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// ==============================================================
// This file is part of Glest Shared Library (www.glest.org)
//
// Copyright (C) 2001-2008 Martio Figueroa
//
// You can redistribute this code and/or modify it under
// the terms of the GNU General Public License as published
// by the Free Software Foundation; either version 2 of the
// License, or (at your option) any later version
// ==============================================================
#include "text_renderer_gl.h"
#include "opengl.h"
#include "font_gl.h"
#include "leak_dumper.h"
namespace Shared{ namespace Graphics{ namespace Gl{
// =====================================================
// class TextRenderer2DGl
// =====================================================
TextRenderer2DGl::TextRenderer2DGl(){
rendering= false;
}
void TextRenderer2DGl::begin(const Font2D *font){
assert(!rendering);
rendering= true;
this->font= static_cast<const Font2DGl*>(font);
}
void TextRenderer2DGl::render(const string &text, int x, int y, bool centered){
assert(rendering);
assertGl();
int line=0;
int size= font->getSize();
const unsigned char *utext= reinterpret_cast<const unsigned char*>(text.c_str());
Vec2f rasterPos;
const FontMetrics *metrics= font->getMetrics();
if(centered){
rasterPos.x= x-metrics->getTextWidth(text)/2.f;
rasterPos.y= y+metrics->getHeight()/2.f;
}
else{
rasterPos= Vec2f(static_cast<float>(x), static_cast<float>(y));
}
glRasterPos2f(rasterPos.x, rasterPos.y);
for (int i=0; utext[i]!='\0'; ++i) {
switch(utext[i]){
case '\t':
rasterPos= Vec2f((rasterPos.x/size+3.f)*size, y-(size+1.f)*line);
glRasterPos2f(rasterPos.x, rasterPos.y);
break;
case '\n':
line++;
rasterPos= Vec2f(static_cast<float>(x), y-(metrics->getHeight()*2.f)*line);
glRasterPos2f(rasterPos.x, rasterPos.y);
break;
default:
glCallList(font->getHandle()+utext[i]);
}
}
assertGl();
}
void TextRenderer2DGl::end(){
assert(rendering);
rendering= false;
}
// =====================================================
// class TextRenderer3DGl
// =====================================================
TextRenderer3DGl::TextRenderer3DGl(){
rendering= false;
}
void TextRenderer3DGl::begin(const Font3D *font){
assert(!rendering);
rendering= true;
this->font= static_cast<const Font3DGl*>(font);
assertGl();
//load color
glPushAttrib(GL_TRANSFORM_BIT);
assertGl();
}
void TextRenderer3DGl::render(const string &text, float x, float y, float size, bool centered){
assert(rendering);
assertGl();
const unsigned char *utext= reinterpret_cast<const unsigned char*>(text.c_str());
glMatrixMode(GL_MODELVIEW);
glPushMatrix();
glPushAttrib(GL_POLYGON_BIT);
float scale= size/10.f;
if(centered){
const FontMetrics *metrics= font->getMetrics();
glTranslatef(x-scale*metrics->getTextWidth(text)/2.f, y-scale*metrics->getHeight()/2.f, 0);
}
else{
glTranslatef(x-scale, y-scale, 0);
}
glScalef(scale, scale, scale);
for (int i=0; utext[i]!='\0'; ++i) {
glCallList(font->getHandle()+utext[i]);
}
glPopMatrix();
glPopAttrib();
assertGl();
}
void TextRenderer3DGl::end(){
assert(rendering);
rendering= false;
assertGl();
glPopAttrib();
assertGl();
}
}}}//end namespace
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