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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0+ OR GPL-3.0 WITH Qt-GPL-exception-1.0
#include "algorithm.h"
#include "icon.h"
#include "qtcassert.h"
#include "theme/theme.h"
#include "stylehelper.h"
#include <QApplication>
#include <QDebug>
#include <QIcon>
#include <QImage>
#include <QPainter>
#include <QWidget>
namespace Utils {
static const qreal PunchEdgeWidth = 0.5;
static const qreal PunchEdgeIntensity = 0.6;
static QPixmap maskToColorAndAlpha(const QPixmap &mask, const QColor &color)
{
QImage result(mask.toImage().convertToFormat(QImage::Format_ARGB32));
result.setDevicePixelRatio(mask.devicePixelRatio());
auto bitsStart = reinterpret_cast<QRgb*>(result.bits());
const QRgb *bitsEnd = bitsStart + result.width() * result.height();
const QRgb tint = color.rgb() & 0x00ffffff;
const auto alpha = QRgb(color.alpha());
for (QRgb *pixel = bitsStart; pixel < bitsEnd; ++pixel) {
QRgb pixelAlpha = (((~*pixel) & 0xff) * alpha) >> 8;
*pixel = (pixelAlpha << 24) | tint;
}
return QPixmap::fromImage(result);
}
using MaskAndColor = QPair<QPixmap, QColor>;
using MasksAndColors = QList<MaskAndColor>;
static MasksAndColors masksAndColors(const QVector<IconMaskAndColor> &icon, int dpr)
{
MasksAndColors result;
for (const IconMaskAndColor &i: icon) {
const QString &fileName = i.first.toString();
const QColor color = creatorTheme()->color(i.second);
const QString dprFileName = StyleHelper::availableImageResolutions(i.first.toString())
.contains(dpr)
? StyleHelper::imageFileWithResolution(fileName, dpr)
: fileName;
QPixmap pixmap;
if (!pixmap.load(dprFileName)) {
pixmap = QPixmap(1, 1);
qWarning() << "Could not load image: " << dprFileName;
}
result.append({pixmap, color});
}
return result;
}
static void smearPixmap(QPainter *painter, const QPixmap &pixmap, qreal radius)
{
const qreal nagative = -radius - 0.01; // Workaround for QPainter rounding behavior
const qreal positive = radius;
painter->drawPixmap(QPointF(nagative, nagative), pixmap);
painter->drawPixmap(QPointF(0, nagative), pixmap);
painter->drawPixmap(QPointF(positive, nagative), pixmap);
painter->drawPixmap(QPointF(positive, 0), pixmap);
painter->drawPixmap(QPointF(positive, positive), pixmap);
painter->drawPixmap(QPointF(0, positive), pixmap);
painter->drawPixmap(QPointF(nagative, positive), pixmap);
painter->drawPixmap(QPointF(nagative, 0), pixmap);
}
static QPixmap combinedMask(const MasksAndColors &masks, Icon::IconStyleOptions style)
{
if (masks.count() == 1)
return masks.first().first;
QPixmap result(masks.first().first);
QPainter p(&result);
p.setCompositionMode(QPainter::CompositionMode_Darken);
auto maskImage = masks.constBegin();
maskImage++;
for (;maskImage != masks.constEnd(); ++maskImage) {
if (style & Icon::PunchEdges) {
p.save();
p.setOpacity(PunchEdgeIntensity);
p.setCompositionMode(QPainter::CompositionMode_Lighten);
smearPixmap(&p, maskToColorAndAlpha((*maskImage).first, Qt::white), PunchEdgeWidth);
p.restore();
}
p.drawPixmap(0, 0, (*maskImage).first);
}
p.end();
return result;
}
static QPixmap masksToIcon(const MasksAndColors &masks, const QPixmap &combinedMask, Icon::IconStyleOptions style)
{
QPixmap result(combinedMask.size());
result.setDevicePixelRatio(combinedMask.devicePixelRatio());
result.fill(Qt::transparent);
QPainter p(&result);
for (MasksAndColors::const_iterator maskImage = masks.constBegin();
maskImage != masks.constEnd(); ++maskImage) {
if (style & Icon::PunchEdges && maskImage != masks.constBegin()) {
// Punch a transparent outline around an overlay.
p.save();
p.setOpacity(PunchEdgeIntensity);
p.setCompositionMode(QPainter::CompositionMode_DestinationOut);
smearPixmap(&p, maskToColorAndAlpha((*maskImage).first, Qt::white), PunchEdgeWidth);
p.restore();
}
p.drawPixmap(0, 0, maskToColorAndAlpha((*maskImage).first, (*maskImage).second));
}
if (style & Icon::DropShadow && creatorTheme()->flag(Theme::ToolBarIconShadow)) {
const QPixmap shadowMask = maskToColorAndAlpha(combinedMask, Qt::black);
p.setCompositionMode(QPainter::CompositionMode_DestinationOver);
p.setOpacity(0.08);
p.drawPixmap(QPointF(0, -0.501), shadowMask);
p.drawPixmap(QPointF(-0.501, 0), shadowMask);
p.drawPixmap(QPointF(0.5, 0), shadowMask);
p.drawPixmap(QPointF(0.5, 0.5), shadowMask);
p.drawPixmap(QPointF(-0.501, 0.5), shadowMask);
p.setOpacity(0.3);
p.drawPixmap(0, 1, shadowMask);
}
p.end();
return result;
}
Icon::Icon() = default;
Icon::Icon(std::initializer_list<IconMaskAndColor> args, Icon::IconStyleOptions style)
: m_iconSourceList(args)
, m_style(style)
{
}
Icon::Icon(const FilePath &imageFileName)
{
m_iconSourceList.append({imageFileName, Theme::Color(-1)});
}
QIcon Icon::icon() const
{
if (m_iconSourceList.isEmpty())
return QIcon();
if (m_style == None)
return QIcon(m_iconSourceList.constFirst().first.toString());
const int maxDpr = qRound(qApp->devicePixelRatio());
if (maxDpr == m_lastDevicePixelRatio)
return m_lastIcon;
m_lastDevicePixelRatio = maxDpr;
m_lastIcon = QIcon();
for (int dpr = 1; dpr <= maxDpr; dpr++) {
const MasksAndColors masks = masksAndColors(m_iconSourceList, dpr);
const QPixmap combinedMask = Utils::combinedMask(masks, m_style);
m_lastIcon.addPixmap(masksToIcon(masks, combinedMask, m_style));
const QColor disabledColor = creatorTheme()->color(Theme::IconsDisabledColor);
m_lastIcon.addPixmap(maskToColorAndAlpha(combinedMask, disabledColor), QIcon::Disabled);
}
return m_lastIcon;
}
QPixmap Icon::pixmap(QIcon::Mode iconMode) const
{
if (m_iconSourceList.isEmpty()) {
return QPixmap();
} else if (m_style == None) {
return QPixmap(StyleHelper::dpiSpecificImageFile(m_iconSourceList.constFirst().first.toString()));
} else {
const MasksAndColors masks =
masksAndColors(m_iconSourceList, qRound(qApp->devicePixelRatio()));
const QPixmap combinedMask = Utils::combinedMask(masks, m_style);
return iconMode == QIcon::Disabled
? maskToColorAndAlpha(combinedMask, creatorTheme()->color(Theme::IconsDisabledColor))
: masksToIcon(masks, combinedMask, m_style);
}
}
FilePath Icon::imageFilePath() const
{
QTC_ASSERT(m_iconSourceList.length() == 1, return {});
return m_iconSourceList.first().first;
}
QIcon Icon::sideBarIcon(const Icon &classic, const Icon &flat)
{
QIcon result;
if (creatorTheme()->flag(Theme::FlatSideBarIcons)) {
result = flat.icon();
} else {
const QPixmap pixmap = classic.pixmap();
result.addPixmap(pixmap);
// Ensure that the icon contains a disabled state of that size, since
// Since we have icons with mixed sizes (e.g. DEBUG_START), and want to
// avoid that QIcon creates scaled versions of missing QIcon::Disabled
// sizes.
result.addPixmap(StyleHelper::disabledSideBarIcon(pixmap), QIcon::Disabled);
}
return result;
}
QIcon Icon::modeIcon(const Icon &classic, const Icon &flat, const Icon &flatActive)
{
QIcon result = sideBarIcon(classic, flat);
if (creatorTheme()->flag(Theme::FlatSideBarIcons))
result.addPixmap(flatActive.pixmap(), QIcon::Active);
return result;
}
QIcon Icon::combinedIcon(const QList<QIcon> &icons)
{
QIcon result;
QWindow *window = QApplication::allWidgets().constFirst()->windowHandle();
for (const QIcon &icon: icons)
for (const QIcon::Mode mode: {QIcon::Disabled, QIcon::Normal})
for (const QSize &size: icon.availableSizes(mode))
result.addPixmap(icon.pixmap(window, size, mode), mode);
return result;
}
QIcon Icon::combinedIcon(const QList<Icon> &icons)
{
const QList<QIcon> qIcons = transform(icons, &Icon::icon);
return combinedIcon(qIcons);
}
} // namespace Utils
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