74 lines
3.5 KiB
C++
74 lines
3.5 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop version of Telegram messaging app, see https://telegram.org
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Telegram Desktop is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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It is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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Full license: https://github.com/telegramdesktop/tdesktop/blob/master/LICENSE
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Copyright (c) 2014 John Preston, https://desktop.telegram.org
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*/
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#include "stdafx.h"
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#include "boxshadow.h"
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BoxShadow::BoxShadow(const style::rect &topLeft) : _size(topLeft.width() / cIntRetinaFactor()) {
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QImage cornersImage(_size * 2, _size * 2, QImage::Format_ARGB32_Premultiplied);
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{
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QPainter p(&cornersImage);
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p.drawPixmap(QPoint(0, 0), App::sprite(), topLeft);
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}
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uchar *bits = cornersImage.bits();
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if (bits) {
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for (
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quint32 *p = (quint32*)bits, *end = (quint32*)(bits + cornersImage.byteCount());
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p < end;
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++p
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) {
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*p = (*p ^ 0x00ffffff) << 24;
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}
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}
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{
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QPainter p(&cornersImage);
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p.setCompositionMode(QPainter::CompositionMode_Source);
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p.drawImage(0, _size, cornersImage.mirrored(), 0, _size, _size, _size);
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}
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{
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QPainter p(&cornersImage);
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p.setCompositionMode(QPainter::CompositionMode_Source);
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p.drawImage(_size, 0, cornersImage.mirrored(true, false), _size, 0, _size, _size * 2);
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}
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_corners = QPixmap::fromImage(cornersImage, Qt::ColorOnly);
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_colors.reserve(_size);
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uchar prev = 0;
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for (int32 i = 0; i < _size; ++i) {
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uchar a = (cornersImage.pixel(QPoint(i, _size - 1)) >> 24);
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if (a < prev) break;
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_colors.push_back(style::color(0, 0, 0, a));
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prev = a;
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}
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}
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void BoxShadow::paint(QPainter &p, const QRect &box, const QPoint &shift, int32 flags) {
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int32 count = _colors.size(), minus = _size - count + 1;
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bool left = (flags & Left), top = (flags & Top), right = (flags & Right), bottom = (flags & Bottom);
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if (left && top) p.drawPixmap(box.left() - _size + minus + shift.x(), box.top() - _size + minus + shift.y(), _corners, 0, 0, _size, _size);
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if (right && top) p.drawPixmap(box.right() - minus + 1 + shift.x(), box.top() - _size + minus + shift.y(), _corners, _size, 0, _size, _size);
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if (right && bottom) p.drawPixmap(box.right() - minus + 1 + shift.x(), box.bottom() - minus + 1 + shift.y(), _corners, _size, _size, _size, _size);
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if (left && bottom) p.drawPixmap(box.left() - _size + minus + shift.x(), box.bottom() - minus + 1 + shift.y(), _corners, 0, _size, _size, _size);
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for (int32 i = 1; i <= count; ++i) {
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p.setPen(_colors[i - 1]->p);
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if (top) p.fillRect(box.left() + (left ? minus : 0) + shift.x(), box.top() - count + i + shift.y(), box.width() - (right ? minus : 0) - (left ? minus : 0), cIntRetinaFactor(), _colors[i - 1]->b);
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if (right) p.fillRect(box.right() + count - i + shift.x(), box.top() + (top ? minus : 0) + shift.y(), cIntRetinaFactor(), box.height() - (bottom ? minus : 0) - (top ? minus : 0), _colors[i - 1]->b);
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if (bottom) p.fillRect(box.left() + (left ? minus : 0) + shift.x(), box.bottom() + count - i + shift.y(), box.width() - (right ? minus : 0) - (left ? minus : 0), cIntRetinaFactor(), _colors[i - 1]->b);
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if (left) p.fillRect(box.left() - count + i + shift.x(), box.top() + (top ? minus : 0) + shift.y(), cIntRetinaFactor(), box.height() - (bottom ? minus : 0) - (top ? minus : 0), _colors[i - 1]->b);
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}
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}
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