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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copyright (C) 2010 Robert Bieber
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "rbfont.h"
#include "rbfontcache.h"
#include "rbtextcache.h"
#include <QFont>
#include <QBrush>
#include <QFile>
#include <QPainter>
#include <QBitmap>
#include <QImage>
#include <QSettings>
#include <QDebug>
quint16 RBFont::maxFontSizeFor16BitOffsets = 0xFFDB;
RBFont::RBFont(QString file)
: valid(false), imageData(0), offsetData(0), widthData(0)
{
/* Attempting to locate the correct file name */
if(!QFile::exists(file))
{
/* Checking in the fonts repository */
QSettings settings;
settings.beginGroup("RBFont");
file = file.split("/").last();
file = settings.value("fontDir", "").toString() + "/" + file;
settings.endGroup();
if(!QFile::exists(file))
file = ":/fonts/08-Schumacher-Clean.fnt";
}
header.insert("filename", file);
/* Checking for a cache entry */
RBFontCache::CacheInfo* cache = RBFontCache::lookup(file);
if(cache)
{
imageData = cache->imageData;
offsetData = cache->offsetData;
widthData = cache->widthData;
header = cache->header;
return;
}
/* Opening the file */
QFile fin(file);
fin.open(QFile::ReadOnly);
/* Loading the header info */
quint8 byte;
quint16 word;
quint32 dword;
QDataStream data(&fin);
data.setByteOrder(QDataStream::LittleEndian);
/* Grabbing the magic number and version */
data >> dword;
header.insert("version", dword);
/* Max font width */
data >> word;
header.insert("maxwidth", word);
/* Font height */
data >> word;
header.insert("height", word);
/* Ascent */
data >> word;
header.insert("ascent", word);
/* Padding */
data >> word;
/* First character code */
data >> dword;
header.insert("firstchar", dword);
/* Default character code */
data >> dword;
header.insert("defaultchar", dword);
/* Number of characters */
data >> dword;
header.insert("size", dword);
/* Bytes of imagebits in file */
data >> dword;
header.insert("nbits", dword);
/* Longs (dword) of offset data in file */
data >> dword;
header.insert("noffset", dword);
/* Bytes of width data in file */
data >> dword;
header.insert("nwidth", dword);
/* Loading the image data */
imageData = new quint8[header.value("nbits").toInt()];
data.readRawData(reinterpret_cast<char*>(imageData),
header.value("nbits").toInt());
/* Aligning on 16-bit boundary */
if(header.value("nbits").toInt() % 2 == 1)
data >> byte;
/* Loading the offset table if necessary */
if(header.value("noffset").toInt() > 0)
{
int bytesToRead;
if(header.value("nbits").toInt() > maxFontSizeFor16BitOffsets)
bytesToRead = 4 * header.value("noffset").toInt();
else
bytesToRead = 2 * header.value("noffset").toInt();
offsetData = new quint16[bytesToRead];
data.readRawData(reinterpret_cast<char*>(offsetData), bytesToRead);
}
/* Loading the width table if necessary */
if(header.value("nwidth").toInt() > 0)
{
widthData = new quint8[header.value("nwidth").toInt()];
data.readRawData(reinterpret_cast<char*>(widthData),
header.value("nwidth").toInt());
}
fin.close();
/* Caching the font data */
cache = new RBFontCache::CacheInfo;
cache->imageData = imageData;
cache->offsetData = offsetData;
cache->widthData = widthData;
cache->header = header;
RBFontCache::insert(file, cache);
}
RBFont::~RBFont()
{
}
RBText* RBFont::renderText(QString text, QColor color, int viewWidth,
QGraphicsItem *parent)
{
/* Checking for a cache hit first */
QImage* image = RBTextCache::lookup(header.value("filename").toString()
+ text);
if(image)
return new RBText(image, viewWidth, parent);
int firstChar = header.value("firstchar").toInt();
int height = header.value("height").toInt();
int maxWidth = header.value("maxwidth").toInt();
bool extendedSet = header.value("nbits").
toUInt() > maxFontSizeFor16BitOffsets;
/* First we determine the width of the combined text */
QList<int> widths;
for(int i = 0; i < text.length(); i++)
{
if(widthData)
widths.append(widthData[text[i].unicode() - firstChar]);
else
widths.append(maxWidth);
}
int totalWidth = 0;
for(int i = 0; i < widths.count(); i++)
totalWidth += widths[i];
image = new QImage(totalWidth, height, QImage::Format_Indexed8);
image->setColor(0, qRgba(0,0,0,0));
image->setColor(1, color.rgb());
/* Drawing the text */
int startX = 0;
for(int i = 0; i < text.length(); i++)
{
unsigned int offset;
if(offsetData)
{
if(extendedSet)
offset = reinterpret_cast<quint32*>(offsetData)[text[i].unicode() - firstChar];
else
offset = offsetData[text[i].unicode() - firstChar];
}
else
{
offset = (text[i].unicode() - firstChar) * maxWidth;
}
int bytesHigh = height / 8;
if(height % 8 > 0)
bytesHigh++;
int bytes = bytesHigh * widths[i];
for(int byte = 0; byte < bytes; byte++)
{
int x = startX + byte % widths[i];
int y = byte / widths[i] * 8;
quint8 data = imageData[offset];
quint8 mask = 0x1;
for(int bit = 0; bit < 8; bit++)
{
if(mask & data)
image->setPixel(x, y, 1);
else
image->setPixel(x, y, 0);
y++;
mask <<= 1;
if(y >= height)
break;
}
offset++;
}
startX += widths[i];
}
RBTextCache::insert(header.value("filename").toString() + text, image);
return new RBText(image, viewWidth, parent);
}
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