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/*
* Copyright (c) 2002-2006 Samit Basu
*
* This program is free software; you can redistribute it 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.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
*/
#include "GLLabel.hpp"
#include "qimage.h"
#include "qpainter.h"
namespace FreeMat {
std::string GLLabel::Text() {
return text;
}
GLLabel::GLLabel() {
bits = NULL;
}
GLLabel::GLLabel(QFont fnt, std::string txt, GLubyte r, GLubyte g, GLubyte b) {
text = txt;
red = r;
green = g;
blue = b;
QFontMetrics fm(fnt);
QRect sze(fm.boundingRect(txt.c_str()));
x0 = sze.left();
y0 = sze.bottom();
width = sze.width()+fm.width("W");
height = sze.height();
QImage img(width,height,QImage::Format_RGB32);
QPainter pnt(&img);
pnt.setRenderHint(QPainter::TextAntialiasing);
pnt.setRenderHint(QPainter::Antialiasing);
pnt.setBackground(QColor(255,255,255));
pnt.eraseRect(0,0,width,height);
pnt.setFont(fnt);
pnt.setPen(QColor(0,0,0));
pnt.drawText(x0,height-y0-1,text.c_str());
pnt.end();
// Figure out what the minimum bounding box is...
int newwidth = 0;
for (int j=0;j<height;j++) {
QRgb* ibits = (QRgb*) img.scanLine(j);
int k=width-1;
while ((qRed(ibits[k])==255) && (k>=0))
k--;
newwidth = (newwidth < k) ? k : newwidth;
}
width = newwidth+1;
// Now, we generate a synthetic image that is of the same size
pic = QImage(width,height,QImage::Format_ARGB32);
// Set the color bits to all be the same color as specified
// in the argument list, and use the grey scale to modulate
// the transparency
for (int i=0;i<height;i++) {
QRgb* ibits = (QRgb*) img.scanLine(i);
QRgb* obits = (QRgb*) pic.scanLine(height-1-i);
for (int j=0;j<width;j++)
obits[j] = qRgba(red,green,blue,255-qRed(ibits[j]));
}
// pic = QGLWidget::convertToGLFormat(pic);
}
int GLLabel::twidth() {
return width;
}
int GLLabel::theight() {
return height;
}
int GLLabel::xoffset(AlignmentFlag xflag) {
if (xflag == Mean)
return -width/2;
else if (xflag == Max)
return -width;
else
return 0;
}
int GLLabel::yoffset(AlignmentFlag yflag) {
if (yflag == Mean)
return -height/2;
else if (yflag == Max)
return -height;
else
return 0;
}
void GLLabel::DrawMe(QGLWidget *widget, int x, int y,
AlignmentFlag xflag, AlignmentFlag yflag) {
y -= y0;
if (xflag == Mean)
x -= width/2;
else if (xflag == Max)
x -= width;
if (yflag == Mean)
y -= height/2;
else if (yflag == Max)
y -= height;
int txid = widget->bindTexture(pic);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MIN_FILTER,GL_NEAREST);
glTexParameteri(GL_TEXTURE_2D,GL_TEXTURE_MAG_FILTER,GL_NEAREST);
glBegin(GL_QUADS);
glTexCoord2d(0,0);
glVertex2d(x,y);
glTexCoord2d(1,0);
glVertex2d(x+width+1,y);
glTexCoord2d(1,1);
glVertex2d(x+width+1,y+height+1);
glTexCoord2d(0,1);
glVertex2d(x,y+height+1);
glEnd();
widget->deleteTexture(txid);
}
GLLabel::~GLLabel() {
}
}
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