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	, m_messageTimer(this)
 19	, m_scaleFactor(1)
 20{
 21	m_messageFont.setFamily("Source Code Pro");
 22	m_messageFont.setStyleHint(QFont::Monospace);
 23	m_messageFont.setPixelSize(13);
 24	connect(&m_messageTimer, &QTimer::timeout, this, &MessagePainter::clearMessage);
 25	m_messageTimer.setSingleShot(true);
 26	m_messageTimer.setInterval(5000);
 27
 28	clearMessage();
 29}
 30
 31void MessagePainter::resize(const QSize& size, bool lockAspectRatio, qreal scaleFactor) {
 32	int w = size.width();
 33	int h = size.height();
 34	int drawW = w;
 35	int drawH = h;
 36	if (lockAspectRatio) {
 37		if (w * 2 > h * 3) {
 38			drawW = h * 3 / 2;
 39		} else if (w * 2 < h * 3) {
 40			drawH = w * 2 / 3;
 41		}
 42	}
 43	m_world.reset();
 44	m_world.scale(qreal(drawW) / VIDEO_HORIZONTAL_PIXELS, qreal(drawH) / VIDEO_VERTICAL_PIXELS);
 45	m_scaleFactor = scaleFactor;
 46	m_local = QPoint(1, VIDEO_VERTICAL_PIXELS - m_messageFont.pixelSize() - 1);
 47	m_local = m_world.map(m_local);
 48	m_local += QPoint((w - drawW) / 2, (h - drawH) / 2);
 49	m_pixmapBuffer = QPixmap(drawW * m_scaleFactor,
 50		                     (m_messageFont.pixelSize() + 2) * m_world.m22() * m_scaleFactor);
 51	m_pixmapBuffer.setDevicePixelRatio(m_scaleFactor);
 52	m_mutex.lock();
 53	m_message.prepare(m_world, m_messageFont);
 54	redraw();
 55	m_mutex.unlock();
 56}
 57
 58void MessagePainter::redraw() {
 59	m_pixmapBuffer.fill(Qt::transparent);
 60	if (m_message.text().isEmpty()) {
 61		m_pixmap = m_pixmapBuffer;
 62		m_pixmap.setDevicePixelRatio(m_scaleFactor);
 63		return;
 64	}
 65	QPainter painter(&m_pixmapBuffer);
 66	painter.setWorldTransform(m_world);
 67	painter.setRenderHint(QPainter::Antialiasing);
 68	painter.setFont(m_messageFont);
 69	painter.setPen(Qt::black);
 70	const static int ITERATIONS = 11;
 71	for (int i = 0; i < ITERATIONS; ++i) {
 72		painter.save();
 73		painter.translate(cos(i * 2.0 * M_PI / ITERATIONS) * 0.8, sin(i * 2.0 * M_PI / ITERATIONS) * 0.8);
 74		painter.drawStaticText(0, 0, m_message);
 75		painter.restore();
 76	}
 77	painter.setPen(Qt::white);
 78	painter.drawStaticText(0, 0, m_message);
 79	m_pixmap = m_pixmapBuffer;
 80	m_pixmap.setDevicePixelRatio(m_scaleFactor);
 81}
 82
 83void MessagePainter::paint(QPainter* painter) {
 84	painter->drawPixmap(m_local, m_pixmap);
 85}
 86
 87
 88void MessagePainter::showMessage(const QString& message) {
 89	m_mutex.lock();
 90	m_message.setText(message);
 91	redraw();
 92	m_mutex.unlock();
 93	m_messageTimer.stop();
 94	m_messageTimer.start();
 95}
 96
 97void MessagePainter::clearMessage() {
 98	m_mutex.lock();
 99	m_message.setText(QString());
100	redraw();
101	m_mutex.unlock();
102	m_messageTimer.stop();
103}