src/platform/qt/DisplayGL.cpp (view raw)
1/* Copyright (c) 2013-2019 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_GLES2)
9
10#include "CoreController.h"
11
12#include <QApplication>
13#include <QOpenGLContext>
14#include <QOpenGLPaintDevice>
15#include <QMutexLocker>
16#include <QResizeEvent>
17#include <QScreen>
18#include <QTimer>
19#include <QWindow>
20
21#include <mgba/core/core.h>
22#include <mgba-util/math.h>
23#ifdef BUILD_GL
24#include "platform/opengl/gl.h"
25#endif
26#ifdef BUILD_GLES2
27#include "platform/opengl/gles2.h"
28#ifdef _WIN32
29#include <epoxy/wgl.h>
30#endif
31#endif
32
33using namespace QGBA;
34
35DisplayGL::DisplayGL(const QSurfaceFormat& format, QWidget* parent)
36 : Display(parent)
37 , m_gl(nullptr)
38{
39 setAttribute(Qt::WA_NativeWindow);
40 windowHandle()->create();
41
42 // This can spontaneously re-enter into this->resizeEvent before creation is done, so we
43 // need to make sure it's initialized to nullptr before we assign the new object to it
44 m_gl = new QOpenGLContext;
45 m_gl->setFormat(format);
46 m_gl->create();
47
48 m_gl->makeCurrent(windowHandle());
49#if defined(_WIN32) && defined(USE_EPOXY)
50 epoxy_handle_external_wglMakeCurrent();
51#endif
52 auto version = m_gl->format().version();
53 QStringList extensions = QString(reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS))).split(' ');
54
55 int forceVersion = 0;
56 if (format.majorVersion() < 2) {
57 forceVersion = 1;
58 }
59
60 if ((version == qMakePair(2, 1) && !extensions.contains("GL_ARB_framebuffer_object")) || version == qMakePair(2, 0)) {
61 QSurfaceFormat newFormat(format);
62 newFormat.setVersion(1, 4);
63 forceVersion = 1;
64 m_gl->setFormat(newFormat);
65 m_gl->create();
66 }
67
68 m_painter = new PainterGL(windowHandle(), m_gl, forceVersion);
69}
70
71DisplayGL::~DisplayGL() {
72 stopDrawing();
73 delete m_painter;
74 delete m_gl;
75}
76
77bool DisplayGL::supportsShaders() const {
78 return m_painter->supportsShaders();
79}
80
81VideoShader* DisplayGL::shaders() {
82 VideoShader* shaders = nullptr;
83 if (m_drawThread) {
84 QMetaObject::invokeMethod(m_painter, "shaders", Qt::BlockingQueuedConnection, Q_RETURN_ARG(VideoShader*, shaders));
85 } else {
86 shaders = m_painter->shaders();
87 }
88 return shaders;
89}
90
91void DisplayGL::startDrawing(std::shared_ptr<CoreController> controller) {
92 if (m_drawThread) {
93 return;
94 }
95 m_isDrawing = true;
96 m_painter->setContext(controller);
97 m_painter->setMessagePainter(messagePainter());
98 m_context = controller;
99 m_painter->resize(size());
100 m_drawThread = new QThread(this);
101 m_drawThread->setObjectName("Painter Thread");
102 m_gl->doneCurrent();
103 m_gl->moveToThread(m_drawThread);
104 m_painter->moveToThread(m_drawThread);
105 if (videoProxy()) {
106 videoProxy()->moveToThread(m_drawThread);
107 }
108 connect(m_drawThread, &QThread::started, m_painter, &PainterGL::start);
109 m_drawThread->start();
110
111 lockAspectRatio(isAspectRatioLocked());
112 lockIntegerScaling(isIntegerScalingLocked());
113 interframeBlending(hasInterframeBlending());
114 showOSDMessages(isShowOSD());
115 filter(isFiltered());
116#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
117 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatioF());
118#else
119 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatio());
120#endif
121 resizePainter();
122 setUpdatesEnabled(false);
123}
124
125void DisplayGL::stopDrawing() {
126 if (m_drawThread) {
127 m_isDrawing = false;
128 CoreController::Interrupter interrupter(m_context);
129 QMetaObject::invokeMethod(m_painter, "stop", Qt::BlockingQueuedConnection);
130 m_drawThread->exit();
131 m_drawThread->wait();
132 m_drawThread = nullptr;
133
134 m_gl->makeCurrent(windowHandle());
135#if defined(_WIN32) && defined(USE_EPOXY)
136 epoxy_handle_external_wglMakeCurrent();
137#endif
138 setUpdatesEnabled(true);
139 }
140 m_context.reset();
141}
142
143void DisplayGL::pauseDrawing() {
144 if (m_drawThread) {
145 m_isDrawing = false;
146 CoreController::Interrupter interrupter(m_context);
147 QMetaObject::invokeMethod(m_painter, "pause", Qt::BlockingQueuedConnection);
148 setUpdatesEnabled(true);
149 }
150}
151
152void DisplayGL::unpauseDrawing() {
153 if (m_drawThread) {
154 m_isDrawing = true;
155 CoreController::Interrupter interrupter(m_context);
156 QMetaObject::invokeMethod(m_painter, "unpause", Qt::BlockingQueuedConnection);
157 setUpdatesEnabled(false);
158 }
159}
160
161void DisplayGL::forceDraw() {
162 if (m_drawThread) {
163 QMetaObject::invokeMethod(m_painter, "forceDraw");
164 }
165}
166
167void DisplayGL::lockAspectRatio(bool lock) {
168 Display::lockAspectRatio(lock);
169 if (m_drawThread) {
170 QMetaObject::invokeMethod(m_painter, "lockAspectRatio", Q_ARG(bool, lock));
171 }
172}
173
174void DisplayGL::lockIntegerScaling(bool lock) {
175 Display::lockIntegerScaling(lock);
176 if (m_drawThread) {
177 QMetaObject::invokeMethod(m_painter, "lockIntegerScaling", Q_ARG(bool, lock));
178 }
179}
180
181void DisplayGL::interframeBlending(bool enable) {
182 Display::interframeBlending(enable);
183 if (m_drawThread) {
184 QMetaObject::invokeMethod(m_painter, "interframeBlending", Q_ARG(bool, enable));
185 }
186}
187
188void DisplayGL::showOSDMessages(bool enable) {
189 Display::showOSDMessages(enable);
190 if (m_drawThread) {
191 QMetaObject::invokeMethod(m_painter, "showOSD", Q_ARG(bool, enable));
192 }
193}
194
195void DisplayGL::filter(bool filter) {
196 Display::filter(filter);
197 if (m_drawThread) {
198 QMetaObject::invokeMethod(m_painter, "filter", Q_ARG(bool, filter));
199 }
200}
201
202void DisplayGL::framePosted() {
203 if (m_drawThread) {
204 m_painter->enqueue(m_context->drawContext());
205 QMetaObject::invokeMethod(m_painter, "draw");
206 }
207}
208
209void DisplayGL::setShaders(struct VDir* shaders) {
210 if (m_drawThread) {
211 QMetaObject::invokeMethod(m_painter, "setShaders", Qt::BlockingQueuedConnection, Q_ARG(struct VDir*, shaders));
212 } else {
213 m_painter->setShaders(shaders);
214 }
215}
216
217void DisplayGL::clearShaders() {
218 QMetaObject::invokeMethod(m_painter, "clearShaders");
219}
220
221
222void DisplayGL::resizeContext() {
223 if (m_drawThread) {
224 m_isDrawing = false;
225 CoreController::Interrupter interrupter(m_context);
226 QMetaObject::invokeMethod(m_painter, "resizeContext", Qt::BlockingQueuedConnection);
227 }
228}
229
230void DisplayGL::resizeEvent(QResizeEvent* event) {
231 Display::resizeEvent(event);
232 resizePainter();
233}
234
235void DisplayGL::resizePainter() {
236 if (m_drawThread) {
237 QMetaObject::invokeMethod(m_painter, "resize", Qt::BlockingQueuedConnection, Q_ARG(QSize, size()));
238 }
239}
240
241void DisplayGL::setVideoProxy(std::shared_ptr<VideoProxy> proxy) {
242 Display::setVideoProxy(proxy);
243 if (m_drawThread && proxy) {
244 proxy->moveToThread(m_drawThread);
245 }
246 m_painter->setVideoProxy(proxy);
247}
248
249int DisplayGL::framebufferHandle() {
250 return m_painter->glTex();
251}
252
253PainterGL::PainterGL(QWindow* surface, QOpenGLContext* parent, int forceVersion)
254 : m_gl(parent)
255 , m_surface(surface)
256{
257#ifdef BUILD_GL
258 mGLContext* glBackend;
259#endif
260#ifdef BUILD_GLES2
261 mGLES2Context* gl2Backend;
262#endif
263
264 m_gl->makeCurrent(m_surface);
265 m_window = new QOpenGLPaintDevice;
266#if defined(_WIN32) && defined(USE_EPOXY)
267 epoxy_handle_external_wglMakeCurrent();
268#endif
269
270#ifdef BUILD_GLES2
271 auto version = m_gl->format().version();
272 QStringList extensions = QString(reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS))).split(' ');
273 if (forceVersion != 1 && ((version == qMakePair(2, 1) && extensions.contains("GL_ARB_framebuffer_object")) || version.first > 2)) {
274 gl2Backend = static_cast<mGLES2Context*>(malloc(sizeof(mGLES2Context)));
275 mGLES2ContextCreate(gl2Backend);
276 m_backend = &gl2Backend->d;
277 m_supportsShaders = true;
278 }
279#endif
280
281#ifdef BUILD_GL
282 if (!m_backend) {
283 glBackend = static_cast<mGLContext*>(malloc(sizeof(mGLContext)));
284 mGLContextCreate(glBackend);
285 m_backend = &glBackend->d;
286 m_supportsShaders = false;
287 }
288#endif
289 m_backend->swap = [](VideoBackend* v) {
290 PainterGL* painter = static_cast<PainterGL*>(v->user);
291 if (!painter->m_gl->isValid()) {
292 return;
293 }
294 painter->m_gl->swapBuffers(painter->m_surface);
295 painter->m_gl->makeCurrent(painter->m_surface);
296#if defined(_WIN32) && defined(USE_EPOXY)
297 epoxy_handle_external_wglMakeCurrent();
298#endif
299 };
300
301 m_backend->init(m_backend, 0);
302#ifdef BUILD_GLES2
303 if (m_supportsShaders) {
304 m_shader.preprocessShader = static_cast<void*>(&reinterpret_cast<mGLES2Context*>(m_backend)->initialShader);
305 }
306#endif
307
308 m_backend->user = this;
309 m_backend->filter = false;
310 m_backend->lockAspectRatio = false;
311 m_backend->interframeBlending = false;
312
313 for (int i = 0; i < 2; ++i) {
314 m_free.append(new uint32_t[1024 * 2048]);
315 }
316}
317
318PainterGL::~PainterGL() {
319 while (!m_queue.isEmpty()) {
320 delete[] m_queue.dequeue();
321 }
322 for (auto item : m_free) {
323 delete[] item;
324 }
325 m_gl->makeCurrent(m_surface);
326#if defined(_WIN32) && defined(USE_EPOXY)
327 epoxy_handle_external_wglMakeCurrent();
328#endif
329#ifdef BUILD_GLES2
330 if (m_shader.passes) {
331 mGLES2ShaderFree(&m_shader);
332 }
333#endif
334 m_backend->deinit(m_backend);
335 m_gl->doneCurrent();
336 free(m_backend);
337 m_backend = nullptr;
338 delete m_window;
339}
340
341void PainterGL::setContext(std::shared_ptr<CoreController> context) {
342 m_context = context;
343 resizeContext();
344}
345
346void PainterGL::resizeContext() {
347 if (!m_context) {
348 return;
349 }
350
351 QSize size = m_context->screenDimensions();
352 m_backend->setDimensions(m_backend, size.width(), size.height());
353}
354
355void PainterGL::setMessagePainter(MessagePainter* messagePainter) {
356 m_messagePainter = messagePainter;
357}
358
359void PainterGL::resize(const QSize& size) {
360 m_size = size;
361 m_window->setSize(m_size);
362 if (m_started && !m_active) {
363 forceDraw();
364 }
365}
366
367void PainterGL::lockAspectRatio(bool lock) {
368 m_backend->lockAspectRatio = lock;
369 resize(m_size);
370}
371
372void PainterGL::lockIntegerScaling(bool lock) {
373 m_backend->lockIntegerScaling = lock;
374 resize(m_size);
375}
376
377void PainterGL::interframeBlending(bool enable) {
378 m_backend->interframeBlending = enable;
379}
380
381void PainterGL::showOSD(bool enable) {
382 m_showOSD = enable;
383}
384
385void PainterGL::filter(bool filter) {
386 m_backend->filter = filter;
387 if (m_started && !m_active) {
388 forceDraw();
389 }
390}
391
392void PainterGL::start() {
393 m_gl->makeCurrent(m_surface);
394#if defined(_WIN32) && defined(USE_EPOXY)
395 epoxy_handle_external_wglMakeCurrent();
396#endif
397
398#ifdef BUILD_GLES2
399 if (m_supportsShaders && m_shader.passes) {
400 mGLES2ShaderAttach(reinterpret_cast<mGLES2Context*>(m_backend), static_cast<mGLES2Shader*>(m_shader.passes), m_shader.nPasses);
401 }
402#endif
403
404 m_active = true;
405 m_started = true;
406}
407
408void PainterGL::draw() {
409 if (!m_active || m_queue.isEmpty()) {
410 return;
411 }
412 mCoreSync* sync = &m_context->thread()->impl->sync;
413 mCoreSyncWaitFrameStart(sync);
414 dequeue();
415 if (!m_delayTimer.isValid()) {
416 m_delayTimer.start();
417 } else if (sync->audioWait || sync->videoFrameWait) {
418 while (m_delayTimer.nsecsElapsed() + 2000000 < 1000000000 / sync->fpsTarget) {
419 QThread::usleep(500);
420 }
421 m_delayTimer.restart();
422 }
423 mCoreSyncWaitFrameEnd(sync);
424
425 forceDraw();
426}
427
428void PainterGL::forceDraw() {
429 m_painter.begin(m_window);
430 performDraw();
431 m_painter.end();
432 if (!m_context->thread()->impl->sync.audioWait && !m_context->thread()->impl->sync.videoFrameWait) {
433 if (m_delayTimer.elapsed() < 1000 / m_surface->screen()->refreshRate()) {
434 return;
435 }
436 m_delayTimer.restart();
437 }
438 m_backend->swap(m_backend);
439}
440
441void PainterGL::stop() {
442 m_active = false;
443 m_started = false;
444 dequeueAll();
445 m_backend->clear(m_backend);
446 m_backend->swap(m_backend);
447 if (m_videoProxy) {
448 m_videoProxy->reset();
449 }
450 m_gl->doneCurrent();
451 m_gl->moveToThread(m_surface->thread());
452 m_context.reset();
453 moveToThread(m_gl->thread());
454 if (m_videoProxy) {
455 m_videoProxy->moveToThread(m_gl->thread());
456 }
457}
458
459void PainterGL::pause() {
460 m_active = false;
461}
462
463void PainterGL::unpause() {
464 m_active = true;
465}
466
467void PainterGL::performDraw() {
468 m_painter.beginNativePainting();
469 float r = m_surface->devicePixelRatio();
470 m_backend->resized(m_backend, m_size.width() * r, m_size.height() * r);
471 m_backend->drawFrame(m_backend);
472 m_painter.endNativePainting();
473 if (m_showOSD && m_messagePainter) {
474 m_messagePainter->paint(&m_painter);
475 }
476}
477
478void PainterGL::enqueue(const uint32_t* backing) {
479 m_mutex.lock();
480 uint32_t* buffer = nullptr;
481 if (backing) {
482 if (m_free.isEmpty()) {
483 buffer = m_queue.dequeue();
484 } else {
485 buffer = m_free.takeLast();
486 }
487 QSize size = m_context->screenDimensions();
488 memcpy(buffer, backing, size.width() * size.height() * BYTES_PER_PIXEL);
489 }
490 m_queue.enqueue(buffer);
491 m_mutex.unlock();
492}
493
494void PainterGL::dequeue() {
495 m_mutex.lock();
496 if (m_queue.isEmpty()) {
497 m_mutex.unlock();
498 return;
499 }
500 uint32_t* buffer = m_queue.dequeue();
501 if (buffer) {
502 m_backend->postFrame(m_backend, buffer);
503 m_free.append(buffer);
504 }
505 m_mutex.unlock();
506}
507
508void PainterGL::dequeueAll() {
509 uint32_t* buffer = 0;
510 m_mutex.lock();
511 while (!m_queue.isEmpty()) {
512 buffer = m_queue.dequeue();
513 if (buffer) {
514 m_free.append(buffer);
515 }
516 }
517 if (buffer) {
518 m_backend->postFrame(m_backend, buffer);
519 }
520 m_mutex.unlock();
521}
522
523void PainterGL::setVideoProxy(std::shared_ptr<VideoProxy> proxy) {
524 m_videoProxy = proxy;
525}
526
527void PainterGL::setShaders(struct VDir* dir) {
528 if (!supportsShaders()) {
529 return;
530 }
531#ifdef BUILD_GLES2
532 if (!m_started) {
533 m_gl->makeCurrent(m_surface);
534#if defined(_WIN32) && defined(USE_EPOXY)
535 epoxy_handle_external_wglMakeCurrent();
536#endif
537 }
538 if (m_shader.passes) {
539 mGLES2ShaderDetach(reinterpret_cast<mGLES2Context*>(m_backend));
540 mGLES2ShaderFree(&m_shader);
541 }
542 mGLES2ShaderLoad(&m_shader, dir);
543 if (m_started) {
544 mGLES2ShaderAttach(reinterpret_cast<mGLES2Context*>(m_backend), static_cast<mGLES2Shader*>(m_shader.passes), m_shader.nPasses);
545 } else {
546 m_gl->doneCurrent();
547 }
548#endif
549}
550
551void PainterGL::clearShaders() {
552 if (!supportsShaders()) {
553 return;
554 }
555#ifdef BUILD_GLES2
556 if (m_shader.passes) {
557 mGLES2ShaderDetach(reinterpret_cast<mGLES2Context*>(m_backend));
558 mGLES2ShaderFree(&m_shader);
559 }
560#endif
561}
562
563VideoShader* PainterGL::shaders() {
564 return &m_shader;
565}
566
567int PainterGL::glTex() {
568#ifdef BUILD_GLES2
569 if (supportsShaders()) {
570 mGLES2Context* gl2Backend = reinterpret_cast<mGLES2Context*>(m_backend);
571 return gl2Backend->tex;
572 }
573#endif
574#ifdef BUILD_GL
575 mGLContext* glBackend = reinterpret_cast<mGLContext*>(m_backend);
576 return glBackend->tex[0];
577#else
578 return -1;
579#endif
580}
581
582#endif