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 <QPainter>
 9
10#include <mgba/core/core.h>
11#include <mgba/core/thread.h>
12
13using namespace QGBA;
14
15DisplayQt::DisplayQt(QWidget* parent)
16	: Display(parent)
17	, m_isDrawing(false)
18	, m_backing(nullptr)
19{
20}
21
22void DisplayQt::startDrawing(mCoreThread* context) {
23	context->core->desiredVideoDimensions(context->core, &m_width, &m_height);
24	m_backing = std::move(QImage());
25	m_isDrawing = true;
26}
27
28void DisplayQt::lockAspectRatio(bool lock) {
29	Display::lockAspectRatio(lock);
30	update();
31}
32
33void DisplayQt::lockIntegerScaling(bool lock) {
34	Display::lockIntegerScaling(lock);
35	update();
36}
37
38void DisplayQt::filter(bool filter) {
39	Display::filter(filter);
40	update();
41}
42
43void DisplayQt::framePosted(const uint32_t* buffer) {
44	update();
45	if (const_cast<const QImage&>(m_backing).bits() == reinterpret_cast<const uchar*>(buffer)) {
46		return;
47	}
48#ifdef COLOR_16_BIT
49#ifdef COLOR_5_6_5
50	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), m_width, m_height, QImage::Format_RGB16);
51#else
52	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), m_width, m_height, QImage::Format_RGB555);
53#endif
54#else
55	m_backing = QImage(reinterpret_cast<const uchar*>(buffer), m_width, m_height, QImage::Format_RGB32);
56#endif
57}
58
59void DisplayQt::paintEvent(QPaintEvent*) {
60	QPainter painter(this);
61	painter.fillRect(QRect(QPoint(), size()), Qt::black);
62	if (isFiltered()) {
63		painter.setRenderHint(QPainter::SmoothPixmapTransform);
64	}
65	QSize s = size();
66	QSize ds = s;
67	if (isAspectRatioLocked()) {
68		if (s.width() * m_height > s.height() * m_width) {
69			ds.setWidth(s.height() * m_width / m_height);
70		} else if (s.width() * m_height < s.height() * m_width) {
71			ds.setHeight(s.width() * m_height / m_width);
72		}
73	}
74	if (isIntegerScalingLocked()) {
75		ds.setWidth(ds.width() - ds.width() % m_width);
76		ds.setHeight(ds.height() - ds.height() % m_height);
77	}
78	QPoint origin = QPoint((s.width() - ds.width()) / 2, (s.height() - ds.height()) / 2);
79	QRect full(origin, ds);
80
81#ifdef COLOR_5_6_5
82	painter.drawImage(full, m_backing, QRect(0, 0, m_width, m_height));
83#else
84	painter.drawImage(full, m_backing.rgbSwapped(), QRect(0, 0, m_width, m_height));
85#endif
86	messagePainter()->paint(&painter);
87}