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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/***************************************************************************
* generator.cc
*
* Mon Nov 21 20:16:00 CEST 2016
* Copyright 2016 Lars Muldjord
* muldjordlars@gmail.com
****************************************************************************/
/*
* This file is part of DrumGizmo.
*
* DrumGizmo 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 3 of the License, or
* (at your option) any later version.
*
* DrumGizmo 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.
*
* You should have received a copy of the GNU Lesser General Public License
* along with DrumGizmo; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
*/
#include "generator.h"
#include <QLabel>
#include <QPushButton>
#include <QVBoxLayout>
#include <QImage>
#include <QPainter>
#include <QPen>
#include <QFont>
#define ALPHATHRES 150
#define FONTALPHA 80
#define EMBOSSALPHA 230
Generator::Generator()
{
QLabel *fontLabel = new QLabel("Font family:");
fontLineEdit = new QLineEdit("Arial");
QLabel *sizeLabel = new QLabel("Font px size:");
sizeLineEdit = new QLineEdit("13");
QLabel *outputLabel = new QLabel("Output file:");
outputLineEdit = new QLineEdit("../../plugingui/resources/font");
embossEnabled = new QCheckBox("Apply embossing");
QVBoxLayout *layout = new QVBoxLayout();
QPushButton *renderButton = new QPushButton("Generate");
connect(renderButton, SIGNAL(clicked()), this, SLOT(initGenerate()));
layout->addWidget(fontLabel);
layout->addWidget(fontLineEdit);
layout->addWidget(sizeLabel);
layout->addWidget(sizeLineEdit);
layout->addWidget(embossEnabled);
layout->addWidget(outputLabel);
layout->addWidget(outputLineEdit);
layout->addWidget(renderButton);
setLayout(layout);
}
Generator::~Generator()
{
}
void Generator::initGenerate()
{
qDebug("Generating font to file '%s' using font '%s' at size '%s'...",
outputLineEdit->text().toStdString().c_str(),
fontLineEdit->text().toStdString().c_str(),
sizeLineEdit->text().toStdString().c_str());
QList<QImage> chars;
maxSize = 100;
int vertOffset = 0;
int fontHeight = maxSize;
font.setFamily(fontLineEdit->text());
font.setPixelSize(sizeLineEdit->text().toInt());
font.setStretch(97);
font.setHintingPreference(QFont::PreferVerticalHinting);
setVertLimits(vertOffset, fontHeight);
for(int a = 0; a <= 255; ++a) {
int horizOffset = 0;
int charWidth = 0;
QImage image(maxSize, maxSize, QImage::Format_ARGB32);
image.fill(Qt::transparent);
if(a < 32 || (a > 126 && a < 160)) {
horizOffset = 0;
charWidth = 0;
} else {
setHorizLimits(horizOffset, charWidth, a, image);
}
if(a == 32) {
horizOffset = 0;
charWidth = sizeLineEdit->text().toInt() / 8;
}
QImage finalChar(image.copy(horizOffset, vertOffset, charWidth + 2, fontHeight));
QPainter p(&finalChar);
p.setPen(QPen(QColor(255, 0, 255)));
p.drawLine(finalChar.width() - 1, 0, finalChar.width() - 1, finalChar.height());
chars.append(finalChar);
}
assembleFinalFont(chars, fontHeight);
}
void Generator::setVertLimits(int &vertOffset, int &fontHeight)
{
QImage image(maxSize, maxSize, QImage::Format_ARGB32);
image.fill(Qt::transparent);
QPainter p(&image);
p.setPen(QPen(QColor(0, 0, 0, 255)));
p.setFont(font);
// Render all chars to give us a maximum overall font height
for(int a = 0; a <= 255; ++a) {
if(embossEnabled->isChecked()) {
p.setPen(QPen(QColor(255, 255, 255, EMBOSSALPHA)));
p.drawText(maxSize / 2, maxSize / 2 + 1, QChar(a));
p.setPen(QPen(QColor(0, 0, 0, 255)));
}
p.drawText(maxSize / 2, maxSize / 2, QChar(a));
}
vertOffset = getVertOffset(image);
fontHeight = getFontHeight(image, vertOffset);
}
void Generator::setHorizLimits(int &horizOffset, int &charWidth,
const int &curChar, QImage &image)
{
QPainter p(&image);
p.setPen(QPen(QColor(0, 0, 0, 255)));
p.setFont(font);
if(embossEnabled->isChecked()) {
p.setPen(QPen(QColor(255, 255, 255, EMBOSSALPHA)));
p.drawText(maxSize / 2, maxSize / 2 + 1, QChar(curChar));
p.setPen(QPen(QColor(0, 0, 0, 255)));
}
// Draw twice to make it clearer
p.drawText(maxSize / 2, maxSize / 2, QChar(curChar));
p.setPen(QPen(QColor(0, 0, 0, FONTALPHA)));
p.drawText(maxSize / 2, maxSize / 2, QChar(curChar));
horizOffset = getHorizOffset(image);
charWidth = getFontWidth(image, horizOffset);
}
int Generator::getVertOffset(const QImage &image)
{
for(int y = 0; y < maxSize; ++y) {
for(int x = 0; x < maxSize; ++x) {
if(qAlpha(image.pixel(x, y)) != 0) {
return y;
}
}
}
return 0;
}
int Generator::getFontHeight(const QImage &image, const int &vertOffset)
{
for(int y = maxSize - 1; y > vertOffset; --y) {
for(int x = 0; x < maxSize; ++x) {
if(qAlpha(image.pixel(x, y)) != 0) {
return y + 1 - vertOffset;
}
}
}
return 0;
}
int Generator::getHorizOffset(const QImage &image)
{
for(int x = 0; x < maxSize; ++x) {
for(int y = 0; y < maxSize; ++y) {
// Check for alpha threshold to make sure we don't get too much space between chars
if(qAlpha(image.pixel(x, y)) > ALPHATHRES) {
return x;
}
}
}
return 0;
}
int Generator::getFontWidth(const QImage &image, const int &horizOffset)
{
for(int x = maxSize - 1; x > horizOffset; --x) {
for(int y = 0; y < maxSize; ++y) {
// Check for alpha threshold to make sure we don't get too much space between chars
if(qAlpha(image.pixel(x, y)) > ALPHATHRES) {
return x + 1 - horizOffset;
}
}
}
return 0;
}
void Generator::assembleFinalFont(const QList<QImage> &chars, const int &fontHeight)
{
int imageWidth = 0;
for(int a = 0; a < chars.length(); ++a) {
imageWidth += chars.at(a).width();
}
QImage finalFont(imageWidth, fontHeight, QImage::Format_ARGB32);
finalFont.fill(Qt::transparent);
QPainter p(&finalFont);
int curOffset = 0;
for(int a = 0; a < chars.length(); ++a) {
p.drawImage(curOffset, 0, chars.at(a));
curOffset += chars.at(a).width();
}
finalFont.save(outputLineEdit->text() + ".png");
}
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