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 QSize dims = controller->screenDimensions();
96 setSystemDimensions(dims.width(), dims.height());
97
98 m_isDrawing = true;
99 m_painter->setContext(controller);
100 m_painter->setMessagePainter(messagePainter());
101 m_context = controller;
102 m_painter->resize(size());
103 m_drawThread = new QThread(this);
104 m_drawThread->setObjectName("Painter Thread");
105 m_gl->doneCurrent();
106 m_gl->moveToThread(m_drawThread);
107 m_painter->moveToThread(m_drawThread);
108 if (videoProxy()) {
109 videoProxy()->moveToThread(m_drawThread);
110 }
111 connect(m_drawThread, &QThread::started, m_painter, &PainterGL::start);
112 m_drawThread->start();
113
114 lockAspectRatio(isAspectRatioLocked());
115 lockIntegerScaling(isIntegerScalingLocked());
116 interframeBlending(hasInterframeBlending());
117 showOSDMessages(isShowOSD());
118 filter(isFiltered());
119#if (QT_VERSION >= QT_VERSION_CHECK(5, 6, 0))
120 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatioF());
121#else
122 messagePainter()->resize(size(), isAspectRatioLocked(), devicePixelRatio());
123#endif
124 resizePainter();
125 setUpdatesEnabled(false);
126}
127
128void DisplayGL::stopDrawing() {
129 if (m_drawThread) {
130 m_isDrawing = false;
131 CoreController::Interrupter interrupter(m_context);
132 QMetaObject::invokeMethod(m_painter, "stop", Qt::BlockingQueuedConnection);
133 m_drawThread->exit();
134 m_drawThread->wait();
135 m_drawThread = nullptr;
136
137 m_gl->makeCurrent(windowHandle());
138#if defined(_WIN32) && defined(USE_EPOXY)
139 epoxy_handle_external_wglMakeCurrent();
140#endif
141 setUpdatesEnabled(true);
142 }
143 m_context.reset();
144}
145
146void DisplayGL::pauseDrawing() {
147 if (m_drawThread) {
148 m_isDrawing = false;
149 CoreController::Interrupter interrupter(m_context);
150 QMetaObject::invokeMethod(m_painter, "pause", Qt::BlockingQueuedConnection);
151 setUpdatesEnabled(true);
152 }
153}
154
155void DisplayGL::unpauseDrawing() {
156 if (m_drawThread) {
157 m_isDrawing = true;
158 CoreController::Interrupter interrupter(m_context);
159 QMetaObject::invokeMethod(m_painter, "unpause", Qt::BlockingQueuedConnection);
160 setUpdatesEnabled(false);
161 }
162}
163
164void DisplayGL::forceDraw() {
165 if (m_drawThread) {
166 QMetaObject::invokeMethod(m_painter, "forceDraw");
167 }
168}
169
170void DisplayGL::lockAspectRatio(bool lock) {
171 Display::lockAspectRatio(lock);
172 if (m_drawThread) {
173 QMetaObject::invokeMethod(m_painter, "lockAspectRatio", Q_ARG(bool, lock));
174 }
175}
176
177void DisplayGL::lockIntegerScaling(bool lock) {
178 Display::lockIntegerScaling(lock);
179 if (m_drawThread) {
180 QMetaObject::invokeMethod(m_painter, "lockIntegerScaling", Q_ARG(bool, lock));
181 }
182}
183
184void DisplayGL::interframeBlending(bool enable) {
185 Display::interframeBlending(enable);
186 if (m_drawThread) {
187 QMetaObject::invokeMethod(m_painter, "interframeBlending", Q_ARG(bool, enable));
188 }
189}
190
191void DisplayGL::showOSDMessages(bool enable) {
192 Display::showOSDMessages(enable);
193 if (m_drawThread) {
194 QMetaObject::invokeMethod(m_painter, "showOSD", Q_ARG(bool, enable));
195 }
196}
197
198void DisplayGL::filter(bool filter) {
199 Display::filter(filter);
200 if (m_drawThread) {
201 QMetaObject::invokeMethod(m_painter, "filter", Q_ARG(bool, filter));
202 }
203}
204
205void DisplayGL::framePosted() {
206 if (m_drawThread) {
207 m_painter->enqueue(m_context->drawContext());
208 QMetaObject::invokeMethod(m_painter, "draw");
209 }
210}
211
212void DisplayGL::setShaders(struct VDir* shaders) {
213 if (m_drawThread) {
214 QMetaObject::invokeMethod(m_painter, "setShaders", Qt::BlockingQueuedConnection, Q_ARG(struct VDir*, shaders));
215 } else {
216 m_painter->setShaders(shaders);
217 }
218}
219
220void DisplayGL::clearShaders() {
221 QMetaObject::invokeMethod(m_painter, "clearShaders");
222}
223
224
225void DisplayGL::resizeContext() {
226 if (m_drawThread) {
227 m_isDrawing = false;
228 CoreController::Interrupter interrupter(m_context);
229 QMetaObject::invokeMethod(m_painter, "resizeContext", Qt::BlockingQueuedConnection);
230 }
231}
232
233void DisplayGL::resizeEvent(QResizeEvent* event) {
234 Display::resizeEvent(event);
235 resizePainter();
236}
237
238void DisplayGL::resizePainter() {
239 if (m_drawThread) {
240 QMetaObject::invokeMethod(m_painter, "resize", Qt::BlockingQueuedConnection, Q_ARG(QSize, size()));
241 }
242}
243
244void DisplayGL::setVideoProxy(std::shared_ptr<VideoProxy> proxy) {
245 Display::setVideoProxy(proxy);
246 if (m_drawThread && proxy) {
247 proxy->moveToThread(m_drawThread);
248 }
249 m_painter->setVideoProxy(proxy);
250}
251
252int DisplayGL::framebufferHandle() {
253 return m_painter->glTex();
254}
255
256PainterGL::PainterGL(QWindow* surface, QOpenGLContext* parent, int forceVersion)
257 : m_gl(parent)
258 , m_surface(surface)
259{
260#ifdef BUILD_GL
261 mGLContext* glBackend;
262#endif
263#ifdef BUILD_GLES2
264 mGLES2Context* gl2Backend;
265#endif
266
267 m_gl->makeCurrent(m_surface);
268 m_window = new QOpenGLPaintDevice;
269#if defined(_WIN32) && defined(USE_EPOXY)
270 epoxy_handle_external_wglMakeCurrent();
271#endif
272
273#ifdef BUILD_GLES2
274 auto version = m_gl->format().version();
275 QStringList extensions = QString(reinterpret_cast<const char*>(glGetString(GL_EXTENSIONS))).split(' ');
276 if (forceVersion != 1 && ((version == qMakePair(2, 1) && extensions.contains("GL_ARB_framebuffer_object")) || version.first > 2)) {
277 gl2Backend = static_cast<mGLES2Context*>(malloc(sizeof(mGLES2Context)));
278 mGLES2ContextCreate(gl2Backend);
279 m_backend = &gl2Backend->d;
280 m_supportsShaders = true;
281 }
282#endif
283
284#ifdef BUILD_GL
285 if (!m_backend) {
286 glBackend = static_cast<mGLContext*>(malloc(sizeof(mGLContext)));
287 mGLContextCreate(glBackend);
288 m_backend = &glBackend->d;
289 m_supportsShaders = false;
290 }
291#endif
292 m_backend->swap = [](VideoBackend* v) {
293 PainterGL* painter = static_cast<PainterGL*>(v->user);
294 if (!painter->m_gl->isValid()) {
295 return;
296 }
297 painter->m_gl->swapBuffers(painter->m_surface);
298 painter->m_gl->makeCurrent(painter->m_surface);
299#if defined(_WIN32) && defined(USE_EPOXY)
300 epoxy_handle_external_wglMakeCurrent();
301#endif
302 };
303
304 m_backend->init(m_backend, 0);
305#ifdef BUILD_GLES2
306 if (m_supportsShaders) {
307 m_shader.preprocessShader = static_cast<void*>(&reinterpret_cast<mGLES2Context*>(m_backend)->initialShader);
308 }
309#endif
310
311 m_backend->user = this;
312 m_backend->filter = false;
313 m_backend->lockAspectRatio = false;
314 m_backend->interframeBlending = false;
315
316 for (int i = 0; i < 2; ++i) {
317 m_free.append(new uint32_t[256 * 512]);
318 }
319}
320
321PainterGL::~PainterGL() {
322 while (!m_queue.isEmpty()) {
323 delete[] m_queue.dequeue();
324 }
325 for (auto item : m_free) {
326 delete[] item;
327 }
328 m_gl->makeCurrent(m_surface);
329#if defined(_WIN32) && defined(USE_EPOXY)
330 epoxy_handle_external_wglMakeCurrent();
331#endif
332#ifdef BUILD_GLES2
333 if (m_shader.passes) {
334 mGLES2ShaderFree(&m_shader);
335 }
336#endif
337 m_backend->deinit(m_backend);
338 m_gl->doneCurrent();
339 free(m_backend);
340 m_backend = nullptr;
341 delete m_window;
342}
343
344void PainterGL::setContext(std::shared_ptr<CoreController> context) {
345 m_context = context;
346 resizeContext();
347}
348
349void PainterGL::resizeContext() {
350 if (!m_context) {
351 return;
352 }
353
354 QSize size = m_context->screenDimensions();
355 m_backend->setDimensions(m_backend, size.width(), size.height());
356}
357
358void PainterGL::setMessagePainter(MessagePainter* messagePainter) {
359 m_messagePainter = messagePainter;
360}
361
362void PainterGL::resize(const QSize& size) {
363 m_size = size;
364 m_window->setSize(m_size);
365 if (m_started && !m_active) {
366 forceDraw();
367 }
368}
369
370void PainterGL::lockAspectRatio(bool lock) {
371 m_backend->lockAspectRatio = lock;
372 resize(m_size);
373}
374
375void PainterGL::lockIntegerScaling(bool lock) {
376 m_backend->lockIntegerScaling = lock;
377 resize(m_size);
378}
379
380void PainterGL::interframeBlending(bool enable) {
381 m_backend->interframeBlending = enable;
382}
383
384void PainterGL::showOSD(bool enable) {
385 m_showOSD = enable;
386}
387
388void PainterGL::filter(bool filter) {
389 m_backend->filter = filter;
390 if (m_started && !m_active) {
391 forceDraw();
392 }
393}
394
395void PainterGL::start() {
396 m_gl->makeCurrent(m_surface);
397#if defined(_WIN32) && defined(USE_EPOXY)
398 epoxy_handle_external_wglMakeCurrent();
399#endif
400
401#ifdef BUILD_GLES2
402 if (m_supportsShaders && m_shader.passes) {
403 mGLES2ShaderAttach(reinterpret_cast<mGLES2Context*>(m_backend), static_cast<mGLES2Shader*>(m_shader.passes), m_shader.nPasses);
404 }
405#endif
406
407 m_active = true;
408 m_started = true;
409}
410
411void PainterGL::draw() {
412 if (!m_active || m_queue.isEmpty()) {
413 return;
414 }
415 mCoreSync* sync = &m_context->thread()->impl->sync;
416 mCoreSyncWaitFrameStart(sync);
417 dequeue();
418 if (!m_delayTimer.isValid()) {
419 m_delayTimer.start();
420 } else if (sync->audioWait || sync->videoFrameWait) {
421 while (m_delayTimer.nsecsElapsed() + 2000000 < 1000000000 / sync->fpsTarget) {
422 QThread::usleep(500);
423 }
424 m_delayTimer.restart();
425 }
426 mCoreSyncWaitFrameEnd(sync);
427
428 forceDraw();
429}
430
431void PainterGL::forceDraw() {
432 m_painter.begin(m_window);
433 performDraw();
434 m_painter.end();
435 if (!m_context->thread()->impl->sync.audioWait && !m_context->thread()->impl->sync.videoFrameWait) {
436 if (m_delayTimer.elapsed() < 1000 / m_surface->screen()->refreshRate()) {
437 return;
438 }
439 m_delayTimer.restart();
440 }
441 m_backend->swap(m_backend);
442}
443
444void PainterGL::stop() {
445 m_active = false;
446 m_started = false;
447 dequeueAll();
448 m_backend->clear(m_backend);
449 m_backend->swap(m_backend);
450 if (m_videoProxy) {
451 m_videoProxy->reset();
452 }
453 m_gl->doneCurrent();
454 m_gl->moveToThread(m_surface->thread());
455 m_context.reset();
456 moveToThread(m_gl->thread());
457 if (m_videoProxy) {
458 m_videoProxy->moveToThread(m_gl->thread());
459 }
460}
461
462void PainterGL::pause() {
463 m_active = false;
464}
465
466void PainterGL::unpause() {
467 m_active = true;
468}
469
470void PainterGL::performDraw() {
471 m_painter.beginNativePainting();
472 float r = m_surface->devicePixelRatio();
473 m_backend->resized(m_backend, m_size.width() * r, m_size.height() * r);
474 m_backend->drawFrame(m_backend);
475 m_painter.endNativePainting();
476 if (m_showOSD && m_messagePainter) {
477 m_messagePainter->paint(&m_painter);
478 }
479}
480
481void PainterGL::enqueue(const uint32_t* backing) {
482 m_mutex.lock();
483 uint32_t* buffer = nullptr;
484 if (backing) {
485 if (m_free.isEmpty()) {
486 buffer = m_queue.dequeue();
487 } else {
488 buffer = m_free.takeLast();
489 }
490 QSize size = m_context->screenDimensions();
491 memcpy(buffer, backing, size.width() * size.height() * BYTES_PER_PIXEL);
492 }
493 m_queue.enqueue(buffer);
494 m_mutex.unlock();
495}
496
497void PainterGL::dequeue() {
498 m_mutex.lock();
499 if (m_queue.isEmpty()) {
500 m_mutex.unlock();
501 return;
502 }
503 uint32_t* buffer = m_queue.dequeue();
504 if (buffer) {
505 m_backend->postFrame(m_backend, buffer);
506 m_free.append(buffer);
507 }
508 m_mutex.unlock();
509}
510
511void PainterGL::dequeueAll() {
512 uint32_t* buffer = 0;
513 m_mutex.lock();
514 while (!m_queue.isEmpty()) {
515 buffer = m_queue.dequeue();
516 if (buffer) {
517 m_free.append(buffer);
518 }
519 }
520 if (buffer) {
521 m_backend->postFrame(m_backend, buffer);
522 }
523 m_mutex.unlock();
524}
525
526void PainterGL::setVideoProxy(std::shared_ptr<VideoProxy> proxy) {
527 m_videoProxy = proxy;
528}
529
530void PainterGL::setShaders(struct VDir* dir) {
531 if (!supportsShaders()) {
532 return;
533 }
534#ifdef BUILD_GLES2
535 if (!m_started) {
536 m_gl->makeCurrent(m_surface);
537#if defined(_WIN32) && defined(USE_EPOXY)
538 epoxy_handle_external_wglMakeCurrent();
539#endif
540 }
541 if (m_shader.passes) {
542 mGLES2ShaderDetach(reinterpret_cast<mGLES2Context*>(m_backend));
543 mGLES2ShaderFree(&m_shader);
544 }
545 mGLES2ShaderLoad(&m_shader, dir);
546 if (m_started) {
547 mGLES2ShaderAttach(reinterpret_cast<mGLES2Context*>(m_backend), static_cast<mGLES2Shader*>(m_shader.passes), m_shader.nPasses);
548 } else {
549 m_gl->doneCurrent();
550 }
551#endif
552}
553
554void PainterGL::clearShaders() {
555 if (!supportsShaders()) {
556 return;
557 }
558#ifdef BUILD_GLES2
559 if (m_shader.passes) {
560 mGLES2ShaderDetach(reinterpret_cast<mGLES2Context*>(m_backend));
561 mGLES2ShaderFree(&m_shader);
562 }
563#endif
564}
565
566VideoShader* PainterGL::shaders() {
567 return &m_shader;
568}
569
570int PainterGL::glTex() {
571#ifdef BUILD_GLES2
572 if (supportsShaders()) {
573 mGLES2Context* gl2Backend = reinterpret_cast<mGLES2Context*>(m_backend);
574 return gl2Backend->tex;
575 }
576#endif
577#ifdef BUILD_GL
578 mGLContext* glBackend = reinterpret_cast<mGLContext*>(m_backend);
579 return glBackend->tex[0];
580#else
581 return -1;
582#endif
583}
584
585#endif