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// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This 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 2.1 of the License, or (at your option) any later version.
//
// This software 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.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
// Interface functions for tex_info stuff.
// Contributed by Tolu Aina
#ifdef _WIN32
#include "boinc_win.h"
#endif
#include "filesys.h"
#include "boinc_api.h"
#include "texfont.h"
#include "txf_util.h"
#ifndef _MAX_PATH
#define _MAX_PATH 256
#endif
static TexFont* txf[TXF_NUM_FONT];
// load fonts. call once.
//
void txf_load_fonts(char* dir) {
char vpath[_MAX_PATH], phys_path[_MAX_PATH];
for (int i=0 ; i<TXF_NUM_FONT; i++){
sprintf(vpath, "%s/%s", dir, font_names[i]);
boinc_resolve_filename(vpath, phys_path, sizeof(phys_path));
if (is_file(phys_path)) {
txf[i] = txfLoadFont(phys_path);
if(txf[i]) CreateTexFont(txf[i], 0, GL_TRUE);
}
}
}
void txf_render_string(
float alpha_value,
// reference value to which incoming alpha values are compared.
// 0 through to 1
double x, double y, double z, // text position
float fscale, // scale factor
GLfloat * col, // colour
int i, // font index see texfont.h
char * s // string ptr
){
glPushMatrix();
glEnable(GL_TEXTURE_2D);
if((i < TXF_NUM_FONT) && txf[i]) {
glBindTexture(GL_TEXTURE_2D, txf[i]->texobj);
glTranslated(x, y, z);
glScalef(1/fscale, 1/fscale, 1/fscale);
glEnable(GL_ALPHA_TEST);
// use .1 and .5 for a dark and bright background respectively
glAlphaFunc(GL_GEQUAL, alpha_value);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glColor4fv(col);
txfRenderString(txf[i], s, (int)strlen(s));
}
glDisable(GL_TEXTURE_2D);
glPopMatrix();
}
#if 0
int main (){
// usage:
// first parameter is alpha value : use .1 and .5 for dark and bright background seems to work
// 7th can probably be list of #defines of font names.
render_string(.1f, -1, -1, 0, 200.0f, white, 0, "hello world.");
}
#endif
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