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// C_FontGL
//class to print .ttf OS specific fonts with opengl.
//the non WIN32 version of this class is only for linux
// and it is not well tested since it is not used in the game
#include "glfont.h"
#include <stdio.h>
#ifdef WIN32
#pragma comment (lib, "opengl32.lib")
#endif
#define CHARS_BASE 32
#define CHARS_COUNT (256-32)
C_FontGL::C_FontGL()
{
m_hListBase = 0;
m_pGraph = C_GraphWrapperGL::GetGraphWrapperObject();
m_stColor = S_FCOLORMAKE(1.0f, 1.0f, 1.0f, 1.0f); //white
}
C_FontGL::~C_FontGL()
{
Free();
}
void C_FontGL::Free()
{
if(m_hListBase) {
glDeleteLists(m_hListBase, CHARS_COUNT);
}
}
bool C_FontGL::Load(char *szFontname, int iFontHeight, int iThickness, bool bUnderLined, bool bItallic)
{
int i;
bool bResult = false;
m_hListBase = glGenLists(CHARS_COUNT);
#ifdef WIN32
HFONT hFont; // Windows Font ID
HFONT hOldFont; // Used For Good House Keeping
hFont = CreateFont(
iFontHeight, // Height Of Font
0, // Width Of Font
0, // Angle Of Escapement
0, // Orientation Angle
iThickness, // Font Weight
bItallic, // Italic
bUnderLined, // Underline
false, // Strikeout
ANSI_CHARSET, // Character Set Identifier
OUT_TT_PRECIS, // Output Precision
CLIP_DEFAULT_PRECIS, // Clipping Precision
ANTIALIASED_QUALITY, // Output Quality
FF_DONTCARE|DEFAULT_PITCH, // Family And Pitch
szFontname);
if(hFont==NULL) goto error;
HDC hDC = m_pGraph->GetWindowDC();
hOldFont = (HFONT)SelectObject(hDC, hFont); // Selects The Font We Want
TEXTMETRIC stTM;
GetTextMetrics(hDC, &stTM);
m_iCharHeight = stTM.tmHeight;
m_iTotalHeight = /*stTM.tmInternalLeading +*/0+ stTM.tmHeight;
m_iBelowBaseline = stTM.tmDescent;
ABC astWidth[256];
BOOL bWidthResult = GetCharABCWidths(hDC, 0, 255, astWidth);
if(bWidthResult) {
for(i=0; i<256; i++) {
m_aiWidthA[i] = astWidth[i].abcA;
m_aiWidthB[i] = astWidth[i].abcB;
m_aiWidthC[i] = astWidth[i].abcC;
m_aiWidth[i] = astWidth[i].abcA + astWidth[i].abcB + astWidth[i].abcC;
}
} else {
bWidthResult = GetCharWidth(hDC, 0, 255, m_aiWidth);
if(!bWidthResult) goto error;
for(i=0; i<256; i++) {
m_aiWidthA[i] = 0;
m_aiWidthB[i] = m_aiWidth[i];
m_aiWidthC[i] = 0;
}
}
bResult = (wglUseFontBitmaps(hDC, CHARS_BASE, CHARS_COUNT, m_hListBase) != 0); // Builds Characters Starting At Character CHARS_BASE
SelectObject(hDC, hOldFont);
DeleteObject(hFont);
#else
Display *pDisplay;
XFontStruct *pFontInfo;
int iFirst, iLast;
//need an X Display before calling any Xlib routines
pDisplay = m_pGraph->GetDisplay();
if(!pDisplay) goto error;
//load the font
pFontInfo = XLoadQueryFont(pDisplay, szFontname);
if(!pFontInfo) goto error;
m_iBelowBaseline = 0; //?
//tell GLX which font & glyphs to use
iFirst = pFontInfo->min_char_or_byte2;
iLast = pFontInfo->max_char_or_byte2;
glXUseXFont(pFontInfo->fid, iFirst, iLast-iFirst+1, 0+iFirst);
char szString[2];
szString[1] = 0;
for(i=0; i<256; i++) {
szString[0] = i;
m_aiWidth[i] = XTextWidth(pFontInfo, szString, 1);
m_aiWidthA[i] = 0; //?
m_aiWidthB[i] = m_aiWidth[i]; //?
m_aiWidthC[i] = 0; //?
}
m_iTotalHeight = (pFontInfo->max_bounds.ascent-pFontInfo->min_bounds.ascent) + pFontInfo->max_bounds.descent; //?
m_iCharHeight = iFontHeight; //?
XFreeFont(pDisplay, pFontInfo);
bResult = true;
#endif
error:
return bResult;
}
bool C_FontGL::GetHeights(int *o_iChar, int *o_iTotal, int *o_BelowBaseline)
{
if(o_iChar) *o_iChar = m_iCharHeight;
if(o_iTotal) *o_iTotal = m_iTotalHeight;
if(o_BelowBaseline) *o_BelowBaseline = m_iBelowBaseline;
return (o_iChar || o_iTotal || m_iBelowBaseline);
}
int C_FontGL::GetWidth(const char *szFmt, ...)
{
va_list stPList;
char szText[512];
if(szFmt == NULL) return 0;
va_start(stPList, szFmt);
vsprintf(szText, szFmt, stPList);
va_end(stPList);
int iWidth = 0;
int i, iSize = (int)strlen(szText);
for(i=0; i<iSize; i++) {
iWidth += m_aiWidth[(unsigned char)szText[i]];
}
return iWidth;
}
bool C_FontGL::GetCharWidths(const char cChar, int *o_iPreX, int *o_iCharX, int *o_iPostX)
{
if(o_iPreX) *o_iPreX = m_aiWidthA[(unsigned char)cChar];
if(o_iCharX) *o_iCharX = m_aiWidthB[(unsigned char)cChar];
if(o_iPostX) *o_iPostX = m_aiWidthC[(unsigned char)cChar];
return true;
}
void C_FontGL::Print(int iX, int iY, const char *szFmt, ...)
{
va_list stPList;
char szText[512];
int iBase = CHARS_BASE;
if(szFmt == NULL) return;
va_start(stPList, szFmt);
vsprintf(szText, szFmt, stPList);
va_end(stPList);
GLboolean bTexture = glIsEnabled(GL_TEXTURE_2D);
if(bTexture) glDisable(GL_TEXTURE_2D);
glColor4fv(&m_stColor.r);
glRasterPos2f((float)iX, (float)(m_pGraph->GetModeHeight()-iY));
glPushAttrib(GL_LIST_BIT);
#ifndef WIN32
iBase = 1;
#endif
glListBase(m_hListBase - iBase);
glCallLists((int)strlen(szText), GL_UNSIGNED_BYTE, szText);
glPopAttrib();
if(bTexture) glEnable(GL_TEXTURE_2D);
}
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