mirror of https://github.com/BOINC/boinc.git
90 lines
2.6 KiB
C
90 lines
2.6 KiB
C
// Berkeley Open Infrastructure for Network Computing
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// http://boinc.berkeley.edu
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// Copyright (C) 2005 University of California
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//
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// This is free software; you can redistribute it and/or
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// modify it under the terms of the GNU Lesser General Public
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// License as published by the Free Software Foundation;
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// either version 2.1 of the License, or (at your option) any later version.
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//
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// This software is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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// See the GNU Lesser General Public License for more details.
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//
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// To view the GNU Lesser General Public License visit
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// http://www.gnu.org/copyleft/lesser.html
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// or write to the Free Software Foundation, Inc.,
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// 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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// Interface functions for tex_info stuff.
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// Contributed by Tolu Aina
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#ifdef _WIN32
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#include "boinc_win.h"
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#endif
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#include "filesys.h"
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#include "texfont.h"
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#include "txf_util.h"
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#ifndef _MAX_PATH
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#define _MAX_PATH 256
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#endif
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static TexFont* txf[TXF_NUM_FONT];
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// load fonts. call once.
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//
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void txf_load_fonts(char* dir) {
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char filename[_MAX_PATH];
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for (int i=0 ; i<TXF_NUM_FONT; i++){
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sprintf(filename, "%s/%s", dir, font_names[i]);
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if (is_file(filename)) {
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txf[i] = txfLoadFont(filename);
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if(txf[i]) CreateTexFont(txf[i], 0, GL_TRUE);
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}
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}
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}
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void txf_render_string(
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float alpha_value,
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// reference value to which incoming alpha values are compared.
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// 0 through to 1
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double x, double y, double z, // text position
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float fscale, // scale factor
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GLfloat * col, // colour
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int i, // font index see texfont.h
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char * s // string ptr
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){
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glPushMatrix();
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glEnable(GL_TEXTURE_2D);
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if((i < TXF_NUM_FONT) && txf[i]) {
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glBindTexture(GL_TEXTURE_2D, txf[i]->texobj);
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glTranslated(x, y, z);
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glScalef(1/fscale, 1/fscale, 1/fscale);
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glEnable(GL_ALPHA_TEST);
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// use .1 and .5 for a dark and bright background respectively
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glAlphaFunc(GL_GEQUAL, alpha_value);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
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glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
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glColor4fv(col);
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txfRenderString(txf[i], s, (int)strlen(s));
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}
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glDisable(GL_TEXTURE_2D);
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glPopMatrix();
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}
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#if 0
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int main (){
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// usage:
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// first parameter is alpha value : use .1 and .5 for dark and bright background seems to work
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// 7th can probably be list of #defines of font names.
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render_string(.1f, -1, -1, 0, 200.0f, white, 0, "hello world.");
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}
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#endif
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