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// This file is part of BOINC.
// http://boinc.berkeley.edu
// Copyright (C) 2010 University of California
//
// BOINC is free software; you can redistribute it and/or modify it
// under the terms of the GNU Lesser General Public License
// as published by the Free Software Foundation,
// either version 3 of the License, or (at your option) any later version.
//
// BOINC is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with BOINC. If not, see <http://www.gnu.org/licenses/>.
// utility functions for TrueType font OpenGL graphics
// FTGL OpenGL TrueType/FreeType font rendering
// you will need to build & link against freetype2 and ftgl
// tested using ftgl version 2.1.3 rc5 and freetype version 2.4.10
// ftgl library: http://sourceforge.net/projects/ftgl/files/FTGL%20Source/
// freetype2 library: http://www.freetype.org/
// this should basically be a drop-in for the old boinc txf_* functions i.e.
// txf_load_fonts and txf_render_string,
// with extra options on the latter for rotating etc
// originally adapted by Carl Christensen
#if defined(_WIN32) && !defined(__STDWX_H__) && !defined(_BOINC_WIN_) && !defined(_AFX_STDAFX_H_)
#include "boinc_win.h"
#endif
#include "boinc_gl.h"
#include <FTGL/ftgl.h>
#include "ttfont.h"
#include "filesys.h" // from boinc for file_exists
// I put in it's own namespace so call TTFont::ttf_load_fonts() etc
//
namespace TTFont {
// The Liberation version 2.00.0 fonts referenced below are free
// fonts under the SIL Open Font License version 1.1. You can
// download the license and fonts from
// https://fedorahosted.org/liberation-fonts
//
// Another source of free fonts is the GNU FreeFont project
// at http://www.gnu.org/software/freefont
// you'll want to define a 2-d array of char as appropriate for your
// truetype font filenames (path is set in the call to ttf_load_fonts)
//
static const char *g_cstrFont[] = {
"LiberationSans-Regular.ttf", // 0, this is the default
"LiberationSans-Bold.ttf", // 1
"LiberationSans-Italic.ttf", // 2
"LiberationSans-BoldItalic.ttf", // 3
"LiberationSerif-Regular.ttf", // 4
"LiberationSerif-Bold.ttf", // 5
"LiberationSerif-Italic.ttf", // 6
"LiberationSerif-BoldItalic.ttf", // 7
"LiberationMono-Regular.ttf", // 8
"LiberationMono-Bold.ttf", // 9
"LiberationMono-Italic.ttf", // 10
"LiberationMono-BoldItalic.ttf" // 11
};
// define the number of fonts supported
#define NUM_FONT (sizeof(g_cstrFont) / sizeof(char*))
FTFont* g_font[NUM_FONT];
int g_iFont = -1;
// Load fonts. call once.
// Pass in the font directory (normally the project directory:
// APP_INIT_DATA::project_dir for BOINC apps),
// and any special-scaling font name & size
// (e.g. if I want a huge typeface for Sans-Serif Regular
// then I pass in "LiberationSans-Regular.ttf", 3000)
//
void ttf_load_fonts(
const char* dir, const char* strScaleFont, const int& iScaleFont
) {
static bool bInit = false;
// flag so we don't call again, otherwise we'll have memory leaks
// each subsequent call to new FTTextureFont etc
if (bInit) return; // we've already been here
bInit = true; // we're in now!
ttf_cleanup();
memset(g_font, 0x00, sizeof(FTFont*) * NUM_FONT);
// initialize to null's for error checking later
char vpath[MAXPATHLEN];
g_iFont = -1;
for (unsigned int i=0 ; i < NUM_FONT; i++){
sprintf(vpath, "%s/%s", dir, g_cstrFont[i]);
if (boinc_file_exists(vpath)) {
//g_font[i] = new FTBitmapFont(vpath);
//g_font[i] = new FTPixmapFont(vpath);
//g_font[i] = new FTPolygonFont(vpath);
g_font[i] = new FTTextureFont(vpath);
if(!g_font[i]->Error()) {
#ifdef _DEBUG
fprintf(stderr, "Successfully loaded '%s'...\n", vpath);
#endif
int iScale = 30;
if (strScaleFont && !strcmp(strScaleFont, g_cstrFont[i])) iScale = iScaleFont;
if(!g_font[i]->FaceSize(iScale)) {
fprintf(stderr, "Failed to set size");
}
g_font[i]->Depth(3.);
g_font[i]->Outset(-.5f, 1.5f);
g_font[i]->CharMap(ft_encoding_unicode);
g_iFont = i;
}
#ifdef _DEBUG
else {
fprintf(stderr, "Failed to load '%s'...\n", vpath);
}
#endif
}
}
}
// remove our objects
//
void ttf_cleanup() {
for (unsigned int i = 0; i < NUM_FONT; i++) {
if (g_font[i]) {
delete g_font[i];
g_font[i] = NULL;
}
}
}
void ttf_render_string(
const double& x,
const double& y,
const double& z, // text position
const float& fscale, // scale factor
const GLfloat* col, // colour 4vf
const char* s, // string ptr
const int& iFont, // font index
const float& fRotAngle, // optional rotation angle
const float& fRotX, // optional rotation vector for X
const float& fRotY, // optional rotation vector for Y
const float& fRotZ, // optional rotation vector for Z
const float& fRadius // circular radius to draw along
) {
// http://ftgl.sourceforge.net/docs/html/
// if requested font isn't available, find first one that is
//
unsigned int theFont = iFont;
while((theFont < NUM_FONT) && !g_font[theFont]) theFont++;
if((theFont >= NUM_FONT) || !g_font[theFont]) {
// bad font index
return;
}
int renderMode = FTGL::RENDER_FRONT; //ALL; //FRONT | FTGL::FTGL_RENDER_BACK;
glColor4fv(col);
glPushMatrix();
glTranslated(x, y, z);
glScaled(1.0f / fscale, 1.0f / fscale, 1.0f / fscale);
glEnable(GL_TEXTURE_2D);
if (fRotAngle != 0.0f) {
glRotatef(fRotAngle, fRotX, fRotY, fRotZ);
}
if (fRadius == 0.0f) {
g_font[theFont]->Render(s, -1, FTPoint(), FTPoint(), renderMode);
}
else {
int i = 0;
float fAdvance = 1.0f;
while ( *(s+i) ) {
fAdvance = g_font[theFont]->Advance((s+i), 1, FTPoint());
g_font[theFont]->Render((s+i), 1, FTPoint(), FTPoint(), renderMode);
glTranslated(fAdvance, 0.0f, 0.0f);
glRotatef(fRadius * fAdvance / (float) 20.0f, 0.0f, 0.0f, 1.0f);
i++;
}
}
glDisable(GL_TEXTURE_2D);
glPopMatrix();
}
} // namespace
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