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// -*- c-basic-offset: 4 -*-
/*
Rosegarden-4
A sequencer and musical notation editor.
This program is Copyright 2000-2005
Guillaume Laurent <glaurent@telegraph-road.org>,
Chris Cannam <cannam@all-day-breakfast.com>,
Richard Bown <bownie@bownie.com>
The moral right of the authors to claim authorship of this work
has been asserted.
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. See the file
COPYING included with this distribution for more information.
*/
#include "pixmapfunctions.h"
#include "rosedebug.h"
#include <qimage.h>
#include <qpainter.h>
#include <iostream>
QBitmap
PixmapFunctions::generateMask(const QPixmap &map, const QRgb &px)
{
QImage i(map.convertToImage());
QImage im(i.width(), i.height(), 1, 2, QImage::LittleEndian);
for (int y = 0; y < i.height(); ++y) {
for (int x = 0; x < i.width(); ++x) {
if (i.pixel(x, y) != px) {
im.setPixel(x, y, 1);
} else {
im.setPixel(x, y, 0);
}
}
}
QBitmap m;
m.convertFromImage(im);
return m;
}
QBitmap
PixmapFunctions::generateMask(const QPixmap &map)
{
QImage i(map.convertToImage());
QImage im(i.width(), i.height(), 1, 2, QImage::LittleEndian);
QRgb px0(i.pixel(0, 0));
QRgb px1(i.pixel(i.width()-1, 0));
QRgb px2(i.pixel(i.width()-1, i.height()-1));
QRgb px3(i.pixel(0, i.height()-1));
QRgb px(px0);
if (px0 != px2 && px1 == px3) px = px1;
for (int y = 0; y < i.height(); ++y) {
for (int x = 0; x < i.width(); ++x) {
if (i.pixel(x, y) != px) {
im.setPixel(x, y, 1);
} else {
im.setPixel(x, y, 0);
}
}
}
QBitmap m;
m.convertFromImage(im);
return m;
}
QPixmap
PixmapFunctions::colourPixmap(const QPixmap &map, int hue, int minValue)
{
// assumes pixmap is currently in shades of grey; maps black ->
// solid colour and greys -> shades of colour
QImage image = map.convertToImage();
int s, v;
bool warned = false;
for (int y = 0; y < image.height(); ++y) {
for (int x = 0; x < image.width(); ++x) {
QColor pixel(image.pixel(x, y));
int oldHue;
pixel.hsv(&oldHue, &s, &v);
if (oldHue >= 0) {
if (!warned) {
std::cerr << "PixmapFunctions::recolour: Not a greyscale pixmap "
<< "(found rgb value " << pixel.red() << ","
<< pixel.green() << "," << pixel.blue()
<< "), hoping for the best" << std::endl;
warned = true;
}
}
image.setPixel
(x, y, QColor(hue,
255 - v,
v > minValue ? v : minValue,
QColor::Hsv).rgb());
}
}
QPixmap rmap;
rmap.convertFromImage(image);
if (map.mask()) rmap.setMask(*map.mask());
return rmap;
}
QPixmap
PixmapFunctions::shadePixmap(const QPixmap &map)
{
QImage image = map.convertToImage();
int h, s, v;
for (int y = 0; y < image.height(); ++y) {
for (int x = 0; x < image.width(); ++x) {
QColor pixel(image.pixel(x, y));
pixel.hsv(&h, &s, &v);
image.setPixel
(x, y, QColor(h,
s,
255 - ((255 - v) / 2),
QColor::Hsv).rgb());
}
}
QPixmap rmap;
rmap.convertFromImage(image);
if (map.mask()) rmap.setMask(*map.mask());
return rmap;
}
QPixmap
PixmapFunctions::flipVertical(const QPixmap &map)
{
QPixmap rmap;
QImage i(map.convertToImage());
rmap.convertFromImage(i.mirror(false, true));
if (map.mask()) {
QImage im(map.mask()->convertToImage());
QBitmap newMask;
newMask.convertFromImage(im.mirror(false, true));
rmap.setMask(newMask);
}
return rmap;
}
QPixmap
PixmapFunctions::flipHorizontal(const QPixmap &map)
{
QPixmap rmap;
QImage i(map.convertToImage());
rmap.convertFromImage(i.mirror(true, false));
if (map.mask()) {
QImage im(map.mask()->convertToImage());
QBitmap newMask;
newMask.convertFromImage(im.mirror(true, false));
rmap.setMask(newMask);
}
return rmap;
}
std::pair<QPixmap, QPixmap>
PixmapFunctions::splitPixmap(const QPixmap &pixmap, int x)
{
QPixmap left(x, pixmap.height(), pixmap.depth());
QBitmap leftMask(left.width(), left.height());
QPixmap right(pixmap.width() - x, pixmap.height(), pixmap.depth());
QBitmap rightMask(right.width(), right.height());
QPainter paint;
paint.begin(&left);
paint.drawPixmap(0, 0, pixmap, 0, 0, left.width(), left.height());
paint.end();
paint.begin(&leftMask);
paint.drawPixmap(0, 0, *pixmap.mask(), 0, 0, left.width(), left.height());
paint.end();
left.setMask(leftMask);
paint.begin(&right);
paint.drawPixmap(0, 0, pixmap, left.width(), 0, right.width(), right.height());
paint.end();
paint.begin(&rightMask);
paint.drawPixmap(0, 0, *pixmap.mask(), left.width(), 0, right.width(), right.height());
paint.end();
right.setMask(rightMask);
return std::pair<QPixmap, QPixmap>(left, right);
}
void
PixmapFunctions::drawPixmapMasked(QPixmap &dest, QBitmap &destMask,
int x0, int y0,
const QPixmap &src)
{
QImage idp(dest.convertToImage());
QImage idm(destMask.convertToImage());
QImage isp(src.convertToImage());
QImage ism(src.mask()->convertToImage());
for (int y = 0; y < isp.height(); ++y) {
for (int x = 0; x < isp.width(); ++x) {
if (x >= ism.width()) continue;
if (y >= ism.height()) continue;
if (ism.depth() == 1 && ism.pixel(x, y) == 0) continue;
if (ism.pixel(x, y) == Qt::white.rgb()) continue;
int x1 = x + x0;
int y1 = y + y0;
if (x1 < 0 || x1 >= idp.width()) continue;
if (y1 < 0 || y1 >= idp.height()) continue;
idp.setPixel(x1, y1, isp.pixel(x, y));
idm.setPixel(x1, y1, 1);
}
}
dest.convertFromImage(idp);
destMask.convertFromImage(idm);
}
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