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 "DisplayQt.h"
  7
  8#include "CoreController.h"
  9
 10#include <QPainter>
 11
 12#include <mgba/core/core.h>
 13#include <mgba/core/thread.h>
 14#include <mgba-util/math.h>
 15
 16using namespace QGBA;
 17
 18DisplayQt::DisplayQt(QWidget* parent)
 19	: Display(parent)
 20{
 21}
 22
 23void DisplayQt::startDrawing(std::shared_ptr<CoreController> controller) {
 24	QSize size = controller->screenDimensions();
 25	m_width = size.width();
 26	m_height = size.height();
 27	m_backing = std::move(QImage());
 28	m_oldBacking = std::move(QImage());
 29	m_isDrawing = true;
 30	m_context = controller;
 31	emit drawingStarted();
 32}
 33
 34void DisplayQt::stopDrawing() {
 35	m_isDrawing = false;
 36	m_context.reset();
 37}
 38
 39void DisplayQt::lockAspectRatio(bool lock) {
 40	Display::lockAspectRatio(lock);
 41	update();
 42}
 43
 44void DisplayQt::lockIntegerScaling(bool lock) {
 45	Display::lockIntegerScaling(lock);
 46	update();
 47}
 48
 49void DisplayQt::interframeBlending(bool lock) {
 50	Display::interframeBlending(lock);
 51	update();
 52}
 53
 54void DisplayQt::filter(bool filter) {
 55	Display::filter(filter);
 56	update();
 57}
 58
 59void DisplayQt::framePosted() {
 60	update();
 61	const color_t* buffer = m_context->drawContext();
 62	if (const_cast<const QImage&>(m_backing).bits() == reinterpret_cast<const uchar*>(buffer)) {
 63		return;
 64	}
 65	m_oldBacking = m_backing;
 66#ifdef COLOR_16_BIT
 67#ifdef COLOR_5_6_5
 68	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), m_width, m_height, QImage::Format_RGB16);
 69#else
 70	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), m_width, m_height, QImage::Format_RGB555);
 71#endif
 72#else
 73	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), m_width, m_height, QImage::Format_ARGB32);
 74	m_backing = m_backing.convertToFormat(QImage::Format_RGB32);
 75#endif
 76#ifndef COLOR_5_6_5
 77	m_backing = m_backing.rgbSwapped();
 78#endif
 79}
 80
 81void DisplayQt::resizeContext() {
 82	if (!m_context) {
 83		return;
 84	}
 85	QSize size = m_context->screenDimensions();
 86	if (m_width != size.width() || m_height != size.height()) {
 87		m_width = size.width();
 88		m_height = size.height();
 89		m_oldBacking = std::move(QImage());
 90		m_backing = std::move(QImage());
 91	}
 92}
 93
 94void DisplayQt::paintEvent(QPaintEvent*) {
 95	QPainter painter(this);
 96	painter.fillRect(QRect(QPoint(), size()), Qt::black);
 97	if (isFiltered()) {
 98		painter.setRenderHint(QPainter::SmoothPixmapTransform);
 99	}
100	// TODO: Refactor this code out (since it's copied in like 3 places)
101	QSize s = size();
102	QSize ds = s;
103	if (isAspectRatioLocked()) {
104		if (s.width() * m_height > s.height() * m_width) {
105			ds.setWidth(s.height() * m_width / m_height);
106		} else if (s.width() * m_height < s.height() * m_width) {
107			ds.setHeight(s.width() * m_height / m_width);
108		}
109	}
110	if (isIntegerScalingLocked()) {
111		if (ds.width() >= m_width) {
112			ds.setWidth(ds.width() - ds.width() % m_width);
113		}
114		if (ds.height() >= m_height) {
115			ds.setHeight(ds.height() - ds.height() % m_height);
116		}
117	}
118	QPoint origin = QPoint((s.width() - ds.width()) / 2, (s.height() - ds.height()) / 2);
119	QRect full(origin, ds);
120
121	if (hasInterframeBlending()) {
122		painter.drawImage(full, m_oldBacking, QRect(0, 0, m_width, m_height));
123		painter.setOpacity(0.5);
124	}
125	painter.drawImage(full, m_backing, QRect(0, 0, m_width, m_height));
126	painter.setOpacity(1);
127	if (isShowOSD()) {
128		messagePainter()->paint(&painter);
129	}
130}