src/platform/qt/DisplayGL.cpp (view raw)
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 "DisplayGL.h"
7
8#if defined(BUILD_GL) || defined(BUILD_GLES)
9
10#include <QApplication>
11#include <QResizeEvent>
12#include <QTimer>
13
14#include <mgba/core/core.h>
15#include <mgba/core/thread.h>
16#ifdef BUILD_GL
17#include "platform/opengl/gl.h"
18#endif
19#if !defined(_WIN32) || defined(USE_EPOXY)
20#include "platform/opengl/gles2.h"
21#ifdef _WIN32
22#include <epoxy/wgl.h>
23#endif
24#endif
25
26using namespace QGBA;
27
28DisplayGL::DisplayGL(const QGLFormat& format, QWidget* parent)
29 : Display(parent)
30 , m_gl(new EmptyGLWidget(format, this))
31{
32 m_painter = new PainterGL(format.majorVersion() < 2 ? 1 : m_gl->format().majorVersion(), m_gl);
33 m_gl->setMouseTracking(true);
34 m_gl->setAttribute(Qt::WA_TransparentForMouseEvents); // This doesn't seem to work?
35}
36
37DisplayGL::~DisplayGL() {
38 delete m_painter;
39}
40
41bool DisplayGL::supportsShaders() const {
42 return m_painter->supportsShaders();
43}
44
45VideoShader* DisplayGL::shaders() {
46 VideoShader* shaders = nullptr;
47 if (m_drawThread) {
48 QMetaObject::invokeMethod(m_painter, "shaders", Qt::BlockingQueuedConnection, Q_RETURN_ARG(VideoShader*, shaders));
49 } else {
50 shaders = m_painter->shaders();
51 }
52 return shaders;
53}
54
55void DisplayGL::startDrawing(mCoreThread* thread) {
56 if (m_drawThread) {
57 return;
58 }
59 m_isDrawing = true;
60 m_painter->setContext(thread);
61 m_painter->setMessagePainter(messagePainter());
62 m_context = thread;
63 m_painter->resize(size());
64 m_gl->move(0, 0);
65 m_drawThread = new QThread(this);
66 m_drawThread->setObjectName("Painter Thread");
67 m_gl->context()->doneCurrent();
68 m_gl->context()->moveToThread(m_drawThread);
69 m_painter->moveToThread(m_drawThread);
70 connect(m_drawThread, &QThread::started, m_painter, &PainterGL::start);
71 m_drawThread->start();
72 mCoreSyncSetVideoSync(&m_context->impl->sync, false);
73
74 lockAspectRatio(isAspectRatioLocked());
75 lockIntegerScaling(isIntegerScalingLocked());
76
77 unsigned width, height;
78 thread->core->desiredVideoDimensions(thread->core, &width, &height);
79 setSystemDimensions(width, height);
80
81 filter(isFiltered());
82#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
83 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatioF());
84#else
85 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatio());
86#endif
87 resizePainter();
88}
89
90void DisplayGL::stopDrawing() {
91 if (m_drawThread) {
92 m_isDrawing = false;
93 if (mCoreThreadIsActive(m_context)) {
94 mCoreThreadInterrupt(m_context);
95 }
96 QMetaObject::invokeMethod(m_painter, "stop", Qt::BlockingQueuedConnection);
97 m_drawThread->exit();
98 m_drawThread = nullptr;
99 if (mCoreThreadIsActive(m_context)) {
100 mCoreThreadContinue(m_context);
101 }
102 }
103}
104
105void DisplayGL::pauseDrawing() {
106 if (m_drawThread) {
107 m_isDrawing = false;
108 if (mCoreThreadIsActive(m_context)) {
109 mCoreThreadInterrupt(m_context);
110 }
111 QMetaObject::invokeMethod(m_painter, "pause", Qt::BlockingQueuedConnection);
112 if (mCoreThreadIsActive(m_context)) {
113 mCoreThreadContinue(m_context);
114 }
115 }
116}
117
118void DisplayGL::unpauseDrawing() {
119 if (m_drawThread) {
120 m_isDrawing = true;
121 if (mCoreThreadIsActive(m_context)) {
122 mCoreThreadInterrupt(m_context);
123 }
124 QMetaObject::invokeMethod(m_painter, "unpause", Qt::BlockingQueuedConnection);
125 if (mCoreThreadIsActive(m_context)) {
126 mCoreThreadContinue(m_context);
127 }
128 }
129}
130
131void DisplayGL::forceDraw() {
132 if (m_drawThread) {
133 QMetaObject::invokeMethod(m_painter, "forceDraw");
134 }
135}
136
137void DisplayGL::lockAspectRatio(bool lock) {
138 Display::lockAspectRatio(lock);
139 if (m_drawThread) {
140 QMetaObject::invokeMethod(m_painter, "lockAspectRatio", Q_ARG(bool, lock));
141 }
142}
143
144void DisplayGL::lockIntegerScaling(bool lock) {
145 Display::lockIntegerScaling(lock);
146 if (m_drawThread) {
147 QMetaObject::invokeMethod(m_painter, "lockIntegerScaling", Q_ARG(bool, lock));
148 }
149}
150
151void DisplayGL::filter(bool filter) {
152 Display::filter(filter);
153 if (m_drawThread) {
154 QMetaObject::invokeMethod(m_painter, "filter", Q_ARG(bool, filter));
155 }
156}
157
158void DisplayGL::framePosted(const uint32_t* buffer) {
159 if (m_drawThread && buffer) {
160 m_painter->enqueue(buffer);
161 QMetaObject::invokeMethod(m_painter, "draw");
162 }
163}
164
165void DisplayGL::setShaders(struct VDir* shaders) {
166 if (m_drawThread) {
167 QMetaObject::invokeMethod(m_painter, "setShaders", Qt::BlockingQueuedConnection, Q_ARG(struct VDir*, shaders));
168 } else {
169 m_painter->setShaders(shaders);
170 }
171}
172
173void DisplayGL::clearShaders() {
174 QMetaObject::invokeMethod(m_painter, "clearShaders");
175}
176
177void DisplayGL::resizeEvent(QResizeEvent* event) {
178 Display::resizeEvent(event);
179 resizePainter();
180}
181
182void DisplayGL::resizePainter() {
183 m_gl->resize(size());
184 if (m_drawThread) {
185 QMetaObject::invokeMethod(m_painter, "resize", Qt::BlockingQueuedConnection, Q_ARG(QSize, size()));
186 }
187}
188
189PainterGL::PainterGL(int majorVersion, QGLWidget* parent)
190 : m_gl(parent)
191 , m_active(false)
192 , m_started(false)
193 , m_context(nullptr)
194 , m_shader{}
195 , m_backend(nullptr)
196 , m_messagePainter(nullptr)
197{
198#ifdef BUILD_GL
199 mGLContext* glBackend;
200#endif
201#if !defined(_WIN32) || defined(USE_EPOXY)
202 mGLES2Context* gl2Backend;
203#endif
204
205#if !defined(_WIN32) || defined(USE_EPOXY)
206 if (majorVersion >= 2) {
207 gl2Backend = new mGLES2Context;
208 mGLES2ContextCreate(gl2Backend);
209 m_backend = &gl2Backend->d;
210 m_supportsShaders = true;
211 }
212#endif
213
214#ifdef BUILD_GL
215 if (!m_backend) {
216 glBackend = new mGLContext;
217 mGLContextCreate(glBackend);
218 m_backend = &glBackend->d;
219 m_supportsShaders = false;
220 }
221#endif
222 m_backend->swap = [](VideoBackend* v) {
223 PainterGL* painter = static_cast<PainterGL*>(v->user);
224 painter->m_gl->swapBuffers();
225 };
226
227 m_gl->makeCurrent();
228#if defined(_WIN32) && defined(USE_EPOXY)
229 epoxy_handle_external_wglMakeCurrent();
230#endif
231 m_backend->init(m_backend, reinterpret_cast<WHandle>(m_gl->winId()));
232#if !defined(_WIN32) || defined(USE_EPOXY)
233 if (m_supportsShaders) {
234 m_shader.preprocessShader = static_cast<void*>(&reinterpret_cast<mGLES2Context*>(m_backend)->initialShader);
235 }
236#endif
237 m_gl->doneCurrent();
238
239 m_backend->user = this;
240 m_backend->filter = false;
241 m_backend->lockAspectRatio = false;
242
243 for (int i = 0; i < 2; ++i) {
244 m_free.append(new uint32_t[256 * 384]);
245 }
246}
247
248PainterGL::~PainterGL() {
249 while (!m_queue.isEmpty()) {
250 delete[] m_queue.dequeue();
251 }
252 for (auto item : m_free) {
253 delete[] item;
254 }
255 m_gl->makeCurrent();
256#if defined(_WIN32) && defined(USE_EPOXY)
257 epoxy_handle_external_wglMakeCurrent();
258#endif
259#if !defined(_WIN32) || defined(USE_EPOXY)
260 if (m_shader.passes) {
261 mGLES2ShaderFree(&m_shader);
262 }
263#endif
264 m_backend->deinit(m_backend);
265 m_gl->doneCurrent();
266 delete m_backend;
267 m_backend = nullptr;
268}
269
270void PainterGL::setContext(mCoreThread* context) {
271 m_context = context;
272
273 if (!context) {
274 return;
275 }
276
277 m_gl->makeCurrent();
278#if defined(_WIN32) && defined(USE_EPOXY)
279 epoxy_handle_external_wglMakeCurrent();
280#endif
281 unsigned width, height;
282 context->core->desiredVideoDimensions(context->core, &width, &height);
283 m_backend->setDimensions(m_backend, width, height);
284 m_gl->doneCurrent();
285}
286
287void PainterGL::setMessagePainter(MessagePainter* messagePainter) {
288 m_messagePainter = messagePainter;
289}
290
291void PainterGL::resize(const QSize& size) {
292 m_size = size;
293 if (m_started && !m_active) {
294 forceDraw();
295 }
296}
297
298void PainterGL::lockAspectRatio(bool lock) {
299 m_backend->lockAspectRatio = lock;
300 if (m_started && !m_active) {
301 forceDraw();
302 }
303}
304
305void PainterGL::lockIntegerScaling(bool lock) {
306 m_backend->lockIntegerScaling = lock;
307 if (m_started && !m_active) {
308 forceDraw();
309 }
310}
311
312void PainterGL::filter(bool filter) {
313 m_backend->filter = filter;
314 if (m_started && !m_active) {
315 forceDraw();
316 }
317}
318
319void PainterGL::start() {
320 m_gl->makeCurrent();
321#if defined(_WIN32) && defined(USE_EPOXY)
322 epoxy_handle_external_wglMakeCurrent();
323#endif
324
325#if !defined(_WIN32) || defined(USE_EPOXY)
326 if (m_supportsShaders && m_shader.passes) {
327 mGLES2ShaderAttach(reinterpret_cast<mGLES2Context*>(m_backend), static_cast<mGLES2Shader*>(m_shader.passes), m_shader.nPasses);
328 }
329#endif
330
331 m_gl->doneCurrent();
332 m_active = true;
333 m_started = true;
334}
335
336void PainterGL::draw() {
337 if (m_queue.isEmpty() || !mCoreThreadIsActive(m_context)) {
338 return;
339 }
340
341 if (mCoreSyncWaitFrameStart(&m_context->impl->sync) || !m_queue.isEmpty()) {
342 dequeue();
343 mCoreSyncWaitFrameEnd(&m_context->impl->sync);
344 m_painter.begin(m_gl->context()->device());
345 performDraw();
346 m_painter.end();
347 m_backend->swap(m_backend);
348 if (!m_delayTimer.isValid()) {
349 m_delayTimer.start();
350 } else {
351 while (m_delayTimer.elapsed() < 15) {
352 QThread::usleep(100);
353 }
354 m_delayTimer.restart();
355 }
356 } else {
357 mCoreSyncWaitFrameEnd(&m_context->impl->sync);
358 }
359 if (!m_queue.isEmpty()) {
360 QMetaObject::invokeMethod(this, "draw", Qt::QueuedConnection);
361 }
362}
363
364void PainterGL::forceDraw() {
365 m_painter.begin(m_gl->context()->device());
366 performDraw();
367 m_painter.end();
368 m_backend->swap(m_backend);
369}
370
371void PainterGL::stop() {
372 m_active = false;
373 m_started = false;
374 m_gl->makeCurrent();
375#if defined(_WIN32) && defined(USE_EPOXY)
376 epoxy_handle_external_wglMakeCurrent();
377#endif
378 dequeueAll();
379 m_backend->clear(m_backend);
380 m_backend->swap(m_backend);
381 m_gl->doneCurrent();
382 m_gl->context()->moveToThread(m_gl->thread());
383 moveToThread(m_gl->thread());
384}
385
386void PainterGL::pause() {
387 m_active = false;
388}
389
390void PainterGL::unpause() {
391 m_active = true;
392}
393
394void PainterGL::performDraw() {
395 m_painter.beginNativePainting();
396#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
397 float r = m_gl->devicePixelRatioF();
398#else
399 float r = m_gl->devicePixelRatio();
400#endif
401 m_backend->resized(m_backend, m_size.width() * r, m_size.height() * r);
402 m_backend->drawFrame(m_backend);
403 m_painter.endNativePainting();
404 if (m_messagePainter) {
405 m_messagePainter->paint(&m_painter);
406 }
407}
408
409void PainterGL::enqueue(const uint32_t* backing) {
410 m_mutex.lock();
411 uint32_t* buffer;
412 if (m_free.isEmpty()) {
413 buffer = m_queue.dequeue();
414 } else {
415 buffer = m_free.takeLast();
416 }
417 unsigned width, height;
418 m_context->core->desiredVideoDimensions(m_context->core, &width, &height);
419 memcpy(buffer, backing, width * height * BYTES_PER_PIXEL);
420 m_queue.enqueue(buffer);
421 m_mutex.unlock();
422}
423
424void PainterGL::dequeue() {
425 m_mutex.lock();
426 if (m_queue.isEmpty()) {
427 m_mutex.unlock();
428 return;
429 }
430 uint32_t* buffer = m_queue.dequeue();
431 m_backend->postFrame(m_backend, buffer);
432 m_free.append(buffer);
433 m_mutex.unlock();
434}
435
436void PainterGL::dequeueAll() {
437 uint32_t* buffer = 0;
438 m_mutex.lock();
439 while (!m_queue.isEmpty()) {
440 buffer = m_queue.dequeue();
441 m_free.append(buffer);
442 }
443 if (buffer) {
444 m_backend->postFrame(m_backend, buffer);
445 }
446 m_mutex.unlock();
447}
448
449void PainterGL::setShaders(struct VDir* dir) {
450 if (!supportsShaders()) {
451 return;
452 }
453#if !defined(_WIN32) || defined(USE_EPOXY)
454 m_gl->makeCurrent();
455#if defined(_WIN32) && defined(USE_EPOXY)
456 epoxy_handle_external_wglMakeCurrent();
457#endif
458 if (m_shader.passes) {
459 mGLES2ShaderDetach(reinterpret_cast<mGLES2Context*>(m_backend));
460 mGLES2ShaderFree(&m_shader);
461 }
462 mGLES2ShaderLoad(&m_shader, dir);
463 if (m_started) {
464 mGLES2ShaderAttach(reinterpret_cast<mGLES2Context*>(m_backend), static_cast<mGLES2Shader*>(m_shader.passes), m_shader.nPasses);
465 }
466 m_gl->doneCurrent();
467#endif
468}
469
470void PainterGL::clearShaders() {
471 if (!supportsShaders()) {
472 return;
473 }
474#if !defined(_WIN32) || defined(USE_EPOXY)
475 m_gl->makeCurrent();
476#if defined(_WIN32) && defined(USE_EPOXY)
477 epoxy_handle_external_wglMakeCurrent();
478#endif
479 if (m_shader.passes) {
480 mGLES2ShaderDetach(reinterpret_cast<mGLES2Context*>(m_backend));
481 mGLES2ShaderFree(&m_shader);
482 }
483 m_gl->doneCurrent();
484#endif
485}
486
487VideoShader* PainterGL::shaders() {
488 return &m_shader;
489}
490
491#endif