcpy( pFontTable->m_pBitmapGlyphs, (unsigned char*)pBuf + sizeof(BitmapFont_t), pFontTable->m_pBitmapFont->m_NumGlyphs*sizeof(BitmapGlyph_t) );
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FontManager().FileSystem()->FreeOptimalReadBuffer( pBuf );
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// load the art resources
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char textureName[MAX_PATH];
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Q_snprintf( textureName, MAX_PATH, "vgui/fonts/%s", fontName );
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pFontTable->m_pTexture = FontManager().MaterialSystem()->FindTexture( textureName, TEXTURE_GROUP_VGUI );
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#if defined( _DEBUG ) && !defined( DX_TO_GL_ABSTRACTION )
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if ( pFontTable->m_pBitmapFont->m_PageWidth != pFontTable->m_pTexture->GetActualWidth() ||
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pFontTable->m_pBitmapFont->m_PageHeight != pFontTable->m_pTexture->GetActualHeight() )
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{
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// font is out of sync with its art
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Assert( 0 );
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return false;
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}
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#endif
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// the font texture lives forever, ensure it doesn't get purged
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pFontTable->m_pTexture->IncrementReferenceCount();
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}
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// setup font properties
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m_scalex = scalex;
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m_scaley = scaley;
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// flags are derived from the baked font
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m_iFlags = vgui::ISurface::FONTFLAG_BITMAP;
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int bitmapFlags = pFontTable->m_pBitmapFont->m_Flags;
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if ( bitmapFlags & BF_ANTIALIASED )
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{
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m_iFlags |= vgui::ISurface::FONTFLAG_ANTIALIAS;
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}
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if ( bitmapFlags & BF_ITALIC )
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{
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m_iFlags |= vgui::ISurface::FONTFLAG_ITALIC;
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}
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if ( bitmapFlags & BF_BLURRED )
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{
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m_iFlags |= vgui::ISurface::FONTFLAG_GAUSSIANBLUR;
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m_iBlur = 1;
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}
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if ( bitmapFlags & BF_SCANLINES )
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{
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m_iScanLines = 1;
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}
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if ( bitmapFlags & BF_OUTLINED )
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{
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m_iFlags |= vgui::ISurface::FONTFLAG_OUTLINE;
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m_iOutlineSize = 1;
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}
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if ( bitmapFlags & BF_DROPSHADOW )
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{
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m_iFlags |= vgui::ISurface::FONTFLAG_DROPSHADOW;
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m_iDropShadowOffset = 1;
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}
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if ( flags & vgui::ISurface::FONTFLAG_ADDITIVE )
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{
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m_bAdditive = true;
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m_iFlags |= vgui::ISurface::FONTFLAG_ADDITIVE;
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}
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m_iMaxCharWidth = (float)pFontTable->m_pBitmapFont->m_MaxCharWidth * m_scalex;
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m_iHeight = (float)pFontTable->m_pBitmapFont->m_MaxCharHeight * m_scaley;
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m_iAscent = (float)pFontTable->m_pBitmapFont->m_Ascent * m_scaley;
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// mark as valid
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m_szName = fontName;
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return true;
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}
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//-----------------------------------------------------------------------------
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// Purpose: returns true if the font is equivalent to that specified
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//-----------------------------------------------------------------------------
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bool CBitmapFont::IsEqualTo( const char *windowsFontName, float scalex, float scaley, int flags )
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{
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char fontname[MAX_PATH];
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Q_FileBase( windowsFontName, fontname, MAX_PATH );
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if ( !Q_stricmp( fontname, m_szName.String() ) &&
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m_scalex == scalex &&
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m_scaley == scaley )
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{
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int commonFlags = m_iFlags & flags;
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if ( commonFlags & vgui::ISurface::FONTFLAG_ADDITIVE )
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{
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// an exact match
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return true;
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}
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}
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return false;
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}
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//-----------------------------------------------------------------------------
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// Purpose: sets the scale for a font
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//-----------------------------------------------------------------------------
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void CBitmapFont::SetScale( float sx, float sy )
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{
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m_scalex = sx;
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m_scaley = sy;
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}
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//-----------------------------------------------------------------------------
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// Purpose: gets the abc widths for a character
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//-----------------------------------------------------------------------------
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void CBitmapFont::GetCharABCWidths( int ch, int &a, int &b, int &c )
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{
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Assert( IsValid() && ch >= 0 && ch <= 255 );
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BitmapFontTable_t *pFont = &g_BitmapFontTable[m_bitmapFontHandle];
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ch = pFont->m_pBitmapFont->m_TranslateTable[ch];
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a = (float)pFont->m_pBitmapGlyphs[ch].a * m_scalex;
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b = (float)pFont->m_pBitmapGlyphs[ch].b * m_scalex;
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c = (float)pFont->m_pBitmapGlyphs[ch].c * m_scalex;
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}
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void CBitmapFont::GetCharRGBA( wchar_t ch, int rgbaWide, int rgbaTall, unsigned char *prgba )
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{
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// CBitmapFont derives off CLinuxFont, etc. But you should never call GetCharRGBA on a bitmap font.
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// If we let this fall into the CLinuxFont code, we'd have a difficult to track down bug - so crash
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// hard here...
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Error( "GetCharRGBA called on CBitmapFont." );
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}
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void CBitmapFont::GetKernedCharWidth( wchar_t ch, wchar_t chBefore, wchar_t chAfter, float &wide, float &abcA, float &abcC )
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{
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Assert( IsValid() && ch >= 0 && ch <= 255 );
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float abcB;
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BitmapFontTable_t *pFont = &g_BitmapFontTable[m_bitmapFontHandle];
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ch = pFont->m_pBitmapFont->m_TranslateTable[ch];
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abcA = (float)pFont->m_pBitmapGlyphs[ch].a * m_scalex;
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abcB = (float)pFont->m_pBitmapGlyphs[ch].b * m_scalex;
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abcC = (float)pFont->m_pBitmapGlyphs[ch].c * m_scalex;
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wide = ( abcA + abcB + abcC );
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}
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//-----------------------------------------------------------------------------
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// Purpose: gets the texcoords for a character
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//-----------------------------------------------------------------------------
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void CBitmapFont::GetCharCoords( int ch, float *left, float *top, float *right, float *bottom )
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{
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Assert( IsValid() && ch >= 0 && ch <= 255 );
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BitmapFontTable_t *pFont = &g_BitmapFontTable[m_bitmapFontHandle];
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ch = pFont->m_pBitmapFont->m_TranslateTable[ch];
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*left = (float)pFont->m_pBitmapGlyphs[ch].x/(float)pFont->m_pBitmapFont->m_PageWidth;
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*top = (float)pFont->m_pBitmapGlyphs[ch].y/(float)pFont->m_pBitmapFont->m_PageHeight;
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*right = (float)(pFont->m_pBitmapGlyphs[ch].x+pFont->m_pBitmapGlyphs[ch].w)/(float)pFont->m_pBitmapFont->m_PageWidth;
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*bottom = (float)(pFont->m_pBitmapGlyphs[ch].y+pFont->m_pBitmapGlyphs[ch].h)/(float)pFont->m_pBitmapFont->m_PageHeight;
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}
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//-----------------------------------------------------------------------------
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// Purpose: gets the texture page
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//-----------------------------------------------------------------------------
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ITexture *CBitmapFont::GetTexturePage()
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{
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Assert( IsValid() );
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return g_BitmapFontTable[m_bitmapFontHandle].m_pTexture;
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}
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BEGIN_BYTESWAP_DATADESC( BitmapGlyph_t )
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DEFINE_FIELD( x, FIELD_SHORT ),
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DEFINE_FIELD( y, FIELD_SHORT ),
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DEFINE_FIELD( w, FIELD_SHORT ),
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DEFINE_FIELD( h, FIELD_SHORT ),
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DEFINE_FIELD( a, FIELD_SHORT ),
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DEFINE_FIELD( b, FIELD_SHORT ),
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DEFINE_FIELD( c, FIELD_SHORT ),
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END_BYTESWAP_DATADESC()
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BEGIN_BYTESWAP_DATADESC( BitmapFont_t )
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DEFINE_FIELD( m_id, FIELD_INTEGER ),
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DEFINE_FIELD( m_Version, FIELD_INTEGER ),
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DEFINE_FIELD( m_PageWidth, FIELD_SHORT ),
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DEFINE_FIELD( m_PageHeight, FIELD_SHORT ),
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DEFINE_FIELD( m_MaxCharWidth, FIELD_SHORT ),
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DEFINE_FIELD( m_MaxCharHeight, FIELD_SHORT ),
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DEFINE_FIELD( m_Flags, FIELD_SHORT ),
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DEFINE_FIELD( m_Ascent, FIELD_SHORT ),
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DEFINE_FIELD( m_NumGlyphs, FIELD_SHORT ),
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DEFINE_ARRAY( m_TranslateTable, FIELD_CHARACTER, 256 ),
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END_BYTESWAP_DATADESC()
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