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583 lines
17 KiB
583 lines
17 KiB
//========= Copyright � 1996-2005, Valve Corporation, All rights reserved. ============//
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//
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// Purpose:
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//
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//=====================================================================================//
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#pragma warning( disable : 4244 ) // conversion from 'double' to 'float', possible loss of data
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#define SUPPORT_CUSTOM_FONT_FORMAT
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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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#if !defined( _PS3 )
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#include <malloc.h>
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#endif // ! _PS3
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#include "vgui_surfacelib/Win32Font.h"
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#include "tier0/dbg.h"
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#include "vgui_surfacelib/IFontSurface.h"
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#include "tier0/mem.h"
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#include "utlbuffer.h"
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#include "FontEffects.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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static OSVERSIONINFO s_OsVersionInfo;
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static bool s_bOsVersionInitialized = false;
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bool s_bSupportsUnicode = false;
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//-----------------------------------------------------------------------------
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// Purpose: Constructor
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//-----------------------------------------------------------------------------
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CWin32Font::CWin32Font() : m_ExtendedABCWidthsCache(256, 0, &ExtendedABCWidthsCacheLessFunc)
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{
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m_szName = UTL_INVAL_SYMBOL;
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m_iTall = 0;
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m_iWeight = 0;
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m_iHeight = 0;
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m_iAscent = 0;
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m_iFlags = 0;
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m_iMaxCharWidth = 0;
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m_hFont = NULL;
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m_hDC = NULL;
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m_hDIB = NULL;
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m_bAntiAliased = false;
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m_bUnderlined = false;
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m_iBlur = 0;
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m_iScanLines = 0;
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m_bRotary = false;
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m_bAdditive = false;
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m_rgiBitmapSize[ 0 ] = m_rgiBitmapSize[ 1 ] = 0;
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m_ExtendedABCWidthsCache.EnsureCapacity( 128 );
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if ( !s_bOsVersionInitialized )
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{
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// get the operating system version
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s_bOsVersionInitialized = true;
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memset(&s_OsVersionInfo, 0, sizeof(s_OsVersionInfo));
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s_OsVersionInfo.dwOSVersionInfoSize = sizeof(s_OsVersionInfo);
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GetVersionEx(&s_OsVersionInfo);
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if (s_OsVersionInfo.dwMajorVersion >= 5)
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{
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s_bSupportsUnicode = true;
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}
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else
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{
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s_bSupportsUnicode = false;
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}
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}
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}
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//-----------------------------------------------------------------------------
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// Purpose: Destructor
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//-----------------------------------------------------------------------------
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CWin32Font::~CWin32Font()
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{
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if ( m_hFont )
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::DeleteObject( m_hFont );
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if ( m_hDC )
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::DeleteDC( m_hDC );
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if ( m_hDIB )
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::DeleteObject( m_hDIB );
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}
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#ifndef SUPPORT_CUSTOM_FONT_FORMAT
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//-----------------------------------------------------------------------------
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// Purpose: Font iteration callback function
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// used to determine whether or not a font exists on the system
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//-----------------------------------------------------------------------------
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extern bool g_bFontFound = false;
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int CALLBACK FontEnumProc(
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const LOGFONT *lpelfe, // logical-font data
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const TEXTMETRIC *lpntme, // physical-font data
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DWORD FontType, // type of font
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LPARAM lParam ) // application-defined data
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{
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g_bFontFound = true;
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return 0;
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}
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#endif // SUPPORT_CUSTOM_FONT_FORMAT
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//-----------------------------------------------------------------------------
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// Purpose: creates the font from windows. returns false if font does not exist in the OS.
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//-----------------------------------------------------------------------------
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bool CWin32Font::Create(const char *windowsFontName, int tall, int weight, int blur, int scanlines, int flags)
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{
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// setup font properties
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m_szName = windowsFontName;
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m_iTall = tall;
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m_iWeight = weight;
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m_iFlags = flags;
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m_bAntiAliased = (flags & FONTFLAG_ANTIALIAS) ? 1 : 0;
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m_bUnderlined = (flags & FONTFLAG_UNDERLINE) ? 1 : 0;
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m_iDropShadowOffset = (flags & FONTFLAG_DROPSHADOW) ? 1 : 0;
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m_iOutlineSize = (flags & FONTFLAG_OUTLINE) ? 1 : 0;
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m_iBlur = blur;
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m_iScanLines = scanlines;
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m_bRotary = (flags & FONTFLAG_ROTARY) ? 1 : 0;
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m_bAdditive = (flags & FONTFLAG_ADDITIVE) ? 1 : 0;
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int charset = (flags & FONTFLAG_SYMBOL) ? SYMBOL_CHARSET : ANSI_CHARSET;
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// hack for japanese win98 support
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if ( !stricmp( windowsFontName, "win98japanese" ) )
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{
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// use any font that contains the japanese charset
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charset = SHIFTJIS_CHARSET;
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m_szName = "Tahoma";
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}
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// create our windows device context
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m_hDC = ::CreateCompatibleDC(NULL);
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Assert( m_hDC );
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#ifndef SUPPORT_CUSTOM_FONT_FORMAT
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// Vitaliy: fonts registered using custom font format are
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// not enumerated. Font creation will fail below for a font that
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// cannot be instantiated.
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{
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// see if the font exists on the system
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LOGFONT logfont;
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logfont.lfCharSet = DEFAULT_CHARSET;
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logfont.lfPitchAndFamily = 0;
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strcpy(logfont.lfFaceName, m_szName.String());
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g_bFontFound = false;
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::EnumFontFamiliesEx(m_hDC, &logfont, &FontEnumProc, 0, 0);
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if (!g_bFontFound)
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{
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// needs to go to a fallback
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m_szName = UTL_INVAL_SYMBOL;
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return false;
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}
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}
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#endif
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m_hFont = ::CreateFontA(tall, 0, 0, 0,
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m_iWeight,
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flags & FONTFLAG_ITALIC,
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flags & FONTFLAG_UNDERLINE,
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flags & FONTFLAG_STRIKEOUT,
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charset,
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OUT_DEFAULT_PRECIS,
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CLIP_DEFAULT_PRECIS,
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m_bAntiAliased ? ANTIALIASED_QUALITY : NONANTIALIASED_QUALITY,
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DEFAULT_PITCH | FF_DONTCARE,
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windowsFontName);
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if (!m_hFont)
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{
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Error("Couldn't create windows font '%s'\n", windowsFontName);
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m_szName = UTL_INVAL_SYMBOL;
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return false;
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}
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// set as the active font
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::SetMapMode(m_hDC, MM_TEXT);
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::SelectObject(m_hDC, m_hFont);
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::SetTextAlign(m_hDC, TA_LEFT | TA_TOP | TA_UPDATECP);
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// get info about the font
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::TEXTMETRIC tm;
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memset( &tm, 0, sizeof( tm ) );
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if ( !GetTextMetrics(m_hDC, &tm) )
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{
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m_szName = UTL_INVAL_SYMBOL;
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return false;
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}
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m_iHeight = tm.tmHeight + m_iDropShadowOffset + 2 * m_iOutlineSize;
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m_iMaxCharWidth = tm.tmMaxCharWidth;
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m_iAscent = tm.tmAscent;
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// code for rendering to a bitmap
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m_rgiBitmapSize[0] = tm.tmMaxCharWidth + m_iOutlineSize * 2;
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m_rgiBitmapSize[1] = tm.tmHeight + m_iDropShadowOffset + m_iOutlineSize * 2;
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::BITMAPINFOHEADER header;
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memset(&header, 0, sizeof(header));
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header.biSize = sizeof(header);
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header.biWidth = m_rgiBitmapSize[0];
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header.biHeight = -m_rgiBitmapSize[1];
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header.biPlanes = 1;
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header.biBitCount = 32;
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header.biCompression = BI_RGB;
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m_hDIB = ::CreateDIBSection(m_hDC, (BITMAPINFO*)&header, DIB_RGB_COLORS, (void**)(&m_pBuf), NULL, 0);
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::SelectObject(m_hDC, m_hDIB);
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return true;
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}
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//-----------------------------------------------------------------------------
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// Purpose: writes the char into the specified 32bpp texture
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//-----------------------------------------------------------------------------
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void CWin32Font::GetCharRGBA(wchar_t ch, int rgbaWide, int rgbaTall, unsigned char *rgba)
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{
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int a, b, c;
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GetCharABCWidths(ch, a, b, c);
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// set us up to render into our dib
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::SelectObject(m_hDC, m_hFont);
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int wide = b;
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if ( m_bUnderlined )
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{
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wide += ( a + c );
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}
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int tall = m_iHeight;
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GLYPHMETRICS glyphMetrics;
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MAT2 mat2 = { { 0, 1}, { 0, 0}, { 0, 0}, { 0, 1}};
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int bytesNeeded = 0;
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bool bShouldAntialias = m_bAntiAliased;
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// filter out
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if ( ch > 0x00FF && !(m_iFlags & FONTFLAG_CUSTOM) )
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{
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bShouldAntialias = false;
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}
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if ( !s_bSupportsUnicode )
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{
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// win98 hack, don't antialias some characters that ::GetGlyphOutline() produces bad results for
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if (ch == 'I' || ch == '1')
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{
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bShouldAntialias = false;
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}
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// don't antialias big fonts at all (since win98 often produces bad results)
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if (m_iHeight >= 13)
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{
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bShouldAntialias = false;
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}
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}
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// only antialias latin characters, since it essentially always fails for asian characters
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if (bShouldAntialias)
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{
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// try and get the glyph directly
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::SelectObject(m_hDC, m_hFont);
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bytesNeeded = ::GetGlyphOutline(m_hDC, ch, GGO_GRAY8_BITMAP, &glyphMetrics, 0, NULL, &mat2);
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}
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if (bytesNeeded > 0)
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{
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// take it
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unsigned char *lpbuf = (unsigned char *)_alloca(bytesNeeded);
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::GetGlyphOutline(m_hDC, ch, GGO_GRAY8_BITMAP, &glyphMetrics, bytesNeeded, lpbuf, &mat2);
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// rows are on DWORD boundaries
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wide = glyphMetrics.gmBlackBoxX;
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while (wide % 4 != 0)
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{
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wide++;
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}
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// see where we should start rendering
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int pushDown = m_iAscent - glyphMetrics.gmptGlyphOrigin.y;
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// set where we start copying from
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int xstart = 0;
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// don't copy the first set of pixels if the antialiased bmp is bigger than the char width
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if ((int)glyphMetrics.gmBlackBoxX >= b + 2)
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{
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xstart = (glyphMetrics.gmBlackBoxX - b) / 2;
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}
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// iterate through copying the generated dib into the texture
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for (unsigned int j = 0; j < glyphMetrics.gmBlackBoxY; j++)
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{
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for (unsigned int i = xstart; i < glyphMetrics.gmBlackBoxX; i++)
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{
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int x = i - xstart + m_iBlur + m_iOutlineSize;
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int y = j + pushDown;
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if ((x < rgbaWide) && (y < rgbaTall))
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{
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unsigned char grayscale = lpbuf[(j*wide+i)];
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float r, g, b, a;
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if (grayscale)
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{
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r = g = b = 1.0f;
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a = (grayscale + 0) / 64.0f;
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if (a > 1.0f) a = 1.0f;
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}
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else
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{
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r = g = b = a = 0.0f;
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}
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// Don't want anything drawn for tab characters.
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if (ch == '\t')
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{
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r = g = b = 0;
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}
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unsigned char *dst = &rgba[(y*rgbaWide+x)*4];
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dst[0] = (unsigned char)(r * 255.0f);
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dst[1] = (unsigned char)(g * 255.0f);
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dst[2] = (unsigned char)(b * 255.0f);
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dst[3] = (unsigned char)(a * 255.0f);
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}
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}
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}
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}
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else
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{
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// use render-to-bitmap to get our font texture
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::SetBkColor(m_hDC, RGB(0, 0, 0));
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::SetTextColor(m_hDC, RGB(255, 255, 255));
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::SetBkMode(m_hDC, OPAQUE);
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if ( m_bUnderlined )
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{
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::MoveToEx(m_hDC, 0, 0, NULL);
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}
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else
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{
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::MoveToEx(m_hDC, -a, 0, NULL);
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}
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// render the character
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wchar_t wch = (wchar_t)ch;
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if (s_bSupportsUnicode)
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{
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// clear the background first
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RECT rect = { 0, 0, wide, tall};
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::ExtTextOutW( m_hDC, 0, 0, ETO_OPAQUE, &rect, NULL, 0, NULL );
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// just use the unicode renderer
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::ExtTextOutW( m_hDC, 0, 0, 0, NULL, &wch, 1, NULL );
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}
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else
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{
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// clear the background first (it may not get done automatically in win98/ME
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RECT rect = { 0, 0, wide, tall};
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::ExtTextOut(m_hDC, 0, 0, ETO_OPAQUE, &rect, NULL, 0, NULL);
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// convert the character using the current codepage
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char mbcs[6] = { 0 };
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::WideCharToMultiByte(CP_ACP, 0, &wch, 1, mbcs, sizeof(mbcs), NULL, NULL);
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::ExtTextOutA(m_hDC, 0, 0, 0, NULL, mbcs, strlen(mbcs), NULL);
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}
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::SetBkMode(m_hDC, TRANSPARENT);
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if (wide > m_rgiBitmapSize[0])
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{
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wide = m_rgiBitmapSize[0];
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}
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if (tall > m_rgiBitmapSize[1])
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{
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tall = m_rgiBitmapSize[1];
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}
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// iterate through copying the generated dib into the texture
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for (int j = (int)m_iOutlineSize; j < tall - (int)m_iOutlineSize; j++ )
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{
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// only copy from within the dib, ignore the outline border we are artificially adding
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for (int i = (int)m_iOutlineSize; i < wide - (int)m_iDropShadowOffset - (int)m_iOutlineSize; i++)
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{
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if ((i < rgbaWide) && (j < rgbaTall))
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{
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unsigned char *src = &m_pBuf[(i + j*m_rgiBitmapSize[0])*4];
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unsigned char *dst = &rgba[(i + j*rgbaWide)*4];
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// Don't want anything drawn for tab characters.
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unsigned char r, g, b;
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if ( ch == '\t' )
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{
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r = g = b = 0;
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}
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else
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{
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r = src[0];
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g = src[1];
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b = src[2];
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}
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// generate alpha based on luminance conversion
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dst[0] = r;
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dst[1] = g;
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dst[2] = b;
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dst[3] = (unsigned char)((float)r * 0.34f + (float)g * 0.55f + (float)b * 0.11f);
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}
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}
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}
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// if we have a dropshadow, we need to clean off the bottom row of pixels
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// this is because of a bug in winME that writes noise to them, only on the first time the game is run after a reboot
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// the bottom row should guaranteed to be empty to fit the dropshadow
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if ( m_iDropShadowOffset )
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{
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unsigned char *dst = &rgba[((m_iHeight - 1) * rgbaWide) * 4];
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for (int i = 0; i < wide; i++)
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{
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dst[0] = 0;
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dst[1] = 0;
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dst[2] = 0;
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dst[3] = 0;
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dst += 4;
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}
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}
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}
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// apply requested effects in specified order
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ApplyDropShadowToTexture( rgbaWide, rgbaTall, rgba, m_iDropShadowOffset );
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ApplyOutlineToTexture( rgbaWide, rgbaTall, rgba, m_iOutlineSize );
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ApplyGaussianBlurToTexture( rgbaWide, rgbaTall, rgba, m_iBlur );
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ApplyScanlineEffectToTexture( rgbaWide, rgbaTall, rgba, m_iScanLines );
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ApplyRotaryEffectToTexture( rgbaWide, rgbaTall, rgba, m_bRotary );
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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 CWin32Font::IsEqualTo(const char *windowsFontName, int tall, int weight, int blur, int scanlines, int flags)
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{
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if ( !stricmp(windowsFontName, m_szName.String() )
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&& m_iTall == tall
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&& m_iWeight == weight
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&& m_iBlur == blur
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&& m_iFlags == flags)
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return true;
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return false;
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}
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//-----------------------------------------------------------------------------
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// Purpose: returns true only if this font is valid for use
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//-----------------------------------------------------------------------------
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bool CWin32Font::IsValid()
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{
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if ( m_szName.IsValid() && m_szName.String()[0] )
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return true;
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return false;
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}
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//-----------------------------------------------------------------------------
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// Purpose: set the font to be the one to currently draw with in the gdi
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//-----------------------------------------------------------------------------
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void CWin32Font::SetAsActiveFont(HDC hdc)
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{
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Assert( IsValid() );
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::SelectObject( hdc, m_hFont );
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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 CWin32Font::GetCharABCWidths(int ch, int &a, int &b, int &c)
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{
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Assert( IsValid() );
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// look for it in the cache
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abc_cache_t finder = { (wchar_t)ch };
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unsigned short i = m_ExtendedABCWidthsCache.Find(finder);
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if (m_ExtendedABCWidthsCache.IsValidIndex(i))
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{
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a = m_ExtendedABCWidthsCache[i].abc.a;
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b = m_ExtendedABCWidthsCache[i].abc.b;
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c = m_ExtendedABCWidthsCache[i].abc.c;
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return;
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}
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// not in the cache, get from windows (this call is a little slow)
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ABC abc;
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if (::GetCharABCWidthsW(m_hDC, ch, ch, &abc) || ::GetCharABCWidthsA(m_hDC, ch, ch, &abc))
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{
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a = abc.abcA;
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b = abc.abcB;
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c = abc.abcC;
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}
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else
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{
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// wide character version failed, try the old api function
|
|
SIZE size;
|
|
char mbcs[6] = { 0 };
|
|
wchar_t wch = ch;
|
|
::WideCharToMultiByte(CP_ACP, 0, &wch, 1, mbcs, sizeof(mbcs), NULL, NULL);
|
|
if (::GetTextExtentPoint32(m_hDC, mbcs, strlen(mbcs), &size))
|
|
{
|
|
a = c = 0;
|
|
b = size.cx;
|
|
}
|
|
else
|
|
{
|
|
// failed to get width, just use the max width
|
|
a = c = 0;
|
|
b = m_iMaxCharWidth;
|
|
}
|
|
}
|
|
|
|
// add to the cache
|
|
finder.abc.a = a - m_iBlur - m_iOutlineSize;
|
|
finder.abc.b = b + ((m_iBlur + m_iOutlineSize) * 2) + m_iDropShadowOffset;
|
|
finder.abc.c = c - m_iBlur - m_iDropShadowOffset - m_iOutlineSize;
|
|
m_ExtendedABCWidthsCache.Insert(finder);
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: returns the height of the font, in pixels
|
|
//-----------------------------------------------------------------------------
|
|
int CWin32Font::GetHeight()
|
|
{
|
|
Assert( IsValid() );
|
|
return m_iHeight;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: returns the ascent of the font, in pixels (ascent=units above the base line)
|
|
//-----------------------------------------------------------------------------
|
|
int CWin32Font::GetAscent()
|
|
{
|
|
Assert( IsValid() );
|
|
return m_iAscent;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: returns the maximum width of a character, in pixels
|
|
//-----------------------------------------------------------------------------
|
|
int CWin32Font::GetMaxCharWidth()
|
|
{
|
|
Assert( IsValid() );
|
|
return m_iMaxCharWidth;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: returns the flags used to make this font, used by the dynamic resizing code
|
|
//-----------------------------------------------------------------------------
|
|
int CWin32Font::GetFlags()
|
|
{
|
|
return m_iFlags;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: Comparison function for abc widths storage
|
|
//-----------------------------------------------------------------------------
|
|
bool CWin32Font::ExtendedABCWidthsCacheLessFunc(const abc_cache_t &lhs, const abc_cache_t &rhs)
|
|
{
|
|
return lhs.wch < rhs.wch;
|
|
}
|
|
|
|
//-----------------------------------------------------------------------------
|
|
// Purpose: Get the kerned size of a char, for win32 just pass thru for now
|
|
//-----------------------------------------------------------------------------
|
|
void CWin32Font::GetKernedCharWidth( wchar_t ch, wchar_t chBefore, wchar_t chAfter, float &wide, float &abcA, float &abcC )
|
|
{
|
|
int a,b,c;
|
|
GetCharABCWidths(ch, a, b, c );
|
|
wide = ( a + b + c);
|
|
abcA = a;
|
|
abcC = c;
|
|
}
|
|
|
|
|