1/* Copyright (c) 2013-2015 Jeffrey Pfau
  2 *
  3 * This Source Code Form is subject to the terms of the Mozilla Public
  4 * License, v. 2.0. If a copy of the MPL was not distributed with this
  5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
  6#include "MessagePainter.h"
  7
  8#include <QPainter>
  9
 10#include <QDebug>
 11
 12#include <mgba/internal/gba/video.h>
 13
 14using namespace QGBA;
 15
 16MessagePainter::MessagePainter(QObject* parent)
 17	: QObject(parent)
 18{
 19	m_messageFont.setFamily("Source Code Pro");
 20	m_messageFont.setStyleHint(QFont::Monospace);
 21	m_messageFont.setPixelSize(13);
 22	connect(&m_messageTimer, &QTimer::timeout, this, &MessagePainter::clearMessage);
 23	m_messageTimer.setSingleShot(true);
 24	m_messageTimer.setInterval(5000);
 25
 26	clearMessage();
 27}
 28
 29void MessagePainter::resize(const QSize& size, bool lockAspectRatio, qreal scaleFactor) {
 30	int w = size.width();
 31	int h = size.height();
 32	int drawW = w;
 33	int drawH = h;
 34	if (lockAspectRatio) {
 35		if (w * 2 > h * 3) {
 36			drawW = h * 3 / 2;
 37		} else if (w * 2 < h * 3) {
 38			drawH = w * 2 / 3;
 39		}
 40	}
 41	m_world.reset();
 42	m_world.scale(qreal(drawW) / VIDEO_HORIZONTAL_PIXELS, qreal(drawH) / VIDEO_VERTICAL_PIXELS);
 43	m_scaleFactor = scaleFactor;
 44	m_local = QPoint(1, VIDEO_VERTICAL_PIXELS - m_messageFont.pixelSize() - 1);
 45	m_local = m_world.map(m_local);
 46	m_local += QPoint((w - drawW) / 2, (h - drawH) / 2);
 47	m_pixmapBuffer = QPixmap(drawW * m_scaleFactor,
 48		                     (m_messageFont.pixelSize() + 2) * m_world.m22() * m_scaleFactor);
 49	m_pixmapBuffer.setDevicePixelRatio(m_scaleFactor);
 50	m_mutex.lock();
 51	m_message.prepare(m_world, m_messageFont);
 52	redraw();
 53	m_mutex.unlock();
 54}
 55
 56void MessagePainter::redraw() {
 57	m_pixmapBuffer.fill(Qt::transparent);
 58	if (m_message.text().isEmpty()) {
 59		m_pixmap = m_pixmapBuffer;
 60		m_pixmap.setDevicePixelRatio(m_scaleFactor);
 61		return;
 62	}
 63	QPainter painter(&m_pixmapBuffer);
 64	painter.setWorldTransform(m_world);
 65	painter.setRenderHint(QPainter::Antialiasing);
 66	painter.setFont(m_messageFont);
 67	painter.setPen(Qt::black);
 68	const static int ITERATIONS = 11;
 69	for (int i = 0; i < ITERATIONS; ++i) {
 70		painter.save();
 71		painter.translate(cos(i * 2.0 * M_PI / ITERATIONS) * 0.8, sin(i * 2.0 * M_PI / ITERATIONS) * 0.8);
 72		painter.drawStaticText(0, 0, m_message);
 73		painter.restore();
 74	}
 75	painter.setPen(Qt::white);
 76	painter.drawStaticText(0, 0, m_message);
 77	m_pixmap = m_pixmapBuffer;
 78	m_pixmap.setDevicePixelRatio(m_scaleFactor);
 79}
 80
 81void MessagePainter::paint(QPainter* painter) {
 82	painter->drawPixmap(m_local, m_pixmap);
 83}
 84
 85
 86void MessagePainter::showMessage(const QString& message) {
 87	m_mutex.lock();
 88	m_message.setText(message);
 89	redraw();
 90	m_mutex.unlock();
 91	m_messageTimer.stop();
 92	m_messageTimer.start();
 93}
 94
 95void MessagePainter::clearMessage() {
 96	m_mutex.lock();
 97	m_message.setText(QString());
 98	redraw();
 99	m_mutex.unlock();
100	m_messageTimer.stop();
101}